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Krystal Biotech, Inc.

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FY2022 Annual Report · Krystal Biotech, Inc.
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_______________________________________________________________________________

FORM 10-K

_______________________________________________________________________________

(Mark One)

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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 Number 001-38210
_______________________________________________________________________________

Krystal Biotech, Inc.

(Exact name of Registrant as specified in its Charter)
_______________________________________________________________________________

Delaware
(State or other jurisdiction of
incorporation or organization)
2100 Wharton Street
Suite 701
Pittsburgh
Pennsylvania
(Address of principal executive offices)

82-1080209
(I.R.S. Employer
Identification No.)

15203
(Zip Code)

Securities registered pursuant to Section 12(b) of the Act:

Registrant’s telephone number, including area code: (412) 586-5830
_______________________________________________________________________________ 

Title of each class

Common Stock

Trading Symbol(s)

KRYS

Name of each exchange on which registered

NASDAQ Capital Market

Securities registered pursuant to Section 12(g) of the 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 15(d) of the 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 Securities Exchange Act of 1934 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. 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). ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒
The aggregate market value of common stock held by non-affiliates of the Registrant, based on the closing sales price for such stock on June 30, 2022 as reported by The Nasdaq Stock Market,
was $1.4 billion.

The number of shares of Registrant’s common stock outstanding as of February 20, 2023 was 25,763,743.

Portions of the Registrant’s definitive proxy statement relating to its 2023 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report 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

Business
Risk Factors
Unresolved Staff Comments
Properties
Legal Proceedings
Mine Safety Disclosures

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
[Reserved]
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information
Disclosure Regarding Foreign Jurisdiction that Prevent Inspections

Directors, Executive Officers and Corporate Governance
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Certain Relationships and Related Transactions, and Director Independence
Principal Accounting Fees and Services

Exhibits, Financial Statement Schedules
Form 10-K Summary

PART I
Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.

PART II
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.
Item 9C.

PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV
Item 15.
Item 16.

Signatures

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FORWARD-LOOKING STATEMENTS

This  Annual  Report  on  Form  10-K  contains  “forward-looking  statements”  within  the  meaning  of  Section  27A  of  the  Securities  Act  of  1933,
as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Forward-looking statements
include all statements that are not historical facts and can be identified by terms such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,”
“intend,”  “may,”  “plan,”  “potential,”  “predict”,  “project,”  “seek,”  “should,”  “target,”  “will,”  “would,”  or  similar  expressions  and  the  negatives  of  those
terms. These statements relate to future events or to our future operating or 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,  performances  or
achievements expressed or implied by the forward-looking statements.

Forward-looking  statements  appearing  in  a  number  of  places  throughout  this  Annual  Report  on  Form  10-K  include,  but  are  not  limited  to,

statements about the following, among other things:

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the initiation, timing, progress and results of preclinical and clinical trials for Beremagene Geperpavec ("B-VEC", previously “KB103” and
now known as Vyjuvek ), KB105, KB104, KB301, KB407, KB408 and any other product candidates, including statements regarding the
timing  of  initiation  and  completion  of  studies  or  trials  and  related  preparatory  work,  the  period  during  which  the  results  of  the  trials  will
become available and our research and development programs;

TM

the impact of public health crises including the COVID-19 pandemic and measures to contain or prevent these outbreaks may have on our
business operations, access to capital, research and development activities, and preclinical and clinical trials for our product candidates;

the  timing,  scope  or  results  of  regulatory  filings  and  approvals,  including  timing  of  final  U.S.  Food  and  Drug  Administration  (“FDA”),
marketing and other regulatory approval of our product candidates;

our ability to achieve certain accelerated or orphan drug designations from the FDA;

our estimates regarding the potential market opportunity for any of our product candidates;

our research and development programs for our product candidates;

our plans and ability to successfully develop and commercialize our product candidates;

our ability to identify and develop new product candidates;

our ability to identify, recruit and retain key personnel;

our commercialization, marketing and manufacturing capabilities and strategy;

the implementation of our business model, strategic plans for our business, product candidates and technology;

the scalability and commercial viability of our proprietary manufacturing methods and processes;

the rate and degree of market acceptance and clinical utility of our product candidates and gene therapy, in general;

our competitive position;

our intellectual property position and our ability to protect and enforce our intellectual property;

our financial performance;

developments and projections relating to our competitors and our industry;

our ability to establish and maintain collaborations;

our estimates regarding expenses, future revenues, capital requirements and needs for or ability to obtain additional financing;

our ability to successfully resolve any intellectual property or other claims that may be brought against us;

the impact of laws and regulations; and

any statements regarding economic conditions, including statements related to the economic fallout from the COVID-19 pandemic and the
impact on our business, or performance and any statement of assumptions underlying any of the foregoing.

