More annual reports from Ultragenyx Pharmaceutical:
2023 ReportPeers and competitors of Ultragenyx Pharmaceutical:
Galera Therapeutics, Inc.UNITED STATES SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 
Form 10-K
☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 
For the fiscal year ended December 31, 2022
OR 
☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 
For the transition period from       to
Commission File No. 001-36276
Ultragenyx Pharmaceutical Inc. 
(Exact name of registrant as specified in its charter) 
Delaware
(State or other jurisdiction of
incorporation or organization)
60 Leveroni Court
Novato, California
(Address of principal executive offices)
27-2546083
(I.R.S. Employer Identification No.)
94949
(Zip Code)
(415) 483-8800 
(Registrant’s telephone number, including area code) 
Securities registered pursuant to Section 12(b) of the Exchange Act: 
Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Common Stock, $0.001 par value
RARE
The Nasdaq Global Select Market
Securities registered pursuant to Section 12(g) of the Exchange Act: None. 
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    YES  ☑    NO  ☐ 
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.    YES  ☐    NO   ☑ 
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the 
preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for 
the past 90 days.    YES  ☑    NO  ☐ 
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 
of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    
Yes  ☑    NO  ☐ 
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or 
an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth 
company” in Rule 12b-2 of the Exchange Act.  
Large accelerated filer ☑ 
Non- accelerated filer  ☐ 
Emerging growth company ☐
Accelerated filer  ☐
Smaller reporting company  ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any 
new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal 
control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or 
issued its audit report. ☑
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  ☐    NO   ☑ 
If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing 
reflect the correction of an error to previously issued financial statements. ☐
Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation 
received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐
 
 
 
  
  
  
  
 
 
 
 
 
 
 
 
 
 
The aggregate market value of the voting and non-voting common equity held by non-affiliates of the Company as of June 30, 2022 
was approximately $3.3 billion, based upon the closing price on The Nasdaq Global Select Market reported for such date. Shares of common 
stock held by each executive officer and director and by each person who is known to own 10% or more of the outstanding common stock 
have been excluded as such persons may be deemed affiliates of the Company. This determination of affiliate status is not necessarily a 
conclusive determination for other purposes. 
As of February 13, 2023, the Company had 70,216,689 shares of common stock issued and outstanding. 
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s definitive proxy statement relating to its 2023 Annual Meeting of Stockholders, to be held on or about June 
7, 2023, are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Such proxy statement will be filed 
with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates. 
Table of Contents 
PART I
Item 1.
  Business
Item 1A.
  Risk Factors
Item 1B.
  Unresolved Staff Comments
Item 2.
  Properties
Item 3.
  Legal Proceedings
Item 4.
  Mine Safety Disclosures
Item 5.
  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
PART II
Item 6.
  Reserved
Item 7.
  Management’s Discussion and Analysis of Financial Condition and Results of Operations
Item 7A.
  Quantitative and Qualitative Disclosures About Market Risk
Item 8.
  Financial Statements and Supplementary Data
Item 9.
  Changes in and Disagreements With Accountants on Accounting and Financial Disclosure
Item 9A.
  Controls and Procedures
Item 9B.
  Other Information
Item 9C.
  Disclosure Regarding Foreign Jurisdictions that Prevent Inspections 
PART III
Item 10.
  Directors, Executive Officers and Corporate Governance
Item 11.
  Executive Compensation
Item 12.
  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Item 13.
  Certain Relationships and Related Transactions, and Director Independence
Item 14.
  Principal Accountant Fees and Services
Item 15.
  Exhibits and Financial Statement Schedules
PART IV
Pag
e
5
33
69
69
69
69
70
70
71
82
82
82
83
84
84
85
85
85
85
85
86
 
 
 
  
  
     
  
 
 
  
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
  
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
  
 
 
Item 16.
  Form 10-K Summary
SIGNATURES
92
93
 
  
 
  
 
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS
This Annual Report on Form 10-K, or Annual Report, contains forward-looking statements that involve risks and uncertainties. We 
make such forward-looking statements pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and 
other federal securities laws. All statements other than statements of historical fact contained in this Annual Report are forward-looking 
statements. In some cases, you can identify forward-looking statements by words such as “anticipate,” “believe,” “contemplate,” “continue,” 
“could,” “estimate,” “expect,” “forecast,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will,” “would,” or the 
negative of these words, or other comparable terminology. These forward-looking statements include, but are not limited to, statements 
about: 
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
our commercialization, marketing, and manufacturing capabilities and strategy;
our expectations regarding the timing of clinical study commencements and reporting results from same; 
the timing and likelihood of regulatory approvals for our product candidates;
the anticipated indications for our product candidates, if approved; 
the potential market opportunities for commercializing our products and product candidates; 
our expectations regarding the potential market size and the size of the patient populations for our products and product 
candidates, if approved for commercial use; 
estimates of our expenses, revenue, capital requirements, and our needs for additional financing; 
our ability to develop, acquire, and advance product candidates into, and successfully complete, clinical studies; 
the implementation of our business model and strategic plans for our business, products and product candidates and the 
integration and performance of any businesses we have acquired or may acquire;
the initiation, timing, progress, and results of ongoing and future preclinical and clinical studies, and our research and 
development programs; 
the scope of protection we are able to establish and maintain for intellectual property rights covering our products and product 
candidates; 
our ability to maintain and establish collaborations or strategic relationships or obtain additional funding; 
our ability to maintain and establish relationships with third parties, such as contract research organizations, contract 
manufacturing organizations, suppliers, and distributors;
our financial performance and the expansion of our organization; 
the impact of the COVID-19 pandemic and related health measures on our business, financial condition and liquidity;
our ability to obtain supply of our products and product candidates;
the scalability and commercial viability of our manufacturing methods and processes;
developments and projections relating to our competitors and our industry;
stagnating or worsening business and economic conditions and increasing geopolitical instability, including inflationary 
pressures, general economic slowdown or a recession, rising interest rates, foreign exchange rate volatility, and changes in 
monetary policy; and
other risks and uncertainties, including those listed under “Part I, Item 1A. Risk Factors.”
Any forward-looking statements in this Annual Report reflect our current views with respect to future events or to our future financial 
performance and involve known and unknown risks, uncertainties, and other factors that may cause our actual results, performance, or 
achievements to be materially different from any future results, performance, or achievements expressed or implied by these forward-looking 
statements. Factors that may cause actual results to differ materially from current expectations include, among other things, those discussed 
under Part I, Item 1A. Risk Factors and discussed elsewhere in this Annual Report. Given these uncertainties, you should not place undue 
reliance on these forward-looking statements. Except as required by law, we assume no obligation to update or revise these forward-looking 
statements for any reason, even if new information becomes available in the future.
4
 
This Annual Report also contains estimates, projections, and other information concerning our industry, our business, and the markets 
for certain diseases, including data regarding the estimated size of those markets, and the incidence and prevalence of certain medical 
conditions. Information that is based on estimates, forecasts, projections, market research, or similar methodologies is inherently subject to 
uncertainties and actual events or circumstances may differ materially from events and circumstances reflected in this information. Unless 
otherwise expressly stated, we obtained this industry, business, market, and other data from reports, research surveys, studies, and similar 
data prepared by market research firms and other third parties, industry, medical and general publications, government data, and similar 
sources.
As used in this Annual Report, “Ultragenyx,” “we,” “our,” and similar terms refer to Ultragenyx Pharmaceutical Inc. and its subsidiaries, 
unless the context indicates otherwise.
Item 1. Business
Overview 
PART I 
We are a biopharmaceutical company focused on the identification, acquisition, development, and commercialization of novel products 
for the treatment of serious rare and ultra-rare genetic diseases. We target diseases for which the unmet medical need is high, the biology for 
treatment is clear, and for which there are typically no approved therapies treating the underlying disease. 
The patients we seek to treat have diseases with limited or no treatment options, and we recognize that their lives and well-being are 
dependent upon our efforts to develop new therapies. For this reason, we are passionate about developing these therapies with the utmost 
urgency and care. 
We were founded in April 2010 by our President and Chief Executive Officer, Emil Kakkis, M.D., Ph.D., and we have since assembled 
an experienced team with extensive rare disease drug development and commercialization capabilities. 
Our Strategy 
The critical components of our business strategy include the following: 
•
•
•
•
Focus on rare and ultra-rare genetic diseases with significant unmet medical need and clear biology. There are numerous 
rare and ultra-rare genetic diseases that currently have no drug therapy approved that treat the underlying disease. Patients 
suffering from these diseases often have a significant morbidity and/or mortality. We focus on developing and commercializing 
therapies for multiple such indications with the utmost urgency. We also focus on diseases that have biology that is well understood. 
We believe that developing drugs that directly impact known disease pathways will increase the probability of success of our 
development programs. Our modalities of biologics, small molecules, gene therapy, and nucleic acids provide us with what we 
believe is an optimal set of options to treat genetic diseases by selecting the best treatment strategy available for each disease. 
In-license promising product candidates; retain global commercialization rights to product candidates. Our current product 
candidates are generally in-licensed from academic institutions or derived from partnerships with other pharmaceutical companies. 
We believe parties agree to license product candidates to us because they are confident in our team’s expertise in rare disease 
drug development and commercialization. We generally intend to retain global commercialization rights to our products and product 
candidates whenever possible to maximize the potential value of our product portfolio. 
Focus on excellent, rapid, and efficient clinical and regulatory execution on multiple programs in parallel. We believe that 
building a successful and sustainable rare disease-focused company requires very specific expertise in the areas of patient 
identification, clinical study design and conduct, and regulatory strategy. Because rare disease programs involve fewer patients and 
may have accelerated paths to market, we are able to feasibly develop multiple clinical-stage product candidates in parallel, 
resulting in a more diversified portfolio that provides multiple opportunities to create value, with some economies of scale.
Commercialize through patient-focused global organization. We seek to commercialize our products throughout the developed 
world, in North America, the European Union, or the EU, the United Kingdom, or the U.K., Latin America, Turkey, Asia, and select 
international markets. We have established our own commercial organization in these markets and a network of third-party 
distributors in smaller markets. We believe our commercial organization is highly specialized and focused, due to the nature of rare 
disease treatment.
5
 
 
 
Approved Products and Clinical Product Candidates
Our current approved therapies and clinical-stage pipeline consist of four product categories: biologics, small molecules, gene therapy, 
and nucleic acid product candidates.
We have four commercially approved products, Crysvita® (burosumab) for the treatment of X-linked hypophosphatemia, or XLH, and 
tumor-induced osteomalacia, or TIO, Mepsevii® (vestronidase alfa) for the treatment of mucopolysaccharidosis VII, or MPSVII or Sly 
Syndrome, Dojolvi® (triheptanoin) for the treatment of long-chain fatty acid oxidation disorders, or LC-FAOD, and Evkeeza® (evinacumab) 
for the treatment of homozygous familial hypercholesterolemia, or HoFH. The following table summarizes our approved products and clinical 
product candidate pipeline:
6
 
 
Approved Products
Crysvita for the treatment of XLH and TIO
Crysvita is an antibody administered via subcutaneous injection that targets fibroblast growth factor 23, or FGF23, developed for the 
treatment of XLH, a rare, hereditary, progressive, and lifelong musculoskeletal disorder characterized by renal phosphate wasting caused by 
excess FGF23 production. There are approximately 48,000 patients with XLH in the developed world, including approximately 36,000 adults 
and 12,000 children. Crysvita is the only approved treatment that addresses the underlying cause of XLH. Crysvita is approved in the U.S., 
the EU and certain other regions for the treatment of XLH in adult and pediatric patients one year of age and older. 
Crysvita is also approved in the U.S. and certain other regions for the treatment of FGF23-related hypophosphatemia in tumor-induced 
osteomalacia, or TIO, associated with phosphaturic mesenchymal tumors that cannot be curatively resected or localized in adults and 
pediatric patients 2 years of age and older. There are approximately 2,000 to 4,000 patients with TIO in the developed world. TIO can lead to 
severe hypophosphatemia, osteomalacia, fractures, fatigue, bone and muscle pain, and muscle weakness.
We are collaborating with Kyowa Kirin Co., Ltd., or KKC (formerly Kyowa Hakko Kirin Co., Ltd., or KHK), and Kyowa Kirin, a wholly 
owned subsidiary of KKC, on the development and commercialization of Crysvita globally.
Please see “—License and Collaboration Agreements—Approved Products—Kyowa Hakko Kirin” for a description of our collaboration 
and license agreement with KKC.
Mepsevii for the treatment of MPS VII
Mepsevii is an intravenous, or IV, enzyme replacement therapy, developed for the treatment of Mucopolysaccharidosis VII, also known 
as MPS VII or Sly syndrome, a rare lysosomal storage disease that often leads to multi-organ dysfunction, pervasive skeletal disease, and 
death. MPS VII is one of the rarest MPS disorders, affecting an estimated 200 patients in the developed world. Mepsevii is approved in the 
U.S., the EU and certain other regions for the treatment of children and adults with MPS VII. 
Please see “—License and Collaboration Agreements—Approved Products—Saint Louis University” for a description of our license 
agreement with Saint Louis University.
Dojolvi for the treatment of LC-FAOD 
Dojolvi is a highly purified, synthetic, 7-carbon fatty acid triglyceride specifically designed to provide medium-chain, odd-carbon fatty 
acids as an energy source and metabolite replacement for people with long-chain fatty acid oxidation disorders, or LC-FAOD, which is a set 
of rare metabolic diseases that prevents the conversion of fat into energy and can cause low blood sugar, muscle rupture, and heart and liver 
disease. Dojolvi is approved in the U.S. and certain other regions as a source of calories and fatty acids for the treatment of pediatric and 
adult patients with molecularly confirmed LC-FAOD. There are approximately 8,000 to 14,000 patients in the developed world with LC-FAOD.
Please see “—License and Collaboration Agreements—Approved Products—Baylor Research Institute” for a description of our license 
agreement with Baylor Research Institute.
Evkeeza for the treatment of HoFH 
Evkeeza is a fully human monoclonal antibody that binds to and blocks the function of angiopoietin-like 3, or ANGPTL3, a protein that 
plays a key role in lipid metabolism. Evkeeza is an approved therapy for the treatment of homozygous familial hypercholesterolemia, or 
HoFH, a rare inherited condition. HoFH occurs when two copies of the familial hypercholesterolemia, or FH,-causing genes are inherited, one 
from each parent, resulting in dangerously high levels (>400 mg/dL) of LDL-C, or bad cholesterol. Patients with HoFH are at risk for 
premature atherosclerotic disease and cardiac events as early as their teenage years. Evkeeza is approved in the U.S., where it is marketed 
by our partner Regeneron Pharmaceuticals, or Regeneron. It is also approved in the European Economic Area, or EEA, as a first-in-class 
therapy for use together with diet and other low-density lipoprotein-cholesterol, or LDL-C, lowering therapies to treat adults and adolescents 
aged 12 years and older with clinical HoFH. There are approximately 3,000 to 5,000 patients with HoFH in the developed world outside of the 
U.S.
In January 2022, we announced a collaboration with Regeneron to commercialize Evkeeza outside of the U.S. We are in the process of 
engaging country authorities within the EEA, Latin America, Canada and Japan to negotiate pricing and reimbursement guidelines.
Please see “—License and Collaboration Agreements—Approved Products—Regeneron” for a description of our license agreement 
with Regeneron Pharmaceuticals.
7
 
Clinical Product Candidates
UX143 (setrusumab) for the treatment of Osteogenesis Imperfecta, or OI
UX143 (setrusumab) is a fully human monoclonal antibody that inhibits sclerostin, a protein that acts on a key bone-signaling pathway 
by inhibiting the activity of bone-forming cells and promoting bone resorption. Setrusumab is being studied for the treatment of OI, and has 
received orphan drug designation from the U.S. Food and Drug Administration, or FDA, and European Medicines Agency, or EMA, rare 
pediatric disease designation from the FDA, and was accepted into the EMA’s Priority Medicines program, or PRIME, program. Setrusumab 
is subject to our collaboration agreement with Mereo, and is the lead clinical asset in our bone endocrinology franchise. There are an 
estimated 60,000 patients in the developed world affected by OI.
In February 2023, we announced enrollment was completed in the Phase 2 portion of pediatric and young adult Phase 2/3 study. This 
phase is intended to determine an optimized dose, based on increases in collagen production using serum P1NP levels, and establish an 
acceptable safety profile. Data from the Phase 2 study and determination of the Phase 3 dose strategy are currently expected mid-2023. We 
intend to adapt the study into a pivotal Phase 3 stage, evaluating fracture reduction over an estimated 15 to 24 months as the primary 
endpoint, subject to regulatory review. Separately, we plan to initiate a Phase 2 study of patients under age five with OI in the first half of 
2023.
In February 2023, we and our development partner Mereo entered into a non-exclusive worldwide, royalty-free license with UCB 
Pharma S.A., or UCB, and their partner Amgen Inc., or Amgen, to research, develop, and commercialize setrusumab in OI under certain 
UCB/Amgen-owned patent rights related to anti-sclerostin compounds and their uses.
Please see “—License and Collaboration Agreements—Clinical Product Candidates—Mereo” for a description of our license and 
collaboration agreement with Mereo.
GTX-102 for the treatment of Angelman Syndrome
GTX-102 is an antisense oligonucleotide, or ASO, that is being developed for the treatment of Angelman syndrome, a debilitating and 
rare neurogenetic disorder caused by loss-of-function of the maternally inherited allele of the UBE3A gene. There are an estimated 60,000 
patients in the developed world affected by Angelman syndrome. GTX-102 has received Fast Track Designation, Orphan Drug Designation 
and Rare Pediatric Disease Designation from the FDA. We exercised our option to acquire GeneTx Biotherapeutics LLC (GeneTx) in July 
2022 for an option exercise price of $75.0 million, in addition to outstanding cash and adjustments for working capital, for a total purchase 
consideration of $91.2 million. Additionally, we may make future milestone and royalty payments to GeneTx.
In July 2022, we provided an interim data update on patients treated in Canada, the U.K., and the U.S. under each region’s amended 
protocol for the phase 1/2 study of GTX-102. As of the data cut-off for this update, a total of 11 patients had reached at least the Day 128 
evaluation, with three patients reaching the Day 170 Pre-Maintenance Dose, or PMD, evaluation. We evaluated patients across various 
clinical measurements, including AS Change Scale, AS Severity Scale, the Bayley Scales of Infant and Toddler Development, or Bayley-4, 
the Vineland-3 adaptive behavior scale, and the Observed Reported Communication Ability, or ORCA.
In January 2023, we announced 23 patients had received loading doses ranging from 2 mg to 10 mg, with maintenance dosing ranging 
from 10 mg to 14 mg. Ten patients have had between six and twelve months of exposure to GTX-102 and five patients have been on 
continuous therapy for more than one year. To date, the most common adverse events, or AE, have not been related to treatment and 
include COVID-19 infection, vomiting and upper respiratory infection. In January 2023, we disclosed one AE of special interest that occurred 
in a 17 year-old patient with severe scoliosis and who had, at baseline, limited ability to walk and was primarily dependent on a wheelchair. 
After the fourth monthly loading dose this patient experienced decreased ambulation, which clinically resolved within a couple of weeks. As of 
this filing, there have been no other cases of lower extremity weakness under the amended protocol.
Three of the original five patients treated in the U.S. have successfully restarted therapy with GTX-102. Two of these patients are being 
treated under the Canadian protocol and one through an early access protocol in the U.S. These patients have showed 
8
 
 
 
signs of clinical activity, including improvements in sleep. As of this filing, there have been no reports of lower extremity weakness in these 
three patients.
In the U.K. and Canada, dosing is ongoing under a protocol amendment approved in May 2022 that began with lower loading doses 
and has progressed to incrementally higher loading doses based on age and clinical activity. In the U.S., discussions are currently ongoing 
with the FDA to harmonize the three regions.
In February 2023, screening began for patients in expansion Cohort A (ages 4 to <8 years) and expansion Cohort B (ages 8 to <18 
years). Each expansion cohort will enroll approximately 20 patients and will evaluate the same safety, pharmacokinetic, and efficacy 
measures as the dose escalating cohorts. 
Across the patients who have been dosed under the amended and expanded access protocols, we are continuing to see encouraging 
signs of clinical activity. We expect to provide the next data update, based on a larger number of patients in the program, later this year.
UX111 for the treatment of Sanfilippo syndrome type A or MPS IIIA
UX111 (formerly ABO-102) is an adeno-associated virus 9, or AAV9, gene therapy product candidate for the treatment of patients with 
Sanfilippo syndrome type A, or MPS IIIA, a rare lysosomal storage disease with no approved treatment, which primarily affects the central 
nervous system. There are an estimated 3,000 to 5,000 patients in the developed world affected by Sanfilippo syndrome type A. The UX111 
program has received Regenerative Medicine Advanced Therapy, or RMAT, Fast Track, Rare Pediatric Disease, and Orphan Drug 
Designations in the U.S., and PRIME and Orphan Medicinal Product designations in the EU.
In May 2022, we announced an exclusive license agreement with Abeona Therapeutics for UX111. Under the terms of the agreement, 
we assumed responsibility for the UX111 program in exchange for Abeona’s right to receive tiered royalties of up to 10% on net sales, and 
milestone payments upon the attainment of certain commercial revenue milestones.
Abeona previously announced the completion of a successful Type B meeting with the FDA regarding the pivotal Transpher A trial to 
support filing and approval for UX111. Interim results from the Transpher A trial presented in an encore presentation at the 2022 American 
Society of Gene & Cell Therapy, or ASGCT, conference demonstrated that neurocognitive development was preserved in children treated 
younger than 2 years or in children older than 2 years with a development quotient (DQ) > 60 (n=10) within normal range of a non-afflicted 
child after treatment with ABO-102 (3.0 x 10^13 vg/kg). The interim results also showed continued or stabilized cognitive function along with 
behavioral and developmental progress using standard assessments. Additionally, stabilization or increase in volumes of cortical gray matter, 
total cerebral, and amygdala was observed. Statistically significant reduction in liver volume was seen with UX111 treatment. Dose-
dependent and statistically significant reductions in cerebrospinal fluid and plasma heparan sulfate, demonstrating replacement of enzyme 
activity consistent with levels required for disease correction in the central nervous system, have been sustained in treated patients for two 
years after treatment. As of the ASGCT presentation, there had been no treatment-related serious adverse events and no clinically 
meaningful adverse events.
A meeting with the FDA to discuss a plan to file for accelerated approval is expected to occur in the first half of 2023.
DTX401 for the treatment of glycogen storage disease type Ia, or GSDIa
DTX401 is an adeno-associated virus 8, or AAV8, gene therapy clinical candidate for the treatment of patients with glycogen storage 
disease type Ia, or GSDIa, a disease that arises from a defect in G6Pase, an essential enzyme in glycogen and glucose metabolism. GSDIa 
is the most common genetically inherited glycogen storage disease, with an estimated 6,000 patients in the developed world affected by 
GSDIa. A Pediatric Investigation Plan, or PIP, was accepted by the EMA. The DTX401 program has received RMAT, Fast Track, and Orphan 
Drug designations in the U.S., and PRIME and Orphan Medicinal Product Designations in the EU.
In May 2022, we presented longer-term safety and durability data from the ongoing Phase 1/2 study at the ASGCT conference, which 
showed sustained responses lasting more than 3.5 years following treatment with DTX401. All 12 patients in the study have demonstrated 
reductions in oral glucose replacement therapy, with a mean total daily reduction of 70% (p-value<0.0001) from baseline to the last available 
timepoint. At the ASGCT presentation, we also presented data that showed additional improvements of greater time spent in euglycemia and 
reduced average daily cornstarch intake, as measured by continuous glucose monitoring.
As of January 2023, enrollment in the baseline screening has been completed in the Phase 3 GlucoGene study of DTX401. The Phase 
3 study has a 48-week primary efficacy analysis period and enrolled approximately 50 patients eight years of age and older, randomized 1:1 
to DTX401 (1.0 x 10^13 GC/kg dose) or placebo. The primary endpoint is the reduction in oral glucose replacement with cornstarch while 
maintaining glucose control. We currently expect to share results from this Phase 3 study, following the 48-week primary efficacy analysis, in 
the first half of 2024.
Please see “—License and Collaboration Agreements—Clinical Product Candidates—REGENXBIO Inc.” for a description of our 
license agreement with REGENXBIO Inc.
9
 
DTX301 for the treatment of ornithine transcarbamylase, or OTC, deficiency 
DTX301 is an AAV8 gene therapy product candidate designed for the treatment of patients with ornithine transcarbamylase, or OTC, 
deficiency. OTC is part of the urea cycle, an enzymatic pathway in the liver that converts excess nitrogen, in the form of ammonia, to urea for 
excretion. OTC deficiency is the most common urea cycle disorder, and there are approximately 10,000 patients in the developed world with 
OTC deficiency, of which we estimate approximately 80% are classified as late-onset, our target population. DTX301 has received Orphan 
Drug Designation in both the U.S. and in the EU and Fast Track Designation in the U.S.
In May 2022, we presented additional longer-term safety and durability data from the ongoing Phase 1/2 study at the 2022 ASGCT 
conference, which showed sustained responses lasting more than 4 years following treatment with DTX301. Seven of 11 patients, including 
four out of the five patients treated at the Phase 3 dose (1.7 x 10^13 GC/kg), have responded, and remain clinically and metabolically stable. 
Four complete responders have discontinued ammonia-scavenger medications and liberalized their diet within the first year after treatment. 
As of May 2022, across all cohorts of the Phase 1/2 study, no treatment-related serious adverse events, infusion-associated reactions or 
dose-limiting toxicities have been reported.
The Phase 3 Enh3ance study randomized and dosed the first patient earlier this year. Additional patients are currently in the 
approximate 4- to 8-week baseline screening period, after which they are expected to receive a single dose of DTX301 or placebo. The 
Phase 3 study will include a 64-week primary efficacy analysis period and we currently plan to enroll approximately 50 patients 12 years of 
age and older, randomized 1:1 to DTX301 (1.7 x 10^13 GC/kg dose) or placebo. The co-primary endpoints are the percentage of patients 
who achieve a response, as measured by discontinuation or reduction in baseline disease management, and the 24-hour plasma ammonia 
levels.
Please see “—License and Collaboration Agreements—Clinical Product Candidates—REGENXBIO Inc.” for a description of our 
license agreement with REGENXBIO Inc.
UX701 for the treatment of Wilson Disease
UX701 is an AAV type 9 gene therapy product candidate designed to deliver stable expression of a truncated version of the ATP7B 
copper transporter following a single intravenous infusion to patients with Wilson disease. It is estimated that Wilson disease affects more 
than 50,000 individuals in the developed world. UX701 has received Orphan Drug Designation in the U.S. and in the EU.
UX701 has received a Fast Track Designation from the FDA. This will allow for early and frequent communication throughout the entire 
drug development and review process and reflects the serious, unmet need for patients with Wilson disease.
We are currently enrolling and dosing patients with Wilson disease in the first stage of the Cyprus2+ study of UX701. During the first 
stage, the safety and efficacy of up to three dose levels of UX701 will be evaluated over the course of 52 weeks and a dose will be selected 
for further evaluation in stage 2. The sequential doses to be evaluated are 5.0 x 10^12 GC/kg, 1.0 x 10^13 GC/kg, and 2.0 x 10^13 GC/kg. A 
protocol amendment for stage 1 has been approved that removes the use of placebo from this stage of the study. In stage 2, a new cohort of 
patients will be randomized 2:1 to receive the selected dose of UX701 or placebo. The primary safety and efficacy analyses will be 
conducted at Week 52 of stage 2. The primary efficacy endpoints are change in 24-hour urinary copper concentration and percent reduction 
in standard of care medication by Week 52. After the initial 52-week study period, we expect that all patients will receive long term follow up 
in stage 3.
Completion of Stage 1 enrollment is expected in mid-2023 with data on safety and potentially initial signs of clinical activity expected in 
early 2024.
Please see “—License and Collaboration Agreements—Clinical Product Candidates— REGENXBIO Inc.” for a description of our 
license and collaboration agreement with REGENXBIO Inc.
UX053 for the treatment of glycogen storage disease type III, or GSDIII 
UX053 is an mRNA product candidate designed for the treatment of patients with GSDIII, a disease caused by a glycogen debranching 
enzyme, or AGL, deficiency that results in glycogen accumulation in the liver and muscle. UX053 has received Orphan Drug Designation in 
the U.S. and in the EU.
Dosing in the single ascending dose stage of the Phase 1/2 study of UX053 for the treatment of GSDIII has been completed and we 
expect to have this data in the first half of 2023. Based on these analyses and other work, we will then review our plans for the next steps in 
the program.
Please see “—License and Collaboration Agreements—Clinical Product Candidates—Arcturus” for a description of our collaboration 
agreement with Arcturus.
10
 
Competition 
 In the case of indications that we are targeting, it is possible that other companies may produce, develop, and commercialize 
compounds that might treat these diseases.
With respect to Crysvita, although we are not aware of any other products currently in clinical development for the treatment of XLH 
and TIO, it is possible that competitors may produce, develop, and commercialize therapeutics, or utilize other approaches such as gene 
therapy, to treat XLH and TIO. Most pediatric patients with XLH are managed using oral phosphate replacement and/or vitamin D therapy, 
which is relatively inexpensive and therefore may adversely affect our ability to commercialize Crysvita, if approved, in some countries. 
With respect to Mepsevii, we are not aware of any other compounds currently in clinical development for MPS VII, but it is possible that 
other companies may produce, develop, and commercialize compounds that might treat this disease. Additionally, gene therapy and other 
therapeutic approaches may emerge for the treatment of lysosomal diseases. Bone marrow or stem cell transplants have also been used in 
MPS VII and in other lysosomal storage diseases and represent a potential competing therapy. Stem cell transplants have been effective in 
treating soft tissue storage and in having an impact on brain disease, but have not to date proven effective in treating bone and connective 
tissue disease. Typically, enzyme replacement therapy has had an impact on bone and connective tissue disease in other disorders when 
patients were treated early. 
With respect to Dojolvi, LC-FAOD is commonly treated with diet therapy and MCT oil. Dojolvi may compete with this approach. 
Although we believe that Dojolvi should be considered a drug and will be regulated that way, it is possible that other companies or individuals 
may attempt to produce triheptanoin for use in LC-FAOD. Investigators are testing triheptanoin in clinical studies across multiple indications, 
including LC-FAOD. It is also possible that other companies may produce, develop, and commercialize other medium odd-chain fatty acids, 
or completely different compounds, to treat LC-FAOD. Other companies may also utilize other approaches, such as gene therapy, to treat 
LC-FAOD. In addition, Reneo Pharmaceuticals is developing REN001, a PPAR delta agonist, in Phase 1b for LC-FAOD and other genetic 
myopathies.
With respect to Evkeeza, the current treatments for patients with HoFH involve various lipid-lowering agents to reduce serum LDL and 
total cholesterol levels. Drug therapies include statins (e.g., Rosuvastatin, Simvastatin, etc.), fenofibrate, ezetimibe (Ezetrol), evolocumab 
(Repatha), and lomitapide (Juxtapid/Lojuxta). Other than lomitapide, these agents rely on an LDL-receptor based mechanism to reduce 
cholesterol, which may be absent in HoFH patients, particularly those with LDLR-null mutations. In addition, Arrowhead Pharmaceuticals is 
developing ARO-ANG3 and Eli Lilly/Dicerna is developing LY3561774, both RNAi-based inhibitors of ANGPTL3 in Phase 2 studies across 
various indications including HoFH.
With respect to DTX401, there are currently no pharmacologic treatments for patients with GSDIa. We are aware of an mRNA therapy, 
mRNA-3745, in Phase 1 for GSDIa by Moderna.
With respect to DTX301, the current treatments for patients with OTC deficiency are nitrogen scavenging drugs and severe limitations 
in dietary protein. Drug therapy includes sodium phenylbutyrate (Buphenyl) and glycerol phenylbutyrate (Ravicti), both nitrogen scavengers 
that help eliminate excess nitrogen, in the form of ammonia, by facilitating its excretion. A novel formulation of sodium phenylbutyrate, ACER-
001 by Acer Therapeutics, was approved in December 2022. During a metabolic crisis, patients routinely receive carbohydrate and lipid rich 
nutrition, including overnight feeding through a nasogastric tube, to limit bodily protein breakdown and ammonia production. In acute cases, 
ammonia must be removed by dialysis or hemofiltration. Liver transplant may also be a solution for OTC deficiency. In addition, Arcturus 
Therapeutics is developing ARCT-810, a messenger RNA therapy, in Phase 2 for OTC deficiency. 
With respect to GTX-102, there are currently no approved drugs for Angelman syndrome. Many patients take general treatments to try 
to manage specific symptoms, such as seizures or sleep disturbances, but there are no treatments available that address the underlying 
biology of the disease. We are aware of other ASOs in preclinical and clinical development for Angelman syndrome, including programs from 
Roche and Biogen in collaboration with Ionis in Phase 1 studies, as well as preclinical gene therapy programs. In addition, Neuren 
Pharmaceuticals is developing NNZ-2591, an IGF-1 analog, in Phase 2 for Angelman syndrome.
With respect to UX701, there are no currently approved treatments that address the underlying cause of Wilson disease. Many 
patients are on chelator therapies, but these fail to address the mutated ATP7B copper transporter gene. We are aware of another gene 
therapy, VTX-801, that is in Phase 1 for Wilson disease by Vivet Therapeutics, in collaboration with Pfizer. In addition, Alexion is developing 
ALXN1840, a copper chelator in Phase 3. 
With respect to UX143, there are currently no approved drugs for osteogenesis imperfecta. Most pediatric patients with osteogenesis 
imperfecta are managed with off-label use of bisphosphonates to increase bone density and reduce frequency of bone fracture. We are 
aware of another anti-sclerostin antibody, romosozumab, that is in Phase 1 clinical testing by Amgen. In addition, two anti-TGFβ antibodies, 
fresolimumab and SAR439459, are in Phase 1 clinical testing by Sanofi-Genzyme.
11
 
With respect to UX053, there are currently no pharmacologic treatments for patients with GSD III and we are not aware of any 
programs in clinical development.
With respect to UX111, there are currently no approved pharmacologic treatments for patients with MPS IIIA. Patients receive 
supportive or symptomatic treatment, but these approaches generally do not prevent functional decline. We are aware of other gene 
therapies, including LYS-SAF302, in Phase 2/3 for MPSIIIA by Lysogene, and EGT-101, in Phase 1/2 for MPSIIIA by Esteve. In addition, 
Orchard Therapeutics is developing OTL-201, an ex-vivo gene therapy in Phase 1/2 for MPSIIIA.
License and Collaboration Agreements 
Our products and some of our current product candidates have been either in-licensed from academic institutions or derived from 
partnerships with other pharmaceutical companies. Following is a description of our significant license and collaboration agreements.
Approved Products
Kyowa Kirin Co., Ltd.
In August 2013, we entered into a collaboration and license agreement with KKC. Under the terms of this collaboration and license 
agreement, as amended, we and KKC collaborate on the development and commercialization of Crysvita in the field of orphan diseases in 
the U.S. and Canada, or the profit-share territory, and in the EU, U.K., and Switzerland, or the European territory, and we have the right to 
develop and commercialize such products in the field of orphan diseases in Mexico and Central and South America, or Latin America. In the 
field of orphan diseases, and except for ongoing studies being conducted by KKC, we are the lead party for development activities in the 
profit-share territory and in the European territory until the applicable transition date. We share the costs for development activities in the 
profit-share territory and the European territory conducted pursuant to the development plan before the applicable transition date equally with 
KKC. In April 2023, which is the transition date for the profit-share territory, KKC will become the lead party and be responsible for the costs 
of the development activities. However, we will continue to share the costs of the studies commenced prior to the applicable transition date 
equally with KKC. Crysvita was approved in the EU and U.K. in February 2018 and was approved by the FDA in April 2018. As described 
below, we and KKC share commercial responsibilities and profits in the profit-share territory until April 2023, KKC has the commercial 
responsibility in the European territory, and we are responsible for commercializing burosumab in Latin America. 
In the profit-share territory, KKC books sales of products and we have the sole right to promote the products, with KKC having the right 
to increasingly participate in the promotion of the products until the transition date of April 2023, which is five years from commercial launch. 
In September 2022, we entered into an amendment to the collaboration agreement which clarified the scope of increased participation by 
KKC in support of our commercial activities prior to April 2023 and granted us the right to continue to support KKC in commercial field 
activities in the U.S. through April 2024, subject to the limitations and conditions set forth in the amendment. As a result, KKC will continue to 
support our commercial field and marketing efforts through a cost share arrangement through April 2024, subject to the limits and conditions 
set forth in the amendment. After April 2024, our rights to promote Crysvita in the U.S. will be limited to medical geneticists and we will solely 
bear our expenses related to the promotion of Crysvita in the profit-share territory. See “Item I.A. Risk Factors” for additional information on 
the risks related to the expiration of our exclusive right to promote Crysvita in the profit-share territory. In the European territory, KKC books 
sales of products and has the sole right to promote and sell the products, with the exception of Turkey. In Turkey, we have rights to 
commercialize Crysvita and KKC has the option to assume responsibility for such commercialization efforts, after a certain minimum period. 
In Latin America, we book sales of products and have the sole right to promote and sell the products. 
KKC manufactures and supplies all quantities of product for clinical studies. KKC also supplies all quantities of product for commercial 
sales in the profit-share territory and in Latin America. The supply price in the profit-share territory and Latin America is 35% of the net sales 
price through December 31, 2022 and 30% thereafter. 
The remaining profit or loss from commercializing products in the profit-share territory is shared between us and KKC on a 50/50 basis 
until April 2023. Thereafter, we will be entitled to receive a tiered double-digit revenue share in the mid- to high 20% range in the profit-share 
territory, intended to approximate the profit-share. In July 2022, we sold to OCM LS23 Holdings LP, an investment vehicle for the Ontario 
Municipal Employees Retirement System, or OMERS, our right to receive 30% of the future royalty payments due to us based on net sales of 
Crysvita in the U.S. and Canada, subject to a cap, beginning in April 2023. KKC pays us a royalty of up to 10% based on net sales in the 
European territory. We sold our interest in the European territory royalty to RPI Finance Trust, an affiliate of Royalty Pharma, in December 
2019. In Latin America, we pay to KKC a low single-digit royalty on net sales. Our and KKC’s obligations to pay royalties will continue on a 
country-by-country basis for so long as we or KKC, as applicable, are selling products in such country. 
12
 
The collaboration and license agreement will continue for as long as products in the field of orphan diseases are sold in the profit-
share territory, European territory, Turkey, or Latin America, unless the agreement is terminated in accordance with its terms. 
KKC may terminate the agreement in certain countries or territories based upon our failure to meet certain milestones. Furthermore, 
either party may terminate the agreement for the material breach or bankruptcy of the other party. In any event of termination by KKC, unless 
such termination is the result of KKC’s termination for certain types of breach of the agreement by us, we may receive low single-digit to low 
double-digit royalties on net post-termination sales by KKC in one or more countries or territories, the amount of which varies depending on 
the timing of, and reason for, such termination. In any event of termination, our rights to Crysvita under the agreement and our obligations to 
share development costs will cease, and the program will revert to KKC, worldwide if the agreement is terminated as a whole or solely in the 
terminated countries if the agreement is terminated solely with respect to certain countries. 
Saint Louis University 
In November 2010, we entered into a license agreement with Saint Louis University, or SLU, wherein SLU granted us certain exclusive 
rights to intellectual property related to Mepsevii. Under the terms of the license agreement, SLU granted us an exclusive worldwide license 
to make, have made, use, import, offer for sale, and sell therapeutics related to SLU’s beta-glucuronidase product for use in the treatment of 
human diseases. 
Under the license agreement, we are obligated to pay to SLU a low single-digit royalty on net sales of the licensed products in the 
U.S., Europe, or Japan, subject to certain potential deductions. Our obligation to pay royalties to SLU in these territories continues until the 
expiration of any orphan drug exclusivity. We may terminate the agreement for convenience at any time and SLU may terminate the 
agreement for our material breach, bankruptcy, or challenge of the licensed technology, and SLU may terminate the agreement or render our 
license non-exclusive if we fail to meet our diligence obligations. Unless terminated as set forth above, this license agreement continues in 
full force and effect until the latest expiration of any orphan drug exclusivity in the U.S., Europe, or Japan, at which point our license becomes 
fully paid.
Baylor Research Institute 
In September 2012, we entered into a license agreement, which was subsequently amended, with Baylor Research Institute, or BRI, 
under which we exclusively licensed certain intellectual property related to Dojolvi. The license includes patents, patent applications, know-
how, and intellectual property related to the composition and formulation of Dojolvi as well as its use in treating a number of orphan diseases, 
including LC-FAOD. The license grant includes the sole right to develop, manufacture, and commercialize licensed products for all human 
and animal uses. Under the license agreement, we are obligated to use commercially reasonable efforts to develop and commercialize 
licensed products in select orphan indications. If we fail to meet our diligence obligations with respect to a specified orphan indication or set 
of orphan indications, BRI may convert our license to a non-exclusive license with respect to such orphan indication or set of orphan 
indications until we receive regulatory approval for licensed products in the applicable orphan indication or set of orphan indications. 
We are also obligated to pay a mid- single-digit royalty on net sales to BRI, subject to certain reductions and offsets. Our obligation to 
pay royalties to BRI continues on a licensed product-by-licensed product and country-by-country basis until the later of the expiration of the 
first regulatory exclusivity granted with respect to such product in such country or the expiration of the last-to-expire licensed patent claiming 
such product in such country, in each case in connection with approval in such country for LC-FAOD or an orphan disease covered by our 
license from BRI. During the year ended December 31, 2022, the sales milestone triggering a $2.5 million payment was achieved. Going 
forward, we may make future payments of up to $2.5 million contingent upon attainment of certain development milestones and $5.0 million if 
certain sales milestones are achieved. 
We may terminate the agreement for convenience at any time and either we or BRI may terminate the agreement for the material 
breach or bankruptcy of the other party. If we terminate for BRI’s breach or bankruptcy, our license from BRI will remain in effect, subject to 
our continued payment of reduced milestones and royalties. Unless terminated by its terms, this license agreement continues in full force and 
effect, on a product-by-product and country-by-country basis, until our royalty obligations expire, at which point our license from BRI with 
respect to such product in such country becomes irrevocable, perpetual, fully paid and royalty-free.
Regeneron
In January 2022, we announced a collaboration with Regeneron to commercialize Evkeeza for HoFH outside of the U.S. Evkeeza is 
approved in the U.S., where it is marketed by Regeneron, and in the EU and U.K. as a first-in-class therapy for use together with diet and 
other low-density lipoprotein-cholesterol-lowering therapies to treat adults and adolescents aged 12 years and older with HoFH. Pursuant to 
the terms of the agreement, we received the rights to develop, commercialize and distribute the product for 
13
 
HoFH in countries outside of the U.S. Upon closing of the transaction in January 2022, we paid Regeneron a $30.0 million upfront payment. 
We are obligated to pay Regeneron up to $63.0 million in future milestone payments, contingent upon the achievement of certain regulatory 
and sales milestones. We may share in certain costs for global trials led by Regeneron and also received the right to opt into other potential 
indications, including a right to negotiate a separate agreement with Regeneron to collaborate on the Regeneron’s investigational antibody 
for the treatment of fibrodysplasia ossificans progressiva, or FOP, which expired in July 2022.
Clinical Product Candidates
REGENXBIO Inc.
In October 2013, we entered into an exclusive license agreement with REGENXBIO Inc., or REGENX, under which we were granted 
an option to develop products to treat hemophilia A, OTC deficiency and GSDIa. Under the 2013 license agreement, REGENX granted us an 
exclusive worldwide license to make, have made, use, import, sell, and offer for sale licensed products with respect to such disease 
indications, subject to certain exclusions. We do not have the right to control prosecution of the in-licensed patent applications, and our rights 
to enforce the in-licensed patents are subject to certain limitations. Under the 2013 license agreement, we pay or will pay REGENX an 
annual maintenance fee and certain milestone fees per disease indication, low to mid- single-digit royalty percentages on net sales of 
licensed products, and milestone and sublicense fees, if any, owed by REGENX to its licensors as a result of our activities under the 2013 
license agreement. We are required to develop licensed products in accordance with certain milestones. In the event that we fail to meet a 
particular milestone within established deadlines, we can extend the relevant deadline by providing a separate payment to REGENX. The 
2013 license agreement will expire upon the expiration, lapse, abandonment, or invalidation of the last claim of the licensed intellectual 
property to expire, lapse, or become abandoned or unenforceable in all the countries of the world. Upon expiration, our know-how license will 
become non-exclusive, perpetual, irrevocable and royalty-free with respect to licensed know-how that REGENX owns in the field and will 
continue with respect to all of REGENX’s other know-how in the field under certain of its licenses for so long as its rights from those licensors 
continue. Subject to certain obligations to Bayer Healthcare, LLC, or Bayer, we may terminate the 2013 license agreement upon prior written 
notice or for a material breach. REGENX may terminate the license agreement if we or our controlling affiliate become insolvent, are late in 
paying money due, commence certain actions relating to the licensed patents or materially breach the agreement. If the 2013 license 
agreement is terminated with respect to an indication, we grant certain rights to REGENX, including transferring ownership of any applicable 
regulatory approvals and granting an exclusive license under certain of our intellectual property for use with respect to products covered by 
the intellectual property we had licensed from REGENX in that indication.
In March 2015, we entered into an option and license agreement with REGENX, which was subsequently amended, pursuant to which 
we have an exclusive worldwide license to make, have made, use, import, sell, and offer for sale licensed products to treat Wilson disease 
and CDKL5 deficiency. We do not have the right to control prosecution of the in-licensed patent applications, and our rights to enforce the in-
licensed patents are subject to certain limitations. Under the 2015 option and license agreement, as amended, we pay or will pay REGENX 
an annual maintenance fee and certain milestone fees per disease indication, mid- to high single-digit royalty percentages on net sales of 
licensed products, and mid- single to low double-digit percentages of any sublicense fees we receive from sublicenses for the licensed 
intellectual property rights. We are required to develop licensed products in accordance with certain milestones. In the event that we fail to 
meet a particular milestone within established deadlines, we can extend the relevant deadline by providing a separate payment to REGENX. 
The 2015 option and license agreement will expire upon the expiration of the royalty obligations with respect to all licensed products for all 
licensed indications under all licenses granted under all exercised commercial options. Upon expiration, our know-how license will become 
non-exclusive, perpetual, irrevocable and royalty-free with respect to licensed know-how that REGENX owns in the field and will continue 
with respect to all of REGENX’s other know-how in the field under certain of its licenses for so long as its rights from those licensors 
continue. We may terminate the 2015 option and license agreement upon prior written notice or for a material breach. REGENX may 
terminate the 2015 option and license agreement if we or our controlling affiliate become insolvent, are late in paying money due, commence 
certain actions relating to the licensed patents or materially breach the agreement. If the 2015 option and license agreement is terminated 
with respect to an indication, we grant certain rights to REGENX, including transferring ownership of any applicable regulatory approvals and 
granting an exclusive license under certain of our intellectual property for use with respect to products covered by the intellectual property we 
had licensed from REGENX in that indication.
In March 2020, we entered into a license agreement with REGENX, for an exclusive, sublicensable, worldwide license to REGENX’s 
NAV AAV8 and AAV9 vectors for the development and commercialization of gene therapy treatments for a rare metabolic disorder. In return 
for these rights, we made an upfront payment and pay or will pay certain annual fees, milestone payments and royalties on any net sales of 
products incorporating the licensed intellectual property that range from a high single-digit to low double-digit.
14
 
Bayer
In June 2014, we entered into an agreement with Bayer to research, develop and commercialize AAV gene therapy products for the 
treatment of hemophilia A, which was amended and restated in June 2019, or the Collaboration and License Agreement for DTX201. Under 
this agreement, we granted Bayer an exclusive license to develop and commercialize one or more novel gene therapies for hemophilia. In 
October 2022, the Collaboration and License Agreement for DTX201 with Bayer was terminated and all licensed rights to DTX201 have 
reverted to us. We also obtained rights to all necessary data and information to further develop DTX201 or another hemophilia A program 
through a royalty-free, worldwide, sublicensable, perpetual license. We plan to continue development while seeking a collaboration partner 
for this program.
University of Pennsylvania
In January 2015, we entered into an agreement with the University of Pennsylvania to sponsor certain research of Dr. Wilson at 
University of Pennsylvania School of Medicine related to liver gene therapy and hemophilia. Under the agreement, the University of 
Pennsylvania granted us an option to obtain a worldwide, non-exclusive or exclusive, royalty-bearing license, with the right to sublicense, 
under certain patent rights conceived, created or reduced to practice in the conduct of the research. The agreement expired on December 
31, 2021. 
In May 2016, we entered into a research, collaboration and license agreement with the University of Pennsylvania under which we are 
collaborating on the pre-clinical development of gene therapy products for the treatment of phenylketonuria and Wilson disease, each, a 
Subfield. Under the agreement, we were granted an exclusive, worldwide, royalty-bearing right and license to certain patent rights arising out 
of the research program, and a non-exclusive, worldwide, royalty-bearing right and license to certain University of Pennsylvania intellectual 
property, in each case to research, develop, make, have made, use, sell, offer for sale, commercialize and import licensed products in each 
Subfield for the term of the agreement. We will fund the cost of the research program and will be responsible for clinical development, 
manufacturing and commercialization of each Subfield. In addition, we are required to make milestone payments (up to a maximum of $5.0 
million per Subfield) if certain development milestones are achieved over time. We will also make milestone payments of up to $25.0 million 
per approved product, if certain commercial milestones are achieved, and will pay low to mid- single-digit royalties on net sales of each 
Subfield’s licensed products.
GeneTx
In August 2019, we entered into an agreement with GeneTx to collaborate on the development of GeneTx’s GTX-102. Under the terms 
of the agreement, we made an upfront payment of $20.0 million which included an exclusive option to acquire GeneTx. In February 2020, we 
paid $25.0 million following acceptance of the IND to maintain the option to acquire GeneTx until the earlier of 30 months from the first dosing 
of a patient in a planned Phase 1/2 study (subject to extensions) or 90 days after results are available from that study. 
 In July 2022, we exercised our option to acquire GeneTx and entered into a Unit Purchase Agreement, or the Purchase Agreement, 
pursuant to which we purchased all the outstanding units of GeneTx. In accordance with the terms of the Purchase Agreement, we exercised 
our option to acquire GeneTx Biotherapeutics LLC (GeneTx) for an option exercise price of $75.0 million, in addition to outstanding cash and 
adjustments for working capital, for a total purchase consideration of $91.2 million. We are obligated to make future payments of up to $190.0 
million upon the achievement of certain milestones, including up to $30.0 million in milestone payments upon achievement of the earlier of 
initiation of a Phase 3 clinical study or product approvals in Canada and the U.K., up to $85.0 million in additional regulatory approval 
milestones for the achievement of U.S. and EU product approvals, and up to $75.0 million in commercial milestone payments based on 
annual worldwide net product sales. In addition, we are obligated to pay tiered mid- to high single-digit percentage royalties based on 
licensed product annual net sales. If we receive and resell an FDA priority review voucher, or PRV, in connection with a new drug application 
approval, GeneTx is entitled to receive a portion of proceeds from the sale of the PRV or a cash payment from us, if we choose to retain the 
PRV.
15
 
Mereo
In December 2020, we entered into a License and Collaboration Agreement with Mereo to collaborate on the development of 
setrusumab. Under the terms of the agreement, we will lead future global development of setrusumab in both pediatric and adult patients with 
OI and were granted an exclusive license to develop and commercialize setrusumab in the U.S., Turkey, and the rest of the world, excluding 
the European Economic Area, United Kingdom, and Switzerland, or the Mereo Territory, where Mereo retains commercial rights. Each party 
will be responsible for post-marketing commitments and commercial supply in their respective territories.
Upon the closing of the transactions under the License and Collaboration Agreement with Mereo in January 2021, we made a payment 
of $50.0 million to Mereo and will be required to make payments of up to $254.0 million upon the achievement of certain clinical, regulatory, 
and commercial milestones. We will pay for all global development costs as well as tiered double-digit percentage royalties to Mereo on net 
sales in the U.S., Turkey, and the rest of the world, and Mereo will pay us a fixed double-digit percentage royalty on net sales in the Mereo 
Territory.
Abeona 
In May 2022, we announced an exclusive License Agreement with Abeona for an AAV gene therapy for the treatment of MPS IIIA, or 
UX111. Under the terms of the agreement, we assumed responsibility for the UX111 program and in return, we are obligated to pay Abeona 
certain UX111-related prior development costs and other transition costs. Abeona is eligible to receive tiered royalties of up to 10% on net 
sales and commercial milestone payments of up to $30.0 million following regulatory approval of the product. Additionally, we entered into an 
Assignment and Assumption Agreement with Abeona to transfer and assign to us the exclusive license agreement between Nationwide 
Children’s Hospital, or NCH, and Abeona for certain rights related to UX111. Under this agreement, NCH is eligible to receive from us up to 
$1.0 million in development and regulatory milestones as well as royalties in the low single-digits of net sales. 
Arcturus 
In October 2015, we entered into a Research Collaboration and License Agreement with Arcturus Therapeutics Holdings Inc., or 
Arcturus, to develop mRNA therapeutics for select rare disease targets. As part of the collaboration, we may use Arcturus’ LUNAR® 
nanoparticle delivery platform to develop mRNA therapeutics for the treatment of various rare disease targets, subject to certain exclusions 
and restrictions. 
In June 2019, we announced the expansion of our research and collaboration arrangement with Arcturus, to discover and develop 
mRNA, DNA and siRNA therapeutics for up to 12 rare disease targets pursuant to the terms of an amendment to the 2015 Research 
Collaboration and License Agreement, or 2015 license agreement, and equity purchase agreement. In connection with the amendment to the 
2015 license agreement, we made a $6.0 million cash upfront payment to Arcturus and also purchased 2,400,000 shares of Arcturus’ 
common stock at a stated value of $10.00 per share. In May 2020, we exercised an option to purchase an additional 600,000 shares of 
Arcturus’ common stock at $16.00 per share. During the years ended December 31, 2022 and 2021, we sold 500,000 shares and 1,700,000 
shares of Arcturus common stock, respectively, at a weighted-average price of $20.39 and $47.44, respectively. As of December 31, 2022, 
we held no shares of Arcturus common stock. 
On a product-by-product basis, we are obligated to make development and regulatory milestone payments of up to $24.5 million, and 
commercial milestone payments of up to $45.0 million if certain milestones are achieved. We are also obligated to pay Arcturus royalties on 
any net sales of products incorporating the licensed intellectual property that range from a mid- single-digit to low double-digit percentage.
Preclinical Pipeline 
Solid Biosciences Inc.
In October 2020, we entered into a strategic Collaboration and License Agreement with Solid Biosciences Inc., or Solid, and received 
an exclusive license for any pharmaceutical product that expresses Solid’s proprietary microdystrophin construct from AAV8 and variants 
thereof in clade E for use in the treatment of Duchenne muscular dystrophy and other diseases resulting from lack of functional dystrophin, 
including Becker muscular dystrophy. We are collaborating to develop products that combine Solid’s differentiated microdystrophin construct, 
our Pinnacle PCLTM producer cell line platform, or Pinnacle PCL Platform, manufacturing platform, and our AAV8 variants. Solid may provide 
some development support and was granted an exclusive option to co-invest in products we develop for profit-share participation in certain 
territories. We also entered into a Stock Purchase Agreement with Solid in October 2020 pursuant to which we purchased 7,825,797 shares 
of Solid’s common stock for an aggregate price of $40.0 million. In October 2022, Solid announced a 1 for 15 reverse stock split. After the 
split, we hold 521,719 shares in Solid.
16
 
Platform Technology Transfer 
Daiichi 
In March 2020, we entered into a License and Technology Access Agreement, or the License Agreement with Daiichi Sankyo Co., Ltd., 
or Daiichi Sankyo, pursuant to which, we granted Daiichi Sankyo a non-exclusive license to intellectual property, including know-how and 
patent applications, with respect to our Pinnacle PCL Platform and HEK293 transient transfection manufacturing technology platforms for 
AAV-based gene therapy products. We retained the exclusive right to use the manufacturing technology for our current target indications and 
additional indications identified now and in the future. We are providing certain technical assistance and technology transfer services during 
the technology transfer period of three years to enable Daiichi Sankyo to use the technologies for its internal gene therapy programs. Daiichi 
Sankyo has an option to extend the technology transfer period including know-how improvements by two additional one-year periods by 
paying a fixed amount for each additional year. Daiichi Sankyo will be responsible for the manufacturing, development, and 
commercialization of their products manufactured with the licensed technology; however, we have the option to co-develop and co-
commercialize rare disease products at the IND stage. We may also provide strategic consultation to Daiichi Sankyo on the development of 
both AAV-based gene therapy products and other products for rare diseases. 
Under the terms of the License Agreement, Daiichi Sankyo made an upfront payment of $125.0 million and during the fourth quarter of 
2021, made an additional payment of $25.0 million upon achievement of the milestones related to the technology transfer of the Pinnacle 
PCL and HEK293 platforms. Daiichi Sankyo reimbursed us for all costs associated with the transfer of the manufacturing technology and will 
also pay us a single-digit royalties on net sales of products manufactured with the technology platforms.
In March 2020, we also entered into a Stock Purchase Agreement with Daiichi Sankyo, pursuant to which Daiichi Sankyo purchased 
1,243,913 shares of our common stock in exchange for $75.0 million in cash. Daiichi Sankyo is subject to a three-year standstill and 
restrictions on sale of the shares (subject to customary exceptions or release). 
In June 2020, we executed a subsequent license agreement, or the Sublicense Agreement, with Daiichi Sankyo for transfer of certain 
technology in consideration for a payment of $8.0 million and annual maintenance fees, milestone payments, and royalties on any net sales 
of products incorporating the licensed intellectual property. 
Patents and Proprietary Rights 
The proprietary nature of, and protection for, our products, product candidates, processes, and know-how are important to our 
business. Our success depends in part on our ability to protect our products, product candidates, processes, and know-how, to operate 
without infringing on the proprietary rights of others, and to prevent others from infringing our proprietary rights. We seek patent protection in 
the U.S. and internationally for our products, product candidates, and processes. Our policy is to patent or in-license the technologies, 
inventions, and improvements that we consider important to the development of our business. In addition to patent protection, we rely on 
trade secrets, know-how, and continuing innovation to develop and maintain our competitive position.
We also use other means to protect our products and product candidates, including the pursuit of marketing or data exclusivity periods, 
orphan drug status, and similar rights that are available under regulatory provisions in certain countries, including the U.S., Europe, Japan, 
and China. See “Government Regulation—U.S. Government Regulation — Orphan Designation and Exclusivity,” “Government Regulation—
U.S. Government Regulation — Pediatric Studies and Exclusivity,” “Government Regulation—U.S. Government Regulation — Biosimilars 
and Exclusivity,” “Government Regulation—U.S. Government Regulation — Abbreviated New Drug Applications for Generic Drugs and New 
Chemical Entity Exclusivity,” “Government Regulation—U.S. Government Regulation — Patent Term Restoration,” “Government Regulation
—EU Regulation — Orphan Designation and Exclusivity,” and “Government Regulation—EU Regulation — New Chemical Entity Exclusivity” 
below for additional information. 
We seek regulatory approval for our products and product candidates in disease areas with high unmet medical need, significant 
market potential, and where we expect to have a proprietary position through patents covering various aspects of our product candidates, 
such as composition, dosage, formulation, use, and manufacturing process, among others. Our success depends in part on an intellectual 
property portfolio that supports our future revenue streams and erects barriers to our competitors. We are maintaining and building our patent 
portfolio by filing new patent applications, prosecuting existing applications, and licensing and acquiring new patents and patent applications. 
17
 
Despite these measures, any of our intellectual property and proprietary rights could be challenged, invalidated, circumvented, 
infringed, or misappropriated, or such intellectual property and proprietary rights may not be sufficient to achieve or maintain market 
exclusivity or otherwise to provide competitive advantages. We also cannot be certain that patents will be granted with respect to any of our 
pending patent applications or with respect to any patent applications filed by us in the future, nor can we be sure that any of our existing 
patents or any patents granted to us in the future will be commercially useful in protecting our products, product candidates, or processes. 
For more information, please see “Item I.A. Risk Factors Risks Related to Our Intellectual Property.”
As of December 31, 2022, we own, jointly own, or have exclusive rights to more than 225 issued and in-force patents (not including 
individually validated national patents in European Patent Convention member countries) that cover one or more of our products or product 
candidates, methods of their use, or methods of their manufacture, including more than 45 in-force patents issued by the U.S. Patent and 
Trademark Office, or the USPTO. Furthermore, as of December 31, 2022, we own, jointly own, or have exclusive rights to more than 375 
pending patent applications, including more than 50 pending U.S. applications. 
With respect to our owned or in-licensed issued patents in the U.S. and Europe, we may be entitled to obtain an extension of patent 
term to extend the patent expiration date. For example, in the U.S., this extended coverage period is known as patent term extension, or 
PTE, and can only be obtained provided we apply for and receive a marketing authorization for a product. The period of extension may be up 
to five years beyond the expiration of the patent, but cannot extend the remaining term of a patent beyond a total of 14 years from the date of 
product approval. Only one patent among those eligible for an extension may be extended. In Europe, a Supplementary Protection 
Certificate, or SPC, may be available to extend the term of certain European patents covering our products; this requires application for an 
SPC in individual European Patent Convention, or EPC, member countries following product approval. However, there is no guarantee that 
the applicable authorities, including the FDA, will agree with our assessment of whether such extensions should be granted, and even if 
granted, the length of such extensions. In the U.S., the exact duration of the extension depends on the time we spend in clinical studies as 
well as getting marketing approval from the FDA. 
The exclusivity positions for our commercial products and our clinical-stage product candidates as of December 31, 2022 are 
summarized below.
Crysvita (Burosumab) Exclusivity
We have in-licensed rights from KKC to patents and patent applications relating to Crysvita and its use for the treatment of XLH, TIO, 
and various other hypophosphatemic conditions. Pursuant to this license, we have rights to five issued U.S. patents, as well as issued 
patents and patent applications in other jurisdictions. The U.S. patents expire between 2028 and 2035. In addition to the foregoing patent 
protections, Crysvita is protected in the U.S. by regulatory exclusivity until 2030 and by orphan drug exclusivity for treating XLH and TIO until 
2025 and 2027, respectively. 
Mepsevii (Vestronidase Alfa) Exclusivity
We own four issued U.S. patents and the corresponding issued foreign patents covering Mepsevii and its use in the treatment of 
lysosomal storage disorders such as MPS VII. These patents expire in 2035. Mepsevii is also protected in the U.S. by regulatory exclusivity 
until 2029 and by orphan drug exclusivity for treating MPS VII until 2024. 
Dojolvi (Triheptanoin) Exclusivity
We have an exclusive license from BRI to patents and patent applications relating to Dojolvi and its use for the treatment of FAOD. 
The in-licensed BRI patent portfolio includes issued patents in the U.S and Mexico that expire in 2025 and cover Dojolvi, as well as an issued 
patent in Canada that expires in 2025 and covers the use of Dojolvi for the treatment of FAOD. In the U.S., we have applied to extend the 
term of a BRI patent covering Dojolvi from 2025 to 2029. Beyond these BRI patents and patent applications, we own a pending U.S. patent 
application, corresponding foreign patent applications, and issued patents in Australia, Israel, Korea, Malaysia, and Taiwan relating to our 
pharmaceutical-grade Dojolvi composition; these owned patents and any additional patents issuing from these owned applications are 
expected to expire in 2034. Dojolvi is also protected in the U.S. by regulatory exclusivity until 2025 and orphan drug exclusivity for treating 
FAOD until 2027. 
18
 
Evkeeza (Evinacumab) Exclusivity
We have an exclusive license from Regeneron to certain Regeneron patents for the development and commercialization of Evkeeza 
outside of the U.S. for the treatment of HoFH and other hyperlipidemia/hypercholesterolemia indications. The in-licensed Regeneron patent 
portfolio includes a patent family containing several issued foreign patents that expire in 2032 and cover the Evkeeza antibody; Regeneron 
has filed supplementary protection certificates to extend the rights associated with the European patent within this family until 2036 in certain 
countries. The in-licensed Regeneron patent portfolio contains five other patent families, one of which includes several pending patent 
applications directed to a stabilized pharmaceutical formulation comprising Evkeeza; we expect any patents emanating from this patent 
family to expire in 2040. In addition to the foregoing patent protections, Evkeeza is protected in Europe by data exclusivity until 2029 and 
marketing exclusivity until 2031. 
DTX401 (Pariglasgene Brecaparvovec) Exclusivity
We have two in-licenses to patents and patent applications covering elements of our DTX401 product candidate. First, we have in-
licensed an issued U.S. patent owned by the University of Pennsylvania, or UPENN, and sublicensed to us by REGENX relating to the AAV8 
capsid used in DTX401 that expires in 2024. Second, we have a non-exclusive license from the National Institutes of Health, or NIH, to an 
issued U.S. patent expiring in 2034 (not accounting for any available PTE) and corresponding foreign patents covering a recombinant nucleic 
acid construct used in DTX401 that includes a codon-optimized version of the G6Pase gene.
DTX301 (Avalotcagene Ontaparvovec) Exclusivity
We have a license to two patent families covering elements of our DTX301 product candidate. These patent families are owned by 
UPENN and sublicensed to us by REGENX. The in-licensed UPENN patent portfolio includes an issued U.S. patent relating to the AAV8 
capsid used in DTX301 that expires in 2024, as well as two issued U.S. patents expiring in 2035 (not accounting for any available PTE) and 
corresponding foreign patents and patent applications covering the codon-optimized version of the OTC gene used in DTX301.
UX143 (Setrusumab) Exclusivity
We have in-licensed rights from Mereo to patents and patent applications relating to setrusumab and its use for the treatment of OI. 
Pursuant to our license from Mereo, we have exclusive rights outside of Europe to a Mereo patent family that includes three issued U.S. 
patents and corresponding issued foreign patents that relate to the setrusumab antibody, nucleic acids encoding setrusumab, processes for 
producing setrusumab, and setrusumab’s use as a medicament. Patents emanating from this patent family expire in 2028 (not accounting for 
any available PTE). We also have exclusive rights outside of Europe to two additional Mereo patent families, including an issued U.S. patent 
expiring in 2037 (not accounting for any available PTE), relating to methods of using anti-sclerostin antibodies including setrusumab for the 
treatment of OI. Beyond these Mereo patents and patent applications, we jointly own with Mereo a patent family relating to dosing regimens 
for the use of anti-sclerostin antibodies including setrusumab in the treatment of OI; we expect any patents emanating from this patent family 
to expire in 2042 (not accounting for any available PTE). 
DTX201 (Peboctocogene Camaparvovec) Exclusivity 
We have a license to two patent families covering elements of our DTX201 product candidate. These patent families are owned by 
UPENN and sublicensed to us by REGENX. The in-licensed UPENN patent portfolio includes three issued U.S. patents and corresponding 
foreign patents relating to the AAVhu37 capsid used in DTX201 that expire in 2024, as well as an issued U.S. patent expiring in 2037 (not 
accounting for any available PTE) and corresponding foreign patents and patent applications covering the codon-optimized version of the 
Factor VIII gene used in DTX201. 
UX111 Exclusivity 
We have an exclusive license from Nationwide Children’s Hospital, or NCH, to a pending U.S. patent application covering a method of 
treating MPS IIIA by intravenously administering a recombinant AAV9 vector comprising a U1a promoter and a polynucleotide sequence 
encoding N-sulfoglucosamine sulfohydrolase, or SGSH; we expect any patent emanating from this application to expire in 2032 (not 
accounting for any available PTE). 
GTX-102 Exclusivity 
We have an exclusive license from Texas A&M University, or TAMU, to a patent family filed in the U.S. and several foreign jurisdictions 
relating to UBE3A antisense oligonucleotides including GTX-102 and their use for the treatment of Angelman syndrome, 
19
 
or AS. The in-licensed TAMU patent family includes an issued U.S. patent expiring in 2038 (not accounting for any available PTE) that covers 
a method of using GTX-102 for the treatment of AS.
UX701 Exclusivity 
We have two licenses to patents and patent applications covering elements of our UX701 product candidate. First, we have in-licensed 
patents owned by UPENN and sublicensed to us by REGENX relating to the AAV9 capsid used in UX701 that expire between 2024 and 
2026 in the U.S., and in 2024 in foreign countries. Second, we have an exclusive license from UPENN to a patent family filed in the U.S. and 
several foreign jurisdictions relating to AAV vectors containing certain regulatory and coding sequences packaged in UX701; this patent 
family includes an issued U.S. patent expiring in 2039 (not accounting for any available PTE). Beyond these in-licenses, we own a patent 
family covering AAV vectors expressing a novel truncated version of the ATP7B protein produced by UX701; we expect any patents 
emanating from this patent family to expire in 2040 (not accounting for any available PTE). 
UX053 Exclusivity 
We have a license from Arcturus to four issued U.S. patents expiring between 2034 and 2038 (not accounting for any available PTE), 
and corresponding foreign patents and applications, that cover the cationic lipid used in our UX053 product candidate. Beyond these 
Arcturus patents and patent applications, we own a patent family filed in the U.S. and several foreign jurisdictions covering the codon-
optimized version of the human AGL mRNA contained in UX053; this patent family includes an issued U.S. patent expiring in 2039 (not 
accounting for any available PTE).
Trademarks 
We own registered trademarks covering the Ultragenyx word mark in the U.S. and multiple other jurisdictions. In addition, we have a 
pending trademark application in the U.S. covering a stylized design of our Ultragenyx logo. We also own registered trademarks in the U.S. 
and other territories relating to our Mepsevii and Dojolvi brand names for vestronidase alfa and triheptanoin, respectively. We additionally 
have licenses from KKC and Regeneron to registered trademarks covering the Crysvita and Evkeeza brand names, respectively, in territories 
where we have rights to commercialize these products.
Other 
We rely upon unpatented trade secrets, know-how, and continuing technological innovation to develop and maintain our competitive 
position. We seek to protect our ownership of know-how and trade secrets through an active program of legal mechanisms including 
assignments, confidentiality agreements, material transfer agreements, research collaborations, and licenses.
Manufacturing 
We currently contract with third parties for the manufacturing and testing of our products and product candidates for use in preclinical, 
clinical, and commercial applications. We do not own or operate manufacturing facilities for the cGMP production of clinical or commercial 
quantities of our product candidates. We do, however, have process and analytical development and QC lab capabilities focused on the gene 
therapy and nucleic acid technologies. The use of contracted manufacturing and reliance on collaboration partners has historically minimized 
our direct investment in manufacturing facilities and additional staff early in development. Although we rely on contract manufacturers, we 
have personnel with extensive manufacturing experience to oversee our contract manufacturers. All of our third-party manufacturers are 
subject to periodic audits to confirm compliance with applicable regulations and must pass inspection before we can manufacture our drugs 
for commercial sales.
While our third-party manufacturers have met our current manufacturing requirements, we are building our own GMP gene therapy 
manufacturing plant to seek to mitigate potential program timeline delays, control manufacturing costs and reduce manufacturing lead times. 
For the other non-gene therapy modalities, we primarily use third-party manufacturers to meet our projected needs for commercial 
manufacturing. Third parties with whom we currently work might need to increase their scale of production or we will need to secure alternate 
suppliers. We believe that there are alternate sources of supply that can satisfy our clinical and commercial requirements, although we 
cannot be certain that identifying and establishing relationships with such sources, if necessary, would not result in significant delay or 
material additional costs. 
20
 
  
Products
Mepsevii 
The Mepsevii drug substance is manufactured by Rentschler Biopharma SE, or Rentschler, under non-exclusive commercial supply 
and services agreements effective December 2017 and January 2018, respectively. The drug substance agreement has an initial term of five 
years, which will be automatically extended for another five years following the initial term, and will continue in full force and effect for its term 
unless earlier terminated. Following the initial term, we and Rentschler can withdraw from the agreement without cause upon prior notice for 
specified periods. In addition, either party may terminate the agreement if the other party breaches a material provision and such breach 
remains uncured for a specified period following receipt by the breaching party of written notice of such breach. We can also terminate the 
agreement if Rentschler loses the right to operate under the agreement. Either party can also terminate the agreements if Rentschler is 
unable to deliver its agreed upon services for a certain period in the case of a force majeure event. The cell line to produce Mepsevii is 
specific for this product and is in our control and stored in multiple secure locations. All other raw materials are commercially available. We 
transferred the fill and finish activities for the manufacture of Mepsevii Drug Product to a new site, BSP Pharmaceuticals S.p.A., or BSP, 
located in Latina, Italy as the Rentschler manufacturing site in Laupheim, Germany was discontinued. The site change was approved by 
relevant global authorities, including the FDA, on May 5, 2022. Sufficient inventory levels were maintained during the transfer of the fill and 
finish activities for Mepsevii to BSP.
Crysvita 
The drug substance and drug product for burosumab are made by KKC in Japan under the collaboration and license agreement with 
KKC. The cell line to produce burosumab is specific for this product and is in KKC’s control. All other raw materials are commercially 
available. 
Dojolvi 
The pharmaceutical-grade drug substance for Dojolvi is manufactured by IOI Oleo GmbH, or IOI Oleo, in Germany under an exclusive 
worldwide supply agreement, subject to certain limitations, executed in 2012 with an initial term of three years. The agreement automatically 
renews for two-year periods at the end of each then current term unless either party notifies the other party of its intention not to renew in 
writing at least three calendar months before the expiration of the then current term. Additionally, if a party materially breaches an obligation 
under the agreement and does not cure such breach within 60 days of receiving notice of the breach from the non-breaching party, the non-
breaching party may terminate the agreement immediately upon written notice to the breaching party. The drug product for Dojolvi is 
manufactured by Aenova Haupt Pharma Wolfratshausen GmbH, or Haupt Pharma, pursuant to a Master Services Agreement, for the non-
exclusive manufacture and supply of product. The agreement was executed in April 2019 with an initial three-year term and automatically 
renews at the end of the current term for an indefinite period unless we provide written notice of termination to Haupt Pharma no later than 60 
days prior to the expiration of the initial term. After the initial term, either party may terminate the agreement without cause with at least 12 
months’ notice. Additionally, if a party materially breaches certain obligations under the agreement and does not cure such breach within 30 
days of receiving notice of the breach from the non-breaching party, the non-breaching party may terminate the agreement immediately upon 
written notice to the breaching party. Either party may also terminate the agreement with immediate effect if the other party breaches certain 
specified obligations as set forth in the agreement.
Evkeeza 
On January 7, 2022, we announced a license and collaboration agreement with Regeneron for us to clinically develop, commercialize 
and distribute Evkeeza in countries outside of the U.S. Evkeeza is a fully human monoclonal antibody that binds to and blocks the function of 
angiopoietin-like 3, or ANGPTL3, a protein that plays a key role in lipid metabolism.
The Evkeeza drug substance is manufactured by Regeneron at their manufacturing facility in Rensselaer, New York and the drug 
product is manufactured by Baxter Pharmaceutical Solutions, LLC. at their manufacturing facility in Bloomington, Indiana. Release testing of 
the drug product is performed by Regeneron and third-party suppliers.
We utilize third-party suppliers to perform packaging, labelling, distribution, and testing as needed for Evkeeza.
21
 