Forward-looking  statements  are  subject  to  a  number  of  risks,  uncertainties  and  assumptions,  including  those  described  in  “Risk  Factors,”

“Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in

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this  Annual  Report.  Moreover,  we  operate  in  a  very  competitive  and  rapidly  changing  environment,  and  new  risks  emerge  from  time  to  time.  It  is  not
possible  for  our  management  to  predict  all  risks,  nor  can  we  assess  the  impact  of  all  factors  on  our  business  or  the  extent  to  which  any  factor,  or
combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these
risks, uncertainties and assumptions, the forward-looking events and circumstances discussed in this Annual Report may not occur and actual results could
differ materially and adversely from those anticipated or implied in the forward-looking statements. Given these uncertainties, you should not place undue
reliance on these forward-looking statements. Also, forward-looking statements represent our management’s beliefs and assumptions only as of the date of
this  Annual  Report.  We  undertake  no  obligation  to  release  publicly  any  revisions  to  forward-looking  statements  as  a  result  of  subsequent  events  or
developments, except as required by law. You should read this Annual Report completely and with the understanding that our actual future results may be
materially different from what we expect.

Except as required by law, we assume no obligation to update these forward-looking statements publicly, or to update the reasons actual results

could differ materially from those anticipated in these forward-looking statements, even if new information becomes available in the future.

Throughout this Annual Report, unless the context requires otherwise, all references to “Krystal,” “the Company,” “we,” “our,” “us” or similar

terms refer to Krystal Biotech, Inc., together with its consolidated subsidiaries.

Summary Risk Factors

Our business is subject to a number of risks, including risks that may prevent us from achieving our business objectives or may adversely affect
our business, financial condition, results of operations, cash flows and prospects. These summary risks provide an overview of many of the risks we are
exposed  to  in  the  normal  course  of  our  business  and  are  discussed  more  fully  in  “Risk  Factors”  herein.  These  risks  include,  but  are  not  limited  to,  the
following:

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We  have  incurred  net  losses  since  inception.  We  expect  to  incur  losses  for  the  foreseeable  future  and  may  never  achieve  or  maintain
profitability.

We  may  need  to  raise  additional  funding  in  order  to  receive  approval  for  our  product  candidates.  Such  funding  may  not  be  available  on
acceptable  terms,  or  at  all.  Failure  to  obtain  this  necessary  capital  when  needed  may  force  us  to  delay,  limit  or  terminate  certain  of  our
product development efforts or other operations.

Our ability to use our net operating loss carryforwards and certain tax credit carryforwards may be subject to limitations.

Our limited operating history may make it difficult for you to evaluate the success of our business to date and to assess our future viability.

We are substantially dependent on the commercial success of B-VEC.

The effect of the COVID-19 pandemic or similar public health crises on our operations and the operations of our third-party partners could
cause a disruption of the development efforts for our product candidates and adversely impact our business.

If  we  are  unable  to  advance  our  product  candidates  through  clinical  trials,  obtain  regulatory  approval  and  ultimately  commercialize  our
product candidates, or if we experience significant delays in doing so, our business will be materially harmed.

Our  lead  candidate,  B-VEC,  has  not  received  regulatory  approval,  and  if  we  obtain  regulatory  approval  to  commercialize  B-VEC  the
approval may be for a narrower indication than we seek.

B-VEC is based on a novel technology, which makes it difficult to predict the time and cost of obtaining regulatory approval.

Our  products  may  cause  undesirable  side  effects  or  have  other  properties  that  could  delay  or  prevent  regulatory  approval,  limit  the
commercial potential or result in significant negative consequences following any potential marketing approval.

We may encounter substantial delays in our clinical trials, or we may fail to demonstrate safety and efficacy to the satisfaction of applicable
regulatory authorities.

Even if we obtain regulatory approval for a product candidate, our product candidates will remain subject to regulatory oversight. We will
continue to incur costs related to regulatory compliance and are subject to risks related to non-compliance with or changes to applicable laws
and regulations, which could cause our product candidates to lose approval.

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If we are not successful in discovering, developing and commercializing additional product candidates, our ability to expand our business
and achieve our strategic objectives would be impaired.

We  face  significant  competition  in  an  environment  of  rapid  technological  change  and  the  possibility  that  our  competitors  may  achieve
regulatory approval before us or develop therapies that are more advanced or effective than ours, which may adversely affect our financial
condition and our ability to successfully market or commercialize our product candidates.

Delays  in  obtaining  regulatory  approvals  of  the  process  and  facilities  needed  to  manufacture  our  product  candidates  or  disruptions  in  our
manufacturing process may delay or disrupt our product development and commercialization efforts.

Although we have established our own manufacturing facility for our product candidates, we may need to continue to utilize third parties for
the manufacturing of sterile gel that is mixed with our in-house produced vector for the near future. Therefore, we are subject to the risk that
these third parties may not perform satisfactorily.

If we are unable to expand our market development capabilities or enter into agreements with third parties to market and sell our product
candidates, we may be unable to generate any product revenue.