 
Product Candidates
The drug substances and drug products for our product candidates are manufactured using our network of GMP contract 
manufacturing organizations, or CMOs, which are carefully selected and actively managed for high quality, reliable clinical supply. The CMOs 
are located in Western Europe or North America.
Commercialization and Product Support 
We have built our own commercial organizations in North America, Europe, Latin America and Japan to effectively support the 
commercialization of our products and product candidates, if approved. Our intention is to expand our product portfolio and its geographic 
accessibility through the continued development of our proprietary pipeline or through strategic partnerships. We may elect to utilize strategic 
partners, distributors, or contract management organizations to assist in the commercialization of our products in certain geographies. The 
commercial infrastructure for rare disease products typically consists of a targeted, specialty field organization that educates a limited and 
focused group of physicians supported by field management and internal support teams, which includes patient support services, distribution, 
and market access. One challenge, unique to commercializing therapies for rare diseases, is the difficulty in identifying eligible patients due 
to the very small and sometimes heterogeneous patient populations along with often undefined clinical or genetic tests to confirm diagnosis. 
Our commercial and medical affairs teams focus on maximizing patient identification for both clinical development and commercialization 
purposes in rare diseases. 
Additional capabilities important to the rare disease marketplace in the U.S. include the management of key stakeholders such as 
managed care organizations, specialty pharmacies, and government payers. In many countries outside the U.S. single national payers are 
critical to providing reimbursement access. To develop the appropriate commercial infrastructure, we will have to invest a significant amount 
of financial and management resources, some of which will be committed prior to regulatory approval of the products that they are intended 
to support. 
We continue to support commercial and medical affairs organizations as well as other capabilities across North America, Europe, Latin 
America, and Japan to meet the scientific educational needs of the healthcare providers and patients in the rare disease community, focusing 
on providing accurate disease state information and balanced product information across our portfolio for appropriate management of 
patients with rare disorders.
Medical affairs is comprised of the following capabilities in support of our mission: medical information, patient advocacy, patient 
diagnosis liaisons, medical science liaisons, research and educational grants. Medical affairs will engage as early as Phase 1 and will 
continue work throughout the lifecycle of each product and product candidate as dictated by the specific scientific needs in each therapeutic 
area.
Government Regulation 
Government authorities in the U.S. (including federal, state, and local authorities) and in other countries, extensively regulate, among 
other things, the manufacturing, research and clinical development, marketing, labeling and packaging, storage, distribution, post-approval 
monitoring and reporting, advertising and promotion, pricing, and export and import of pharmaceutical products, such as those we are 
developing. We must obtain the requisite approvals from regulatory authorities in the U.S. and foreign countries prior to the commencement 
of clinical studies or marketing of the product in those countries. Accordingly, our operations are and will be subject to a variety of regulations 
and other requirements, which vary from country to country. The process of obtaining regulatory approvals and the subsequent compliance 
with appropriate federal, state, local, and foreign statutes and regulations require the expenditure of substantial time and financial resources 
that has a significant impact on our capital expenditures and results of operations.
Global Regulation of Clinical Studies 
Clinical studies involve the administration of an investigational medicinal product to human subjects under the supervision of qualified 
investigators in accordance with protocols, Good Clinical Practices, or GCP, the ethical principles that have their origin in the Declaration of 
Helsinki and applicable regulatory requirements. A protocol for each clinical study and any subsequent protocol amendments are typically 
submitted to the FDA or other applicable regulatory authorities as part of an investigational new drug application, or IND, or clinical trial 
application, or CTA. Additionally, approval must also be obtained from each clinical study site’s institutional review board, or IRB, or Ethics 
Committee, or EC, before the studies may be initiated, and the IRB or EC must monitor the study until completed. There are also 
requirements governing the reporting of ongoing clinical studies and clinical study results to public registries. 
The clinical investigation of a drug is generally divided into three or four phases. Although the phases are usually conducted 
sequentially, they may overlap or be combined. 
22
 
•
•
•
•
Phase 1. The drug is initially introduced into healthy human subjects or patients with the target disease or condition. These 
studies are designed to evaluate the safety, dosage tolerance, pharmacokinetics, and pharmacologic actions of the investigational 
new drug in humans, and if possible, to gain early evidence on effectiveness. 
Phase 2. The drug is administered to a limited patient population to evaluate dosage tolerance and optimal dosage, identify 
possible adverse side effects and safety risks, and preliminarily evaluate efficacy. 
Phase 3. The drug is administered to an expanded patient population, generally at geographically dispersed clinical study sites to 
generate enough data to statistically evaluate dosage, clinical effectiveness, and safety, to establish the overall benefit-risk 
relationship of the investigational new drug product, and to provide an adequate basis for product approval. 
Phase 4. In some cases, additional studies and patient follow-up are conducted to gain experience from the treatment of patients 
in the intended therapeutic indication. Regulatory authorities may condition approval of a marketing application for a product 
candidate on the sponsor’s agreement to conduct additional clinical studies after approval. In other cases, a sponsor may 
voluntarily conduct additional clinical studies after approval to gain more information about the drug. Such post-approval studies 
are typically referred to as Phase 4 clinical studies.
A pivotal study is a clinical study that adequately meets regulatory authority requirements for the evaluation of a drug candidate’s 
efficacy and safety such that it can be used to justify the approval of the product. Generally, pivotal studies are Phase 3 studies, but 
regulatory authorities may accept results from Phase 2 studies if the study design provides a well-controlled and reliable assessment of 
clinical benefit, particularly in situations where there is an unmet medical need and the results are sufficiently robust. 
U.S. Government Regulation 
In the U.S., the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act, or FDCA, and its implementing regulations, and 
biologics under the FDCA and the Public Health Service Act, or PHSA, and its implementing regulations. FDA approval is required before 
any new drug or dosage form, including a new use of a previously approved drug, can be marketed in the U.S. Drugs and biologics are also 
subject to other federal, state, and local statutes and regulations. 
The process required by the FDA before product candidates may be marketed or sold in the U.S. generally involves the following: 
•
•
•
•
•
•
•
•
completion of extensive preclinical laboratory tests and preclinical animal studies performed in accordance with the Good 
Laboratory Practices, or GLP, regulations and the U.S. Department of Agriculture’s Animal Welfare Act; 
submission to the FDA of an IND, which must become effective before human clinical studies may begin and must be updated 
annually; 
conducting adequate and well-controlled human clinical studies that generally follow the three- to four-phase design described 
above to establish the safety and efficacy of the product candidate for each proposed indication under an active IND and 
approved by an independent IRB representing each clinical site; 
preparation of and submission to the FDA of a new drug application, or NDA, or biologics license application, or BLA, after 
completion of all pivotal clinical studies; 
potential review of the product application by an FDA advisory committee, where appropriate and if applicable; 
satisfactory completion of an FDA pre-approval inspection of the manufacturing facilities where the proposed drug substance and 
drug product are produced to assess compliance with Good Manufacturing Practices, or GMP;
FDA inspection of one or more clinical sites to assure compliance with GCP; and 
FDA review and approval of an NDA or BLA.
Submission of an NDA or BLA to the FDA 
Assuming successful completion of all required testing in accordance with all applicable regulatory requirements, detailed 
investigational new drug product information is submitted to the FDA in the form of an NDA or BLA requesting approval to market the product 
for one or more indications. Under federal law, the submission of most NDAs and BLAs is subject to a significant application user fee, unless 
waived. 
Once an NDA or BLA has been submitted, the FDA’s goal is to review the application within ten months after it accepts the application 
for filing, or, if the application relates to an unmet medical need in the treatment of a serious or life-threatening condition, six months after the 
FDA accepts the application for filing. The review process can be significantly extended by FDA requests for additional information or 
clarification. 
23
 
The FDA’s Decision on an NDA or BLA 
The FDA may issue an approval letter if it finds the application has adequate support for commercial marketing. An approval letter 
authorizes commercial marketing of the drug with specific prescribing information for specific indications. As a condition of NDA or BLA 
approval, the FDA may impose additional requirements, such as post-marketing studies and/or a Risk Evaluation and Mitigation Strategy, or 
REMS, to help ensure that the benefits of the drug outweigh the potential risks. A REMS can include medication guides, communication 
plans for healthcare professionals, and elements to assure safe use. The FDA may also issue a Complete Response Letter, which indicates 
that the review cycle of the application is complete but the application is not ready for approval. A Complete Response Letter may require 
additional clinical data and/or an additional pivotal Phase 3 clinical study(ies), and/or other significant, expensive and time-consuming 
requirements related to clinical studies, preclinical studies or manufacturing. If the conditions set forth in the Complete Response Letter are 
met, the FDA may approve the product for marketing. 
Expedited Review and Accelerated Approval Programs 
A sponsor may seek approval of its product candidate under programs designed to accelerate the FDA’s review and approval of NDAs 
and BLAs. For example, Fast Track Designation may be granted to a drug intended for treatment of a serious or life-threatening disease or 
condition and data demonstrate its potential to address unmet medical needs for the disease or condition. The key benefits of fast-track 
designation are the eligibility for priority review, rolling review (submission of portions of an application before the complete marketing 
application is submitted), and accelerated approval, if relevant criteria are met. The FDA may grant the NDA or BLA a priority review 
designation, which sets the target date for FDA action on the application at six months after the FDA accepts the application for filing. Priority 
review is granted where there is evidence that the proposed product would be a significant improvement in the safety or effectiveness of the 
treatment, diagnosis, or prevention of a serious condition. Priority review designation does not change the scientific/medical standard for 
approval or the quality of evidence necessary to support approval. 
The FDA may approve an NDA or BLA under the accelerated approval program if the drug treats a serious condition, provides a 
meaningful advantage over available therapies, and demonstrates an effect on either (1) a surrogate endpoint that is reasonably likely to 
predict clinical benefit, or (2) on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality, that is reasonably 
likely to predict an effect on irreversible morbidity or mortality or other clinical benefit, taking into account the severity, rarity, or prevalence of 
the condition and the availability or lack of alternative treatments. Post-marketing studies or completion of ongoing studies after marketing 
approval are generally required to verify the drug’s clinical benefit in relationship to the surrogate endpoint or ultimate outcome in relationship 
to the clinical benefit. 
In addition, the Food and Drug Administration Safety and Innovation Act, or FDASIA, established the Breakthrough Therapy 
designation. A sponsor may seek FDA designation of its product candidate as a breakthrough therapy if the drug is intended, alone or in 
combination with one or more other drugs, to treat a serious or life-threatening disease or condition and preliminary clinical evidence 
indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such 
as substantial treatment effects observed early in clinical development. If a drug is designated as a breakthrough therapy, the FDA will 
provide more intensive guidance on the drug development program and expedite its review.
Furthermore, the FDA has made available expedited programs to sponsors of regenerative medicine therapies that have been granted 
designation as a regenerative medicine advanced therapy, or RMAT. Regenerative medicine therapies include cell therapies, therapeutic 
tissue engineering products and human cell and tissue products. A sponsor may seek RMAT designation if its regenerative medicine product 
is intended for a serious condition and preliminary clinical evidence indicates that the regenerative medicine therapy has the potential to 
address unmet medical needs for such condition.
The 2023 Consolidated Appropriations Act strengthens the FDA’s authority to require and regulate post-approval studies of 
accelerated approval drugs and to expedite the rescission of accelerated approval based on the post-approval studies. 
Orphan Designation and Exclusivity 
Under the Orphan Drug Act, the FDA may grant orphan drug designation to drugs intended to treat a rare disease or condition that 
affects fewer than 200,000 individuals in the U.S., or if it affects more than 200,000 individuals in the U.S. and there is no reasonable 
expectation that the cost of developing and making the drug for this type of disease or condition will be recovered from sales in the U.S. 
24
 
Orphan drug designation entitles a party to financial incentives such as opportunities for grant funding towards clinical study costs, tax 
advantages, and user-fee waivers. Orphan drug designation does not convey any advantage in, or shorten the duration of, the regulatory 
review and approval process. In addition, the first NDA or BLA applicant to receive orphan drug designation for a particular drug is entitled to 
orphan drug exclusivity, which means the FDA may not approve any other application to market the same drug for the same indication for a 
period of seven years in the U.S., except in limited circumstances. Orphan drug exclusivity does not prevent the FDA from approving a 
different drug for the same disease or condition, or the same drug for a different disease or condition.
There is some uncertainty with respect to the FDA’s interpretation of the scope of orphan drug exclusivity. Historically, exclusivity was 
specific to the orphan indication for which the drug was approved. As a result, the scope of exclusivity was interpreted as preventing approval 
of a competing product. However, in 2021, the federal court in Catalyst Pharmaceuticals, Inc. v. Becerra, suggested that orphan drug 
exclusivity covers the full scope of the orphan-designated “disease or condition” regardless of whether a drug obtained approval for a 
narrower use. 
Pediatric Studies and Exclusivity 
NDAs and BLAs must contain data to assess the safety and effectiveness of an investigational new drug product for the claimed 
indications in all relevant pediatric populations in order to support dosing and administration for each pediatric subpopulation for which the 
drug is safe and effective. The FDA may, on its own initiative or at the request of the applicant, grant deferrals for submission of some or all 
pediatric data until after approval of the product for use in adults or full or partial waivers if certain criteria are met. Pediatric development 
plans can be discussed with the FDA at any time, but usually occur any time between the end-of-Phase 2 meeting and submission of the 
NDA or BLA. Unless otherwise required by regulation, the requirements for pediatric data do not apply to any drug for an indication for which 
orphan designation has been granted. 
Pediatric exclusivity is another type of non-patent exclusivity in the U.S. that may be granted if certain FDA requirements are met, such 
as FDA’s determination that information relating to the use of a new drug in the pediatric population may produce health benefits, and the 
applicant agrees to perform and report on FDA-requested studies within a certain time frame. Pediatric exclusivity adds a period of six 
months of exclusivity to the end of all existing marketing exclusivity and patents held by the sponsor for that active moiety. This is not a 
patent term extension, but it effectively extends the regulatory period during which the FDA cannot accept or approve another application 
relying on the NDA or BLA sponsor’s data. 
Biosimilars and Exclusivity 
The Patient Protection and Affordable Care Act of 2010, or Affordable Care Act, includes a subtitle called the Biologics Price 
Competition and Innovation Act of 2009, or BPCI Act, which created an abbreviated approval pathway for biological products shown to be 
similar to, or interchangeable with, an FDA-licensed reference biological product. 
A reference biologic is granted twelve years of exclusivity from the time of first licensure of the reference product. The first biologic 
product submitted under the abbreviated approval pathway that is determined to be interchangeable with the reference product has 
exclusivity against other biologics submitting under the abbreviated approval pathway for the lesser of (i) one year after the first commercial 
marketing, (ii) eighteen months after approval if there is no legal challenge, (iii) eighteen months after the resolution in the applicant’s favor of 
a lawsuit challenging the biologics’ patents if an application has been submitted, or (iv) 42 months after the application has been approved if 
a lawsuit is ongoing within the 42-month period.
The Inflation Reduction Act of 2022, or the IRA, is intended to foster generic and biosimilar competition and to lower drug and biologic 
costs. The IRA provides the Centers for Medicare & Medicaid Services, or CMS, with significant new authorities. CMS will be able to directly 
negotiate prescription drug prices and to cap out-of-pocket costs. Each year, CMS will select and negotiate a preset number of high-spend 
drugs and biologics covered under Medicare Parts B and D that lack generic or biosimilar competition. Price negotiations begin in 2023. 
Taking effect in 2023, the IRA provides a new “inflation rebate” that covers Medicare patients and is intended to counter certain price 
increases in prescription drugs. The inflation rebate requires drug manufacturers to pay a rebate to the federal government if the price for a 
drug or biologic under Medicare Parts B or D increases faster than the rate of inflation. To support biosimilar competition, qualifying 
biosimilars may receive a Medicare Part B payment increase for a period of five years, beginning in October 2022. Separately, if a biologic 
drug for which no biosimilar exists delays a biosimilar’s market entry beyond two years, CMS will be authorized to subject the biologics 
manufacturer to price negotiations intended to ensure fair competition. Notwithstanding these provisions, the IRA’s impact on competition and 
commercialization remains largely uncertain. 
25
 
Abbreviated New Drug Applications for Generic Drugs and New Chemical Entity Exclusivity
The Drug Price Competition and Patent Term Restoration Act of 1984, or the Hatch-Waxman Amendments, authorized the FDA to 
approve generic drugs that are bioequivalent (i.e. identical) to previously approved branded drugs. To obtain approval of a generic drug, an 
applicant must submit an abbreviated new drug application, or ANDA, to the FDA. In support of such applications, a generic manufacturer 
may rely on the preclinical and clinical testing conducted for a drug product previously approved under an NDA, known as the reference 
listed drug, or RLD. 
Specifically, in order for an ANDA to be approved, the FDA must find that the generic version is bioequivalent to the RLD with respect 
to the active ingredients, the route of administration, the dosage form, quality and performance characteristics, the strength of the drug, and 
intended use. 
The FDCA provides a period of five years of non-patent exclusivity for a new drug containing a new chemical entity. In cases where 
such exclusivity has been granted, an ANDA may not be filed with the FDA until the expiration of five years unless the submission is 
accompanied by a Paragraph IV certification, in which case the applicant may submit its application four years following the original product 
approval. The FDCA also provides for a period of three years of exclusivity if an NDA or supplement includes reports of one or more new 
clinical investigations, other than bioavailability or bioequivalence studies, that were conducted by or for the applicant and are essential to the 
approval of the application. This three-year exclusivity period often protects changes to a previously approved drug product, such as a new 
dosage form, route of administration, combination or indication. 
When an ANDA applicant files its application with the FDA, it must certify, among other things, that the new product will not infringe the 
already approved product’s listed patents or that such patents are invalid or unenforceable, which is called a Paragraph IV certification. If the 
applicant does not challenge the listed patents or indicates that it is not seeking approval of a patented method of use, the ANDA application 
will not be approved until all the listed patents claiming the referenced product have expired. If the ANDA applicant has provided a Paragraph 
IV certification to the FDA, the applicant must also send notice of the Paragraph IV certification to the NDA and patent holders once the 
ANDA has been accepted for filing by the FDA. The NDA and patent holders may then initiate a patent infringement lawsuit in response to 
the notice of the Paragraph IV certification. The filing of a patent infringement lawsuit within 45 days after the receipt of a Paragraph IV 
certification automatically prevents the FDA from approving the ANDA until the earlier of 30 months after the receipt of the Paragraph IV 
notice, expiration of the patent, or a decision in the infringement case that is favorable to the ANDA applicant. 
Patent Term Restoration
Some of our U.S. patents may be eligible for limited patent term extension under the Hatch-Waxman Amendments. The Hatch-
Waxman Amendments permit a patent restoration term of up to five years as compensation for patent term lost during product development 
and the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 
years from the product’s approval date. The patent term restoration period is generally one-half the time between the effective date of an IND 
and the submission date of an NDA or BLA, plus the time between the submission date and the approval of that application. Only one patent 
applicable to an approved product is eligible for the extension and the application for the extension must be submitted prior to the expiration 
of the patent. The U.S. Patent and Trademark Office, or USPTO, in consultation with the FDA, reviews and approves the application for any 
patent term extension or restoration. Thus, for each approved product, we may apply for restoration of patent term for one of our related 
owned or licensed patents to add patent life beyond the original expiration date, depending on the expected length of the clinical studies and 
other factors involved in the filing of the relevant NDA or BLA.
EU Regulation 
In the EU and in Iceland, Norway and Liechtenstein, together the European Economic Area or EEA, after completion of all required 
clinical testing, pharmaceutical products may only be placed on the market after obtaining a Marketing Authorization, or MA. To obtain a MA, 
we must submit a marketing authorization application, or MAA. The content of the MAA is similar to that of an NDA or BLA filed in the U.S., 
with the exception of, among other things, country-specific document requirements. 
26
 
Authorization Procedures
Medicines can be authorized by using, among other things, a centralized or decentralized procedure. The centralized authorization 
procedure results in a single marketing authorization issued by the European Commission, or EC, following the scientific assessment of the 
application by the European Medicines Agency, or EMA, that is valid across the EEA. The centralized procedure is compulsory for specific 
medicinal products, including medicines developed by means of certain biotechnological processes, products designated as orphan 
medicinal products, advanced therapy medicinal products, or ATMPs, and medicinal products with a new active substance indicated for the 
treatment of certain diseases (for instance, AIDS, cancer, neurodegenerative disorders, diabetes, auto-immune and viral diseases). 
Medicines that fall outside the mandatory scope of the centralized procedure have three routes to authorization: (i) they can be authorized 
under the centralized procedure if they concern a significant therapeutic, scientific or technical innovation, or if their authorization would be in 
the interest of public health; (ii) they can be authorized under a decentralized procedure where an applicant applies for simultaneous 
authorization in more than one EU country; or (iii) they can be authorized in a EU member state in accordance with that state’s national 
procedures and then be authorized in other EU countries by a procedure whereby the countries concerned agree to recognize the validity of 
the original, national marketing authorization (mutual recognition procedure). 
All new MAAs must include a Risk Management Plan, or RMP, describing the risk management system that the company will put in 
place and documenting measures to prevent or minimize the risks associated with the product. RMPs are continually modified and updated 
throughout the lifetime of the medicine as new information becomes available. We need to submit an updated RMP: (i) at the request of EMA 
or a national competent authority, or (ii) whenever the risk-management system is modified, especially as the result of new information being 
received that may lead to a significant change to the benefit-risk profile or as a result of an important pharmacovigilance or risk-minimization 
milestone being reached. The regulatory authorities may also impose specific obligations as a condition of the MA. RMPs and Periodic 
Safety Update Reports, or PSURs, are routinely available to third parties requesting access, subject to limited redactions.
Special rules apply in part for ATMPs. ATMPs comprise gene therapy products, somatic cell therapy products and tissue engineered 
products, which are genes, cells or tissues that have undergone substantial manipulation and that are administered to human beings in order 
to cure, diagnose or prevent diseases or regenerate, repair or replace a human tissue. Pursuant to the ATMP Regulation, the Committee on 
Advanced Therapies, or CAT, is responsible in conjunction with the CHMP for the evaluation of ATMPs. The CHMP and CAT are also 
responsible for providing guidelines on ATMPs. These guidelines provide additional guidance on the factors that the EMA will consider in 
relation to the development and evaluation of ATMPs and include, among other things, the preclinical studies required to characterize 
ATMPs. The manufacturing and control information that should be submitted in a MAA; and post-approval measures required to monitor 
patients and evaluate the long- term efficacy and potential adverse reactions of ATMPs. Although such guidelines are not legally binding, 
compliance with them is often necessary to gain and maintain approval for product candidates. In addition to the mandatory RMP, the holder 
of a MA for an ATMP must put in place and maintain a system to ensure that each individual product and its starting and raw materials, 
including all substances coming into contact with the cells or tissues it may contain, can be traced through the sourcing, manufacturing, 
packaging, storage, transport and delivery to the relevant healthcare institution where the product is used.
A Pediatric Investigation Plan, or PIP, and/or a request for waiver (for example, because the relevant disease or condition occurs only 
in adults) or deferral (for example, until enough information to demonstrate its effectiveness and safety in adults is available), is required for 
submission prior to submitting an MAA. A PIP describes, among other things, proposed pediatric studies and their timing relative to clinical 
studies in adults and an MAA must comply with the PIP to be validated.
MAA Review and Approval Timeframe and Accelerated Assessment 
Under the centralized procedure in the EU, the Committee for Medicinal Products for Human Use, or CHMP, established at the EMA, is 
responsible for conducting the initial assessment of a drug. In principle, the maximum timeframe for the evaluation of an MAA by the CHMP 
is 210 days from receipt of a valid MAA. However, this timeline excludes clock stops, when additional written or oral information is to be 
provided by the applicant in response to questions asked by the CHMP, so the overall process typically takes a year or more. A favorable 
opinion on the application by the CHMP will typically result in the granting of the marketing authorization within 67 days of receipt of the 
opinion. Accelerated evaluation might be granted by the CHMP in exceptional cases, when a medicinal product is expected to be of a major 
public health interest, particularly from the point of view of therapeutic innovation. In this circumstance, and upon request by the applicant, 
the CHMP’s evaluation time frame is reduced to 150 days, excluding time taken by an applicant to respond to questions.
27
 
MA Validity Period 
MAs have an initial duration of five years. After five years, the authorization may subsequently be renewed on the basis of a 
reevaluation of the risk-benefit balance. Once renewed, the MA is valid for an unlimited period unless the EC or the national competent 
authority decides, on justified grounds relating to pharmacovigilance, to proceed with only one additional five-year renewal. Applications for 
renewal must be made to the EMA at least nine months before the five-year period expires.
Conduct of Clinical Trials 
Clinical trials are studies intended to discover or verify the effects of one or more investigational medicines. The regulation of clinical 
trials aims to promote the protection of the rights, safety and well-being of trial participants and the credibility of the results of clinical trials. 
Regardless of where they are conducted, all clinical trials included in applications for marketing authorization for human medicines in the EU 
or EEA must have been carried out in accordance with EU regulations (such as, among others, the Clinical Trials Regulation (Regulation 
(EU) No 536/2014) and the Clinical Trials Directive (EC) No 2001/20/EC). This means that clinical trials conducted in the EU or EEA have to 
comply with EU clinical trial legislation and that clinical trials conducted outside the EU or EEA have to comply with ethical principles 
equivalent to those set out in the EEA, including adhering to international good clinical practice and the Declaration of Helsinki.
Exceptional Circumstances/Conditional Approval 
Orphan drugs or drugs with unmet medical needs may be eligible for EU approval under exceptional circumstances or with conditional 
approval. Approval under exceptional circumstances is applicable to orphan products and is used when an applicant is unable to provide 
comprehensive data on the efficacy and safety under normal conditions of use because the indication for which the product is intended is 
encountered so rarely that the applicant cannot reasonably be expected to provide comprehensive evidence, when the present state of 
scientific knowledge does not allow comprehensive information to be provided, or when it is medically unethical to collect such information. A 
conditional MA is applicable to orphan medicinal products, medicinal products for seriously debilitating or life-threatening diseases, or 
medicinal products to be used in emergency situations in response to recognized public threats. Conditional MAs can be granted for 
medicinal products where, although comprehensive clinical data referring to the safety and efficacy of the medicinal product have not been 
supplied, a number of criteria are fulfilled: (i) the benefit/risk balance of the product is positive, (ii) it is likely that the applicant will be in a 
position to provide the comprehensive clinical data, (iii) unmet medical needs will be fulfilled by the grant of the MA and (iv) the benefit to 
public health of the immediate availability on the market of the medicinal product concerned outweighs the risk inherent in the fact that 
additional data are still required. Conditional MAs are valid for only one year and must be reviewed annually subject to certain specific 
obligations.
PRIME Program
PRIME is a program launched by the EMA to enhance support for the development of medicines that target an unmet medical need. 
The program focuses on medicines that may offer a major therapeutic advantage over existing treatments, or benefit patients without 
treatment options. These medicines are considered priority medicines by EMA. To be accepted for PRIME, a medicine has to show its 
potential to benefit patients with unmet medical needs based on early clinical data. Through PRIME, the EMA offers early and proactive 
support to medicine developers to optimize development plans and the generation of robust data on a medicine’s benefits and risks and 
enables accelerated assessment of medicines applications. PRIME eligibility does not change the standards for product approval, and there 
is no assurance that any such designation or eligibility will result in expedited review or approval.
28
 
Orphan Designation and Exclusivity
As in the U.S., we may apply for designation of a product as an orphan drug for the treatment of a specific indication in the EU before 
the application for marketing authorization is made. The EMA’s Committee for Orphan Medicinal Products, or COMP, grants orphan drug 
designation to promote the development of products that are intended for the diagnosis, prevention, or treatment of life-threatening or 
chronically debilitating conditions affecting not more than 5 in 10,000 persons in the EU Community and for which no satisfactory method of 
diagnosis, prevention, or treatment has been authorized (or the product would be a significant benefit to those affected). Additionally, 
designation is granted for products intended for the diagnosis, prevention, or treatment of a life-threatening, seriously debilitating, or serious 
and chronic condition when, without incentives, it is unlikely that sales of the drug in the EU would be sufficient to justify the necessary 
investment in developing the medicinal product. Orphan drug designation entitles a party to financial incentives such as reduction of fees or 
fee waivers and 10 years of market exclusivity is granted following medicinal product approval. This period may be reduced to six years if the 
orphan drug designation criteria are no longer met, including where it is shown that the product is sufficiently profitable not to justify 
maintenance of market exclusivity. The applicant will receive a fee reduction for the MAA if the orphan drug designation has been granted, 
but not if the designation is still pending at the time the marketing authorization is submitted, and sponsors must submit an annual report to 
EMA summarizing the status of development of the medicine. Orphan drug designation does not convey any advantage in, or shorten the 
duration of, the regulatory review and approval process.
New Chemical Entity Exclusivity 
In the EU, new chemical entities, or NCEs, sometimes referred to as new active substances, qualify for eight years of data exclusivity 
upon the product’s first MA in the EU and an additional two years of market exclusivity. This data exclusivity, if granted, prevents regulatory 
authorities in the EU from referencing the innovator’s data to assess a generic (abbreviated) application for eight years, after which generic 
marketing authorization can be submitted, and the innovator’s data may be referenced, but not approved for two years. The overall ten-year 
period will be extended to a maximum of eleven years if, during the first eight of those ten years, the marketing authorization holder obtains 
an authorization for one or more new therapeutic indications which, during the scientific evaluation prior to their authorization, are held to 
bring a significant clinical benefit in comparison with existing therapies. Products may not be granted data exclusivity since there is no 
guarantee that a product will be considered by the EU’s regulatory authorities to include an NCE. Even if a compound is considered to be a 
NCE and the MA applicant is able to gain the prescribed period of data exclusivity, another company could market a version of the medicinal 
product if such company can complete a full MAA with its own complete database of pharmaceutical tests, preclinical studies and clinical 
trials and obtain MA of its product.
Post-Approval Requirements 
Drugs manufactured or distributed pursuant to regulatory approvals are subject to pervasive and continuing regulation by the 
regulatory authorities, including, among other things, requirements relating to formal commitments for post approval clinical trials and studies, 
manufacturing, recordkeeping, periodic reporting, product sampling and distribution, marketing, labeling, advertising and promotion and 
reporting of adverse experiences with the product. After approval, most changes to the approved product, such as adding new indications or 
other labeling claims are subject to prior regulatory authority review and approval. 
Drug manufacturers are subject to periodic unannounced inspections by regulatory authorities and country or state agencies for 
compliance with GMP and other requirements. Changes to the manufacturing process are strictly regulated, and, depending on the 
significance of the change, may require prior regulatory approval before being implemented. Regulations also require investigation and 
correction of any deviations from GMP and impose reporting and documentation requirements upon us and any third-party manufacturers 
that we may decide to use. Accordingly, manufacturers must continue to expend time, money, and effort in the area of production and quality 
control to maintain compliance with GMP and other aspects of regulatory compliance. 
Pharmaceutical Coverage, Pricing and Reimbursement 
In the U.S. and markets in other countries, sales of any products for which we receive regulatory approval for commercial sale will 
depend in part on the availability of coverage and reimbursement from third-party payors. Third-party payors include government authorities, 
managed care providers, private health insurers and other organizations. The process for determining whether a payor will provide coverage 
for a drug product may be separate from the process for setting the reimbursement rate that the payor will pay for the drug product. Third-
party payors may limit coverage to specific drug products on an approved list, or formulary, which might not include all of the approved drugs 
for a particular indication. Moreover, a payor’s decision to provide coverage for a drug product does not imply that an adequate 
reimbursement rate will be approved. Adequate third-party reimbursement may not be available to enable us to maintain price levels 
sufficient to realize an appropriate return on our investment in product development. 
29
 
In the EU, governments influence the price of pharmaceutical products through their pricing and reimbursement rules and control of 
national health care systems that fund a large part of the cost of those products to patients. Some jurisdictions operate positive and negative 
list systems under which products may only be marketed once a reimbursement price has been agreed to by the government. Other member 
states allow companies to fix their own prices for medicines, but monitor and control company profits, including volume-based arrangements, 
caps and reference pricing mechanisms. In addition, in some countries, cross-border imports from low-priced markets exert a commercial 
pressure on pricing within a country.
Other Healthcare, Privacy, and Cybersecurity Laws and Compliance Requirements 
We are subject to various laws targeting, among other things, fraud and abuse in the healthcare industry, and privacy and protection of 
personal information, including health information. These laws may impact, among other things, our proposed sales, marketing, and 
education programs. The laws that may affect our ability to operate include: 
•
•
•
•
•
•
•
the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, receiving, 
offering, or paying remuneration, directly or indirectly, to induce, or in return for, the purchase or recommendation of an item or 
service reimbursable under a federal healthcare program, such as the Medicare and Medicaid programs; 
federal civil and criminal false claims laws and civil monetary penalty laws, which prohibit, among other things, individuals or 
entities from knowingly presenting, or causing to be presented, claims for payment from Medicare, Medicaid, or other third-party 
payers that are false or fraudulent; 
the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, as amended, which prohibits executing a 
scheme to defraud any healthcare benefit program and making false statements relating to healthcare matters and imposes 
certain requirements relating to the privacy, security, and transmission of individually identifiable health information; 
the EU General Data Protection Regulation, or GDPR, which applies to processing of personal data in the context of the activities 
of an establishment in the EEA, and to processing related to the offering of goods or services to individuals who are in the EEA, or 
the monitoring of individuals who are in the EEA, and imposes requirements and limitations relating to the processing, storage, 
purpose of collection, accuracy, security, sharing and transfer of personal data outside the EEA, in particular with respect to 
special categories of personal data like health data, and the notification of regulation authorities about data breaches, 
accompanied by a strong sanctioning mechanism; 
the 21st Century Cures Act, or the Cures Act, which introduced a wide range of reforms, such as broadening the types of data 
required to support drug approval, extending protections for generic competition, accelerating approval of breakthrough therapies, 
expanding the orphan drug product program, requiring disclosures about compassionate care programs, and clarifying how 
manufacturers communicate about their products;
the federal transparency laws, including the federal Physician Payment Sunshine Act, that requires drug manufacturers to 
disclose payments and other transfers of value provided to various healthcare professionals and teaching hospitals; and
state and foreign law equivalents, or similar, of each of the above federal laws, such as transparency laws, anti-kickback and false 
claims laws which may apply to items or services reimbursed by any third-party payer, including commercial insurers, and privacy 
and security of health information laws, including comprehensive privacy and security laws in California, and others taking effect in 
2023. 
Additional Regulation 
The U.S. Foreign Corrupt Practices Act or FCPA, to which we are subject, prohibits corporations and individuals from engaging in 
certain activities to obtain or retain business or to influence a person working in an official capacity. It is illegal to pay, offer to pay or authorize 
the payment of anything of value to any foreign government official, government staff member, political party, or political candidate in an 
attempt to obtain or retain business or to otherwise influence a person working in an official capacity. Similar laws exist in other countries, 
such as the United Kingdom or in EU member states, that restrict improper payments to public and private parties. Many countries have laws 
prohibiting these types of payments within the respective country. In addition to these anti-corruption laws, we are subject to import and 
export control laws, tariffs, trade barriers, economic sanctions, and regulatory limitations on our ability to operate in certain foreign markets.
In addition, federal, state, and foreign government bodies and agencies have adopted, are considering adopting, or may adopt laws 
and regulations regarding the collection, use, storage and disclosure of personally identifiable information or other information treated as 
confidential obtained from consumers and individuals.
30
 
We are also subject to regulation under the Occupational Safety and Health Act, the Environmental Protection Act, the Toxic 
Substances Control Act, the Resource Conservation and Recovery Act and other present and potential federal, state, or local regulations. 
These and other laws govern our use, handling and disposal of various biological and chemical substances used in, and waste generated by, 
our operations. Complying with these requirements may have a significant impact on our capital expenditures and results of operations.
Customers
Our customers include collaboration partners, drug wholesalers, and retail pharmacy distributors. For the year ended December 31, 
2022, more than half of our total revenues were generated under our collaboration agreement with KKC.
Human Capital
General Information
As of December 31, 2022, we had 1,311 total employees, of which 705 are in research and development and 606 are in sales, 
general, and administrative. Further, 1,155 are based in the U.S., including at our facilities in Novato, California, Brisbane, California, 
Cambridge, Massachusetts, and Woburn, Massachusetts, and 156 are based at our international locations. The majority of new employees 
hired during the year ended December 31, 2022 were to support and extend our clinical and preclinical pipeline as well as our 
commercialization activities, with hires in commercial, clinical development and operations, research, manufacturing, and general and 
administrative functions. We believe our relationship with our employees to be generally good. We have not experienced any material 
employment-related issues or interruptions of services due to labor disagreements and are not a party to any collective bargaining 
agreements. 
We expect to continue to add employees in 2023 with a focus on expanding our in-house manufacturing capacity in connection with 
completing construction of our gene therapy manufacturing facility, increasing expertise and bandwidth in clinical and preclinical research and 
development and commercialization activities and expanding our geographic reach in connection with the global launches of our approved 
products. We continually evaluate our business need and opportunity and balances in-house expertise and capacity with outsourced 
expertise and capacity. Currently, we outsource substantial clinical trial work to clinical research organizations and certain drug 
manufacturing to contract manufacturers.
Workforce Safety and Employee Wellbeing
We maintain a safety culture grounded on the premise of eliminating workplace incidents, risks and hazards. The COVID-19 pandemic 
provided an opportunity for us to demonstrate our commitment to the health and wellbeing of our employees. Effective as of January 3, 2022, 
we have required full vaccination against COVID-19 as a condition of employment at the company for almost all roles based in the U.S., with 
limited exceptions. We have adopted a flexible, hybrid working arrangement for employees, which allows some of our employees to work 
remotely during certain days of the week. To support our employees, we have provided collaboration tools and resources for employees 
working remotely, including training and toolkits to help leaders effectively lead and manage remote teams, expanded employees assistance 
and mindfulness programs to help employees and their families manage anxiety, stress, and overall wellbeing and increased investment in 
resources focused on inclusion and belonging.
Employee Retention and Engagement
The biotechnology industry is an extremely competitive labor market and we believe our company’s success depends on our ability to 
attract, develop, and retain key personnel. We invest in the growth and development of our employees through various training and 
development programs that build and strengthen employees’ leadership and professional skills, including leadership development programs 
for new leaders, as well as a mentoring program. We also have a talent management framework and processes in place that includes 
regularly conducted activities such as performance management, succession, and workforce planning in order to support our employees in 
their growth and development and to provide learning opportunities. We encourage all employees to have an individual development plan to 
identify focus areas for learning and growth.
To continually assess and improve our employee retention and engagement, we conduct an engagement survey approximately every 
18 months, with "pulse" surveys in between, the results of which are discussed with our board of directors, at all hands employee meetings 
and in individual functions. We take actions to address areas of employment concern and follow-up routinely to share with employees what 
we are doing.
31
 
Inclusion and Diversity
We strive toward having a diverse organization and are committed to equality, inclusion, and workplace diversity. As of December 31, 
2022, of the nine members of our board of directors, three directors were women, three directors self-identified as racially or ethnically 
diverse, and one director self-identified as LGBTQ+. As of December 31, 2022, women represented approximately 57% of our global 
workforce and approximately 45% of our leadership positions at the Vice President level or above. As of December 31, 2022, approximately 
45% of our U.S. workforce that self-reported identified as racially or ethnically diverse. We have included questions in our engagement 
survey to measure employee perception of our inclusive culture, with the results from such survey on inclusion and diversity included in our 
corporate goals for fiscal year 2022 and 2023. Our business units review diversity data related to hiring, promotions, and retention on an 
ongoing basis. We have also established an Inclusion and Diversity Action Team, or I&D Action Team, comprised of employee 
representatives throughout our company. Amongst other initiatives, our I&D Action Team engages in continual discussions across the various 
business functions to identify potential actions to address areas of improvement and is focused on building accountability across the 
organization to help us meet our diversity objectives. In our efforts to promote diversity and inclusion, we have established or supported 
several internal employee resource groups (ERGs), including UltraProud and X2 Women in Biotech. In 2022, we hosted an ERG Summit 
with the objective of bringing together leaders and members of these groups to share their experiences, learn from each other, collaborate on 
solutions, and network in order to make a greater impact on the company, its employees, and the wider community. 
Benefits and Compensation
We are dedicated to fostering a workplace environment that keeps our employees inspired, including providing a comprehensive 
benefits program that supports the health care, family, and financial needs of our employees. All of our full-time employees are eligible for 
cash bonuses and equity awards in addition to other benefits including comprehensive health insurance, life and disability insurance, 401(k) 
matching, paid time off for volunteering, wellness programs, and tuition reimbursement. We benchmark and tie compensation to market data 
as well as to an employee’s experience, function and performance. We regularly review our workforce compensation practices and strive for 
equity.
General Information 
Our Internet website address is www.ultragenyx.com. No portion of our website, or any other website that may be referenced, is 
incorporated by reference into this Annual Report.
You are advised to read this Annual Report in conjunction with other reports and documents that we file from time to time with the 
Securities and Exchange Commission, or the SEC. In particular, please read our definitive proxy statements, our Annual Reports on Form 
10-K, our Quarterly Reports on Form 10-Q and any Current Reports on Form 8-K that we may file from time to time. The SEC maintains 
information for electronic filers (including Ultragenyx) at its website at www.sec.gov. We make our annual reports on Form 10-K, our quarterly 
reports on Form 10-Q, and our current reports on Form 8-K, and amendments to those reports, available on our internet website, free of 
charge, as soon as reasonably practicable after such material is electronically filed with, or furnished to, the SEC.
32
 
Item 1A. Risk Factors 
Investing in our common stock involves a high degree of risk. You should carefully consider the following material risks, together with all the 
other information in this Annual Report, including our financial statements and notes thereto, before deciding to invest in our common stock. 
The risks and uncertainties described below are not the only ones we face. Additional risk and uncertainties not presently known to us or that 
we presently deem less significant may also impair our business operations. If any of the following risks actually materialize, our operating 
results, financial condition, and liquidity could be materially adversely affected. As a result, the trading price of our common stock could 
decline and you could lose part or all of your investment. Our company’s business, financial condition and operating results can be affected 
by a number of factors, whether currently known or unknown, including but not limited to those described below, any one or more of which 
could, directly or indirectly, cause our actual financial condition and operating results to vary materially from past, or from anticipated future, 
financial condition and operating results. Any of these factors, in whole or in part, could materially and adversely affect our business, 
prospects, financial condition, operating results and stock price. 
Because of the following factors, as well as other factors affecting our financial condition and operating results, past financial performance 
should not be considered to be a reliable indicator of future performance, and investors should not use historical trends to anticipate results 
or trends in future periods. 
Risk Factor Summary
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
We have a history of operating losses and anticipate that we will continue to incur losses for the foreseeable future.
We have limited experience in generating revenue from product sales. 
We expect to need to raise additional capital to fund our activities.
Clinical drug development is a lengthy, complex, and expensive process with uncertain outcomes. 
Adverse effects if we do not achieve our projected development goals in the time frames we announce and expect.
We may experience difficulty in enrolling patients.
The regulatory approval processes of the FDA and comparable foreign authorities are lengthy and inherently unpredictable. 
Fast Track Product, Breakthrough Therapy, Priority Review or RMAT Designations by the FDA, and analogous designations by 
the EMA, for our product candidates may not lead to faster development or approval. 
Our product candidates may cause undesirable or serious side effects.
We face a multitude of manufacturing risks, particularly with respect to our gene therapy and mRNA product candidates.
Our products remain subject to regulatory scrutiny even if we obtain regulatory approval.
Product liability lawsuits against us could cause us to incur substantial liabilities. 
We may not realize the full commercial potential of our product candidates if we are unable to source and develop effective 
biomarkers. 
We rely on third parties to conduct our nonclinical and clinical studies and perform other tasks for us. 
We are dependent on KKC for the clinical and commercial supply of Crysvita for all major markets and for the development and 
commercialization of Crysvita in certain major markets. 
We rely on third parties to manufacture our products and product candidates.
The loss of, or failure to supply by, any of any of our single-source suppliers for our drug substance and drug product could 
adversely affect our business.
The actions of distributors and specialty pharmacies could affect our ability to sell or market products profitably. 
Our revenue may be adversely affected if the market opportunities for our products and product candidates are smaller than 
expected. 
Our competitors may develop therapies that are similar, more advanced, or more effective than ours.
33
 
 
 
 
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
We may not successfully manage expansion of our company, including building an integrated commercial organization. 
Our exclusive rights to promote Crysvita in the U.S. and Canada will transition back to KKC.
Commercial success of our products depends on the degree of market acceptance.
We face uncertainty related to insurance coverage and reimbursement status of our newly approved products.
If we, or our third-party partners, are unable to maintain effective proprietary rights for our products or product candidates, we 
may not be able to compete effectively. 
Claims of intellectual property infringement may prevent or delay our development and commercialization efforts.
We may not be successful in obtaining or maintaining necessary rights to our product candidates through acquisitions and in-
licenses.
We may face competition from biosimilars of our biologics product and product candidates or from generic versions of our small-
molecule product and product candidates, which may result in a material decline in sales of affected products. 
We could lose license rights that are important to our business if we fail to comply with our obligations in the agreements under 
which we license intellectual property and other rights from third parties. 
We may become involved in lawsuits to protect or enforce our patents or the patents of our licensors, or be subject to claims that 
challenge the inventorship or ownership of our patents.
Changes in U.S. patent law could diminish the value of patents in general, thereby impairing our ability to protect our products. 
We may not be able to protect our intellectual property rights throughout the world. 
We have no experience as a company developing or operating a manufacturing facility.
Our success depends in part on our ability to retain our President and Chief Executive Officer and other qualified personnel.
Our revenue may be impacted if we fail to obtain or maintain orphan drug exclusivity for our products.
Our operating results may be adversely impacted if our intangible assets become impaired.
We may not be successful in identifying, licensing, developing, or commercializing additional product candidates.
We may fail to comply with laws and regulations or changes in laws and regulations could adversely affect our business.
We are exposed to risks related to international expansion of our business outside of the U.S.
Our business may be adversely affected in the event of computer system failures or security breaches.
We or our third-party partners may be adversely affected by earthquakes or other serious natural disasters.
We may incur various costs and expenses and risks related to acquisition of companies or products or strategic transactions.
The market price of our common stock is highly volatile. 
Future sales and issuances of our common stock could dilute the percentage ownership of our current stockholders and result in 
a decline in stock price.
Provisions in our amended and restated certificate of incorporation and by-laws, as well as provisions of Delaware law, could 
make it more difficult for a third party to acquire us or increase the cost of acquiring us or could limit our stockholders’ ability to 
obtain a favorable judicial forum for disputes with us or our directors, officers or employees.
We face general risks related to our ability to maintain effective internal controls over financial reporting, additional tax liabilities 
related to our operations, our ability to use our net operating loss carryforwards, costs of litigation, stockholder activism and 
increased scrutiny regarding our ESG practices and disclosures.
34
 
 
 
Risks Related to Our Financial Condition and Capital Requirements 
We have a history of operating losses and anticipate that we will continue to incur losses for the foreseeable future. 
We are a biopharmaceutical company with a history of operating losses, and anticipate continuing to incur operating losses for the 
foreseeable future. Biopharmaceutical product development is a highly speculative undertaking and involves a substantial degree of risk. We 
have devoted substantially all of our financial resources to identifying, acquiring, and developing our products and product candidates, 
including conducting clinical studies, developing manufacturing processes, manufacturing product candidates for clinical studies, and 
providing selling, general and administrative support for these operations. The amount of our future net losses will depend, in part, on non-
recurring events, the success of our commercialization efforts, and the rate of our future expenditures. We anticipate that our expenses will 
increase substantially if and as we: 
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
continue our research and nonclinical and clinical development of our product candidates; 
expand the scope of our current clinical studies for our product candidates; 
advance our programs into more expensive clinical studies; 
initiate additional nonclinical, clinical, or other studies for our product candidates; 
pursue preclinical and clinical development for additional indications for existing products and product candidates; 
change or add additional manufacturers or suppliers; 
expand upon or build our own manufacturing-related facilities and capabilities, including construction of our own GMP gene 
therapy manufacturing plant;
seek regulatory and marketing approvals for our product candidates that successfully complete clinical studies; 
continue to establish Medical Affairs field teams to initiate relevant disease education;
continue to establish a marketing and distribution infrastructure and field force to commercialize our products and any product 
candidates for which we may obtain marketing approval; 
continue to manage our international subsidiaries and establish new ones;
continue to operate as a public company and comply with legal, accounting and other regulatory requirements;
seek to identify, assess, license, acquire, and/or develop other product candidates, technologies, and/or businesses; 
make milestone or other payments under any license or other agreements; 
seek to maintain, protect, and expand our intellectual property portfolio; 
seek to attract and retain skilled personnel; 
create additional infrastructure, including facilities and systems, to support the growth of our operations, our product 
development, and our commercialization efforts; and
experience any delays or encounter issues with any of the above, including, but not limited to, failed studies, complex results, 
safety issues, inspection outcomes, or other regulatory challenges that require longer follow-up of existing studies, additional 
major studies, or additional supportive studies in order to pursue marketing approval. 
The net losses we incur may fluctuate significantly from quarter to quarter and year to year, such that a period-to-period comparison of our 
results of operations may not be a good indication of our future performance.
We have limited experience in generating revenue from product sales. 
Our ability to generate significant revenue from product sales depends on our ability, alone or with strategic collaboration partners, to 
successfully commercialize our products and to complete the development of, and obtain the regulatory and marketing approvals necessary 
to commercialize, our product candidates. Our ability to generate substantial future revenue from product sales, including named patient 
sales, depends heavily on our success in many areas, including, but not limited to: 
•
•
obtaining regulatory and marketing approvals with broad indications for product candidates for which we complete clinical 
studies; 
developing a sustainable and scalable manufacturing process for our products and any approved product candidates and 
establishing and maintaining supply and manufacturing relationships with third parties that can conduct the processes 
35
 
and provide adequate (in amount and quality) product supply to support market demand for our products and product 
candidates, if approved; 
launching and commercializing our products and product candidates for which we obtain regulatory and marketing approval, 
either directly or with a collaborator or distributor; 
obtaining market acceptance of our products and product candidates as viable treatment options; 
obtaining adequate market share, reimbursement and pricing for our products and product candidates;
our ability to sell our products and product candidates on a named patient basis or through an equivalent mechanism and the 
amount of revenue generated from such sales;
our ability to find patients so they can be diagnosed and begin receiving treatment;
addressing any competing technological and market developments; 
negotiating favorable terms, including commercial rights, in any collaboration, licensing, or other arrangements into which we 
may enter, any amendments thereto or extensions thereof; 
maintaining, protecting, and expanding our portfolio of intellectual property rights, including patents, trade secrets, and know-
how; and 
attracting, hiring, and retaining qualified personnel. 
•
•
•
•
•
•
•
•
•
If the number of our addressable rare disease patients is not as significant as we estimate, the indication approved by regulatory 
authorities is narrower than we expect, or the reasonably accepted population for treatment is narrowed by competition, physician choice, or 
treatment guidelines, or any other reasons, we may not generate significant revenue from sales of our products, even if they receive 
regulatory approval.
We expect to need to raise additional capital to fund our activities. This additional financing may not be available on acceptable 
terms, if at all. Failure to obtain this necessary capital when needed may force us to delay, limit, or terminate our product 
development efforts or other activities. 
As of December 31, 2022, our available cash, cash equivalents, and marketable debt securities were $896.7 million. We expect we will 
need additional capital to continue to commercialize our products, and to develop and obtain regulatory approval for, and to commercialize, 
all of our product candidates. In addition, our operating plans may change as a result of many factors that may currently be unknown to us, 
and we may need to seek additional funds sooner than planned. Our future funding requirements will depend on many factors, including but 
not limited to: 
•
•
•
•
•
•
•
•
•
the scope, rate of progress, results, and cost of our clinical studies, nonclinical testing, and other related activities; 
the cost of manufacturing clinical and commercial supplies of our products and product candidates; 
the cost of creating additional infrastructure, including facilities and systems, such as our GMP gene therapy manufacturing plant;
the number and characteristics of the product candidates that we pursue; 
the cost, timing, and outcomes of regulatory approvals; 
the cost and timing of establishing and operating our international subsidiaries;
the cost and timing of establishing and operating field forces, marketing, and distribution capabilities; 
the cost and timing of other activities needed to commercialize our products; and 
the terms and timing of any collaborative, licensing, acquisition, and other arrangements that we may establish, including any 
required milestone, royalty, and reimbursements or other payments thereunder. 
36
 
Any additional fundraising efforts may divert our management’s attention from their day-to-day activities, which can adversely affect 
our ability to develop our product candidates and commercialize our products. In addition, we cannot guarantee that future financing will be 
available in sufficient amounts or on terms acceptable to us, if at all, particularly in light of the current macroeconomic conditions, including 
the general economic slowdown and potential recessionary environment. The terms of any financing may adversely affect the holdings or the 
rights of our stockholders and the issuance of additional securities by us, whether equity or debt, or the possibility of such issuance, may 
cause the market price of our shares to decline. The sale of additional equity or convertible securities would dilute all of our stockholders. If 
we incur debt, it could result in increased fixed payment obligations and we may be required to agree to certain restrictive covenants, such as 
limitations on our ability to incur additional debt, limitations on our ability to acquire, sell, or license intellectual property rights, and other 
operating restrictions that could adversely impact our ability to conduct our business. We have in the past sought and may in the future seek 
funds through a sale of future royalty payments similar to our transactions with Royalty Pharma and OMERS or through collaborative 
partnerships, strategic alliances, and licensing or other arrangements, such as our transaction with Daiichi Sankyo, and we may be required 
to relinquish rights to some of our technologies or product candidates, future revenue streams, research programs, and other product 
candidates or otherwise agree to terms unfavorable to us, any of which may have a material adverse effect on our business, operating 
results, and prospects. Even if we believe we have sufficient funds for our current or future operating plans, we may seek additional capital if 
market conditions are favorable or if we have specific strategic considerations.
If we are unable to obtain funding on a timely basis, or at all, we may be required to significantly curtail, delay, or discontinue one or 
more of our research or development programs or the commercialization of our products and any approved product candidates or be unable 
to expand our operations or otherwise capitalize on our business opportunities, as desired, which could materially affect our business, 
financial condition, and results of operations. 
Risks Related to the Discovery and Development of Our Product Candidates 
Clinical drug development involves a lengthy, complex, and expensive process with uncertain outcomes and the potential for 
substantial delays, and the results of earlier studies may not be predictive of future study results. 
Before obtaining marketing approval from regulatory authorities for the sale of our product candidates, we must conduct extensive 
clinical studies to demonstrate the safety and efficacy of the product candidates in humans. Clinical testing is expensive, complex, time 
consuming, and uncertain as to outcome. We cannot guarantee that any clinical studies will be conducted as planned or completed on 
schedule, if at all. Our clinical trial activities, including the initiation and completion of such activities and the timing thereof, have been and 
are expected to continue to be significantly delayed or disrupted by COVID-19. The pandemic has impacted enrollment of patients in certain 
of our clinical trials and has required us to change the way certain of our clinical trials are conducted. Healthcare resources have been and 
may continue to be diverted away from the conduct of clinical trials, such as the diversion of hospitals serving as our clinical trial sites, in 
response to the COVID-19 pandemic and resurgences or mutations of the virus. We have also had difficulties in recruiting clinical site 
investigators and clinical staff for our studies, and may continue to experience such difficulties. Additionally, a failure of one or more clinical 
studies can occur at any stage of testing, and our future clinical studies may not be successful. Product candidates that have shown 
promising results in early-stage clinical studies may still suffer significant setbacks or fail in subsequent clinical studies. The safety or efficacy 
results generated to date in clinical studies do not ensure that later clinical studies will demonstrate similar results. Further, we have reported 
and expect to continue to report preliminary or interim data from our clinical trials. Preliminary or interim data from our clinical trials are 
subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and/or more patient data 
become available. Such data may show initial evidence of clinical benefit, but as patients continue to be assessed and more patient data 
become available, there is a risk that any therapeutic effects are no longer durable in patients and/or decrease over time or cease entirely. As 
a result, preliminary or interim data should be considered carefully and with caution until the final data are available. Results from 
investigator-sponsored studies or compassionate-use studies may not be confirmed in company-sponsored studies or may negatively impact 
the prospects for our programs. Additionally, given the nature of the rare diseases we are seeking to treat, we often devise newly-defined 
endpoints to be tested in our studies, which can lead to subjectivity in interpreting study results and could result in regulatory agencies not 
agreeing with the validity of our endpoints, or our interpretation of the clinical data, and therefore delaying or denying approval. Given the 
illness of the patients in our studies and the nature of their rare diseases, we may also be required or choose to conduct certain studies on an
open-label basis. We have in the past, and may in the future elect to review interim clinical data at multiple time points during the studies, 
which could introduce bias into the study results and potentially result in denial of approval. 
In the biopharmaceutical industry, there is a high failure rate for drugs and biologics proceeding through clinical studies, and product 
candidates in later stages of clinical studies may fail to show the desired safety and efficacy despite having progressed through nonclinical 
studies and initial clinical studies. A number of companies in the biopharmaceutical industry have suffered significant setbacks in advanced 
clinical studies due to lack of efficacy or adverse safety profiles, notwithstanding promising results in earlier studies. 
37
 
Scenarios that can prevent successful or timely completion of clinical development include but are not limited to:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
delays or failures in generating sufficient preclinical, toxicology, or other in vivo or in vitro data to support the initiation or 
continuation of human clinical studies or filings for regulatory approval; 
failure to demonstrate a starting dose for our product candidates in the clinic that might be reasonably expected to result in a 
clinical benefit;
delays or failures in developing gene therapy, messenger RNA, or mRNA, DNA, small interfering RNA, or siRNA, or other novel 
and complex product candidates, which are expensive and difficult to develop and manufacture;
delays resulting from a shutdown, or uncertainty surrounding the potential for future shutdowns of the U.S. government, including 
the FDA;
delays or failures in reaching a consensus with regulatory agencies on study design; 
delays in reaching agreement on acceptable terms with contract research organizations, or CROs, clinical study sites, and other 
clinical trial-related vendors; 
failure or delays in obtaining required regulatory agency approval and/or IRB or EC approval at each clinical study site or in 
certain countries; 
failure to correctly design clinical studies which may result in those studies failing to meet their endpoints or the expectations of 
regulatory agencies;
changes in clinical study design or development strategy resulting in delays related to obtaining approvals from IRBs or ECs 
and/or regulatory agencies to proceed with clinical studies; 
imposition of a clinical hold by regulatory agencies after review of an IND application or amendment, another equivalent 
application or amendment, or an inspection of our clinical study operations or study sites; 
delays in recruiting suitable patients to participate in our clinical studies; 
difficulty collaborating with patient groups and investigators; 
failure by our CROs, other third parties, or us to adhere to clinical study requirements; 
failure to perform in accordance with the FDA’s and/or ICH’s good clinical practices requirements or applicable regulatory 
guidelines in other countries; 
delays in patients’ completion of studies or their returns for post-treatment follow-up; 
patients dropping out of a study; 
adverse events associated with the product candidate occurring that are viewed to outweigh its potential benefits; 
changes in regulatory requirements and guidance that require amending or submitting new clinical protocols; 
greater than anticipated costs associated with clinical studies of our drug candidates, including as a result of hyperinflation; 
clinical studies of our drug candidates producing negative or inconclusive results, which may result in us deciding, or regulators 
requiring us, to conduct additional clinical or nonclinical studies or to abandon drug development programs; 
competing clinical studies of potential alternative product candidates or investigator-sponsored studies of our product candidates; 
and 
delays in manufacturing, testing, releasing, validating, or importing/exporting sufficient stable quantities of our product candidates 
for use in clinical studies or the inability to do any of the foregoing.
Any inability to successfully complete nonclinical and clinical development could result in additional costs to us or negatively impact our 
ability to generate revenue. In addition, if we make manufacturing or formulation changes to our product candidates, we may need to conduct 
additional toxicology, comparability or other studies to bridge our modified product candidates to earlier versions. Clinical study delays could 
also shorten any periods during which our products have commercial exclusivity and may allow our competitors to bring products to market 
before we do, which could negatively impact our ability to obtain orphan exclusivity and to successfully commercialize our product candidates 
and may harm our business and results of operations.
38
 
If we do not achieve our projected development goals in the time frames we announce and expect, the commercialization of our 
products may be delayed and the credibility of our management may be adversely affected and, as a result, our stock price may 
decline.
For planning purposes, we estimate the timing of the accomplishment of various scientific, clinical, regulatory, and other product 
development goals, which we sometimes refer to as milestones. These milestones may include the commencement or completion of 
scientific studies and clinical trials, the timing of patient dosing, the timing, type or clarity of data from clinical trials, the submission or 
acceptance of regulatory filings, and the potential approval of such regulatory filings. We periodically make public announcements about the 
expected timing of some of these milestones. All of these milestones are based on a variety of assumptions, but the actual timing of these 
milestones can vary dramatically from our estimates. If we do not meet these publicly announced milestones, the commercialization of our 
products may be delayed and the credibility of our management may be adversely affected and, as a result, our stock price may decline.
We may find it difficult to identify and enroll patients in our clinical studies due to a variety of factors, including the limited number 
of patients who have the diseases for which our product candidates are being studied and other unforeseen events, such as the 
COVID-19 pandemic. Difficulty in enrolling patients could delay or prevent clinical studies of our product candidates. 
Identifying and qualifying patients to participate in clinical studies of our product candidates is critical to our success. The timing of our 
clinical studies depends in part on the speed at which we can recruit patients to participate in testing our product candidates, and we may 
experience delays in our clinical studies if we encounter difficulties in enrollment. 
Each of the conditions for which we plan to evaluate our current product candidates is a rare genetic disease. Accordingly, there are 
limited patient pools from which to draw for clinical studies. For example, we estimate that approximately 6,000 patients worldwide suffer 
from GSDIa, for which DTX401 is being studied, and these all may not be treatable if they are immune to the AAV viral vector. 
In addition to the rarity of these diseases, the eligibility criteria of our clinical studies will further limit the pool of available study 
participants as we will require patients to have specific characteristics that we can measure or to assure their disease is either severe enough 
or not too advanced to include them in a study. The process of finding and diagnosing patients is costly and time-consuming, especially since 
the rare diseases we are studying are commonly underdiagnosed. We also may not be able to identify, recruit, and enroll a sufficient number 
of appropriate patients to complete our clinical studies because of demographic criteria for prospective patients, the perceived risks and 
benefits of the product candidate under study, the proximity and availability of clinical study sites for prospective patients, and the patient 
referral practices of physicians. Additionally, the COVID-19 pandemic has impacted enrollment of patients in certain of our clinical trials for 
our product candidates as patients have been more reluctant to conduct in-person visits at the sites due to concerns over COVID-19. The 
availability and efficacy of competing therapies and clinical studies can also adversely impact enrollment. If patients are unwilling to 
participate in our studies for any reason (such as drug-related side effects), the timeline for and our success in recruiting patients, conducting 
studies, and obtaining regulatory approval of potential products may be delayed or impaired, the commercial prospects of our product 
candidates will be harmed, and our ability to generate product revenue from any of these product candidates could be delayed or prevented. 
Delays in completing our clinical studies will increase our costs, slow down our product candidate development and approval process, and 
jeopardize our ability to commence product sales and generate revenue. 
39
 
The regulatory approval processes of the FDA and comparable foreign authorities are lengthy, time consuming, and inherently 
unpredictable. Even if we achieve positive results in our pre-clinical and clinical studies, if we are ultimately unable to obtain timely 
regulatory approval for our product candidates, our business will be substantially harmed.
Our future success is dependent on our ability to successfully commercialize our products and develop, obtain regulatory approval 
for, and then successfully commercialize one or more product candidates. We are not permitted to market or promote any of our product 
candidates before we receive regulatory approval from the FDA or comparable foreign regulatory authorities. We have only obtained 
regulatory approval for three products that we have developed, and it is possible that none of our existing product candidates or any product 
candidates we may seek to develop in the future will ever obtain regulatory approval. Further, as the clinical trial requirements of regulatory 
authorities and the criteria these regulators use to determine the safety and efficacy of a product candidate vary substantially according to the 
type, complexity, novelty and intended use and market of the product candidates, the regulatory approval process for novel product 
candidates, such as our gene therapy product candidates, can be more expensive and take longer than for other product candidates, leading 
to fewer product approvals. To date, very few gene therapy products have received regulatory approval in the U.S. or Europe. The regulatory 
framework and oversight over development of gene therapy products has evolved and may continue to evolve in the future. Within the FDA, 
the Center for Biologics Evaluation and Research, or CBER, regulates gene therapy products. Within the CBER, the review of gene therapy 
and related products is consolidated in the Office of Cellular, Tissue and Gene Therapies, and the FDA has established the Cellular, Tissue 
and Gene Therapies Advisory Committee to advise CBER on its reviews. The CBER works closely with the National Institutes of Health, or 
NIH. The FDA and the NIH have published guidance with respect to the development and submission of gene therapy protocols. For 
example, in January 2020, the FDA issued final guidance to set forth the framework for the development, review and approval of gene 
therapies. The final guidance pertains to the development of gene therapies for the treatment of specific disease categories, including rare 
diseases, and to manufacturing and long-term follow up issues relevant to gene therapy, among other topics. At the same time the FDA 
issued new draft guidance describing the FDA’s approach for determining whether two gene therapy products were the same or different for 
the purpose of assessing orphan drug exclusivity; the draft guidance was finalized by the FDA in September 2021. Within the European 
Medicines Agency, or EMA, special rules apply to gene therapy and related products as they are considered advanced therapy medicinal 
products, or ATMPs. Pursuant to the ATMP Regulation, the Committee on Advanced Therapies, or CAT, is responsible in conjunction with the 
Committee for Medicinal Products for Human Use, or CHMP, for the evaluation of ATMPs. The CHMP and CAT are also responsible for 
providing guidelines on ATMPs. These guidelines provide additional guidance on the factors that the EMA will consider in relation to the 
development and evaluation of ATMPs and include, among other things, the preclinical studies required to characterize ATMPs. The 
manufacturing and control information that should be submitted in a MAA; and post-approval measures required to monitor patients and 
evaluate the long-term efficacy and potential adverse reactions of ATMPs. Although such guidelines are not legally binding, compliance with 
them is often necessary to gain and maintain approval for product candidates. In addition to the mandatory risk-management plan, or RMP, 
the holder of a marketing authorization for an ATMP must put in place and maintain a system to ensure that each individual product and its 
starting and raw materials, including all substances coming into contact with the cells or tissues it may contain, can be traced through the 
sourcing, manufacturing, packaging, storage, transport, and delivery to the relevant healthcare institution where the product is used.
To obtain regulatory approval in the U.S. and other jurisdictions, we must comply with numerous and varying requirements regarding 
safety, efficacy, chemistry, manufacturing and controls, clinical studies (including good clinical practices), commercial sales, pricing, and 
distribution of our product candidates, as described above in “Item 1. Business – Government Regulation”. Even if we are successful in 
obtaining approval in one jurisdiction, we cannot ensure that we will obtain approval in any other jurisdictions. In addition, approval policies, 
regulations, positions of the regulatory agencies on study design and/or endpoints, or the type and amount of clinical data necessary to gain 
approval may change during the course of a product candidate’s clinical development, which may cause delays in the approval or the 
decision not to approve an application. Communications with the regulatory agencies during the approval process are also unpredictable; 
favorable communications early in the process do not ensure that approval will be obtained and unfavorable communications early on do not 
guarantee that approval will be denied. Applications for our product candidates could fail to receive regulatory approval, or could be delayed 
in receiving regulatory approval, for many reasons, including but not limited to the following: 
•
•
•
•
•
regulatory authorities may disagree with the design, implementation, or conduct of our clinical studies; 
regulatory authorities may change their guidance or requirements for a development program for a product candidate;
the population studied in the clinical program may not be sufficiently broad or representative to assure efficacy and safety in the 
full population for which we seek approval; 
regulatory authorities may disagree with our interpretation of data from nonclinical studies or clinical studies; 
the data collected from clinical studies of our product candidates may not be sufficient to support the submission of an NDA, or 
biologics license application, or BLA, or other submission or to obtain regulatory approval; 
40
 
•
•
•
•
•
•
we may be unable to demonstrate to regulatory authorities that a product candidate’s risk-benefit ratio for its proposed indication 
is acceptable; 
regulatory authorities may fail to approve the manufacturing processes, test procedures and specifications, or facilities used to 
manufacture our clinical and commercial supplies; 
the U.S. government may be shut down, which could delay the FDA;
the FDA may be delayed in responding to our applications or submissions due to competing priorities or limited resources, 
including as a result of the COVID-19 pandemic, lack of FDA funding or personnel;
failure of our nonclinical or clinical development to comply with an agreed upon Pediatric Investigational Plan, or PIP, which details 
the designs and completion timelines for nonclinical and clinical studies and is a condition of marketing authorization in the EU; 
and 
the approval policies or regulations of regulatory authorities may significantly change in a manner rendering our clinical data 
insufficient for approval. 
Furthermore, the disease states we are evaluating often do not have clear regulatory paths for approval and/or do not have validated 
outcome measures. In these circumstances, we work closely with the regulatory authorities to define the approval path and may have to 
qualify outcome measures as part of our development programs. Additionally, many of the disease states we are targeting are highly 
heterogeneous in nature, which may impact our ability to determine the treatment benefit of our potential therapies. 
This lengthy and uncertain approval process, as well as the unpredictability of the clinical and nonclinical studies, may result in our 
failure to obtain regulatory approval to market any of our product candidates, or delayed regulatory approval. 
Fast Track, Breakthrough Therapy, Priority Review, or Regenerative Medicine Advanced Therapy, or RMAT, designation by the FDA, 
or access to the Priority Medicine scheme, or PRIME, by the EMA, for our product candidates, if granted, may not lead to faster 
development or regulatory review or approval process, and it does not increase the likelihood that our product candidates will 
receive marketing approval. 
As described in “Item 1. Business – Government Regulation”, we may seek Fast Track, Breakthrough Therapy designation, RMAT 
Designation, PRIME scheme access or Priority Review designation for our product candidates if supported by the results of clinical trials. 
Designation as a Fast Track product, Breakthrough Therapy, RMAT, PRIME, or Priority Review product is within the discretion of the relevant 
regulatory agency. Accordingly, even if we believe one of our product candidates meets the criteria for designation as a Fast Track product, 
Breakthrough Therapy, RMAT, PRIME, or Priority Review product, the agency may disagree and instead determine not to make such 
designation. The receipt of such a designation for a product candidate also may not result in a faster development process, review or 
approval compared to drugs considered for approval under conventional regulatory procedures and does not assure that the product will 
ultimately be approved by the regulatory authority. In addition, regarding Fast Track products and Breakthrough Therapies, the FDA may later 
decide that the products no longer meet the conditions for qualification as either a Fast Track product, RMAT, or a Breakthrough Therapy or, 
for Priority Review products, decide that period for FDA review or approval will not be shortened. Furthermore, with respect to PRIME 
designation by the EMA, PRIME eligibility does not change the standards for product approval, and there is no assurance that any such 
designation or eligibility will result in expedited review or approval.
The FDA Rare Pediatric Disease Priority Review Voucher Program, or PRV Voucher Program, awards Priority Review Vouchers, or 
PRVs, to sponsors of rare pediatric product applications that meet certain criteria. Under the program, a company that receives an approval 
for a product for a rare pediatric disease (as determined by the applicable regulations) may qualify for a PRV that can be redeemed to 
receive Priority Review of a subsequent marketing application for a different product. PRVs may also be sold by the company to third parties. 
We received PRVs under the PRV Voucher Program in connection with the approval of Mepsevii and Crysvita in 2018 and subsequently sold 
these two PRVs to third parties for an average amount of $105.3 million for each PRV. The current PRV Voucher Program is scheduled to 
sunset such that the FDA may only award a PRV for a product application if a company receives the rare pediatric disease designation from 
the FDA for the product candidate by September 30, 2024, and the FDA will cease awarding PRVs after September 30, 2026. Extension of 
the current PRV Voucher Program is subject to approval by Congress and it is currently uncertain whether the program will be extended. If 
our qualifying product candidates are approved by the FDA after the current approval deadlines, we will not be eligible to receive additional 
PRVs for our product candidates and accordingly, we would be unable to use such PRV for Priority Review for another one of our programs 
or to sell such PRV, which sale has the potential to generate significant proceeds.
41
 
Our product candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory 
approval, limit the commercial profile of an approved label, or result in significant negative consequences following marketing 
approval, if any. 
Undesirable side effects caused by our product candidates could cause us or regulatory authorities to interrupt, delay, or halt clinical 
studies or further development, and could result in a more restrictive label, the delay or denial of regulatory approval by the FDA or other 
comparable foreign authorities, or a Risk Evaluation and Mitigation Strategy, or REMS, plan, which could include a medication guide outlining 
the risks of such side effects for distribution to patients, restricted distribution, a communication plan for healthcare providers, and/or other 
elements to assure safe use. Our product candidates are in development and the safety profile has not been established. Further, as one of 
the goals of Phase 1 and/or 2 clinical trials is to identify the highest dose of treatment that can be safely provided to study participants, 
adverse side effects, including serious adverse effects, have occurred in certain studies as a result of changes to the dosing regimen during 
such studies and may occur in future studies. Results of our studies or investigator-sponsored trials could reveal a high and unacceptable 
severity and prevalence of these or other side effects. In such an event, our studies could be suspended or terminated, and the FDA or 
comparable foreign regulatory authorities could order us to cease further development of or deny or withdraw approval of our product 
candidates for any or all targeted indications. 
Additionally, notwithstanding our prior or future regulatory approvals for our product candidates, if we or others later identify 
undesirable side effects caused by such products, a number of potentially significant negative consequences could result, including but not 
limited to:
•
•
•
•
•
regulatory authorities may withdraw approvals of such product; 
regulatory authorities may require additional warnings on the product’s label or restrict the product’s approved use; 
we may be required to create a REMS plan; 
patients and physicians may elect not to use our products, or reimbursement authorities may elect not to reimburse for them; and 
our reputation may suffer. 
Any of these events could prevent us from achieving or maintaining market acceptance of the particular product candidate, if 
approved. 
Serious adverse events in clinical trials involving gene therapy product candidates may damage public perception of the safety of 
our product candidates, increase government regulation, and adversely affect our ability to obtain regulatory approvals for our 
product candidates or conduct our business.
Gene therapy remains a novel technology. Public perception may be influenced by claims that gene therapy is unsafe, and gene 
therapy may not gain the acceptance of the public or the medical community. For example, certain gene therapy trials using AAV8 vectors 
(although at significantly higher doses than those used in our gene therapy product candidates) and other vectors led to several well-
publicized adverse events, including cases of leukemia and death. The risk of cancer or death remains a concern for gene therapy and we 
cannot assure you that it will not occur in any of our planned or future clinical studies. In addition, there is the potential risk of delayed 
adverse events following exposure to gene therapy products due to persistent biological activity of the genetic material or other components 
of products used to carry the genetic material. Serious adverse events in our clinical trials, or other clinical trials involving gene therapy 
products, particularly AAV gene therapy products such as candidates based on the same capsid serotypes as our product candidates, or 
occurring during use of our competitors’ products, even if not ultimately attributable to the relevant product candidates, and the resulting 
publicity, could result in increased government regulation, unfavorable public perception, potential regulatory delays in the testing or approval 
of our gene therapy product candidates, stricter labeling requirements for those gene therapy product candidates that are approved and a 
decrease in demand for any such gene therapy product candidates.
Gene therapy and mRNA, DNA and siRNA product candidates are novel, complex, expensive and difficult to manufacture. We could 
experience manufacturing problems that result in delays in developing and commercializing these programs or otherwise harm our 
business. 
The manufacturing process used to produce our gene therapy, mRNA, DNA and siRNA product candidates is novel, complex, and has 
not been validated for commercial use. Several factors could cause production interruptions, including equipment malfunctions, malfunctions 
of internal information technology systems, regulatory inspections, facility contamination, raw material shortages or contamination, natural 
disasters, geopolitical instability, the COVID-19 pandemic, disruption in utility services, human error or disruptions in the operations of our 
suppliers. Further, given that cGMP gene therapy, mRNA, DNA and siRNA manufacturing is a nascent industry, there are a small number of 
CMOs with the experience necessary to manufacture our gene therapy product 
42
 
candidates and we may have difficulty finding or maintaining relationships with such CMOs or hiring experts for internal manufacturing and 
accordingly, our production capacity may be limited.
Our gene therapy, mRNA, DNA and siRNA product candidates require processing steps that are more complex than those required for 
most small molecule drugs. Moreover, unlike small molecules, the physical and chemical properties of a biologic such as gene therapy, 
mRNA, DNA and siRNA product candidates generally cannot be fully characterized. As a result, assays of the finished product candidate 
may not be sufficient to ensure that the product candidate is consistent from lot to lot or will perform in the intended manner. Accordingly, we 
employ multiple steps to control the manufacturing process to assure that the process works reproducibly, and the product candidate is made 
strictly and consistently in compliance with the process. Problems with the manufacturing process, even minor deviations from the normal 
process, could result in product defects or manufacturing failures that result in lot failures, noncompliance with regulatory requirements, 
product recalls, product liability claims or insufficient inventory. We may encounter problems achieving adequate quantities and quality of 
clinical-grade materials that meet FDA, the EMA or other applicable standards or specifications with consistent and acceptable production 
yields and costs.
In addition, FDA, the EMA and other foreign regulatory authorities may require us to submit samples of any lot of any approved 
product together with the protocols showing the results of applicable tests at any time. Under some circumstances, FDA, the EMA or other 
foreign regulatory authorities may require that we not distribute a lot until the agency authorizes its release. Slight deviations in the 
manufacturing process, including those affecting quality attributes and stability, may result in unacceptable changes in the product that could 
result in lot failures or product recalls. Lot failures or product recalls could cause us to delay product launches or clinical trials, which could be 
costly to us and otherwise harm our business, financial condition, results of operations and prospects. 
Even if we obtain regulatory approval for our product candidates, our products remain subject to regulatory scrutiny. 
Our products and any product candidates that are approved in the future remain subject to ongoing regulatory requirements for 
manufacturing, labeling, packaging, storage, distribution, advertising, promotion, sampling, record-keeping, conduct of post-marketing 
studies, and submission of safety, efficacy, and other post-market information, including both federal and state requirements in the U.S. and 
requirements of comparable foreign regulatory authorities, as described above in “Item 1. Business – Government Regulation.” 
Manufacturers and manufacturers’ facilities are required to comply with extensive FDA, and comparable foreign regulatory authority, 
requirements, including ensuring that quality control and manufacturing procedures conform to Good Manufacturing Practices, or GMP, 
regulations. As such, we and our contract manufacturers are subject to continual review and inspection to assess compliance with GMP and 
adherence to commitments made in any NDA, BLA, MAA, or other comparable application for approval in another jurisdiction. Regulatory 
authorities may, at any time, audit or inspect a manufacturing facility involved with the preparation of our products, product candidates or the 
associated quality systems for compliance with the regulations applicable to the activities being conducted. If we, our collaborators, such as 
KKC or Regeneron, or any of our third-party manufacturers fail to maintain regulatory compliance, the FDA or other applicable regulatory 
authority can impose regulatory sanctions including, among other things, the temporary or permanent suspension of a clinical study or 
commercial sales, recalls or seizures of product or the temporary or permanent closure of a facility or withdrawal of product approval. If 
supply from one approved manufacturer is interrupted due to failure to maintain regulatory compliance, an alternative manufacturer would 
need to be qualified through an NDA or BLA supplement or MAA variation, or equivalent foreign regulatory filing, which could result in delays 
in product supply. The regulatory agencies may also require additional studies if a new manufacturer, material, testing method or standard is 
relied upon for commercial production. Switching manufacturers, materials, test methods or standards may involve substantial costs and may 
result in a delay in our desired clinical and commercial timelines. Accordingly, we and others with whom we work are required continue to 
expend time, money, and effort in all areas of regulatory compliance, including manufacturing, production, and quality control.
Any regulatory approvals that we receive for our product candidates may be subject to limitations on the approved indicated uses for 
which the product may be marketed or other conditions of approval, or contain requirements for potentially costly post-marketing testing, 
including Phase 4 clinical studies, and surveillance to monitor the safety and efficacy of the product candidate. We could also be asked to 
conduct post-marketing clinical studies to verify the safety and efficacy of our products in general or in specific patient subsets. If original 
marketing approval was obtained via the accelerated approval or conditional marketing authorization pathways, we would be required to 
conduct a successful post-marketing clinical study to confirm clinical benefit for our products. An unsuccessful post-marketing study or failure 
to complete such a study could result in the withdrawal of marketing approval. We will be required to report certain adverse events and 
manufacturing problems, if any, to the FDA and comparable foreign regulatory authorities. The holder of an approved NDA, BLA, MAA, or 
other comparable application must submit new or supplemental applications and obtain approval for certain changes to the approved 
product, product labeling, or manufacturing process. 
43
 
If we fail to comply with applicable regulatory requirements, or there are safety or efficacy problems with a product, a regulatory 
agency or enforcement authority may, among other things: 
•
•
•
•
•
•
•
•
issue warning or notice of violation letters; 
impose civil or criminal penalties; 
suspend or withdraw regulatory approval; 
suspend any of our ongoing clinical studies; 
refuse to approve pending applications or supplements to approved applications submitted by us; 
impose restrictions on our operations, including closing our contract manufacturers’ facilities; 
seize or detain products, or require a product recall; or
require entry into a consent decree.
Any government investigation of alleged violations of law could require us to expend significant time and resources in response, and 
could generate negative publicity. Any failure to comply with ongoing regulatory requirements may significantly and adversely affect our 
ability to commercialize and generate revenue from our products. If regulatory sanctions are applied or if regulatory approval is withdrawn, 
the value of our company and our operating results will be adversely affected. 
Product liability lawsuits against us could cause us to incur substantial liabilities and could limit commercialization of our 
approved products or product candidates. 
We face an inherent risk of product liability exposure related to the testing of our approved products and product candidates in human 
clinical trials, as well as in connection with commercialization of our current and future products. If we cannot successfully defend ourselves 
against claims that any of our approved products or product candidates caused injuries, we could incur substantial liabilities. There can be no 
assurance that our product liability insurance, which provides coverage in the amount of $15.0 million in the aggregate, will be sufficient in 
light of our current or planned clinical programs. We may not be able to maintain insurance coverage at a reasonable cost or in sufficient 
amounts to protect us against losses due to liability, or losses may exceed the amount of insurance that we carry. A product liability claim or 
series of claims brought against us could cause our stock price to decline and, if judgments exceed our insurance coverage, could adversely 
affect our results of operations and business. In addition, regardless of merit or eventual outcome, product liability claims may result in 
impairment of our business reputation, withdrawal of clinical study participants, costs due to related litigation, distraction of management’s 
attention from our primary business, initiation of investigations by regulators, substantial monetary awards to patients or other claimants, the 
inability to commercialize our product candidates, and decreased demand for our product candidates, if approved for commercial sale.
If we are unable to identify, source, and develop effective biomarkers, or our collaborators are unable to successfully develop and 
commercialize companion diagnostics for our product candidates, or experience significant delays in doing so, we may not realize 
the full commercial potential of our product candidates.
We are developing companion diagnostic tests to identify the right patients for certain of our product candidates and to monitor 
response to treatment. In certain cases, diagnostic tests may need to be developed as companion diagnostics and regulatory approval 
obtained in order to commercialize some product candidates. We currently use and expect to continue to use biomarkers to identify the right 
patients for certain of our product candidates. We may also need to develop predictive biomarkers in the future. We can offer no assurances 
that any current or future potential biomarker will in fact prove predictive, be reliably measured, or be accepted as a measure of efficacy by 
the FDA or other regulatory authorities. In addition, our success may depend, in part, on the development and commercialization of 
companion diagnostics. We also expect the FDA will require the development and regulatory approval of a companion diagnostic assay as a 
condition to approval of our gene therapy product candidates. There has been limited success to date industrywide in developing and 
commercializing these types of companion diagnostics. Development and manufacturing of companion diagnostics is complex and there are 
limited manufacturers with the necessary expertise and capability. Even if we are able to successfully develop companion diagnostics, we 
may not be able to manufacture the companion diagnostics at a cost or in quantities or on timelines necessary for use with our product 
candidates. To be successful, we need to address a number of scientific, technical and logistical challenges. We are currently working with a 
third party to develop companion diagnostics, however, we have little experience in the development and commercialization of diagnostics 
and may not ultimately be successful in developing and commercializing appropriate diagnostics to pair with any of our product candidates 
that receive marketing approval. We rely on third parties for the automation, characterization and validation, of our bioanalytical assays, 
companion diagnostics and the manufacture of its critical reagents. 
44
 
Companion diagnostics are subject to regulation by FDA and similar regulatory authorities outside the U.S. as medical devices and 
require regulatory clearance or approval prior to commercialization. In the U.S., companion diagnostics are cleared or approved through 
FDA’s 510(k) premarket notification or premarket approval, or PMA, process. Changes in marketing approval policies during the development 
period, changes in or the enactment of additional statutes or regulations, or changes in regulatory review for each submitted 510(k) 
premarket notification, PMA or equivalent application types in jurisdictions outside the U.S., may cause delays in the approval, clearance or 
rejection of an application. Given our limited experience in developing and commercializing diagnostics, we expect to rely in part or in whole 
on third parties for companion diagnostic design and commercialization. We and our collaborators may encounter difficulties in developing 
and obtaining approval or clearance for the companion diagnostics, including issues relating to selectivity/specificity, analytical validation, 
reproducibility, or clinical validation. Any delay or failure by us or our collaborators to develop or obtain regulatory approval of the companion 
diagnostics could delay or prevent approval of our product candidates.
Risks Related to our Reliance on Third Parties 
We rely on third parties to conduct our nonclinical and clinical studies and perform other tasks for us. If these third parties do not 
successfully carry out their contractual duties, meet expected deadlines, or comply with regulatory requirements, we may be 
exposed to sub-optimal quality and reputational harm, we may not be able to obtain regulatory approval for or commercialize our 
product candidates, and our business could be substantially harmed. 
We have relied upon and plan to continue to rely upon third parties, including CROs, collaborative partners, and independent 
investigators to analyze, collect, monitor, and manage data for our ongoing nonclinical and clinical programs. We rely on third parties for 
execution of our nonclinical and clinical studies, and for estimates regarding costs and efforts completed, and we control only certain aspects 
of their activities. We and our CROs and other vendors and partners are required to comply with GMP, GCP, and GLP, which are regulations 
and guidelines enforced by the FDA, the Competent Authorities of the Member States of the European Economic Area, and comparable 
foreign regulatory authorities for all of our product candidates in development. Regulatory authorities enforce these regulations through 
periodic inspections of study sponsors, principal investigators, study sites, and other contractors. If we or any of our CROs or other vendors 
and partners, including the sites at which clinical studies are conducted, fail to comply with applicable regulations, the data generated in our 
nonclinical and clinical studies may be deemed unreliable and the FDA, EMA, or comparable foreign regulatory authorities may deny 
approval and/or require us to perform additional nonclinical and clinical studies before approving our marketing applications, which would 
delay the approval process. We cannot make assurances that upon inspection by a given regulatory authority, such regulatory authority will 
determine that any of our clinical studies comply with GCP regulations or that nonclinical studies comply with GLP regulations. In addition, 
our clinical studies must be conducted with products produced under GMP regulations. If the regulatory authorities determine that we have 
failed to comply with GLP, GMP, or GCP regulations, they may deny approval of our product candidates and/or we may be required to repeat 
clinical or nonclinical studies, which would delay the regulatory approval process. 
Our CROs and other vendors and partners are not our employees and we cannot control whether or not they devote sufficient time 
and resources to our on-going nonclinical and clinical programs, except for the limited remedies available to us under our agreements with 
such third parties. If our vendors and partners do not successfully carry out their contractual duties or obligations or meet expected 
deadlines, if they need to be replaced, or if the quality or accuracy of the data they obtain is compromised due to the failure to adhere to our 
protocols, regulatory requirements, or for other reasons, our clinical studies may be extended, delayed, or terminated, and we may not be 
able to obtain regulatory approval for or successfully commercialize our product candidates. CROs and other vendors and partners may also 
generate higher costs than anticipated as a result of changes in scope of work or otherwise. As a result, the commercial prospects for our 
product candidates would be harmed, our costs could increase, and our ability to generate revenue could be delayed. 
If any of our relationships with these third parties terminate, we may not be able to enter into arrangements with alternative vendors or 
do so on commercially reasonable terms. Switching or adding additional vendors involves additional cost and requires management time and 
focus. In addition, there is a natural transition period when a new vendor commences work. As a result, delays may occur, which can 
materially impact our ability to meet our desired clinical development timelines. Our efforts to manage our relationships with our vendors and 
partners can provide no assurance that we will not encounter similar challenges or delays in the future or that these delays or challenges will 
not have a material adverse impact on our business, financial condition, and business prospects. 
We also rely on third parties in other ways, including efforts to support patient diagnosis and identify patients, to assist our finance and 
legal departments, and to provide other resources for our business. Use of these third parties could expose us to sub-optimal quality, missed 
deadlines, and non-compliance with applicable laws, all of which could result in reputational harm to us and negatively affect our business.
45
 
We are dependent on KKC for the clinical and commercial supply of Crysvita for all major markets and for the development and 
commercialization of Crysvita in certain major markets, and KKC’s failure to provide an adequate supply of Crysvita or to 
commercialize Crysvita in those markets could result in a material adverse effect on our business and operating results. 
Under our agreement with KKC, KKC has the sole right to commercialize Crysvita in Europe and, at certain specified times, in the 
U.S., Canada, and Turkey, subject to certain rights retained by us. Our partnership with KKC may not be successful, and we may not realize 
the expected benefits from such partnership, due to a number of important factors, including but not limited to the following: 
•
•
•
•
•
•
•
•
•
•
KKC has no obligation under our agreement to use diligent efforts to commercialize Crysvita in Europe. The timing and amount of 
any royalty payments that are made by KKC based on sales of Crysvita in Europe will depend on, among other things, the efforts, 
allocation of resources, and successful commercialization of Crysvita by KKC in Europe;
the timing and amount of any payments we may receive under our agreement with KKC will depend on, among other things, the 
efforts, allocation of resources, and successful commercialization of Crysvita by KKC in the U.S. and Canada under our 
agreement; 
KKC may change the focus of its commercialization efforts or pursue higher-priority programs; 
KKC may make decisions regarding the indications for our product candidates in countries where it has the sole right to 
commercialize the product candidates that limit commercialization efforts in those countries or in countries where we have the 
right to commercialize our product candidates; 
KKC may make decisions regarding market access and pricing in countries where it has the sole right to commercialize our 
product candidates which can negatively impact our commercialization efforts in countries where we have the right to 
commercialize our product candidates;
KKC may fail to manufacture or supply sufficient drug product of Crysvita in compliance with applicable laws and regulations or 
otherwise for our development and clinical use or commercial use (including as a result of the COVID-19 pandemic), which could 
result in program delays or lost revenue;
KKC may elect to develop and commercialize Crysvita indications with a larger market than XLH and at a lower price, thereby 
reducing the profit margin on sales of Crysvita for any orphan indications, including XLH; 
if KKC were to breach or terminate the agreement with us, we would no longer have any rights to develop or commercialize 
Crysvita or such rights would be limited to non-terminated countries; 
KKC may terminate its agreement with us, adversely affecting our potential revenue from licensed products; and 
the timing and amounts of expense reimbursement that we may receive are uncertain, and the total expenses for which we are 
obligated to reimburse KKC may be greater than anticipated. 
We rely on third parties to manufacture our products and our product candidates and we are subject to a multitude of 
manufacturing risks, any of which could substantially increase our costs and limit the supply of our product and product 
candidates. 
As we currently lack the resources and the capability to manufacture our products and most of our product candidates on a clinical or 
commercial scale, we rely on third parties to manufacture our products and product candidates. Although we oversee the contract 
manufacturers, we cannot control the manufacturing process of, and are substantially dependent on, our contract manufacturing partners for 
compliance with the regulatory requirements. See “- Even if we obtain regulatory approval for our product candidates, our products remain 
subject to regulatory scrutiny” risk factor above. Further, we depend on our manufacturers to purchase from third-party suppliers the 
materials necessary to produce our products and product candidates. There are a limited number of suppliers for raw materials that we use 
to manufacture our drugs, placebos, or active controls, and there may be a need to identify alternate suppliers to prevent or mitigate a 
possible disruption of the manufacture of the materials necessary to produce our products and product candidates for our clinical studies, 
and, if approved, ultimately for commercial sale. We also do not have any control over the process or timing of the acquisition of these raw 
materials by our manufacturers. We may also experience interruptions in supply of product if the product or raw material components fail to 
meet our quality control standards or the quality control standards of our suppliers. 
Further, manufacturers that produce our products and product candidates may not have experience producing our products and 
product candidates at commercial levels and may not produce our products and product candidates at the cost, quality, quantities, locations, 
and timing needed to support profitable commercialization. We have not yet secured manufacturing capabilities for commercial quantities of 
all of our product candidates and may be unable to negotiate binding agreements with manufacturers to support our commercialization 
activities on commercially reasonable terms. Even if our third-party product 
46
 
manufacturers develop acceptable manufacturing processes that provide the necessary quantities of our products and product candidates in 
a compliant and timely manner, the cost to us for the supply of our products and product candidates manufactured by such third parties may 
be high and could limit our profitability. For instance, KKC is our sole supplier of commercial quantities of Crysvita. The supply price to us for 
commercial sales of Crysvita in Latin America and the transfer price for commercial sales of the product in the U.S. and Canada was 35% of 
net sales through December 31, 2022 and is 30% thereafter, which is higher than the typical cost of sales for companies focused on rare 
diseases.
The process of manufacturing our products and product candidates is complex, highly regulated, and subject to several risks, including 
but not limited to those listed below. 
•
•
The process of manufacturing our products and product candidates is extremely susceptible to product loss due to contamination, 
equipment failure or improper installation or operation of equipment, or vendor or operator error. Even minor deviations from 
normal manufacturing processes for our products and any of our product candidates could result in reduced production yields, 
product defects, and other supply disruptions. If microbial, viral, or other contaminations are discovered in our products and 
product candidates or in the manufacturing facilities in which our products and product candidates are made, such manufacturing 
facilities may need to be closed for an extended period of time to investigate and remedy the contamination.
The manufacturing facilities in which our products and product candidates are made could be adversely affected by equipment 
failures, labor shortages, raw material shortages, natural disasters, power failures, actual or threatened public health 
emergencies, and numerous other factors. 
Any adverse developments affecting manufacturing operations for our products and product candidates may result in shipment delays, 
inventory shortages, lot failures, withdrawals or recalls, or other interruptions in the supply of our products and product candidates. Due to 
their stage of development, small volume requirements, and infrequency of batch production runs, we carry limited amounts of safety stock 
for our products and product candidates. We have, and may in the future, be required to take inventory write-offs and incur other charges and 
expenses for products and product candidates that fail to meet specifications, undertake costly remediation efforts, or seek more costly 
manufacturing alternatives.
The drug substance and drug product for our products and most of our product candidates are currently acquired from single-
source suppliers. The loss of these suppliers, or their failure to supply us with the necessary drug substance or drug product, 
could materially and adversely affect our business. 
We acquire most of the drug substances and drug products for our products and product candidates from single sources. If any single 
source supplier breaches an agreement with us, or terminates the agreement in response to an alleged breach by us or otherwise becomes 
unable or unwilling to fulfill its supply obligations, we would not be able to manufacture and distribute the product or product candidate until a 
qualified alternative supplier is identified, which could significantly impair our ability to commercialize such product or delay the development 
of such product candidate. For example, the drug substance and drug product for Crysvita and Evkeeza are made, respectively, by KKC 
pursuant to a license and collaboration agreement and Regeneron pursuant to a supply agreement. The drug substance and drug product for 
Mepsevii are currently manufactured by Rentschler under a commercial supply and services agreement, accompanying purchase orders, 
and other agreements. Pharmaceutical-grade drug substance for Dojolvi is manufactured by IOI Oleo pursuant to a supply agreement, and 
the drug product for Dojolvi is prepared by Haupt Pharma AG, pursuant to a master services agreement. Single source suppliers are also 
used for our gene therapy programs. We cannot provide assurances that identifying alternate sources, if available at all, and establishing 
relationships with such sources would not result in significant expense or delay in the commercialization of our products or the development 
of our product candidates. Additionally, we may not be able to enter into supply arrangements with an alternative supplier on commercially 
reasonable terms or at all. The terms of any new agreement may also be less favorable or more costly than the terms we have with our 
current supplier. A delay in the commercialization of our products or the development of our product candidates or having to enter into a new 
agreement with a different third-party on less favorable terms than we have with our current suppliers could have a material adverse impact 
upon on our business.
The actions of distributors and specialty pharmacies could affect our ability to sell or market products profitably. Fluctuations in 
buying or distribution patterns by such distributors and specialty pharmacies could adversely affect our revenues, financial 
condition, or results of operations. 
We rely on commercial distributors and specialty pharmacies for a considerable portion of our product sales and such sales are 
concentrated within a small number of distributors and specialty pharmacies. The financial failure of any of these parties could adversely 
affect our revenues, financial condition or results of operations. Our revenues, financial condition or results of operations may also be 
affected by fluctuations in buying or distribution patterns of such distributors and specialty pharmacies. These fluctuations may result from 
seasonality, pricing, wholesaler inventory objectives, or other factors. 
47
 
Risks Related to Commercialization of Our Products and Product Candidates 
If the market opportunities for our products and product candidates are smaller than we believe they are, our revenue may be 
adversely affected, and our business may suffer. Because the target patient populations of our products and product candidates 
are small, and the addressable patient population potentially even smaller, we must be able to successfully identify patients and 
acquire a significant market share to achieve profitability and growth. 
We focus our research and product development on treatments for rare and ultra-rare genetic diseases. Given the small number of 
patients who have the diseases that we are targeting, it is critical to our ability to grow and become profitable that we continue to successfully 
identify patients with these rare and ultra-rare genetic diseases. The COVID-19 pandemic has impacted and may continue to impact our 
ability to identify new patients and to maintain consistent contact with our current patients. For instance, illness from the more contagious 
variants impacted the availability of certain of our field and sales medical teams and resulted in staffing shortages at offices, clinics, and 
hospitals. Some of our current products or clinical programs may also be most appropriate for patients with more severe forms of their 
disease. For instance, while adults make up the majority of the XLH patients, they often have less severe disease that may reduce the 
penetration of Crysvita in the adult population relative to the pediatric population. Given the overall rarity of the diseases we target, it is 
difficult to project the prevalence of the more severe forms, or the other subsets of patients that may be most suitable to address with our 
products and product candidates, which may further limit the addressable patient population to a small subset. Our projections of both the 
number of people who have these diseases, as well as the subset of people with these diseases who have the potential to benefit from 
treatment with our products and product candidates, are based on our beliefs and estimates. These estimates have been derived from a 
variety of sources, including the scientific literature, surveys of clinics, patient foundations, or market research, and may prove to be incorrect. 
Further, new studies may change the estimated incidence or prevalence of these diseases. The number of patients may turn out to be lower 
than expected. The effort to identify patients with diseases we seek to treat is in early stages, and we cannot accurately predict the number of 
patients for whom treatment might be possible. Additionally, the potentially addressable patient population for each of our products and 
product candidates may be limited or may not be amenable to treatment with our products and product candidates, and new patients may 
become increasingly difficult to identify or access. Further, even if we obtain significant market share for our products and product 
candidates, because the potential target populations are very small, we may never become or remain profitable nor generate sufficient 
revenue growth to sustain our business.
We face intense competition and rapid technological change and the possibility that our competitors may develop therapies that 
are similar, more advanced, or more effective than ours, which may adversely affect our financial condition and our ability to 
successfully commercialize our product candidates. 
The biotechnology and pharmaceutical industries are intensely competitive and subject to rapid and significant technological change. 
We are currently aware of various existing treatments that may compete with our products and product candidates. See “Item 1. Business – 
Competition” above. 
We have competitors both in the U.S. and internationally, including major multinational pharmaceutical companies, specialty 
pharmaceutical companies, biotechnology companies, startups, academic research institutions, government agencies, and public and private 
research institutions. Many of our competitors have substantially greater financial, technical, and other resources, such as larger research 
and development staff and experienced marketing and manufacturing organizations. Additional mergers and acquisitions in the 
biotechnology and pharmaceutical industries may result in even more resources being concentrated in our competitors. As a result, these 
companies may obtain regulatory approval more rapidly than we are able to and may be more effective in selling and marketing their 
products as well. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative 
arrangements with large, established companies. Competition may increase further as a result of advances in the commercial applicability of 
technologies and greater availability of capital for investment in these industries. Our competitors may succeed in developing, acquiring, or 
licensing on an exclusive basis, products that are more effective or less costly than any product candidate that we may develop, or achieve 
earlier patent protection, regulatory approval, product commercialization, and market penetration than we do. Additionally, technologies 
developed by our competitors may render our potential products and product candidates uneconomical or obsolete, and we may not be 
successful in marketing our products and product candidates against competitors. 
We may not be able to effectively manage the expansion of our organization, including building an integrated commercial 
organization. If we are unable to expand our existing commercial infrastructure or enter into agreements with third parties to 
market and sell our products and product candidates, as needed, we may be unable to increase our revenue. 
We expect to need additional managerial, operational, marketing, financial, legal, and other resources to support our development and 
commercialization plans and strategies. In order to successfully commercialize our products as well as any additional products that may 
result from our development programs or that we acquire or license from third parties, we are building 
48
 
and expanding our commercial infrastructure in North America, Europe, Latin America and the Asia-Pacific region. This infrastructure 
consists of both office-based as well as field teams with technical expertise, and will be expanded as we approach the potential approval 
dates of additional products that result from our development programs. Our management may need to divert a disproportionate amount of 
its attention away from our day-to-day activities and devote a substantial amount of time to managing these growth activities. We may not be 
able to effectively manage the expansion of our operations, which may result in weaknesses in our infrastructure, operational mistakes, loss 
of business opportunities, loss of employees, and reduced productivity among remaining employees. Our expected growth could require 
significant capital expenditures and may divert financial resources from other projects, such as the development of additional product 
candidates. If our management is unable to effectively manage our growth, our expenses may increase more than expected, our ability to 
generate and/or grow revenue could be reduced, and we may not be able to implement our business strategy. Our future financial 
performance and our ability to commercialize product candidates and compete effectively will depend, in part, on our ability to effectively 
manage any future growth. 
We, as a company, have limited, recent experience selling and marketing our product and only some of our employees have prior 
experience promoting other similar products while employed at other companies. As we increase the number and range of our 
commercialized products, we may experience additional complexities in our sales process and strategy and may encounter difficulties in 
allocating sufficient resources to sales and marketing of certain products. Further, as we launch additional products or as demand for our 
products change, our initial estimate of the size of the required field force may be materially more or less than the size of the field force 
actually required to effectively commercialize our product candidates. As such, we may be required to hire larger teams to adequately 
support the commercialization of our products and product candidates or we may incur excess costs in an effort to optimize the hiring of 
commercial personnel. With respect to certain geographical markets, we may enter into collaborations with other entities to utilize their local 
marketing and distribution capabilities, but we may be unable to enter into such agreements on favorable terms, if at all. If our future 
collaborators do not commit sufficient resources to commercialize our future products, if any, and we are unable to develop the necessary 
marketing capabilities on our own, we will be unable to generate sufficient product revenue to sustain our business. We may be competing 
with companies that currently have extensive and well-funded marketing and sales operations. Without a large internal team or the support of 
a third-party to perform key commercial functions, we may be unable to compete successfully against these more established companies.
Our exclusive rights to promote Crysvita in the U.S. and Canada will transition back to KKC. 
Pursuant to the terms of our collaboration and license agreement with KKC, or the collaboration agreement, we have the sole right to 
promote Crysvita in the U.S. and Canada, or the profit-share territory, for a specified period of time, with KKC increasingly participating in the 
promotion of the product until the transition date of April 2023. At the transition date, commercialization responsibilities for Crysvita in the 
profit-share territory will transition to KKC, and KKC will be responsible for the commercialization of the product in the territory. In September 
2022, we entered into an amendment to the collaboration agreement which clarified the scope of increased participation by KKC in support of 
our commercial activities prior to April 2023 and granted us the right to continue to support KKC in commercial field activities in the U.S. 
through April 2024, subject to the limitations and conditions set forth in the amendment. As a result, KKC will continue to support our 
commercial field and marketing efforts through a cost share arrangement through April 2024, subject to the limits and conditions set forth in 
the amendment. After April 2024, our rights to promote Crysvita in the U.S. will be limited to medical geneticists and we will be solely 
responsible for our costs related to the promotion of Crysvita in the profit-share territory. The transition of responsibilities to KKC requires 
significant effort and may result in the diversion of management’s attention to transition activities. We may also encounter unexpected 
difficulties or incur unexpected costs in connection with such transition activities. Further, we cannot assure that we will have adequate 
commercial activity to support our North America field force and other aspects of our commercial infrastructure in the territory after April 2024 
and we may fail to retain members of our field teams due to such uncertainties. Collaboration with KKC may not result in a seamless 
49
 
transition of responsibilities, and the commercial success of Crysvita in the profit-share territory after the transition date will depend on, 
among other things, the efforts and allocation of resources of KKC.
The commercial success of any current or future product will depend upon the degree of market acceptance by physicians, 
patients, third-party payors, and others in the medical community. 
Even with the requisite approvals from the FDA and comparable foreign regulatory authorities, the commercial success of our current 
and future products will depend in part on the medical community, patients, and payors accepting our current and future products as 
medically useful, cost-effective, and safe. Any product that we bring to the market may not gain market acceptance by physicians, patients, 
payors, and others in the medical community. The degree of market acceptance of any of our current and future products will depend on a 
number of factors, including: 
•
•
•
•
•
•
•
•
•
•
the efficacy of the product as demonstrated in clinical studies and potential advantages over competing treatments; 
the prevalence and severity of any side effects, including any limitations or warnings contained in a product’s approved labeling; 
the clinical indications for which approval is granted; 
relative convenience and ease of administration; 
the cost of treatment, particularly in relation to competing treatments; 
the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies; 
the effectiveness of our field forces and marketing efforts;
the strength of marketing and distribution support and timing of market introduction of competitive products; 
publicity concerning our products or competing products and treatments; and 
sufficient third-party insurance coverage and reimbursement. 
Even if a potential product displays a favorable efficacy and safety profile in nonclinical and clinical studies, market acceptance of the 
product will not be fully known until after it is launched. Our efforts to educate the medical community and payors on the benefits of the 
product candidates require significant resources and may never be successful. If our current and future products fail to achieve an adequate 
level of acceptance by physicians, patients, payors, and others in the medical community, we will not be able to generate sufficient revenue 
to become or remain profitable. 
The insurance coverage and reimbursement status of newly approved products is uncertain. Failure to obtain or maintain adequate 
coverage and reimbursement for new or current products could limit our ability to market those products and decrease our ability 
to generate revenue. 
Our target patient populations are small, and accordingly the pricing, coverage, and reimbursement of our products and product 
candidates, if approved, must be adequate to support our commercial infrastructure. Our per-patient prices must be sufficient to recover our 
development and manufacturing costs and potentially achieve profitability. We expect the cost of a single administration of gene therapy 
products, such as those we are developing, to be substantial, when and if they achieve regulatory approval. Accordingly, the availability and 
adequacy of coverage and reimbursement by governmental and private payors are essential for most patients to afford expensive treatments 
such as ours, assuming approval. Sales of our products and product candidates, if approved, will depend substantially, both domestically and 
abroad, on the extent to which their costs will be paid for by health maintenance, managed care, pharmacy benefit, and similar healthcare 
management organizations, or reimbursed by government authorities, private health insurers, and other payors. If coverage and 
reimbursement are not available, are available only to limited levels, or are not available on a timely basis, we may not be able to 
successfully commercialize our products and product candidates, if approved. For example, deteriorating economic conditions and political 
instability in certain Latin American countries and in Turkey continue to cause us to experience significant delays in receiving approval for 
reimbursement for our products and consequently impact our product commercialization timelines in such regions. Even if coverage is 
provided, the approved reimbursement amount may not be high enough to allow us to establish or maintain pricing sufficient to sustain our 
overall enterprise. In addition, we do not know the reimbursement rates until we are ready to market the product and we actually negotiate 
the rates.
50
 
There is significant uncertainty related to the insurance coverage and reimbursement of newly approved products. In the U.S., the 
Centers for Medicare & Medicaid Services, or CMS, an agency within the U.S. Department of Health and Human Services, decides whether 
and to what extent a new drug will be covered and reimbursed under Medicare. Private payors tend to follow the coverage reimbursement 
policies established by CMS to a substantial degree. It is difficult to predict what CMS or private payors will decide with respect to 
reimbursement for products such as ours, especially our gene therapy product candidates as there is a limited body of established practices 
and precedents for gene therapy products. 
Outside the U.S., international operations are generally subject to extensive governmental price controls and other market regulations, 
and we believe the increasing emphasis on cost-containment initiatives in Europe, Canada, and other countries will put pressure on the 
pricing and usage of our products and product candidates. In many countries, the prices of medical products are subject to varying price 
control mechanisms as part of national health systems. Other countries allow companies to fix their own prices for medicinal products, but 
monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that we 
are able to charge for our product candidates. Accordingly, in markets outside the U.S., the reimbursement for our products may be reduced 
compared with the U.S. and may be insufficient to generate commercially reasonable revenue and profits. The timing to complete the 
negotiation process in each country is highly uncertain, and in some countries outside of the United States, we expect the process to exceed 
several months. Even if a price can be negotiated, countries frequently request or require reductions to the price and other concessions over 
time, including retrospective “clawback” price reductions. Additionally, member states of the EU have regularly imposed new or additional 
cost containment measures for pharmaceuticals such as volume discounts, cost caps, clawbacks and free products for a portion of the 
expected therapy period. For example, in France, we estimate clawback reserves on Dojolvi based on current regulations, our estimate of 
pricing on approval of Dojolvi and other factors. However, if pricing is approved at levels lower than estimated, if at all, or if there are further 
changes in the regulatory framework, we may be required to pay back amounts higher than clawback reserves and reverse revenue that has 
been previously recorded.
Moreover, increasing efforts by governmental and third-party payors in the U.S. and abroad to cap or reduce healthcare costs may 
cause such organizations to limit both coverage and the level of reimbursement for new products and, as a result, they may not cover or 
provide adequate payment for our products and product candidates. We expect to experience pricing pressures in connection with the sale of 
any of our products and product candidates due to the trend toward managed healthcare, the increasing influence of health maintenance 
organizations, additional legislative changes, including the impact from the Inflation Reduction Act of 2022, and statements by elected 
officials. For example, proposals have been discussed to tie U.S. drug prices to the cost in other countries, several states in the U.S. have 
introduced legislation to require pharmaceutical companies to disclose their costs to justify the prices of their products. Drug pricing is also 
expected to remain a focus for the current Presidential Administration and Congress. The downward pressure on healthcare costs in general, 
and with respect to prescription drugs, surgical procedures, and other treatments in particular, has become very intense. As a result, 
increasingly high barriers are being erected to the entry of new products.
Risks Related to Our Intellectual Property 
If we are unable to obtain and maintain effective patent rights for our products, product candidates, or any future product 
candidates, we may not be able to compete effectively in our markets. 
We rely upon a combination of patents, trade secret protection, and confidentiality agreements to protect the intellectual property 
related to our technologies, our products, and our product candidates. Our success depends in large part on our and our licensors’ ability to 
obtain and maintain patent and other intellectual property protection in the U.S. and in other countries with respect to our proprietary 
technologies, our products, and our product candidates. 
We have sought to protect our proprietary position by filing patent applications in the U.S. and abroad related to our novel 
technologies, products and product candidates that are important to our business. This process is expensive and time consuming, and we 
may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also 
possible that we will fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection. 
51
 
The patent position of biotechnology and pharmaceutical companies generally is highly uncertain and involves complex legal and 
factual questions for which legal principles remain unsolved. The patent applications that we own or in-license may fail to result in issued 
patents with claims that cover our products or product candidates in the U.S. or in other foreign countries. There is no assurance that all 
potentially relevant prior art relating to our patents and patent applications has been found, which can invalidate a patent or prevent a patent 
from issuing from a pending patent application. Third parties may challenge the validity, enforceability, or scope of any issued patents which 
may result in such patents being narrowed, found unenforceable, or invalidated. Furthermore, even if the patents and patent applications we 
own or in-license are unchallenged, they may not adequately protect our intellectual property, provide exclusivity for our products or product 
candidates, or prevent others from designing around our claims. Any of these outcomes could impair our ability to prevent competition from 
third parties. 
We, independently or together with our licensors, have filed several patent applications covering various aspects of our products or 
product candidates. We cannot offer any assurances about which, if any, patents will issue, the breadth of any such patent, or whether any 
issued patents will be found invalid and unenforceable or will be threatened by third parties. Any successful opposition to these patents could 
impair the exclusivity position of our products or deprive us of rights necessary for the successful commercialization of any product 
candidates that are approved. Further, if we encounter delays in regulatory approvals, the period of time during which we could market a 
product candidate under patent protection could be reduced. 
Our current patents or applications covering methods of use and certain compositions of matter do not provide complete patent 
protection for our products and product candidates in all territories. For example, there are no issued patents covering the Crysvita 
composition of matter in Latin America, where we have rights to commercialize this product. Therefore, a competitor could develop the same 
antibody or a similar antibody as well as other approaches that target FGF23 for potential commercialization in Latin America, subject to any 
intellectual property rights or regulatory exclusivities awarded to us. If we cannot obtain and maintain effective patent rights for our products 
or product candidates, we may not be able to compete effectively and our business and results of operations would be harmed.
We may not have sufficient patent terms to effectively protect our products and business. 
Patents have a limited lifespan. In the U.S., the natural expiration of a patent is generally 20 years after its effective filing date. 
Although various extensions may be available, the life of a patent, and the protection it affords, is limited. Even if patents covering our 
product candidates are obtained, once the patent life has expired for a product, we may be open to competition from generic or biosimilar 
medications. 
Patent term extensions under the Hatch-Waxman Act in the U.S. and under supplementary protection certificates in Europe may not 
be available to extend the patent exclusivity term for our products and product candidates, and we cannot provide any assurances that any 
such patent term extension will be obtained and, if so, for how long. Furthermore, we may not receive an extension if we fail to apply within 
applicable deadlines, fail to apply prior to expiration of relevant patents, or otherwise fail to satisfy applicable requirements. Moreover, the 
length of the extension could be less than we request. If we do not have sufficient patent terms or regulatory exclusivity to protect our 
products, our business and results of operations may be adversely affected. 
Patent policy and rule changes could increase the uncertainties and costs surrounding the prosecution of our patent applications 
and the enforcement or defense of our issued patents. 
Changes in either the patent laws or interpretation of the patent laws in the U.S. and other countries may diminish the value of our 
patents or narrow the scope of our patent protection. The laws of foreign countries may not protect our rights to the same extent as the laws 
of the U.S. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the U.S. 
and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. We therefore cannot be certain that 
we or our licensors were the first to make the invention claimed in our owned and in-licensed patents or pending applications, or that we or 
our licensor were the first to file for patent protection of such inventions. 
In 2011, the Leahy-Smith America Invents Act, or the Leahy-Smith Act, was signed into law and introduced significant changes to the 
prosecution of U.S. patent applications and to the procedures for challenging U.S. patents. The effects of these changes still remain unclear 
owing to the evolving nature of the law and the lengthy timelines associated with court system review and interpretation. However, the Leahy-
Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the 
enforcement or defense of our issued patents, all of which could have a material adverse effect on our business and financial condition. 
52
 
If we are unable to maintain effective proprietary rights for our products, product candidates, or any future product candidates, we 
may not be able to compete effectively in our markets. 
In addition to the protection afforded by patents, we rely on trade secret protection and confidentiality agreements to protect proprietary 
know-how that is not patentable or that we elect not to patent, processes for which patents are difficult to enforce and any other elements of 
our products or product candidate discovery and development processes that involve proprietary know-how, information, or technology that is 
not covered by patents. However, trade secrets can be difficult to protect. The confidentiality agreements entered into with our employees, 
consultants, scientific advisors, contractors and other third parties that we rely on in connection with the development, manufacture and 
commercialization of our products may not be sufficient to protect our proprietary technology and processes, which increase the risk that 
such trade secrets may become known by our competitors or may be inadvertently incorporated into the technology of others.
The physical security of our premises and physical and electronic security of our information technology systems may not preserve the 
integrity and confidentiality of our data and trade secrets. These individuals, organizations and systems, agreements or security measures 
may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or 
be independently discovered by competitors. 
The assignment agreements we enter into with our employees and consultants to assign their inventions to us, and the confidentiality 
agreements we enter into with our employees, consultants, advisors, and any third parties who have access to our proprietary know-how, 
information, or technology may not have been duly executed and we cannot assure that our trade secrets and other confidential proprietary 
information will not be disclosed or that competitors will not otherwise gain access to our trade secrets or independently develop substantially 
equivalent information and techniques. Misappropriation or unauthorized disclosure of our trade secrets could impair our competitive position 
and may have a material adverse effect on our business. Additionally, if the steps taken to maintain our trade secrets are deemed 
inadequate, we may have insufficient recourse against third parties for misappropriating the trade secret. 
Claims of intellectual property infringement may prevent or delay our development and commercialization efforts.
Our commercial success depends in part on our avoiding infringement of the patents and proprietary rights of others. There have been 
many lawsuits and other proceedings involving patent and other intellectual property rights in the biotechnology and pharmaceutical 
industries, including patent infringement lawsuits, interferences, inter partes reviews, post grant reviews, oppositions, and reexamination 
proceedings before the USPTO and corresponding foreign patent offices. Numerous U.S. and foreign issued patents and pending patent 
applications, which are owned by other parties, exist in the fields in which we are developing product candidates. As the biotechnology and 
pharmaceutical industries expand and more patents are issued, the risk increases that our products or product candidates may be subject to 
claims of infringement of the patent rights of these other parties. 
Other parties may assert that we are employing their proprietary technology without authorization. There may be patents or patent 
applications with claims to materials, formulations, methods of manufacture, or methods for treatment relevant to the use or manufacture of 
our products or product candidates. We have conducted freedom to operate analyses with respect only to our products and certain of our 
product candidates, and therefore we do not know whether there are any patents of other parties that would impair our ability to 
commercialize all of our product candidates. We also cannot guarantee that any of our analyses are complete and thorough, nor can we be 
sure that we have identified each and every patent and pending application in the U.S. and abroad that is relevant or necessary to the 
commercialization of our products or product candidates. Because patent applications can take many years to issue, there may be currently 
pending patent applications that may later result in issued patents that are relevant to our products or product candidates. 
We are aware of certain U.S. and foreign patents owned by third parties that a court might construe to be valid and relevant to one or 
more of our gene therapy product candidates, certain methods that may be used in their manufacture or delivery, or certain formulations 
comprising one or more of our gene therapy candidates. We are also aware of certain U.S. and foreign patents owned by third parties that 
relate to nucleic acid-containing lipid particles or to certain mRNA modifications, and which a court might construe to be valid and relevant to 
UX053. There is a risk that one or more of these third parties may choose to engage in litigation with us to enforce or to otherwise assert their 
patent rights against us. Even if we believe such claims are without merit, a court of competent jurisdiction could hold that one or more of 
these patents is valid, enforceable, and infringed, in which case the owners of any such patents may be able to block our ability to 
commercialize a product candidate unless we obtained a license under the applicable patents, or until such patents expire. However, such a 
license may not be available on commercially reasonable terms or at all. 
53
 
Parties making claims against us may obtain injunctive or other equitable relief, which could effectively block our ability to continue 
commercialization of our products, or block our ability to develop and commercialize one or more of our product candidates. Defense of these 
claims, regardless of their merit, would involve substantial litigation expense and would be a substantial diversion of employee resources 
from our business. In the event of a successful claim of infringement against us, we may have to pay substantial damages, including treble 
damages and attorneys’ fees for willful infringement, pay royalties, redesign our infringing products, or obtain one or more licenses from third 
parties, which may be impossible or require substantial time and monetary expenditure.
We may not be successful in obtaining or maintaining necessary rights to our product candidates through acquisitions and in-
licenses. 
Because our programs may require the use of proprietary rights held by third parties, the growth of our business will likely depend in 
part on our ability to acquire, in-license, or use these proprietary rights. For example, our product candidates may require specific 
formulations to work effectively and efficiently and the rights to these formulations may be held by others. We may be unable to acquire or in-
license any compositions, methods of use, processes, or other third-party intellectual property rights from third parties that we identify as 
necessary for our product candidates. The licensing and acquisition of third-party intellectual property rights is a competitive area, and a 
number of more established companies are also pursuing strategies to license or acquire third-party intellectual property rights that we may 
consider attractive. These established companies may have a competitive advantage over us due to their size, cash resources, and greater 
clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to 
assign or license rights to us. We also may be unable to license or acquire third-party intellectual property rights on terms that would allow us 
to make an appropriate return on our investment. 
We sometimes collaborate with U.S. and foreign academic institutions to accelerate our preclinical research or development under 
written agreements with these institutions. Typically, these institutions provide us an option to negotiate a license to any of the institution’s 
rights in technology resulting from the collaboration. Regardless of such option, we may be unable to negotiate a license within the specified 
timeframe or under terms that are acceptable to us. If we are unable to do so, the institution may offer the intellectual property rights to other 
parties, potentially blocking our ability to pursue our program. 
If we are unable to successfully obtain rights to required third-party intellectual property rights or maintain the existing intellectual 
property rights we have, we may have to abandon development of the corresponding program. 
We may face competition from biosimilars, which may have a material adverse impact on the future commercial prospects of our 
biological products and product candidates.
Even if we are successful in achieving regulatory approval to commercialize a product candidate faster than our competitors, we may 
face competition from biosimilars with respect to our biological products (Crysvita, Mepsevii and Evkeeza) and our biological product 
candidates. In the U.S., the Biologics Price Competition and Innovation Act of 2009, or BPCI Act, was included in the Affordable Care Act 
and created an abbreviated approval pathway for biological products that are demonstrated to be “highly similar,” or biosimilar, to or 
“interchangeable” with an FDA-approved biological product. The BPCI Act prohibits the FDA from approving a biosimilar or interchangeable 
product that references a brand biological product until 12 years after the licensure of the reference product, but permits submission of an 
application for a biosimilar or interchangeable product to the FDA four years after the reference product was first licensed. The BPCI Act 
does not prevent another company from developing a product that is highly similar to the innovative product, generating its own data, and 
seeking approval. The law is complex and is still being interpreted and implemented by the FDA. As a result, its ultimate impact, 
implementation and meaning are subject to uncertainty. Modification of the BPCI Act, or changes to the FDA’s interpretation or 
implementation of the BPCI Act, could have a material adverse effect on the future commercial prospects for our biological products and 
product candidates. 
In Europe, the European Commission has granted marketing authorizations for several biosimilars pursuant to a set of general and 
product class-specific guidelines for biosimilar approvals issued over the past few years. In Europe, a competitor may reference data 
supporting approval of an innovative biological product, but will not be able to get on the market until 10 years after the time of approval of 
the innovative product. This 10-year marketing exclusivity period will be extended to 11 years if, during the first eight of those 10 years, the 
marketing authorization holder obtains an approval for one or more new therapeutic indications that bring significant clinical benefits 
compared with existing therapies. In addition, companies may be developing biosimilars in other countries that could compete with our 
products. 
If competitors are able to obtain marketing approval for biosimilars referencing our products, our products may become subject to 
competition from such biosimilars, with the attendant competitive pressure and consequences. 
54
 
Competitors could enter the market with generic versions of Dojolvi or our small-molecule product candidates, which may result in 
a material decline in sales of affected products. 
Under the Hatch-Waxman Act, a pharmaceutical manufacturer may file an abbreviated new drug application, or ANDA, seeking 
approval of a generic copy of an approved innovator product. Under the Hatch-Waxman Act, a manufacturer may also submit an NDA under 
section 505(b)(2) that references the FDA’s finding of safety and effectiveness of a previously approved drug. A 505(b)(2) NDA product may 
be for a new or improved version of the original innovator product. Innovative small molecule drugs may be eligible for certain periods of 
regulatory exclusivity (e.g., five years for new chemical entities, three years for changes to an approved drug requiring a new clinical study, 
and seven years for orphan drugs), which preclude FDA approval (or in some circumstances, FDA filing and review of) an ANDA or 505(b)(2) 
NDA relying on the FDA’s finding of safety and effectiveness for the innovative drug. In addition to the benefits of regulatory exclusivity, an 
innovator NDA holder may have patents claiming the active ingredient, product formulation or an approved use of the drug, which would be 
listed with the product in the “Orange Book.” If there are patents listed in the Orange Book, a generic applicant that seeks to market its 
product before expiration of the patents must include in the ANDA or 505(b)(2) what is known as a “Paragraph IV certification,” challenging 
the validity or enforceability of, or claiming non-infringement of, the listed patent or patents. Notice of the certification must be given to the 
innovator, too, and if within 45 days of receiving notice the innovator sues to enforce its patents, approval of the ANDA is stayed for 30 
months, or as lengthened or shortened by the court. 
Accordingly, competitors could file ANDAs for generic versions of our small-molecule product, Dojolvi, or 505(b)(2) NDAs that 
reference Dojolvi. For the patents listed for Dojolvi in the Orange Book, those ANDAs and 505(b)(2) NDAs would be required to include a 
certification as to each listed patent indicating whether the ANDA applicant does or does not intend to challenge the patent. We cannot 
predict how any generic competitor would address such patents, whether we would sue on any such patents, or the outcome of any such 
suit. 
We may not be successful in securing or maintaining proprietary patent protection for products and technologies we develop or 
license. Moreover, if any patents that are granted and listed in the Orange Book are successfully challenged by way of a Paragraph IV 
certification and subsequent litigation, the affected product could more immediately face generic competition and its sales would likely decline 
materially. Should sales decline, we may have to write off a portion or all of the intangible assets associated with the affected product and our 
results of operations and cash flows could be materially and adversely affected. 
The patent protection and patent prosecution for some of our products and product candidates is dependent on third parties. 
While we normally seek and gain the right to fully prosecute the patents relating to our products or product candidates, there may be 
times when patents relating to our products or product candidates are controlled by our licensors. This is the case with our license 
agreements with KKC and Regeneron, who are primarily responsible for the prosecution of certain patents and patent applications covering 
Crysvita and Evkeeza, respectively. 
In addition, we have in-licensed various patents and patent applications owned by the University of Pennsylvania relating to our 
DTX301,DTX401 and/or UX701 product candidates. Some of these patents and patent applications are licensed or sublicensed by REGENX 
and sublicensed to us. We do not have the right to control the prosecution of these patent applications, or the maintenance of any of these 
patents. In addition, under our agreement with REGENX, we do not have the first right to enforce the licensed patents, and our enforcement 
rights are subject to certain limitations that may adversely impact our ability to use the licensed patents to exclude others from 
commercializing competitive products. Moreover, REGENX and the University of Pennsylvania may have interests which differ from ours in 
determining whether to enforce and the manner in which to enforce such patents.
We also have in-licensed patents and patent applications owned by Arcturus relating to the cationic lipid used in UX053. We do not 
have the right to control the prosecution of these patent applications, or the maintenance of any of these patents. In addition, under our 
agreement with Arcturus, we do not have the first right to enforce these patents, and our enforcement rights are subject to certain limitations 
that may adversely impact our ability to use these licensed patents to exclude others from commercializing competitive products. Moreover, 
Arcturus may have interests which differ from ours in determining whether to enforce and the manner in which to enforce such patents.
If KKC, Regeneron, the University of Pennsylvania, REGENX, Arcturus or any of our future licensing partners fail to appropriately 
prosecute, maintain, and enforce patent protection for the patents covering any of our products or product candidates, our ability to develop 
and commercialize those products or product candidates may be adversely affected and we may not be able to prevent competitors from 
making, using, and selling competing products. In addition, even where we now have the right to control patent prosecution of patents and 
patent applications we have licensed from third parties, we may still be adversely affected or prejudiced by actions or inactions of our 
licensors and their counsel that took place prior to us assuming control over patent prosecution. 
55
 
If we fail to comply with our obligations in the agreements under which we license intellectual property and other rights from third 
parties or otherwise experience disruptions to our business relationships with our licensors, we could lose license rights that are 
important to our business. 
We are a party to a number of intellectual property license agreements that are important to our business and expect to enter into 
additional license agreements in the future. Our existing license agreements impose, and we expect that future license agreements will 
impose, various diligence, milestone payment, royalty, and other obligations on us. If we fail to comply with our obligations under these 
agreements, or we are subject to a bankruptcy, we may be required to make certain payments to the licensor, we may lose the exclusivity of 
our license, or the licensor may have the right to terminate the license, in which event we would not be able to develop or market products 
covered by the license. Additionally, the milestone and other payments associated with these licenses will make it less profitable for us to 
develop our product candidates. 
In certain cases, we control the prosecution of patents resulting from licensed technology. In the event we breach any of our 
obligations related to such prosecution, we may incur significant liability to our licensing partners. Licensing of intellectual property is of 
critical importance to our business and involves complex legal, business, and scientific issues. Disputes may arise regarding intellectual 
property subject to a licensing agreement, including but not limited to: 
•
•
•
•
•
•
the scope of rights granted under the license agreement and other interpretation-related issues; 
the extent to which our technology and processes infringe on intellectual property of the licensor that is not subject to the licensing 
agreement; 
the sublicensing of patent and other rights; 
our diligence obligations under the license agreement and what activities satisfy those diligence obligations; 
the ownership of inventions and know-how resulting from the joint creation or use of intellectual property by our licensors and us 
and our collaborators; and 
the priority of invention of patented technology. 
If disputes over intellectual property and other rights that we have licensed prevent or impair our ability to maintain our current 
licensing arrangements on acceptable terms, we may be unable to successfully develop and commercialize the affected product candidates. 
We may become involved in lawsuits to protect or enforce our patents or the patents of our licensors, or be subject to claims that 
challenge the inventorship or ownership of our patents or other intellectual property, which could be expensive, time consuming, 
and result in unfavorable outcomes. 
Competitors may infringe our patents or the patents of our licensors. If we or one of our licensing partners were to initiate legal 
proceedings against a third party to enforce a patent covering our products or one of our product candidates, the defendant could 
counterclaim that the patent covering our product or product candidate is invalid and/or unenforceable. In patent litigation in the U.S., 
defendant counterclaims alleging invalidity and/or unenforceability are commonplace. Grounds for a validity challenge could be an alleged 
failure to meet any of several statutory requirements, including lack of novelty, obviousness, or non-enablement. Grounds for an 
unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld relevant information from 
the USPTO, or made a misleading statement, during prosecution. The outcome following legal assertions of invalidity and unenforceability is 
unpredictable. 
Interference proceedings or derivation proceedings now available under the Leahy-Smith Act provoked by third parties or brought by 
us or declared or instituted by the USPTO may be necessary to determine the priority of inventions with respect to our patents or patent 
applications or those of our licensors. An unfavorable outcome could require us to cease using the related technology or to attempt to license 
rights to it from the prevailing party. Our business could be harmed if the prevailing party does not offer us a license on commercially 
reasonable terms. In addition, the validity of our patents could be challenged in the USPTO by one of the new post grant proceedings (i.e., 
inter partes review or post grant review) now available under the Leahy-Smith Act. Our defense of litigation, interference proceedings, or post 
grant proceedings under the Leahy-Smith Act may fail and, even if successful, may result in substantial costs and distract our management 
and other employees. 
We may in the future also be subject to claims that former employees, collaborators, or other third parties have an interest in our 
patents as an inventor or co-inventor. In addition, we may have ownership disputes arise from conflicting obligations of consultants or others 
who are involved in developing our product candidates. Litigation may be necessary to defend against these and other claims challenging 
inventorship or ownership. If we fail to successfully defend against such litigation or claims, in addition to paying monetary damages, we may 
lose valuable intellectual property rights, such as exclusive ownership of, or right to use, valuable intellectual property. 
56
 
Even if we are successful in defending against such litigation and claims, such proceedings could result in substantial costs and 
distract our management and other employees. Because of the substantial amount of discovery required in connection with intellectual 
property litigation, there is a risk that some of our confidential information could be compromised by disclosure during litigation. There could 
also be public announcements of the results of hearings, motions, or other interim proceedings or developments related to such litigation or 
claims. If securities analysts or investors perceive these results to be negative, it could have a material adverse effect on the price of our 
common stock.
We may be subject to claims that our employees, consultants, or independent contractors have wrongfully used or disclosed 
confidential information of third parties or that our employees have wrongfully used or disclosed alleged trade secrets of their 
former employers. 
We employ certain individuals who were previously employed at universities or other biotechnology or pharmaceutical companies, 
including our competitors or potential competitors. Our efforts to vet our employees, consultants, and independent contractors and prevent 
their use of the proprietary information or know-how of others in their work for us may not be successful, and we may in the future be subject 
to claims that our employees, consultants, or independent contractors have wrongfully used or disclosed confidential information of third 
parties. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or 
personnel, which could adversely impact our business. Even if we are successful in defending against such claims, litigation could result in 
substantial costs and distract management and other employees. 
Changes in U.S. patent law could diminish the value of patents in general, thereby impairing our ability to protect our products. 
As is the case with other biotechnology and pharmaceutical companies, our success is heavily dependent on intellectual property, 
particularly patents. Obtaining and enforcing patents in the biotechnology and pharmaceutical industries involves both technological and 
legal complexity. Therefore, obtaining and enforcing such patents is costly, time consuming, and inherently uncertain. In addition, the U.S. 
has recently enacted and is currently implementing wide-ranging patent reform legislation. Recent U.S. Supreme Court rulings have 
narrowed the scope of patent protection available in certain circumstances and weakened the rights of patent owners in certain situations. 
Additionally, there have been recent proposals for additional changes to the patent laws of the U.S. and other countries that, if adopted, could 
impact our ability to obtain patent protection for our proprietary technology or our ability to enforce our proprietary technology. Depending on 
future actions by the U.S. Congress, the U.S. courts, the USPTO and the relevant law-making bodies in other countries, the laws and 
regulations governing patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce our 
existing patents and patents that we might obtain in the future.
We may not be able to protect our intellectual property rights throughout the world. 
Filing, prosecuting, and defending patents on our products or product candidates in all countries throughout the world would be 
prohibitively expensive, and our intellectual property rights in some countries outside the U.S. can be less extensive than those in the U.S. In 
addition, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the U.S. 
Further, licensing partners such as KKC and Regeneron may not prosecute patents in certain jurisdictions in which we may obtain 
commercial rights, thereby precluding the possibility of later obtaining patent protection in these countries. Consequently, we may not be able 
to prevent third parties from practicing our inventions in all countries outside the U.S., or from selling or importing products made using our 
inventions in and into the U.S. or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained 
patent protection to develop their own products and may also export infringing products to territories where we have patent protection, but 
enforcement is not as strong as that in the U.S. These products may compete with our products, and our patents or other intellectual property 
rights may not be effective or sufficient to prevent them from competing. 
Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign jurisdictions. 
The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents, trade secrets, and 
other intellectual property protection, particularly those relating to biotechnology products, which could make it difficult for us to stop the 
infringement of our patents or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce our 
patent rights in foreign jurisdictions, whether or not successful, could result in substantial costs and divert our efforts and attention from other 
aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly, could put our patent applications at risk of 
not issuing, and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate and the damages 
or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights 
around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license. 
57
 
Risks Related to Our Business Operations 
We have no experience as a company developing or operating a manufacturing facility and may experience unexpected costs or 
delays or ultimately be unsuccessful in developing a facility. 
We  are  currently  constructing  our  gene  therapy  manufacturing  facility  in  Bedford,  Massachusetts,  which  we  currently  expect  to 
complete  in  2023.  We  do  not  have  experience  as  a  company,  however,  in  developing  a  manufacturing  facility  and  we  may  experience 
unexpected  costs  or  delays  or  ultimately  be  unsuccessful  in  developing  the  facility  or  manufacturing  capability.  Even  if  we  successfully 
complete construction of the facility and the facility is operational, we cannot assure that the plant will be fully utilized at all times, particularly 
as we begin manufacturing operations. We will also incur significant expenses and costs to operate the facility. As we expand our commercial 
footprint  to  multiple  geographies,  we  may  establish  multiple  manufacturing  facilities,  which  may  lead  to  regulatory  delays  or  prove  costly. 
Even if we are successful, we cannot assure that such additional capacity will be required or that our investment will be recouped. Further, 
our manufacturing capabilities could be affected by cost-overruns, unexpected delays, equipment failures, lack of capacity, labor shortages, 
natural  disasters,  power  failures,  program  failures,  actual  or  threatened  public  health  emergencies,  and  numerous  other  factors  that  could 
prevent us from realizing the intended benefits of our manufacturing strategy.
Our future success depends in part on our ability to retain our Founder, President, and Chief Executive Officer and to attract, 
retain, and motivate other qualified personnel. 
We are dependent on Emil D. Kakkis, M.D., Ph.D., our Founder, President, and Chief Executive Officer, the loss of whose services 
may adversely impact the achievement of our objectives. Dr. Kakkis could leave our employment at any time, as he is an “at will” employee. 
Recruiting and retaining other qualified employees, consultants, and advisors for our business, including scientific and technical personnel, 
will also be critical to our success. There is currently a shortage of skilled personnel in our industry, which is likely to continue. As a result, 
competition for skilled personnel is intense and the turnover rate can be high. Our new office work model (including the requirement at certain 
locations that employees work from our office on specified days), vaccination policy and other workforce actions taken in response to the 
COVID-19 pandemic has adversely impacted our ability to attract and retain certain employees or to recruit new qualified personnel. In 
addition, failure to succeed in preclinical or clinical studies may make it more challenging to recruit and retain qualified personnel. Over the 
last several years, we have also experienced certain executive leadership changes. Leadership transitions are inherently difficult to manage, 
cause uncertainty and disruption and could increase the likelihood of turnover of other key officers and employees. The inability to recruit and 
retain qualified personnel, or the loss of the services of Dr. Kakkis or any of other member of our executive leadership team or other key 
employee, may impede the progress of our research, development, and commercialization objectives. 
If we fail to obtain or maintain orphan drug exclusivity for our products, our competitors may sell products to treat the same 
conditions and our revenue will be reduced. 
Our business strategy focuses on the development of drugs that are eligible for FDA and EU orphan drug designation. In the U.S., 
orphan drug designation entitles a party to financial incentives such as opportunities for grant funding towards clinical study costs, tax 
advantages, and user-fee waivers. In addition, if a product receives the first FDA approval for the indication for which it has orphan 
designation, the product is entitled to orphan drug exclusivity, which means the FDA may not approve any other application to market the 
same drug for the same indication for a period of seven years, except in limited circumstances, such as a showing of clinical superiority over 
the product with orphan exclusivity or where the manufacturer is unable to assure sufficient product quantity. In the EU, orphan drug 
designation entitles a party to financial incentives such as reduction of fees or fee waivers and ten years of market exclusivity following drug 
or biological product approval. This period may be reduced to six years if the orphan drug designation criteria are no longer met, including 
where it is shown that the product is sufficiently profitable not to justify maintenance of market exclusivity. 
Because the extent and scope of patent protection for our products may in some cases be limited, orphan drug designation is 
especially important for our products for which orphan drug designation may be available. For eligible drugs, we plan to rely on the exclusivity 
period under the Orphan Drug Act to maintain a competitive position. If we do not obtain orphan drug exclusivity for our drug products and 
biologic products that do not have broad patent protection, our competitors may then sell the same drug to treat the same condition sooner 
than if we had obtained orphan drug exclusivity, and our revenue will be reduced. 
58
 
Even though we have orphan drug designation for Dojolvi for the treatment of fatty acid oxidation disorders in the U.S. and for various 
subtypes of LC-FAOD in Europe, as well as for Crysvita, Mepsevii, DTX301, DTX401 and UX701 in the U.S. and Europe, we may not be the 
first to obtain marketing approval for any particular orphan indication due to the uncertainties associated with developing pharmaceutical 
products. Further, even if we obtain orphan drug exclusivity for a product, that exclusivity may not effectively protect the product from 
competition because different drugs with different active moieties can be approved for the same condition or the same drug can be approved 
for a different indication unless there are other exclusivities such as new chemical entity exclusivity preventing such approval. Even after an 
orphan drug is approved, the FDA or EMA can subsequently approve the same drug with the same active moiety for the same condition if the 
FDA or EMA concludes that the later drug is safer, more effective, or makes a major contribution to patient care. Orphan drug designation 
neither shortens the development time or regulatory review time of a drug nor gives the drug any advantage in the regulatory review or 
approval process. 
Our operating results would be adversely impacted if our intangible assets become impaired. 
As a result of the accounting for our acquisition of Dimension Therapeutics, Inc., or Dimension, in November 2017, we have recorded 
on our Consolidated Balance Sheet intangible assets for in-process research and development, or IPR&D, related to DTX301 and DTX401. 
We also recorded an intangible asset related to our license from Regeneron for Evkeeza. We test the intangible assets for impairment 
annually during the fourth quarter and more frequently if events or changes in circumstances indicate that it is more likely than not that the 
asset is impaired. If the associated research and development effort is abandoned, the related assets will be written-off and we will record a 
noncash impairment loss on our Consolidated Statement of Operations. We have not recorded any impairments related to our intangible 
assets through the end of December 31, 2022.
We may not be successful in our efforts to identify, license, discover, develop, or commercialize additional product candidates. 
The success of our business depends upon our ability to identify, license, discover, develop, or commercialize additional product 
candidates in addition to the continued clinical testing, potential approval, and commercialization of our existing product candidates. 
Research programs to identify and develop new product candidates, such as those under our collaboration with Arcturus, require substantial 
technical, financial, and human resources. We may focus our efforts and resources on potential programs or product candidates that 
ultimately prove to be unsuccessful. Our research programs or licensing efforts may fail to yield additional product candidates for clinical 
development and commercialization for a number of reasons, including but not limited to the following: 
•
•
•
•
•
•
•
•
•
•
our research or business development methodology or search criteria and process may be unsuccessful in identifying potential 
product candidates; 
we may not be able or willing to assemble sufficient technical, financial or human resources to acquire or discover additional 
product candidates; 
we may face competition in obtaining and/or developing additional product candidates; 
our product candidates may not succeed in research, discovery, preclinical or clinical testing; 
our potential product candidates may be shown to have harmful side effects or may have other characteristics that may make the 
products unmarketable or unlikely to receive marketing approval; 
competitors may develop alternatives that render our product candidates obsolete or less attractive; 
product candidates we develop may be covered by third parties’ patents or other exclusive rights; 
the market for a product candidate may change during our program so that such a product may become unreasonable to continue 
to develop; 
a product candidate may not be capable of being produced in commercial quantities at an acceptable cost or at all; and 
a product candidate may not be accepted as safe and effective by regulatory authorities, patients, the medical community, or 
payors. 
If any of these events occur, we may be forced to abandon our development efforts for a program or programs, or we may not be able 
to identify, license, discover, develop, or commercialize additional product candidates, which would have a material adverse effect on our 
business and could potentially cause us to cease operations. 
We may expend our limited resources to pursue a particular product, product candidate or indication and fail to capitalize on 
products, product candidates or indications that may be more profitable or for which there is a greater likelihood of success.
59
 
Because we have limited financial and managerial resources, we focus our sales, marketing and research programs on certain 
products, product candidates or for specific indications. As a result, we may forego or delay pursuit of opportunities with other products or 
product candidates or other indications that later prove to have greater commercial potential. Our resource allocation decisions may cause us 
to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and 
development programs and product candidates may not yield any commercially viable products. If we do not accurately evaluate the 
commercial potential or target market for a particular product or product candidate, we may relinquish valuable rights through collaboration, 
licensing, or other royalty arrangements in cases in which it would have been advantageous for us to retain sole development and 
commercialization rights or we may allocate internal resources to a product candidate in a therapeutic area in which it would have been more 
advantageous to enter into a partnering arrangement.
Changes to healthcare and FDA laws, regulations, and policies may have a material adverse effect on our business and results of 
operations. 
As described above in “Item 1. Business - Government Regulation” and in the Risk Factor above entitled “ – The insurance coverage 
and reimbursement status of newly approved products is uncertain” there have been and continue to be a number of legislative initiatives to 
contain healthcare costs and to modify the regulation of drug and biologic products. We expect that additional state and federal healthcare 
reform measures and regulations will be adopted in the future, including proposals to reduce the exclusivity protections provided to already 
approved biological products and to provide biosimilar and interchangeable biologic products an easier path to approval. Any of these 
measures and regulations could limit the amounts that federal and state governments will pay for healthcare products and services, result in 
reduced demand for our product candidates or additional pricing pressures and affect our product development, testing, marketing approvals 
and post-market activities. 
Failure to comply with laws and regulations could harm our business and our reputation. 
Our business is subject to regulation by various federal, state, local and foreign governmental agencies, including agencies 
responsible for monitoring and enforcing employment and labor laws, workplace safety, privacy and security laws and regulations, and tax 
laws and regulations. In certain jurisdictions, these regulatory requirements may be more stringent than those in the U.S., and in other 
circumstances these requirements may be more stringent in the U.S.
In particular, our operations are directly, and indirectly through our customers, subject to various federal and state fraud and abuse 
laws, including, without limitation, the federal Anti-Kickback Statute, the federal False Claims Act, and physician sunshine laws and 
regulations; and patient and non-patient privacy regulations, including the GDPR and the California Consumer Privacy Act, or CCPA, 
including amendments from the California Privacy Rights Act, or CPRA, as described above in “Item 1. Business – Government Regulation”. 
Because of the breadth of these laws and the narrowness of the statutory exceptions and safe harbors available, it is possible that some of 
our business activities could be subject to challenge under one or more of such laws. For instance, one of our programs for sponsored 
genetic testing to help patients receive an accurate diagnosis is the subject of an ongoing review by applicable governmental authorities of 
compliance with various fraud and abuse laws; we cannot assure that such program, or our other operations or programs, will not be found to 
violate such laws.
The GDPR imposes a number of strict obligations and restrictions on the ability to process personal data of individuals, in particular 
with respect to special categories of personal data like health data (e.g., reliance on a legal basis, information to individuals, notification to 
relevant national data protection authorities in case of personal data breach and implementation of appropriate security measures). EU 
member states may also impose additional requirements in relation to special categories of personal data through their national legislation. In 
addition, the GDPR imposes specific restrictions on the transfer of personal data to countries outside of the EEA that are not considered by 
the European Commission as providing an adequate level of protection (including the U.S.). Appropriate safeguards are required to enable 
such transfers (e.g., reliance on standard contractual clauses and transfer risk assessments). There are also several compliance 
requirements under the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, as amended by the Health Information 
Technology for Economic and Clinical Health Act, or HITECH, and implementing regulations that create requirements relating to the privacy 
and security of protected health information. Those requirements are also applicable, in many instances, to business associates of covered 
entities. In some cases, depending on our business operations and contractual agreements, including through the conduct of clinical trials, 
we are subject to HIPAA requirements. Also, we may be subject to additional federal, state and local privacy laws and regulations in the U.S., 
including new and recently enacted laws (such as CCPA and CPRA), that may apply to us and/or our service providers now or in the future 
and that require that we take measures to be transparent regarding, honor rights with respect to, and protect the privacy and security of 
certain information we gather and use in our business, including personal information, particularly personal information that is not otherwise 
subject to HIPAA.
60
 
If our operations are found to be in violation of any of the laws described above or any other governmental regulations that apply to us, 
we may be subject to penalties, including civil and criminal penalties, damages, fines, exclusion from participation in government health care 
programs, such as Medicare and Medicaid, imprisonment, disgorgement of profits, and the curtailment or restructuring of our operations. If 
any governmental sanctions, fines, or penalties are imposed, or if we do not prevail in any possible civil or criminal litigation, our business, 
operating results, financial condition and our reputation could be harmed. In addition, responding to any action will likely result in a significant 
diversion of management’s attention and resources and an increase in professional fees.
Our research and development activities, including our process and analytical development activities in our quality control laboratory, 
and our and our third-party manufacturers’ and suppliers’ activities involve the controlled storage, use, and disposal of hazardous materials, 
including the components of our product candidates, such as viruses, and other hazardous compounds, which subjects us to laws and 
regulations governing such activities. In some cases, these hazardous materials and various wastes resulting from their use are stored at our 
or our manufacturers’ facilities pending their use and disposal. We cannot eliminate the risk of contamination, which could cause an 
interruption of our commercialization efforts, research and development efforts, and business operations or environmental damage that could 
result in costly clean-up and liabilities under applicable laws and regulations governing the use, storage, handling, and disposal of these 
materials and specified waste products. We cannot guarantee that the safety procedures utilized by us and our third-party manufacturers for 
handling and disposing of these materials comply with the standards prescribed by these laws and regulations, or eliminate the risk of 
accidental contamination or injury from these materials. In such an event, we may be held liable for any resulting damages—and such liability 
could exceed our resources—and state or federal or other applicable authorities may curtail our use of certain materials and/or interrupt our 
business operations. Furthermore, environmental laws and regulations are complex, change frequently, and have tended to become more 
stringent. We cannot predict the impact of such changes and cannot be certain of our future compliance.
Additionally, as we and our employees increasingly use social media tools as a means of communication with the public, there is a risk 
that the use of social media by us or our employees to communicate about our products or business may cause to be found in violation of 
applicable laws, despite our attempts to monitor such social media communications through company policies and guidelines. In addition, our 
employees may knowingly or inadvertently make use of social media in ways that may not comply with our company policies or other legal or 
contractual requirements, which may give rise to liability, lead to the loss of trade secrets or other intellectual property, cause reputational 
harm or result in public exposure of personal information of our employees, clinical trial patients, customers, and others.
International expansion of our business exposes us to business, regulatory, political, operational, financial, and economic risks 
associated with doing business outside of the U.S. 
Our business strategy includes international expansion. We currently conduct clinical studies and regulatory activities and we also 
commercialize products outside of the U.S. Doing business internationally involves a number of risks, including but not limited to: 
•
•
•
•
•
•
•
•
•
multiple, conflicting, and changing laws and regulations such as privacy and data regulations, transparency regulations, tax laws, 
export and import restrictions, employment laws, regulatory requirements, and other governmental approvals, permits, and 
licenses;
introduction of new health authority requirements and/or changes in health authority expectations; 
failure by us to obtain and maintain regulatory approvals for the use of our products in various countries; 
additional potentially relevant third-party patent rights; 
complexities and difficulties in obtaining protection for, and enforcing, our intellectual property; 
difficulties in staffing and managing foreign operations; 
complexities associated with managing multiple payor reimbursement regimes, government payors, or patient self-pay systems; 
limits on our ability to penetrate international markets; 
financial risks, such as longer payment cycles, additional or more burdensome regulatory requirements of financial institutions 
outside of the U.S., difficulty collecting accounts receivable, the impact of local and regional financial crises on demand and 
payment for our products, and exposure to foreign currency exchange rate fluctuations; 
61
 