If we are unable to manage expected growth in the scale and complexity of our operations, our performance may suffer.

If we are unable to obtain and maintain adequate U.S. and foreign patent protection for our product candidates, and/or our vector platform, or
if  the  scope  of  the  patent  protection  obtained  is  not  sufficiently  broad,  our  competitors  could  develop  and  commercialize  products  and
technologies similar or identical to ours, and our ability to successfully commercialize our current product candidates, any future product
candidates we may develop, and our platform technologies may be adversely affected.

Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be
uncertain and could have a material adverse effect on the success of our business.

Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

Our Chief Executive Officer and Chairman of the Board of Directors and our founder, President of R&D and director will have the ability to
substantially influence all matters submitted to stockholders for approval.

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Item 1. Business.

Overview

We  are  a  biotechnology  company  focused  on  developing  and  commercializing  genetic  medicines  for  patients  with  rare  diseases.  Using  our
patented platform that is based on engineered HSV-1, we create vectors that efficiently deliver therapeutic transgenes to cells of interest in multiple organ
systems.  The  cell’s  own  machinery  then  transcribes  and  translates  the  encoded  effector  to  treat  or  prevent  disease.  We  formulate  our  vectors  for  non-
invasive  or  minimally  invasive  routes  of  administration  at  a  healthcare  professional’s  office  or  potentially  in  the  patient’s  home  by  a  healthcare
professional. Our goal is to develop easy-to-use medicines to dramatically improve the lives of patients living with rare diseases and chronic conditions.
Our  innovative  technology  platform  is  supported  by  in-house,  commercial  scale  Current  Good  Manufacturing  Practice  ("CGMP")  manufacturing
capabilities.

Our Redosable Gene Therapy Platform

We believe that certain inherent features of the HSV-1 virus, combined with the modifications we have made to the viral backbone provides our

proprietary gene therapy platform with specific advantages over other viral and non-viral vector platforms including the following:

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Repeat Administration: One of the major challenges with many viral vector platforms is that the host immune system may recognize
them as foreign agents and launch a robust immune response, resulting in toxicity and rapid removal of the virus. Wild-type HSV-1 is
known to persist in the body by becoming latent and hiding from the immune system. We have harnessed the natural ability of HSV-1
to evade host-mediated immunogenicity, while removing specific viral elements that exacerbate the host immunity, thus making our
viral vector safer for repeat administration as needed to achieve durability of effect. The immune evasive properties of our vector also
enable us to treat patients who may have baseline antibodies to HSV-1, ensuring that prior exposure to the wild-type virus will not
limit the number of patients who may be amenable to treatment with our product candidates.

Non-Integrating Nature:  Upon  entry  into  cells,  the  HSV-1  vector  persists  as  an  episomal  unit  in  the  nucleus,  meaning  it  remains
physically  separate  from  the  host  cell  chromosome.  Certain  other  viral  vectors  currently  being  used  in  the  development  of  gene
therapy  treatments,  such  as  the  lentiviral  and  retroviral  vectors,  integrate  into  the  host  cell  DNA  to  achieve  gene  expression.
Integration into the host cell DNA carries the risk of disrupting host genes. In contrast, a non-integrating vector such as our HSV-1
vector does not carry the same risk of disrupting the expression of host cell genes.

Payload Capacity: HSV-1 is a large virus, approximately 150 kilobases, or Kb, of DNA in size. We have made strategic deletions
within  this  genome  to  remove  critical  “immediate  early”,  or  IE,  genes.  These  IE  genes  are  required  for  expression  of  most  of  the
downstream genes that allow the HSV-1 virus to replicate and destroy host cells. Deletion of these IE genes inhibits expression of
most of the viral proteins, making the resulting viral vector replication-deficient and non-toxic. These deletions also enable the vector
to easily accommodate a payload of 35Kb or greater without any significant impact on yield or titer. In our lead product candidate, B-
VEC,  we  have  successfully  inserted  two  functional  copies  of  the  complete  ~9Kb  human  COL7A1  gene.  In  contrast,  packaging
capacity for most other vectors being used is at or under ~10Kb, which limits their ability to deliver large transgenes. In addition, we
believe the high payload capacity of our viral vector will allow us to insert multiple and/or combinations of genes or effectors that
could enable the treatment of non-monogenic conditions.

High  Transduction  Efficiency:  Poor  transduction  efficiency  has  remained  a  major  hurdle  for  direct  delivery  of  most  vectors
particularly in the epithelia of the skin and lung. HSV-1 has a natural affinity, or tropism, for epithelial cells. Consequently, our vector
penetrates and delivers its payload much more efficiently than other vectors, resulting in transduction efficiencies or cell penetration
as high as 95% in cell-based studies. The greater payload capacity of our vector and the high transduction efficiencies achieved allow
us  to  deliver  a  full  gene  (or  genes)  directly  to  any  patient’s  tissues  for  off-the-shelf,  in  vivo  gene  expression  without  additional
manipulation.