•
•
•
•
natural disasters and geopolitical and economic instability, including wars, terrorism, political unrest (including, for example the 
conflict between Russia and Ukraine and the rising tensions between China and Taiwan), results of certain elections and votes, 
actual or threatened public health emergencies and outbreak of disease (including for example, the COVID-19 pandemic), rising 
inflation, the potential recessionary environment, boycotts and resulting staffing shortages, adoption or expansion of government 
trade restrictions, and other business restrictions; 
certain expenses including, among others, expenses for travel, translation, and insurance; 
regulatory and compliance risks that relate to maintaining accurate information and control over commercial operations and 
activities that may fall within the purview of the U.S. Foreign Corrupt Practices Act, or FCPA, its books and records provisions, or 
its anti-bribery provisions, including those under the U.K. Bribery Act and similar foreign laws and regulations; and
regulatory and compliance risks relating to doing business with any entity that is subject to sanctions administered by the Office of 
Foreign Assets Control of the U.S. Department of the Treasury. 
Any of these factors could significantly harm our future international expansion and operations and, consequently, our results of 
operations. 
Risks generally associated with the expansion of our enterprise resource planning. or ERP, system may adversely affect our 
business and results of operations or the effectiveness of our internal controls over financial reporting.
We are in the process of expanding our company-wide ERP system to upgrade certain existing business, operational, and financial 
processes related to our gene therapy manufacturing facility, which we currently expect to be completed in 2023. The ERP expansion is a 
complex and time-consuming project. Our results of operations could be adversely affected if we experience time delays or cost overruns 
during the ERP expansion process, or if the ERP system or associated process changes do not give rise to the benefits that we expect. This 
project has required and may continue to require investment of capital and human resources, the re-engineering of processes of our 
business, and the attention of many employees who would otherwise be focused on other aspects of our business. Any deficiencies in the 
design and implementation of the expanded ERP system could result in potentially much higher costs than we had incurred and could 
adversely affect our ability to develop and launch solutions, provide services, fulfill contractual obligations, file reports with the SEC in a 
timely manner, operate our business or otherwise affect our controls environment. Any of these consequences could have an adverse effect 
on our results of operations and financial condition.
Our business and operations may be materially adversely affected in the event of computer system failures or security breaches.
Cybersecurity incidents, including phishing attacks and attempts to misappropriate or compromise confidential or proprietary 
information or sabotage enterprise IT systems are becoming increasingly frequent and more sophisticated. The information and data 
processed and stored in our technology systems, and those of our strategic partners, CROs, contract manufacturers, suppliers, distributors 
or other third parties for which we depend to operate our business, may be vulnerable to loss, damage, denial-of-service, unauthorized 
access or misappropriation. Data security breaches can occur as a result of malware, hacking, business email compromise, ransomware 
attacks, phishing or other cyberattacks directed by third parties. We, and certain of the third parties for which we depend on to operate our 
business, have experienced cybersecurity incidents, including third party unauthorized access to and misappropriation of financial 
information. Further, risks of unauthorized access and cyber-attacks have increased as most of our personnel, and the personnel of many 
third-parties with which we do business, have adopted flexible working arrangements as a result of the COVID-19 pandemic. Improper or 
inadvertent behavior by employees, contractors and others with permitted access to our systems, pose a risk that sensitive data may be 
exposed to unauthorized persons or to the public. A system failure or security breach that interrupts our operations or the operations at one 
of our third-party vendors or partners could result in intellectual property and other proprietary or confidential information being lost or stolen 
or a material disruption of our drug development programs and commercial operations. For example, the loss of clinical trial data from 
ongoing or planned clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or 
reproduce the data. To the extent that any disruption or security breach results in a loss of or damage to our data or applications, loss of 
trade secrets or inappropriate disclosure of confidential or proprietary information, including protected health information, or personal 
information of employees or former employees, access to our clinical data, or disruption of the manufacturing process, we could incur liability 
and the further development of our drug candidates could be delayed. Further, we could incur significant costs to investigate and mitigate 
such cybersecurity incidents. A security breach that results in the unauthorized access, use or disclosure of personal information also 
requires us to notify individuals, governmental authorities, credit reporting agencies, or other parties, as applicable, pursuant to privacy and 
security laws and regulations or other obligations. Such a security breach could harm our reputation, erode confidence in our information 
security measures, and lead to regulatory scrutiny and result in penalties, fines, indemnification claims, litigation and potential civil or criminal 
liability. 
62
 
We or the third parties upon whom we depend may be adversely affected by earthquakes or other natural disasters and our 
business continuity and disaster recovery plans may not adequately protect us from a serious disaster. 
Our corporate headquarters and one of our laboratories are located in the San Francisco Bay Area, and our collaboration partner for 
Crysvita, KKC, is located in Japan, which have both in the past experienced severe earthquakes and other natural disasters. We do not carry 
earthquake insurance. Earthquakes or other natural disasters could severely disrupt our operations or those of our collaborators, and have a 
material adverse effect on our business, results of operations, financial condition, and prospects. We have also experienced power outages 
as a result of wildfires in the San Francisco Bay Area which are likely to continue to occur in the future. If a natural disaster, power outage, or 
other event occurred that prevented us from using all or a significant portion of our headquarters, that damaged critical infrastructure (such as 
the manufacturing facilities of our third-party contract manufacturers) or that otherwise disrupted operations, it may be difficult or, in certain 
cases, impossible for us to continue our business for a substantial period of time. The disaster recovery and business continuity plans we 
have in place currently are limited and are may be inadequate in the event of a serious disaster or similar event. We may incur substantial 
expenses as a result of the limited nature of our disaster recovery and business continuity plans, which, particularly when taken together with 
our lack of earthquake insurance, could have a material adverse effect on our business. 
We may acquire companies or products or engage in strategic transactions, which could divert our management’s attention and 
cause us to incur various costs and expenses, or result in fluctuations with respect to the value of such investment, which could 
impact our operating results. 
We may acquire or invest in businesses or products that we believe could complement or expand our business or otherwise offer 
growth opportunities. For example, we acquired Dimension in November 2017 and GeneTx in July 2022. The pursuit of potential acquisitions 
or investments may divert the attention of management and may cause us to incur various costs and expenses in identifying, investigating, 
and pursuing them, whether or not they are consummated. We may not be able to identify desirable acquisitions or investments or be 
successful in completing or realizing anticipated benefits from such transactions. We may experience difficulties in assimilating the 
personnel, operations and products of the acquired companies, management’s attention may be diverted from other business concerns and 
we may potentially lose key employees of the acquired company. If we are unable to successfully or timely integrate the operations of 
acquired companies with our business, we may incur unanticipated liabilities and be unable to realize the revenue growth, synergies and 
other anticipated benefits resulting from the acquisition, and our business, results of operations and financial condition could be materially 
and adversely affected.
The value of our investments in other companies or businesses may also fluctuate significantly and impact our operating results 
quarter to quarter or year to year. For instance, in June 2019, we purchased 2,400,000 shares of common stock of Arcturus and in May 2020, 
we exercised our option to purchase an additional 600,000 shares of Arcturus’ common stock pursuant to the terms of our equity purchase 
agreement with Arcturus; we have sold all our shares as of December 31, 2022. We also purchased 7,825,797 shares of common stock of 
Solid in October 2020. We have elected to apply the fair value option to account for our equity investments in Arcturus and Solid. As a result, 
increases or decreases in the stock price of equity investments have resulted in and will result in accompanying changes in the fair value of 
our investments, and cause substantial volatility in, our operating results for the reporting period. As the fair value of our investment in Solid 
is dependent on the stock price of Solid, which has recently seen wide fluctuations, the value of our investments and the impact on our 
operating results may similarly fluctuate significantly from quarter to quarter and year to year such that period-to-period comparisons may not 
be a good indication of the future value of the investments and our future operating results.
Risks Related to Ownership of Our Common Stock 
The market price of our common stock may be highly volatile. 
The market price of our common stock has been, and is likely to continue to be, volatile, including for reasons unrelated to changes in 
our business. Our stock price could be subject to wide fluctuations in response to a variety of factors, including but not limited to the 
following: 
•
•
•
•
adverse results or delays in preclinical or clinical studies; 
any inability to obtain additional funding; 
any delay in filing an IND, NDA, BLA, MAA, or other regulatory submission for any of our product candidates and any adverse 
development or perceived adverse development with respect to the applicable regulatory agency’s review of that IND, NDA, BLA, 
MAA, or other regulatory submission; 
the perception of limited market sizes or pricing for our products and product candidates; 
63
 
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
decisions by our collaboration partners with respect to the indications for our products and product candidates in countries where 
they have the right to commercialize the products and product candidates;
decisions by our collaboration partners regarding market access and pricing in countries where they have the right to 
commercialize our products and product candidates;
failure to successfully develop and commercialize our products and product candidates; 
the level of revenue we receive from our commercialized products or from named patient sales;
post-marketing safety issues; 
failure to maintain our existing strategic collaborations or enter into new collaborations; 
failure by us or our licensors and strategic collaboration partners to prosecute, maintain, or enforce our intellectual property rights; 
changes in laws or regulations applicable to our products; 
any inability to obtain adequate product supply for our products and product candidates or the inability to do so at acceptable 
prices; 
adverse regulatory decisions; 
introduction of new products, services, or technologies by our competitors; 
changes in or failure to meet or exceed financial projections or other guidance we may provide to the public; 
changes in or failure to meet or exceed the financial projections or other expectations of the investment community; 
the perception of the pharmaceutical industry or our company by the public, legislatures, regulators, and the investment 
community; 
the perception of the pharmaceutical industry’s approach to drug pricing;
announcements of significant acquisitions, strategic partnerships, joint ventures, or capital commitments by us, our strategic 
collaboration partners, or our competitors; 
the integration and performance of any businesses we have acquired or may acquire;
disputes or other developments relating to proprietary rights, including patents, litigation matters, and our ability to obtain patent 
protection for our technologies; 
additions or departures of key scientific or management personnel; 
significant investigations, regulatory proceedings or lawsuits, including patent or stockholder litigation; 
securities or industry analysts’ reports regarding our stock, or their failure to issue such reports; 
changes in the market valuations of similar companies; 
general market, macroeconomic conditions or geopolitical developments, including the impact from the COVID-19 pandemic, 
rising inflation and the potential recessionary environment;
sales of our common stock by us or our stockholders in the future; and 
trading volume of our common stock. 
In addition, biotechnology and biopharmaceutical companies in particular have experienced extreme price and volume fluctuations that 
have often been unrelated or disproportionate to the operating performance of these companies. Broad market and industry factors may 
negatively affect the market price of our common stock, regardless of our actual operating performance. 
Future sales and issuances of our common stock or rights to purchase common stock, including pursuant to our equity incentive 
plans, could result in additional dilution of the percentage ownership of our stockholders and could cause our stock price to fall. 
We will need additional capital in the future to continue our planned operations. To the extent we raise additional capital by issuing 
equity securities, our stockholders may experience substantial dilution. We may sell common stock, convertible securities, or other equity 
securities in one or more transactions at prices and in a manner we determine from time to time. If we sell common stock, convertible 
securities, or other equity securities in more than one transaction, investors may be materially diluted by subsequent sales. These sales may 
also result in material dilution to our existing stockholders, and new investors could gain rights superior to our existing stockholders. 
64
 
Pursuant to our 2014 Incentive Plan, or the 2014 Plan, our management is authorized to grant stock options and other equity-based 
awards to our employees, directors, and consultants. At December 31, 2022, there were 2,227,385 shares available for future grants under 
the 2014 Plan. Through January 1, 2024, the number of shares available for future grant under the 2014 Plan will automatically increase on 
January 1 of each year by the lesser of 2,500,000 shares or 4% of all shares of our capital stock outstanding as of December 31 of the prior 
calendar year, subject to the ability of our compensation committee to take action to reduce the size of the increase in any given year. 
Pursuant to our 2014 Employee Stock Purchase Plan, or the 2014 ESPP, eligible employees can acquire shares of our common stock 
at a discount to the prevailing market price. At December 31, 2022, there were 4,585,921 shares available for issuance under the 2014 
ESPP. Through January 1, 2024, the number of shares available for issuance under the 2014 ESPP will automatically increase on January 1 
of each year by the lesser of 1,200,000 shares or 1% of all shares of our capital stock outstanding as of December 31 of the prior calendar 
year, subject to the ability of our compensation committee to take action to reduce the size of the increase in any given year.
In February 2021, our board of directors adopted the Employment Inducement Plan, or the Inducement Plan, with a maximum of 
500,000 shares available for grant under the plan. At December 31, 2022, there were 247,369 shares available for issuance under the 
Inducement Plan. If our board of directors elects to increase the number of shares available for future grant under the 2014 Plan, the 2014 
ESPP, or the Inducement Plan, our stockholders may experience additional dilution, which could cause our stock price to fall.
Provisions in our amended and restated certificate of incorporation and by-laws, as well as provisions of Delaware law, could make 
it more difficult for a third party to acquire us or increase the cost of acquiring us, even if doing so would benefit our stockholders, 
or remove our current management. 
Our amended and restated certificate of incorporation, amended and restated by-laws, and Delaware law contain provisions that may 
have the effect of delaying or preventing a change in control of us or changes in our management. Our amended and restated certificate of 
incorporation and by-laws include provisions that: 
•
•
•
•
•
•
•
•
•
authorize “blank check” preferred stock, which could be issued by our board of directors without stockholder approval and may 
contain voting, liquidation, dividend, and other rights superior to our common stock; 
create a classified board of directors whose members serve staggered three-year terms; 
specify that special meetings of our stockholders can be called only by our board of directors or the chairperson of our board of 
directors; 
prohibit stockholder action by written consent; 
establish an advance notice procedure for stockholder approvals to be brought before an annual meeting of our stockholders, 
including proposed nominations of persons for election to our board of directors; 
provide that our directors may be removed only for cause; 
provide that vacancies on our board of directors may be filled only by a resolution adopted by the board of directors; 
expressly authorize our board of directors to modify, alter or repeal our amended and restated by-laws; and 
require holders of 75% of our outstanding common stock to amend specified provisions of our amended and restated certificate of 
incorporation and amended and restated by-laws. 
These provisions, alone or together, could delay, deter, or prevent hostile takeovers and changes in control or changes in our 
management. 
In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General 
Corporation Law, which limits the ability of stockholders owning in excess of 15% of our outstanding voting stock to merge or combine with 
us. Further, no stockholder is permitted to cumulate votes at any election of directors because this right is not included in our amended and 
restated certificate of incorporation.
Any provision of our amended and restated certificate of incorporation or amended and restated by-laws or Delaware law that has the 
effect of delaying or deterring a change in control could limit the opportunity for our stockholders to receive a premium for their shares of our 
common stock, and could also affect the price that some investors are willing to pay for our common stock. 
65
 
Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware is the sole and 
exclusive forum for substantially all disputes between us and our stockholders, which could limit our stockholders’ ability to 
obtain a favorable judicial forum for disputes with us or our directors, officers or employees.
Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware is the sole and 
exclusive forum for (1) any derivative action or proceeding brought on our behalf, (2) any action asserting a claim of breach of fiduciary duty 
owed by any of our directors, officers, or other employees to us or to our stockholders, (3) any action asserting a claim against us arising 
under the Delaware General Corporation Law or under our amended and restated certificate of incorporation or bylaws, or (4) any action 
against us asserting a claim governed by the internal affairs doctrine. The choice of forum provision may limit a stockholder’s ability to bring a 
claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, or other employees, which may discourage such 
lawsuits against us and our directors, officers, and other employees. Alternatively, if a court were to find the choice of forum provision 
contained in our amended and restated certificate of incorporation to be inapplicable or unenforceable in an action, we may incur additional 
costs associated with resolving such action in other jurisdictions, which could harm our business, operating results and financial condition.
General Risk Factors
If we are unable to maintain effective internal control over financial reporting, investors may lose confidence in the accuracy and 
completeness of our financial reports and the market price of our stock may decrease. 
The Sarbanes-Oxley Act requires, among other things, that we maintain effective internal controls for financial reporting and disclosure 
controls and procedures. In particular, we are required to perform system and process evaluation and testing of our internal controls over 
financial reporting to allow management to report on the effectiveness of our internal controls over financial reporting, as required by Section 
404(a) of the Sarbanes-Oxley Act. Section 404(b) of the Sarbanes-Oxley Act also requires our independent auditors to attest to, and report 
on, this management assessment. Ensuring that we have adequate internal controls in place so that we can produce accurate financial 
statements on a timely basis is a costly and time-consuming effort that will need to be evaluated frequently. If we are not able to comply with 
the requirements of Section 404 or if we or our independent registered public accounting firm are unable to attest to the effectiveness of our 
internal control over financial reporting, investors may lose confidence in the accuracy and completeness of our financial reports, the market 
price of our stock could decline and we could be subject to sanctions or investigations by Nasdaq, the SEC, or other regulatory authorities, 
which would require additional financial and management resources.
66
 
We may incur additional tax liabilities related to our operations.
We have a multinational tax structure and are subject to income tax in the U.S. and various foreign jurisdictions. Our effective tax rate 
is influenced by many factors including changes in our operating structure, changes in the mix of our earnings among countries, our 
allocation of profits and losses among our subsidiaries, our intercompany transfer pricing agreements and rules relating to transfer pricing, 
the availability of U.S. research and development tax credits, and future changes in tax laws and regulations in the U.S. and foreign 
countries. Significant judgment is required in determining our tax liabilities including management’s judgment for uncertain tax positions. The 
Internal Revenue Service, other domestic taxing authorities, or foreign taxing authorities may disagree with our interpretation of tax laws as 
applied to our operations. Our reported effective tax rate and after-tax cash flows may be materially and adversely affected by tax 
assessments in excess of amounts accrued for our financial statements. This could materially increase our future effective tax rate thereby 
reducing net income and adversely impacting our results of operations for future periods.
Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited. 
We have incurred substantial losses during our history. To the extent that we continue to generate taxable losses, unused taxable 
losses will, subject to certain limitations, carry forward to offset future taxable income, if any, until such unused losses expire. Under Sections 
382 and 383 of the Internal Revenue Code of 1986, as amended, or the IRC, if a corporation undergoes an “ownership change,” generally 
defined as a greater than 50% change (by value) in its equity ownership over a three-year period, the corporation’s ability to use its pre-
change net operating loss carryforwards, or NOL carryforwards, and other pre-change tax attributes (such as research tax credits) to offset 
its post-change income may be limited. An analysis to determine limitations upon our NOL carryforwards and other pre-change tax attributes 
for ownership changes that have occurred previously has been performed, resulting in a permanent decrease of federal and state NOL 
carryforwards in the amount of $7.2 million and a permanent decrease in federal research tax credit carryforwards in the amount of $0.2 
million. As a result of these decreases and others that may occur as a result of future ownership changes, our ability to use our pre-change 
NOL carryforwards and other tax attribute carryforwards to offset U.S. federal taxable income and tax liabilities is limited and may become 
subject to even greater limitations, which could potentially accelerate or permanently increase future federal tax liabilities for us. In addition, 
there may be periods during which the use of state income tax NOL carryforwards and other state tax attribute carryforwards (such as state 
research tax credits) are suspended or otherwise limited, which could potentially accelerate or permanently increase future state tax liabilities 
for us.
Litigation may substantially increase our costs and harm our business.
We have been, and may in the future become, party to lawsuits including, without limitation, actions, claims and proceedings in the 
ordinary course of business relating to our directors, officers, stockholders, intellectual property, and employment matters and policies, which 
will cause us to incur legal fees and other costs related thereto, including potential expenses for the reimbursement of legal fees of officers 
and directors under indemnification obligations. The expense of defending against such claims or litigation may be significant and there can 
be no assurance that we will be successful in any defense. Further, the amount of time that may be required to resolve such claims or 
lawsuits is unpredictable, and these actions may divert management’s attention from the day-to-day operations of our business, which could 
adversely affect our business, results of operations, and cash flows. Litigation is subject to inherent uncertainties, and an adverse result in 
such matters that may arise from time to time could have a material adverse effect on our business, results of operations, and financial 
condition.
Our business and operations could be negatively affected if we become subject to stockholder activism or hostile bids, which 
could cause us to incur significant expense, hinder execution of our business strategy and impact our stock price.
Stockholder activism, which takes many forms and arises in a variety of situations, has been increasingly prevalent. Stock price 
declines may also increase our vulnerability to unsolicited approaches. If we become the subject of certain forms of stockholder activism, 
such as proxy contests or hostile bids, the attention of our management and our board of directors may be diverted from execution of our 
strategy. Such stockholder activism could give rise to perceived uncertainties as to our future strategy, adversely affect our relationships with 
business partners and make it more difficult to attract and retain qualified personnel. Also, we may incur substantial costs, including 
significant legal fees and other expenses, related to activist stockholder matters. Our stock price could be subject to significant fluctuation or 
otherwise be adversely affected by the events, risks and uncertainties of any stockholder activism.
67
 
Increased scrutiny regarding ESG practices and disclosures could result in additional costs and adversely impact our business 
and reputation.
Companies across all industries are facing increasing scrutiny relating to their Environmental, Social and Governance, or “ESG,” 
practices and disclosures and institutional and individual investors are increasingly using ESG screening criteria in making investment 
decisions. Our disclosures on these matters or a failure to satisfy evolving stakeholder expectations for ESG practices and reporting may 
potentially harm our reputation and impact employee retention and access to capital. In addition, our failure, or perceived failure, to pursue or 
fulfill our goals, targets, and objectives or to satisfy various reporting standards within the timelines we announce, or at all, could expose us to 
government enforcement actions and private litigation.
Our ability to achieve any goal or objective, including with respect to environmental and diversity initiatives and compliance with ESG 
reporting standards, is subject to numerous risks, many of which are outside of our control. Examples of such risks include the availability 
and cost of technologies and products that meet sustainability and ethical supply chain standards, evolving regulatory requirements affecting 
ESG standards or disclosures, our ability to recruit, develop, and retain diverse talent in our labor markets, and our ability to develop 
reporting processes and controls that comply with evolving standards for identifying, measuring and reporting ESG metrics. As ESG best-
practices, reporting standards, and disclosure requirements continue to develop, we may incur increasing costs related to maintaining or 
achieving our ESG goals in addition to ESG monitoring and reporting.
68
 
 
Item 1B. Unresolved Staff Comments 
None. 
Item 2. Properties
Our primary operations are conducted at the leased facilities summarized in the below table. In 2020, we completed our purchase of 
land located in Bedford, Massachusetts and we are currently in the process of completing construction of our gene therapy manufacturing 
facility. We believe our facilities are adequate and suitable for our current needs and that we will be able to obtain new or additional leased 
space in the future when necessary.
Property Location
Novato, California
Novato, California
Brisbane, California
South San Francisco, California
Cambridge, Massachusetts
Woburn, Massachusetts
Woburn, Massachusetts
Bedford, Massachusetts
Item 3. Legal Proceedings 
Use
Lease Expiration Date
  Headquarters and office
  Laboratory and office
  Office
  Laboratory and office
  Laboratory and office
  Laboratory and office
  Laboratory and office
  Manufacturing facility
  December 2024
  October 2028
  June 2026
  March 2025
  December 2023
  April 2025
  October 2026
  Owned property
We are not currently a party to any material legal proceedings. We may, however, in the ordinary course of business face various 
claims brought by third parties or government regulators and we may, from time to time, make claims or take legal actions to assert our 
rights, including claims relating to our directors, officers, stockholders, intellectual property rights, employment matters and the safety or 
efficacy of our products. Any of these claims could subject us to costly litigation and, while we generally believe that we have adequate 
insurance to cover many different types of liabilities, our insurance carriers may deny coverage, may be inadequately capitalized to pay on 
valid claims, or our policy limits may be inadequate to fully satisfy any damage awards or settlements. If this were to happen, the payment of 
any such awards could have a material adverse effect on our consolidated operations, cash flows and financial position. Additionally, any 
such claims, whether or not successful, could damage our reputation and business. 
Item 4. Mine Safety Disclosures 
Not applicable. 
69
 
 
 
 
 
 
 
Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities 
Our common stock has been traded on The Nasdaq Global Select Market since January 31, 2014 under the symbol “RARE”. As of 
February 13, 2023, we had 7 holders of record of our common stock. Certain shares are held in “street” name and, accordingly, the number 
of beneficial owners of such shares is not known or included in the foregoing number.
PART II 
STOCK PRICE PERFORMANCE GRAPH
The following stock performance graph compares our total stock return with the total return for (i) the Nasdaq Composite Index and (ii) 
the Nasdaq Biotechnology Index for the period from December 31, 2017 through December 31, 2022. The figures represented below 
assume an investment of $100 in our common stock at the closing price of $46.38 on December 31, 2017 and in the Nasdaq Composite 
Index, or IXIC, and the Nasdaq Biotechnology Index, or NBI, on December 31, 2017 and the reinvestment of dividends into shares of 
common stock. The comparisons in the table are required by the SEC and are not intended to forecast or be indicative of the possible future 
performance of our common stock. This graph shall not be deemed “soliciting material” or be deemed “filed” for purposes of Section 18 of the 
Securities Exchange Act of 1934, as amended, or the Exchange Act, or otherwise subject to the liabilities under that section, and shall not be 
deemed to be incorporated by reference into any of our filings under the Securities Act of 1933, as amended, or the Securities Act, whether 
made before or after the date hereof and irrespective of any general incorporation language in any such filing.
$100 Investment in Stock or 
Index
Ultragenyx Pharmaceutical 
Inc.
NASDAQ Composite Index
NASDAQ Biotechnology 
Index
Dividend Policy 
Ticker
RARE
^IXIC
^NBI
December 31, 
2017
December 31, 
2018
December 31, 
2019
December 31, 
2020
December 31, 
2021
December 31, 
2022
  $
  $
  $
100.00  
100.00  
100.00  
  $
  $
  $
93.75     $
92.09     $
298.47  
  $
181.31     $
96.12     $
129.97     $
186.69  
  $
226.63     $
90.68     $
112.81     $
141.78  
  $
140.88     $
99.89  
151.61  
125.52  
We have never declared or paid cash dividends on our common stock. We currently intend to retain all available funds and any future 
earnings, if any, to fund the development, operation, and expansion of our business, and we do not anticipate paying any cash dividends on 
our common stock in the foreseeable future. Any future determination to pay dividends will be made at the discretion of our board of directors 
or any authorized committee thereof. 
Unregistered Sales of Equity Securities
None.
Issuer’s Purchases of Equity Securities 
None. 
Item 6. Reserved 
70
 
 
  
 
 
 
 
 
   
   
   
   
   
   
 
 
 
 
 
 
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations 
MANAGEMENT’S DISCUSSION AND ANALYSIS OF 
FINANCIAL CONDITION AND RESULTS OF OPERATIONS 
You should read the following discussion and analysis of our financial condition and results of operations together with our 
Consolidated Financial Statements and related notes included elsewhere in this Annual Report.
This discussion and analysis generally covers our financial condition and results of operations for the year ended December 31, 2022, 
including year-over-year comparisons versus the year ended December 31, 2021. Our Annual Report on Form 10-K for the year ended 
December 31, 2021 includes a discussion and analysis of our financial condition and results of operations for the year ended December 31, 
2020 in "Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.”
Overview 
Ultragenyx Pharmaceutical Inc., we or the Company, is a biopharmaceutical company focused on the identification, acquisition, 
development, and commercialization of novel products for the treatment of serious rare and ultra-rare genetic diseases. We target diseases 
for which the unmet medical need is high, the biology for treatment is clear, and for which there are typically no approved therapies treating 
the underlying disease. Our strategy, which is predicated upon time- and cost-efficient drug development, allows us to pursue multiple 
programs in parallel with the goal of delivering safe and effective therapies to patients with the utmost urgency.
Approved Therapies and Clinical Product Candidates
Our current approved therapies and clinical-stage pipeline consist of four product categories: biologics, small molecules, gene therapy, 
and nucleic acid product candidates. We have four commercially approved products, consisting of Crysvita® (burosumab) for the treatment 
of X-linked hypophosphatemia, or XLH, and tumor-induced osteomalacia, or TIO, Mepsevii® (vestronidase alfa) for the treatment of 
mucopolysaccharidosis VII, or MPSVII or Sly Syndrome, Dojolvi® (triheptanoin) for the treatment of long-chain fatty acid oxidation disorders, 
or LC-FAOD, and Evkeeza® (evinacumab) for the treatment of homozygous familial hypercholesterolemia, or HoFH. Please see “Item 1. 
Business” above for a description of our approved products and our clinical stage pipeline products.
Financial Operations Overview 
We are a biopharmaceutical company with a limited operating history. To date, we have invested substantially all of our efforts and 
financial resources in identifying, acquiring, and developing our products and product candidates, including conducting clinical studies and 
providing selling, general and administrative support for these operations. To date, we have funded our operations primarily from the sale of 
our equity securities, revenues from our commercial products, the sale of certain future royalties, and strategic collaboration arrangements.
We have incurred net losses in each year since inception. Our net losses were $707.4 million and $454.0 million for the years ended 
December 31, 2022 and 2021, respectively. Net loss for the years ended December 31, 2022 and 2021 included losses of $19.3 million and 
$42.1 million, respectively, resulting from changes in fair value of our investments in Arcturus Therapeutics Holdings Inc., or Arcturus, and 
Solid Biosciences Inc., or Solid, equity securities. Substantially all of our net losses have resulted from costs incurred in connection with our 
research and development programs and from selling, general and administrative costs associated with our operations.
For the year ended December 31, 2022, our total revenues increased to $363.3 million, compared to $351.4 million for the same 
period in 2021. The increase was driven by higher Crysvita collaboration revenue in the profit-share territory, increase in revenue for our 
approved products, and an increase in collaboration royalty revenue, partially offset by a decrease in collaboration and license revenue from 
the Daiichi Sankyo arrangement. 
As of December 31, 2022, we had $896.7 million in available cash, cash equivalents and marketable debt securities.
71
 
Critical Accounting Policies and Significant Judgments and Estimates 
Our management’s discussion and analysis of our financial condition and results of operations is based on our Consolidated Financial 
Statements, which have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of these 
Consolidated Financial Statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities 
and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported expenses incurred during 
the reporting periods. Our estimates are based on our historical experience and on various other factors that we believe are reasonable 
under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are 
not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. We 
periodically review our estimates as a result of changes in circumstances, facts and experience. The effects of material revisions in estimates 
are reflected in the financial statements prospectively from the date of the change in estimate. Our significant accounting policies are more 
fully described in Note 2 to our financial statements included elsewhere in this Annual Report.
We define our critical accounting policies as those GAAP accounting principles that require us to make subjective estimates and 
judgments about matters that are uncertain and are likely to have a material impact on our financial condition and results of operations as 
well as the specific manner in which we apply those principles. We believe the critical accounting policies used in the preparation of our 
financial statements that require significant estimates and judgments are as follows:
Accrued Research and Development, and Research and Development Expenses 
As part of the process of preparing consolidated financial statements, we are required to estimate and accrue expenses, the largest of 
which is related to accrued research and development expenses. This process involves reviewing contracts and purchase orders, identifying 
services that have been performed on our behalf, and estimating the level of service performed and the associated cost incurred for the 
service when we have not yet been invoiced or otherwise notified of the actual costs. 
We record accruals for estimated costs of research, preclinical and clinical studies, and manufacturing development. These costs are a 
significant component of our research and development expenses. A substantial portion of our ongoing research and development activities 
is conducted by third-party service providers. We accrue the costs incurred under our agreements with these third parties based on actual 
work completed in accordance with agreements established with these third parties. We determine the actual costs through discussions with 
internal personnel and external service providers as to the progress or stage of completion of the services and the agreed-upon fee to be 
paid for such services. We make significant judgments and estimates in determining the accrual balance in each reporting period. As actual 
costs become known, we adjust our accruals. Although we do not expect our estimates to be materially different from amounts actually 
incurred, our understanding of the status and timing of services performed relative to the actual status and timing of services performed may 
vary and could result in us reporting amounts that are too high or too low in any particular period. Our accrual is dependent, in part, upon the 
receipt of timely and accurate reporting from clinical research organizations and other third-party vendors. 
Research and development costs are expensed as incurred and consist of salaries and benefits, stock-based compensation, lab 
supplies, materials and facility costs, as well as fees paid to other nonemployees and entities that conduct certain research and development 
activities on our behalf. Amounts incurred in connection with collaboration and license agreements are also included in research and 
development expense. Payments made prior to the receipt of goods or services to be used in research and development are capitalized until 
the goods or services are received.
To date, there have been no material differences from our accrued estimated expenses to the actual clinical trial expenses; however, 
due to the nature of estimates, we cannot assure you that we will not make changes to our estimates in the future as we become aware of 
additional information about the status or conduct of our clinical studies and other research activities.
Revenue Recognition
Collaboration and License Revenue
We have certain license and collaboration agreements that are within the scope of Accounting Standards Codification, or ASC, 808, 
Collaborative Agreements, which provides guidance on the presentation and disclosure of collaborative arrangements. Generally, the 
classification of the transactions under the collaborative arrangements is determined based on the nature of contractual terms of the 
arrangement, along with the nature of the operations of the participants. We record our share of collaboration revenue, net of transfer pricing 
related to net sales in the period in which such sales occur, if we are considered as an agent in the arrangement. We are considered an 
agent when the collaboration partner controls the product before transfer to the customers and has the ability to direct the use of and obtain 
substantially all of the remaining benefits from the product. Funding received related to research and development services and 
commercialization costs is generally classified as a reduction of research and development expenses and selling, general and administrative 
expenses, respectively, in the Consolidated Statement of 
72
 
Operations, because the provision of such services for collaborative partners are not considered to be part of our ongoing major or central 
operations.
We also record royalty revenues under certain of our license or collaboration agreements in exchange for license of intellectual 
property. If we do not have any future performance obligations for these license or collaboration agreements, royalty revenue is recorded as 
the underlying sales occur.
In order to record collaboration revenue, we utilize certain information from our collaboration partners, including revenue from the sale 
of the product, associated reserves on revenue, and costs incurred for development and sales activities. For the periods covered in the 
financial statements presented, there have been no material changes to prior period estimates of revenues and expenses. 
We sold the right to receive certain royalty payments from net sales of Crysvita in certain territories to RPI Finance Trust, or RPI, an 
affiliate of Royalty Pharma, and to OCM LS23 Holdings LP, an investment vehicle for Ontario Municipal Employees Retirement System, or 
OMERS, as further described in “Liabilities for Sales of Future Royalties” below. We record the royalty revenue from the net sales of Crysvita 
in the applicable territories on a prospective basis as non-cash royalty revenue in the Consolidated Statements of Operations over the term 
of the applicable arrangement.
The terms of our collaboration and license agreements may contain multiple performance obligations, which may include licenses and 
research and development activities. We evaluate these agreements under ASC 606, Revenue from Contracts with Customers, or ASC 606, 
to determine the distinct performance obligations. We analogize to ASC 606 for the accounting for distinct performance obligations for which 
there is a customer relationship. Prior to recognizing revenue, we make estimates of the transaction price, including variable consideration 
that is subject to a constraint. Amounts of variable consideration are included in the transaction price to the extent that it is probable that a 
significant reversal in the amount of cumulative revenue recognized will not occur and when the uncertainty associated with the variable 
consideration is subsequently resolved. Total consideration may include nonrefundable upfront license fees, payments for research and 
development activities, reimbursement of certain third-party costs, payments based upon the achievement of specified milestones, and 
royalty payments based on product sales derived from the collaboration.
If there are multiple distinct performance obligations, we allocate the transaction price to each distinct performance obligation based 
on our relative standalone selling price. The standalone selling price is generally determined based on the prices charged to customers or 
using expected cost-plus margin. We estimate the efforts needed to complete the performance obligations and recognizes revenue by 
measuring the progress towards complete satisfaction of the performance obligations using input measures.
Product Sales
We sell our approved products through a limited number of distributors. Under ASC 606, revenue from product sales is recognized at 
the point in time when the delivery is made and when title and risk of loss transfers to these distributors. We also recognize revenue from 
sales of certain products on a “named patient” basis, which are allowed in certain countries prior to the commercial approval of the product. 
Prior to recognizing revenue, we make estimates of the transaction price, including any variable consideration that is subject to a constraint. 
Amounts of variable consideration are included in the transaction price to the extent that it is probable that a significant reversal in the 
amount of cumulative revenue recognized will not occur and when the uncertainty associated with the variable consideration is subsequently 
resolved. Product sales are recorded net of estimated government-mandated rebates and chargebacks, estimated product returns, and other 
deductions.
Provisions for returns and other adjustments are provided for in the period the related revenue is recorded, as estimated by 
management. These reserves are based on estimates of the amounts earned or to be claimed on the related sales and are reviewed 
periodically and adjusted as necessary. Our estimates of government mandated rebates, chargebacks, estimated product returns, and other 
deductions depends on the identification of key customer contract terms and conditions, as well as estimates of sales volumes to different 
classes of payors. If actual results vary, we may need to adjust these estimates, which could have a material effect on earnings in the period 
of the adjustment.
Inventory
We expense costs associated with the manufacture of our products prior to regulatory approval. Typically, capitalization of such costs 
begins when we have received the regulatory approval of the product. Prior to the FDA approval of our products, manufacturing and related 
costs were expensed; accordingly, these costs were not capitalized and as a result are not reflected in the costs of sales after the regulatory 
approval date. As of December 31, 2022, we do not hold a material amount of previously expensed inventory for our approved products.
73
 
Inventory that is manufactured after regulatory approval is valued at the lower of cost and net realizable value and cost is determined 
using the average-cost method. 
We periodically review our inventories for excess amounts or obsolescence and write down obsolete or otherwise unmarketable 
inventory to the estimated net realizable value.
Liabilities for Sales of Future Royalties
In December 2019, we entered into a Royalty Purchase Agreement with RPI. Pursuant to the agreement, RPI paid us $320.0 million in 
consideration for our right to receive royalty payments on the net sales of Crysvita in the EU, the United Kingdom, and Switzerland, effective 
January 1, 2020, under the terms of our Collaboration and License Agreement with KKC. The agreement with RPI will automatically 
terminate, and the payment of royalties to RPI will cease, in the event aggregate royalty payments received by RPI are equal to or greater 
than the capped amount of $608.0 million prior to December 31, 2030, or in the event aggregate royalty payments received by RPI are less 
than $608.0 million prior to December 31, 2030, when aggregate royalty payments received by RPI are equal to $800.0 million.
In July 2022, we entered into a Royalty Purchase Agreement with OMERS. Pursuant to the agreement, OMERS paid $500.0 million to 
us in consideration for the right to receive 30% of the future royalty payments due to us from KKC based on net sales of Crysvita in the U.S. 
and Canada under the terms of the KKC Collaboration Agreement. The calculation of royalty payments to OMERS will be based on net sales 
of Crysvita beginning in April 2023 and will expire upon the earlier of the date on which aggregate payments received by OMERS equals 
$725.0 million or the date the final royalty payment is made to us under the KKC Collaboration Agreement.
Proceeds from these transactions were recorded as liabilities (specifically, liabilities for sales of future royalties on the Consolidated 
Balance Sheets). We are amortizing $320.0 million and $500.0 million, net of transaction costs of $5.8 million and $9.1 million for RPI and 
OMERS, respectively, using the effective interest method over the estimated life of the applicable arrangement. In order to determine the 
amortization of the liabilities, we are required to estimate the total amount of future royalty payments to be received by us and paid to RPI 
and OMERS, subject to the capped amount, over the life of the arrangements. The excess of future estimated royalty payments (subject to 
the capped amount), in excess of the net proceeds received of $314.2 million and $491.0 million, respectively, is recorded as non-cash 
interest expense over the life of the arrangements. Consequently, we estimate an imputed interest on the unamortized portion of the liabilities 
and record interest expense relating to the transactions. We record the royalty revenue arising from the net sales of Crysvita in the applicable 
territories as non-cash royalty revenue in the Consolidated Statements of Operations over the term of the arrangements.
We periodically assess the expected royalty payments using a combination of historical results, internal projections and forecasts from 
external sources. To the extent such payments are greater or less than our initial estimates or the timing of such payments is materially 
different than its original estimates, we will prospectively adjust the amortization of the liabilities and the effective interest rate. Our effective 
annual interest rate was approximately 9.3% and 8.4%, for RPI and OMERS, respectively, as of December 31, 2022.
There are a number of factors that could materially affect the amount and timing of royalty payments from KKC in the applicable 
territories, most of which are not within our control. Such factors include, but are not limited to, the success of KKC’s sales and promotion of 
Crysvita, changing standards of care, delays or disruptions related to the COVID-19 pandemic, macroeconomic and inflationary pressures, 
the introduction of competing products, pricing for reimbursement in various territories, manufacturing or other delays, intellectual property 
matters, adverse events that result in governmental health authority imposed restrictions on the use of Crysvita, significant changes in foreign 
exchange rates as the royalty payments are made in U.S. dollars, or USD, while significant portions of the underlying sales of Crysvita are 
made in currencies other than USD, and other events or circumstances that could result in reduced royalty payments from sales of Crysvita, 
all of which would result in a reduction of non-cash royalty revenue and the non-cash interest expense over the life of the arrangement. 
Conversely, if sales of Crysvita in the relevant territories are more than expected, the non-cash royalty revenue and the non-cash interest 
expense recorded by us would be greater over the term of the arrangements.
74
 
 
Stock-Based Compensation 
Stock-based compensation costs related to equity awards granted to employees are measured at the date of grant based on the 
estimated fair value of the award, net of estimated forfeitures. We estimate the grant date fair value of options, and the resulting stock-based 
compensation expense, using the Black-Scholes option-pricing model. The grant date fair value of the stock-based awards is recognized on 
a straight-line basis over the requisite service period, which is generally the vesting period of the respective awards. We expect to continue to 
grant equity awards in the future, and to the extent that we do, our actual stock-based compensation expense will likely increase. The Black-
Scholes option-pricing model requires the use of certain subjective assumptions which determine the estimated fair value of stock-based 
awards. 
•
•
Expected Term — The expected term represents the period that the stock-based awards are expected to be outstanding and is 
determined using the simplified method (based on the midpoint between the vesting date and the end of the contractual term). 
Expected Volatility— The expected volatility is based on historical volatility over the look-back period corresponding to the 
expected term.
Strike price for options, including performance stock options, or PSOs, is equal to the closing market value of our common stock on the 
date of grant. 
In addition to the assumptions used in the Black-Scholes option-pricing model, we also estimate a forfeiture rate to calculate the stock-
based compensation for our awards. We will continue to use judgment in evaluating the expected volatility, expected terms, and forfeiture 
rates utilized for our stock-based compensation calculations on a prospective basis and will revise in subsequent periods, if actual forfeitures 
differ from those estimates. 
For restricted stock units, or RSUs, and performance stock units, or PSUs, the fair value is based on the market value of our common 
stock on the date of grant, except for certain PSUs with a market vesting condition, for which fair value is estimated using a Monte Carlo 
simulation model. Stock-based compensation expense for RSUs is recognized on a straight-line basis over the requisite service period. 
PSUs are subject to vest only if certain specified criteria are achieved and the employees’ continued service with the Company after 
achievement of the specified criteria. For certain PSUs, the number of PSUs that may vest are also subject to the achievement of certain 
specified criteria, including both performance conditions and market conditions. Compensation expense for PSUs is recognized only after the 
achievement of the specified criteria is considered probable and recognized on a straight-line basis between the grant date and the expected 
vest date, with a catch-up for previously unrecognized expense, if any, recognized in the period the achievement criteria is deemed probable.
For the years ended December 31, 2022, 2021, and 2020 stock-based compensation expense was $130.4 million, $105.0 million, and 
$85.7 million, respectively. As of December 31, 2022, we had $229.4 million of total unrecognized stock-based compensation costs, net of 
estimated forfeitures, which we expect to recognize over a weighted-average period of 2.28 years. 
Income Taxes
We use the liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based 
on the differences between the financial reporting and the tax bases of assets and liabilities and are measured using the enacted tax rates 
and laws that will be in effect when the differences are expected to reverse. We assess the likelihood that the resulting deferred tax assets 
will be realized. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be 
realized.
In conjunction with the Dimension acquisition in 2017, we recorded a deferred tax liability reflecting the tax impact of the difference 
between the book basis and tax basis of acquired IPR&D. Such deferred income tax liability was not used to offset deferred tax assets when 
analyzing our valuation allowance as the acquired IPR&D is considered to have an indefinite life until we complete or abandon development 
of the acquired IPR&D.
We recognize benefits of uncertain tax positions if it is more likely than not that such positions will be sustained upon examination 
based solely on their technical merits, as the largest amount of benefit that is more likely than not to be realized upon the ultimate settlement. 
Our policy is to recognize interest and penalties related to the underpayment of income taxes as a component of income tax expense or 
benefit. To date, there have been no interest or penalties charged in relation to the unrecognized tax benefits.
As of December 31, 2022, our total gross deferred tax assets were $900.7 million. Due to our lack of earnings history and uncertainties 
surrounding our ability to generate future taxable income, the net deferred tax assets have been fully offset by a valuation allowance. The 
deferred tax assets were primarily comprised of federal and state tax net operating losses and tax credit carryforwards. Utilization of the net 
operating loss and tax credit carryforwards may be subject to an annual limitation due to 
75
 
historical or future ownership percentage change rules provided by the Internal Revenue Code of 1986, and similar state provisions. The 
annual limitation may result in the expiration of certain net operating loss and tax credit carryforwards before their utilization.
Results of Operations 
Comparison of Years Ended December 31, 2022 and 2021
Revenues (dollars in thousands)
Collaboration and license revenue:
Crysvita collaboration revenue in profit-share 
    territory
Crysvita royalty revenue in European territory
Daiichi Sankyo
Total collaboration and license revenue
Product sales:
Crysvita
Mepsevii
Dojolvi
Total product sales
Crysvita non-cash collaboration royalty revenue
Total revenues
Year Ended December 31,
2022
2021
Dollar
Change
Percent
Change
$
$
215,024  
—  
7,686  
222,710  
42,678  
20,637  
55,612  
118,927  
21,692  
363,329  
  $
  $
171,198     $
244      
84,996      
256,438      
21,422      
16,035      
39,560      
77,017      
17,951      
351,406     $
43,826    
(244 )  
(77,310 )  
(33,728 )  
26%
(100%)
(91%)
(13%)
21,256    
4,602    
16,052    
41,910  
3,741    
11,923  
99%
29%
41%
54%
21%
3%
For the year ended December 31, 2022, our share of Crysvita collaboration revenue in the profit-share territory increased by $43.8 
million, as compared to the same period in 2021. The increase was primarily due to continued increase in demand for Crysvita due to an 
increase in the number of patients on therapy.
For the year ended December 31, 2022, the collaboration and license revenue from our license agreement with Daiichi Sankyo 
decreased by $77.3 million, as compared to the same period in 2021. The decrease was due to the completion of the technology transfer as 
of March 31, 2022.
The increase in product sales of $41.9 million for the year ended December 31, 2022, compared to the same period in 2021 was 
primarily due to an increase in demand for Crysvita in Latin America due to an increase in the number of patients on therapy, continued 
momentum from the commercial launch of Dojolvi in the U.S., continued increase in demand for our other approved products, and an 
increase in sales of our products under our named patient program in certain countries. 
The increase in Crysvita non-cash collaboration royalty revenue of $3.7 million for the year ended December 31, 2022, compared to 
the same period in 2021, was primarily due to the launch progress by our collaboration partner in European countries and an increase in the 
number of patients on therapy.
Cost of Sales (dollars in thousands) 
Cost of sales
Year Ended December 31,
2022
2021
Dollar
Change
$
28,320  
  $
16,008     $
12,312    
Percent
Change
77%
Cost of sales related to our approved products increased by $12.3 million for the year ended December 31, 2022, compared to the 
same period in 2021. The increase was due to increased demand for our approved products and amortization of the intangible asset for 
Evkeeza from our license agreement with Regeneron, which began in January 2022.
Research and Development Expenses (dollars in thousands)
Research and development expenses include internal and external costs incurred for research and development of our programs and 
program candidates and expenses related to certain technology that we acquire or license through business development transactions. 
These expenses consist primarily of clinical studies performed by contract research organizations, manufacturing of drug substance and drug 
product performed by contract manufacturing organizations, materials and supplies, fees from collaborative and other arrangements 
including milestones, licenses and other fees, personnel costs including salaries, benefits and stock-based compensation, and overhead 
allocations consisting of various support and infrastructure costs.
76
 
 
   
   
 
   
   
   
 
 
 
 
   
 
   
 
 
   
 
   
 
   
 
 
 
 
   
   
 
 
 
   
 
   
 
   
 
   
 
 
   
 
 
   
   
 
   
   
   
Commercial programs include costs for disease monitoring programs and certain regulatory and medical affairs support activities for 
programs after commercial approval. Clinical programs include study conduct and manufacturing costs related to clinical program 
candidates. Translational research includes costs for preclinical study work and costs related to preclinical programs prior to IND filing. 
Upfront license, acquisition, and milestone fees include any significant expenses related to strategic licensing agreements and acquisitions. 
Infrastructure costs include direct costs related to laboratory, IT, and equipment depreciation costs, and overhead allocations for human 
resources, IT, and other allocable costs.
The following table provides a breakout of our research and development expenses by major program type and business activities:
Commercial programs
Clinical programs:
Gene therapy programs
Nucleic acid and other biologic programs
Translational research
Upfront license, acquisition, and milestone fees
Infrastructure
Stock-based compensation
Other research and development
Total research and development expenses
$
Year Ended December 31,
2022
2021
Dollar
Change
$
75,683     $
52,015     $
23,668    
Percent
Change
46%
153,754      
97,268  
81,431      
75,033      
71,657  
74,464  
76,499  
705,789  
  $
108,217      
50,681  
62,207      
50,000      
59,294  
59,097  
55,642  
497,153  
  $
45,537    
46,587  
19,224  
25,033  
12,363    
15,367  
20,857  
208,636  
42%
92%
31%
50%
21%
26%
37%
42%
Total research and development expenses increased $208.6 million for the year ended December 31, 2022 compared to the same 
period in 2021. The change in research and development expenses was due to: 
•
•
•
•
•
•
•
•
for commercial programs, an increase of $23.7 million, primarily related to the cost sharing for ongoing clinical trials with 
Regeneron for Evkeeza, new Evkeeza regulatory and medical affairs support activities, and increased R&D personnel allocations 
to commercial programs;
for gene therapy programs, an increase of $45.5 million, primarily related to increases in clinical manufacturing and clinical trial 
expenses for our Phase 3 programs for DTX401 and DTX301 and development costs related to the UX111 program from Abeona 
Therapeutics;
for nucleic acid and other biologic programs, an increase of $46.6 million, primarily related to the addition of clinical trial expenses 
related to UX053, following its IND approval in March 2021; increased clinical trial and manufacturing expenses related to the 
continued progress of the UX143 program in collaboration with Mereo; and clinical and other development expenses related to the 
continued progress of the GTX-102 program;
for translational research, an increase of $19.2 million, primarily related to IND-enabling development costs for multiple research 
projects;
for upfront license, acquisition, and milestone fees, an increase of $25.0 million, primarily due to $75.0 million recognized from the 
GeneTx acquisition for the year ended December 31, 2022, as compared $50.0 million recognized from the upfront fee for the 
Mereo license for the year ended December 31, 2021;
for infrastructure, an increase of $12.4 million, primarily related to increased expenses for support of our clinical and research 
program pipeline, expansion of laboratory space, depreciation of laboratory-related leasehold improvements and equipment, and 
IT-related expenses; 
for stock-based compensation, an increase of $15.4 million, primarily related to the increased employee headcount; and
for other research and development expenses, an increase of $20.9 million, primarily related to increased staffing to support 
internal manufacturing, increased travel, and increased administrative and general support.
We expect our annual research and development expenses to moderate in the future as we advance our product candidates through 
clinical development. The timing and amount of expenses incurred will depend largely upon the outcomes of current or future clinical studies 
for our product candidates as well as the related regulatory requirements, manufacturing costs, and any costs associated with the 
advancement of our preclinical programs.
77
 
  
 
   
   
 
   
   
   
     
     
     
 
 
 
   
   
 
 
 
 
 
 
   
   
 
   
   
 
 
   
   
 
 
Selling, General and Administrative Expenses (dollars in thousands)
Selling, general and administrative
$
278,139  
  $
219,982     $
58,157    
Year Ended December 31,
2022
2021
Dollar
Change
Percent
Change
26%
Selling, general and administrative expenses increased $58.2 million for the year ended December 31, 2022, compared to the same 
period in 2021. The increases in selling, general and administrative expenses were primarily due to increases in personnel costs resulting 
from an increase in the number of employees to support our commercial activities, commercialization costs, and professional services costs.
We expect selling, general and administrative expenses to moderate in the future as we continue to support our approved products 
and multiple clinical-stage product candidates, with expected decreases in commercial activities due to transition of Crysvita to our partner in 
the profit-share territory.
Interest Income (dollars in thousands) 
Interest income
Year Ended December 31,
2022
2021
Dollar
Change
$
11,074  
  $
1,928  
  $
9,146    
Percent
Change
474%
Interest income increased $9.1 million for the year ended December 31, 2022 compared to the same period in 2021, primarily due to 
increases in interest rates and higher average marketable debt securities balances.
Change in Fair Value of Equity Investments (dollars in thousands)
Change in fair value of equity investments
$
(19,299 )   $
(42,063 )   $
22,764  
Year Ended December 31,
2022
2021
Dollar
Change
Percent
Change
(54%)
For the year ended December 31, 2022, we recorded a net decrease in the fair value of our equity investments of $19.3 million. The 
fair value of our investments in Arcturus and Solid common stock decreased by $8.4 million and $10.9 million, respectively, for the period. 
The change in fair value of Arcturus included a realized gain on the sale of all our remaining shares of common stock for net proceeds of 
$10.1 million.
For the year ended December 31, 2021, we recorded a net decrease in the fair value of our equity investments of $42.1 million. The 
fair value of our investment in Solid common stock decreased by $45.6 million for the period. This was offset by an increase in the fair value 
of our investment in Arcturus common stock of $2.9 million for the period, which included a realized gain on the sale of a portion of Arcturus 
common stock for net proceeds of $79.8 million, as well as an increase of $0.6 million related to the conversion of the convertible note in a 
private pharmaceutical company to its preferred shares, resulting in a net decrease in the fair value of equity investments of $42.1 million.
Given the historic volatility of the publicly traded stock price of Solid, the fair value adjustments of our equity investments may be 
subject to wide fluctuations which may have a significant impact on our earnings in future periods. 
Non-cash Interest Expense on Liabilities for Sales of Future Royalties (dollars in thousands)
Non-cash interest expense on liabilities for
    sales of future royalties
Year Ended December 31,
2022
2021
Dollar
Change
Percent
Change
$
43,015  
$
29,422  
$
13,593  
46%
Our non-cash interest expense on liabilities for sales of future royalties increased by $13.6 million for the year ended December 31, 
2022, compared to the same period in 2021. This was primarily due to the partial sale of North American Crysvita royalties to OMERS in July 
2022, which resulted in an increase in liabilities for sales of future royalties by $491.0 million and higher interest expense, partially offset by 
an increase of $6.7 million in the capitalization of interest related to the construction-in-progress for the gene therapy manufacturing plant, 
compared to the same period in 2021. To the extent royalty payments are greater or less than our initial estimates or the timing of such 
payments is materially different than our original estimates, we will prospectively adjust the effective interest rate.
78
 
  
 
   
   
 
   
   
   
 
 
  
 
   
   
 
   
   
   
 
 
   
   
 
   
   
   
 
 
   
   
 
   
   
   
 
 
 
Other Expense (dollars in thousands)
Other expense
Year Ended December 31,
2022
2021
Dollar
Change
$
(1,566 )   $
(1,687 )   $
121    
Percent
Change
(7%)
Other expense decreased $0.1 million for the year ended December 31, 2022, compared to the same period in 2021. These changes 
were primarily due to fluctuations in foreign exchange rates.
Provision for income taxes
Provision for income taxes
$
(5,696 )   $
(1,044 )   $
(4,652 )  
Year Ended December 31,
2022
2021
Dollar
Change
Percent
Change
446%
The provision for incomes taxes increased by $4.7 million for the year ended December 31, 2022, compared to the same period in 
2021. Beginning in 2022, the Tax Cuts and Jobs Act of 2017 eliminated the ability to deduct research and development expenditures for tax 
purposes in the period the expenses were incurred and instead requires all U.S. and foreign research and development expenditures to be 
amortized over five and fifteen tax years, respectively. Due to this required capitalization of research and development expenditures and the 
significant taxable income generated as a result of our sale of royalties in July 2022, we have recorded a one-time discrete state tax expense 
of $6.1 million for the year ended December 31, 2022. The discrete tax expense is for state taxes we anticipate paying as a result of statutory 
limitations on our ability to offset expected taxable income with net operating loss carry forwards in certain states. We realized no benefit for 
current year losses due to a full valuation allowance against the U.S. net deferred tax assets.
Liquidity and Capital Resources 
To date, we have funded our operations primarily from the sale of our equity securities, revenue from our commercial products, the 
sale of certain future royalties, and strategic collaboration arrangements. 
As of December 31, 2022, we had $896.7 million in available cash, cash equivalents, and marketable debt securities. We believe that 
our existing capital resources will be sufficient to fund our projected operating requirements for at least the next twelve months. Our cash, 
cash equivalents, and marketable debt securities are held in a variety of deposit accounts, interest-bearing accounts, corporate bond 
securities, commercial paper, U.S government securities, asset-backed securities, debt securities in government-sponsored entities, and 
money market funds. Cash in excess of immediate requirements is invested with a view toward liquidity and capital preservation, and we 
seek to minimize the potential effects of concentration and credit risk.
In May 2021, we entered into an Open Market Sale Agreement with Jefferies LLC, or Jefferies, pursuant to which we may offer and sell 
shares of our common stock having an aggregate offering proceeds up to $350.0 million, from time to time, in at-the-market, or ATM, 
offerings through Jefferies. As of December 31, 2022, net proceeds from shares sold under the arrangement were approximately $78.9 
million. No shares were sold under this arrangement for the year ended December 31, 2022. 
In July 2022, we received net proceeds of $491.0 million from the sale of certain future royalties to OMERS. 
For the year ended December 31, 2022, we sold all of our remaining 500,000 shares of Arcturus common stock for net proceeds of 
$10.1 million.
The following table summarizes our cash flows for the periods indicated (in thousands):
Cash used in operating activities
Cash used in investing activities
Cash provided by financing activities
Effect of exchange rate changes on cash
Net (decrease) increase in cash, cash equivalents, and 
   restricted cash
  $
  $
79
Year Ended December 31,
2021
(338,695 )   $
(195,372 )    
118,552      
(1,194 )    
2022
(380,465 )   $
(291,652 )    
501,208      
(1,075 )    
2020
(132,220 )
(179,121 )
600,272  
1,119  
(171,984 )   $
(416,709 )   $
290,050  
 
  
 
   
   
 
   
   
   
 
 
   
   
 
   
   
   
 
 
 
 
 
 
   
   
 
   
   
   
 
Cash Used in Operating Activities 
Our primary use of cash is to fund operating expenses, which consist primarily of research and development and commercial 
expenditures. Due to our significant research and development expenditures, we have generated significant operating losses since our 
inception. Cash used to fund operating expenses is affected by the timing of when we pay these expenses, as reflected in the change in our 
outstanding accounts payable and accrued expenses.
Cash used in operating activities for the year ended December 31, 2022 was $380.5 million and primarily reflected a net loss of $707.4 
million and $21.7 million for non-cash collaboration royalty revenues related to the sale of future royalties to RPI, offset by non-cash charges 
of $130.4 million for stock-based compensation, $75.0 million for acquired in-process research and development expense, $2.7 million for the 
amortization of the premium paid on marketable debt securities, $18.2 million for depreciation and amortization, $19.3 million primarily for the 
net change in fair value of equity investments from Arcturus and Solid, and $43.0 million for non-cash interest expense incurred on the 
liabilities for sales of future royalties to RPI and OMERS, net of capitalized interest. Cash used in operating activities also reflected a $12.1 
million decrease due to an increase in accounts receivable primarily related to an increase in sales of our approved products, a $9.7 million 
decrease due to an increase in inventory for Mepsevii and Dojolvi, a decrease of $7.6 million in contract liabilities, net, related to the revenue 
recognized from the license agreements with Daiichi Sankyo, and a decrease of $1.6 million due to a decrease in deferred tax liabilities, 
related to certain changes in tax law requiring capitalization of research and development expenses combined with taxable income generated 
by our sale of future royalties to OMERS. These decreases were offset by a $3.8 million increase in prepaid expenses and other assets 
primarily due to a decrease in prepaid fixed assets, and a $87.4 million increase in accounts payable, accrued liabilities, and other liabilities 
primarily due to timing of payments and receipt of invoices, as well as an increase in manufacturing accruals related to manufacturing and 
clinical expenses, an increase in accrued bonus due to an increase in headcount, and an increase in accrued development costs owed to a 
collaboration partner. 
Cash used in operating activities for the year ended December 31, 2021 was $338.7 million and primarily reflected a net loss of $454.0 
million and $18.0 million for non-cash collaboration royalty revenues related to the sale of future royalties to RPI, offset by non-cash charges 
of $105.0 million for stock-based compensation, $13.2 million for depreciation and amortization, $6.6 million for the amortization of the 
premium paid on marketable debt securities, $42.1 million primarily for the net change in fair value of equity investments from Arcturus and 
Solid, and $29.4 million for non-cash interest expense incurred on the liability for sales of future royalties to RPI, net of capitalized interest. 
Cash used in operating activities also reflected a $5.4 million decrease due to an increase in accounts receivable primarily related to higher 
revenues, a $3.1 million decrease due to an increase in inventory for Dojolvi, a $29.5 million decrease due to an increase in prepaid 
expenses and other assets primarily due to an increase in prepaid manufacturing expenses, prepaid clinical expenses, and prepaid fixed 
assets as well as an increase in receivables from our collaboration partner, and a decrease of $57.5 million in contract liabilities, net, related 
to the revenue recognized from the license agreements with Daiichi Sankyo. These decreases were offset by a $32.3 million increase in 
accounts payable, accrued liabilities, and other liabilities primarily due to an increase in accruals related to manufacturing expenses, 
compensation related expenses, collaboration expenses and income taxes payable.
Cash Used in Investing Activities 
Cash used in investing activities for the year ended December 31, 2022 was $291.7 million and was primarily related to purchases of 
property, plant, and equipment of $116.1 million, primarily related to the construction of our gene therapy manufacturing facility, the 
acquisition of GeneTx for $75.0 million, net of cash acquired, purchases of marketable debt securities of $614.7 million, and the payment to 
Regeneron for intangible assets of $30.0 million offset by the sale of marketable debt securities of $84.3 million, proceeds from the sale of 
Arcturus common stock of $10.1 million, and proceeds from maturities of marketable debt securities of $450.7 million.
Cash used in investing activities for the year ended December 31, 2021 was $195.4 million and was primarily related to purchases of 
property, plant, and equipment of $73.1 million and purchases of marketable debt securities of $1,012.2 million, offset by the sale of 
marketable debt securities of $92.9 million, proceeds from the sale of Arcturus common stock of $79.8 million, and proceeds from maturities 
of marketable debt securities of $718.1 million.
Cash Flows Provided by Financing Activities 
Cash provided by financing activities for the year ended December 31, 2022 was $501.2 million and was comprised of $491.0 million 
in net proceeds from the partial sale of future North America Crysvita royalties to OMERS and $10.8 million in net proceeds from the 
issuance of common stock upon the exercise of stock options, net of taxes withheld from the vesting of restricted stock units.
80
 
Cash provided by financing activities for the year ended December 31, 2021 was $118.6 million and was comprised of $78.9 million in 
net proceeds from the issuance of common stock from our ATM offering and $40.1 million in net proceeds from the issuance of common 
stock upon the exercise of stock options, net of taxes withheld from the vesting of restricted stock units.
Funding Requirements 
We anticipate that, excluding non-recurring items, we will continue to generate annual losses for the foreseeable future as we continue 
the development of, and seek regulatory approvals for, our product candidates, and continue with commercialization of approved products. 
We will require additional capital to fund our operations, to complete our ongoing and planned clinical studies, to commercialize our products, 
to continue investing in early-stage research capabilities to promote our pipeline growth, to continue to acquire or invest in businesses or 
products that complement or expand our business, including future milestone payments thereunder, and to further develop our general 
infrastructure, including construction of our GMP gene therapy manufacturing facility, and such funding may not be available to us on 
acceptable terms or at all.
If we are unable to raise additional capital in sufficient amounts or on terms acceptable to us, we may be required to delay, limit, 
reduce the scope of, or terminate one or more of our clinical studies, research and development programs, future commercialization efforts, 
or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.
Our future funding requirements will depend on many factors, including the following:
•
•
•
•
•
•
•
the scope, rate of progress, results and cost of our clinical studies, nonclinical testing, and other related activities; 
the cost of manufacturing clinical supplies, and establishing commercial supplies, of our product candidates, products that we 
have begun to commercialize, and any products that we may develop in the future, including the construction of our own GMP 
gene therapy manufacturing plant; 
the number and characteristics of product candidates that we pursue; 
the cost, timing, and outcomes of regulatory approvals; 
the cost and timing of establishing our commercial infrastructure, and distribution capabilities; 
the magnitude and extent to which the COVID-19 pandemic impacts our business operations and operating results, as described 
in “Part I, Item IA. Risk Factors " and 
the terms and timing of any collaborative, licensing, marketing, distribution, acquisition and other arrangements that we may 
establish, including any required upfront milestone, royalty, reimbursements or other payments thereunder. 
We expect to satisfy future cash needs through existing capital balances, revenue from our commercial products, and a combination of 
public or private equity offerings, debt financings, collaborations, strategic alliances, licensing arrangements, and other marketing and 
distribution arrangements. Please see “Risk Factors—Risks Related to Our Financial Condition and Capital Requirements.” 
Contractual Obligations and Commitments
Material contractual obligations arising in the normal course of business primarily consist of operating and finance leases, and 
manufacturing and service contract obligations. See Note 9 to the Consolidated Financial Statements for amounts outstanding for operating 
and finance leases on December 31, 2022.
Manufacturing and service contract obligations primarily relate to manufacturing of inventory for our approved products, the majority of 
which are due in the next 12 months. See Note 15 to the Consolidated Financial Statements for these contractual obligations.
The terms of certain of our licenses, royalties, development and collaboration agreements, as well as other research and development 
activities, require us to pay potential future milestone payments based on product development success. The amount and timing of such 
obligations are unknown or uncertain. These potential obligations are further described in Note 8 to the Consolidated Financial Statements. 
Recent Accounting Pronouncements 
None.
81
 
 
 
Item 7A. Quantitative and Qualitative Disclosures About Market Risk 
Interest Rate Risk
Our exposure to market risk for changes in interest rates relates primarily to interest earned on our cash equivalents and marketable 
debt securities. The primary objective of our investment activities is to preserve our capital to fund operations. A secondary objective is to 
maximize income from our investments without assuming significant risk. Our investment policy provides for investments in low-risk, 
investment-grade debt instruments. As of December 31, 2022, we had cash, cash equivalents, and marketable debt securities totaling 
$896.7 million, which included bank deposits, money market funds, U.S. government treasury and agency securities, and investment-grade 
corporate bond securities which are subject to default, changes in credit rating, and changes in market value. The securities in our 
investment portfolio are classified as available for sale and are subject to interest rate risk and will decrease in value if market interest rates 
increase. A hypothetical 100 basis point change in interest rates during any of the periods presented would not have had a material impact 
on the fair market value of our cash equivalents and marketable debt securities as of December 31, 2022. To date, we have not experienced 
a loss of principal on any of our investments and as of December 31, 2022, we did not record any allowance for credit loss from our 
investments.
Foreign Currency Risk
We face foreign exchange risk as a result of entering into transactions denominated in currencies other than U.S. dollars. Due to the 
uncertain timing of expected payments in foreign currencies, we do not utilize any forward exchange contracts. All foreign transactions settle 
on the applicable spot exchange basis at the time such payments are made. Volatile market conditions arising from the COVID-19 pandemic, 
the macro-economic environment, inflation, or global political instability may result in significant changes in exchange rates, and in particular 
a weakening of foreign currencies relative to the U.S. dollar may negatively affect our revenue and operating income as expressed in U.S. 
dollars. An adverse movement in foreign exchange rates could have a material effect on payments made to foreign suppliers and payments 
related to license agreements. For the year ended December 31, 2022, a majority of our revenue, expenses, and capital expenditures were 
denominated in U.S. dollars. A hypothetical 10% change in foreign exchange rates during any of the periods presented would not have had a 
material impact on our Consolidated Financial Statements.
Item 8. Financial Statements and Supplementary Data 
Our financial statements are annexed to this Annual Report beginning on page F-1 and are incorporated by reference into this Item 8. 
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure 
None. 
82
 
 
Item 9A. Controls and Procedures 
Evaluation of Disclosure Controls and Procedures 
Management carried out an evaluation, under the supervision and with the participation of our Principal Executive Officer and Principal 
Financial Officer, of the effectiveness of our “disclosure controls and procedures” as of the end of the period covered by this Annual Report, 
pursuant to Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, or the Exchange Act. Based on this evaluation, our 
Principal Executive Officer and Principal Financial Officer concluded that our disclosure controls and procedures were effective and designed 
to provide reasonable assurance that the information required to be disclosed is recorded, processed, summarized, and reported within the 
time periods specified in the SEC rules and forms as of December 31, 2022. For the purpose of this review, disclosure controls and 
procedures means controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or 
submit is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. These disclosure 
controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by 
us in the reports that we file or submit is accumulated and communicated to management, including our Principal Executive Officer and 
Principal Financial Officer, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure 
controls and procedures, our management recognizes that any controls and procedures, no matter how well designed and operated, can 
provide only reasonable assurance of achieving the desired control objectives, and our management necessarily applies its judgment in 
evaluating the cost-benefit relationship of possible controls and procedures. 
Management’s Annual Report on Internal Control Over Financial Reporting
Management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-
15(f) and 15d-15(f) of the Exchange Act. Our management used the Committee of Sponsoring Organizations of the Treadway Commission 
Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 
framework), or the COSO framework, to evaluate the effectiveness of internal control over financial reporting. Management believes that the 
COSO framework is a suitable framework for its evaluation of financial reporting because it is free from bias, permits reasonably consistent 
qualitative and quantitative measurements of our internal control over financial reporting, is sufficiently complete so that those relevant 
factors that would alter a conclusion about the effectiveness of our internal control over financial reporting are not omitted and is relevant to 
an evaluation of internal control over financial reporting.
Management has assessed the effectiveness of our internal control over financial reporting as of December 31, 2022 and has 
concluded that as of such date, our internal control over financial reporting was effective. 
Our independent registered public accounting firm, Ernst & Young LLP, has audited the financial statements included in this Annual 
Report and has issued a report on the effectiveness of our internal control over financial reporting. The report of Ernst & Young LLP is 
included below.
Changes in Internal Control over Financial Reporting 
There have been no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the 
Exchange Act) during our fourth quarter ended December 31, 2022, that have materially affected, or are reasonably likely to materially affect 
our internal control over financial reporting.
To the Stockholders and the Board of Directors of Ultragenyx Pharmaceutical Inc.
Report of Independent Registered Public Accounting Firm
Opinion on Internal Control Over Financial Reporting 
We have audited Ultragenyx Pharmaceutical Inc.’s internal control over financial reporting as of December 31, 2022, based on criteria 
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission 
(2013 framework) (the COSO criteria). In our opinion, Ultragenyx Pharmaceutical Inc. (the Company) maintained, in all material respects, 
effective internal control over financial reporting as of December 31, 2022, based on the COSO criteria.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), 
the consolidated balance sheets of Ultragenyx Pharmaceutical Inc. as of December 31, 2022 and 2021, the related consolidated statements 
of operations, comprehensive loss, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2022, 
and the related notes, and our report dated February 16, 2023 expressed an unqualified opinion thereon.
83
 
 
 
Basis for Opinion 
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of 
the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control 
over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our 
audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in 
accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and 
the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit 
to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. 
Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness 
exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such 
other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control Over Financial Reporting 
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of 
financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of 
records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide 
reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally 
accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of 
management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized 
acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections 
of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in 
conditions, or that the degree of compliance with the policies or procedures may deteriorate.
/s/ Ernst & Young LLP
San Mateo, California
February 16, 2023
Item 9B. Other Information 
None. 
Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections
Not applicable.
84
 
 
 
 
 
 
Item 10. Directors, Executive Officers and Corporate Governance 
PART III
Except as set forth below, the information required by this Item is incorporated herein by reference to information in the proxy 
statement for our 2023 Annual Meeting of Stockholders, which we will file with the SEC within 120 days of the end of the fiscal year to which 
this Annual Report relates, or the “2023 Proxy Statement”, including under the headings “Nominees and Incumbent Directors,” “Executive 
Officers,” ““Board of Directors and Committees,” and, as applicable, “Delinquent Section 16(a) Beneficial Ownership Reports.” We have 
adopted a code of ethics that applies to all of our directors, officers and employees, including our principal executive, principal financial and 
principal accounting officers, or persons performing similar functions, or Code of Ethics. Our Code of Ethics is posted on our website located 
at https://ir.ultragenyx.com/ under “Corporate Governance”. We intend to disclose future amendments to certain provisions of the Code of 
Ethics, and waivers of the Code of Ethics granted to executive officers and directors, on the website within four business days following the 
date of the amendment or waiver.
Item 11. Executive Compensation 
The information required by this Item is incorporated herein by reference to information in the 2023 Proxy Statement, including under 
the headings “Executive Compensation,” “Director Compensation,” and “Board of Directors and Committees” 
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters 
The information required by this Item is incorporated herein by reference to information in the 2023 Proxy Statement, including under 
the headings “Security Ownership of Certain Beneficial Owners and Management” and “Equity Compensation Plan Information.”
Item 13. Certain Relationships and Related Transactions, and Director Independence 
The information required by this Item is incorporated herein by reference to information in the 2023 Proxy Statement, including under 
the headings “Certain Relationships and Related-Person Transactions,” “Corporate Governance,” and “Board of Directors and Committees.” 
Item 14. Principal Accountant Fees and Services 
The information required by this Item is incorporated herein by reference to information in the 2023 Proxy Statement, including under 
the heading “Proposal No. 2—Ratification of the Selection of Independent Registered Public Accounting Firm.” 
85
 
 
Item 15. Exhibits and Financial Statement Schedules 
(a)  The following documents are filed as part of this Annual Report. 
(1)  Consolidated Financial Statements 
PART IV 
     Consolidated Financial Statements—See Index to Consolidated Financial Statements at page F-1 of this Annual Report. 
(2)  Consolidated Financial Statement Schedules 
     Consolidated Financial Statement schedules have been omitted in this Annual Report because they are not applicable, not 
required under the instructions, or the information requested is set forth in the Consolidated Financial Statements or related 
notes thereto.
(b)  Exhibits 
Exhibit Description
Form  
Date
Number
Incorporated by Reference
Filed
Herewith
Exhibit
Number
3.1
3.2
4.1
4.2
4.3
  Amended and Restated Certificate of Incorporation
  Amended and Restated Bylaws
  Form of Common Stock Certificate
  Form of Indenture
  Description of Common Stock
8-K
8-K
S-1
2/5/2014
2/5/2014
11/8/2013
  S-3 ASR  
2/12/2021
10-K  
2/14/2020
3.1
3.2
4.2
4.2
4.3
1.1
10.1
  Open Market Sales Agreement, dated May 7, 2021, between 
8-K
5/7/2021
Ultragenyx Pharmaceutical Inc. and Jefferies LLC
10.2*
  Collaboration and License Agreement, effective as of August 
  S-1/A  
12/23/2013
10.1
29, 2013, between Ultragenyx Pharmaceutical Inc. and 
Kyowa Hakko Kirin Co., Ltd.
10.3
  Amendment No. 1 to Collaboration and License Agreement, 
10-Q  
11/10/2015
10.2
effective as of August 24, 2015, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Hakko Kirin Co., Ltd.
10.4
  Amendment No. 2 to Collaboration and License Agreement, 
10-K  
2/21/2018
effective as of November 28, 2016, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Hakko Kirin Co., Ltd.
10.5*
  Amendment No. 3 to Collaboration and License Agreement, 
10-K  
2/21/2018
effective September 29, 2017, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Hakko Kirin Co., Ltd.
10.6*
  Amendment No. 4 to Collaboration and License Agreement, 
10-K  
2/21/2018
effective as of January 29, 2018, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Hakko Kirin Co., Ltd.
10.7*
  Amendment No. 5 to Collaboration and License Agreement, 
10-Q  
8/3/2018
effective as of April 30, 2018, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Hakko Kirin Co., Ltd.
10.8*
  Amendment No. 6 to Collaboration and License Agreement, 
10-Q  
5/7/2019
effective as of February 1, 2019, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Hakko Kirin Co., Ltd.
86
10.3
10.4
10.5
10.1
10.2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.9*
  Amendment No. 7 to Collaboration and License Agreement, 
10-Q  
5/7/2019
effective as of December 5, 2018, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Hakko Kirin Co., Ltd.
10.10*
  Amendment No. 8 to Collaboration and License Agreement, 
10-Q  
8/2/2019
10.3
10.1
effective as of July 4, 2019, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Kirin Co., Ltd. (formerly, 
Kyowa Hakko Kirin Co., Ltd.)
10.11*
  Amendment No. 9 to Collaboration and License Agreement, 
10-K  
2/14/2020
10.10
effective December 23, 2019, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Kirin Co., Ltd.
10.12*
  Amendment No. 10 to Collaboration and License Agreement, 
10-Q  
5/7/2020
10.2
effective as of April 1, 2020, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Kirin Co., Ltd.
10.13*
  Amendment No. 11 to Collaboration and License Agreement, 
10-K  
2/16/2022
10.13
effective as of December 17, 2021 between Ultragenyx 
Pharmaceutical Inc. and Kyowa Kirin Co., Ltd.
10.14*
  Amendment No. 12 to Collaboration and License Agreement, 
10-Q  
11/3/2022
10.1
10.15*
10.16*
10.17*
effective as of September 29, 2022, between Ultragenyx 
Pharmaceutical Inc. and Kyowa Kirin Co., Ltd.
  License Agreement, dated as of September 20, 2012, 
between Ultragenyx Pharmaceutical Inc. and Baylor 
Research Institute
  Amendment to the License Agreement, dated as of March 22, 
2013, between Ultragenyx Pharmaceutical Inc. and Baylor 
Research Institute
10-K  
2/12/2021
10.12
10-K  
2/12/2021
10.13
  Exclusive License Agreement, dated as of November 22, 
2010, between Ultragenyx Pharmaceutical Inc. and Saint 
Louis University
  S-1/A  
12/23/2013
10.8
10.18*
  License Agreement, dated October 30, 2013, between 
10-K  
2/21/2018
10.13
Dimension Therapeutics, Inc. and REGENXBIO Inc. (f/k/a 
ReGenX Biosciences, LLC), as amended
10.19*
  Option and License Agreement, dated March 10, 2015, 
10-K  
2/21/2018
between Dimension Therapeutics, Inc. and REGENXBIO Inc.
10.20*
  First Amendment to Option and License Agreement, dated 
10-Q  
5/7/2019
10.14
10.1
March 18, 2019, between REGENXBIO, Inc. and Ultragenyx 
Pharmaceutical Inc. (as assignee of Dimension Therapeutics, 
Inc.)
10.21*
  Second Amendment to Option and License Agreement, dated 
10-K  
2/16/2022
10.20
December 17, 2021, between REGENXBIO, Inc. and 
Ultragenyx Pharmaceutical Inc.
10.22*
  Research, Collaboration and License Agreement, dated as of 
May 5, 2016, between Dimension Therapeutics, Inc. and The 
Trustees of the University of Pennsylvania, as amended
10-K  
2/21/2018
10.16
10.23*
  3rd Amendment to Research, Collaboration and License 
10-K  
2/21/2018
10.17
Agreement, entered into as of October 30, 2017, between 
Dimension Therapeutics, Inc. and The Trustees of the 
University of Pennsylvania
87
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.24*
  Commercial Supply and Services Agreement – Drug 
10-K  
2/21/2018
10.18
Substance, effective December 7, 2017, between Ultragenyx 
Europe GmbH and Rentschler Biopharma SE
10.25*
  Commercial Master Service Agreement – Drug Product, 
effective February 22, 2021, between Ultragenyx 
Pharmaceutical Inc. and BSP Pharmaceuticals S.p.A
10.26
  Supply Agreement, dated as of November 19, 2012, between 
Ultragenyx Pharmaceutical Inc. and CREMER OLEO GmbH 
& Co KG
10-K  
2/21/2018
10.11
X
10.27*
  Master Services Agreement, dated April 8, 2019, between 
10-K  
2/12/2021
10.24
Ultragenyx Pharmaceutical Inc. and Aenova Haupt Pharma 
Wolfratshausen GmbH
10.28*
10.29*
  Royalty Purchase Agreement, dated as of December 17, 
2019, between Ultragenyx Pharmaceutical Inc. and RPI 
Finance Trust
  Royalty Purchase Agreement, dated as of July 14, 2022, by 
and among Rare Delaware Inc., Ultragenyx Pharmaceutical 
Inc. and OCM LS23 Holdings LP
10-K  
2/14/2020
10.25
10-Q  
7/29/2022
10.30*
  Unit Purchase Agreement, dated as of July 15, 2022, by and 
10-Q  
7/29/2022
among Ultragenyx Pharmaceutical Inc., GeneTx 
Biotherapeutics LLC, the Unitholders and Deborah A. 
Guagliardo
10.31#
  2011 Equity Incentive Plan (including forms of Stock Option 
S-1
11/8/2013
Grant Notice and Stock Option Agreement thereunder)
10.32#
  Amendment to the 2011 Equity Incentive Plan
10.33#
  2014 Incentive Plan (as amended)
S-1
11/8/2013
10-K  
2/17/2017
10.34#
  Form of Incentive Stock Option Agreement
  S-1/A  
1/17/2014
10.35#
  Form of Non Statutory Stock Option Agreement (Employees)   S-1/A  
1/17/2014
10.36#
  Form of Non Statutory Stock Option Agreement (Employees)
10-Q  
5/10/2016
(ex-U.S.)
10.37#
  Form of Restricted Stock Unit Agreement (Employees)
10-Q  
5/10/2016
10.38#
  Form of Restricted Stock Unit Agreement (Employees)(ex-
10-Q  
5/10/2016
U.S.)
10.39#
  Form of Non-Statutory Stock Option Agreement (Annual 
10-Q  
8/3/2021
Grant for Directors)
10.40#
  Form of Restricted Stock Unit Agreement (Annual Grant for 
10-Q  
8/3/2021
Directors)
10.41#
  Form of Non-Statutory Stock Option Agreement (Grant for 
10-Q  
8/3/2021
New Directors)
10.42#
  Form of Restricted Stock Unit Agreement (Grant for New 
10-Q  
8/3/2021
Directors)
10.43#
  Form of Performance Stock Unit Agreement (2021)
10.44#
  Form of Performance Stock Unit Agreement (2022)
10-Q  
10-Q  
5/5/2021
5/6/2022
10.45#
  2014 Employee Stock Purchase Plan (as amended)
10-K  
2/17/2017
10.46#
  Corporate Bonus Plan
  S-1/A  
1/17/2014
88
10.1
10.2
10.11
10.12
10.20
10.14
10.15
10.3
10.1
10.2
10.2
10.3
10.4
10.5
10.1
10.1
10.28
10.27
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.47#
  Employment Inducement Plan
10-K  
2/12/2021
10.48#
  Form of Non Statutory Stock Option Agreement (Inducement 
10-K  
2/12/2021
Plan)
10.49#
  Form of Non Statutory Stock Option Agreement (Inducement 
10-K  
2/12/2021
Plan) (ex-US)
10.50#
  Form of Restricted Stock Unit Agreement (Inducement Plan)
10-K  
2/12/2021
10.51#
  Form of Restricted Stock Unit Agreement (Inducement Plan)
10-K  
2/12/2021
(ex-US)
10.52#
  Ultragenyx Pharmaceutical Inc. Deferred Compensation Plan  
10-Q  
8/3/2021
10.53#
  Amendment No. 1 to the Ultragenyx Pharmaceutical Inc. 
10-Q  
11/3/2021
Deferred Compensation Plan
10.43
10.44
10.45
10.46
10.47
10.1
10.1
10.54#
  Executive Employment Agreement, dated as of June 15, 
S-1
11/8/2013
10.18
2011, between Ultragenyx Pharmaceutical Inc. and Emil D. 
Kakkis, M.D., Ph.D.
10.55#
  Amendment No. 1 to Executive Employment Agreement, 
10-Q  
8/11/2014
dated August 8, 2014, between Ultragenyx Pharmaceutical 
Inc. and Emil D. Kakkis, M.D., Ph.D.
10.56#
  Amendment No. 2, dated September 13, 2022, to Executive 
10-Q  
11/3/2022
Employment Agreement between Ultragenyx Pharmaceutical 
Inc. and Emil D. Kakkis, M.D., Ph.D.
10.57#
  Offer Letter, dated as of October 31, 2011, between 
S-1
11/8/2013
Ultragenyx Pharmaceutical Inc. and Thomas Kassberg
10.58#
  Amendment No. 1 to Offer Letter, dated as of August 8, 2014, 
10-Q  
8/11/2014
10.59#
between Ultragenyx Pharmaceutical Inc. and Thomas 
Kassberg
Amendment No. 2, dated September 13, 2022, to Offer Letter 
between Ultragenyx Pharmaceutical Inc. and Thomas 
Kassberg
10-Q  
11/3/2022
10.60#
  Offer Letter, dated as of April 26, 2016, between Ultragenyx 
10-Q  
8/9/2016
Pharmaceutical Inc. and Karah Parschauer
10.61#
  Amendment, dated September 13, 2022, to Offer Letter 
10-Q  
11/3/2022
between Ultragenyx Pharmaceutical Inc. and Karah 
Parschauer
10.62#
  Offer Letter, dated as of February 20, 2015, between 
Ultragenyx Pharmaceutical Inc. and Dennis Huang
10-K  
2/17/2017
10.63#
  Amendment, dated September 13, 2022, to Offer Letter 
10-Q  
11/3/2022
between Ultragenyx Pharmaceutical Inc. and Dennis Huang
10.64#
  Offer Letter, dated as of June 11, 2015, between Ultragenyx 
10-K  
2/17/2017
Pharmaceutical Inc. and John R. Pinion II
10.65#
  Amendment, dated September 13, 2022, to Offer Letter 
10-Q  
11/3/2022
between Ultragenyx Pharmaceutical Inc. and John R. Pinion 
II
10.2
10.2
10.19
10.3
10.5
10.3
10.6
10.36
10.7
10.37
10.9
10.66#
  Offer Letter, dated as of January 15, 2018, between 
10-K  
2/21/2018
10.46
Ultragenyx Pharmaceutical Inc. and Camille Bedrosian, M.D.
89
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.67#
  Amendment, dated September 13, 2022, to Offer Letter 
between Ultragenyx Pharmaceutical Inc. and Camille 
Bedrosian, M.D.
10-Q  
11/3/2022
10.68#
  Offer Letter, dated May 16, 2017, between Ultragenyx 
10-Q  
8/2/2019
Pharmaceutical Inc. and Erik Harris
10.69#
  Addendum #1, dated August 8, 2017, to Offer Letter dated 
May 16, 2017 between Ultragenyx Pharmaceutical Inc. and 
Erik Harris
10-Q  
8/2/2019
10.70#
  Addendum #2, dated June 19, 2019, to Offer Letter dated 
10-Q  
8/2/2019
May 16, 2017 between Ultragenyx Pharmaceutical Inc. and 
Erik Harris
10.71#
  Amendment No. 3, dated September 13, 2022, to Offer Letter 
10-Q  
11/3/2022
between Ultragenyx Pharmaceutical Inc. and Erik Harris
10.72#
  Form of Indemnification Agreement
10-K  
3/24/2014
10.73
  Standard Lease, dated as of July 5, 2011, between 
S-1
11/8/2013
Ultragenyx Pharmaceutical Inc. and Condiotti Enterprises, 
Inc.
10.3
10.4
10.5
10.6
10.8
10.23
10.22
10.74
  Addendum One to Standard Lease, dated as of July 5, 2011, 
10-K  
2/26/2016
10.34
between Ultragenyx Pharmaceutical Inc. and Condiotti 
Enterprises, Inc.
10.75
  Addendum Two to Standard Lease, dated as of March 7, 
10-K  
2/26/2016
10.35
2012, between Ultragenyx Pharmaceutical Inc. and Condiotti 
Enterprises, Inc.
10.76
  Addendum #3 to Standard Lease, effective as of February 12, 
2014, between Ultragenyx Pharmaceutical Inc. and Condiotti 
Enterprises, Inc.
8-K
2/25/2014
10.77
  Addendum #4 to Standard Lease, effective as of March 9, 
8-K
3/13/2015
10.1
10.1
2015, between Ultragenyx Pharmaceutical Inc. and Condiotti 
Enterprises, Inc.
10.78
  Addendum #5 to Standard Lease, effective as of April 7, 
10-K  
2/26/2016
10.38
2015, between Ultragenyx Pharmaceutical Inc. and Condiotti 
Enterprises, Inc.
10.79
  Addendum #6 to Standard Lease, effective as of April 29, 
10-Q  
8/2/2019
10.3
2019, between Ultragenyx Pharmaceutical Inc. and Condiotti 
Enterprises, Inc.
10.80
  Lease Agreement, dated as of December 8, 2015, between 
10-K  
2/26/2016
10.43
Marina Boulevard Property, LLC and Ultragenyx 
Pharmaceutical Inc.
10.81
  Indenture of Lease, dated March 11, 2014, between 
10-K  
2/21/2018
10.64
Dimension Therapeutics, Inc. and Rivertech Associates II, 
LLC
10.82
  Second Lease Amendment, dated April 28, 2017, to the 
10-K  
2/21/2018
10.65
Lease between Dimension Therapeutics, Inc. and Rivertech 
Associates II, LLC
10.83
  Third Lease Amendment, dated December 31, 2018, to the 
10-K  
2/20/2019
10.66
Lease between Ultragenyx Pharmaceutical Inc. and Rivertech 
Associates II, LLC
90
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.84
  Lease Agreement, dated November 2, 2015, between 
10-K  
2/21/2018
10.66
Dimension Therapeutics, Inc. and ARE-MA Region No. 20, 
LLC, and Consent to Assignment to Ultragenyx 
Pharmaceutical Inc.
10.85
  First Amendment to Lease Agreement, dated March 20, 
10-Q  
5/8/2018
2018, between Ultragenyx Pharmaceutical Inc. and ARE-MA 
Region No. 20, LLC
10.86
  Second Amendment to Lease Agreement, dated July 1, 2018, 
10-Q  
8/3/2018
between Ultragenyx Pharmaceutical Inc. and ARE-MA 
Region No. 20, LLC
10.87
  Third Amendment to the Lease Agreement, dated July 29, 
10-Q  
7/30/2020
2019, between Ultragenyx Pharmaceutical Inc. and ARE-MA 
Region No., LLC.
10.6
10.3
10.2
10.88
  Amended and Restated Fourth Amendment, dated August 4, 
10-Q  
10/27/2020
10.5
2020, to the Lease Agreement between Ultragenyx 
Pharmaceutical Inc. and ARE-MA Region No., LLC.
10.89
  Lease Agreement, dated December 15, 2019, between 
10-K  
2/12/2021
10.81
Ultragenyx Pharmaceutical Inc. and ARE-San Francisco No. 
17, LLC.
10.90
10.91
  First Amendment, dated September 20, 2020, to the Lease 
Agreement between Ultragenyx Pharmaceutical Inc. and 
ARE-San Francisco No. 17, LLC.
  Second Amendment, dated October 21, 2020, to the Lease 
Agreement between Ultragenyx Pharmaceutical Inc. and 
ARE-San Francisco No. 17, LLC.
10.92
  Third Amendment, dated July 27, 2022, to the Lease 
Agreement between Ultragenyx Pharmaceutical Inc. and 
ARE-San Francisco No. 17, LLC
10-K  
2/12/2021
10.82
10-K  
2/12/2021
10.83
10.93
  Office Lease, dated April 19, 2019, between Ultragenyx 
10-K  
2/14/2020
Pharmaceutical Inc. and Woburn MCB II, LLC
10.94
  Commercial Lease, dated July 2, 2018, between Ultragenyx 
10-K  
2/14/2020
Pharmaceutical Inc. and 32 Leveroni LLC
10.70
10.71
10.95
  Lease, dated August 18, 2022, between Ultragenyx 
Pharmaceutical Inc. and Brickbottom I QOZB L.P.
21.1
23.1
24.1
31.1
32.1§
  Subsidiaries of Ultragenyx Pharmaceutical Inc.
  Consent of Independent Registered Public Accounting Firm  
  Power of Attorney (included on the signature page of this 
report)
  Certification of Principal Executive Officer and Principal 
Financial Officer of Ultragenyx Pharmaceutical Inc., as 
required by Rule 13a-14(a) or Rule 15d-14(a) of the 
Exchange Act as adopted pursuant to Section 302 of the 
Sarbanes-Oxley Act of 2002
  Certification by the Principal Executive Officer and Principal 
Financial Officer, as required by Rule 13a-14(b) or Rule 15d-
14(b) and Section 1350 of Chapter 36 of Title 18 of the United 
States Code (18 U.S.C. §1350)
101.INS   XBRL Instance Document, formatted in Inline XBRL
91
X
X
X
X
X
X
X
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
101.SCH   Inline XBRL Taxonomy Extension Schema Document
101.CAL   Inline XBRL Taxonomy Extension Calculation Linkbase 
Document
101.DEF   Inline XBRL Taxonomy Extension Definition Linkbase 
Document
101.LAB   Inline XBRL Taxonomy Extension Labels Linkbase Document  
101.PRE   Inline XBRL Taxonomy Extension Presentation Linkbase 
Document
104
  The cover page from this Annual Report on Form 10-K, 
formatted in Inline XBRL
X
X
X
X
X
* Certain identified information has been omitted by means of marking such information with asterisks in reliance on Item 601(b)(10)(iv) of 
Regulation S-K because it is both (i) not material and (ii) the type that the registrant treats as private or confidential.
# Indicates management contract or compensatory plan. 
§ The certification attached as Exhibit 32.1 that accompanies this Annual Report is not deemed filed with the SEC and is not to be 
incorporated by reference into any filing of Ultragenyx Pharmaceutical Inc. under the Securities Act or the Exchange Act, whether made 
before or after the date of this Annual Report, irrespective of any general incorporation language contained in such filing. 
Item 16. Form 10-K Summary
None.
92
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report 
to be signed on its behalf by the undersigned, thereunto duly authorized. 
SIGNATURES 
ULTRAGENYX PHARMACEUTICAL INC.
By:
 /s/ Emil D. Kakkis
Emil D. Kakkis, M.D., Ph.D.
President and Chief Executive Officer
(Principal Executive Officer and Principal Financial Officer)
Date: February 16, 2023
POWER OF ATTORNEY 
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Emil D. 
Kakkis, M.D., Ph.D., as his or her true and lawful attorneys-in-fact and agents, with full power of substitution for him or her, and in his or her 
name in any and all capacities, to sign any and all amendments to this Annual Report, and to file the same, with exhibits thereto and other 
documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each 
of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done therewith, as fully to all 
intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, and 
any of them, his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof. 
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on 
behalf of the registrant and in the capacities and on the dates indicated. 
Signature  
/s/ Emil D. Kakkis
 Emil D. Kakkis, M.D., Ph.D.
/s/ Theodore A. Huizenga
 Theodore A. Huizenga
/s/ Daniel G. Welch
 Daniel G. Welch
/s/ Deborah Dunsire
Deborah Dunsire, M.D.
/s/ Lars Ekman
Lars Ekman, M.D., Ph.D.
/s/ Matthew K. Fust
 Matthew K. Fust
/s/ Michael Narachi
 Michael Narachi
/s/ Corsee D. Sanders
 Corsee D. Sanders, Ph.D.
/s/ Amrit Ray, M.D.
Amrit Ray, M.D.
/s/ Shehnaaz Suliman
Shehnaaz Suliman, M.D.
Title
President and Chief Executive Officer and Director
(Principal Executive Officer and Principal Financial Officer)
Senior Vice President and Chief Accounting Officer
(Principal Accounting Officer)
Chairman of the Board
Director
Director
Director
Director
Director
Director
Director
93
Date
February 16, 2023
February 16, 2023
February 16, 2023
February 16, 2023
February 16, 2023
February 16, 2023
February 16, 2023
February 16, 2023
February 16, 2023
February 16, 2023
 
  
  
  
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ultragenyx Pharmaceutical Inc. 
INDEX TO FINANCIAL STATEMENTS 
Report of Independent Registered Public Accounting Firm (PCAOB ID: 42)
Consolidated Financial Statements:
Consolidated Balance Sheets
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Loss
Consolidated Statements of Stockholders’ Equity 
Consolidated Statements of Cash Flows
Notes to Consolidated Financial Statements
F-1
Page
F-2
F-4
F-5
F-5
F-6
F-7
F-9
 
  
  
 
 
 
 
Report of Independent Registered Public Accounting Firm
To the Stockholders and the Board of Directors of Ultragenyx Pharmaceutical Inc.
Opinion on the Financial Statements 
We have audited the accompanying consolidated balance sheets of Ultragenyx Pharmaceutical Inc. (the Company) as of December 
31, 2022 and 2021, the related consolidated statements of operations, comprehensive loss, stockholders' equity and cash flows for each of 
the three years in the period ended December 31, 2022, and the related notes (collectively referred to as the “consolidated financial 
statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the 
Company at December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended 
December 31, 2022, in conformity with U.S. generally accepted accounting principles.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) 
(PCAOB), the Company's internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control-
Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report 
dated February 16, 2023 expressed an unqualified opinion thereon.
Basis for Opinion
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the 
Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be 
independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the 
Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the 
audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. 
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or 
fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the 
amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant 
estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits 
provide a reasonable basis for our opinion.
Critical Audit Matter
The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was 
communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the 
financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit 
matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating 
the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.
Liabilities for sales of future royalties
Description of the 
Matter
As discussed in Note 10, the Company has entered into two royalty purchase agreements, under 
which the Company sold its rights to receive royalty payments arising from the net sales of Crysvita 
in the European and North American markets in exchange for $320 million and $500 million, 
respectively. The proceeds from each transaction were recorded as liabilities that are being 
amortized using the effective interest method over the estimated lives of the respective 
arrangements. In order to determine the amortization of the liabilities, the Company is required to 
estimate the total amount of future royalty payments to be paid to the respective counterparty, 
subject to the capped amount, over the life of the arrangement. The Company estimates an imputed 
interest on the unamortized portion of the liability and records non-cash interest expense relating to 
the transaction.  
Auditing the Company’s liabilities related to the sale of future royalties was complex due to the 
subjective judgments required to forecast the expected royalty payments subject to each agreement. 
Specifically, the forecasted revenues of Crysvita involve significant estimation uncertainty given the 
limited historical Crysvita sales data.
F-2
 
 
 
 
 
 
 
 
 
How We 
Addressed the 
Matter in Our 
Audit
We obtained an understanding, evaluated the design and tested the operating effectiveness of 
controls over the Company’s process of accounting for the liabilities related to the sale of future 
royalties, including controls over the Company’s estimates of projected sales of Crysvita in the 
European and North American markets. 
To test management’s estimates of the future royalties and the imputed effective interest rates, we 
performed audit procedures that included, among others, evaluating the reasonableness of 
management’s assumptions related to the treatable patient populations, estimated pricing and 
reimbursement, and the rate of adoption. We compared the significant assumptions with historical 
trends of actual sales, analyst expectations and performed sensitivity analyses of estimated future 
royalties to evaluate the changes in the future royalties on the implied effective interest rates. 
/s/ Ernst & Young LLP
We have served as the Company’s auditor since 2010.
San Mateo, California 
February 16, 2023
F-3
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
CONSOLIDATED BALANCE SHEETS 
(In thousands, except share and per share amounts)
ASSETS
Current assets:
Cash and cash equivalents
Marketable debt securities
Accounts receivable, net
Inventory
Prepaid expenses and other current assets
Total current assets
Property, plant, and equipment, net
Equity investments
Marketable debt securities
Right-of-use assets
Intangible assets, net
Goodwill
Other assets
Total assets
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable
Accrued liabilities
Contract liabilities
Lease liabilities
Total current liabilities
Contract liabilities
Lease liabilities
Deferred tax liabilities
Liabilities for sales of future royalties
Other liabilities
Total liabilities
Commitments and contingencies (Notes 9 and 15)
Stockholders’ equity:
Preferred stock, par value of $0.001 per share—25,000,000 shares authorized; nil
   outstanding as of December 31, 2022 and December 31, 2021
Common stock, par value of $0.001 per share—250,000,000 shares authorized;
   70,197,297 and 69,344,998 shares issued and outstanding as of December 31, 2022
   and December 31, 2021, respectively
Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit
Total stockholders’ equity
Total liabilities and stockholders’ equity
See accompanying notes.
F-4
December 31,
2022
2021
  $
  $
132,944     $
614,818    
40,445    
26,766    
68,926    
883,899    
259,726    
5,531    
148,970    
25,961    
160,105    
44,406    
16,846    
1,545,444     $
  $
43,274     $
204,678    
1,479    
11,779    
261,210    
—    
19,814    
31,667    
875,439    
4,820    
1,192,950    
307,584  
432,612  
28,432  
16,231  
71,745  
856,604  
141,247  
34,925  
258,933  
34,936  
130,788  
44,406  
20,558  
1,522,397  
17,138  
145,555  
7,609  
11,066  
181,368  
1,467  
30,904  
33,306  
351,786  
1,005  
599,836  
—    
—  
70    
3,140,019    
(6,573 )  
(2,781,022 )  
352,494    
1,545,444     $
69  
2,997,497  
(1,404 )
(2,073,601 )
922,561  
1,522,397  
  $
 
  
 
 
 
 
 
   
 
 
 
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC.
CONSOLIDATED STATEMENTS OF OPERATIONS 
(In thousands, except share and per share amounts)
Revenues:
Collaboration and license
Product sales
Non-cash collaboration royalty revenue
Total revenues
Operating expenses:
Cost of sales
Research and development
Selling, general and administrative
Total operating expenses
Loss from operations
Interest income
Change in fair value of equity investments
Non-cash interest expense on liabilities for sales of future royalties
Other income (expense)
Loss before income taxes
Provision for income taxes
Net loss
Net loss per share, basic and diluted
Weighted-average shares used in computing net loss per share, basic and diluted
See accompanying notes.
Year Ended December 31,
2021
2022
2020
  $
222,710     $
118,927    
21,692    
363,329    
256,438     $
77,017    
17,951    
351,406    
28,320    
705,789    
278,139    
1,012,248    
(648,919 )  
11,074    
(19,299 )  
(43,015 )  
(1,566 )  
(701,725 )  
(5,696 )  
(707,421 )   $
(10.12 )   $
16,008    
497,153    
219,982    
733,143    
(381,737 )  
1,928    
(42,063 )  
(29,422 )  
(1,687 )  
(452,981 )  
(1,044 )  
(454,025 )   $
(6.70 )   $
  $
  $
219,315  
38,720  
12,995  
271,030  
6,129  
412,084  
182,933  
601,146  
(330,116 )
7,038  
170,403  
(33,291 )
607  
(185,359 )
(1,207 )
(186,566 )
(3.07 )
  69,914,225    
  67,795,540    
  60,845,550  
ULTRAGENYX PHARMACEUTICAL INC. 
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS 
(In thousands)
Net loss
Other comprehensive income (loss):
Foreign currency translation adjustments
Unrealized gain (loss) on available-for-sale securities
Other comprehensive income (loss):
Total comprehensive loss
Year Ended December 31,
2021
(454,025 )   $
2022
(707,421 )   $
(724 )  
(4,445 )  
(5,169 )  
(712,590 )   $
(550 )  
(1,543 )  
(2,093 )  
(456,118 )   $
2020
(186,566 )
735  
101  
836  
(185,730 )
  $
  $
See accompanying notes. 
F-5
 
  
 
 
 
 
 
   
   
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance as of December 31, 2019
Issuance of common stock in connection with 
underwritten
   public offering, net of issuance costs
Issuance of common stock in connection with 
license agreement, 
    net of issuance costs
Issuance of common stock in connection with at-
the-market
    offering, net of issuance costs
Stock-based compensation
Issuance of common stock upon exercise of 
warrants and under 
    equity plan awards, net of tax
Other comprehensive income
Net loss
Balance as of December 31, 2020
Issuance of common stock in connection with at-
the-market
    offering, net of issuance costs
Stock-based compensation
Issuance of common stock under
   equity plan awards, net of tax
Other comprehensive loss
Net loss
Balance as of December 31, 2021
Stock-based compensation
Issuance of common stock under
   equity plan awards, net of tax
Other comprehensive loss
Net loss
Balance as of December 31, 2022
283,333  
—  
2,341,944  
—  
—  
66,818,520  
1,050,372  
—  
1,476,106  
—  
—  
69,344,998  
—  
852,299  
—  
—  
70,197,297  
ULTRAGENYX PHARMACEUTICAL INC. 
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY 
(In thousands, except share amounts)
Common Stock
Shares
57,838,220  
  $
Amount
Additional
Paid-In
Capital
Accumulated
Other
Comprehensiv
e
Income (Loss)  
58     $
2,086,863     $
(147 )   $
  Accumulated  
Deficit
(1,433,010 )   $
Total
Stockholders'
Equity
653,764  
5,111,110  
5    
435,551    
1,243,913  
1    
55,267    
—    
—    
3    
—    
—    
67    
1    
—    
1    
—    
—    
69    
—    
20,391    
85,833    
89,290    
—    
—    
2,773,195    
78,942    
105,260    
40,100    
—    
—    
2,997,497    
131,710    
—    
—    
—    
—    
—    
836    
—    
689    
—    
—    
—    
(2,093 )  
—    
(1,404 )  
—    
—    
435,556  
—    
55,268  
—    
—    
20,391  
85,833  
—    
—    
(186,566 )  
(1,619,576 )  
89,293  
836  
(186,566 )
1,154,375  
—    
—    
—    
—    
(454,025 )  
(2,073,601 )  
—    
78,943  
105,260  
40,101  
(2,093 )
(454,025 )
922,561  
131,710  
10,813  
(5,169 )
(707,421 )
352,494  
1    
—    
—    
70     $
10,812    
—    
—    
3,140,019     $
—    
(5,169 )  
—    
(6,573 )   $
—    
—    
(707,421 )  
(2,781,022 )   $
  $
See accompanying notes.
F-6
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
CONSOLIDATED STATEMENTS OF CASH FLOWS 
(In thousands)
Operating activities:
Net loss
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation
Acquired in-process research and development
Amortization of premium (discount) on marketable debt securities, net
Depreciation and amortization
Change in fair value of equity investments
Non-cash collaboration royalty revenue
Non-cash interest expense on liabilities for sales of future royalties
Other
Changes in operating assets and liabilities:
Accounts receivable
Inventory
Prepaid expenses and other assets
Accounts payable, accrued, and other liabilities
Contract liabilities, net
Deferred tax liabilities
Net cash used in operating activities
Investing activities:
Purchase of property, plant, and equipment
Acquisition, net of cash acquired
Purchase of marketable debt securities
Purchase of equity investments
Proceeds from sale of marketable debt securities
Proceeds from sale of equity investments
Proceeds from maturities of marketable debt securities
Payment for intangible asset
Other
Net cash used in investing activities
Financing activities:
Proceeds from the sale of future royalties, net
Proceeds from the issuance of common stock in connection with underwritten 
    public offerings, net
Proceeds from the issuance of common stock in connection with the license
   agreement, net
Proceeds from the issuance of common stock in connection with at-the-market
   offering, net
Proceeds from the issuance of common stock from exercise of warrants and equity
    plan awards, net
Other
Net cash provided by financing activities
Effect of exchange rate changes on cash
Net (decrease) increase in cash, cash equivalents, and restricted cash
Cash, cash equivalents, and restricted cash at beginning of year
Cash, cash equivalents, and restricted cash at end of year
See accompanying notes. 
F-7
Year Ended December 31,
2021
2022
2020
  $
(707,421 )   $
(454,025 )   $ (186,566 )
130,377    
75,033  
2,699    
18,220    
19,299      
(21,692 )    
43,015      
(230 )    
(12,068 )    
(9,701 )    
3,798    
87,442    
(7,597 )  
(1,639 )  
(380,465 )  
104,952    
—  
6,606    
13,239    
42,063      
(17,951 )    
29,422      
235      
(5,432 )    
(3,117 )    
(29,508 )  
32,313    
(57,492 )  
—    
(338,695 )  
(116,123 )  
(75,025 )
(614,735 )  
—    
84,275    
10,094    
450,706    
(30,000 )  
(844 )  
(291,652 )  
(73,093 )  
—    
  (1,012,187 )  
—    
92,896    
79,843    
718,111    
—    
(942 )    
(195,372 )  
85,735  
—  
848  
12,261  
(170,403 )
(12,995 )
33,291  
946  
9,840  
(1,346 )
2,748  
26,853  
66,568  
—  
(132,220 )
(43,905 )
—  
(813,237 )
(37,062 )
50,990  
79,842  
589,806  
—  
(5,555 )
(179,121 )
490,950    
—    
—  
—    
—    
—    
—    
435,556  
—    
55,268  
78,943    
20,391  
10,813    
(555 )  
501,208    
(1,075 )  
(171,984 )  
309,585    
137,601     $
40,101    
(492 )  
118,552    
(1,194 )  
(416,709 )  
726,294    
309,585     $
89,293  
(236 )
600,272  
1,119  
290,050  
436,244  
726,294  
  $
 
  
 
 
 
 
 
   
   
 
 
     
     
   
 
 
   
 
   
 
 
 
 
 
 
  
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
CONSOLIDATED STATEMENTS OF CASH FLOWS 
(In thousands)
Year Ended December 31,
2021
2020
2022
Supplemental disclosures of non-cash investing and financing information:
Acquired lease liabilities arising from obtaining right-of-use assets
Stock-based compensation capitalized into ending inventory
Costs of property, plant and equipment included in accounts payable, accrued, and other 
liabilities
Non-cash interest expense on liabilities for sales of future royalties capitalized during the 
year into ending property, plant and equipment
  $
  $
  $
  $
1,168     $
2,340     $
3,142     $
1,453     $
18,775  
1,304  
17,963     $
18,993     $
8,515  
11,380     $
4,650     $
—  
See accompanying notes.
F-8
 
 
 
 
 
 
   
   
 
 
 
   
 
   
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements
1.
Organization and Basis of Presentation 
Ultragenyx Pharmaceutical Inc., or the Company, is a biopharmaceutical company incorporated in Delaware.
The Company is focused on the identification, acquisition, development, and commercialization of novel products for the treatment of 
serious rare and ultra-rare genetic diseases. The Company operates as one reportable segment and has four commercially approved 
products. 
Crysvita® (burosumab) is approved in the United States, or U.S., the European Union, or EU, and certain other regions for the 
treatment of X-linked hypophosphatemia, or XLH, in adult and pediatric patients one year of age and older. Crysvita is also approved in the 
U.S. and certain other regions for the treatment of fibroblast growth factor 23, or FGF23,-related hypophosphatemia in tumor-induced 
osteomalacia, or TIO, associated with phosphaturic mesenchymal tumors that cannot be curatively resected or localized in adults and 
pediatric patients 2 years of age and older.
Mepsevii® (vestronidase alfa) is approved in the U.S., the EU and certain other regions, as the first medicine for the treatment of 
children and adults with mucopolysaccharidosis VII, or MPS VII, also known as Sly syndrome. 
Dojolvi® (triheptanoin) is approved in the U.S. and certain other regions for the treatment of pediatric and adult patients severely 
affected by long-chain fatty acid oxidation disorders, or LC-FAOD. 
Evkeeza® (evinacumab) is approved in the U.S. and the European Economic Area, or EEA, for the treatment of homozygous familial 
hypercholesterolemia, or HoFH. In January 2022, the Company licensed exclusive rights from Regeneron Pharmaceuticals, or Regeneron, to 
commercialize Evkeeza® (evinacumab) outside of the U.S.
In addition to the approved products, the Company has the following ongoing clinical development programs: 
•
•
•
•
•
•
•
UX111 (formerly ABO-102) is an AAV9 gene therapy product candidate for the treatment of patients with Sanfilippo syndrome 
type A, or MPS IIIA, a rare lysosomal storage disease. In May 2022, the Company announced an exclusive license agreement 
with Abeona Therapeutics Inc., or Abeona, for UX111 whereby the Company assumed responsibility for the UX111 program, as 
further described in Note 8;
DTX401 is an adeno-associated virus 8, or AAV8, gene therapy product candidate for the treatment of patients with glycogen 
storage disease type Ia, or GSDIa;
DTX301 is an AAV8 gene therapy product candidate in development for the treatment of patients with ornithine 
transcarbamylase, or OTC deficiency, the most common urea cycle disorder;
UX143 (setrusumab), which is subject to the Company’s collaboration agreement with Mereo BioPharma 3, or Mereo, is a fully 
human monoclonal antibody that inhibits sclerostin, a protein that acts on a key bone-signaling pathway and inhibits the activity 
of bone-forming cells for the treatment of patients with osteogenesis imperfect, or OI; 
GTX-102 is an antisense oligonucleotide, or ASO, which the Company is developing through GeneTx Biotherapeutics LLC, or 
GeneTx, for the treatment of Angelman syndrome, a debilitating and rare neurogenetic disorder caused by loss-of-function of 
the maternally inherited allele of the UBE3A gene. In July 2022, the Company executed its option to acquire GeneTx as further 
described in Note 7;
UX701 is an adeno-associated virus 9, or AAV9, gene therapy designed to deliver stable expression of a truncated version of 
the ATP7B copper transporter following a single intravenous infusion to improve copper distribution and excretion from the body 
and reverse pathological findings of Wilson liver disease; and
UX053 is a messenger RNA, or mRNA, product candidate designed for the treatment of patients with Glycogen Storage Disease 
Type III, or GSDIII, a disease caused by a glycogen debranching enzyme, or AGL, deficiency that results in glycogen 
accumulation in the liver and muscle.
The Company has sustained operating losses and expects such annual losses to continue over the next several years. The 
Company’s ultimate success depends on the outcome of its research and development and commercialization activities. Management 
recognizes that the Company will likely need to raise additional capital to fully implement its business plans. Through December 31, 2022, 
the Company has relied primarily on its sale of equity securities, its revenues from commercial products, its sale of future royalties, and 
strategic collaboration arrangements, to finance its operations.
F-9
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The Company expects it will need to raise additional capital through the issuance of equity, borrowings, or strategic alliances with 
partner companies. However, if such financing is not available at adequate levels, the Company would need to reevaluate its operating plans.
2.
Summary of Significant Accounting Policies 
Basis of Consolidation 
The Consolidated Financial Statements include the accounts of Ultragenyx Pharmaceutical Inc. and its wholly owned subsidiaries. All 
intercompany balances and transactions have been eliminated.
Use of Estimates 
The accompanying Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting 
principles, or GAAP. The preparation of the Consolidated Financial Statements in conformity with GAAP requires management to make 
estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities and the reported 
amounts of expenses in the Consolidated Financial Statements and the accompanying notes. On an ongoing basis, management evaluates 
its estimates, including those related to clinical trial accruals, fair value of assets and liabilities, income taxes, stock-based compensation, 
revenue recognition, and the liabilities for sales of future royalties. Management bases its estimates on historical experience and on various 
other market-specific and relevant assumptions that management believes to be reasonable under the circumstances. Actual results could 
differ from those estimates.
Cash, Cash Equivalents, and Restricted Cash 
The Company considers all highly liquid investments with original maturities of three months or less from the date of purchase to be 
cash equivalents. Cash equivalents consist primarily of amounts invested in money market accounts. 
Restricted cash primarily consists of money market accounts used as collateral for the Company’s obligations under its facility leases 
and the gene therapy building construction project.
The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance 
Sheets that sum to the total of the amounts shown in the Consolidated Statements of Cash Flows (in thousands):
December 31,
Cash and cash equivalents
  2022
    2021    2020  
713,52
6  
307,58
4   $
 $132,944    $
Restricted cash included in prepaid expenses and     other current 
assets
Restricted cash included in other assets
Total cash, cash equivalents, and restricted cash 
    shown in the statements of cash flows
862     
3,795     
 $137,601    $
—     10,847  
2,001     1,921  
726,29
4  
5   $
309,58
Marketable Debt Securities 
All marketable debt securities have been classified as “available-for-sale” and are carried at estimated fair value as determined based 
upon quoted market prices or pricing models for similar securities. Management determines the appropriate classification of its investments 
at the time of purchase and reevaluates such designation as of each balance sheet date. Investments with a maturity of one year or less from 
the balance sheet date are reported as current marketable debt securities and investments with a maturity of greater than one year from the 
balance sheet date are reported as non-current marketable debt securities. Unrealized gains and losses are excluded from earnings and are 
reported as a component of comprehensive loss. Realized gains and losses and declines in fair value judged to be other than temporary, if 
any, on available-for-sale securities are included in other income (expense). The cost of securities sold is based on the specific-identification 
method. Interest on investments is included in interest income.
Equity Investments
The Company records investments in equity securities, other than equity method investments, at fair market value, if the fair value is 
readily determinable. Equity securities with no readily determinable fair values are recorded using the measurement alternative of cost 
adjusted for observable price changes in orderly transactions for identical or similar investments of the same issuer less impairment, if any. 
Investments in equity securities are recorded in Equity investments on the Company's Consolidated 
F-10
 
 
 
 
 
 
  
  
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Balance Sheets. Unrealized gains and losses are reported in Change in fair value of equity investments on the Company’s Consolidated 
Statements of Operations. The Company regularly reviews its non-marketable equity securities for indicators of impairment.
Concentration of Credit Risk, Credit Losses, and Other Risks and Uncertainties
Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents, and 
investments. The Company’s cash, cash equivalents, and investments are held by financial institutions that management believes are of high 
credit quality. The Company’s investment policy limits investments to fixed income securities denominated and payable in U.S. dollars such 
as U.S. government obligations, money market instruments and funds, corporate bonds, commercial paper, and asset-backed securities and 
places restrictions on maturities and concentrations by type and issuer. Such deposits may, at times, exceed federally insured limits. The 
Company has not experienced any losses on its deposits of cash and cash equivalents and its accounts are monitored by management to 
mitigate risk. The Company is exposed to credit risk in the event of default by the financial institutions holding its cash and cash equivalents, 
corporate issuers, and other financial instruments, to the extent recorded in the Consolidated Balance Sheets.
For trade receivables and other instruments, the Company uses a new forward-looking expected loss model that generally results in 
the earlier recognition of allowances for losses. For available-for-sale debt securities with unrealized losses, the losses are recognized as 
allowances rather than as reductions in the amortized cost of the securities. 
The Company is exposed to credit losses primarily through receivables from customers and collaborators and through its available-for-
sale debt securities. For trade receivables and other instruments, the Company uses a forward-looking expected loss model that generally 
results in the earlier recognition of allowances for losses. For available-for-sale debt securities with unrealized losses, the losses are 
recognized as allowances rather than as reductions in the amortized cost of the securities.
The Company’s expected loss allowance methodology for the receivables is developed using historical collection experience, current 
and future economic market conditions, a review of the current aging status and financial condition of the entities. Specific allowance 
amounts are established to record the appropriate allowance for customers that have a higher probability of default. Balances are written off 
when determined to be uncollectible. The Company’s expected loss allowance methodology for the debt securities is developed by reviewing 
the extent of the unrealized loss, the size, term, geographical location, and industry of the issuer, the issuers’ credit ratings and any changes 
in those ratings, as well as reviewing current and future economic market conditions and the issuers’ current status and financial condition. 
There was no allowance for losses on available-for-sale debt securities which were attributable to credit risk for the years ended December 
31, 2022 and 2021.
The Company is dependent on third-party manufacturers to supply products for research and development activities in its programs. In 
particular, the Company relies and expects to continue to rely on a small number of manufacturers to supply it with its requirements for the 
active pharmaceutical ingredients and formulated drugs related to these programs. These programs could be adversely affected by a 
significant interruption in the supply of active pharmaceutical ingredients and formulated drugs.
Inventory
The Company values inventory at the lower of cost and net realizable value and determines the cost of inventory using the average-
cost method. The Company expenses costs associated with the manufacture of product candidates prior to regulatory approval. Inventories 
consist of currently approved products. The Company periodically reviews its inventories for excess amounts or obsolescence and writes 
down obsolete or otherwise unmarketable inventory to its estimated net realizable value. Management determines excess inventory based 
on expected future demand. Estimates related to future demand are sensitive to significant inputs and assumptions such as acceptance by 
patients and physicians and the availability of formulary coverage and adequate reimbursement from private third-party payers for the 
product.
Property, Plant, and Equipment 
Property, plant, and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization is 
computed using the straight-line method over the estimated useful lives of the respective assets. Depreciation and amortization begins at the 
time the asset is placed in service. Interest costs incurred during the construction of major capital projects are capitalized until the underlying 
asset is ready to be placed in service, at which point the interest costs are amortized as depreciation expense over the life of the underlying 
asset. Maintenance and repairs are charged to operations as incurred. Upon sale or retirement of assets, the cost and related accumulated 
depreciation or amortization are removed from the balance sheet and the resulting gain or loss, if any, is reflected in operations. 
F-11
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The useful lives of property, plant, and equipment are as follows: 
Research and development equipment
Furniture and office equipment
Computer equipment and software
Land
  5 years
  5 years
  3-5 years
  Not applicable
Leasehold improvements
  Shorter of lease term or estimated useful life
Intangible Assets
Finite-lived intangibles consist of contractual payments made for certain milestones achieved with collaboration partners. The 
contractual payments are recorded as intangible assets and are amortized over their estimated useful lives. The Company reviews its 
definite-lived intangible assets when events or circumstances may indicate that the carrying value of these assets is not recoverable and 
exceeds their fair value. The Company measures fair value based on the estimated future undiscounted cash flows associated with these 
assets in addition to other assumptions and projections that the Company deems to be reasonable and supportable. 
Indefinite-lived intangibles consist of acquired in-process research and development, or IPR&D. IPR&D assets represent capitalized 
incomplete research projects that the Company acquired through business combinations. Such assets are initially measured at their 
acquisition date fair values and are tested for impairment, until the completion or abandonment of the associated research and development 
efforts. When development of the project is complete, which generally occurs when regulatory approval to market a product is obtained, the 
associated assets will be deemed finite-lived and will be amortized over a period that best reflects the economic benefits provided by these 
assets. The Company tests its indefinite-lived intangible assets for impairment annually during the fourth quarter and more frequently if 
events or changes in circumstances indicate that it is more likely than not that the asset is impaired. 
If it is determined that an intangible asset becomes impaired, the carrying value is written down to its fair value with the related 
impairment charge recognized in Consolidated Statements of Operations in the period in which the impairment occurs. The Company has not 
recorded any impairments of intangible assets to date. 
Goodwill
Goodwill represents the excess of purchase price over fair value of net assets acquired in a business combination and is not amortized. 
Goodwill is subject to impairment testing at least annually during the fourth quarter or when a triggering event occurs that could indicate a 
potential impairment. If it is determined that the goodwill becomes impaired, the carrying value is written down to its fair value with the related 
impairment charge recognized in Consolidated Statements of Operations in the period in which the impairment occurs. The Company has not 
recorded any impairments of goodwill.
Impairment of Long-Lived Assets 
The Company evaluates its long-lived assets, including property and equipment, for impairment whenever events or changes in 
circumstances indicate that the carrying value of these assets may not be recoverable. Recoverability of these assets is measured by 
comparison of the carrying amount of each asset to the future undiscounted cash flows expected to result from the use of the asset and its 
eventual disposition. If the asset is considered to be impaired, the amount of any impairment is measured as the difference between the 
carrying value and the fair value of the impaired asset. The Company has not recorded impairment of any long-lived assets.
Accruals of Research and Development Costs 
The Company records accruals for estimated costs of research, preclinical and clinical studies and manufacturing development. These 
costs are a significant component of the Company’s research and development expenses. A substantial portion of the Company’s ongoing 
research and development activities are conducted by third-party service providers, including contract research organizations. The Company 
accrues the costs incurred under its agreements with these third parties based on actual work completed in accordance with agreements 
established with these third parties. The Company determines the actual costs through obtaining information from external service providers 
as to the progress or stage of completion of the services and the agreed-upon fee to be paid for such services.
F-12
 
  
  
  
  
  
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Revenue Recognition
Collaboration and License Revenue
The Company has certain license and collaboration agreements that are within the scope of Accounting Standards Codification, or 
ASC, 808, Collaborative Agreements, which provides guidance on the presentation and disclosure of collaborative arrangements. Generally, 
the classification of the transactions under the collaborative arrangements is determined based on the nature of contractual terms of the 
arrangement, along with the nature of the operations of the participants. The Company records its share of collaboration revenue, net of 
transfer pricing related to net sales in the period in which such sales occur, if the Company is considered as an agent in the arrangement. 
The Company is considered an agent when the collaboration partner controls the product before transfer to the customers and has the ability 
to direct the use of and obtain substantially all of the remaining benefits from the product. Funding received related to research and 
development services and commercialization costs is generally classified as a reduction of research and development expenses and selling, 
general and administrative expenses, respectively, in the Consolidated Statements of Operations, because the provision of such services for 
collaborative partners are not considered to be part of the Company’s ongoing major or central operations.
In order to record collaboration revenue, the Company utilizes certain information from its collaboration partners, including revenue 
from the sale of the product, associated reserves on revenue, and costs incurred for development and sales activities. For the periods 
covered in the financial statements presented, there have been no material changes to prior period estimates of revenues and expenses.
The Company also records royalty revenues under certain of the Company’s license or collaboration agreements in exchange for 
license of intellectual property. If the Company does not have any future performance obligations for these license or collaboration 
agreements, royalty revenue is recorded as the underlying sales occur.
The Company sold the right to receive certain royalty payments from net sales of Crysvita in certain territories to RPI Finance Trust, or 
RPI, an affiliate of Royalty Pharma, and to OCM LS23 Holdings LP, an investment vehicle for Ontario Municipal Employees Retirement 
System, or OMERS, as further described in “Note 10. Liabilities for Sales of Future Royalties”. The Company records the royalty revenue 
from the net sales of Crysvita in the applicable territories on a prospective basis as non-cash royalty revenue in the Consolidated Statements 
of Operations over the term of the applicable arrangement.
The terms of the Company’s collaboration and license agreements may contain multiple performance obligations, which may include 
licenses and research and development activities. The Company evaluates these agreements under ASC 606, Revenue from Contracts with 
Customers, or ASC 606, to determine the distinct performance obligations. The Company analogizes to ASC 606 for the accounting for 
distinct performance obligations for which there is a customer relationship. Prior to recognizing revenue, the Company makes estimates of 
the transaction price, including variable consideration that is subject to a constraint. Amounts of variable consideration are included in the 
transaction price to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur and 
when the uncertainty associated with the variable consideration is subsequently resolved. Total consideration may include nonrefundable 
upfront license fees, payments for research and development activities, reimbursement of certain third-party costs, payments based upon the 
achievement of specified milestones, and royalty payments based on product sales derived from the collaboration.
If there are multiple distinct performance obligations, the Company allocates the transaction price to each distinct performance 
obligation based on its relative standalone selling price. The standalone selling price is generally determined based on the prices charged to 
customers or using expected cost-plus margin. The Company estimates the efforts needed to complete the performance obligations and 
recognizes revenue by measuring the progress towards complete satisfaction of the performance obligations using input measures.
Product Sales
The Company sells its approved products through a limited number of distributors. Under ASC 606, revenue from product sales is 
recognized at the point in time when the delivery is made and when title and risk of loss transfers to these distributors. The Company also 
recognizes revenue from sales of certain products on a “named patient” basis, which are allowed in certain countries prior to the commercial 
approval of the product. Prior to recognizing revenue, the Company makes estimates of the transaction price, including any variable 
consideration that is subject to a constraint. Amounts of variable consideration are included in the transaction price to the extent that it is 
probable that a significant reversal in the amount of cumulative revenue recognized will not occur and when the uncertainty associated with 
the variable consideration is subsequently resolved. Product sales are recorded net of estimated government-mandated rebates and 
chargebacks, estimated product returns, and other deductions.
Provisions for returns and other adjustments are provided for in the period the related revenue is recorded, as estimated by 
management. These reserves are based on estimates of the amounts earned or to be claimed on the related sales and are reviewed 
F-13
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
periodically and adjusted as necessary. The Company’s estimates of government mandated rebates, chargebacks, estimated product 
returns, and other deductions depends on the identification of key customer contract terms and conditions, as well as estimates of sales 
volumes to different classes of payors. If actual results vary, the Company may need to adjust these estimates, which could have a material 
effect on earnings in the period of the adjustment.
Leases 
Lease agreements are evaluated to determine whether an arrangement is or contains a lease in accordance with ASC 842, Leases. 
The Company determines if an arrangement includes a lease at inception. Right-of-use lease assets and lease liabilities are recognized 
based on the present value of the future minimum lease payments over the lease term at the commencement date. The right-of-use lease 
asset includes any lease payments made and excludes lease incentives. Incremental borrowing rate is used in determining the present value 
of future payments. The Company applies a portfolio approach to the property leases to apply an incremental borrowing rate to leases with 
similar lease terms. The lease terms may include options to extend or terminate the lease. The Company recognizes the options to extend 
the lease as part of the right-of-use lease assets and lease liabilities only if it is reasonably certain that the option would be exercised. Lease 
expense for minimum lease payments is recognized on a straight-line basis over the non-cancelable lease term. The Company has elected 
to not separate lease and non-lease components. See “Note 9. Leases” for further disclosure.
Comprehensive Loss 
Comprehensive loss is the change in stockholders’ equity from transactions and other events and circumstances other than those 
resulting from investments by stockholders and distributions to stockholders. The Company’s other comprehensive loss is comprised of 
unrealized gains and losses on investments in available-for-sale securities and foreign currency translation adjustments. 
Research and Development 
Research and development costs are expensed as incurred and consist of salaries and benefits, stock-based compensation expense, 
lab supplies and facility costs, as well as fees paid to other nonemployees and entities that conduct certain research and development 
activities on the Company’s behalf. Amounts incurred in connection with license agreements are also included in research and development 
expense. Nonrefundable advance payments for goods or services to be received in the future for use in research and development activities 
are deferred. The deferred amounts are expensed as the related goods are delivered or the services are performed. 
Stock-Based Compensation 
Stock-based awards issued to employees, including stock options, performance stock options, or PSOs, restricted stock units, or 
RSUs, and performance stock units, or PSUs are recorded at fair value as of the grant date and recognized as expense on a straight-line 
basis over the employee’s requisite service period (generally the vesting period). PSOs and PSUs vest only if certain specified criteria are 
achieved and the employees’ continued service requirements are met; therefore, the expense recognition occurs when the likelihood of the 
PSOs and PSUs being earned is deemed probable. Stock compensation expense on awards expected to vest are recognized net of 
estimated forfeitures. 
Income Taxes 
The Company uses the liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are 
determined based on the differences between the financial reporting and the tax bases of assets and liabilities and are measured using the 
enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company must then assess the likelihood 
that the resulting deferred tax assets will be realized. A valuation allowance is provided when it is more likely than not that some portion or all 
of a deferred tax asset will not be realized. Due to the Company’s lack of earnings history, the net deferred tax assets have been fully offset 
by a valuation allowance. 
In conjunction with the acquisition of Dimension Therapeutics, Inc., or Dimension, a deferred tax liability was recorded reflecting the tax 
impact of the difference between the book basis and tax basis of acquired IPR&D. Such deferred income tax liability is not used to offset 
deferred tax assets when analyzing the Company’s valuation allowance as the acquired IPR&D is considered to have an indefinite life until 
the Company completes or abandons development of the acquired IPR&D.
F-14
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The Company recognizes benefits of uncertain tax positions if it is more likely than not that such positions will be sustained upon 
examination based solely on their technical merits, as the largest amount of benefit that is more likely than not to be realized upon the 
ultimate settlement. The Company’s policy is to recognize interest and penalties related to the underpayment of income taxes as a 
component of income tax expense or benefit. To date, there have been no interest or penalties charged in relation to the unrecognized tax 
benefits. 
Foreign Currency
Assets and liabilities of non-U.S. subsidiaries that operate in a local currency environment, where the local currency is the functional 
currency, are translated to U.S. dollars at exchange rates in effect at the balance sheet date, with the resulting translation adjustments 
directly recorded to a separate component of accumulated other comprehensive loss. Income and expense accounts are translated at 
average exchange rates for the period. Transactions which are not in the functional currency of the entity are remeasured into the functional 
currency and gains or losses resulting from the remeasurement recorded in other income (expense). 
Net Loss per Share 
Basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding 
during the period, without consideration for common stock equivalents. Diluted net loss per share is the same as basic net loss per share, 
since the effects of potentially dilutive securities are antidilutive. In periods when we have incurred a net loss, options and warrants to 
purchase common stock are considered common stock equivalents, but have been excluded from the calculation of diluted net loss per 
share, as their effect is antidilutive.
3.
Fair Value Measurements 
Financial assets and liabilities are recorded at fair value. The carrying amount of certain financial instruments, including cash and cash 
equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities. 
Assets and liabilities recorded at fair value on a recurring basis in the balance sheets are categorized based upon the level of judgment 
associated with the inputs used to measure their fair values. Fair value is defined as the exchange price that would be received for an asset 
or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly 
transaction between market participants on the measurement date. The authoritative guidance on fair value measurements establishes a 
three-tier fair value hierarchy for disclosure of fair value measurements as follows: 
Level 1—Inputs are unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date; 
Level 2—Inputs are observable, unadjusted quoted prices in active markets for similar assets or liabilities, unadjusted quoted prices for 
identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by 
observable market data for substantially the full term of the related assets or liabilities; and 
Level 3—Unobservable inputs that are significant to the measurement of the fair value of the assets or liabilities that are supported by 
little or no market data. 
The Company’s financial instruments consist of Level 1, Level 2, and Level 3 assets. Where quoted prices are available in an active 
market, securities are classified as Level 1. Money market funds and U.S. Government treasury bills are classified as Level 1. Level 2 assets 
consist primarily of corporate bonds, asset backed securities, commercial paper, U.S. Government Treasury and agency securities, and debt 
securities in government-sponsored entities based upon quoted market prices for similar movements in active markets, quoted prices for 
identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant inputs are 
observable in the market or can be corroborated by observable market data for substantially the full term of the assets. Where applicable 
these models project future cash flows and discount the future amounts to a present value using market-based observable inputs obtained 
from various third-party data providers, including but not limited to, benchmark yields, interest rate curves, reported trades, broker/dealer 
quotes and reference data.
The Company determines the fair value of its equity investments in Arcturus Therapeutics Holdings Inc., or Arcturus, and Solid 
Biosciences, Inc., or Solid, by using the quoted market prices, which are Level 1 fair value measurements. 
The following tables set forth the fair value of the Company’s financial assets remeasured on a recurring basis based on the three-tier 
fair value hierarchy (in thousands): 
F-15
 
  
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Financial Assets:
Money market funds
Certificates of deposits and time deposits
Corporate bonds
Commercial paper
Asset-backed securities
U.S. Government Treasury and agency securities
Debt securities in government-sponsored entities
Investment in Solid common stock
Other
Total
Financial Assets:
Money market funds
Certificates of deposits and time deposits
Corporate bonds
Commercial paper
Asset-backed securities
U.S. Government Treasury and agency securities
Debt securities in government-sponsored entities
Investments in Arcturus and Solid common stock
Other
Total
Level 1
Level 2
Level 3
Total
December 31, 2022
102,847  
—  
—  
—  
—  
27,645  
—  
2,807  
—  
133,299  
  $
  $
—  
25,972  
427,598  
135,393  
11,980  
129,345  
15,855  
—  
4,575  
750,718  
  $
  $
—  
—  
—  
—  
—  
—  
—  
—  
—  
—  
  $
  $
102,847  
25,972  
427,598  
135,393  
11,980  
156,990  
15,855  
2,807  
4,575  
884,017  
Level 1
Level 2
Level 3
Total
December 31, 2021
266,765  
—  
—  
—  
—  
—  
—  
32,200  
—  
298,965  
  $
  $
—  
16,000  
349,691  
187,624  
41,245  
87,435  
19,549  
—  
942  
702,486  
  $
  $
—  
—  
—  
—  
—  
—  
—  
—  
—  
—  
  $
266,765  
16,000  
349,691  
187,624  
41,245  
87,435  
19,549  
32,200  
942  
  $ 1,001,451  
$
$
$
$
4.
Balance Sheet Components 
Cash Equivalents and Marketable Debt Securities
The fair values of cash equivalents and marketable debt securities classified as available-for-sale securities consisted of the following 
(in thousands):
Money market funds
Certificates of deposit and time deposits
Corporate bonds
Commercial paper
Asset-backed securities
U.S. Government Treasury and agency securities
Debt securities in government-sponsored entities
Total
Amortized
Cost
$
$
102,847  
25,972  
432,211  
135,393  
12,002  
157,933  
16,005  
882,363  
  $
  $
F-16
December 31, 2022
Gross Unrealized
Gains
Losses
Estimated 
Fair Value  
102,847  
25,972  
427,598  
135,393  
11,980  
156,990  
15,855  
876,635  
  $
—  
—  
(4,700 )    
—  
(22 )    
(1,263 )    
(150 )    
(6,135 )   $
—  
—  
87  
—  
—  
320  
—  
407  
  $
  $
 
 
 
 
   
   
   
 
   
 
   
 
     
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
 
 
 
   
   
   
 
   
 
   
 
     
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
 
 
 
 
 
   
     
 
 
   
   
   
 
   
   
   
 
   
   
 
   
   
   
 
   
   
 
   
   
 
   
   
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
December 31, 2021
Gross Unrealized
Amortized 
Cost
Gains
Losses
Money market funds
Certificates of deposit and time deposits
Corporate bonds
Commercial paper
Asset-backed securities
U.S. Government Treasury and agency securities
Debt securities in government-sponsored entities
Total
$
$
266,765  
16,000  
350,667  
187,624  
41,282  
87,642  
19,612  
969,592  
  $
  $
—  
—  
3  
—  
1  
1  
—  
5  
  $
  $
Estimated 
Fair Value  
266,765  
16,000  
349,691  
187,624  
41,245  
87,435  
19,549  
968,309  
  $
—  
—  
(979 )    
—  
(38 )    
(208 )    
(63 )    
(1,288 )   $
At December 31, 2022, the remaining contractual maturities of available-for-sale securities were less than three years. There have 
been no significant realized gains or losses on available-for-sale securities for the periods presented. The unrealized losses on the 
Company’s investments in marketable debt securities were caused by increases in market yields on these investments. The contractual 
terms of these investments do not permit the issuers to settle the securities at a price less than the par value. Accordingly, it is expected that 
the securities will not be settled at a price less than the amortized cost basis of these investments. The Company does not intend to sell the 
investments and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized cost 
basis.
Inventory
Inventory consists of the following (in thousands): 
Work-in-process
Finished goods
Total
Property, Plant, and Equipment, net 
Property, plant, and equipment, net consists of the following (in thousands):
Leasehold improvements
Research and development equipment
Furniture and office equipment
Computer equipment and software
Land
Construction-in-progress
Other
Property, plant, and equipment, gross
Less: accumulated depreciation
Property, plant, and equipment, net
December 31,
2022
2021
  $
  $
17,486     $
9,280      
26,766     $
10,504  
5,727  
16,231  
December 31,
2022
2021
43,941     $
50,291      
5,540      
13,876      
16,619      
189,448      
3,392      
323,107      
(63,381 )    
259,726     $
44,081  
38,661  
5,413  
10,238  
15,487  
76,849  
556  
191,285  
(50,038 )
141,247  
  $
  $
Depreciation expense for the years ended December 31, 2022, 2021, and 2020 was $15.0 million, $12.9 million and $12.1 million, 
respectively. Amortization of leasehold improvements and software is included in depreciation expense. The construction-in-progress 
balance primarily relates to the construction costs for the gene therapy manufacturing plant in Bedford, Massachusetts.
F-17
 
 
 
 
 
 
 
 
   
     
 
 
   
   
   
 
   
   
   
 
   
   
 
   
   
   
 
   
   
 
   
   
 
   
   
 
  
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
   
   
   
   
   
   
   
   
  
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Accrued Liabilities 
Accrued liabilities consists of the following (in thousands): 
Research, clinical study, and manufacturing expenses
Payroll and related expenses
Other
Total
December 31,
2022
2021
  $
  $
73,558     $
78,938    
52,182    
204,678     $
40,880  
62,591  
42,084  
145,555  
5.
Intangible Assets, net 
Indefinite-lived Intangibles
The Company has IPR&D assets of $129.0 million as of December 31, 2022 and 2021. IPR&D assets represent the fair value of 
acquired programs to develop an AAV gene therapy for OTC deficiency and to develop an AAV gene therapy for glycogen storage disease 
type Ia. The fair value of IPR&D assets acquired was determined based on the discounted present value of each research project’s projected 
cash flows using an income approach, including the application of probability factors related to the likelihood of success of the program 
reaching final development and commercialization. Additionally, the projections consider the relevant market sizes and growth factors, 
estimated future cash flows from product sales resulting from completed products and in-process projects and timing and costs to complete 
the in-process projects. The rates utilized to discount the net cash flows to their present value are commensurate with the stage of 
development of the projects and uncertainties in the economic estimates used in the projections. IPR&D assets are considered to be 
indefinite-life until the completion or abandonment of the associated research and development efforts.
Finite-lived Intangibles
Subsequent to the FDA approval of Dojolvi for the treatment of LC-FAOD in 2020, the Company recorded $4.8 million for the 
attainment of various development and commercial milestones as finite-lived intangible assets which are amortized over a weighted-average 
useful life of 5.7 years.
In January 2022, the Company announced a collaboration with Regeneron to commercialize Evkeeza for HoFH outside of the U.S. 
Upon closing of the transaction in January 2022, the Company paid Regeneron a $30.0 million upfront payment. As the upfront payment was 
related to the Company’s usage of intellectual property related to Evkeeza for HoFH, the upfront payment was recorded as an intangible 
asset, which is amortized over its useful life of 10.5 years.
The Company's intangible assets were as follows:
Indefinite-lived intangibles
Finite-lived intangibles
Total intangible assets
Indefinite-lived intangibles
Finite-lived intangibles
Total intangible assets
December 31, 2022
Gross Carrying 
Amount
Weighted-
Average Life 
(Years)
Accumulated 
Amortization
Net Carrying 
Amount
129,000    
34,775    
163,775    
—     $
9.9     $
—     $
—     $
(3,670 )   $
(3,670 )   $
129,000  
31,105  
160,105  
December 31, 2021
Gross Carrying 
Amount
Weighted-
Average Life 
(Years)
Accumulated 
Amortization
Net Carrying 
Amount
129,000    
2,275    
131,275    
—     $
7.0     $
—     $
—     $
(487 )   $
(487 )   $
129,000  
1,788  
130,788  
$
$
$
$
The Company recorded costs of sales of $3.2 million, $0.3 million and $0.2 million for the years ended December 31, 2022, 2021, and 
2020, respectively, related to the amortization of the intangible assets. 
F-18
 
  
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The expected amortization of the intangible assets, as of December 31, 2022, for each of the next five years and thereafter is as 
follows:
2023
2024
2025
2026
2027
Thereafter
Total
6.
Revenue
$
$
3,738  
3,738  
3,738  
3,738  
3,297  
12,856  
31,105  
The following table disaggregates total revenues from external customers by collaboration and license revenue and product sales (in 
thousands):
Collaboration and license revenue:
Crysvita collaboration revenue in profit-share territory
Crysvita royalty revenue in European territory
Daiichi Sankyo
Total collaboration and license revenue
Product sales:
Crysvita
Mepsevii
Dojolvi
Total product sales
Crysvita non-cash collaboration royalty revenue
Total revenues
Year Ended December 31,
2021
2022
2020
$
$
215,024  
—  
7,686  
222,710  
42,678  
20,637  
55,612  
118,927  
21,692  
363,329  
  $
  $
171,198     $
244      
84,996      
256,438      
21,422      
16,035      
39,560      
77,017      
17,951      
351,406     $
128,597  
1,498  
89,220  
219,315  
10,350  
15,342  
13,028  
38,720  
12,995  
271,030  
The following table disaggregates total revenues based on geographic location (in thousands): 
North America
Europe
Latin America
Japan
Total revenues
Year Ended December 31,
2021
2022
2020
$
$
281,088  
36,369  
44,711  
1,161  
363,329  
  $
  $
301,110     $
26,660      
23,636      
—      
351,406     $
237,666  
21,318  
12,046  
—  
271,030  
The following table presents the activity and ending balances for sales-related accruals and allowances (in thousands):
Year Ended December 31,
2021
2022
2020
Balance of product sales reserve at beginning of year
Provisions
Payments
Adjustments
Balance of product sales reserve at end of year
$
$
7,181  
13,525  
(9,613 )
394  
11,487  
  $
  $
F-19
  $
3,913  
9,586  
(6,120 )    
(198 )    
  $
7,181  
1,818  
5,763  
(2,785 )
(883 )
3,913  
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
   
 
 
 
   
 
   
 
   
 
 
 
 
   
 
 
 
   
 
   
 
   
 
   
 
   
 
 
 
   
   
 
 
   
 
   
 
   
 
 
 
   
   
 
 
   
   
 
   
 
   
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The following table presents changes in the contract assets (liabilities) for the years ended December 31, 2022 and 2021 (in 
thousands):
Balance of contract liabilities at beginning of period
Additions
Deductions
Balance of contract liabilities at end of period, net
Year Ended December 31,
2022
2021
$
$
9,076  
89  
(7,686 )
1,479  
  $
  $
66,568  
27,504  
(84,996 )
9,076  
See Note 8 for additional details on contract liabilities activities. 
The Company’s largest accounts receivable balance was from a collaboration partner and was 68% and 71% of the total accounts 
receivable balance as of December 31, 2022 and 2021, respectively.
7.
GeneTx Acquisition
In August 2019, the Company entered into a Program Agreement and a Unitholder Option Agreement with GeneTx Biotherapeutics 
LLC, or GeneTx, to collaborate on the development of GeneTx’s GTX-102, an ASO for the treatment of Angelman syndrome. Pursuant to the 
terms of the Unitholder Option Agreement, the Company made an upfront payment of $20.0 million for an exclusive option to acquire 
GeneTx, which was exercisable any time prior to 30 days following FDA acceptance of the IND for GTX-102. Pursuant to the agreement, 
upon acceptance of the IND, which occurred in January 2020, the Company elected to extend the option period by paying an option 
extension payment of $25.0 million during the quarter ended March 31, 2020, which was recorded as an in-process research and 
development expense. In April 2022, the parties entered into an amendment to the Unitholder Option Agreement, or the Amendment, which 
provided the Company with an additional, earlier option to acquire GeneTx for an option exercise price of $75.0 million based on the earlier of 
receipt of interim data in the Phase 1/2 study or a specified date, such option, the Interim Option.
During the exclusive option period, GeneTx was responsible for conducting the program based on the development plan agreed upon 
between the parties and, subject to the terms in the Program Agreement, had the decision-making authority on all matters in connection with 
the research, development, manufacturing and regulatory activities with respect to the Program.
In July 2022, the Company exercised the Interim Option to acquire GeneTx and entered into a Unit Purchase Agreement, or the 
Purchase Agreement, pursuant to which the Company purchased all the outstanding units of GeneTx. In accordance with the terms of the 
Purchase Agreement, the Company paid the option exercise price of $75.0 million and an additional $15.6 million to acquire the outstanding 
cash of GeneTx, and adjustments for working capital and transaction expenses of $0.6 million, for a total purchase consideration of $91.2 
million. Additionally, the Company may make payments of up to $190.0 million upon the achievement of certain milestones, including up to 
$30.0 million in milestone payments upon achievement of the earlier of initiation of a Phase 3 clinical study or product approvals in Canada 
and the U.K., up to $85.0 million in additional regulatory approval milestones for the achievement of U.S. and EU product approvals, and up 
to $75.0 million in commercial milestone payments based on annual worldwide net product sales. In addition, the Company will also pay 
tiered mid- to high single-digit percentage royalties based on licensed product annual net sales. If the Company receives and resells an FDA 
priority review voucher, or PRV, in connection with a new drug application approval, GeneTx is entitled to receive a portion of proceeds from 
the sale or a cash payment from the Company if the Company choses to retain the PRV.
The transaction was accounted as an asset acquisition, as substantially all of the fair value of the gross assets acquired was 
concentrated in a single identifiable in-process research and development intangible asset. Prior to the achievement of certain development 
and regulatory milestones, the acquired in-process research and development intangible asset has not yet reached technological feasibility 
and has no alternative future use. Accordingly, the Company recorded the acquisition price of $75.0 million, net of cash and working capital 
acquired, as in-process research and development expense during the year ended December 31, 2022.
8.
License and Research Agreements   
Kyowa Kirin Co., Ltd.
In August 2013, the Company entered into a collaboration and license agreement with Kyowa Kirin Co., Ltd., or KKC (formerly Kyowa 
Hakko Kirin Co., Ltd. or KHK). Under the terms of this collaboration and license agreement, as amended, the Company and KKC collaborate 
on the development and commercialization of Crysvita in the field of orphan diseases in the U.S. and Canada, or the profit-share territory, 
and in the European Union, United Kingdom, and Switzerland, or the European territory, and the Company has 
F-20
 
 
 
 
 
 
 
 
   
 
   