Direct Delivery: Our engineered HSV-1 vector allows for noninvasive or minimally invasive local gene delivery. The advantages of
direct  delivery  are  that  our  products  can  be  administered  in  a  doctor’s  office  or  potentially  the  patient’s  home,  requiring  no
hospitalization  or  expensive,  invasive,  and  time-consuming  procedures  or  sophisticated  medical  teams.  Taking  gene  therapy  to  the
patient minimizes patient travel and circumvents upfront logistical burdens typical of other gene therapy approaches.

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Stability: HSV-1 is extremely stable and resistant to degradation by physical shearing, solvents, and enzymes, facilitating purification
and flexibility with final formulation of our product candidates. Our vectors are stable frozen for long-term storage, under refrigerated
conditions for short-term storage and shipment, in addition to being stable over several freeze-thaw cycles. This should facilitate our
ability to ship our products globally from our manufacturing facilities in Pennsylvania.

Reproducible and Scalable Manufacturing: Successful production of viral vectors involves two steps: (i) the ‘upstream’ process,
which  yields  a  bulk  virus  harvest;  and  (ii)  the  ‘downstream’  process,  which  involves  purification  and  concentration  of  the  clinical
product.  Successful  and  reproducible  execution  of  both  processes  is  critical  for  clinical  manufacturing  and  scale-up.  Our  scientific
team  collectively  has  decades  of  experience  and  expertise  in  HSV  engineering  and  purification  that  has  allowed  us  to  successfully
optimize our HSV-1 vector production process and develop in-house Chemistry, Manufacturing and Control (“CMC”) capabilities.

Existing  Regulatory  Precedent:  The  first  FDA-  and  European  Medicines  Agency  (“EMA”)-approved  oncolytic  virus  product,
Imlygic®  by  Amgen,  for  treatment  of  melanoma,  a  skin  cancer,  is  based  on  a  genetically  engineered  HSV-1  virus.  Because  this
product also employs an HSV-1 backbone, it has created a regulatory precedent for approval of an HSV-1-based therapy. In addition,
Imlygic® is a chronic therapy, given bi-weekly, which provides support for the use of an HSV-1 backbone in chronic gene therapy of
the type we are developing.

The above listed benefits of our innovative platform make it the ideal choice for topical and intradermal applications to treat skin diseases, skin

conditions and inhaled formulations to treat respiratory diseases.

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Our Product Candidates

The following table summarizes information regarding our product candidates in various stages of clinical and preclinical development as of the

date of this Annual Report:

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Investigational Beremagene Geperpavec (“B-VEC”) for dystrophic epidermolysis bullosa (“DEB”)

Disease Background

Dermatology

DEB is a rare and severe monogenic skin disease. DEB affects the skin and mucosal tissues and is caused by one or more mutations in a gene
called COL7A1, which is responsible for the formation of the protein type VII collagen ("COL7") that forms anchoring fibrils that bind the dermis (inner
layer  of  the  skin)  to  the  epidermis  (outer  layer  of  the  skin).  In  DEB  patients,  the  genetic  defect  in  COL7A1  results  in  loss  or  malfunctioning  of  these
anchoring fibrils, leading to extremely fragile skin that blisters and tears from minor friction or trauma. Those who are born with DEB are sometimes called
“butterfly children,” because their skin is likened to be as fragile as the wings of a butterfly. DEB patients may suffer from open wounds, skin infections,
fusion of fingers and toes and gastrointestinal tract problems throughout their lifetime, and may eventually develop squamous cell carcinoma, a potentially
fatal condition. We believe that there are, at present, approximately 3,000 diagnosed DEB patients in the United States and approximately 9,000 worldwide.
The current standard of care for DEB patients is limited to palliative measures that seek to provide relief from some of the symptoms of DEB but do not
meaningfully impact disease outcomes. While not disease-modifying, current treatment is estimated to cost between $200,000 and $400,000 annually per
patient in the United States.

B-VEC

B-VEC is a redosable, off-the-shelf gene therapy designed to deliver two copies of the COL7A1 gene when applied topically, directly onto an open
wound. Unlike the current standard of care, B-VEC seeks to treat DEB at the molecular level by providing the patient’s skin cells the template to make
normal COL7 protein, thereby addressing the fundamental disease-causing mechanism. B-VEC was specifically designed to be easily administered by a
healthcare professional in a doctor’s office or potentially at the patient’s home. The FDA and the European Medicines Agency (“EMA”) have each granted
B-VEC orphan drug designation for the treatment of DEB, and the FDA has granted B-VEC fast track designation and rare pediatric designation for the
treatment of DEB. In addition, the FDA granted Regenerative Medicine Advanced Therapy (“RMAT”) to B-VEC for the treatment of DEB and the EMA
granted PRIority MEdicines (“PRIME”), eligibility for B-VEC to treat DEB.