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
the right to develop and commercialize such products in the field of orphan diseases in Mexico and Central and South America, or Latin 
America.
Development Activities
In the field of orphan diseases, and except for ongoing studies being conducted by KKC, the Company is the lead party for 
development activities in the profit-share territory and in the European territory until the applicable transition date. The Company shares the 
costs for development activities in the profit-share territory and the European territory conducted pursuant to the development plan before the 
applicable transition date equally with KKC. In April 2023, which is the transition date for the profit-share territory, KKC will become the lead 
party and be responsible for the costs of the development activities. However, the Company will continue to share the costs of the studies 
commenced prior to the applicable transition date equally with KKC.
The collaboration and license agreements are within the scope of ASC 808, which provides guidance on the presentation and 
disclosure of collaborative arrangements.
Collaboration Revenue Related to Sales in the Profit-share Territory
The Company and KKC share commercial responsibilities and profits in the profit-share territory until April 2023. Under the 
collaboration agreement, KKC manufactures and supplies Crysvita for commercial use in the profit-share territory and charges the Company 
a transfer price of 35% of net sales through December 31, 2022, and 30% thereafter. The remaining profit or loss after supply costs from 
commercializing products in the profit-share territory are shared between the Company and KKC on a 50/50 basis until April 2023. In April 
2023, commercialization responsibilities for Crysvita in the profit-share territory will transition to KKC and KKC will be responsible for the 
commercialization of Crysvita in the territory at and after April 2023. Thereafter, the Company will be entitled to receive a tiered double-digit 
revenue share from the mid-20% range up to a maximum rate of 30%.
In September 2022, the Company entered into an amendment to the collaboration agreement which clarified the scope of increased 
participation by KKC in support of the Company’s commercial activities prior to April 2023 and granted the Company the right to continue to 
support KKC in commercial field activities in the U.S. through April 2024, subject to the limitations and conditions set forth in the amendment. 
As a result, KKC will continue to support the Company’s commercial field and marketing efforts through a cost share arrangement through 
April 2024, subject to the limits and conditions set forth in the amendment. After April 2024, the Company’s rights to promote Crysvita in the 
U.S. will be limited to medical geneticists and the Company will solely bear its expenses related to the promotion of Crysvita in the profit-
share territory. 
As KKC is the principal in the sale transaction with the customer, the Company recognizes a pro-rata share of collaboration revenue, 
net of transfer pricing, in the period the sale occurs. The Company concluded that its portion of KKC’s sales in the profit-share territory is 
analogous to a royalty and therefore recorded its share as collaboration revenue, similar to a royalty. 
In July 2022, the Company sold to OMERS its right to receive 30% of the future royalty payments due to the Company based on net 
sales of Crysvita in the U.S. and Canada, subject to a cap, beginning in April 2023, as further described in Note 10.
Royalty Revenue Related to Sales in the European Territory
KKC has the commercial responsibility for Crysvita in the European territory. In December 2019, the Company sold its right to receive 
royalty payments based on sales in the European territory to Royalty Pharma, effective January 1, 2020, as further described in “Note 10. 
Liabilities for Sales of Future Royalties.” Prior to the Company’s sale of the royalty, the Company received a royalty of up to 10% on net sales 
in the European territory, which was recognized as the underlying sales occur. Beginning in 2020, the Company records the royalty revenue 
as non-cash royalty revenues. During the years ended December 31, 2021 and 2020, there was a change in estimate of the revenue 
reserves related to sales made prior to January 1, 2020, as a result of which, the Company recorded $0.2 million and $1.5 million, 
respectively, as royalty revenue in the European territory.
The Company’s share of collaboration and royalty revenue related to Crysvita was as follows (in thousands):
Company's share of revenue in profit-share territory
Royalty revenue in European territory
Non-cash royalty revenue in European territory
Total
F-21
Year Ended December 31,
2021
2022
2020
$
$
215,024  
—  
21,692  
236,716  
  $
  $
171,198     $
244      
17,951      
189,393     $
128,597  
1,498  
12,995  
143,090  
 
 
 
 
   
   
 
 
   
 
   
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Product Revenue Related to Sales in Other Territories
The Company is responsible for commercializing Crysvita in Latin America and Turkey. The Company is considered the principal in 
these territories as the Company controls the product before it is transferred to the customer. Accordingly, the Company records revenue on 
a gross basis related to the sale of Crysvita once the product is delivered and the risk and title of the product is transferred to the distributor. 
The Company recorded product sales of $42.7 million, $21.4 million, and $10.4 million for the years ended December 31, 2022, 2021, and 
2020, respectively, net of estimated product returns and other deductions. KKC has the option to assume responsibility for commercialization 
efforts in Turkey from the Company, after a certain minimum period.
Under the collaboration agreement, KKC manufactures and supplies Crysvita, which is purchased by the Company for sales in its 
territories and is based on 35% of the net sales through December 31, 2022 and 30% thereafter. The Company also pays to KKC a low 
single-digit royalty on net sales in Latin America. 
Cost Sharing Payments
Under the collaboration agreement, KKC and the Company share certain development and commercialization costs. As a result, the 
Company was reimbursed for these costs and operating expenses were reduced as follows (in thousands):
Research and development
Selling, general and administrative
Total
Collaboration Receivable and Payable
Year Ended December 31,
2021
2022
2020
$
$
15,974  
37,217  
53,191  
  $
  $
21,657  
32,629  
54,286  
  $
  $
21,476  
25,186  
46,662  
The Company had accounts receivable from KKC in the amount of $27.5 million and $20.2 million from profit-share revenue and 
royalties and other receivables recorded in prepaid expenses and other current assets of $6.4 million and $16.0 million and accrued liabilities 
of $3.1 million and $2.3 million from commercial and development activity reimbursements, as of December 31, 2022 and 2021, respectively.
Saint Louis University
In November 2010, the Company entered into a license agreement with Saint Louis University, or SLU. Under the terms of this license 
agreement, SLU granted the Company an exclusive worldwide license to make, have made, use, import, offer for sale, and sell therapeutics 
related to SLU’s beta-glucuronidase product for use in the treatment of human diseases. 
The Company made a milestone payment of $0.1 million upon approval of Mepsevii for treatment of MPS 7. The Company is required 
to pay to SLU a low single-digit royalty on net sales of the licensed products in any country or region, upon reaching a certain level of 
cumulative worldwide sales of the product. 
Baylor Research Institute 
In September 2012, the Company entered into a license agreement with Baylor Research Institute, or BRI. Under the terms of this 
license agreement, as amended, BRI exclusively licensed to the Company its territories for certain intellectual property related to Dojolvi 
(triheptanoin) for the treatment of LC-FAOD. 
For the years ended December 31, 2022, 2021, and 2020, the Company recorded $2.5 million, nil and $2.0 million, respectively, for the 
attainment of various development and commercial milestones as finite-lived intangible assets. The Company is obligated to make additional 
future payments of up to $7.5 million contingent upon attainment of various development and commercial milestones. Additionally, the 
Company is paying BRI a mid- single-digit royalty on net sales of the licensed product in the licensed territories. 
REGENXBIO, Inc.
The Company has a license agreement with REGENXBIO, Inc., or REGENX, for an exclusive, sublicensable, worldwide commercial 
license under certain intellectual property for preclinical and clinical research and development, and commercialization of drug therapies 
using REGENX's licensed patents for the treatment of hemophilia A, OTC deficiency, and GSD1a. The Company will pay an annual fee and 
certain milestone fees per disease indication, low to mid- single-digit royalty percentages on net sales of licensed products, and milestone 
and sublicense fees owed by REGENX to its licensors, contingent upon the attainment of certain development activities as outlined in the 
agreement.
F-22
 
 
 
 
   
   
 
 
   
   
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The Company also has an option and license agreement with REGENX under which the Company has an exclusive, sublicensable, 
worldwide license to make, have made, use, import, sell, and offer for sale licensed products to treat Wilson disease and CDKL5 deficiency. 
For each disease indication, the Company is obligated to pay an annual maintenance fee of $0.1 million and up to $9.0 million upon 
achievement of various milestones, as well as mid- to high single-digit royalties on net sales of licensed products and mid- single-digit to low 
double-digit percentage sublicenses fees, if any. 
In March 2020, the Company entered into a license agreement with REGENX, for an exclusive, sublicensable, worldwide license to 
REGENX’s NAV AAV8 and AAV9 vectors for the development and commercialization of gene therapy treatments for a rare metabolic 
disorder. In return for these rights, the Company made an upfront payment of $7.0 million, which was recorded as an in-process research 
and development expense during the year ended December 31, 2020. The Company will pay certain annual fees of $0.1 million, milestone 
payments of up to $14.0 million, and royalties on any net sales of products incorporating the licensed intellectual property that range from a 
high single-digit to low double-digit royalty. 
Bayer HealthCare LLC
The Company previously had a collaboration and license agreement with Bayer Healthcare LLC, or Bayer, to research, develop and 
commercialize AAV gene therapy products for the treatment of hemophilia A, or DTX 201. Under this agreement, Bayer had been granted an 
exclusive license to develop and commercialize one or more novel gene therapies for hemophilia A.
In October 2022, the Collaboration and License Agreement for DTX201 with Bayer was terminated and all licensed rights to DTX201 
have reverted back to the Company. The Company also obtained rights to all necessary data and information to further develop DTX201 or 
another hemophilia A program through a royalty-free, worldwide, sublicensable, perpetual license.
University of Pennsylvania
The Company has a research, collaboration, and license agreement with University of Pennsylvania School of Medicine, or Penn, 
which provides the terms for the Company and Penn to collaborate with respect to the pre-clinical development of gene therapy products for 
the treatment of certain indications. Under the agreement, Penn granted the Company an exclusive, worldwide license to certain patent rights 
arising out of the research program, subject to certain retained rights, and a non-exclusive, worldwide license to certain Penn intellectual 
property, in each case to research, develop, make, have made, use, sell, offer for sale, commercialize and import licensed products in each 
indication for the term of the agreement. The Company will fund the cost of the research program in accordance with a mutually agreed-upon 
research budget and will be responsible for clinical development, manufacturing and commercialization of each indication. The Company 
may be obligated to make milestone payments of up to $5.0 million for each indication, if certain development milestones are achieved over 
time. The Company is also obligated to make milestone payments of up to $25.0 million per approved product if certain commercial 
milestones are achieved, as well as low to mid- single-digit royalties on net sales of each licensed product.
Arcturus Therapeutics Holdings Inc.
In October 2015, the Company entered into a Research Collaboration and License Agreement with Arcturus Therapeutics Holdings 
Inc.,  or  Arcturus,  to  collaborate  on  the  research  and  development  of  therapies  for  select  rare  diseases.  Arcturus  was  responsible  for 
conducting certain research services, funded by the Company, and the Company was responsible for development and commercialization 
costs. 
On  a  product-by-product  basis,  the  Company  is  obligated  to  make  development  and  regulatory  milestone  payments  of  up  to  $24.5 
million,  and  commercial  milestone  payments  of  up  to  $45.0  million  if  certain  milestones  are  achieved.  For  the  year  ended  December  31, 
2021, the Company achieved a $1.0 million development milestone related to UX053, which was paid with a corresponding credit received 
from  Arcturus  for  prior  research  and  collaboration  activities.  The  Company  is  also  obligated  to  pay  Arcturus  royalties  on  any  net  sales  of 
products incorporating the licensed intellectual property that may range from a mid- single-digit to low double-digit percentage. Pursuant to 
the  agreement,  the  Company  incurred  nil, nil,  and  $0.4  million  for  the  years  ended  December  31,  2022,  2021,  and  2020,  respectively,  in 
research and development expense for the funding of certain research services received from Arcturus.
In  June  2019,  the  Company  entered  into  an  Equity  Purchase  Agreement  and  an  amendment  to  the  Research  Collaboration  and 
License Agreement, or License Agreement, to expand the field of use and increase the number of disease targets to include mRNA, DNA 
and siRNA therapeutics for up to 12 rare diseases. Pursuant to the agreements, the Company paid $6.0 million in cash upfront to Arcturus 
and  purchased  2,400,000  shares  of  Arcturus’  common  stock  at  a  stated  value  of  $10.00  per  share,  resulting  in  a  total  of  $30.0  million  of 
consideration paid at the close of the transaction. As a result, the Company received expanded license rights under the License Agreement, 
Arcturus common stock, and an option to purchase an additional 600,000 shares of Arcturus’ common stock at 
F-23
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
$16.00 per share. In May 2020, the Company exercised its option to purchase 600,000 shares of Arcturus common stock for a total purchase 
price of $9.6 million.
During the years ended December 31, 2022 and 2021, the Company sold 500,000 shares and 1,700,000 shares of Arcturus common 
stock,  at  a  weighted-average  price  of  $20.39  and  $47.44,  respectively.  As  of  December  31,  2022  and  2021,  the  Company  held  nil  and 
500,000 shares, respectively, of Arcturus common stock.
The Company’s investment in Arcturus was accounted at fair value, as the fair value was readily determinable. All remaining shares of 
Arcturus held by the Company were sold during the year ended December 31, 2022.
The changes in the fair value of the Company’s equity investment in Arcturus were as follows (in thousands):
December 31, 2020
Change in fair value
Sale of shares
December 31, 2021
Change in fair value
Sale of shares
December 31, 2022
Arcturus Common Stock
95,436  
2,912  
(79,843 )
18,505  
(8,411 )
(10,094 )
—  
$
$
Daiichi Sankyo
In March 2020, the Company executed a License and Technology Access Agreement, or the License Agreement, with Daiichi Sankyo 
Co., Ltd., or Daiichi Sankyo. Pursuant to the License Agreement, the Company granted Daiichi Sankyo a non-exclusive license to intellectual 
property, including know-how and patent applications, with respect to its Pinnacle PCLTM producer cell line platform, or Pinnacle PCL 
Platform, and HEK293 transient transfection manufacturing technology platforms for AAV-based gene therapy products. The Company 
retains the exclusive right to use the manufacturing technology for its current target indications and additional indications identified now and 
in the future. The Company will provide certain technical assistance and technology transfer services during the technology transfer period of 
three years to enable Daiichi Sankyo to use the technologies for its internal gene therapy programs. Daiichi Sankyo has an option to extend 
the technology transfer period including know-how improvements by two additional one-year periods by paying a fixed amount for each 
additional year. Daiichi Sankyo will be responsible for the manufacturing, development, and commercialization of products manufactured with 
the licensed technology; however, the Company has the option to co-develop and co-commercialize rare disease products at the IND stage. 
The Company may also provide strategic consultation to Daiichi Sankyo on the development of both AAV-based gene therapy products and 
other products for rare diseases. 
Under the terms of the License Agreement, Daiichi Sankyo made an upfront payment of $125.0 million and an additional $25.0 million 
payment upon completion of the technology transfer of the Pinnacle PCL Platform and HEK293 platform. Daiichi Sankyo reimbursed the 
Company for all costs associated with the transfer of the manufacturing technology and will pay single-digit royalties on net sales of products 
manufactured in either system.
The Company also entered into a Stock Purchase Agreement, or SPA, with Daiichi Sankyo, pursuant to which Daiichi Sankyo 
purchased 1,243,913 shares of the Company’s common stock in exchange for $75.0 million in cash during the first quarter of 2020. The fair 
market value of the common stock issued to Daiichi Sankyo was $55.3 million based on the stock price of $44.43 per share on the date of 
issuance, resulting in a $19.7 million premium on the SPA. Daiichi Sankyo is also subject to a three-year standstill and restrictions on sale of 
the shares (subject to customary exceptions or release). 
In June 2020, the Company executed a subsequent license agreement, or the Sublicense Agreement, with Daiichi Sankyo for transfer 
of certain technology in consideration for an upfront payment of $8.0 million and annual maintenance fees, milestone payments, and royalties 
on any net sales of products incorporating the licensed intellectual property. 
The License Agreement, the Sublicense Agreement, and the SPA are being accounted for as one arrangement because they were 
entered into at or near the same time and negotiated in contemplation of one another. The Company evaluated the License Agreement and 
the Sublicense Agreement under ASC 606 and determined that the performance obligations under the agreements are (i) intellectual 
property with respect to its Pinnacle PCL Platform and HEK293 transient transfection manufacturing technology platform together with the 
initial technical assistance and technology transfer services, which was completed in the first quarter of 2022, and (ii) the transfer of any 
know-how and improvements after the completion of the initial technology transfer through the end of the three year technology transfer 
period ending March 2023. 
F-24
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
As of December 31, 2022, the Company has determined that the total transaction price of the License Agreement was $183.3 million 
which was comprised of the $19.7 million premium from the SPA, the $125.0 million upfront payment, the $25.0 million in unconstrained 
milestone payments, $8.0 million from the Sublicense Agreement, and the $5.6 million estimated reimbursement amount for delivering the 
license and technology services. Total revenue recognized under the license agreement through December 31, 2022 was $181.9 million.
The Company allocated the total transaction price to the two performance obligations on a relative stand-alone selling price basis. 
Revenue allocated to the intellectual property and the technology transfer services was recognized over an initial period which was 
completed during the first quarter of 2022.Progress toward complete satisfaction of the individual performance obligation used an input 
measure. Revenue for know-how and improvements after the completion of technology transfer is recognized on a straight-line basis over 
the remaining technology transfer period, which ends in March 2023, as it is expected that Daiichi Sankyo will receive and consume the 
benefits consistently throughout the period. Royalties from commercial sales will be accounted for as revenue upon achievement of such 
sales, assuming all other revenue recognition criteria are met.
The Company recognized $7.7 million, $85.0 million, and $89.2 million respectively, for the years ended December 31, 2022, 2021, 
and 2020 in revenue related to this arrangement. As of December 31, 2022 and 2021, the Company had recorded contract liabilities of $1.5 
million and $9.1 million and an accounts receivable related to the above agreements of nil and $0.1 million, respectively.
Mereo
In December 2020, the Company entered into a License and Collaboration Agreement with Mereo BioPharma 3, or Mereo, to 
collaborate on the development of setrusumab. Under the terms of the agreement, the Company will lead future global development of 
setrusumab in both pediatric and adult patients with OI. The Company was granted an exclusive license to develop and commercialize 
setrusumab in the U.S., Turkey, and the rest of the world, excluding the EEA, U.K., and Switzerland, or the Mereo territory, where Mereo 
retains commercial rights. Each party will be responsible for post-marketing commitments and commercial supply in their respective 
territories.
Upon the closing of the transaction in January 2021, the Company made a payment of $50.0 million to Mereo and will be required to 
make payments of up to $254.0 million upon the achievement of certain clinical, regulatory, and commercial milestones. The Company will 
pay for all global development costs as well as tiered double-digit percentage royalties to Mereo on net sales in the U.S., Turkey, and the rest 
of the world (excluding the Mereo Territory), and Mereo will pay the Company a fixed double-digit percentage royalty on net sales in the 
Mereo Territory.
Although Mereo is a variable interest entity, the Company is not the primary beneficiary as it does not have the power to direct the 
activities that would most significantly impact the economic performance of Mereo. Prior to the achievement of certain development 
milestones, all consideration paid to Mereo represents rights to potential future benefits associated with Mereo’s in-process research and 
development activities, which have not reached technological feasibility and have no alternative future use. Accordingly, for the three months 
ended March 31, 2021, the Company recorded the upfront payment of $50.0 million as in-process research and development expense. 
Regeneron
In January 2022, the Company announced a collaboration with Regeneron Pharmaceuticals, or Regeneron, to commercialize Evkeeza 
for HoFH outside of the U.S. Evkeeza is approved in the U.S., where it is marketed by Regeneron, and in the EU and U.K. as a first-in-class 
therapy for use together with diet and other low-density lipoprotein-cholesterol-lowering therapies to treat adults and adolescents aged 12 
years and older with HoFH. Pursuant to the terms of the agreement, the Company received the rights to develop, commercialize and 
distribute the product for HoFH in countries outside of the U.S. The Company is obligated to pay up to $63.0 million in future milestone 
payments, contingent upon the achievement of certain regulatory and sales milestones. The Company may share in certain costs for global 
trials led by Regeneron and also received the right to opt into other potential indications, including a right to negotiate a separate agreement 
with Regeneron to collaborate on the Regeneron’s investigational antibody for the treatment of fibrodysplasia ossificans progressiva, or FOP, 
which expired in July 2022.
The collaboration agreement is within the scope of ASC 808 which provides guidance on the presentation and disclosure of 
collaborative arrangements. As the Company would be the principal in future sale transactions with the customer, the Company will 
recognize product sales and cost of sales in the period the related sales occur and the related revenue recognition criteria are met. 
F-25
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Under the collaboration agreement, Regeneron will supply the product and will charge the Company a transfer price from the low 20% range 
up to 40% on net sales, which will be recognized as cost of sales in the Company’s Statement of Operations.
Upon the closing of the transaction in January 2022, the Company paid Regeneron a $30.0 million upfront payment. As the upfront 
payment was related to the Company’s usage of intellectual property related to Evkeeza for HoFH, the upfront payment was recorded as an 
intangible asset, which is amortized over its useful life of 10.5 years.
The Company recorded costs of sales of $2.9 million, for the year ended December 31, 2022, related to the amortization of the 
intangible asset. Further, the Company reimbursed Regeneron for certain costs of $7.3 million that was recorded as research and 
development expense for the year ended December 31, 2022. No sales of Evkeeza were recorded for the year ended December 31, 2022.
Abeona
In May 2022, the Company announced an exclusive License Agreement for the AAV gene therapy for UX111 with Abeona for the 
treatment of MPS IIIA. Under the terms of the agreement, the Company assumed responsibility for the UX111 program and in return, Abeona 
is eligible to receive tiered royalties of up to 10% on net sales and commercial milestone payments of up to $30.0 million following regulatory 
approval of the product. Additionally, the Company entered into an Assignment and Assumption Agreement with Abeona to transfer and 
assign to the Company the exclusive license agreement between Nationwide Children’s Hospital, or NCH, and Abeona for certain rights 
related to UX111. Under this agreement, NCH is eligible to receive from the Company up to $1.0 million in development and regulatory 
milestones as well as royalties in the low single-digits of net sales.
The Company is obligated to pay Abeona certain prior development costs and other transition costs related to UX111. Prior to product 
regulatory approval, all consideration paid to Abeona represents rights to potential future benefits associated with Abeona’s in-process 
research and development activities, which have not reached technological feasibility and have no alternative future use. Accordingly, the 
value of the acquired intellectual property rights and clinical inventory as well as prior development costs and transition costs of $3.1 million 
were recorded as research and development expense for the year ended December 31, 2022.
Solid Biosciences, Inc.
In October 2020, the Company entered into a strategic Collaboration and License Agreement with Solid Biosciences Inc., or Solid, and 
received an exclusive license for any pharmaceutical product that expresses Solid’s proprietary microdystrophin construct from AAV8 and 
variants thereof in clade E for use in the treatment of Duchenne muscular dystrophy and other diseases resulting from lack of functional 
dystrophin, including Becker muscular dystrophy. The Company is collaborating to develop products that combine Solid’s differentiated 
microdystrophin construct, the Company’s Pinnacle PCL Platform, and the Company’s AAV8 variants. Solid is providing development support 
and was granted an exclusive option to co-invest in products the Company develops for profit-share participation in certain territories. On a 
product-by-product basis, the Company is obligated to make development milestone payments of up to $25.0 million, regulatory milestone 
payments of up to $65.0 million, and commercial milestone payments of up to $165.0 million, if such milestones are achieved, as well as 
royalties on any net sales of products incorporating the licensed intellectual property that range from a low to mid-double-digit percentage. 
The royalty rate changes to mid- to high double-digit percentage if Solid decides to co-invest in the product.
The Company also entered into a Stock Purchase Agreement and the Investor Agreement with Solid, pursuant to which, the Company 
purchased 7,825,797 shares of Solid’s common stock for an aggregate purchase price of $40.0 million. In October 2022, Solid announced a 
1 for 15 reverse stock split. After the split, the Company holds 521,719 shares in Solid. The Company’s investment in Solid is being 
accounted at fair value, as the fair value is readily determinable. The Company recorded the common stock investment at $26.8 million on 
the transaction date, which was based on the quoted market price on the closing date.
Although Solid is a variable interest entity, the Company is not the primary beneficiary as it does not have the power to direct the 
activities that would most significantly impact the economic performance of Solid. Prior to the achievement of certain development 
milestones, all consideration paid to Solid represents rights to potential future benefits associated with Solid’s in-process research and 
development activities, which have not reached technological feasibility and have no alternative future use. Accordingly, the remaining $13.2 
million of the total $40.0 million paid as consideration was attributed to the license rights obtained and was recorded as in-process research 
and development expense during the year ended December 31, 2020. 
F-26
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The changes in the fair value of the Company’s investment in Solid’s common stock were as follows (in thousands):
December 31, 2020
Change in fair value
December 31, 2021
Change in fair value
December 31, 2022
Solid Common Stock  
59,320  
$
(45,625 )
13,695  
(10,888 )
2,807  
$
9.
Leases
The Company leases office space and research, testing and manufacturing laboratory space in various facilities in Novato and 
Brisbane, California, in Cambridge and Woburn, Massachusetts, and in certain foreign countries, under operating agreements expiring at 
various dates through 2028. Certain lease agreements include options for the Company to extend the lease for multiple renewal periods and 
also provide for annual minimum increases in rent, usually based on a consumer price index or annual minimum increases. None of these 
optional periods have been considered in the determination of the right-of-use lease asset or the lease liability for the leases as the Company 
did not consider it reasonably certain that it would exercise any such options. The Company recognizes lease expense on a straight-line 
basis over the non-cancelable term of its operating leases. The variable lease expense primarily consists of common area maintenance and 
other operating costs.
The components of lease expense were as follows (in thousands):
Year Ended December 31,
2021
2020
2022
Operating lease expense
Variable lease expense
Financing:
    Amortization
    Interest expense
        Total
  $
  $
11,775   $
4,785    
11,209  $
4,142   
343    
37    
16,940   $
310   
58   
15,719  $
10,164  
3,298  
158  
40  
13,660  
Cash paid for amounts included in the measurement of operating lease liabilities for the years ended December 31, 2022, 2021, and 
2020 was $13.1 million, $11.8 million, and $10.3 million, respectively, and was included in net cash used in operating activities in the 
Consolidated Statements of Cash Flows.
The following table summarizes maturities of lease liabilities and the reconciliation of lease liabilities as of December 31, 2022:  
Year Ending December 31,
2023
2024
2025
2026
2027
Thereafter
Total future lease payments
Less: Amount representing interest
Present value of future lease payments
Less: Lease liabilities, current
Lease liabilities, non-current
Operating
Financing
Total
  $
  $
13,244   $
11,372    
6,530    
2,964    
446    
376    
34,932    
(3,522 )  
31,410    
(11,596 )  
19,814   $
187   $
—    
—    
—    
—    
—    
187    
(4 ) 
183    
(183 ) 
—   $
13,431  
11,372  
6,530  
2,964  
446  
376  
35,119  
(3,526 )
31,593  
(11,779 )
19,814  
The table above excludes $23.4 million of legally binding minimum lease payments for a lease that was executed during the year 
ended December 31, 2022, but whose term had not commenced. The Company is also obligated to pay $9.9 million of fit-out costs related to 
this lease.
Lease liabilities are based on the net present value of the remaining lease payments over the remaining lease term. For the years 
ended December 31, 2022 and 2021, the weighted-average remaining operating lease terms were 3.01 years and 3.84 years, respectively, 
the weighted-average remaining financing lease terms were 2.81 years and 3.88 years, respectively, the weighted-average discount rates 
used to determine the lease liability for operating leases were 6.72% and 6.64%, respectively, and the weighted-average discount rates used 
to determine the lease liability for finance leases were 5.13% and 5.44% respectively.
F-27
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
10.
Liabilities for Sales of Future Royalties
In December 2019, the Company entered into a Royalty Purchase Agreement with RPI. Pursuant to the agreement, RPI paid $320.0 
million to the Company in consideration for the right to receive royalty payments effective January 1, 2020, arising from the net sales of 
Crysvita in the EU, the U.K., and Switzerland under the terms of the Company’s Collaboration and License Agreement with KKC dated 
August 29, 2013, as amended, or the KKC Collaboration Agreement. The agreement with RPI will automatically terminate, and the payment 
of royalties to RPI will cease, in the event aggregate royalty payments received by RPI are equal to or greater than $608.0 million prior to 
December 31, 2030, or in the event aggregate royalty payments received by RPI are less than $608.0 million prior to December 31, 2030, or 
when aggregate royalty payments received by RPI are equal to $800.0 million.
In July 2022, the Company entered into a Royalty Purchase Agreement with OMERS. Pursuant to the agreement, OMERS paid $500.0 
million to the Company in consideration for the right to receive 30% of the future royalty payments due to the Company from KKC based on 
net sales of Crysvita in the U.S. and Canada under the terms of the KKC Collaboration Agreement. The calculation of royalty payments to 
OMERS will be based on net sales of Crysvita beginning in April 2023 and will expire upon the earlier of the date on which aggregate 
payments received by OMERS equals $725.0 million or the date the final royalty payment is made to the Company under the KKC 
Collaboration Agreement.
Proceeds from these transactions were recorded as liabilities for sales of future royalties on the Consolidated Balance Sheets. Upon 
inception of the respective arrangements, the Company recorded $320.0 million and $500.0 million, net of transaction costs of $5.8 million 
and $9.1 million for RPI and OMERS, respectively, using the effective interest method over the estimated life of the applicable arrangement. 
In order to determine the amortization of the liabilities, the Company is required to estimate the total amount of future royalty payments to be 
received by the Company and paid to RPI and OMERS, subject to the capped amount, over the life of the arrangements. The excess of 
future estimated royalty payments (subject to the capped amount), over the $314.2 million and $491.0 million, respectively, of net proceeds, 
is recorded as non-cash interest expense over the life of the arrangements. Consequently, the Company estimates an imputed interest on 
the unamortized portion of the liabilities and records interest expense relating to the transactions. The Company records the royalty revenue 
arising from the net sales of Crysvita in the applicable territories as non-cash royalty revenue in the Consolidated Statements of Operations 
over the term of the arrangements.
The Company periodically assesses the expected royalty payments using a combination of historical results, internal projections and 
forecasts from external sources. To the extent such payments are greater or less than the Company’s initial estimates or the timing of such 
payments is materially different than its original estimates, the Company will prospectively adjust the amortization of the liabilities and the 
effective interest rate. The Company’s effective annual interest rate was approximately 9.3% and 8.4%, for RPI and OMERS, respectively, as 
of December 31, 2022.
There are a number of factors that could materially affect the amount and timing of royalty payments from KKC in the applicable 
territories, most of which are not within the Company’s control. Such factors include, but are not limited to, the success of KKC’s sales and 
promotion of Crysvita, changing standards of care, delays or disruptions related to the COVID-19 pandemic, macroeconomic and inflationary 
pressures, the introduction of competing products, pricing for reimbursement in various territories, manufacturing or other delays, intellectual 
property matters, adverse events that result in governmental health authority imposed restrictions on the use of Crysvita, significant changes 
in foreign exchange rates as the royalty payments are made in U.S. dollars, or USD, while significant portions of the underlying sales of 
Crysvita are made in currencies other than USD, and other events or circumstances that could result in reduced royalty payments from sales 
of Crysvita, all of which would result in a reduction of non-cash royalty revenue and the non-cash interest expense over the life of the 
arrangement. Conversely, if sales of Crysvita in the relevant territories are more than expected, the non-cash royalty revenue and the non-
cash interest expense recorded by the Company would be greater over the term of the arrangements.
The following table shows the activity within the liability account (in thousands):
F-28
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Liabilities for Sales of Future Royalties
OMERS
RPI
Total
335,665   $
(17,951 )  
34,072    
351,786    
—    
(21,692 )  
35,095    
365,189   $
—   $
—    
—    
—    
490,950    
—    
19,300    
510,250   $
335,665  
(17,951 )
34,072  
351,786  
490,950  
(21,692 )
54,395  
875,439  
$
$
December 31, 2020
Non-cash collaboration royalty revenue
Non-cash interest expense
December 31, 2021
Net proceeds from sale of future 
   royalties
Non-cash collaboration royalty revenue
Non-cash interest expense
December 31, 2022
11.
Equity
At-the-Market Offerings
In May 2021, the Company entered into an Open Market Sale Agreement with Jefferies LLC, or Jefferies, pursuant to which the 
Company may offer and sell shares of the Company’s common stock having an aggregate offering proceeds up to $350.0 million, from time 
to time, in ATM offerings through Jefferies. As of December 31, 2022, the Company has sold 1,050,372 shares under the arrangement 
resulting in net proceeds of approximately $78.9 million. No shares were sold under the arrangement for the year ended December 31, 2022.
Underwritten Public Offering
In October 2020, the Company completed an underwritten public offering in which 5,111,110 shares of common stock were sold, 
which included 666,666 shares purchased by the underwriters pursuant to an option granted to them in connection with the offering, at a 
public offering price of $90.00 per share. The total proceeds that the Company received from the offering were approximately $435.6 million, 
net of underwriting discounts and commissions.
12.
Stock-Based Awards 
Equity Plan Awards
In 2011, the Company adopted the 2011 Equity Incentive Plan, or the 2011 Plan. The 2011 Plan provides for the granting of stock-
based awards to employees, directors, and consultants under terms and provisions established by the board of directors. In 2014, the 
Company adopted the 2014 Incentive Plan, or the 2014 Plan. The 2014 Plan had 2,250,000 shares of common stock available for future 
issuance at the time of its inception, which included 655,038 shares available under the 2011 Plan, which were transferred to the 2014 Plan 
upon adoption. No further grants subsequent to the IPO were made under the 2011 Plan. The 2014 Plan provides for automatic annual 
increases in shares available for grant, beginning on January 1, 2015 through January 1, 2024. In February 2021, the Company adopted the 
Employment Inducement Plan, or the Inducement Plan, with a maximum of 500,000 shares available for grant under the Inducement Plan. 
Under the terms of the 2014 Plan and Inducement Plan, awards may be granted at an exercise price not less than fair market value. For 
employees holding more than 10% of the voting rights of all classes of stock, the exercise prices for awards must be at least 110% of fair 
market of the common stock on the grant date, as determined by the board of directors. The term of an award granted under the 2014 Plan 
and Inducement Plan may not exceed ten years. Typically, the vesting schedule for option grants to the employees provides that 1/4 of the 
grant vests upon the first anniversary of the date of grant, with the remainder of the shares vesting monthly thereafter at a rate of 1/48 of the 
total shares subject to the option. Typically, the vesting schedule for RSU grants provides that 1/4 of the grant vests upon the annual 
anniversary of the date of grant over the period of four years.
As of December 31, 2022, an aggregate of 14,211,103 shares of common stock have been authorized for issuance under the 2011 
Plan, the 2014 Plan, and the Inducement Plan. 
F-29
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Stock Option Activity
The following table summarizes activity under the Company’s stock option plans and related information:
Options Outstanding
Number of 
Options
Weighted- 
Average 
Exercise 
Price
Weighted-
Average 
Remaining 
Contractual 
Term (Years)  
Aggregate 
Intrinsic 
Value
(In 
thousands)  
112,242  
 $
 $
 $
 $
8,476  
7,658  
8,371  
Outstanding — December 31, 2021
Options granted
Options exercised
Options cancelled
Outstanding — December 31, 2022
Vested and exercisable — December 31, 2022
Vested and expected to vest — December 31, 2022
6,198,205     $
2,293,950      
(130,865 )    
(587,923 )    
7,773,367     $
4,577,580     $
7,471,015     $
75.96    
64.88    
47.70    
84.06    
72.56    
70.89    
72.50    
6.81
6.60
5.14
6.51
The aggregate intrinsic values of options outstanding, vested and exercisable, and vested and expected to vest were calculated as the 
difference between the exercise price of the options and the fair value of the Company’s common stock. The total intrinsic value of options 
exercised during the years ended December 31, 2022, 2021, and 2020 was $2.6 million, $38.3 million, and $56.9 million, respectively. Cash 
received from the exercise of options was $6.2 million, $36.6 million, and $88.1 million for the years ended December 31, 2022, 2021, and 
2020, respectively.
The weighted-average estimated fair value of stock options granted was $34.77, $70.84, and $35.22 per share of the Company’s 
common stock during the years ended December 31, 2022, 2021, and 2020, respectively. The total estimated grant date fair value of options 
vested during the years ended December 31, 2022, 2021, and 2020 was $58.7 million, $48.1 million, and $45.4 million, respectively.
Performance Stock Options
The following table summarizes activity under the Company’s Performance Stock Option, or PSO, plans and related information:
PSOs Outstanding
Outstanding — December 31, 2021
PSOs granted
PSOs cancelled
Outstanding — December 31, 2022
Vested and exercisable — December 31, 2022
Vested and expected to vest — December 31, 2022
Number of 
Options
—    $
1,827,449     
(202,850 )   
1,624,599    $
-    $
1,081,597    $
Weighted-
Average 
Remaining 
Contractual 
Term (Years)    
—    $
Aggregate 
Intrinsic 
Value
Weighted- 
Average 
Exercise 
Price
—     
67.37     
67.37     
67.37     
—     
67.37     
4.14    $
—    $
4.14    $
—  
—  
—  
—  
During the year ended December 31, 2022, PSOs were granted to certain nonexecutive employees. PSOs are subject to vest only if 
specified operational milestones are achieved and the employees’ continued service with the Company. The Company uses the Black-
Scholes method to calculate the fair value at the grant date and is recognizing stock-based compensation expense for the PSOs that are 
expected to vest. Stock-based compensation for PSOs is recognized over the service period, beginning in the period the Company 
determines it is probable that a milestone will be achieved. Forfeitures of PSOs are recognized as they occur. The Company reassesses the 
probability of the performance condition at each reporting period and adjusts the compensation cost based on the probability assessment. As 
of December 31, 2022, certain operational milestones were deemed probable of achievement. The aggregate intrinsic values of PSOs 
outstanding, vested and exercisable, and vested and expected to vest were calculated as the difference between the exercise price of the 
PSOs and the fair value of the Company’s common stock. No PSOs vested or were exercised during the year ended December 31, 2022. 
The weighted-average estimated fair value of PSOs granted was $28.76 during the year ended December 31, 2022. 
F-30
 
  
 
 
 
 
 
   
   
 
 
  
     
     
 
  
  
 
  
 
  
 
  
 
  
 
  
 
  
  
  
 
 
 
 
 
 
 
   
   
 
  
 
 
    
 
 
 
    
 
  
 
 
  
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Restricted Stock Units
The following table summarizes activity under the Company’s Restricted Stock Units, or RSU, plans and related information:
Unvested — December 31, 2021
RSUs granted
RSUs vested
RSUs cancelled
Unvested — December 31, 2022
RSUs Outstanding
Number 
of Shares
Weighted- Average 
Grant Date Fair 
Value
1,672,625     $
1,347,125      
(591,837 )    
(298,760 )    
2,129,153     $
87.48  
63.22  
79.59  
81.84  
75.11  
The fair value of the RSUs is determined on the grant date based on the fair value of the Company’s common stock. The fair value of 
the RSUs is recognized as expense ratably over the vesting period of one to four years. The total grant date fair value of the RSUs vested 
during the years ended December 31, 2022, 2021, and 2020 was $47.1 million, $35.5 million, and $27.2 million, respectively. The aggregate 
intrinsic value of the shares of the RSUs vested during the years ended December 31, 2022, 2021, and 2020 was $37.8 million, $69.9 
million, and $29.5 million, respectively.
Performance Stock Units
The following table summarizes activity under the Company’s Performance Stock Units, or PSUs, from the 2014 Plan and related 
information: 
Unvested — December 31, 2021
PSUs granted
PSUs vested
PSUs cancelled
Unvested — December 31, 2022
PSUs Outstanding
Number 
of Shares
Weighted- Average 
Grant Date Fair 
Value
93,892     $
166,730      
(28,990 )    
(22,402 )    
209,230     $
123.46  
75.90  
56.08  
93.61  
98.09  
The fair value of the PSUs is determined on the grant date based on the fair value of the Company’s common stock, except for certain 
PSUs with a market vesting condition, for which fair value is estimated using a Monte Carlo simulation model. PSUs are subject to vest only if 
certain specified criteria are achieved and the employees’ continued service with the Company after achievement of the specified criteria. For 
certain PSUs, the number of PSUs that may vest are also subject to the achievement of certain specified criteria, including both performance 
conditions and market conditions. As of December 31, 2022, the specified criteria were deemed probable of achievement or already 
achieved. Stock-based compensation for PSUs is recognized over the service period beginning in the period the Company determines it is 
probable that the performance criteria will be achieved. The total grant date fair value of the PSUs vested during the years ended December 
31, 2022, 2021, and 2020 was $1.6 million, $9.2 million, and $10.3 million, respectively, with an aggregate intrinsic value of the shares of 
$2.0 million, $18.9 million and $14.4 million, respectively.
Employee Stock Purchase Plan 
In January 2014, the Company adopted the 2014 Employee Stock Purchase Plan, or ESPP, and reserved a total of 600,000 shares of 
common stock for issuance under the ESPP. The ESPP provides for automatic annual increases in shares available for grant, beginning on 
January 1, 2015 through January 1, 2024. Eligible employees may purchase common stock at 85% of the lesser of the fair market value of 
common stock on the offering date or the purchase date with a six-month look-back feature. ESPP purchases are settled with common stock 
from the ESPP’s previously authorized and available pool of shares. During the year ended December 31, 2022, the Company issued 
112,974 shares of common stock under the ESPP. As of December 31, 2022, an aggregate of 4,585,921 shares of common stock have been 
authorized for future issuance on the ESPP.
F-31
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
Stock-Based Compensation Expense 
Total stock-based compensation recognized was as follows (in thousands):
Cost of sales
Research and development
Selling, general and administrative
Total stock-based compensation expense
Year Ended December 31,
2021
2022
2020
  $
  $
902     $
74,464    
55,002    
130,368     $
871     $
59,097      
45,011      
104,979     $
827  
47,949  
36,959  
85,735  
Stock-based compensation of $2.2 million, $1.7 million, and $1.2 million was capitalized into inventory for the years ended December 
31, 2022, 2021, and 2020, respectively. Capitalized stock-based compensation is recognized as cost of sales when the related product is 
sold. As of December 31, 2022, the total unrecognized compensation expense related to unvested equity awards, net of estimated 
forfeitures, was $229.4 million, which the Company expects to recognize over an estimated weighted-average period of 2.28 years. In 
determining the estimated fair value of the stock options, PSOs and ESPP, the Company uses the Black-Scholes option-pricing model and 
assumptions discussed below. Each of these inputs is subjective and generally requires significant judgment to determine. 
Expected Term—The Company’s expected term represents the period that the Company’s stock-based awards are expected to be 
outstanding and is determined using the simplified method (based on the mid-point between the vesting date and the end of the 
contractual term). 
Expected Volatility—The Company’s expected volatility is based on historical volatility over the look-back period corresponding to the 
expected term. 
Risk-Free Interest Rate—The risk-free interest rate is based on the U.S. Treasury zero coupon issues in effect at the time of grant for 
periods corresponding with the expected term of option. 
Expected Dividend—The Company has never paid dividends on its common stock and has no plans to pay dividends on its common 
stock. Therefore, the Company used an expected dividend yield of zero. 
Strike price for options awards and PSOs is equal to the closing market value of our common stock on the date of grant. 
The fair value of stock option awards granted was estimated at the date of grant using a Black-Scholes option-pricing model with the 
following weighted-average assumptions:
Expected term (years)
Expected volatility
Risk-free interest rate
Expected dividend rate
Year Ended December 31,
2021
6.06
60%
1.0%
0.0%
2022
6.07
56%
2.0%
0.0%
2020
6.20
61%
0.8%
0.0%
The fair value of PSOs granted was estimated at the date of grant using a Black-Scholes option-pricing model with the following 
weighted-average assumptions:
Expected term (years)
Expected volatility
Risk-free interest rate
Expected dividend rate
13.
Defined Contribution Plan
Year Ended 
December 31,
2022
3.60
57%
1.5%
0.0%
The Company sponsors a retirement plan in which substantially all of its full-time employees in the U.S. and certain other foreign 
countries are eligible to participate. Eligible participants may contribute a percentage of their annual compensation to this plan, subject to 
statutory limitations. The Company recorded $9.0 million, $5.5 million, and $4.3 million as expense related to the plan for the years ended 
December 31, 2022, 2021, and 2020, respectively. 
F-32
 
  
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
14.
Income Taxes
The components of the Company’s loss before income taxes were as follows (in thousands):
Domestic
Foreign
Total loss before income taxes
Year Ended December 31,
2021
2022
2020
  $
  $
703,411     $
(1,686 )    
701,725     $
455,314     $
(2,333 )    
452,981     $
189,449  
(4,090 )
185,359  
The components of the Company’s income tax provision were as follows (in thousands):
Current provision for income taxes:
Federal
State
International
Total current tax provision
Deferred tax provision:
Federal
State
International
Total deferred tax provision
Total provision for income taxes
Year Ended December 31,
2021
2022
2020
  $
  $
—     $
6,062      
1,274      
7,336      
—      
(1,640 )    
—      
(1,640 )    
5,696     $
—     $
(14 )    
1,058      
1,044      
—      
—      
—      
—      
1,044     $
—    
15    
1,192    
1,207    
—    
—    
—    
—    
1,207    
The Company has incurred net operating losses since inception. The Company has not reflected any benefit of such net operating loss 
carryforwards in the accompanying financial statements. The Company has established a full valuation allowance against its deferred tax 
assets due to the uncertainty surrounding the realization of such assets.
 Beginning in 2022, the Tax Cuts and Jobs Act of 2017 eliminated the right to deduct research and development expenditures for tax 
purposes in the period the expenses were incurred and instead requires all U.S. and foreign research and development expenditures to be 
amortized over five and fifteen tax years, respectively. Due to this required capitalization of research and development expenditures and the 
significant taxable income generated as a result of our sale of royalties in July 2022, the Company has recorded current state income tax 
expense of $6.1 million for the year ended December 31, 2022. The current income tax provision is primarily for state taxes the Company 
anticipates paying as a result of statutory limitations on the Company's ability to offset expected taxable income with net operating loss carry 
forwards in certain states.
The effective tax rate of our provision for income taxes differs from the federal statutory rate as follows: 
Federal statutory income tax rate
State income taxes, net of federal benefit
Federal tax credits
Other
Premium on equity issuance
Nondeductible permanent items
Stock-based compensation
Uncertain tax positions
Change in valuation allowance
Foreign rate differential
Provision for income taxes
Year Ended December 31,
2021
2022
2020
21.0   %  
(0.4 )  
5.9    
(0.1 )  
—    
(0.6 )  
(1.2 )  
(1.2 )  
(24.0 )  
(0.2 )  
(0.8 ) %  
21.0   %  
—    
7.2    
0.5    
—    
(0.8 )  
1.3    
(1.4 )  
(27.9 )  
(0.1 )  
(0.2 ) %  
21.0   %
—    
13.7    
(0.5 )  
2.2    
(0.9 )  
0.9    
(2.7 )  
(33.9 )  
(0.5 )  
(0.7 ) %
F-33
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
   
 
 
   
   
   
 
 
   
 
   
 
   
   
   
   
 
 
   
 
   
 
   
   
   
   
   
 
 
 
 
   
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The tax effect of temporary differences that give rise to significant portions of the deferred tax assets is presented below (in 
thousands):
Deferred tax assets:
Loss carryforwards
Tax credits
Stock options
Accruals and reserves
Fixed assets and intangibles
Liabilities for sales of future royalties
Basis difference in equity investments
Capitalized research and development costs
Other
Gross deferred tax assets
Valuation allowance
Total deferred tax assets
Deferred tax liabilities:
In-process research and development
Right-of-use lease assets
Gross deferred tax liabilities
Net deferred tax liabilities
Year Ended December 31,
2022
2021
  $
231,835     $
260,546      
39,784      
27,029      
39,233      
214,900      
8,971      
75,335      
3,028      
900,661      
(894,518 )    
6,143      
306,119  
218,131  
33,564  
25,735  
18,263  
90,826  
3,912  
—  
13,060  
709,610  
(700,669 )  
8,941  
(31,667 )    
(6,143 )    
(37,810 )    
(31,667 )   $
(33,306 )  
(8,941 )  
(42,247 )  
(33,306 )  
  $
As of December 31, 2022 and 2021, the Company had approximately $756.6 million and $1,085.4 million, respectively, of federal net 
operating loss carryforwards available to reduce future taxable income that will begin to expire in 2031. As of December 31, 2022 and 2021, 
the Company had approximately $710.0 million and $777.0 million, respectively, of state net operating loss carryforwards available to reduce 
future taxable income that will begin to expire in 2031.
As of December 31, 2022 and 2021, the Company had federal research tax credit carryforwards of approximately $32.6 million and 
$22.9 million, respectively, available to reduce future tax liabilities that will begin to expire in 2030. As of December 31, 2022 and 2021, the 
Company had state research credit carryforwards of $59.9 million and $44.6 million, respectively, available to reduce future tax liabilities that 
will be carried forward indefinitely. 
As of December 31, 2022 and 2021, the Company had federal Orphan Drug Credits of $239.3 million and $208.1 million, respectively, 
available to reduce future tax liabilities that will begin to expire in 2031. 
The Company’s ability to use net operating loss and tax credit carryforwards to reduce future taxable income and liabilities may be 
subject to annual limitations pursuant to Internal Revenue Code Sections 382 and 383 as a result of ownership changes in the past and 
future. As a result of ownership changes in 2012 and 2011, $3.6 million of federal net operating loss carryforwards, $3.6 million of state net 
operating loss carryforwards, and $0.2 million of federal tax credits are permanently limited. Deferred tax assets for net operating losses and 
tax credits have been reduced and a corresponding adjustment to the valuation allowance has been recorded.
The valuation allowance increased by $193.8 million and $139.5 million during the years ended December 31, 2022 and 2021, 
respectively.
The Company recorded unrecognized tax benefits for uncertainties in income taxes. A reconciliation of the Company’s unrecognized 
tax benefits follows (in thousands):
2022
December 31,
2021
2020
Balance at beginning of year
  $
55,360     $
46,662     $
39,954  
Additions based on tax positions related to current
   year
Additions for tax positions of prior years
Reductions for tax positions of prior years
Balance at end of year
  $
F-34
11,316      
377      
(259 )    
66,794     $
8,542      
356      
(200 )    
55,360     $
6,950  
382  
(624 )
46,662  
 
  
 
 
 
   
 
 
   
   
 
     
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
The entire amount of the unrecognized tax benefits would not impact the Company’s effective tax rate if recognized. The Company has 
elected to include interest and penalties as a component of tax expense. During the years ended December 31, 2022, 2021, and 2020, the 
Company did not recognize accrued interest and penalties related to unrecognized tax benefits. The Company does not anticipate that the 
amount of existing unrecognized tax benefits will significantly increase or decrease during the next year. 
It is the Company’s intention to reinvest the earnings of its non-U.S. subsidiaries in their operations. As of December 31, 2022, the 
Company had not made a provision for any incremental foreign withholding taxes on approximately $10.9 million of the excess of the amount 
of net income for financial reporting over the tax basis of investments in foreign subsidiaries that are essentially permanent in duration. If 
these earnings were repatriated to the U.S., the deferred tax liability associated with these temporary differences would result in a nominal 
amount of withholding taxes.
The Company files income tax returns in the U.S. federal, forty state tax jurisdictions, and ten foreign countries. The federal and state 
income tax returns from inception to December 31, 2022 remain subject to examination.
15.
Commitments and Contingencies
The Company has various manufacturing, construction, clinical, research, and other contracts with vendors in the conduct of the 
normal course of its business. Other than as noted below, contracts are terminable, with varying provisions regarding termination. If a 
contract with a specific vendor were to be terminated, the Company would only be obligated for the products or services that the Company 
had received at the time the termination became effective. 
Manufacturing and service contract obligations primarily relate to the manufacture of inventory for our approved products, the majority 
of which are due in the next 12 months. 
As of December 31, 2022, the aggregate payments under contractually-binding manufacturing and service agreements are as follows 
(in thousands):
Year Ended December 31,
2023
2024
2025
Total
Manufacturing and Services
  $
22,892  
  $
4,467     $
1,597     $
28,956  
The terms of certain of the Company’s licenses, royalties, development and collaboration agreements, as well as other research and 
development activities, require the Company to pay potential future milestone payments based on product development success. The 
amount and timing of such obligations are unknown or uncertain. These potential obligations are further described in “Note 8. License and 
Research Agreements.” 
See “Note 9. Leases” for lease commitments.
Contingencies 
While there are no material legal proceedings the Company is aware of, the Company may become party to various claims and 
complaints arising in the ordinary course of business. Management does not believe that any ultimate liability resulting from any of these 
claims will have a material adverse effect on its results of operations, financial position, or liquidity. However, management cannot give any 
assurance regarding the ultimate outcome of these claims, and their resolution could be material to operating results for any particular period, 
depending upon the level of income for the period. 
Guarantees and Indemnifications 
The Company indemnifies each of its directors and officers for certain events or occurrences, subject to certain limits, while the 
director is or was serving at the Company’s request in such capacity, as permitted under Delaware law and in accordance with its certificate 
of incorporation and bylaws. The term of the indemnification period lasts as long as a director may be subject to any proceeding arising out of 
acts or omissions of such director in such capacity. The maximum amount of potential future indemnification is unlimited; however, the 
Company currently holds director liability insurance. This insurance allows the transfer of risk associated with the Company’s exposure and 
may enable it to recover a portion of any future amounts paid. The Company believes that the fair value of these indemnification obligations 
is minimal. Accordingly, it has not recognized any liabilities relating to these obligations for any period presented.
F-35
 
   
 
 
 
 
 
 
 
   
   
   
 
 
ULTRAGENYX PHARMACEUTICAL INC. 
Notes to Consolidated Financial Statements (continued)
16.
Related Party Transaction
In July 2022, the Company entered into an agreement with a non-profit foundation in which two of the Company’s board members, 
including the Company’s Chief Executive Officer, are also board members of the foundation, whereby a $1.0 million contribution will be paid 
out to the foundation over a four-year period, beginning in the third quarter of 2022, to support rare disease education and awareness. As a 
result, the Company recorded $0.3 million as research and development expense for this agreement for the year ended December 31, 2022.
17.
Net Loss per Share
The following table sets forth the computation of the basic and diluted net loss per share during the years ended December 31, 2022, 
2021, and 2020 (in thousands, except share and per share data): 
Numerator:
Net loss
Denominator:
Weighted-average shares used to compute net loss per
   share, basic and diluted
Net loss per share, basic and diluted
Year Ended December 31,
2021
2022
2020
  $
(707,421 )   $
(454,025 )   $
(186,566 )
  69,914,225       67,795,540       60,845,550  
(3.07 )
(10.12 )   $
(6.70 )   $
  $
The following weighted-average outstanding common stock equivalents were excluded from the computation of diluted net loss per 
share for the periods presented because including them would have been antidilutive:
Options to purchase common stock, RSUs, and PSUs
Employee stock purchase plan
Common stock warrants
2022
  11,290,935    
7,581    
—    
  11,298,516    
Year Ended December 31,
2021
8,214,063    
3,511    
—    
8,217,574    
2020
8,532,236  
2,626  
29,449  
8,564,311  
18.
Accumulated Other Comprehensive Loss
Total accumulated other comprehensive loss consisted of the following (in thousands):
Cumulative foreign currency translation adjustment
Unrealized loss on securities available-for-sale
Total accumulated other comprehensive loss
F-36
Year Ended December 31,
2022
2021
  $
  $
(845 )   $
(5,728 )  
(6,573 )   $
(121 )
(1,283 )
(1,404 )
 
  
 
 
 
 
 
   
   
 
 
     
     
   
 
     
     
   
 
   
  
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 [***] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED BECAUSE THE INFORMATION (I) 
IS NOT MATERIAL AND (II) THE TYPE THAT THE REGISTRANT TREATS A PRIVATE OR CONFIDENTIAL.
_____________________________________________________________
Exhibit 10.25
Commercial Master Service Agreement
Between
Ultragenyx Pharmaceutical Inc.
60 Leveroni Court
Novato, CA 94949 USA
(Herein known as “UGX”)
And
BSP Pharmaceuticals S.p.A.
via Appia km 65,561 04013 Latina Scalo (LT), Italy 
(Herein known as “BSP”)
Hereinafter referred to individually as a “Party” and together as the “Parties”
This Commercial Master Service Agreement (“AGREEMENT”) is made as of the 22ndday of February, 2021 (“EFFECTIVE DATE”), by and 
between UGX (on behalf of itself and its Affiliates and subsidiaries), and BSP.
  
  
                                                                                                                                        
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
Preamble
Whereas,  UGX  is  a  company  engaged  in  the  pharmaceutical  field  focusing  on  development  of  rare  disease  therapies  and  has  obtained 
regulatory approval to market certain medicinal products based on active pharmaceutical ingredients;
Whereas, BSP is a contract development and manufacturing organization focused on innovative products and has the know-how, expertise, 
capability,  experience  and  the  infrastructure  necessary  to  manufacture  certain    DRUG  PRODUCTS  subject  to  and  in  accordance  with  the 
terms hereof; 
Whereas,UGX  wishes  to  establish  a  contractual  relationship  with  BSP  for  the  development,  manufacturing,  supply,  RELEASE  and  store 
DRUG PRODUCTS for UGX as set forth in the respective sections of this AGREEMENT; 
NOW THEREFORE, in consideration of the foregoing, both PARTIES agree to work in a partnership model and are committed to establish 
the  appropriate  level  of  trust  and  transparency.  Each  PARTY  hereto  has  a  duty  of  good  faith  and  fair  dealing  in  connection  with  its 
performance  under  this  AGREEMENT.  Each  PARTY  shall  perform  its  obligations  under  this  AGREEMENT  in  a  diligent,  legal,  ethical  and 
professional manner so as to advance the purposes and intend of this AGREEMENT.  
Hereby agree as follows:
1. Contents
1.     Definition   5
2.     Scope of the Agreement   10
3.     BSP `s Responsabilities  11
4.     UGX Responsibilities  12
5.     Governance Model  12
6.     FOC MATERIALS  15
7.     PURCHASED MATERIALS. EQUIPMENT   17
8.     Forecast   18
9.     Delivery of DRUG PRODUCT   20
10.       DRUG PRODUCT ACCEPTANCE AND REJECTION   21
11.       Price. Invoice and Payment   23
12.       Records. Audits and Inspections  25
13.       Intellectual Property   26
14.       Indemnification   27
15.       General Representation and Warranties  29
16.       Limitation of Liability   31
17.       Insurance  31
18.       Confidential Information   32
19.       Force Majeure  33
20.       Term and Termination   34
21.       Decommissioning   36
22.       EFFECTS OF TERMINATION   36
23.       Miscellaneous  38
Appendix I   41
Product Schedule   41
Appendix II   45
Compliance   45
Appendix III   47
QUALITY AND TECHNICAL AGREEMENT (QTA)   47
  
  
  
  
  
  
  
  
 
  
  
  
1. Definition
a.
b.
c.
d.
e.
f.
g.
h.
ADDITIONAL  SERVICESmeans  any  service  provided  by  BSP  and  approved  by  both  PARTIES,  other  than  the 
MANUFACTURING SERVICES. 
AFFILIATEshall mean with respect to a Party, any person, corporation, company, partnership or other entity that controls, 
is controlled by, or is under common control with that Party. For the purpose of this definition, “control” shall mean direct 
ownership  of  fifty  (50%)  or  more  of  the  shares  of  stock  entitled  to  vote  for  the  election  of  directors,  in  the  case  of  a 
corporation, or fifty percent (50%) of more of the equity interest in the case of any other type of legal entity, status as a 
general  partner  in  any  partnership,  or  any  other  arrangement  whereby  the  entity  or  person  controls  or  has  the  right  to 
control  the  board  of  directors  or  equivalent  governing  body  of  a  corporation  or  other  entity,  or  the  ability  to  cause  the 
direction of the management or policies of a corporation or other entity.
API/DRUG  SUBSTANCE  means  the  active  pharmaceutical  ingredient  or  drug  substance  identified  on  the  applicable 
PRODUCT SCHEDULE, or any intermediate or component of such active pharmaceutical ingredient or drug substance.
API  QUANTITY  DISPENSED  shall  mean  with  respect  to  a  DRUG  PRODUCT  for  any  relevant  period,  the  difference 
between (a) the sum of (i) the total quantity of the API for such DRUG PRODUCT that [***], plus (ii) the the total quantity 
of such API that [***]; less (b) the sum of (i) the total quantity of such API that [***], plus (ii) the quantity of such API [***]. 
For clarity, the API QUANTITY DISPENSED shall include API [***] or [***] while in [***] or [***].
APPLICABLE  LAWS  shall  mean  all  applicable  ordinances,  rules,  regulations,  directives,  laws,  guidelines,  guidance, 
statutes, requirements, national and supranational, as amended from time to time, and court orders of any Authority to the 
extent applicable to the parties, including, without limitation, (a) cGMP, and (b) those of any REGULATORY AUTHORITY 
located  where  the  MANUFACTURING  SERVICES  or  ADDITIONAL  SERVICES  will  be  performed.  APPLICABLE  LAWS 
include,  without  limitation,  the  United  States  Food,  Drug,  and  Cosmetic  Act,  as  amended  (21  U.S.C.  §  301  et  seq.,  21 
CFR  Parts  210,  211  and  11),  and  the  rules  and  regulations  promulgated  thereunder,  and  Directive  2001/83/  EC  and 
amendments, EudraLex, Volume 4, Good Manufacturing Practice (GMP) guidelines, Guidelines of 5 November 2013 on 
Good Distribution Practice of medicinal products for human use 2013/C 343/01), (EU) No 440 536/2014, ICH Guidelines 
and other national requirements as per territories mentioned.
BANKRUPTCY has the meaning set forth in Section 20.2.7.
BACKGROUND INTELLECTUAL PROPERTY has the meaning set forth in Section 13.1.
BATCH(ES)shall mean a specific quantity of material produced in a process or series of processes so that it is expected 
to be homogeneous within specified limits. In the case of continuous production, a BATCH may correspond to a defined 
fraction of the production. The batch size can be defined either by a fixed quantity or by the amount produced in a fixed 
time interval.
  
  
  
  
  
  
  
 
  
  
  
  
  
  
  
  
  
  
  
i.
j.
k.
l.
m.
n.
o.
p.
BATCH DOCUMENTATION shall mean the complete set of information, data and results applicable to one batch relating 
to  the  MANUFACTURING,  control  and  RELEASE  of  the  particular  BATCH,  including  but  not  limited  to  the  applicable 
executed  BATCH  records,  laboratory  control  results  and  in-process  control  results,  any  applicable  deviation  and
investigation  reports  and  the  CERTIFICATE  OF  ANALYSIS,  certificate  of  confirmation,  change  requests,  which  are 
required to comply with all applicable cGMP requirements.
BINDING FORECAST has the meaning set forth in Section 8.3.1.
BSP INVENTION has the meaning set forth in Section 13.4.
BUSINESS DAY  shall  mean  each  day  of  the  week  on  which  a  Party`s  offices  are  open  for  business  (usually  any  day 
except Saturday, Sunday and legal holidays in Italy, Switzerland and United States of America).
CALENDAR QUARTER shall mean the respective periods of three (3) consecutive calendar months ending March 31st, 
June 30th, September 30th and December 31st.
CALENDAR MONTH shall mean means any of the twelve (12) calendar months of a CALENDAR YEAR.
CALENDAR YEAR means a period of twelve consecutive months from January 1st to December 31st.
CERTIFICATE  OF  ANALYSIS or CoA  shall  mean  a  document  detailing  test  procedures,  SPECIFICATION  and  results 
and signed by BSP qualified person to assure results are accurate and complete and certifying that a particular BATCH 
was MANUFACTURED and tested according to the MANUFACTURING process then in effect and is compliant with all 
APPLICABLE LAWS and cGMP requirements. The CoA includes the Batch Certificate information and statement.
q.
CLAIM has the meaning set forth in Section 14.1.
r.
s.
t.
u.
v.
w.
CONFIDENTIAL INFORMATION has the meaning set in forth in Section 18.1.
DECOMMISSIONING means the activities set forth in Article 21, including the process of verifying that all UGX and BSP 
contractual  commitments  have  been  met  and  that  all  data,  information,  documents,  software,  DRUG  PRODUCT, 
PURCHASED  MATERIAL,  samples,  FOC  MATERIAL  and  UGX  property  have  either  been  returned  to  UGX  and/or 
destroyed by BSP, at UGX discretion and expenses.
DEDICATED EQUIPMENT shall mean all Equipment that is used only for the Drug Product and that the Parties determine 
in good faith as necessary to perform any part of the MANUFACTURING SERVICES and ADDITIONAL SERVICES.s
DELIVERY DATE means, with respect to a quantity of DRUG PRODUCT ordered by UGX in a PURCHASE ORDER, the 
date indicated in the PURCHASE ORDER on which UGX requires the quantity of DRUG PRODUCT to be available for 
delivery after its RELEASE. 
DRUG  PRODUCT  means  the  form  of  medicinal  product  to  be  MANUFACTURED  by  BSP  as  further  described  in  the 
applicable PRODUCT SCHEDULE.
EQUIPMENT means any equipment system or machinery, including the DEDICATED EQUIPMENT, owned, provided to, 
and used by BSP for the MANUFACTURING, holding, processing, testing, RELEASE and/or packaging of UGX`s DRUG 
PRODUCT.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
x.
y.
z.
EXECUTIVE LEADERSHIP shall mean for the purpose of this AGREEMENT any representatives ([***] or [***]) to each 
Party having a [***]. 
FACILITY shall mean the BSP manufacturing site located in via Appia km 65,561 - 04013 Latina Scalo (LT), Italy.
FOC (Free of Charge) MATERIAL means API/DRUG SUBSTANCE and other materials supplied by UGX to BSP free of 
charge. 
aa.
FORCE MAJEURE EVENT shall have the meaning as provided in Section 19.
bb.
cc.
cGMP  shall  mean  Current  Good  Manufacturing  Practices  as  regulated  under  APPLICABLE  LAW.  Current  Good 
Manufacturing  Practice  (cGMP)  is  the  applicable  term  in  the  United  States.  For  the  purpose  of  this  AGREEMENT,  the 
terms “GMP” and “cGMP” are equivalent.
LATENT DEFECT  means  a  defect  or  a  non-conformity  of  FOC  MATERIAL  or  DRUG  PRODUCT,  as  the  case  may  be, 
which was already present at the time of delivery but was not and could not be detectable upon (i) reasonable physical 
inspection and (ii) testing using the methodology specified in the QTA, this latter only in the event that testing on DRUG 
PRODUCT is performed by UGX or a third independent laboratory pursuant to Section 10.6. 
dd.
IMPROVEMENT means technical and business process optimization that is beneficial for the MANUFACTURING, UGX’s 
DRUG PRODUCT quality, financial aspect or supply of UGX`s DRUG PRODUCT.
ee.
INDEMNIFICATION NOTE has the meaning set forth in Section 14.2.
ff.
INDEMNIFIED PARTY has the meaning set forth in Section 14.2.
gg.
INDEMNIFYING PARTY has the meaning set forth in Section 14.2.
hh.
[***] FORECASThas the meaning set forth in Section 8.1.
ii.
INTELLECTUAL PROPERTY RIGHTS or IP RIGHTS means rights in patents, patent applications (including all utility and 
design patents and patent applications), know how, INVENTIONS (whether or not patented or patentable), trade secrets, 
copyrights,  trademarks, service marks, trade names, internet domain names, rights in designs, rights in get-up and trade 
dress, goodwill and the right to sue for passing off or unfair competition, copyrights, (including all computer applications, 
programs and other software, including without limitation operating software, network software, firmware, middleware, and 
design  software  rights  in  computer  software  and  databases),  database  rights,  industrial  property  rights,  moral  rights  of 
authors,  rights  to  use  and  protect  the  confidentiality  of,  confidential  information,  utility  models,  all  rights  of  renewal, 
continuations,  divisions,  extensions  and  the  like  relating  to  the  foregoing,  and  other  intellectual  property  rights,  in  each 
case whether registered or unregistered and including any applications and rights to apply for the grant of any such rights 
and all rights and forms of protection having an equivalent or similar effect anywhere in the world– and the like that are 
afforded  (or  may  be  afforded  upon  action  by  a  REGULATORY  AUTHORITY,  such  as  the  United  States  patent  Office) 
Intellectual Property Rights.
jj.
INVENTIONSshall  mean  all  formulas,  processes,  techniques,  compounds,  compositions,  data,  copyrightable  material, 
know-how, improvements and inventions, whether or not patentable or copyrightable, which are made, conceived, learned 
or reduced to practice, either alone or jointly by a Party during the performance of the MANUFACTURING SERVICES and 
ADDITIONAL SERVICES under this AGREEMENT.
kk.
JOINT STEERING COMMITTEE shall mean the committee selected by the Parties in accordance with the criteria set out 
under Section 5 of this AGREEMENT. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
ll.
JOINT WORKING TEAM shall mean the team selected by the STEERING COMMITTEE in accordance with the criteria 
set out under Section 5 of this AGREEMENT. 
mm. JOINT WORKING TEAM LEAD has the meanings set forth in Section 5.12.
nn.
LOSSES has the meaning set forth in Section 14.1.
oo.
[***] shall mean the [***]that [***] on an [***] as agreed in writing by the Parties and set forth in the PRODUCT 
SCHEDULE. 
pp. MANUFACTURE or MANUFACTURING  or  MANUFACTUREDmeans  any  steps,  processes  and  activities  that  relate  to 
the manufacturing of DRUG PRODUCT, including without limitation, the quality control and release of FOC MATERIALS, 
the  RELEASE,  the  process  and  the  filling  and  packaging  for  transport  of  DRUG  PRODUCT,  as  performed  by  BSP  in 
accordance with the SPECIFICATION, cGMP, this AGREEMENT and QTA conditions.
qq. MANUFACTURING  DATE  shall  be  the  date  confirmed  in  writing  by  BSP  subject  to  UGX’s  approval  for  the 
MANUFACTURE of a certain BATCH of DRUG PRODUCT.
rr.
ss.
tt.
uu.
vv.
MANUFACTURING SERVICES means all activities related to MANUFACTURING of DRUG PRODUCT as described in 
this  AGREEMENT,  including  all  activities  and  material  involved  in  converting  FOC  MATERIAL  into  DRUG  PRODUCT 
according to the quality standards set forth in the QTA.
MANUFACTURING SERVICE FEE means the price related cost of all activities involved in converting FOC Materials into 
DRUG  PRODUCT  (including,  without  limitation  and  except  as  otherwise  provided  in  this  AGREEMENT,  costs  of  in-
process control, quality assurance, quality control and RELEASE, bulk packaging, storage of FOC MATERIALS, disposal 
of  waste  produced 
the  SERVICES). 
MANUFACTURING SERVICE FEE shall be set forth on each applicable PRODUCT SCHEDULE.
the  MANUFACTURE  of  DRUG  PRODUCT  or  performance  of 
from 
MATERIAL CHANGE IN CONTROL shall mean any of the following: (i) the sale or disposition of all or substantially all of 
the  assets  of  a  Party  to  another  entity,  (ii)  the  acquisition  by  another  entity,  of  more  than  50%  of  a  Party’s  outstanding 
shares of voting capital stock (e.g. capital stock entitled to vote generally for the election of directors), or (iii) the merger or 
consolidation of a Party with or into another corporation.
NON-CONFORMING  means  a  BATCH  that  fails  to  conform  to  the  quality  and  regulatory  requirements  of  this 
AGREEMENT and the QTA, including the DRUG PRODUCT SPECIFICATIONS.
OFFER  shall  mean  BSP’s  quotation  containing  the  prices  and  details  of  the  MANUFACTURING  SERVICES  and/or 
ADDITIONAL SERVICES subject to UGX’s request. 
WW. PERSON IN PLANT shall mean UGX’s representative(s) present at Facility.
xx.
PERMISSIBLE FLUCTUATION has the meaning set forth in Section 8.4.1.
yy.
zz.
PRODUCT SCHEDULE means a product specific-agreement meeting the requirements for a PRODUCT SCHEDULE set 
forth  in  this  Agreement,  substantially  in  the  form  attached  hereto  as  Appendix  I,  executed  by  both  UGX  and  BSP,    that 
engages BSP to provide UGX with specified MANUFACTURING SERVICES and ADDITIONAL SERVICES.
PURCHASE ORDER shall mean either a written or electronic PURCHASE ORDER for MANUFACTURING SERVICES
and/or ADDITIONAL SERVICES placed and issued by UGX with a corresponding PURCHASE ORDER number to BSP in 
accordance with this AGREEMENT. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
aaa. PURCHASED MATERIAL shall mean all materials, apart from FOC MATERIALS, that include raw materials, excipients, 
packaging and labeling materials, components, disposable equipment and change parts, purchased by BSP used by this 
latter in the MANUFACTURING of DRUG PRODUCT and in the provision of MANUFACTURING SERVICES.
bbb. QUALITY  AND  TECHNICAL  AGREEMENT  or  QTAshall  mean  the  Technical  and  Quality  Agreement  accepted  by  the 
Parties and attached to this AGREEMENT under its Appendix III. 
ccc. QUARANTINE SHIPMENT shall mean a shipment of FOC MATERIAL by UGX or of DRUG PRODUCT by BSP before 
the issuance of relevant certificates of analysis in accordance with the QTA. 
ddd. RECORDS shall have the meaning set forth in Section 12.1.
eee. REGULATORY  AUTHORITY  shall  mean  any  supranational,  national,  regional,  state  or  local  government,  court, 
governmental agency, authority, board, bureau, instrumentality or regulatory body, including FDA and EMA.
fff.
REIMBURSABLE  VALUE  means  the  value  set  forth  in  the  applicable  PRODUCT  SCHEDULE  determined  by  mutual 
agreement of the Parties for loss of FOC MATERIAL for the reasons set forth in Section 10.8.
ggg. RELEASEshall mean DRUG PRODUCT that is quality-released by BSP’s qualified person as per QTA.
hhh. RENEWAL TERM shall have the meaning set forth in Section 20.1.
iii.
RETENTION PERIOD shall have the meaning set forth in Section 12.2.
jjj.
SPECIFICATIONS shall mean a list of tests, references to analytical procedures, and appropriate acceptance criteria that 
are numerical limits, ranges, or other criteria for the test described. It establishes the set of criteria to which a material or 
DRUG PRODUCT should conform to be considered acceptable for its intended use. Conformance to specification means 
that  the  material  or  DRUG  PRODUCT,  when  tested  according  to  the  listed  analytical  procedures,  meets  the  listed 
acceptance criteria. For the sake of clarity, DRUG PRODUCT SPECIFICATIONS are provided by UGX.
kkk. STORAGE FEE shall mean the fee paid by UGX for storing the DRUG PRODUCT at FACILITY in accordance with this 
AGREEMENT and the relevant PRODUCT SCHEDULE
lll.
TARGET YIELD shall have the meaning set forth in Section 10.11.
mmm.  TERM shall have the meaning set forth in Section 20.1.
nnn. THIRD-PARTY shall mean any person other than UGX, BSP and their respective AFFILIATES. 
ooo. TERRITORY shall mean the following countries: EU, USA, Japan, or any different country as agreed by the Parties in the 
QTA during the term of this AGREEMENT after the EFFECTIVE DATE.
ppp. TRANSFER REQUEST has the meaning set forth in Section 20.4.
qqq. UGX INVENTION has the meaning set forth in Section 13.3.
rrr.
 WORK IN PROCESS means filled and stoppered vials of DRUG PRODUCT at any time prior to the RELEASE.
2. Scope of the Agreement
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
a.
UGX hereby retains BSP to perform the MANUFACTURING SERVICES and the ADDITIONAL SERVICES for the benefit 
of  UGX  in  accordance  with  the  terms  of  this  AGREEMENT  and  the  applicable  PRODUCT  SCHEDULE,  the  applicable
DRUG PRODUCT SPECIFICATIONS, the applicable PURCHASE ORDER(S) and the QTA. On the terms set forth herein, 
UGX will pay the MANUFACTURING SERVICES FEE and ADDITIONAL SERVICES fee, if any, as agreed between the 
Parties pursuant to this AGREEMENT.
b.
It is understood that:
1.
2.
UGX is not obliged to retain BSP as exclusive manufacturer for DRUG PRODUCT; 
BSP will perform the MANUFACTURING SERVICES and the ADDITONAL SERVICES on a non-exclusive basis. 
c.
d.
e.
f.
g.
A  description  of  the  MANUFACTURING  SERVICES  and  ADDITIONAL  SERVICES  shall  be  contained  in  any  relevant 
PRODUCT SCHEDULE, consistent with the form attached hereto as Appendix I.
From time to time during the term of this AGREEMENT, BSP and UGX may enter into PRODUCT SCHEDULES, which 
shall  be  executed  by  duly  authorized  signatories  of  each  Party.  Each  PRODUCT  SCHEDULE  shall  be  subject  to  and 
deemed to be part of and regulated by this AGREEMENT. No PRODUCT SCHEDULE, or any modification thereto, shall 
be  attached  to  or  made  a  part  of  this  AGREEMENT  without  first  being  executed  by  the  Parties  hereto  in  writing, 
specifically referencing this AGREEMENT.
This  AGREEMENT  will  form  the  basis  for  the  issuance  of  PURCHASE  ORDERS  by  UGX  to  BSP.  This  AGREEMENT 
(including  the  applicable  PRODUCT  SCHEDULE  and  QTA)  regulates  and  forms  an  integral  part  of  such  PURCHASE 
ORDERS. In addition, each PURCHASE ORDER will be subject to and deemed to be a part of this AGREEMENT. The 
Parties  acknowledge  that  any  document  shared  among  them  under  this  AGREEMENT,  including  any  PURCHASE 
ORDER and other business form or written authorization used by UGX or BSP, may include or refer to a Party’s general 
terms and conditions. The Parties agree that any of such general terms and conditions of the Parties shall not (i) apply to 
any  transactions  under  this  AGREEMENT  and  (ii)  have  any  effect  on  the  rights,  duties  or  obligations  of  the  Parties  as 
detailed in this AGREEMENT, any PURCHASE ORDER, PRODUCT SCHEDULE and the QTA or otherwise modify this 
AGREEMENT, any PURCHASE ORDER, PRODUCT SCHEDULE and the QTA, regardless of any failure of UGX or BSP 
to object to such Party’s general terms and conditions. 
Each  PRODUCT  SCHEDULE  takes  effect  upon  execution  by  the  Parties  and  shall  continue  to  be  in  force  until  this 
AGREEMENT  is  terminated  for  whatever  reason  pursuant  to  Section  20  of  this  AGREEMENT.  Each  PRODUCT 
SCHEDULE may be terminated independently of the rest of this AGREEMENT, with any provision of this AGREEMENT 
relevant to termination applying only to that specific PRODUCT SCHEDULE. As soon as practicable and in connection 
with  the  execution  of  any  PRODUCT  SCHEDULE,  as  applicable,  the  Parties  shall  enter  into  appropriate  QTA.  The 
obligations  set  forth  in  the  QTA,  and  any  amendments  thereto,  shall  become  part  of,  and  be  incorporated  into,  this 
AGREEMENT  and  the  relevant  PRODUCT  SCHEDULE  and  regulate  the  execution  of  any  of  MANUFACTURING 
SERVICES and ADDITONAL SERVICES detailed herein.
In case of any conflict between the QTA and this AGREEMENT (to which the PURCHASE ORDER(S) and the applicable 
PRODUCT SCHEDULE that includes the OFFER approved by UGX, are an integral part) this AGREEMENT shall prevail, 
unless otherwise expressly agreed either in the QTA, PURCHASE ORDER(S) or applicable PRODUCT SCHEDULE that 
(i) makes reference to the specific section of this AGREEMENT to be overruled by the QTA, and (ii) has been approved in 
writing by both Parties; provided, however, that to the extent such conflict relates to the quality provisions of the QTA, the 
QTA will take precedence.
h.
Attached to this AGREEMENT are the following Appendixes which form an integral part of this AGREEMENT: 
Appendix I
Product Schedule 
Appendix II
Compliance
Appendix III
QUALITY AND TECHNICAL AGREEMENT (QTA)
  