We believe our approach to treating DEB is positively differentiated relative to other known efforts to develop corrective treatments that employ
autologous approaches. Autologous treatments use a patient’s own tissues and cells to manufacture an individualized therapy. Such therapies tend to be
expensive,  invasive  and  time  consuming  to  use,  and  require  extensive  patient  travel,  extended  hospital  stays,  highly  sophisticated  medical  teams  and
procedures.

Clinical Development of B-VEC

We initiated Phase 1 testing of B-VEC in May 2018 at Stanford University, and we announced positive interim results from this clinical study on
two patients in October 2018. The Phase 2 portion of the trial commenced in December 2018 at Stanford University, and we announced positive interim
results from this clinical study on June 24, 2019. In March 2022, results from the complete Phase 1/2 study of topical B-VEC for the treatment of DEB
were published in Nature Medicine.

We initiated a pivotal Phase 3 trial (“GEM-3 trial”) in July 2020. The GEM-3 trial of B-VEC for the treatment of DEB was a randomized, double-
blind, intra-patient placebo-controlled multicenter study designed to evaluate the efficacy and safety of B-VEC for patients suffering from both recessive
and dominant forms of DEB. The trial enrolled 31 participants with DEB, aged 6 months or older at time of consent. In each patient, a primary wound pair
was identified by the investigator; one wound was randomized to receive a weekly topical application of B-VEC and the other to receive placebo. These
primary wounds were treated once weekly for six months until wound closure. If a wound re-opened at any point during the study, weekly dosage resumed
until closure. The dose administered to each wound was dependent on the size of the wound. A maximum vector dose per patient per week was defined on
the  basis  of  preclinical  and  clinical  safety  data.  In  the  event  that  the  maximum  dose  per  patient  had  not  been  reached  based  on  dosing  of  the  primary
wounds,  the  study  investigators  and  patients  had  the  opportunity  to  select  additional  “secondary”  wounds  across  which  the  remaining  weekly  dose  was
applied. We announced positive results from the GEM-3 trial in November 2021 and in December 2022 full results from the GEM-3 trial were published in
the New England Journal of Medicine.

In April 2022, following feedback from the FDA, we announced that we planned to offer patients with DEB, who were enrolled in the GEM-3

open label extension study (“OLE”), the opportunity to be dosed in their homes by a health care professional. Further study details are available at
www.clinicaltrials.gov under NCT identifier NCT04917887. Nothing included on this website shall be deemed incorporated by reference into this Annual
Report on Form 10-K. We are pleased with the on-going progress of the OLE in terms of both patient and physician experiences and plan to provide an
update on the OLE study in 2023.

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We submitted a Biologics License Application (“BLA”) to the FDA for B-VEC for the treatment of DEB in June 2022. The FDA accepted the
BLA in August 2022 granting B-VEC a Priority Review Designation with a Prescription Drug User Fee Act (“PDUFA”) action date of February 17, 2023.
In  January  2023,  the  FDA  notified  us,  that  based  on  manufacturing  information  submitted  to  the  agency  on  December  20,  2022  in  response  to  an
information request from the FDA, the PDUFA date has been revised to May 19, 2023. In this notification, we were also informed that there will be no
Advisory  Committee  meeting  for  B-VEC,  and  that  a  Risk  Evaluation  and  Mitigation  Strategies  (“REMS”)  program  was  not  needed  for  the  B-VEC
application.

We submitted a request for Marketing Authorization Application (“MAA”) with the European Medicines Agency (“EMA”) in November 2022 for
B-VEC  for  the  treatment  of  DEB  in  patients  6  months  and  older.  The  Company  was  informed  by  the  EMA  in  January  2023  to  modify  the  PIP  waiver
request to include patients between birth and 6 months. The Company is modifying the application so that the MAA procedure can officially start in the
second half of 2023 with an approval expected in early 2024.

Commercial readiness efforts have been underway for the past two years as we prepare for the potential approval of B-VEC by the FDA and the
EMA. In the United States, our Medical Science Liaisons have been interacting with and educating health care professionals (“HCPs”) on DEB and the
importance of genetic testing in ensuring an accurate diagnosis. We have completed the build of Krystal Connect, our US in-house patient services call
center staffed with Krystal employees, and are ready, pending FDA approval of B-VEC, to assist patients, care givers and HCPs interested in accessing B-
VEC.  Additionally,  we  have  hired,  trained  and  deployed  commercial  field  teams  who  are  interacting  with  physicians,  patients,  and  commercial  payers
across  the  U.S.  to  educate  on  DEB  and  to  prepare  for  a  U.S.  launch  of  B-VEC.  We  are  interacting  frequently  with  the  leading  physicians  in  the  major
markets across Europe and in Japan.