  
  
  
  
  
  
  
  
  
  
3. BSP Responsibilities
a.
b.
c.
d.
e.
BSP  shall  comply  with  this  AGREEMENT,  all  its  Appendixes,  cGMP  and  with  recognized  industry  standards  in  the 
performance of the MANUFACTURING SERVICES and ADDITIONAL SERVICES. 
BSP shall (i) make available and maintain the manufacturing site, the EQUIPMENT, as required by cGMP, BSP’s SOPs 
and  the  QTA,  and  (ii)  employ  and  dedicate  to  the  performance  of  MANUFACTURING  SERVICES  and  ADDITIONAL 
SERVICES  a  sufficient  number  of  trained  and  competent  personnel  with  relevant  knowledge  and  experience,  and  (iii) 
ensure capacity to store the FOC MATERIAL and the excipients needed for the MANUFACTURING SERVICES and the 
ADDITIONAL SERVICES within the timeframe set forth in this AGREEMENT and in accordance with the QTA.
BSP will notify UGX immediately of any potential failure to deliver the DRUG PRODUCT within the agreed timelines.
BSP will render the MANUFACTURING SERVICES and the ADDITIONAL SERVICES in a professional and workmanlike 
manner in accordance with applicable industry standards and this AGREEMENT, including the QTA.
BSP will comply with any exposure guidelines set forth in any material safety data sheets provided by UGX for the DRUG 
PRODUCT.  BSP  will  promptly  inform  UGX  of  any  adverse  environmental,  health  or  safety  events  related  to  the 
MANUFACTURING of the DRUG PRODUCT.
4. UGX Responsibilities
a.
UGX shall be responsible to:
1.
2.
3.
4.
provide BSP with FOC MATERIAL’s material safety data sheet to MANUFACTURE the DRUG PRODUCT.
provide  BSP  with  FOC  MATERIAL  necessary  to  perform  the  MANUFACTURING  SERVICES  in  line  with  Section  6  of  this 
AGREEMENT and according to all provisions in the relevant PRODUCT SCHEDULE, where applicable. FOC MATERIAL shall 
be  (i)  suitable  for  the  MANUFACTURING  of  the  DRUG  PRODUCT,  (ii)  compliant  with  APPLICABLE  LAWS,  and  (iii)  provided 
with the relevant documentation, including the certificate of analysis.
pay BSP for the MANUFACTURING SERVICES and ADDITIONAL SERVICES in accordance with the pricing, milestones and 
payment terms set forth in the applicable PRODUCT SCHEDULE, PURCHASE ORDER(s) and the terms of this AGREEMENT.
perform  any  other  obligations  expressly  assigned  to  UGX  in  this  AGREEMENT,  the  relevant  PRODUCT  SCHEDULE,  any 
PURCHASE ORDER and the QTA. 
b.
UGX shall comply with this AGREEMENT, all its Appendixes and the QTA.
5. Governance Model
a.
b.
The governance model set forth herein below encompasses a JOINT STEERING COMMITTEE and a JOINT WORKING 
TEAM  focusing  on  operational  execution.  The  JOINT  WORKING  TEAM  will  be  led  by  the  JOINT  WORKING  TEAM 
LEADS (as defined below). 
Within  [***]  CALENDAR  DAYS  of  the  EFFECTIVE  DATE  or  at  UGX’s  request,  the  Parties  shall  establish  a  JOINT 
STEERING COMMITTEE consisting of at least [[***] ([***]) [[***]] members to provide overall strategic vision and 
  
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
1.
2.
3.
4.
5.
6.
7.
direction  for  the  Parties  to  perform  their  respective  obligations  under  this  AGREEMENT,  any  of  its  Appendixes  and  the 
QTA.  Each  Party  will  nominate  minimum  [***]([***])]  JOINT  STEERING  COMMITTEE  members  with  [***]  from  each  of 
UGX  and  BSP  having  oversight  for  quality  activities,  and  with  [***]from  each  of  UGX  and  BSP  having  oversight  for 
manufacturing and supply chain activities.
Either Party may replace its JOINT STEERING COMMITTEE members by written notice to the other Party.
The  JOINT  STEERING  COMMITTEE  members  shall  be  appropriately  qualified  and  experienced  in  order  to  make  a 
meaningful contribution to the JOINT STEERING COMMITTEE meetings. 
c.
d.
e.
The responsibilities of the JOINT STEERING COMMITTEE are to: 
establish and maintain an effective and efficient collaboration between the Parties;
confirm the JOINT WORKING TEAM leads by each Party;
resolve  any  dispute  or  disagreement  among  the  Parties  regarding  the  execution  of  this  AGREEMENT  or  the  progress  of  the 
MANUFACTURING SERVICES or ADDITIONAL SERVICES that cannot be resolved at the JOINT WORKING TEAM level;
act as escalation body for issue resolution;
define the framework for continuous IMPROVEMENT, mutual long-term objectives and priorities;
reviewing  and  validating  any  amendment  or  update  to  this  AGREEMENT  (including  any  updated  PURCHASE  ORDER  and 
modifications to the QTA);
any other topics assigned to it in compliance with this AGREEMENT or following a mutual decision of the Parties.
f.
g.
h.
i.
j.
k.
The  JOINT  STEERING  COMMITTEE,  which  shall  conduct  its  discussions  in  good  faith  with  a  view  to  operating  to  the 
mutual benefit of the Parties, shall meet as often as its members may determine and in any case at a minimum [***] per 
CALENDAR YEAR. Meetings can be held face-to-face or by teleconference. Either Party may request a meeting within 
[[***] ([***])BUSINESS DAYS in in case it is perceived as necessary.
The  agenda  (including  any  pre-read  material,  if  any)  shall  (i)  include  all  relevant  topics  to  be  discussed  between  the 
JOINT  STEERING  COMMITTEE  members  and  (ii)  be  distributed  in  an  agreed  timeframe  prior  to  the  related  meeting 
between such JOINT STEERING COMMITTEE members. 
Each Party may invite other representatives with particular skills, who are part of their respective organizations to attend 
such JOINT STEERING COMMITTEE meetings, where it is considered to be relevant and appropriate.
All  decisions  of  the  JOINT  STEERING  COMMITTEE  shall  be  made  in  good  faith,  in  the  best  interests  of  the  compliant 
performance  of  this  AGREEMENT,  and  be  [***]  by  all  of  its  members  or  their  designated  representatives.  All  such 
decisions  will  be  reflected  in  written  meeting  reports  which  summarily  address  topics  discussed,  delegation  of  work, 
schedules and decisions of the JOINT STEERING COMMITTEE. In the event that the JOINT STEERING COMMITTEE is 
unable  to  reach  a  decision  on  any  matter  critical  to  business  or  DRUG  PRODUCT  after  good  faith  attempts  to  resolve 
such  disagreement  in  a  commercially  reasonable  fashion  within  [***]  BUSINESS  DAYS,  then  such  matter  should  be 
referred  to  the  [***]of  both  Parties  who  should  use  reasonable  and  good  faith  efforts  to  reach  a  decision  by  consensus 
within [***] BUSINESS DAYS after such matter is referred to them or such other time period as is agreed to by the Parties.
If the [***] does not reach an agreement in accordance with Section 5.9, either Party may commence dispute resolution 
proceedings in accordance with the relevant provisions set out in Section 23.8.
The  JOINT  STEERING  COMMITTEE  members  shall  draft  agenda  and  take  minutes  of  its  meetings  and  resolutions, 
which  shall  be  promptly  circulated  to  the  Parties  after  each  meeting  for  adjustment  and  agreement,  unless  otherwise 
mutually agreed by the Parties. In case of any disagreement Sections 5.9 and 5.10 shall apply.
  
  
  
  
  
  
  
  
  
  
l.
m.
n.
Within  [***]  CALENDAR  DAYS  of  the  EFFECTIVE  DATE  or  at  UGX’s  request,  the  Parties  shall  establish  a  JOINT 
WORKING TEAM appointing [***] subject matter expert each with primary responsibility for day-to-day interactions with 
the other Party to allow the compliant and timely performance of the MANUFACTURING SERVICES and ADDITIONAL 
SERVICES under this AGREEMENT (each, a “JOINT WORKING TEAM LEAD”). Thus, the minimum size of the JOINT 
WORKING TEAM shall be of [***] JOINT WORKING TEAM LEADS. 
The JOINT WORKING TEAM LEADS may invite additional members. Such members shall be appropriately qualified and 
experienced in order to make a meaningful contribution to the JOINT WORKING TEAM meetings.
Either  Party  may  replace  its  JOINT  WORKING  TEAM  LEADS  and  members,  where  applicable,  by  written  notice  to  the 
other  Party.  Should  UGX  not  be  satisfied  of  BSP’s  JOINT  WORKING  TEAM  LEAD,  UGX  may  communicate  such 
dissatisfaction  to  BSP,  which  will  (i)  check  and  clarify  with  UGX  the  reasons  for  such  dissatisfaction  and  (ii)  promptly 
substitute the relevant JOINT WORKING TEAM LEAD. While exploring alternatives for a new JOINT WORKING TEAM 
LEAD that could be satisfactory for UGX, BSP shall guarantee full project management support.
o.
The responsibilities of the JOINT WORKING TEAM are to: 
drive and improve performance of MANUFACTURING SERVICES and ADDITIONAL SERVICES, if any, including the TARGET 
YIELD, and the JOINT WORKING TEAM functionality;
establish,  manage  and  review  routinely  other  relevant  key  performance  indicators  applicable  to  the  MANUFACTURING 
SERVICES and ADDITIONAL SERVICES whether agreed and discussed in writing by the Parties in advance;
manage MANUFACTURING SERVICES and ADDITIONAL SERVICES risks, including lead times and safety stock management 
of PURCHASED MATERIALS;
overseeing  and  monitoring  the  MANUFACTURING  and  manage  any  and  all  issues  related  to  the  MANUFACTURING 
SERVICES and the ADDITIONAL SERVICES;
maintain a collaborative and constructive relationship (at operational level);
facilitate expeditious resolution of any issues, also in accordance with the instructions from the JOINT STEERING COMMITTEE, 
if received;
propose any IMPROVEMENT to the JOINT STEERING COMMITTEE functionality.
p.
q.
r.
s.
The JOINT WORKING TEAM shall meet as often as the JOINT WORKING TEAM MEMBERS may determine, but in any 
event not less than [***]per [***]. Meetings can be held face-to-face or by teleconference.
The JOINT WORKING TEAM shall conduct its discussion in good faith with a view to operating to the mutual benefit of 
the Parties.
All decisions of the JOINT WORKING TEAM shall be made in good faith in the best interest of the timely and compliant 
performance of this AGREEMENT, including the QTA. In the event that the JOINT WORKING TEAM is unable to reach a 
decision  on  any  matter  after  good  faith  attempts  to  resolve  such  disagreement  in  a  commercially  reasonable  fashion 
within [***] BUSINESS DAYS, then such matter should be referred to and decided by the JOINT STEERING COMMITTEE 
which shall decide according to Sections 5.09., 5.10. and 5.11. 
BSP’s  JOINT  WORKING  TEAM  LEAD  shall  take  minutes  of  meeting  and  resolution,  which  shall  be  circulated  in  an 
agreed time frame after each meeting for adjustment and agreement. 
FOC MATERIALS
UGX  shall,  [***]  supply  BSP  with  a  sufficient  quantity  of  FOC  MATERIALS  for  BSP  to  perform  the  MANUFACTURING 
SERVICES and/or ADDITIONAL SERVICES according to any applicable PURCHASE ORDER and this AGREEMENT. BSP will 
store FOC MATERIALS in accordance with the FOC MATERIALS SPECIFICATIONS and the QTA. BSP shall not use any FOC 
1.
2.
3.
4.
5.
6.
7.
6.
1.
  
  
  
  
  
  
  
  
  
  
2.
3.
4.
5.
6.
MATERIALS  for  any  purpose  other  than  the  performance  of  the  MANUFACTURING  SERVICES  and/or  ADDITIONAL 
SERVICES. UGX  will  promptly  inform  BSP  if  it  encounters  supply  problems  with  FOC  MATERIALS  supplier,  including  delays 
and/or  delivery  of  FOC  MATERIALS  under  this  AGREEMENT.  UGX  must  take  reasonable  measures  to  mitigate  and  resolve 
such problems.
UGX will maintain the title on all FOC MATERIAL, any WORK IN PROCESS and DRUG PRODUCT at each and every stage of 
the  MANUFACTURING,  including  the  storage.  BSP  will  custody  FOC  MATERIAL,  any  WORK  IN  PROCESS  and  DRUG 
PRODUCT free and clear of all liens and encumbrances.
UGX shall deliver, or cause to be delivered, sufficient quantities of FOC MATERIAL (i) not earlier than [***] and no later than [***] 
before  the  agreed  [***],  unless  otherwise  provided  in  the  applicable  PRODUCT  SCHEDULE,  and  (ii)  accompanied  by  such 
certificates  of  analysis  and  other  documents  as  required  by  the  applicable  QTA.  Should  FOC  MATERIAL  not  be  released 
according  to  the  QTA,  UGX  shall  be  entitled  to  deliver,  at  [***]  costs,  such  FOC  MATERIAL  to  BSP  as  QUARANTINED 
SHIPMENT, provided that all such FOC MATERIALS in QUARANTINED SHIPMENT shall not be used for the MANUFACTURE 
of DRUG PRODUCT until the relevant certificate of analysis is issued by the relevant manufacturer. Should FOC MATERIAL not 
be  available  to  be  delivered  at  BSP  at  least  [***]  before  the  [***],  then  UGX  shall  immediately  notify  BSP  thereof.  Promptly 
thereafter, the Parties shall discuss in good faith if BSP can (i) meet the original DELIVERY DATE using its [***] to do so, or (ii) 
adjust the new MANUFACTURING DATE based on BSP’s production plan to the extent consistent with BSP’s obligations vis-a-
vis  its  other  customers  and  the  estimated  delivery  date  of  FOC  MATERIAL;  provided  that  in  all  cases  BSP  shall  use  [***]  to 
schedule the new MANUFACTURING DATE as soon as possible unless otherwise advised by UGX. Should the adjustment of 
the new MANUFACTURING DATE not be acceptable to UGX, the relevant production shall be cancelled and UGX shall remain 
obligated to [***] pursuant to the provision of Section [***].
Any FOC MATERIALS will be accompanied by a certificate of analysis and any related relevant documentation. BSP shall not 
incorporate any of such FOC MATERIALS into the DRUG PRODUCT in the case the certificate of analysis is not available. At 
the  incoming  of  FOC  MATERIAL,  BSP  shall  run  a  visual  inspection  to  check  the  physical  integrity  of  the  packaging  and  a 
verification of the documentation received in connection with such FOC MATERIAL. If BSP’s incoming inspection of packaging 
and documentation reveals any damages or documentary inconsistencies, BSP shall immediately notify in writing to UGX the 
outcome of such inspection.
In addition, BSP shall conduct incoming tests on FOC MATERIALS in accordance with the related PRODUCT SCHEDULE and 
the  QTA.  If  the  testing  reveals  that  such  FOC  MATERIALS  do  not  comply  with  the  applicable  FOC  MATERIALS 
SPECIFICATIONS, BSP shall give immediately UGX a written notice of such non-compliance in accordance with the terms set 
forth in this AGREEMENT and in the QTA. Upon receipt of the notice of non-compliance and within the timing agreed between 
the  Parties,  but  in  any  case  in  time  for  the  MANUFACTURING  DATE,  UGX  may  request  BSP  to  perform,  at  [***]  costs 
(previously  approved  in  writing  by  UGX),  those  additional  tests  and  controls  on  the  FOC  MATERIAL  to  determine  FOC 
MATERIAL’s compliance or non-compliance with the applicable FOC MATERIALS SPECIFICATIONS, in accordance with cGMP, 
provided that BSP has the capabilities and capacities to conduct such tests and controls. BSP shall promptly inform UGX if the 
required  capabilities  or  capacities  are  not  available  for  a  requested  test  or  control.  UGX  shall  lead  the  investigation  of  any 
purported  non-compliance  of  any  FOC  MATERIAL.  BSP  shall  cooperate  with  UGX’s  reasonable  requests  for  assistance  in 
connection with its evaluation hereunder.
Unless  otherwise  agreed  by  the  Parties,  UGX  shall  replace  such  FOC  MATERIALS  non-conforming  with  the  relevant 
specifications and/or defected pursuant to 6.4 and 6.5 with an equivalent quantity of FOC MATERIALS meeting the applicable 
FOC MATERIALS specifications, at [***], in time for the MANUFACTURING DATE. UGX shall promptly provide instructions to 
BSP for the disposal or return of FOC MATERIALS non-conforming with the relevant specifications and/or defected. Should BSP 
not receive any written instruction within [***] CALENDAR DAYS of the notice set forth in Section 6.5 or alternative term agreed 
upon by the Parties, BSP shall return such FOC MATERIALS non-conforming with the relevant specifications and/or defected to 
UGX  at  [***]  costs  and  expenses  at  the  address  set  forth  in  the  PRODUCT  SCHEDULE.  Should  UGX  not  be  able  to  replace 
FOC  MATERIALS  non-conforming  with  the  relevant  specifications    and/or  defected  in  time  for  the  originally  agreed 
MANUFACTURING DATE, the Parties shall discuss in good faith if BSP can (i) meet the original DELIVERY DATE using its best 
efforts to do so, or (ii) adjust  the new MANUFACTURING DATE based on BSP’s production plan to the extent consistent with 
BSP’s  obligations  vis-a-visits  other  customers  and  the  estimated  delivery  date  of  FOC  MATERIAL;  provided  that  in  all  cases 
BSP  shall  use  [***]  to  schedule  the  new  MANUFACTURING  DATE  as  soon  as  possible,  unless  otherwise  advised  by  UGX. 
Should the adjustment of the new MANUFACTURING DATE not be 
  
  
  
  
  
acceptable  to  UGX,  the  relevant  production  shall  be  cancelled  and  UGX  shall  remain  obligated  to  pay  such  part  of  unused 
capacity pursuant to the provision of Section 8.8.
Except where stated otherwise in a PRODUCT SCHEDULE, BSP will give UGX: (i) a [***]inventory report of [***]-end inventory 
balance of each lot of the FOC MATERIALS and DRUG PRODUCT for such [***] (including the API QUANTITY DISPENSED for 
such [***] and the number of BATCHES attempted for such [***]); and (ii) upon UGX’s request, [***] physical product inventory 
per  calendar  year,  which  will  be  conducted  by  UGX  or  a  designee  of  UGX,  at  the  date  mutually  agreed  upon  by  the  Parties, 
provided  that  should  such  designee  of  UGX  be  a  consultant    then  such  physical  product  inventory  shall  be  subject  to  the 
execution of a confidentiality agreement between UGX, BSP and such consultant.
Not later than [***] CALENDAR DAYS after the end of each [***], BSP shall provide UGX with an accounting, certified by BSP, of 
the disposition of each lot of the FOC MATERIAL for DRUG PRODUCT for such [***] utilizing BSP’s standard format, including 
the API QUANTITY DISPENSED for such [***]and the number of BATCHES attempted for such [***].
7.
8.
9.
Any shipment from UGX or its designee to BSP will be made [***] [***].
7. PURCHASED MATERIALS. DEDICATED EQUIPMENT.
a.
b.
c.
d.
e.
f.
g.
Except as otherwise provided in each PRODUCT SCHEDULE, it will be BSP’s obligation hereunder to purchase, procure, 
store and test at [***]expense and cost, all PURCHASED MATERIALS needed for the MANUFACTURING in accordance 
with this AGREEMENT, all its Appendixes and the QTA.BSP shall apply a handling/service fee of [***] for BSP’s procuring 
and maintaining such PURCHASED MATERIALS.
PURCHASED MATERIALS will be procured and tested by BSP from sources as agreed on by the Parties in good faith 
and as set forth in the PRODUCT SCHEDULE and/or QTA. Such PURCHASED MATERIALS shall meet all PURCHASED 
MATERIALS SPECIFICATIONS and quality requirements set forth in writing by UGX (e.g. in the PRODUCT SCHEDULE 
and/or QTA). BSP will promptly inform UGX if it encounters supply problems, including delays and / or delivery of non-
conforming PURCHASED MATERIALS which could affect the MANUFACTURING of DRUG PRODUCT, as set forth in the 
QTA.
BSP should ensure and maintain, at [***]cost and expense, a dedicated safety stock available of any long lead-time and
critical  PURCHASED  MATERIALS  as  determined  by  the  Parties  in  good  faith  to  cover  unexpected  volumes  and/or 
additional quantities of DRUG PRODUCT in excess of the flexibilities granted under this AGREEMENT and the relevant 
PRODUCT SCHEDULE. The definition of such safety stock levels should be reviewed periodically and mutually agreed 
by the JOINT WORKING TEAM as it seems necessary. Inventory for such safety stocks shall be invoiced separately in 
advance on the basis of a shared plan that shall be initially included in the PRODUCT SCHEDULE and then discussed at 
the end of any CALENDAR YEAR.
PURCHASED  MATERIALS  shall  be  invoiced  separately  and  paid  by  UGX  pursuant  to  Section  11  together  with  the 
MANUFACTURING SERVICE FEE or ADDITIONAL SERVICE fee on the basis of the volumes set forth in the BINDING 
FORECAST. 
UGX may decide to supply PURCHASED MATERIALS to BSP. In such a case, such PURCHASE MATERIALS shall be 
included in the list of FOC MATERIALS outlined in the PRODUCT SCHEDULE.
BSP will not change PURCHASED MATERIALS suppliers or others suppliers of PURCHASED MATERIALS without the 
prior written consent of UGX. BSP will give UGX prior written notice of any such proposed change in accordance with the 
terms of the QTA.
If  requested,  BSP  shall  maintain  [***]backup  (or  such  other  mutually  agreed  upon  quantity  and  costs  set  forth  in  the 
applicable PRODUCT SCHEDULE) of each of the change parts specified in the applicable PRODUCT SCHEDULE. UGX 
shall [***] the [***] set forth in the PRODUCT SCHEDULE, plus [***] of [***].  
  
  
  
  
  
  
  
  
  
  
  
  
h.
i.
j.
Dedicated Equipment. Unless otherwise agreed upon in writing by the Parties in the PRODUCT SCHEDULE, BSP shall 
be  the  owner  of  the  DEDICATED  EQUIPMENT  and  agree  to  maintain  and  manage  in  full  functionality  under  its  own 
responsibility.  For  the  sake  of  clarity,  when  applied  to  freezers  for  which  UGX  has  corresponded  a  contribution,  as  set 
forth in the relevant PRODUCT SCHEDULE, the definition of DEDICATED EQUIPMENT shall be extended to cover such 
equipment and BSP shall use the freezers exclusively for UGX when DRUG PRODUCTS are stored in there.
BSP will operate and use the DEDICATED EQUIPMENT in accordance with the instructions set forth in the DEDICATED 
EQUIPMENT operation manual and will regularly maintain the DEDICATED EQUIPMENT according to technical state of 
the  art  processes.  Unless  otherwise  agreed  upon  in  writing  by  the  Parties  in  the  PRODUCT  SCHEDULE,  BSP  will 
conduct routine repairs, preventative and full maintenance, and calibration of the DEDICATED EQUIPMENT on its own 
expenses, at [***], as well as any extraordinary, corrective, or non-routine maintenance.
In  case  of  termination  of  this  AGREEMENT  or  any  of  its  PRODUCT  SCHEDULE,  [***]  shall  bear  the  costs  of 
decontamination and removal of the DEDICATED EQUIPMENT and shall be solely responsible for, and [***] shall have no 
liability whatsoever with respect to, the decommission, cleaning and decontamination of the DEDICATED EQUIPMENT in 
strict compliance with the APPLICABLE LAWS, including without limitation local health and safety requirements. 
FORECAST. 
[***] Forecast. Upon the execution of each PRODUCT SCHEDULE and in any event at the completion of the PPQ BATCHES, 
UGX shall provide BSP with the [***] forecast of the estimate of the quantities of DRUG PRODUCT that UGX expects BSP to 
MANUFACTURE  during  the  [***]  of  the  TERM  for  such  DRUG  PRODUCT  for  any  dosage  and  any  MANUFACTURING  suite 
distributed  [***]  (the  [***]]  or  [***]],  as  applicable,  based  on  the  expected  DELIVERY  DATE  (such  forecast,  the  “[***] 
FORECAST”). 
[***] Forecast. Update.  On  a  [***]  basis,  on  or  before  the  [***]  of  the  then  applicable  [***],  UGX  will  provide  BSP  with  a  [***]-
forecast for any dosage and any MANUFACTURING suite, which will be subsequently updated in accordance with the terms of 
this AGREEMENT, including without limitation Section 8.4 (each such forecast, a “[***] FORECAST”). 
Binding Period. Unless otherwise agreed by the Parties in any relevant PRODUCT SCHEDULE, each of such [***] FORECAST 
shall have:
the first [***]] periods corresponding to the first [***] of the first [***] of the [***] FORECAST, which will be binding on both Parties 
and expressed in requirements for [***] (the “BINDING FORECAST”);
the  remaining  [***]  corresponding  to  the  last  [***]  of  the  [***]  FORECAST,  which  will  be  non-binding  on  both  Parties  and  thus 
provided for planning purposes only, except for a [***] that cannot be [***] per [***] that will be agreed by the Parties and included 
in the PRODUCT SCHEDULE; requirements for this period shall be expressed per [***].
From the EFFECTIVE DATE through the end of the [***], the quantities of DRUG PRODUCT requested by UGX will be supplied 
by BSP on the basis of PURCHASE ORDERS, subject to the terms and conditions of this AGREEMENT.
In the event that the assumptions on which this forecast mechanism is designed, such as the average of the [***] volumes and 
the limits set forth for the PERMISSIBLE FLUCTUATION, shall change, then the Parties shall meet and discuss in good faith the 
adjustments that shall be made to this forecast mechanism and its related flexibilities, which shall include obligations on long 
term capacity reservation for the [***] FORECAST and an extended BINDING FORECAST.
8.
1.
2.
3.
1.
2.
3.
4.
4.
Permissible Fluctuation.
  
  
  
  
  
  
  
  
  
  
  
  
  
1.
2.
3.
5.
6.
7.
8.
By the [***] day of [***] of any relevant [***], UGX will confirm to BSP the quantities of DRUG PRODUCT (expressed in number 
of BATCHES) that UGX intends to have delivered by BSP in the next succeeding BINDING PERIOD; such quantities shall be 
binding  on  both  Parties  and  shall  still  be  subject  [***]  and  [***]  to  the  [***],  as  set  forth  in  the  PRODUCT  SCHEDULE,  to  be 
exercised during the BINDING PERIOD. 
The PERMISSIBLE FLUCTUATION shall be exercised by UGX no later than [***] prior to the Delivery Date of the Product set 
forth in the BINDING FORECAST. 
Notwithstanding anything of the foregoing, in the event that UGX wants that BSP manufactures a quantity of DRUG PRODUCT 
in  excess  of  those  identified  in  the  BINDING  FORECAST,  then  the  Parties  will  discuss  such  UGX’s  request  in  good  faith  and 
BSP may agree, in its sole discretion, to PURCHASE ORDERS for the manufacture of such quantities of DRUG PRODUCT as it 
deems possible for it to manufacture in accordance with the terms of this AGREEMENT and with BSP’s production plan.
[***] and [***]. Each PRODUCT SCHEDULE may contain (i) [[***] that BSP is [***] and UGX [***] in any [***] and (ii) a [***] with 
respect to the [***].  In the event that, for any reason whatsoever, [***] in excess of such [***] out of [***], the Parties shall [***]. 
The Parties shall discuss and agree in good faith [***]].
Distribution  of  batches  over  the  Binding  Forecast.  Unless  otherwise  provided  in  this  Agreement  or  in  the  PRODUCT 
SCHEDULE, the distribution of BATCHES  over  the  BINDING  FORECAST  shall  not  [***].  In  [***]  of  each  [***],  UGX  and  BSP 
shall [***] for the next succeeding BINDING FORECAST. UGX agrees to make [***] so that such [***] per [***] may not [***] over 
the [***] for the [***].
Financial  Obligations.  The  financial  obligations  set  forth  in  the  BINDING  FORECASTS  shall  be  binding  on  both  Parties  in 
accordance with the terms of this AGREEMENT. In any event, if as of the end of each [***], UGX has not ordered for delivery in 
such [***] at least the aggregate quantity of DRUG PRODUCT set forth in the BINDING FORECAST ([***] through [***])] for such 
DRUG PRODUCT for such [***], then [***] the [***] set forth in [***] and those [***] at an amount equal to [***] ([***]%) of the [***]. 
Notwithstanding the foregoing, should [***] be able to [***] for UGX orders [***] [***], then only [***].
PURCHASE  ORDER.  UGXshall  submit  to  BSP  written  PURCHASE  ORDERS  for  MANUFACTURING  SERVICES  and 
ADDITIONAL SERVICES showing the content set forth in this Section 8.8. All DRUG PRODUCT ordered by UGX shall be in the 
form of a PURCHASE ORDER and , At least [***] prior to the DELIVERY DATE, UGX shall submit to BSP written PURCHASE 
ORDERS for DRUG PRODUCT to be provided by BSP, in accordance to the BINDING FORECAST. UGX shall specify in each 
PURCHASE  ORDER,  UGX’s  order  number,  the  specific  MANUFACTURING  SERVICES  and  ADDITIONAL  SERVICES  being 
ordered,  DRUG  PRODUCT,  quantity,  MANUFACTURING  SERVICE  FEES,  ADDITIONAL  SERVICES  fees,  DELIVERY  DATE 
and,  to  the  extent  applicable,  milestones,  deliverables,  delivery  schedule,  payment  schedule,  invoicing  address  and  other 
requirements. BSP shall, within [***] after the receipt of the PURCHASE ORDER accept in writing such PURCHASE ORDER. 
UGX shall be obligated to purchase, and BSP shall be obligated to have available for delivery on the DELIVERY DATE set forth 
in each PURCHASE ORDER, such quantities of DRUG PRODUCT as are set forth in such PURCHASE ORDER.
9. DELIVERY OF DRUG PRODUCT.
1.
Any delivery of DRUG PRODUCT by BSP to UGX or to a THIRD-PARTY named by UGX will be based on [***] ([***]). BSP will 
package and ship DRUG PRODUCT along with the CERTIFICATE OF ANALYSIS and according to written instructions received 
from  UGX  for  shipment  in  line  with  APPLICABLE  LAWS  and  the  QTA.  In  case  UGX  has  special  requirements  for  transport 
packaging,  UGX  shall  inform  BSP  about  such  requirements  in  a  timely  manner.  If  agreed  between  the  Parties  such  special 
packing requirements shall be documented in writing in a separate document between the Parties. Should BSP support UGX in 
performing  activities  associated  with  the  shipment  (i.e.,  without  limitation,  drafting  and/or  reviewing  of  transport  documents, 
planning  the  delivery,  contacting  the  designated  carrier,  etc.),  an  additional  fee  shall  apply  to  these  services  that  shall  be 
mutually  agreed  upon  by  the  Parties  in  the  relevant  PRODUCT  SCHEDULE.  UGX  will  supply  to  BSP,  or  bear  all  costs  and 
expenses related with, the appropriate materials for packaging according to the specific requirements notified by UGX. 
  
  
  
  
  
  
  
  
  
2.
3.
4.
5.
6.
UGX may request in writing to BSP for a QUARANTINED SHIPMENT of BATCH of DRUG PRODUCT only in urgent cases and 
in accordance with BSP’s internal procedures. QUARANTINED SHIPMENT shall be evaluated case by case by the Parties. Any 
and  all  BATCHES  of  DRUG  PRODUCT  sent  in  quarantine  cannot  be  distributed  on  the  market  until  UGX  has  received  the 
CERTIFICATE OF ANALYSIS, proof of the full RELEASE. UGX assumes all risks, responsibilities and costs associated with a 
QUARANTINED SHIPMENT.
After RELEASE, BSP and UGX shall agree if (a) BSP shall place DRUG PRODUCT with a common carrier for delivery to UGX 
or a THIRD-PARTY, as directed by UGX and in accordance with Incoterms set forth in the Section 9.1, or (b) UGX shall pick up 
DRUG PRODUCT at the FACILITY, or (c) BSP shall store DRUG PRODUCT at the FACILITY within the limitations set forth in 
Section 9.5. and the fees detailed in the relevant PRODUCT SCHEDULE.
UGX  will  obtain,  at  its  expense,  any  import  license  or  other  official  authorization  and  carry  out  all  customs  formalities  for  the 
import  of  the  goods  and  for  their  transport  through  any  country.  Where  applicable,  costs  of  customs  formalities  as  well  as  all 
duties, taxes, and other charges payable upon export and anticipated by BSP will be recovered from UGX. Upon request, BSP 
shall assist UGX in [***] of import and export clearance and shall provide all relevant details or information requested by UGX in 
a timely manner throughout such process. Should BSP support UGX in performing activities associated with customs clearance 
formalities as well as all duties, taxes, and other charges payable upon export, [***] shall apply to these services. For sake of 
clarity, each [***] associated with the [***] shall be recovered from [***].
All DRUG PRODUCT at the FACILITY will be stored in a clean, secured, and segregated area under conditions according to 
DRUG PRODUCT SPECIFICATIONS and, to the extent applicable, the relevant PRODUCT SCHEDULE. UGX shall arrange for 
the pick-up of any DRUG PRODUCT within [***]CALENDAR DAYS of the DELIVERY DATE, which would be [***]. Should UGX 
not commit to such term BSP shall [***] ([***]) as set forth in the relevant PRODUCT SCHEDULE.
Upon  BSP’s  request,  BSP  shall,  at  [***]  costs  and  expenses  and  its  sole  discretion,  ship,  at  the  address  included  in  the 
PRODUCT SCHEDULE within the timelines set forth in this Section 9.6, or destroy the (i) engineering (technical) BATCHES, if 
any,  (ii)  expired  or  NON-CONFORMING  BATCHES,  (iii)  expired  or  non-conforming  PURCHASED  MATERIALS  and/or  FOC 
MATERIAL.  Should  UGX  fail  to  notify  its  preference  within  [***]CALENDAR  DAYS  of  the  receipt  of  BSP’s  request,  then  BSP 
shall proceed with the return of such materials in accordance with the PRODUCT SCHEDULE, at [***]costs and expenses. UGX 
shall  execute  all  relevant  documentation  necessary  to  export  such  materials  in  compliance  with  this  AGREEMENT  and 
APPLICABLE LAWS.
10. DRUG PRODUCT ACCEPTANCE AND REJECTION. 
1.
2.
Each  BATCH  of  DRUG  PRODUCT  will  be  sampled  and  tested  by  BSP  against  DRUG  PRODUCT  SPECIFICATIONS.  The 
BSP’s quality assurance will review the BATCH DOCUMENTATION for such BATCH and will assess if the MANUFACTURE has 
been performed in compliance with cGMP and the MANUFACTURING process. If, based upon such tests, a BATCH of DRUG 
PRODUCT  conforms  to  the  DRUG  PRODUCT  SPECIFICATIONS  and  was  MANUFACTURED  according  to  cGMP  and  the 
MANUFACTURING process, then a CERTIFICATE OF ANALYSIS will be completed and approved by BSP’s qualified person 
for  RELEASE.  Complete  and  accurate  BATCH  DOCUMENTATION  material  for  each  BATCH  of  DRUG  PRODUCT  will  be 
uploaded into a secured, password protected and dedicated electronic data room and with limited access to UGX. If UGX has 
not  received  all  BATCH  DOCUMENTATION  and  RECORDS  within  [***]  BUSINESS  DAYS  after  RELEASE  as  set  forth  in  the 
QTA,  UGX  will  promptly  notify  BSP  in  writing.  If  UGX  requires  additional  copies  of  such  BATCH  DOCUMENTATION  or 
RECORDS,  these  will  be  provided  by  BSP  to  UGX  at  [***]  cost.  UGX  will  review  the  BATCH  DOCUMENTATION  for  each 
BATCH of DRUG PRODUCT and may test samples of such BATCH against the DRUG PRODUCT SPECIFICATIONS. During 
this review period, the Parties agree to respond promptly, in accordance with the QTA, to any reasonable inquiry by the other 
Party with respect to the BATCH DOCUMENTATION.  UGX has no obligation to accept a BATCH or a portion of a BATCH, if 
such DRUG PRODUCT does not comply with the DRUG PRODUCT SPECIFICATION, the QTA, or was not MANUFACTURED 
in compliance with cGMP and with the MANUFACTURING process.
  Upon  receipt  of  any  BATCH  of  DRUG  PRODUCT,  UGX,  or  its  designee(s),  shall  inspect  such  BATCH  of  DRUG  PRODUCT 
MANUFACTURED  by  BSP  to  ascertain  that  such  BATCH  of  DRUG  PRODUCT  is  free  from  physical  defects  at  the  incoming. 
Should  a  BATCH  of  DRUG  PRODUCT  have  physical  defects,  UGX  shall  promptly  inform  BSP  in  writing  and  within  [***] 
CALENDAR DAYS of the receipt of the affected BATCH of DRUG PRODUCT. Such written notice shall include the reason(s) for
the rejection and to be accompanied with any supporting documentation or other evidence. A shipment of BATCH of 
  
  
  
  
  
  
  
3.
4.
5.
6.
DRUG  PRODUCT  that  is  not  rejected  within  the  term  of  this  Section  10.2  will  be  deemed  accepted  by  UGX  and  the  right  to 
claim  such  defect  shall  be  deemed  waived  by  UGX,  except  if  UGX  discovers  a  LATENT  DEFECT  as  set  forth  under  Section 
10.3 below. 
If, after the RELEASE of a BATCH of DRUG PRODUCT by BSP, either Party discovers a LATENT DEFECT, such Party shall 
notify the other Party in writing within [***] BUSINESS DAYS after such LATENT DEFECT being detected or informed about by 
any  of  the  Parties  or  their  AFFILIATES,  including  THIRD  PARTIES.  THE  RIGHT  TO  CLAIM  A  LATENT  DEFECT  SHALL  BE 
DEEMED LOST IF EXERCISED IN RELATION TO A LATENT DEFECT [***].
In the event UGX notifies BSP, for any reason whatsoever, the rejection of any BATCH of DRUG PRODUCT within the timing set 
forth in this Article 10, the Parties shall run an investigation in accordance with the QTA. 
BSP shall not be responsible for any NON-CONFORMING BATCH, unless  to the extent BSP has caused it, as it results from 
the report of the investigation carried out in accordance with the QUALITY AGREEMENT. UGX will be responsible in any other 
event.
In  the  event  that  Parties  are  not  in  agreement  to  determine  whether  a  BATCH  is  NON-CONFORMING  or  which  Party  is 
responsible  for  the  NON-CONFORMING  BATCH,  the  issue  shall  be  submitted  to  a  THIRD  PARTY  independent  testing 
laboratory, jointly defined by the JOINT STEERING COMMITTEE, to perform any necessary tests and to review records, test 
data  and  other  relevant  information  in  order  to  ascertain  conformity  and/or  responsibility.  The  THIRD  PARTY  independent 
laboratoryshall  execute  an  appropriate  confidentiality  agreement  approved  in  form  and  substance  by  BSP  and  UGX.    Such 
THIRD PARTY’S decision shall be binding on both Parties. The costs of such THIRD PARTY independent laboratory shall be 
borne by the Party found to be at fault with respect to NON-CONFORMING BATCH.
7.
Regardless  of  which  Party  is  responsible  for  any  NON-CONFORMING  BATCH,  unless  otherwise  advised  by  UGX,  BSP  will 
[***]to promptly MANUFACTURE and replace such NON-CONFORMING BATCH, and
10.7.1. If UGX is the Party responsible for such NON-CONFORMING BATCH, then UGX shall:
(i) pay for the NON-CONFORMING BATCH and such replacement DRUG PRODUCT on the [***]  and at the [***]; and 
(ii) bear the disposition costs of the NON-CONFORMING BATCH; and
(iii) have BSP MANUFACTURE the replacement DRUG PRODUCT, provided that UGX shall supply BSP with the sufficient quantity of FOC 
MATERIALS necessary to replace such NON-CONFORMING BATCH, at [***] costs and expenses. 
10.7.2. Subject to Section 16, if BSP is the Party responsible for such NON-CONFORMING BATCH and UGX is willing to be supplied with a 
replacement DRUG PRODUCT BATCH, then, as sole remedies, 
(a) to the extent UGX paid BSP for such NON-CONFORMING BATCH, BSP shall provide such a replacement BATCH of DRUG PRODUCT 
[***], or 
(b) to the extent UGX did not pay BSP for such NON-CONFORMING DRUG PRODUCT, then UGX shall pay only for such a replacement 
DRUG PRODUCT BATCH on the [***] and at the [***] as for the [***], provided that
(c)  in  either  case,  UGX  shall  provide  BSP  with  the  sufficient  quantity  of  FOC  MATERIALS  necessary  to  replace  under  (a)  and  (b)  of  this 
Section  10.7.2  such  NON-CONFORMING  BATCH,  at  [***]  costs  and  expenses  and  BSP  shall  return  or  destroy,  at  [***]  costs,  the  NON-
CONFORMING BATCH as determined by UGX in its sole discretion.
(d) should UGX have (i) not opted for the replacement of NON –CONFORMING BATCH and (ii) [***] for such [***], [***] will [***] (or [***]if [***] 
under Section [***]) equal to [***], excluding [***]].With respect to [[***], [***]may [***] provided by [***] and, in the absence of [***] or[***] or in 
the event that the [***],[***] shall [***] the [***], excluding [***], within [***] CALENDAR DAYS after [***].
8.
NOTWITHSTANDING ANYTHING TO THE CONTRARY IN THIS SECTION 10, BSP WILL [***], ONLY IF [***] WAS CAUSED 
BY [***] IN THE MANUFACTURING OF DRUG PRODUCT AND [***].  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
a.
b.
c.
Notwithstanding  the  foregoing,  UGX  acknowledges  that  whether  BSP  is  engaged  for  the  performance  of  SERVICES, 
which  involve  scientific  experiments  requiring  the  use  of  reasonable  judgment,  any  loss  of  API/DRUG  SUBSTANCE  in
exercising such judgment shall not be regarded as loss due to [***]or [***].
Quality Control testing and analysis of any BATCH of DRUG PRODUCT MANUFACTURED by BSP shall be conducted 
by  a  THIRD  PARTY  independent  laboratory  engaged  by  UGX  and  approved  by  BSP.  Any  different  setting  regarding 
where  to  perform  Quality  Control  testing  and  analysis  of  any  BATCH  of  DRUG  PRODUCT  MANUFACTURED  by  BSP 
shall be discussed and agreed in good faith by the Parties being understood by the Parties that (i) BSP shall be preferred 
to any other THIRD-PARTY independent laboratory, provided BSP’s Quality Control laboratories are considered by UGX 
to have sufficient technical capabilities and the economic offer submitted by BSP is comparable to other offers received by 
UGX, and (ii) in no event UGX shall negotiate and/or engage a THIRD PARTY that has competing business with BSP in 
the field of Drug Product contract manufacturing services.
After  BSP  has  MANUFACTURED  a  minimum  number  of  [***]successful  commercial  production  BATCHES  of  DRUG 
PRODUCT for any single dosage and in the same MANUFACTURING suite, excluding PPQ BATCHES, the Parties will 
agree on the target yield for the DRUG PRODUCT (the “TARGET YIELD”). 
11. Price. Invoice and Payment.
1.
2.
1.
2.
3.
4.
3.
4.
5.
6.
UGX will pay to BSP the MANUFACTURING SERVICE FEE and ADDITIONAL SERVICES fee following the acceptance of an 
OFFER,  which  are  set  out  in  the  PRODUCT  SCHEDULE.  The  MANUFACTURING  SERVICE  FEE  and  ADDITIONAL 
SERVICES  fee    shall  be  subject  to  adjustment  from  time  to  time  in  accordance  with  this  AGREEMENT;  provided  that,  the 
MANUFACTURING SERVICE FEE and ADDITIONAL SERVICES fees may be amended based upon mutual agreement by the 
Parties.
The  MANUFACTURING  SERVICE  FEE  shall  be  adjusted  pursuant  to  the  provisions  of  this  Section  11  and  in  any  of  the 
following events, upon agreement between the Parties in good faith: 
[***]; 
[***];
[***], and
[***].
Effective as of [***] and at the beginning of each subsequent [***] during the TERM of this AGREEMENT, BSP shall be entitled 
to an adjustment to the MANUFACTURING SERVICE FEE and ADDITIONAL SERVICES fees, which adjustment shall be [***] 
in respect of [***] or [***] ([***]%)]. The adjusted MANUFACTURING SERVICE FEE and ADDITIONAL SERVICES fee shall be 
effective as of [***], in which the adjustment is requested and it will be notified by BSP on or about the first [***]of such relevant 
[***]. 
If 
MANUFACTURING  SERVICE  FEE  and  ADDITIONAL  SERVICES 
MANUFACTURING  SERVICES  or  ADDITIONAL  SERVICES  are  subject  to  VAT,  UGX  will  be  charged  for  the  VAT  incurred  in 
addition.
fee  do  not  contain  value-added 
tax  (VAT). 
BSP  will  submit  invoices  to  UGX  upon  RELEASE.Each  invoice  (i)  must  be  submitted  in  compliance  with  any  APPLICABLE 
LAWS  and  any  specific  requirements  in  this  AGREEMENT  and,  (ii)  will  be  accompanied  by  any  information  required  by  this 
AGREEMENT,  including  detailed  information  required  for  import  purposes  and  for  taxable  amounts  applicable  to  the 
MANUFACTURING SERVICE FEE and ADDITIONAL SERVICES fee.
All  undisputed  invoices  will  be  paid  within  [***]  CALENDAR  DAYS  from  the  receipt  of  BSP’s  electronic  invoice,  which  is 
submitted to UGX’s accounts payable department in compliance with the requirements of this AGREEMENT.
  
  
  
  
  
  
  
  
  
  
  
7.
8.
9.
Except for  [***] that are related to the MANUFACTURING process, UGX, in accordance with Section 9.6, shall be responsible 
for paying any costs related to [***] approved by UGX in accordance with this AGREEMENT. 
Payment  will  be  made  in  Euro, net  of  possible  bank  transfer  fees  and  commissions  imposed  by  UGX’s  sending  bank,  to  the 
account designated by BSP.
Duty,  sales,  use  or  excise  taxes  imposed  by  any  governmental  entity  that  apply  to  the  provision  of  MANUFACTURING 
SERVICES and ADDITIONAL SERVICES will be borne by [***](other than taxes based upon the income of BSP). Each Party 
shall  therefore  comply  with  its  applicable  taxation  guidelines  regarding  filing  and  reporting  for  income  tax  purposes.  Neither 
Party shall treat their relationship under this AGREEMENT as a partnership or as a pass-through entity for tax purposes.
12. Records. Audits and Inspections.
1.
2.
3.
4.
5.
At  its  own  expense,  BSP  will  create  and  maintain  accurate  records  related  to  the  MANUFACTURING  SERVICES,  including, 
without  limitation,  reports,  accounts,  notes,  data,  and  records  of  all  information  and  results  (collectively,  the  “RECORDS”).  All 
RECORDS,  to  the  extent  they  are  specific  to  the  DRUG  PRODUCT  and  do  not  contain  or  incorporate  BSP  CONFIDENTIAL 
INFORMATION, BSP INVENTIONS or BSP’s BACKGROUND INTELLECTUAL PROPERTY, will be the sole property of UGX, 
however, BSP shall have the right to retain one (1) copy of these DRUG PRODUCT-specific RECORDS to monitor compliance 
of this AGREEMENT, any of its PRODUCT SCHEDULE, QTA and APPLICABLE LAWS.
All original RECORDS of the development and MANUFACTURE of DRUG PRODUCT hereunder will be retained and archived 
by BSP in accordance with cGMP, APPLICABLE LAW and the QTA (the “RETENTION PERIOD”). In case of conflict the QTA 
shall prevail. Following the RETENTION PERIOD, BSP will not destroy the RECORDS without first giving UGX written notice 
and the opportunity to return the RECORDS at UGX’s expense.
Upon the request of UGX, BSP shall permit to UGX to have access, during the TERM of this AGREEMENT (or, if applicable, 
after the TERM for activities started during the TERM but with effects after such TERM) to financial RECORDS limited to those 
related  to  the  DRUG  PRODUCT  for  the  purpose  of  verifying  the  (i)  compliance  with  the  requirements  of  this  AGREEMENT, 
including APPLICABLE LAW by BSP; (ii) the accuracy of any invoice submitted to UGX. For the avoidance of doubt, UGX or its 
designee may not have copies of such financial records but  UGX  shall  be  permitted  to  examine  such  records  (during  regular 
business  hours)  at  such  place  or  places  where  such  financial  records  are  customarily  kept  and  maintained  by  BSP  for  the 
purpose  of  verifying  the  correctness  of  all  such  calculations  invoiced  by  BSP  hereunder.  Upon  request,  BSP  agrees  to  share 
with  UGX  in  a  secure  password-protected  digital  data  repository  the  certificate  issued  by  a  reputable  accounting  firm,  which 
ascertains  the  accuracy  of  BSP’s  annual  balance  sheet,  as  well  as  the  key  financial  data  supporting  BSP’s  independent 
auditor’s report, provided that UGX shall keep such certificate strictly confidential with the prohibition of disclosure it to any third 
party without BSP’s prior written consent. 
UGX has the right to audit and inspect the FACILITY, equipment, materials and RECORDS as required by cGMP guidelines, this 
AGREEMENT and the QTA.
At  reasonable  times,  upon  reasonable  advance  written  notice  and  subject  to  compliance  with  all  applicable  confidentiality 
provisions herein, UGX may request to perform cGMP audits at the FACILITY and BSP shall permit for such audits as outlined 
in  the  QTA.  UGX  and  its  duly  authorized  representatives  may  have  access  together  with  a  BSP  employee  to  the  FACILITY, 
during  operational  hours  and  during  active  MANUFACTURING,  to  enter  and  inspect  any  premises  and  MANUFACTURING 
SERVICES  and/or  ADDITIONAL  SERVICES  to  ascertain  compliance  by  BSP  with  the  terms  of  this  AGREEMENT.  BSP  will 
cooperate with UGX to facilitate the evaluation and inspection, and provide reasonable assistance to UGX. UGX will reasonably 
cooperate with BSP to mitigate disruption to BSP’s operations. Scope and further details are set forth in the QTA attached to 
Appendix  III  of  this  AGREEMENT.  It  is  understood  by  the  Parties  that  UGX  may  be  accompanied  by  or  delegate  to  THIRD 
PARTY’s representatives the performance of such cGMP audits; provided that such THIRD PARTY’s representatives shall (i) be 
bound by confidentiality obligations toward BSP no less stringent than those identified in this AGREEMENT and (ii) finalize a 
three-way confidentiality agreement which shall be accepted by all contracting parties.
  
  
  
  
  
  
  
  
  
6.
7.
8.
UGX and/or its designees may perform for-causeaudits as outlined in the QTA. BSP shall make the FACILITY and the relevant 
personnel involved in the performance of MANUFACTURING SERVICE and ADDITIONAL SERVICES under this AGREEMENT 
available, within reasonable business hours, for the purpose of any UGX audits. 
BSP  shall  promptly  inform  UGX  of  any  inspections  by  competent  regulatory  authorities  at  the  FACILITY  which  affects  the 
MANUFACTURE  of  DRUG  PRODUCT  under  this  AGREEMENT,  within  the  terms  provided  in  the  QTA.  In  the  event  that  the 
inspection reveals that BSP is not in compliance with the APPLICABLE LAWS and applicable regulatory regulations, including 
cGMP,  and  receives  written  observations  (or  any  other  written  communication)  by  such  REGULATORY  AUTHORITY  which 
involve the DRUG PRODUCT, BSP shall (i) use its best efforts to cure such non-compliance within the timing required by the 
REGULATORY AUTHORITY at [***] costs and expenses, (ii) inform UGX of any proposed written response by BSP to any such 
inspection,  and  (iii)  provide  UGX  with  copies  of  all  documentation  within  the  terms  provided  in  the  QTA.  UGX  will  have  the 
opportunity to review and provide input to the response to BSP as promptly as practicable and in accordance with the QTA. 
BSP  agrees  that,  at  UGX’s  option,  up  to  [***]PERSONS  IN  PLANT  may  be  present  at  the  FACILITY  during  the 
MANUFACTURING for the purposes of check weighing and documenting MANUFACTURING and all associated RECORDS in 
connection therewith. Any PERSON IN PLANT who are present at the FACILITY, shall comply with BSP’s site regulations, SOPs 
and rules. 
13.
Intellectual Property.
a.
b.
c.
d.
e.
Neither  Party  shall,  as  a  result  of  this  AGREEMENT,  acquire  any  right,  title,  or  interest  in  any  INTELLECTUAL 
PROPERTY RIGHTS that the other Party owns or controls as of the EFFECTIVE DATE of this AGREEMENT, or that the 
other  Party  obtains  ownership  or  control  of  separately  and  apart  from  the  performance  of  the  MANUFACTURING 
SERVICES and ADDITIONAL SERVICES under this AGREEMENT and without the use of the other Party’s Confidential 
Information (“BACKGROUND INTELLECTUAL PROPERTY”). 
For the TERM, UGX hereby grants to BSP, a limited, non-exclusive, fully paid-up, royalty-free, non-transferable license to 
use UGX BACKGROUND INTELLECTUAL PROPERTY related to the DRUG PRODUCT that BSP is required to use in 
order to perform the SERVICES (as specified in the PRODUCT SCHEDULE) solely for the purpose of this AGREEMENT.
UGX  shall  own  exclusively  all  rights,  titles,  and  interests  in  any  and  all  INVENTIONS  directly  related  to  the  DRUG 
PRODUCT,  MANUFACTURE  of  DRUG  PRODUCT  or  UGX's  BACKGROUND  INTELLECTUAL  PROPERTY  and  which 
result  from  use  of  UGX's  CONFIDENTIAL  INFORMATION  and/or  FOC  MATERIALS,  but  excluding  BSP  INVENTIONS 
and  BSP’s  BACKGROUND  INTELLECTUAL  PROPERTY  (collectively,  “UGX  INVENTIONS”).  BSP  hereby  assigns,  and 
commits to assign, all right, title and interest in to UGX INVENTIONS to UGX
Notwithstanding  the  foregoing,  BSP  shall  own  all  rights,  titles  and  interests  in  any  BSP  INVENTIONSand  UGX  hereby 
assigns  all  right,  title  and  interest  in  BSP  INVENTIONS  to  BSP.  As  used  herein,  “BSP  INVENTIONS”  means  any 
IMPROVEMENTS  to  BSP’sBACKGROUND  INTELLECTUAL  PROPERTY  developed,  conceived,  invented,  reduced  to 
practice  or  made  solely  by  BSP  in  the  course  of  performance  of  the  MANUFACTURING  SERVICES  and  ADDITIONAL 
SERVICES, which relate to BSP’s line of business or the way BSP performs its services, and which do not use or include 
INVENTIONS  and  UGX’s  CONFIDENTIAL 
any  UGX’s  BACKGROUND 
INFORMATION or any other property of UGX.
INTELLECTUAL  PROPERTY,  UGX 
BSP  commits  to  promptly  inform  UGX  according  to  section  23.4  (NOTICE  SECTION)  of  any  violation  of  UGX’s 
BACKGROUND INTELLECTUAL PROPERTY and UGX INVENTIONS and further agrees, at UGX`s expense, to (i) assist 
UGX  or  its  designee(s)  under  APPLICABLE  LAWs,  in  obtaining,  maintaining,  defending  and  enforcing  patents  and  all 
other instruments in nature of patents with respect to any UGX’s BACKGROUND INTELLECTUAL PROPERTY and UGX 
INVENTIONS, (ii) provide assistance and execute such documents as UGX or its designee(s) may request from time to 
time, and (iii) confirm the assignments hereunder. For clarity, UGX or its designee(s) shall be the only Party responsible 
for  filing,  prosecuting  and  maintaining  any  patent  application  covering  UGX  INVENTIONS  and  UGX’s  BACKGROUND 
INTELLECTUAL PROPERTY 
  
  
  
  
  
  
  
  
f.
g.
h.
i.
BSP hereby grants to UGX a perpetual, non-exclusive, non transferable, royalty-free, fully paid-up, worldwide rights to use 
any  and  all  of  BSP  INVENTIONS  solely  for  the  development,  MANUFACTURING,  formulation,  packaging,  importation, 
use, marketing, distribution and sale of DRUG PRODUCT, unless expressly otherwise agreed upon by the Parties. Such 
rights  shall  be  sublicensable  by  UGX  to  its  AFFILIATES,  licensees  or  collaboration  partners  only  for  the  same  limited 
purposes set forth in this Section 13.6, provided that (i) UGX has promptly notified BSP in writing about such sublicense, 
and  (ii)  the  AFFILIATE,  licensee  or  collaboration  partner  has  first  agreed  in  writing  to  maintain  BSP  INVENTIONS  in 
confidence  throughout  a  confidentiality  agreement  among  the  Parties  and  such  AFFILIATE,  licensee  or  collaboration 
partner.
BSP  will  not  knowingly  utilize  in  the  performance  of  the  MANUFACTURING  SERVICES  and  ADDITIONAL  SERVICES 
under  a  PRODUCT  SCHEDULE  or  incorporate  into  the  DRUG  PRODUCT  or  INVENTIONS  any  proprietary  rights  of  a 
THIRD  PARTY  except  as  BSP  is  permitted  to  do  it  without  further  compensation  by  UGX  to  BSP  or  any  other  THIRD 
PARTY. If the performance of this AGREEMENT requires the use of IP RIGHTS of a THIRD-PARTY, UGX hereby grants 
to  or  procures  for  BSP  the  necessary  rights  of  use  to  these  IP  RIGHTS  solely  for  the  performance  of  the 
MANUFACTURING SERVICES and ADDITIONAL SERVICES and provided that the Parties enter in a license agreement 
with such THIRD PARTY to regulate the use of IP RIGHTS of THIRD-PARTY.
All  documents  that  BSP  receives  from  UGX  for  the  fulfillment  of  the  MANUFACTURING  SERVICES  and  ADDITIONAL 
SERVICES,  which  contain  UGX  CONFIDENTIAL  INFORMATION,  UGX  INVENTIONS  or  UGX  BACKGROUND 
INTELLECTUAL PROPERTY, shall remain the property of UGX.
Each Party shall be obliged to acquire the INVENTIONS and rights on the respective BACKGROUND INTELLECTUAL 
PROPERTIES, as applicable, made under this AGREEMENT of its employees, consultants, agents and representatives 
to the extent necessary to secure the other Party’s rights set out in this section. 
1.
Indemnification.
a.
EachParty  shall  indemnify,  defend  and  hold  the  other  Party  and  its  AFFILIATES,  officers,  employees  and  agents 
(collectively  the  “INDEMNITEES”  and  each  an  “INDEMNITEE”)  harmless  from  and  against  any  and  all  losses,  costs, 
damages, fees or expenses (“LOSSES”) incurred and suffered by a Party’s INDEMINITEE in connection with or arising 
out of any THIRD-PARTY claims, demands, suits, proceedings or causes of actions (“CLAIM”) to the extent arising out of:  
1.
2.
3.
the  material  breach  by  such  Party  of  the  provisions  of  this  AGREEMENT,  including  any  covenants,  representations  and 
warranties set forth herein;
the gross negligence or willful misconduct of such Party in the performance of any obligations under this AGREEMENT;
the infringement or misappropriation of the IP RIGHTS of a THIRD PARTY in connection with the use by a PARTY of the other 
Party’s IP rights.
With respect to each Party, the indemnification obligations set forth in this Section 14.1 shall not apply to the extent that the LOSSES are the 
result of (i) a material breach of this AGREEMENT (including a breach of any representation, warranty or covenant) by the other Party, or (ii) 
the [***] of the other Party’s INDEMNITEES, or (iii) for which the other Party is obligated to [***] as set forth in Sections [***], [***] and [***] 
below].
b.
A Party seeking indemnification under this Section 14 (the “INDEMNIFIED PARTY”)in respect of a THIRD PARTY CLAIM, 
shall give to the other Party from which recovery is sought (the “INDEMNIFYING PARTY”) prompt written notice of any 
LOSSES  or  the  discovery  of  any  fact  upon  which  the  INDEMNITEE(S)  intends  to  base  an  indemnification  request 
pursuant to section 14.1 (“INDEMNIFICATION NOTE”); provided, however, that failure to give such INDEMNIFICATION 
NOTE  will  not  relieve  the  INDEMNIFYING  PARTY  of  its  obligations  under  this  Article  14  except  to  the  extent  that 
INDEMNIFYING  PARTY  is  materially  prejudiced  by  such  failure.  Each  INDEMNIFICATION  NOTE  must  contain  a 
description of the CLAIM and the nature and the amount of such LOSS (to the extent that the nature and the amount are 
known at such time). Together with the INDEMNIFICATION NOTE, the INDEMNIFIED PARTY shall 
  
  
  
  
  
  
  
  
  
furnish promptly to the INDEMNIFYING PARTY copies of all the notices and documents (including court papers) received 
by the INDEMNITEE(S) in connection with CLAIM. The INDEMNIFYING PARTY shall not be obligated to indemnify the 
INDEMNITEE to the extent any admission or statement made by the INDEMNITEE materially prejudices the defense of 
such CLAIM. If practicable, the INDEMNIFYING PARTY shall promptly send a copy of the INDEMNIFICATION NOTE to 
its relevant insurers and shall permit them to exercise rights of subrogation, if it is permitted by APPLICABLE LAW.
c.
d.
Without limiting the foregoing, at its option the INDEMNIFYING PARTY may assume control of the defense of any such 
CLAIM  by  giving  written  notice  to  the  INDEMNIFIED  PARTY  within  [***]  CALENDAR  DAYS  after  the  receipt  of  an 
INDEMNIFICATION NOTE by INDEMNIFIED PARTY. The INDEMNIFYING PARTY will have the right to solely defend the 
THIRD-PARTY  CLAIM;  provided,  however,  that  such  settlement  does  not  adversely  affect  the  INDEMNIFIED  PARTY’s 
rights or obligations hereunder or admit liability on INDEMNIFIED PARTY’s part. The INDEMNIFYING PARTY agrees not 
to  enter  into  any  settlement  which  would  have  a  material  adverse  effect  on  the  INDEMNITEE(S)  without  prior  to  the 
written  consent  of  the  INDEMNITEE(S),  which  consent  shall  not  be  unreasonably  withheld.  The  INDEMNIFIED  PARTY 
and/or  any  relevant  INDEMNITEE  will  reasonably  cooperate  with  the  INDEMNIFYING  PARTY  and  its  legal 
representatives in the investigation and defense of any THIRD-PARTY CLAIM and may choose, in their sole discretion, to 
be  represented  by  counsel  of  its  own  selection  and  at  its  own  expense  in  or  with  respect  to  any  such  THIRD-PARTY 
CLAIM.  The  indemnification  under  this  ARTICLE  14  shall  not  apply  to  amounts  paid  with  respect  to  settlement  of  any 
THIRD-PARTY  CLAIM  if  such  settlement  is  effected  without  the  prior  written  consent  of  THE  INDEMNIFYING  PARTY, 
which consent will not be unreasonably withheld or delayed. 
If  the  INDEMNIFYING  PARTY  chooses  not  to  take  control  of  the  defense  or  prosecute  any  CLAIM,  the  INDEMNIFIED 
PARTY  shall  retain  control  of  the  defense  thereof,  but  no  INDEMNIFIED  PARTY  or  INDEMNITEE(S)  shall  admit  any 
liability  with  respect  to,  or  settle,  compromise  or  discharge,  any  such  CLAIM  without  the  prior  written  consent  of  the 
INDEMNIFYING PARTY, which consent shall not be unreasonably withheld or delayed.
1. General Representation and Warranties.
a.
Each Party represents and warrants to the other Party that:
i.
ii.
iii.
iv.
v.
vi.
It is a corporation duly organized, validly existing and in good standing under the laws and regulations of the state 
in which it is incorporated.
It has the corporate power and authority and the legal right to enter into this AGREEMENT and any and all of this 
Annexes and to perform its obligations hereunder.
This AGREEMENT, when executed and delivered by such Party in accordance with the provisions hereof, will be a 
legal,  valid  and  binding  obligation  of  such  Party,  enforceable  against  such  Party  in  accordance  with  its  terms, 
except  as  such  enforceability  may  be  limited  by  applicable  bankruptcy,  insolvency,  moratorium,  reorganization  or 
similar laws affecting the enforcement of creditors’ rights generally and by general principles of equity.
No  contract,  agreement,  promise,  undertaking  or  other  fact  or  circumstance  prevent  the  performance  of  the 
obligations under this AGREEMENT.
The execution and delivery of this AGREEMENT and the performance of the Party’s obligations hereunder do not 
conflict  with  or  violate  any  requirement  of  APPLICABLE  LAWS,  and  do  not  conflict  with,  or  constitute  a  default 
under, any contractual obligation of such Party.
At the EFFECTIVE DATE, itself, its directors, officers or employees have not offered, promised, given, authorized, 
solicited or accepted an undue pecuniary or other advantage of any kind (or implied that they will or might do any 
such thing at any time in the future) in any way connected with the AGREEMENT and that it 
  
  
  
  
  
  
  
  
  
  
1.
2.
3.
4.
5.
6.
7.
8.
9.
1.
2.
3.
4.
5.
has taken reasonable measures to prevent subcontractors, agents or any other third parties, subject to its control or 
determine influence, from doing so in accordance to any APPLICABLE LAW.
b.
BSP’s Representations and Warranties. In addition to the provision of Section 15.1., BSP represents and warrants that:
The MANUFACTURING SERVICES and ADDITIONAL SERVICES will be performed in a safe and ethical manner with requisite 
care,  skill  and  diligence,  in  accordance  with  the  APPLICABLE  LAWS,  industry  standards  and  this  AGREEMENT,  and  by 
individuals who are appropriately trained and qualified.
the  DRUG  PRODUCT  MANUFACTURED  under  this  AGREEMENT  (including  all  MANUFACTURING  SERVICES  and  BSP’s 
employment  practices)  complies  with  cGMP  (if  applicable),  the  MANUFACTURING  process,  the  QTA  and  DRUG  PRODUCT 
SPECIFICATIONS, and (ii) will not be adulterated or misbranded under the United States Federal Food, Drug and Cosmetic Act 
(the “FDCA”) or all APPLICABLE LAW.
BSP  has  obtained  all  permits,  licenses  and  other  authorizations,  which  are  required  under  APPLICABLE  LAW  to 
MANUFACTURE and deliver the DRUG PRODUCT.  BSP is in compliance with, and during the TERM of this AGREEMENT will 
take all actions necessary to comply, with all terms and conditions of any and all required permits, licenses and authorizations 
applicable to the MANUFACTURE and supply of DRUG PRODUCT.
BSP  shall  not  subcontract  any  performance  of  this  AGREEMENT  to  any  other  THIRD  PARTY  without  UGX’s  prior  written 
consent.
The DRUG PRODUCT is free from defects in material and workmanship.
The DRUG PRODUCT is free from all liens, CLAIMS and encumbrances.  
BSP  has  the  right  to  make  any  grants  of  BSP  INVENTION  that  it  makes  or  is  required  to  make  under  Section  13.6  of  this 
AGREEMENT.
To  the  best  of  BSP’s  knowledge,  the  DRUG  PRODUCT  does  not  infringe  any  INTELLECTUAL  PROPERTY  RIGHTS  of  any 
other THIRD PARTY, and any use thereof by UGX consistent with this AGREEMENT does not infringe such rights.
it  does  not  and  shall  not  employ,  contract  with  or  retain  any  person  directly  or  indirectly  to  perform  MANUFACTURING 
SERVICES  and/or  ADDITIONAL  SERVICES  Services  under  this  AGREEMENT  if  such  person  is  debarred  under  21  U.S.C. 
335a  (a)  or  (b)  or,  if  agreed  by  the  Parties,  other  equivalent  laws,  rules,  regulations  or  standards  of  any  other  relevant 
jurisdiction.
c.
UGX’s Representations and Warranties. In addition to the provision of Section 15.1, UGX represents and warrants that:
All  FOC  MATERIALS  provided  to  BSP  conform  and  will  conform  to  the  FOC  MATERIALS  SPECIFICATIONS  and  such  FOC 
MATERIALS  have  been  manufactured  in  compliance  with  applicable  cGMP  and  all  APPLICABLE  LAWS  and  shall  not  be 
adulterated at any time prior to delivery to BSP.
UGX has the right to make any grants of UGX INTELLECTUAL PROPERTY RIGHTS to the DRUG PRODUCT(S) it makes or is 
required to make under the AGREEMENT.
To  the  best  of  UGX’s  knowledge,  the  DRUGPRODUCT(S)  and  deliverables  do  not  infringe  any  INTELLECTUAL  PROPERTY 
RIGHTS  of  any  other  THIRD  PARTY,  and  any  use  thereof  by  BSP  consistent  with  this  AGREEMENT  does  not  infringe  such 
rights.
Neither  UGX  nor  any  other  THIRD  PARTY  who  performs  any  obligation  of  UGX  under  the  AGREEMENT  is  prohibited  from 
doing so by any: (i) APPLICABLE LAW; (ii) covenant not to compete;(iii) contract to deal exclusively with another THIRD PARTY; 
or (iv) other legal or professional obligation or restriction.
The  performance  of  UGX's  responsibilities  under  the  AGREEMENTand  UGX's  use  of  the  MANUFACURING  SERVICES  and 
DRUGPRODUCT comply with all APPLICABLE LAW.
d.
Disclaimer of Warranties. EXCEPT  AS  EXPRESSLY  SET  FORTH  IN  THIS  AGREEMENT,  NEITHER  PARTY  MAKES 
NO  WARRANTY  OF  ANY  KIND,  EITHER  EXPRESSED  OR  IMPLIED,  BY  FACT  OR  LAW,  OTHER  THAN  THOSE 
EXPRESSLY SET 
  
  
  
  
  
FORTH IN THIS AGREEMENT, INCLUDING, BUT NOT LIMITED TO, WARRANTY OF FITNESS FOR A PARTICULAR 
PURPOSE OR WARRANTY OF MERCHANTABILITY OR NON-INFRINGEMENT.
1.
Limitation of Liability.
a.
b.
c.
d.
Subject to Section 16.2 and except for those obligations of BSP under Section 10, as sole remedy for UGX, in case of 
replacement of Non-Conforming BATCH for BSP's fault, BSP’s maximum annual liability under this AGREEMENT for any 
reason whatsoever resulting from a breach of its representations, warranties or other obligations under this AGREEMENT 
shall not exceed [***] pursuant to Section [***].  
The limitation under this Section 16 does not apply in case of liability arising out of [***], [***]or [***] of or [***] and [***] 
under Section[***] by any of the Party. 
EACH PARTY EXCLUDES ANY LIABILITY FOR SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL OR PUNITIVE 
AND  EXEMPLARY  DAMAGES,  RECALL  COSTS,  LOSS  OF  PROFIT  ARISING  OUT  OF  OR  RELATED  TO  THIS 
AGREEMENT  OR  THE  EXERCISE  OF  ITS  RIGHTS  HEREUNDER,  HOWEVER  CAUSED,  PROVIDED  THAT  SUCH 
DAMAGES  HAVE  NOT  BEEN  CAUSED  BY  THE  OTHER  PARTY’S  [***]  OR  [***],  BREACH  OF  [***]  AND  [***]  IN 
SECTION [***] OR [***] PURSUANT TO SECTION [***].
If  BSP’s  cooperation  is  required  in  administrative  procedures,  especially  in  procedures  of  admission,  customs  or  of 
importation, UGX indemnifies BSP from any liability which may arise out of this cooperation, except to the extent arising 
from BSP`s [***]or [***]. 
Insurance.
Either  Party  shall,  at  its  sole  cost  and  expense,  obtain  and  maintain  in  force  for  the  TERM  of  the  AGREEMENT  and  for  [***] 
triggered  in  compliance  with  Section  20,  adequate  and  suitable  insurance  in  the  minimum  amounts  set  forth  below  with  a 
reputable insurance company to cover its liability under this AGREEMENT.
UGX  will  maintain  a  comprehensive  product  liability  insurance,  with  combined  single  limits  of  [***]  USD  for  each  claim  with 
respect to personal injury and/or damage to property and [***] USD aggregate.
BSP  will  maintain  comprehensive/general 
to 
MANUFACTURING  SERVICES  and  ADDITIONAL  SERVICES  toward  UGX,  with  combined  single  limits  of  [***]  USD  for  each 
claim with respect to personal injury and/or damage to property and [***]USD in aggregate.
liability,  with  respect 
insurance  coverage 
include  BSP’s 
liability 
to 
For the avoidance of any doubt, each Party is allowed to change the insurer anytime, provided that all the conditions described 
in this Section 17 are properly met.
Upon UGX’s request, BSP will provide UGX with a certificate of insurance evidencing the insurance coverage specified in this 
section.  
 BSP shall not maintain specific insurance coverage for the FOC MATERIALS, which insurance coverage shall be obtained by 
UGX.  For  the  sake  of  clarity,  notwithstanding  the  foregoing,  such  FOC  MATERIALS  while  in  the  care,  custody  and  control  of 
BSP shall remain covered under [***] policy.
1.
1.
2.
3.
4.
5.
6.
2. Confidential Information.
a.
CONFIDENTIAL INFORMATION means any and all confidential and proprietary information of the Parties, which is not 
included in the exceptions set forth in Section 18.4, and whether disclosed in oral, written, visual, electronic or 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
INTELLECTUAL  PROPERTY,  UGX 
other  forms,  and  which  either  Party  or  its  personnel  observes  or  learns  in  connection  with  this  AGREEMENT  or  any 
SERVICES  performed  hereunder,  or  in  negotiation  of  this  AGREEMENT.  Confidential  information  may  also  include 
without  limitation:  (i)  business  plans,  strategies,  forecasts,  projects  and  analyses,  results,  records,  either  Party’s 
BACKGROUND 
this 
AGREEMENT;  (ii)  financial  information,  fee  structures  and  pricing;  (iii)  business  processes,  methods  and  models;  (iv) 
personnel  and  supplier  information;  (v)  deliverables  and  work  DRUG  PRODUCT;  (vi)  DRUG  PRODUCT,  service 
specifications,MANUFACTURING or professional services proposals and other information relating to MANUFACTURING 
capabilities and operation; (vii) MANUFACTURING, purchasing, logistics, sales and marketing information; (viii) the terms 
and  conditions  of  this  AGREEMENT  and  (ix)  personally  identifiable  information  as  to  any  individual  involved  in  the 
provision  of  MANUFACTURING  SERVICES  and  ADDITIONAL  SERVICES,  including  medical  or  religious  status  or 
preference  and  their  nationality  (collectively  “CONFIDENTIAL  INFORMATION”).    Each  Party  acknowledges  the 
confidential, proprietary, and secret character of the CONFIDENTIAL INFORMATION.  Additionally, either Party agrees to 
keep any CONFIDENTIAL INFORMATION subject to the same use and disclosure limitations, as set forth in this Section 
18 during the TERM of this AGREEMENT and for [***] years following termination or expiration thereof.
INVENTIONS  generated  under 
INVENTIONS,  BSP 
b.
c.
Each of the Parties will keep the CONFIDENTIAL INFORMATION of the respective other Party secret. Parties will use the 
CONFIDENTIAL INFORMATION only for the purposes of performing SERVICES, obligations and exercising rights under 
this  AGREEMENT  and  not  disclose  such  CONFIDENTIAL  INFORMATION  to  any  THIRD-PARTY  without  the  prior 
consent of the other Party.
Each  Party  shall  limit  the  disclosure  of  the  otherParty's  CONFIDENTIAL  INFORMATION  to  its  AFFILIATES,  officers, 
employees  ,  who  reasonably  require  to  access  to  such  CONFIDENTIAL  INFORMATION  on  a  need-to-know  basis  and 
only  for  the  purpose  to  performMANUFACTURING  SERVICES  and  ADDITIONAL  SERVICES  under  this  AGREEMENT 
The receiving Party will use its reasonable efforts to ensure that any AFFILIATE, employee or officer to which it discloses 
CONFIDENTIAL  INFORMATION  will  be  under  confidentiality  and  non-use  obligations  as  stringent  as  those  contained 
herein.
d.
The provisions of this Section 18 do not apply to information which receiving Party proves that:
1.
2.
3.
4.
the receiving Party already knew at the time of disclosure, other than by breach of this AGREEMENT by the receiving Party; or
is or becomes public knowledge after disclosure by the disclosing Party, other than through the receiving Party's breach of this 
AGREEMENT; or
the  receiving  Party  receives  in  good  faith  from  a  THIRD-PARTY  not  in  violationof  an  obligation  of  confidentiality  toward  the 
disclosing Party; or
the  receiving  Party  independently  develops  or  discovers  the  information  without  use  of  or  reference  to  the  Confidential 
Information of disclosing Party, as evidenced by receiving Party’s written records.
e.
f.
g.
For the avoidance of doubt, no provision in this AGREEMENT shall restrict each Party's right to disclose the existence of 
a business relationship between the Parties to potential other customers, provide that the affected Party shall require the 
prior written consent of the other Party before any of such disclosure and the consent will not be unreasonably withheld or 
delayed.
Notwithstanding  anything  herein  to  the  contrary,  each  receiving  Party  may  disclose  the  Confidential  Information  to  the 
extent it is legally compelled to disclose it, provided, however, that prior to any such compelled disclosure, the receiving 
Party shall give the disclosing Party reasonable advance notice of any such disclosure and shall cooperate in protecting 
against the disclosure and/or obtaining a protective order narrowing the scope of such disclosure of the CONFIDENTIAL 
INFORMATION.
Each  Party  may  retain  one  (1)  copy  of  CONFIDENTIAL  INFORMATION,  and  use  this  archive  copy  to  comply  with  the 
APPLICABLE  LAW,  and  tax  law  provisions  and  to  ensure  and  verify  the  continued  compliance  with  the  obligations 
undertaken hereunder.
  