KB105 for TGM1-deficient autosomal recessive congenital ichthyosis (“ARCI”)

Disease Background

ARCI is a life-long, severe monogenic skin disease. While a number of genetic mutations have been associated with the development of ARCI,
the most common cause of ARCI is an inactivating mutation in the human transglutaminase-1 (“TGM1”) gene encoding the enzyme transglutaminase-1, a
protein that is essential for the proper formation of the skin barrier. Mutations in the TGM1 gene, and the subsequent disruption to the epidermal barrier,
leads  to  pronounced  dehydration,  trans-epidermal  exposure  to  unwanted  toxins  and  surface  microorganisms,  and  a  greatly  increased  risk  of  infection.
Transglutaminase-1 deficiency is associated with increased mortality in the neonatal period and has a dramatic impact on quality of life.

Patients suffering from ARCI often exhibit life-long pronounced plate-like scaling of the skin, which is often of a dark color and can cover the
whole  body.  Such  patients  frequently  suffer  from  exposure  of  the  inner  eyelid  surface  due  to  turning  away  of  the  eyelids  from  the  eye  (ectropion),  the
turning outwards of the lips (eclabium), deformities of joint and nasal cartilage (hypoplasia), scarring alopecia (especially at the edge of the scalp) and a
thickening of the skin on the palms of the hands and soles of the feet (palmoplantar keratoderma). Additional complications experienced by ARCI patients
include episodes of sepsis, fluid and electrolyte imbalances due to impaired skin barrier function, and failure to thrive, especially during the neonatal period
and infancy. Severe heat intolerance and nail dystrophy are also frequently observed. There are currently no treatments targeting molecular correction of
this disease. There are approximately 20,000 cases of TGM1-deficient ARCI worldwide and about 400 new cases per year globally.

KB105

KB105 is a redosable, off the-shelf gene therapy designed to deliver two copies of the TGM1 gene when applied topically, directly to a patient’s
exfoliated skin. The goal of direct supplementation of TGM1 protein at the site of administration is local correction and phenotypic improvement. Like B-
VEC, KB105 was designed to be easily administered by a healthcare professional in the doctor’s office or, potentially, at the patient’s home.

The FDA and the EMA have each granted KB105 orphan drug designation for the treatment of TGM1-ARCI, and the FDA has granted KB105

fast track designation and rare pediatric designation for the treatment of TGM1-ARCI.

Clinical Development of KB105

In September 2019 we initiated a Phase 1/2 trial in TGM1-ARCI patients. In May 2020, initial clinical data from the Phase 1 portion of the study
which enrolled adult patients were presented at the Society for Investigative Dermatology (“SID”) meeting. In August 2020, we initiated the second phase
of our Phase 2 portion of the clinical trial of KB105 to treat ARCI. We enrolled one patient in whom four rectangular 100cm2 (4-inch x 4-inch) areas of
skin were selected as Target Areas (TAs). Each treatment area was assigned to receive repeat doses of 4.0x109 PFU (n=2 treatment areas) or 1.0x1010 PFU
(n=2

8

treatment  areas).  Each  area  was  dosed  on  Day  1  and  3,  after  which  dosing  continued  either  every  3  days  (n=2  treatment  areas)  or  every  6  days  (n=2
treatment areas) up to day 30. Treatment areas were clinically evaluated at pre- and post-KB105 application timepoints, using a 5-point IGA scale (0 =
clear; 1 = almost clear; 2 = mild; 3 = moderate; 4 = very severe). In July 2021, we announced initial Phase 2 data.

Repeated topical doses of KB105 were well tolerated, and no drug-related adverse effects were reported. No vector shedding or systemic viral
exposure was detected at any time point. Improvement on the IGA scale was observed in each treatment area, with the maximum effect observed in TA3
and TA4 that received the highest dose; at day 27, the investigator assigned an IGA score of 2, which was improved as compared to baseline score of 4 in
each area. Variable 1-point improvements were observed at other time points and in the treatment areas that received the lowest dose. As in the Phase 1
portion of the trial, TGM1 turnover was observed to be variable but relatively rapid, and the observed IGA improvements were not sustained through day
60.

We plan to resume enrollment in the Phase 2 portion of this trial in the first half of 2023.

KB104 for Netherton Syndrome

Disease Background

Netherton  Syndrome  is  a  debilitating  monogenic  autosomal  recessive  skin  disorder.  The  disease  arises  due  to  mutations  in  the  Serine  Protease
Inhibitor Kazal-type 5 (“SPINK5”)  gene,  resulting  in  loss  of  activity  of  its  encoded  serine  protease  inhibitor  protein  SPINK5  (also  known  as  Lympho-
Epithelial Kazal type-related Inhibitor (“LEKTI”)). In healthy individuals, SPINK5 is one of the serine protease inhibitors expressed in the outermost layers
of the skin, and it plays a critical role in the regulation of serine proteases which hydrolyze extracellular proteins that hold corneocytes together. In patients
suffering from Netherton Syndrome, the suppressive effects of SPINK5 on these serine proteases is abolished due to underlying genetic mutations in the
SPINK5 gene. Consequently, hyperactivated serine proteases in the skin cause uncontrolled desquamation, leading to a defective skin barrier.

In infants, severe Netherton Syndrome can be associated with failure to thrive, hypernatremic dehydration secondary to excess fluid loss, delayed
growth,  short  stature,  and  recurrent  infections.  Clinically,  Netherton  Syndrome  is  characterized  by  congenital  ichthyosiform  erythroderma,  hair  shaft
defects, recurrent infections, and a defective skin barrier. A predisposition to allergies, asthma, and eczema is also characteristic of Netherton Syndrome.
Ultimately, those afflicted by Netherton Syndrome often experience chronic skin inflammation, severe dehydration, and stunted growth.

There are approximately 38,000 cases of patients worldwide and about 700 new cases per year globally. There are no current approved treatments

for Netherton Syndrome. Existing approaches are limited to palliative treatments, including topical moisturizers, repair formulas and steroids.

KB104

KB104 is a redoseable off-the-shelf gene therapy designed to deliver two copies of the SPINK5 gene to relevant skin cells when applied topically.
By directly supplementing the skin with functional SPINK5, the goal of therapy is to locally correct the desquamation and improve the barrier function of
the skin. In preclinical testing a properly localized human SPINK5 gene was detected 48 hours after topical KB104 application in mice without toxicity.
KB104-mediated human SPINK5 was expressed in the correct layer of skin at the transcript and protein levels.

The FDA has granted KB104 rare pediatric designation for the treatment of Netherton Syndrome.

We plan to file an investigational new drug (“IND”) application with the FDA and initiate a clinical trial of KB104 in Netherton Syndrome in

2023.

KB407 for Cystic Fibrosis (“CF”)

Disease Background

Respiratory

CF  is  the  most  common  inherited  genetic  disorder  in  the  United  States  and  is  caused  by  mutations  in  the  cystic  fibrosis  transmembrane
conductance regulator (“CFTR”) gene. Lack of functional CFTR protein in secretory airway epithelia results in defective Cl-, bicarbonate, and thiocyanate
secretion,  coupled  with  enhanced  Na+  absorption  and  mucus  production,  leading  to  dehydration  and  acidification  of  the  airway  surface  liquid.  CF  is
characterized  by  recurrent  chest  infections,  increased  airway  secretions,  and  eventually,  respiratory  failure.  While  CF  comprises  a  multiorgan  pathology
affecting the upper and lower

9

airways, gastrointestinal and reproductive tracts, and the endocrine system, the primary cause of morbidity and mortality in CF is due to progressive lung
destruction.

According to the U.S. Cystic Fibrosis Foundation (“CFF”), the median age at death for patients with CF in the United States was 30.8 years in
2018. Currently approved CFTR modulating therapies are limited to patients with specific genetic mutations and there is a significant unmet medical need
for  the  approximately  10%  of  patients  with  CF  who  have  genetic  mutations  non-amenable  to  currently  approved  CFTR  small  molecule  “modulators”.
According to the CFF, approximately 30,000 patients in the United States and more than 70,000 patients worldwide are living with CF, and approximately
850 new cases of CF were diagnosed in 2018.

KB407

KB407 is a redosable off the-shelf gene therapy designed to deliver two copies of the full-length CFTR transgene directly to the airway epithelia
via  inhaled  (nebulized)  administration.  By  inducing  expression  of  full  length,  normal  CFTR  protein  in  the  lung,  treatment  with  KB407  has  potential  to
restore  ion  and  water  flow  into  and  out  of  lung  cells  to  correct  the  lung  manifestations  of  the  disease  in  patients  regardless  of  their  underlying  genetic
mutation. Preclinical efforts to date have shown that KB407 successfully transduces patient-derived epithelial cells and delivers functional CFTR in vitro in
2D and 3D organotypic systems, and is amendable to non-invasive inhaled administration in vivo, as indicated by successful delivery to the lungs through
the use of a clinically relevant nebulizer in small animal models. Successful delivery and distribution throughout the lung also was observed in a nonhuman
primate.

The FDA and the EMA have each granted KB407 orphan drug designation for the treatment of cystic fibrosis, and the FDA has granted KB407

rare pediatric designation for the treatment of cystic fibrosis.

Clinical Development of KB407

In September 2021, we announced that we were granted approval by the Bellberry Human Research Ethics Committee (“HREC”) in Australia to
conduct a Phase 1 clinical study of inhaled KB407 in patients with CF. We previously received license to evaluate KB407 from Australia's Office of the
Gene Technology Regulator (“OGTR”). We plan to dose our first patient in the Phase 1 clinical trial in Australia in the first half of 2023.