  
  
  
  
  
  
  
h.
Notwithstanding anything to the contrary in this AGREEMENT, upon written request of the disclosing Party, the receiving 
Party  shall  return  to  the  disclosing  Party  or  destroy,  at  disclosing  Party  sole  option  and  expenses,  all  CONFIDENTIAL 
INFORMATION,  together  with  copies  thereof,  provided that  the  disclosing  Party  shall  not  require  the  receiving  Party  to 
destroy or return the CONFIDENTIAL INFORMATION stored securely by receiving Party during automatic system back-
up in accordance with receiving Party’s internal IT procedures.
3.
Force Majeure.
1.
2.
Except  for  due  payment  obligations,  neither  Party  is  liable  to  the  other  Party  for  failure  or  delay  in  performing  its  obligations 
under  this  AGREEMENT  to  the  extent  and  for  so  long  as  such  failure  or  delay  results  from  causes  beyond  the  reasonable 
control  of  such  Party  including  fires,  earthquakes,  floods,  natural  disasters,  embargoes,  wars,  acts  of  war  (whether  war  is 
declared  or  not),  terrorist  acts,  insurrections,  riots,  civil  commotion,  strikes,  lockouts,  epimedics/pandemics,  or  other  labor 
disturbances,  acts  of  God  or  government  acts,  sabotage  and  acts  of  terrorism,  cyberattacks,  lack  of  or  inability  to  obtain 
sufficient fuel, power or components, materials, labor containers, interruption of or delay in transportation, supplies or defective 
equipment, breakage or failure of machinery or apparatus, excluding breakage for lack of or inadequate maintenance (each, a 
“FORCE MAJEURE EVENT”). In the event of the occurrence of FORCE MAJEURE EVENT, each Party must promptly notify the 
other  Party  and  will  use  its  [***]  to  avoid,  mitigate  or  remove  the  FORCE  MAJEURE  EVENT.  Notwithstanding  the  foregoing, 
should  UGX  have  technical  difficulties  to  authorize  or  release  the  payments  to  BSP  to  fulfill  its  obligations  due  to  a  FORCE 
MAJEURE EVENT, the Parties shall meet in good faith and use their best efforts to set up a payment plan.
Such excuse shall continue as long as the FORCE MAJEURE EVENT continues, provided that, upon cessation of such FORCE 
MAJEURE EVENT, the affected Party shall promptly resume its performance and obligation hereunder. If the Party is unable to 
resume its performance and obligation under this AGREEMENT, such Party shall prompt notify the other Party of its inability and 
the Parties shall meet promptly to determine an equitable solution to the effects of any such FORCE MAJEURE EVENT.
4.
Term and Termination.
a.
b.
a.
Term.  This  AGREEMENT  effectiveness  starts  with  the  EFFECTIVE  DATE  and  will  expire,  if  not  terminated  earlier  in 
accordance with this Section 20, [***]) CALENDAR YEARS thereafter] (“TERM”). This AGREEMENT will be automatically 
extended for another [***]-year period following the first [***] TERM (each, a “RENEWAL TERM”), unless a Party provides 
written  termination  notice  of  its  intent  to  not  renew  the  AGREEMENT  at  least  [***]  CALENDAR  MONTHS  prior  to  the 
expiry  of  the  initial  TERM  or  any  further  RENEWAL  TERM.   If  this  AGREEMENT  is  terminated  in  its  entirety,  then  all 
PRODUCT  SCHEDULE  also  will  terminate.  The  termination  of  one  PRODUCT  SCHEDULE  shall  not  affect  any  other 
PRODUCT SCHEDULE or the AGREEMENT.
Termination.In addition to any other provision of this AGREEMENT or a PRODUCT SCHEDULE expressly providing for 
termination of this AGREEMENT or such PRODUCT SCHEDULE, this AGREEMENT or a PRODUCT SCHEDULE may 
be terminated as follows:
This AGREEMENT or a PRODUCT SCHEDULE might be terminated by either Party without cause with [***] CALENDAR 
MONTHS’ notice period for termination to the other Party. 
b.
Each Party shall be entitled to terminate this AGREEMENT with immediate effect if:
i.
ii.
 any obligation provided in this AGREEMENT or PRODUCT SCHEDULE is materially breached by the respective 
other  Party  and/or  its  AFFILIATES  and  is  not  cured  or  attempted  to  cure  within  [***]CALENDAR  DAYS  of  written 
notice thereof;
  MATERIAL  CHANGE  in  CONTROL  of  the  respective  other  Party  which  affects  such  Party`s  ability  to  fulfill  its 
contractual obligations hereunder. In such event, the affected Party will have the one-time right, exercisable 
  
  
  
  
  
  
  
  
  
within  [***]  calendar  days  after  such  MATERIAL  CHANGE  in  CONTROL,  to  terminate  this  Agreement  upon  prior 
written notice to the non-affected Party.
c.
d.
e.
f.
g.
UGX shall be entitled to terminate this AGREEMENT with immediate effect if BSP fails to maintain the necessary rights, 
permits and approvals to perform the SERVICE under this AGREEMENT. 
UGX  may  terminate  this  AGREEMENT  in  its  entirety  or  any  relevant  PRODUCT  SCHEDULE  with  immediate  effect,  at 
UGX’s  option,  in  case  UGX  fails  to  obtain  the  regulatory  approval  of  the  DRUG  PRODUCT  from  any  health  authority 
globally.  In  case  of  termination  pursuant  to  this  Section  20.2.4,  UGX  shall  compensate  BSP  only  for  [***],  determined 
pursuant to Section [***], and those [***] at an amount equal to [***] of the [***].
Either  Party  may  terminate  in  the  event  for  FORCE  MAJEURE  EVENT  lasting  longer  than  [***]  consecutive  [***]  as 
provided in Section 19. 
Either  Party  may  terminate  this  AGREEMENT  in  its  with  immediate  effect  in  accordance  with  the  provisions  of  Section 
23.5.
If  a  Party  becomes  bankrupt,  makes  an  assignment  for  the  benefit  of  creditors,  or  has  a  trustee  appointed  for  all  or 
substantially all of that Party’s property, or if any case or proceeding will have been commenced or other action taken by 
or  against  that  Party  in  bankruptcy  or  seeking  reorganization,  liquidation,  dissolution,  winding-up,  arrangement, 
composition or readjustment of its debts or any other relief under any bankruptcy, insolvency or reorganization or other 
similar  act  of  law  of  any  jurisdiction  now  or  hereafter  in  effect  (any  such  event  or  proceeding,  a  “BANKRUPTCY”),  the 
other  Party  will  have  the  right  to  terminate  this  AGREEMENT  and/or  any  PRODUCT  SCHEDULE  hereto  immediately 
upon prior written notice to the Party in BANKRUPTCY.
c.
 Ban, Withdrawal, Discontinuation of Products. 
1.
2.
If  (i)  any  DRUG  PRODUCT  is  withdrawn  by  a  REGULATORY  AUTHORITY,  or  (ii)  UGX  withdraws  any  DRUG  PRODUCT 
voluntarily  from  the  market  in  all  countries,  UGX  must  notify  BSP  to  immediately  cease  MANUFACTURE  of  the  applicable 
DRUG PRODUCT. 
If UGX requests cessation of MANUFACTURE of a DRUG PRODUCT in connection with the occurrence of an event described 
in Section 20.3.1 that is not due to BSP’s fault to comply with the provisions of this AGREEMENT and the relevant PRODUCT 
SCHEDULE,  UGX  shall  pay  BSP  an  amount  equal  to  [***]%  of  the  SERVICE  FEE  of  such  cancelled  quantities  of  DRUG 
PRODUCT as set forth in the BINDING FORECAST. Alternatively, if applicable, UGX may request that BSP MANUFACTURES 
[***]  In  such  a  case,  the  Parties  shall  meet  either  in  person  or  by  teleconference  and  discuss  in  good  faith  the  terms  of  the 
transfer,  the  equivalence  and  compensation  with  respect  to  the  non-absorbed  capacity.  Notwithstanding  anything  of  the 
foregoing, should BSP be [***] by using its [***] and to the extent consistent with BSP’s obligations [***], then [***].
d.
If  UGX  elects  to  MANUFACTURE  a  DRUG  PRODUCT,  or  to  have  a  DRUG  PRODUCT  MANUFACTURED  by  another 
manufacturer,  BSP  will  provide  [***]  to  assist  UGX  with  all  activities  necessary  to  allow  UGX  to  complete  a  technical 
transfer of MANUFACTURING of DRUG PRODUCT from BSP to UGX or to such an alternative manufacturer selected by 
UGX  (“TRANSFER  REQUEST”).  BSP  will  cooperate  in  transferring  and  provide  UGX  with  a  full  inventory  of  all  FOC 
MATERIALS  and  PURCHASED  MATERIALS  related  to  the  concerned  DRUG  PRODUCT,  together  with  all  data 
documentation  and  all  other  information  that  BSP  generated  as  part  of  providing  MANUFACTURING  SERVICES  and 
ADDITIONAL SERVICES to UGX and which are necessary in order to complete the TRANSFER REQUEST, excluding 
BSP’s  BACKGROUND  INTELLECTUAL  PROPERTY  and  BSP  INVENTIONS.  BSP  shall  not  be  obligated  to  permit 
personnel  from  any  other  THIRD  PARTY,  whether  or  not  such  THIRD  PARTY  is  a  BSP's  competitor,  to  enter  the 
FACILITY,  nor  shall  any  BSP’s  CONFIDENTIAL  INFORMATION,  BSP’s  BACKGROUND  INTELLECTUAL  PROPERTY 
and BSP INVENTIONS be shared with such THIRD PARTY, without having in place a three-way confidentiality agreement 
accepted by the concerned Parties and, in any event, the prior written  consent of BSP.
e.
Survival.  The  following  Articles  and  Sections  shall  survive  the  termination  or  expiration  of  this  AGREEMENT  for  any 
reason: 11 (Price. Invoice and Payment), 12. 1 and 12.2 (Records), 13 (Intellectual Property), 14 (Indemnification), 
  
  
  
  
  
  
  
  
  
  
15(General Representations and Warranties), 16 (Limitation of Liability), 17 (Insurance), 18 (Confidential Information), 20 
(Term and Termination), 21 (Decomissioning), 22 (Effects of Termination), 23 (Miscellaneous) and 20.5 (Survival). 
5. Decommissioning.
1.
1.
2.
3.
2.
Upon expiration or termination of this AGREEMENT or of a PRODUCT SCHEDULE for any reason, unless otherwise provided 
in  this  Section  21,  each  Party  will  promptly  perform  the  DECOMMISSIONING  actions  set  forth  in  this  Section  21,  taking  into 
account that such actions may be delayed to the extent necessary for such Party to fulfill any outstanding MANUFACTURING 
SERVICES  and/or  ADDITIONAL  SERVICES  or  PURCHASE  ORDERS  as  of  the  date  of  such  expiration  or  termination.  In
accordance with the provisions of this Section 21 and upon the written request of a Party, BSP and UGX will take the following 
actions with respect to the applicable PRODUCT SCHEDULE:
BSP ceases and refrains from MANUFACTURING and supplying DRUG PRODUCT for UGX.
The  receiving  Party  shall  deliver  to  disclosing  Party  all  disclosing  Party`s  CONFIDENTIAL  INFORMATION,  BACKGROUND 
INTELLECTUAL  PROPERTY,  INVENTIONS,  Records  containing  or  comprising  the  disclosing  Party’s  CONFIDENTIAL 
INFORMATION  that  the  receiving  Party  has  maintained  under  this  AGREEMENT.  Notwithstanding  the  foregoing,  (i)  the 
receiving Party may retain and continue to use copies of such data, Records, and documentation as required to comply with all 
APPLICABLE LAWS, and (ii) BSP legal department may retain one copy of the foregoing, in each case, subject to its continuing 
obligation of the confidentiality under Section 16.
BSP shall return to UGX all remaining DRUG PRODUCT, WORK IN PROCESS and FOC MATERIALS in BSP’s possession or 
destroy such FOC MATERIALS, DRUG PRODUCT and WORK IN PROCESS as determined in UGX’s sole discretion and cost 
as set forth in Section 22.3. 
Prior  to  commencing  DECOMMISSIONING  and  during  the  period  of  any  DECOMMISSIONING,  the  JOINT  WORKING  TEAM 
will meet and discuss in good faith and agree upon a plan for such DECOMMISSIONING.
6. Effects of Termination.
1.
1.
2.
3.
Expiration  or  termination  of  this  AGREEMENT  or  a  PRODUCT  SCHEDULE  for  any  reason  shall  not  exempt  any  Party  from 
paying  to  any  other  Party  any  undisputed  amounts  owed  to  such  Party  at  the  time  of  such  expiration  or  termination. 
Notwithstanding the foregoing, neither BSP nor UGX shall have any further obligations under this AGREEMENT or a PRODUCT 
SCHEDULE,  as  applicable,  except  as  set  forth  in  this  Section  22.  In  case  of  termination,  together  with  the  notice  UGX  shall 
notify BSP of its intention or not to have the DRUG PRODUCT MANUFACTURED as identified in the BINDING FORECAST and 
as determined pursuant to Section 8. 
Should  UGX  request  BSP  to  MANUFACTURE  the  DRUG  PRODUCT  forecasted  pursuant  to  Section  8,  then  the 
MANUFACTURING SERVICES and/or ADDITIONAL SERVICES shall be run as usual and BSP shall be compensated for the 
quantities set forth in the BINDING FORECAST in accordance with the terms of this Agreement.
In the event UGX notifies BSP of its intention to terminate this AGREEMENT or any PRODUCT SCHEDULE and not to have 
DRUG  PRODUCT  MANUFACTURED  during  the  [***]  period  after  the  termination  notice,  then  UGX  shall  be  bound  to  pay  to 
BSP [***] of the quantities set forth in the BINDING FORECAST, provided that this payment obligation of UGX shall not apply in 
case  this  AGREEMENT  or  any  PRODUCT  SCHEDULE  is  terminated  by  UGX  pursuant  to  Section  20.2.7  (termination  for 
insolvency) or Section 20.2.2 (a)(uncured material breach). Notwithstanding anything of the foregoing, should BSP be able to 
reallocate  the  unused  reserved  capacity  for  UGX  orders  to  other  clients’  business  opportunities  by  [***]  and  to  the  extent 
consistent with [***], then the amount resulting from the difference between the amount due for the order(s) cancelled by UGX 
and the amount recovered by BSP shall be [***].
Alternatively,  if  applicable,  UGX  may  request  that  BSP  MANUFACTURE  one  or  more  DRUG  PRODUCT(s)  other  than  the 
discontinued  DRUG  PRODUCT  in  order  to  fill,  in  whole  or  in  part,  the  MANUFACTURING  capacity  reserved  for  such 
discontinued  DRUG  PRODUCT  and,  provided  BSP  has  the  capability  to  MANUFACTURE  such  other  DRUG  PRODUCT(s), 
BSP 
  
  
  
  
  
  
  
  
  
shall MANUFACTURE such other DRUG PRODUCT(s). In such a case, the Parties shall discuss in good faith the terms of the 
transfer, the equivalence and compensation with respect to the non-absorbed capacity.
BSP,  upon  receipt  of  a  termination  notice  by  UGX,  will  promptly  cease  performance  of  the  MANUFACTURING  SERVICES  or 
ADDITIONAL  SERVICES  in  progress  under  the  terminated  AGREEMENT  to  the  extent  applicable,  in  accordance  with  a 
schedule agreed upon by the Parties or unless otherwise advised by UGX and specified in the notice of termination.
In addition, UGX shall compensate BSP for:
any existing inventories of the applicable DRUG PRODUCT(s) MANUFACTURED by BSP in accordance with the then-current 
BINDING FORECAST at the MANUFACTURING SERVICE FEE therefor held by BSP as the date of the termination; provided 
that all terms applicable to the MANUFACTURING and supply of DRUG PRODUCT(s) pursuant to this AGREEMENT and such 
PRODUCT SCHEDULE shall apply to such DRUG PRODUCT(s), and
all  PURCHASED  MATERIALS  acquired  by  BSP  or  that  BSP  is  obliged  to  purchase  hereunder  and  necessary  to 
MANUFACTURE  the  applicable  DRUG  PRODUCT(s)  is  in  accordance  with  BSP’s  commitment  related  to  the  then-current 
BINDING  FORECAST,  if  applicable,  at  [***]therefor,  [***]%;  provided  that  BSP  shall  take  all  reasonable  steps  to  mitigate  the 
costs incurred in connection therewith, and in particular, BSP shall use its best efforts to (A) immediately cancel, to the greatest 
extent possible, any THIRD PARTY obligations to purchase such PURCHASED MATERIALS and (B) promptly inform UGX of 
any irrevocable commitments made to purchase such PURCHASED MATERIALS, provided further that the obligations of UGX 
set forth in this paragraph (b) shall not apply in case this AGREEMENT or any PRODUCT SCHEDULE is terminated by UGX 
pursuant to Section 20.2.7 (termination for insolvency) or Section 20.2.2 (a) (uncured material).
UGX  shall  arrange  for  the  pick-up  from  FACILITY  of  all  of  FOC  MATERIALS  and  DRUG  PRODUCT  and  supplies  owned  by 
UGX within [***] days after the earlier of the termination or expiration of this AGREEMENT. BSP shall charge to UGX a [***] (per 
[***])] in accordance with Section 9.5. and as set forth in the relevant PRODUCT SCHEDULE.
4.
2.
1.
2.
3.
4.
UGX shall be responsible for paying any costs related to [***], in accordance with Section 11.7.
7. Miscellaneous.
1.
2.
3.
4.
5.
This  AGREEMENT  constitutes  the  entire  understanding  between  the  Parties  as  of  the  EFFECTIVE  DATE  with  respect  to  the 
subject  matter  hereof  and  supersedes  all  prior  agreements,  negotiations,  understandings,  representations,  statements  and 
writings relating thereto.
No change of this AGREEMENT and any and all of its Appendixes is valid unless it is in writing and signed by the Parties. This 
applies also to the foregoing sentence.
In case one of the clauses is invalid or unenforceable, the other clauses remain unaffected by this. The Parties shall negotiate in 
good faith if they wish to replace such invalid or unenforceable clause.
Any  notice  or  request  required  or  permitted  to  be  given  under  or  in  connection  with  this  AGREEMENT  or  the  subject  matter 
hereof shall be given by prepaid registered or certified first-class airmail, recognized international carrier, e-mail or telefax to the 
recipient at its address set forth on the first page of this AGREEMENT or to such other address as may have therefore been 
furnished  in  writing  by  the  recipient  to  the  sending  Party.  Any  such  aforementioned  notice  or  request  concerning  this 
AGREEMENT shall be effective upon receipt by the Party to which it is addressed.
Neither Party may assign or transfer this AGREEMENT or any rights or obligations hereunder, by operation or law or otherwise, 
without the prior written consent of the other Party, except that a Party may make such an assignment or transfer, by operation 
of law or otherwise, without the other Party’s consent to its AFFILIATE(S) or to an entity that acquires all or substantially all the 
business of such Party to which this AGREEMENT relates, whether in a merger, consolidation, reorganization, acquisition, sale 
or otherwise. Notwithstanding anything to the contrary contained herein, 
  
  
  
  
  
  
  
  
  
  
  
  
in  the  event  of  an  assignment  to  an  AFFILIATE  pursuant  to  this  Section  23.5,  the  assigning  Party  consents,  acknowledges, 
covenants and guarantees that it shall remain jointly and severally liable, along with the assignee, to the non-assigning Party for 
all the obligations contained herein. Notwithstanding the foregoing, should any assignee of UGX be a competitor of BSP or has 
competing business with BSP, BSP shall be [***]. BSP shall not be obligated to permit personnel from such alternative supplier 
or any of its consultants to enter the FACILITIES. UGX shall be the sole contact with BSP and shall remain jointly liable with 
such  acquirer  until  the  expiration  of  the  shelf  life  of  the  last  batch  manufactured  at  the  Facility.  This  AGREEMENT  shall  be 
binding  on  the  successors  and  permitted  assigns  of  the  assigning  Party,  and  the  name  of  a  Party  appearing  herein  shall  be 
deemed to include the name(s) of such Party’s successors and permitted assigns to the extent necessary to carry out the intent 
of this AGREEMENT. Any assignment or attempted assignment by either Party in violation of this Section 23.5, shall be null and 
void and of no legal effect. 
6.
7.
8.
Subject to the prior written consent of UGX, BSP may subcontract any part of its performance hereunder. Notwithstanding the 
foregoing, BSP shall remain responsible and primarily liable for the performance of all BSP’s obligations under this Agreement 
and any breach thereof by any subcontractor within the limitation of liability set forth in Section 16.
This  AGREEMENT  and  any  potential  subsequent  amendment  to  it,  if  any,  and  the  Product  Schedules,  maybe  executed  in  2 
(two)  or  more  counterparts,  each  of  which  shall  be  deemed  an  original  and  all  of  which  shall  constitute  together  the  same 
instrument. In the event that any signature is delivered by facsimile transmission or by e-mail delivery of a .pdf format data file, 
such signature shall create a valid and binding obligation of the Party executing (or on whose behalf such signature is executed) 
with the same force and effect as if such facsimile or “.pdf” signature page were an original thereof.
Any controversy, claim or dispute arising out of or relating to this AGREEMENT or the breach thereof shall be settled, if possible, 
through  good-faith  negotiation  between  the  Parties.  Such  good  faith  negotiations  shall  commence  promptly  upon  a  Party’s 
receipt of notice of any claim or dispute from the other Party and continue for a period [***] CALENDARDAYS. If such efforts are 
not successful, such controversy, claim or dispute relating to, arising out of, or in any way connected with this AGREEMENT or 
any  term  or  condition  hereof,  or  the  performance  by  either  Party  of  its  obligations  hereunder,  except  as  otherwise  expressly 
provided  in  this  AGREEMENT,  shall  be  finally  resolved  by  binding  arbitration.  Whenever  a  Party  shall  decide  to  institute 
arbitration proceedings, it shall give written notice to that effect to the other Party. This AGREEMENT shall be governed by and 
construed in accordance with the Laws of the State of New York without reference to any rules of conflicts of law in force on the 
date  when  the  notice  of  arbitration  is  submitted  by  either  Party  and  the  United  Nations  Convention  on  Agreements  for  the 
International Sale of Goods is hereby excluded. Disputes shall be resolved through arbitration by an arbitration panel of three (3) 
arbitrators appointed in accordance with the Rules of the International Chamber of Commerce (the “RULES”). Such arbitration 
shall take place in New York City, New York, USA and be regulated by the RULES. The arbitral proceedings shall be conducted 
in English and any award rendered in such arbitral proceedings shall be final and binding upon both Parties. Either Party may 
enter  any  arbitration  award  in  any  court  having  jurisdiction  or  may  make  an  application  to  any  such  court  for  a  judicial 
acceptance  of  the  award  and  order  of  enforcement,  as  the  case  may  be.  The  Parties’  agreement  to  submit  to  an  arbitration
referred to herein shall in no way prevent either Party from exercising its right to terminate this AGREEMENT consistent with the 
terms set forth in Sections 8 and 20. Either Party may, without inconsistency with this Section, seek from the competent court 
any provisional remedy that may be necessary to protect their rights or property pending good faith negotiations between the 
Parties as above described or the establishment of the arbitration.
9.
Each Party hereto has a duty of good faith and fair dealing in connection with its performance under this AGREEMENT. Each 
Party shall perform its obligations under this AGREEMENT in a diligent, legal, ethical and professional manner so as to advance 
the purposes and intent of this AGREEMENT.
IN  WITNESS  WHEREOF,  this  Agreement  is  executed  as  of  the  Effective  Date  on  behalf  of  the  parties  by  their  duly  authorized 
representatives.
ULTRAGENYX PHARMACEUTICAL INC.
BSP Pharmaceuticals S.p.A.
Dennis Huang
Chief Technical Operations Officer
 Aldo Braca
President and CEO
  
  
  
  
 
  
  
  
  
  
10-Mar-2021
10-Mar-2021
  
THIRD AMENDMENT TO LEASE AGREEMENT
THIS THIRD AMENDMENT TO LEASE AGREEMENT (this “Third Amendment”) is made as of July 27  , 2022, by and between 
ARE-SAN FRANCISCO NO. 17, LLC, a Delaware limited liability company (“Landlord”), and ULTRAGENYX 
PHARMACEUTICAL INC., a Delaware corporation (“Tenant”).
RECITALS
Exhibit 10.92
A.
Landlord  and  Tenant  are  now  parties  to  that  certain  Lease  Agreement  dated  as  of  December  15,  2019,  as 
amended by that certain First Amendment to Lease Agreement dated as of September 30, 2020, and as further amended by that 
certain  Second  Amendment  to  Lease  Agreement  as  of  October  21,  2020  (as  amended,  the  “Lease”).  Pursuant  to  the  Lease,
Tenant leases certain “Premises” consisting of approximately 32,377 rentable square feet of space consisting of (i) approximately 
10,781 rentable square feet on the second floor of the Building (the “Original Premises”),
(ii)  approximately  15,116  rentable  square  feet  on  the  ground  floor  of  the  Building  (the  “First  Expansion  Premises”),  and  (iii) 
approximately 6,480 rentable square feet on the ground floor of the Building (the “Second Expansion Premises”) in that certain 
building located at 7000 Shoreline Court, South San Francisco, California (the “Building”). The Premises are more particularly 
described in the Lease. Capitalized terms used herein without definition shall have the meanings defined for such terms in the 
Lease.
B.
Pursuant  to  the  Work  Letter  and  the  First  Expansion  Premises  Work  Letter,  Landlord  agreed  to  provide  TI 
Allowances to Tenant in the amount of (i) $107,810.00 with respect to the Original Premises, (ii) $513,944.00 with respect to the 
First  Expansion  Premises,  and  (iii)  $220,320.00  with  respect  to  the  Second  Expansion  Premises.  Tenant  has  not  used  the  full 
amount of such TI Allowances.
C.
Landlord  and  Tenant  desire,  subject  to  the  terms  and  conditions  set  forth  below,  to  amend  the  Lease  as 
provided in this Third Amendment.
NOW, THEREFORE,  in  consideration  of  the  foregoing  Recitals,  which  are  incorporated  herein  by  this  reference,  the 
mutual promises and conditions contained herein, and for other good and valuable consideration, the receipt and sufficiency of 
which are hereby acknowledged, Landlord and Tenant hereby agree as follows:
Availability of Remaining TI Allowances. Notwithstanding anything to the contrary contained in the Lease, the Work 
Letter or the First Expansion Premises Work Letter, Landlord and Tenant agree that (a) any portion of the TI Allowance 
made  available  under  the  Work  Letter  remaining  undisbursed  as  of  the  date  of  this  Third  Amendment  shall  remain 
available, subject to the terms of the Work Letter, through August 31, 2022, and (b) any portion of the TI Allowance made 
available under the First Expansion Premises Work Letter remaining undisbursed as of the date of this Third Amendment 
shall remain available, subject to the terms of the First Expansion Premises Work Letter, through August 31, 2022.
California  Accessibility  Disclosure.  The  provisions  of  Section  42(p)  of  the  Lease  are  hereby  incorporated  by 
reference.
OFAC. Tenant and any beneficial owners of Tenant are currently (a) in compliance with and shall at all times during the 
Term of the Lease remain in compliance with the regulations of the Office of Foreign Assets Control (“OFAC”) of the U.S. 
Department of Treasury and any statute, executive order, or regulation relating thereto (collectively, the “OFAC Rules”), 
(b) not listed on, and shall not during the Term of the Lease be listed on, the Specially Designated Nationals and Blocked 
Persons List maintained by OFAC and/or on any other similar list maintained by OFAC or other governmental authority 
pursuant to any authorizing statute, executive order, or
1.
2.
3.
1
 
 
 
 
 
 
 
 
 
 
 
 
regulation, and (c) not a person or entity with whom a U.S. person is prohibited from conducting business under the OFAC 
Rules.
4.
Miscellaneous.
This  Third  Amendment  is  the  entire  agreement  between  the  parties  with  respect  to  the  subject  matter  hereof
a.
and  supersedes  all  prior  and  contemporaneous  oral  and  written  agreements  and  discussions.  This  Third  Amendment 
may be amended only by an agreement in writing, signed by the parties hereto.
b.
successors and assigns.
This  Third  Amendment  is  binding  upon  and  shall  inure  to  the  benefit  of  the  parties  hereto,  their  respective 
c.
This Third Amendment may be executed in 2 or more counterparts, each of which shall be deemed an original, 
but  all  of  which  together  shall  constitute  one  and  the  same  instrument.  Counterparts  may  be  delivered  via  facsimile, 
electronic mail (including pdf or any electronic signature process complying with the U.S. federal ESIGN Act of 2000) or 
other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered 
and be valid and effective for all purposes. Electronic signatures shall be deemed original signatures for purposes of this 
Third  Amendment  and  all  matters  related  thereto,  with  such  electronic  signatures  having  the  same  legal  effect  as 
original signatures.
Except as amended and/or modified by this Third Amendment, the Lease is hereby ratified and confirmed and 
d.
all other terms of the Lease shall remain in full force and effect, unaltered and unchanged by this Third Amendment. In 
the event of any conflict between the provisions of this Third Amendment and the provisions of the Lease, the provisions 
of this Third Amendment shall prevail. Whether or not specifically amended by this Third Amendment, all of the terms 
and provisions of the Lease are hereby amended to the extent necessary to give effect to the purpose and intent of this 
Third Amendment.
[Signatures on the next page]
2
 
 
 
 
 
 
 
 
 
IN WITNESS WHEREOF, the parties hereto have executed this Third Amendment as of the day and year first above 
written.
LANDLORD:
ARE-SAN FRANCISCO NO. 17, LLC,
a Delaware limited liability company
By:  ALEXANDRIA REAL ESTATE EQUITIES, L.P.,
a Delaware limited partnership, managing 
member
By:  ARE-QRS CORP.,
a Maryland corporation, its General 
Partner
By: /s/ William Barrett
Name: William Barrett 
Its: Vice President - Real Estate Legal Affairs
TENANT:
ULTRAGENYX PHARMACEUTICAL INC.,
a Delaware corporation
By: /s/  Emil  D.  Kakkis,  M.D.,  Ph.D. 
D. Kakkis, M.D., Ph.D. Its: CEO 
    Name:  Emil 
□X I hereby certify that the signature, name,
and title above are my signature, name and title
3
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.95
LEASE
BY AND BETWEEN
BRICKBOTTOM I QOZB LP 
LANDLORD
AND
ULTRAGENYX PHARMACEUTICAL INC. TENANT
100 Chestnut Street 
Somerville, Massachusetts
NOTE: See Subsection 6.1.9 for provision regarding Tenant’s request for Landlord’s consent to 
Alterations and removal of the Alterations.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TABLE OF CONTENTS
Page
Article 1  Reference Data 
1
1.1
1.2
Introduction and Subjects Referred To  1
Exhibits  5
Article 2  Premises and Term 6
2.1
2.2
2.3
2.4
2.5
Premises 6
6
Term 
Expansion Option  7
Extension Option  7
Measurement of the Premises 
10
Article 3  Commencement and Condition 
11
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
12
Commencement Date  11
Landlord’s Work 
Tenant’s Work 13
Substantial Completion  19
Plans; Books and Records 
Costs of the Plans and Tenant’s Work  20
Tenant Delay; Force Majeure  21
Early Access  22
Construction Representatives 22
19
Article 4  Rent, Additional Rent, Insurance and Other Charges  22
4.1
4.2
4.3
4.4
4.5
4.6
4.7
30
The Annual Fixed Rent  22
23
Additional Rent 
4.2.1
Real Estate Taxes  24
4.2.2
25
Operating Costs 
Personal Property and Sales Taxes 
Insurance 
4.4.1
4.4.2
4.4.3
4.4.4 Waiver of Subrogation  33
Utilities  33
Late Payment of Rent 
34
Security Deposit 
Insurance Policies  30
Requirements  32
Vendors Insurance  33
34
30
Article 5  Landlord’s Covenants 
36
5.1
5.2
Affirmative Covenants  36
5.1.1
5.1.2
5.1.3
5.1.4
Interruption 
Heat and Air-Conditioning 
Cleaning; Water 
Elevator, Lighting and Electricity  38
Repairs  39
39
36
37
 
 
 
 
 
 
 
 
5.3
Outside Services  40
 
 
 
 
 
TABLE OF CONTENTS 
(CONTINUED)
Page
5.4
5.5
5.6
5.7
Access to Building  40
Parking  41
Landlord’s Hazardous Waste Representation 42
Indemnification 
43
Article 6  Tenant’s Additional Covenants 
43
6.1
6.2
Landlord’s Expenses For Consents 
47
43
Perform Obligations 
Use  43
Repair and Maintenance 44
Compliance with Law 
44
45
Indemnification 
Landlord’s Right to Enter 
Personal Property at Tenant’s Risk 45
Yield Up  45
Rules and Regulations  46
45
Affirmative Covenants  43
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
6.1.8
6.1.9
6.1.10 Estoppel Certificate 46
6.1.11
6.1.12 Financial Information 
Negative Covenants 
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
6.2.9
6.2.10 Exit Survey 
6.2.11 Odors and Exhaust 56
47
56
51
47
Assignment and Subletting 
Nuisance 51
Floor Load; Heavy Equipment 
Electricity 51
Installation, Alterations or Additions 
Abandonment  53
Signs 
Oil and Hazardous Materials  54
Hazardous Materials Documents  55
53
47
52
Article 7  Casualty or Taking  57
7.1
7.2
7.3
Termination 
Restoration 
59
Award 
57
58
Article 8  Defaults  59
8.1
8.2
60
Default of Tenant  59
Remedies 
8.2.1
Remedies Cumulative  62
Landlord’s Right to Cure Defaults  62
Holding Over  62
Landlord’s Mitigation 
62
8.3
8.4
8.5
 
 
 
 
 
TABLE OF CONTENTS 
(CONTINUED)
Page
8.6
8.7
8.8
Effect of Waivers of Default  63
No Waiver, etc 63
No Accord and Satisfaction  63
Article 9  Rights of Holders  63
9.1
9.2
9.3
Rights of Mortgagees or Ground Lessor 63
Modifications  64
Non-Disturbance  64
Article 10 Miscellaneous Provisions 
64
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
10.12
Notices  64
Quiet Enjoyment; Landlord’s Right to Make Alterations, Etc  65
Lease not to be Recorded; Confidentiality of Lease Terms  66
Assignment of Rents and Transfer of Title; Limitation of Landlord’s Liability  66
Landlord’s Default  67
Notice to Mortgagee and Ground Lessor 
Brokerage 
Waiver of Jury Trial 68
Applicable Law and Construction  68
Evidence of Authority 
Roof Equipment 
69
Prevailing Parties  71
68
69
68
 
 
 
 
 
LEASE
100 Chestnut Street 
Somerville, Massachusetts
Article 1 
Reference 
Data
1.1
Introduction and Subjects Referred To.
This is a lease (this “Lease”) entered into by and between BRICKBOTTOM I QOZB LP, a Delaware 
limited partnership transacting business in Massachusetts as BRICKBOTTOM I QOZB LIMITED PARTNERSHIP 
(“Landlord”) and ULTRAGENYX PHARMACEUTICAL
INC., a Delaware corporation (“Tenant”).
Each reference in this Lease to any of the following terms or phrases shall be construed to incorporate 
the corresponding definition stated in this Section 1.1.
Date of
this Lease: 
August 18, 2022.
Building and
Property:  That four-story office and laboratory building to be constructed by Landlord (the “Building”) 
on the parcel of land in the City of Somerville, Massachusetts known as 
and located at 100 Chestnut Street (the “Land”) as shown on Exhibit A-1 
attached hereto. The Building and the land parcels on which it is located 
and the sidewalks adjacent thereto are hereinafter collectively referred to 
as the “Property “Property”.
Premises: 
A portion of the second (2nd) floor of the Building, substantially as shown on Exhibit A-1 
hereto.
Premises
Rentable Area: 
42,580 rentable square feet as shown on Exhibit A-2 attached hereto, subject to 
Section 2.3 below, which may be configured to achieve a 65-35 lab to 
office ratio on the first 36,437 rentable square feet of Premises Rentable 
Area and a 60-40 lab to office ratio on the remaining square feet of 
Premises Rentable Area.
Building
Rentable Area: 
208,616 square feet.
Original Term:  Six (6) years and four (4) months, beginning on the
Commencement Date and expiring on the day preceding the sixth
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rent Commencement
(cid:0)
 
 
 
 
 
 
 
 
 
(6th) anniversary of the Rent Commencement Date, except that if the Rent Commencement Date shall occur on a day other 
than the first day of a month, the Original Term shall expire on the last day of the month in which such anniversary shall occur.
 
 
 
 
 
Date: 
The date that is four (4) months after the Commencement Date.
Lease Year:  Each consecutive twelve (12) calendar month period immediately following the 
preceding Lease Year, beginning on the Commencement Date, except 
that Lease Year 1 shall also include the period from the Commencement 
Date through the day before the Rent Commencement Date and the 
succeeding twelve (12) month period beginning on the Rent 
Commencement Date, and, if the Rent Commencement Date does not 
occur on the first day of a calendar month, Lease Year 1 shall also include 
the partial calendar month during which the first anniversary of the Rent 
Commencement Date occurs; with each succeeding Lease Year being the 
period of twelve (12) consecutive calendar months following the 
preceding Lease Year
Annual
Fixed Rent: 
The following amounts, subject to adjustment as set forth in Section 3.6:
Months
Annual 
Fixed Rent
PRSF per 
annum
Annual Fixed 
Rent
Monthly 
Installments
1-4
(Lease Year 1)
5-16
(Lease Year 1)
17-28
(Lease Year 2)
29-40
(Lease Year 3)
41-52
(Lease Year 4)
53-64
(Lease Year 5)
65-76
(Lease Year 6)
$0.00
$0
$0
$123.92
$5,276,513.60
$439,709.47
$126.47
$5,385,092.60
$448,757.72
$129.10
$5,496,928.97
$458,077.41
$131.80
$5,612,120.43
$467,676.70
$134.59
$5,730,767.64
$477,563.97
$137.46
$5,852,974.26
$487,747.85
* Tenant shall not be obligated to pay Annual Fixed Rent for the four (4) 
month period beginning on the Commencement Date and ending on the 
day before the Rent Commencement Date. If the
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rent Commencement Date is other than the first day of a calendar month, 
Tenant shall pay Annual Fixed Rent for the month in which the first 
anniversary of the Rent Commencement Date occurs in an amount which 
is equal to $439,709.47 multiplied by a fraction, the numerator of which is 
the number of days from the first anniversary of the Rent Commencement 
Date through the last day of the month in which the first anniversary of the 
Rent Commencement Date occurs (inclusive of both dates) and the 
denominator of which is the number of days in such full calendar month.
Annual Fixed Rent as set forth in the schedule above is comprised of the 
Base Rent and the Financed-Fit-Out Rent, as follows:
“Base Rent” shall mean
Months
1-4
(Lease Year 1)
5-16
(Lease Year 1)
17-28
(Lease Year 2)
29-40
(Lease Year 3)
41-52
(Lease Year 4)
53-64
(Lease Year 5)
65-76
(Lease Year 6)
Base 
Rent
PRSF
per
Annum
$0
Annual Base 
Rent
Monthly Base 
Rent
$0
$0
$85.00
$3,619,300.00
$301,608.33
$87.55
$3,727,879.00
$310,656.58
$90.18
$3,839,715.37
$319,976.28
$92.88
$3,954,906.83
$329,575.57
$95.67
$4,073,554.04
$339,462.84
$98.54
$4,195,760.66
$349,646.72
“Financed Fit-Out Rent” shall mean**:
Months
1-4
(Lease Year 1)
Financed 
Fit-Out 
Rent
PRSF
per
Annum  
$0
Annual Financed 
Fit-Out Rent
Monthly Financed 
Fit-Out Rent
$0
$0
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5-16
(Lease Year 1)
17-28
(Lease Year 2)
29-40
(Lease Year 3)
41-52
(Lease Year 4)
53-64
(Lease Year 5)
65-76
(Lease Year 6)
$38.92
$1,657,213.60
$138,101.13
$38.92
$1,657,213.60
$138,101.13
$38.92
$1,657,213.60
$138,101.13
$38.92
$1,657,213.60
$138,101.13
$38.92
$1,657,213.60
$138,101.13
$38.92
$1,657,213.60
$138,101.13
** Subject to prepayment as provided in Section 4.1.
Tenant’s Percentage: The fraction, expressed as a percentage, the numerator of which is the Rentable 
Floor Area of Premises and the denominator of which is the Rentable Floor 
Area of Building, which is twenty and forty- one hundredths percent 
(20.41%), subject to adjustment as provided in Section 2.6.
Permitted Uses:  General administrative and sales office purposes, life science discovery and 
development, preclinical research, clinical research, QC testing, pilot plant 
operations, and other manufacturing support functions, engineering, 
laboratory, partnership/special purpose vehicle/university/hospital 
collaboration, sales and marketing, employee training, storage and/or 
warehouse and other lawful ancillary uses that are (i) consistent with first 
class life science/R&D/office facilities in the Greater Boston Area, (ii) in 
compliance with all applicable laws, and (iii) not conducted by a 
government, local state or federal agency, in all events subject to the 
provisions of Subsection 6.1.2.
Delivery Date:  September 1, 2023.
Security Deposit:  Equal to six (6) months of the Annual Base Rent due per month for Months 5-16 in 
the schedule above (initially, $1,809,650.00) subject to adjustment as set 
forth in Section 3.6 and to reduction as set forth in Section 4.7.
Commercial 
General Liability 
Insurance
Limits: 
$5,000,000 per occurrence.
Original Address of
Landlord: BRICKBOTTOM I QOZB LP
NRL Manager
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
c/o North River 
Company 610 West 26th 
Street
New York, NY 10001 
Attn: Christopher S. 
Flagg
Landlord's Agent:  NRL Manager or such other entity as shall be designated by Landlord 
from time to time.
Original Address of
Tenant:  Ultragenyx Pharmaceutical Inc.
Legal 
Department 
60 Leveroni 
Court
Novato, CA 94949
Account for Payment
of Rent:  Bank Name: First Republic Routing No.: 
321081669
Account Name: BRICKBOTTOM I QOZB LP (DACA)
Account No.: 80010662806
1.2
Exhibits.
The Exhibits listed below in this section are incorporated in this Lease by reference and are to be 
construed as a part of this Lease.
EXHIBIT A-1.  Plan of Land with Building Footprint EXHIBIT 
A-2.  Plan showing the Premises.
EXHIBIT A-3.  Landlord’s Work. 
EXHIBIT A-4.  Work Matrix.
EXHIBIT A-5.  Laboratory and Office Basis of Design. EXHIBIT 
A-6.  Preliminary Pricing.
EXHIBIT A-7.  Preliminary Long Lead Items. 
EXHIBIT B.  Rules and Regulations.
EXHIBIT C.  Alterations Requirements.
EXHIBIT D.  Contractor’s Insurance Requirements. 
EXHIBIT E. 
EXHIBIT F. 
Tenant Design and Construction Guidelines. EXHIBIT H.  Mobility 
Management Plan.
EXHIBIT I. 
Form of Shared Space Arrangement. EXHIBIT 
J.  Form of Non-Disturbance Agreement. EXHIBIT K. Form 
of Letter of Credit.
EXHIBIT L.  Waste Storage Location.
EXHIBIT M.  Financed Fit-Out Rent Amortization Schedule.
Intentionally Omitted.
Declaration By Landlord and Tenant. EXHIBIT G. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Article 2 
Premises and 
Term
2.1
Premises. Landlord hereby leases the Premises to Tenant and Tenant hereby
leases the Premises from Landlord, subject to and with the benefit of the terms, covenants, conditions and 
provisions of this Lease, excluding exterior faces of exterior walls, the common lobbies, hallways, stairways, 
stairwells, elevator shafts and other common areas, and the escalators, elevators, pipes, ducts, conduits, wires 
and appurtenant fixtures and other common facilities serving the common areas, the Premises and the premises 
of other tenants in the Building.
Tenant shall have, as appurtenant to the Premises, rights to use, in common with others, subject to the 
Rules and Regulations (as defined in Subsection 6.1.9) : (a) the common lobbies, hallways and stairways of the 
Building, (b) the common elevators, loading docks, pipes, ducts, conduits, wires and appurtenant fixtures and 
other common facilities serving the Premises, (c) common walkways and driveways (if any) necessary for access 
to the Building, (d) if the Premises include less than all of the rentable area of any floor of the Building, the 
common toilets and other common facilities located on such floor, and (e) the Laboratory Systems. “Laboratory 
Systems” shall mean all base Building systems, fixtures and equipment provided by Landlord from time to time 
for the use in common by tenants and occupants of the Building which support laboratory uses in the Building. 
As of the Commencement Date, the Laboratory Systems shall include the following: pH neutralization systems, 
chemical storage room and a waste accumulation room. Landlord shall not (i) reduce the number of parking 
spaces available for use of tenants of the Building except to the extent required by law or the MMP, as defined in 
Subsection 6.1.2, (ii) alter the common areas and the common facilities in such a manner as would materially 
adversely affect Tenant’s access to the Premises, (iii) alter the common facilities and common areas, including 
but not limited to the Laboratory Systems, which would cause Tenant to incur expenses (other than de minimis 
amounts) or which would, to more than a de minimis extent, adversely alter, reduce or remove any component of 
the common facilities including, but not limited to, the Laboratory Systems, which exist as of the Commencement 
Date or which is thereafter included within the Laboratory Systems, or (iv) enter into a declaration of covenants 
or reciprocal easement agreement or otherwise restrict or bind the Property or Building which would cause 
Tenant to incur additional expenses or which would reduce
Tenant’s rights or increase Tenant’s obligations under this Lease other to a de minimis degree.
2.2
Term. The term of this Lease shall be for a period beginning on the Commencement Date (as 
defined in Section 3.1) and continuing for the Original Term and any extension of the term hereof in accordance 
with the provision of this Lease, unless sooner terminated as hereinafter provided. When the dates of the 
beginning and end of the Original Term have been determined such dates shall be evidenced by a confirmatory 
document executed by Landlord and Tenant in the form substantially as shown on Exhibit F hereto and delivered 
each to the other, but the failure of Landlord and Tenant to execute or deliver such document shall have no effect 
upon such dates. The Original Term and any extension of the term hereof in accordance with the provisions of 
this Lease is hereinafter referred to as the “term” of this Lease.
 
 
 
 
 
 
 
 
 
 
 
2.3
Expansion Option. Tenant shall have the ongoing option, continuing until the date which is nine 
(9) months prior to the estimated Rent Commencement Date (i.e., March 31, 2023) (the “Expansion Option End 
Date”), to elect to lease all or any portion of the remaining 18,353 rentable square feet of space located on the 
second (2nd) floor of the Building (the “Expansion Area”) on the same terms and conditions as the initial Premises 
by delivering not more than two (2) notices to Landlord (each, an “Expansion Option Notice”) at any time 
following the Date of this Lease, but not later than the Expansion Option End Date, time being of the essence. If 
Tenant elects to lease less than all of the Expansion Area in its first Expansion Option Notice, Tenant shall have 
the ongoing right to elect all or any portion of remaining Expansion Area until the Expansion Option End Date; 
provided, however, that if Tenant shall elect to lease less than all of the Expansion Area it may not elect to lease 
more than 12,353 rentable square feet of the Expansion Area (such that there shall remain at least 6,000 
rentable square feet of space on the second (2nd) floor of the Building if Tenant elects to lease less than all of the 
Expansion Area). If Tenant elects to lease all of the Expansion Area, the Premises Rentable Area (i.e. the 
aggregate square footage of the Premises and the Expansion Area) shall be 60,933 rentable square feet. Tenant 
shall specify in its Expansion Option Notice the square footage and approximate location of the portion of the 
Expansion Area which Tenant has elected to lease. If an Expansion Option Notice is for less than all of the 
Expansion Area, Landlord and Tenant shall work together in good faith to mutually agree upon a reasonable 
configuration and layout of the premises Tenant has elected to lease, plus or minus such additional space as may 
be reasonably required so that such space and any remaining space on the second (2nd) floor of the Building 
(which in no event shall be less than 6,000 rentable square feet) are both situated and configured so as to be 
reasonably marketable and so that the space Tenant has elected to lease is contiguous with the Premises, as 
may be expanded, and a construction and delivery schedule for such Expansion Area. In no event shall 
Landlord’s obligation for any penalties related to the Existing Lease, as defined in Section 3.1 below, apply to the 
delivery of any of the Expansion Space. The parties shall execute an amendment to this Lease within thirty (30) 
days following an Expansion Option Notice, in a commercially reasonable form prepared by Landlord and 
reasonably acceptable to Tenant, memorializing the expansion of the Premises, amending the terms of this 
Lease which vary with the Premises Rentable Area (including but not limited to, the Annual Fixed Rent, Tenant’s 
Percentage, the Allowance, and the number of Parking Spaces allocated to Tenant), confirming that the lease of 
such Expansion Area shall be on the same terms and conditions as this Lease, and confirming that all terms, 
covenants, conditions, and provisions of the Lease remain unmodified with the exception of those items which 
would be affected by the expansion, as the case may be. The Parties hereby agree that the Annual Fixed Rent 
for the Expansion Area shall include the Financed Fit-Out Rent only to the extent that Landlord provides the 
same financing for tenant improvements in the Expansion Area which is the basis of the Financed Fit-Out Rent. 
Landlord shall not lease any of the Expansion Area to a third party unless Tenant fails to exercise its rights prior 
to the Expansion Option End Date to lease such Expansion Area. If Landlord enters into a letter of intent to lease, 
a license or other occupancy agreement for all or any portion of the Expansion Area prior to the Expansion 
Option End Date, Landlord shall explicitly provide that such letter of intent, license or occupancy agreement is 
subject to and subordinate to Tenant’s rights hereunder to lease the Expansion Area.
2.4
Extension Option. So long as this Lease is still in full force and effect, and subject to the 
Conditions (as hereinafter defined), which Landlord may waive, in its discretion, at
 
 
 
 
 
 
 
 
 
 
any time, but only by notice to Tenant, Tenant shall have the right to extend the term of this Lease for two (2) 
additional periods (the “Extended Term(s)”) of five (5) years each, commencing on the day succeeding the 
expiration of the Original Term or the preceding Extended Term, as the case may be, and ending on the day 
immediately preceding the fifth (5th) anniversary of the commencement of such Extended Term. All of the terms, 
covenants and provisions of this Lease applicable immediately prior to the expiration of the then current term (i.e. 
Original Term or Extended Term, as applicable) shall apply to each Extended Term except that (i) the Annual 
Fixed Rent for each Extended Term shall be the Market Rate (as hereinafter defined) for the Premises 
determined as of the date of the Election Notice, as designated by
Landlord by notice to Tenant (“Landlord’s Notice”), but subject to Tenant’s right to dispute as hereinafter provided; 
and (ii) Tenant shall have no further right to extend the term of this Lease beyond the Extended Terms 
hereinabove provided. If Tenant shall elect to exercise any of the aforesaid options, it shall do so by giving 
Landlord notice (an “Election Notice”) of its election not later than twenty-four (24) months, nor sooner than 
twelve (12) months, prior to the expiration of the then current term of this Lease (Original Term or Extended 
Term, as applicable). If Tenant fails to give any such Election Notice to Landlord or the Conditions are neither 
satisfied nor waived by Landlord, the term of this Lease shall automatically terminate no later than the end of the 
term then in effect, and Tenant shall have no further option to extend the term of this Lease, it being agreed that 
time is of the essence with respect to the giving of any such Election Notice. If Tenant shall extend the term 
hereof pursuant to the provisions of this Section 2.4, such extension shall (subject to satisfaction of the 
Conditions, unless waived by Landlord) be automatically effected without the execution of any additional 
documents, but
Tenant shall, at Landlord’s request, execute an agreement confirming the Annual Fixed Rent for the applicable 
Extended Term. The “Conditions” are that, as of the date of the applicable Election Notice there shall exist no 
Default of Tenant and Tenant, its assignees and/or subtenants shall actually occupy, in the aggregate, at least 
eighty percent (80%) of the entire Premises.
“Market Rate” shall mean the then fair market annual rent (determined as set forth below), at the time of 
the Election Notice, for premises in the greater Somerville market (the “Market”) comparable to the Premises in 
terms of location within a building, finish, age, building quality and amenities, under terms and conditions 
substantially the same as those of this Lease, in “as-is” condition taking into account the condition of the 
Premises and the improvements and finishes therein, for those portions of the Premises which are built-out for 
research and development laboratory uses, to the extent such improvements and finishes would be generally 
provided in premises devoted to research and development laboratory uses (but not taking into consideration any 
improvements and finishes in the Premises that are customized or were installed specifically for the use of 
Ultragenyx Pharmaceuticals Inc.) for comparable periods of time, and taking into account all relevant factors such 
as free rent periods, tenant improvement allowances then being offered in the Market and the effect of same on 
base rent (by means of example only, if the Market Rate for a five (5) year renewal term is determined to be
$100.00 per rentable square foot per annum, but it is determined that such Market Rate contemplates a tenant 
improvement allowance in the amount of $25.00 per rentable square foot and Tenant elects not to receive a 
tenant improvement allowance in connection with the Extended Term, the Market Rate shall be reduced by 
$6.08 per rentable square foot per annum assuming an eight percent (8%) amortization of the tenant 
improvement allowance Tenant elects not to receive), the manner, if any, in which Landlord is reimbursed for 
taxes and operating expenses, and brokerage commissions; but which Market Rate shall be determined without
 
 
 
 
 
 
 
 
 
 
regard to the Annual Fixed Rent in effect immediately prior to the commencement of the Extended Term, the 
parties acknowledging that the Annual Fixed Rent for the Original Term was determined based, in part, on the 
cost of improvements to the Premises. At any time during the last two (2) years of any applicable term, within 
thirty (30) days following a request of Tenant,
Landlord shall provide Tenant with Landlord’s designation of the Annual Fixed Rent for the coming potential 
Extended Term. If Tenant disagrees with Landlord’s designation of the Market Rate, then Tenant shall give notice 
thereof to Landlord within twenty (20) days after Landlord’s Notice (failure to provide such notice of disagreement 
within such 20-day period constituting acceptance by Tenant of Market Rate as set forth in Landlord’s Notice); 
and if the parties cannot agree upon the Market Rate by the date that is thirty (30) days following Landlord’s 
Notice, then the Market Rate shall be submitted to appraisal as follows: Within fifteen (15) days after the 
expiration of such thirty (30) day period, Landlord and Tenant shall each give notice to the other specifying the 
name and address of the appraiser each has chosen. The two appraisers so chosen shall meet within ten (10) 
days after the second appraiser is appointed and if, within twenty (20) days after the second appraiser is 
appointed, the two appraisers shall not agree upon a determination of the Market Rate in accordance with the 
following provisions of this Section 2.4 they shall together appoint a third appraiser. If only one appraiser shall be 
chosen whose name and address shall have been given to the other party within such fifteen (15) day period and 
who shall have the qualifications hereinafter set forth, that sole appraiser shall render the decision which would 
otherwise have been made as hereinabove provided. All appraisers referenced in this Section 2.4 shall be 
informed that they must act in a commercially reasonable manner and in good faith.
If said two appraisers cannot agree upon the appointment of a third appraiser within ten
(10) days after the expiration of such twenty (20) day period, then either party, on behalf of both and on notice to 
the other, may request such appointment by the then President of the Greater Boston Real Estate Board (or any 
similar or successor organization) for the greater Somerville, Massachusetts area in accordance with its then 
prevailing rules. If said President shall fail to appoint said third appraiser within ten (10) days after such request 
is made, then either party, on behalf of both and on notice to the other, may request such appointment by the 
American Arbitration Association (or any successor organization) in accordance with its then prevailing rules. In 
the event that all three appraisers cannot agree upon such Market Rate within ten (10) days after the third 
appraiser shall have been selected, then each appraiser shall submit his or her designation of such Market Rate 
to the other two appraisers in writing; and Market Rate shall be determined by calculating the average of the two 
numerically closest (or, if the values are equidistant, all three) values so determined.
Each of the appraisers selected as herein provided shall have at least ten (10) years’ experience as a 
commercial real estate broker in the greater Somerville area dealing with properties of the same type and quality 
as the Building. Each party shall pay the fees and expenses of the appraiser it has selected and the fees of its 
own counsel. Each party shall pay one half (1/2) of the fees and expenses of the third appraiser (or the sole 
appraiser, if applicable) and all other expenses of the appraisal. The decision and award of the appraiser(s) shall 
be in writing and shall be final and conclusive on all parties, and counterpart copies thereof shall be delivered to 
both Landlord and Tenant. Judgment upon the award of the appraiser(s) may be entered in any court of 
competent jurisdiction.
 
 
 
 
 
 
 
 
 
 
 
The appraiser(s) shall determine the Market Rate of the Premises for the applicable Extended Term 
and render a decision and award as to their determination to both Landlord and Tenant (a) within twenty (20) 
days after the appointment of the second appraiser, (b) within twenty (20) days after the appointment of the third 
appraiser or (c) within fifteen (15) days after the appointment of the sole appraiser, as the case may be. In 
rendering such decision and award, the appraiser(s) shall assume (i) that neither Landlord nor the prospective 
tenant is under a compulsion to rent, and that Landlord and Tenant are typically motivated, well-informed and 
well-advised, and each is acting in what it considers its own best interest, (ii) the Premises are fit for immediate 
occupancy and use “as is” (taking into account the factors set forth above in this Section 2.4 for the 
determination of Market Rate), (iii) that in the event the Premises have been damaged by fire or other casualty 
prior to the commencement of the applicable Extended Term, they have been fully restored. The appraisers shall 
also take into consideration the rents contained in leases for comparable space in the Building, or in comparable 
buildings in the greater Somerville area, for comparable periods of time.
If the dispute between the parties as to the Market Rate has not been resolved before the 
commencement of Tenant’s obligation to pay the Annual Fixed Rent based upon determination of such Market 
Rate, then Tenant shall pay the Annual Fixed Rent under the Lease based upon the Market Rate designated by 
Landlord in Landlord’s Notice until either the agreement of the parties as to the Market Rate, or the decision of 
the appraiser(s), as the case may be, at which time Tenant shall pay any underpayment of the Annual Fixed 
Rent to Landlord, or Landlord shall refund any overpayment of the Annual Fixed Rent to Tenant.
Landlord and Tenant hereby waive the right to an evidentiary hearing before the appraiser(s) and agree 
that the appraisal shall not be an arbitration nor be subject to state or federal law relating to arbitrations.
2.5
Measurement of the Premises. Either party hereto may, not later than ten (10) days after the 
Commencement Date, request that an exact measurement of the Premises be made in accordance with the 
Standard Method of Measuring Floor Area in Office Buildings as adopted by the Building Owners and Managers 
Association International (ANSI/BOMA Z65.1-2017). Such measurement shall be made by a licensed architect or 
engineer designated by Landlord at the cost and expense of the requesting party.
If the rentable area of the Premises, as so measured, is more than one hundred one percent (101%) or 
less than ninety-nine percent (99%) of the Premises Rentable Area as set forth in Section 1.1: (i) the definition of 
Premises Rentable Area set forth in Section 1.1 shall be deemed amended in accordance with such 
measurement; (ii) Annual Fixed Rent shall, retroactively to the Commencement Date, be recomputed by 
multiplying the Annual Fixed Rent as set forth in Section 1.1 by a fraction (the “Fraction”), the numerator of which 
shall be the rentable area as so measured and the denominator of which shall be the Premises Rentable Area 
set forth in Section 1.1; (iii) Tenant’s Percentage shall, retroactively to the Commencement Date, be recomputed 
to be the percentage determined by multiplying Tenant’s Percentage as set forth in Section 1.1 by the Fraction, 
and (iv) if applicable, the Allowance shall, retroactively to the Commencement Date, be adjusted by multiplying 
the rentable area as so measured by the Allowance per rentable square foot as set forth in Article 3 below.
 
 
 
 
 
 
 
 
 
 
 
 
 
Any payment due to Landlord as the result of such adjustment shall be paid within thirty
(30) days after notice to Tenant of such computation. Any payment due to Tenant as a result of such adjustment 
shall be credited against installments of Annual Fixed Rent thereafter becoming due.
In the event of any adjustment pursuant to this Section 2.5, Landlord and Tenant shall promptly 
execute a written statement setting forth the recomputed Premise Rentable Area, Annual Fixed Rent, Tenant’s 
Percentage and (if applicable) the Allowance, but the failure by either party to execute such a statement shall 
have no effect on the validity of such recomputation.
If (i) neither Landlord nor Tenant requests any adjustment as herein provided within the time limit 
provided, or (ii) such adjustment is requested, but the rentable area is within the two (2%) percent range set 
forth above, Annual Fixed Rent, Tenant’s Percentage, and Premises Rentable Area shall remain as set forth in 
Section 1.1, and neither Landlord nor Tenant shall have any right to any adjustment and shall not be subject to 
remeasurement.
Article 3 
3.1
Commencement and Condition
Commencement Date. The Commencement Date shall be the date on which
Landlord delivers the Premises to Tenant with Landlord’s Work and Tenant’s Work Substantially Complete, as 
such terms are hereinafter defined. Landlord shall use diligent efforts to cause the Commencement Date to occur 
prior to the Delivery Date; provided, however, that the Commencement Date shall be no earlier than July 1, 2023. 
If the Commencement Date has not occurred by the Delivery Date for reasons other than Force Majeure or 
Tenant Delay (as such terms are hereinafter defined), then for each of the first thirty (30) days of any such failure 
Tenant shall be entitled to a one (1) day delay in the Rent Commencement Date and for each subsequent day of 
any such failure Tenant shall be entitled to a two (2) day delay of the Rent Commencement Date; and if Landlord 
shall fail to deliver the Premises to Tenant by February 28, 2024 (i.e., 180 days after the Delivery Date) for 
reasons other than Force Majeure or Tenant Delay then, in addition to the delays in the Rent Commencement 
Date described above, Tenant shall have the right to terminate this Lease by giving notice to Landlord not later 
than sixty (60) days after the expiration of such one hundred eighty (180) day period; and this Lease shall cease 
and come to an end without further liability or obligation on the part of either party ten (10) days after the giving of 
such notice, it being agreed that time is of the essence with respect to the giving of such notice.
In addition, if Landlord shall fail to deliver the Premises to Tenant by the Delivery Date with Landlord’s 
Work and Tenant’s Work Substantially Complete (“Landlord’s Late Delivery”) for reasons other than Force 
Majeure or Tenant Delay, Landlord shall (a) reimburse Tenant for all amounts paid by Tenant as holdover rent 
over and above the sum of base or fixed rent plus additional rent that was due immediately prior to any such 
holdover over (“Hold Over Rent”) under Tenant’s existing lease (the “Existing Lease”) at 840 Memorial Drive, 
Cambridge, Massachusetts; such payments shall be made to Tenant within thirty (30) days following request for 
reimbursement therefore, given together with reasonable supporting documentation, and (b)
 
 
 
 
 
 
 
 
 
 
 
 
 
Landlord shall indemnify, defend, protect, and hold harmless Tenant and the Tenant Parties from and against any 
and all loss, cost, damage, expense and liability (including, without limitation, court costs and reasonable 
attorneys’ fees) incurred in connection with or arising from such holdover under the Existing Lease and save and 
hold other tenants, agents, employees, patients, visitors, invitees or licensees harmless against any damages, 
liability, claims, causes of action or judgments arising therefrom; provided, however, that Landlord’s 
reimbursement obligations under this clause (b) shall not exceed $1,800,000.00. Landlord hereby acknowledges 
that the Hold Over Rent due under the Existing Lease is due on a monthly basis and, accordingly, if there is a 
Landlord’s Late Delivery of the Premises the Hold Over Rent will not be prorated for a partial month, but shall be 
due for one or more months in their entirety. Upon receipt of notice from Landlord notifying Tenant of Landlord’s 
Late Delivery, Tenant shall use reasonable efforts, at Landlord’s sole cost and expense, to mitigate its damages 
under its Existing Lease including, without limitation, using commercially reasonable efforts to extend the term of 
the Existing Lease in order to avoid being liable for Hold Over Rent and/or requesting that the Hold Over Rent 
due under the Existing Lease be prorated on a daily basis, and Landlord shall pay (i) the
out-of-pocket cost of such efforts made by Tenant and (ii) all payments, rent and additional rent for and during 
such extension term of the Existing Lease as set forth in this Section 3.1. Tenant hereby represents that current 
termination date of the Existing Lease is December 31, 2023 and, unless the Commencement Date occurs on or 
before December 31, 2023, Tenant shall not agree to an earlier expiration or termination of the term of the 
Existing Lease. Tenant’s right to a postponement of the Rent Commencement Date, reimbursement of its 
holdover penalties and
Tenant’s termination right pursuant to this Section 3.1 shall be Tenant’s sole and exclusive remedy at law or in 
equity for Landlord’s failure to Substantially Complete Landlord’s Work and Tenant’s Work and deliver the 
Premises to Tenant as required herein.
3.2
Landlord’s Work. Landlord is in the process of constructing the Building at the Property. 
Landlord, at Landlord’s sole cost and expense shall construct Landlord’s initial construction of the Building 
including, but not limited to, all shell and core improvements for the Building (including the underground parking 
garage), all landscaping, plaza areas, walkways, driveways, sidewalks, Building amenities and other 
improvements on the Land, and shall construct the Building and the Premises and perform certain base building 
improvements to prepare the Premises for Tenant’s Work (as defined below), as such construction and 
improvements are shown on Exhibit A-3 attached hereto, including those items listed under “LL” on the 
Landlord/Tenant Work Matrix (the “Work Matrix”) attached hereto as Exhibit A-4 (collectively, “Landlord’s Work”). 
Landlord’s Work and Tenant’s Work shall be constructed by Consigli Construction (or a licensed and qualified 
contractor with substantial experience in constructing life sciences office and laboratory space reasonably 
selected by Landlord if Landlord reasonably determines that Consigli Construction will not be able to complete
Landlord’s Work and Tenant’s Work) (“Landlord’s Contractor”). Landlord shall cause Landlord’s Contractor to 
construct Landlord’s Work and Tenant’s Work in a good and
workmanlike manner, in accordance with applicable laws and building codes, in compliance with applicable 
permits for Landlord’s Work and Tenant’s Work, and in accordance with Landlord’s Plans and Tenant’s Plans. 
Landlord shall deliver possession of the Premises to Tenant and Tenant agrees to accept the Premises with 
Landlord’s Work and Tenant’s Work Substantially Complete. Tenant acknowledges that except as set forth in this 
Section 3.2, it is not relying on any representations of Landlord or Landlord’s agents or employees as to the 
current condition or
 
 
 
 
 
 
 
 
 
 
the condition of Landlord’s Work or Tenant’s Work, and Landlord shall have no obligation with respect thereto 
except as may be expressly set forth in this Lease.
The materials and equipment furnished in the performance of Landlord’s Work and
Tenant’s Work will be of good quality (consistent with first-class office and laboratory spaces, as the case may 
be), new and of recent manufacture and Landlord’s Work and Tenant’s Work, all components thereof and the 
Building Systems shall be in good working order and condition as of the completion of Landlord’s Work. On the 
Commencement Date the Building including, but not limited to, the roof and foundation will be in good condition 
and leak-free. If it is determined that the roof or foundation is not in such condition as of the Commencement 
Date, Landlord shall cause the same to be put in such condition promptly after having notice thereof, and all 
costs and expenses of such corrective work shall be excluded from Operating Costs.
3.3
(a)
Tenant’s Work.
Tenant shall, not later than August 26, 2022 (the “Design Submission Date”), submit to 
Landlord for Landlord’s approval as set forth herein a set of design development plans (“Interim Plans”) for the 
initial improvements to the Premises desired by Tenant, which Interim Plans shall be consistent with the Work 
Matrix and with the laboratory and office basis of design titled Laboratory Basis of Design dated June 03, 2021, 
and updated as of June 03, 2022, the cover page of which is attached hereto as Exhibit A-5 and the full 
document of which can be found at:
Continue reading text version or see original annual report in PDF format above