We announced, in August 2022, that the FDA had accepted our IND application to evaluate KB407 in a clinical trial to treat patients with CF. We

are closely working with the Therapeutics Development Network (“TDN”) of the CFF to validate our clinical protocol and plan on initiating a Phase 1
clinical trial in the U.S. in the first half of 2023.

KB408 for Alpha-1 antitrypsin deficiency (“AATD”)

Disease Background

AATD is a genetic condition caused by mutations that lead to decreased levels and/or decreased functionality of the alpha-1- antitrypsin (“AAT”)
protein. AATD lung disease is a consequence of diminished or absent functional protein in the lungs due to impaired transport into, and low concentrations
in,  patient  plasma.  Low  AAT  serum  levels  can  result  in  life  threatening,  progressive  pulmonary  impairment  and  severe  respiratory  insufficiency,
manifesting  as  chronic  obstructive  pulmonary  disease  (“COPD”)  and  panacinar  emphysema.  The  lung  degeneration  observed  in  AATD  patients  derives
from an unopposed, and therefore enhanced, neutrophil elastase (“NE”) activity, leading to an excessive degradation of elastin, collagen, and fibronectin.
The absence of proper NE inactivation by functional AAT ultimately results in lung tissue destruction, airway obstruction, and an increased inflammation
state that compromises the integrity of the organ and contributes to an inadequate response to insults, including inefficient pulmonary bacterial clearance.

There are an estimated 90,000 to 100,000 people in the U.S. with severe AAT deficiency. Currently, many AATD patients undergo “augmentation
therapy” consisting of weekly intravenous (“IV”) infusions of either plasma-purified AAT or recombinant AAT. This therapy requires burdensome weekly
IV infusions and often includes the risk of exposure to bloodborne pathogens connected with the use of blood-derived products.

KB408

KB408 is an inhaled (nebulized) formulation of our proprietary vector, designed to deliver two copies of the SERPINA1 transgene that encodes
functional,  full-length  human  protein,  for  the  treatment  of  AATD.  Preclinical  studies  to  date  have  shown  that  KB408  successfully  transduces  patient-
derived lung epithelial cells in vitro, leading to production and secretion of full-length human AAT protein capable of irreversibly binding its cognate target
NE. In small animal models, analysis of lung tissue biopsies, serum, and bronchoalveolar lavage fluid harvested 24 and 48 hours after inhalation of KB408
shows secretion of full-length AAT protein, with no evidence of significant or systemic toxicity.

10

We are planning to file an IND for KB408 to treat AATD patients in 2023.

Aesthetics

While  our  focus  is  on  the  development  of  gene  therapies  to  treat  serious  rare  diseases,  we  are  also  evaluating  the  potential  of  our  platform  to
address more prevalent and/or non-genetic conditions. To that end, in April 2019, we incorporated Jeune Aesthetics, Inc. (“Jeune Aesthetics”), a wholly-
owned subsidiary, for the purposes of undertaking preclinical and clinical studies for aesthetic skin conditions.

KB301 for aesthetic skin conditions

Disease Background

The  skin  is  largely  composed  of  collagen-rich  connective  tissue,  with  dermal  collagen,  composed  primarily  of  types  1  and  3  collagen  fibrils,
representing  >90%  (dry  weight)  of  human  skin.  The  characteristics  of  skin  aging  are  largely  due  to  aberrant  collagen  homeostasis,  including  reduced
collagen biosynthesis, increased collagen fibril fragmentation, and progressive loss of dermal collagen culminating in a net collagen deficiency, resulting
from both intrinsic (e.g., passage of time, genetics) and extrinsic (e.g., chronic light exposure, pollution) pressures.

Facial  injectables,  including  hyaluronic  acid,  botulinum  toxin  type  A,  collagen,  polymer  fillers,  and  calcium  hydroxyapatite  microparticles,  are
intended to correct perceived facial defects (e.g., fine lines, shallow wrinkles, and deeper furrows), and are administered for both cosmetic and therapeutic
indications. In 2017, the global facial injectables market generated more than $7.2 billion in revenue from approximately 8.5 million procedures performed,
with a majority (~70%) of revenue being generated in the aesthetic setting. While the United States and Europe represent the largest markets for facial
injectables  to-date,  significant  expansion  in  market  share  is  projected  for  Asia  and  Latin  America  in  the  coming  years.  Due  to  the  rising  awareness  of
cosmetic  procedures,  the  growing  geriatric  population,  and  a  shift  from  invasive  to  minimally/non-invasive  treatment  options,  the  aesthetics  facial
injectables market is projected to grow to more than a $12 billion industry by 2025.

KB301

KB301 leverages our clinical experience in delivering genes of interest to the skin, and is designed to stimulate biorejuvenation of the skin via
delivery of the gene that encodes for type III collagen (“COL3”) when administered via intradermal injection. We believe that our approach of directed
expression  of  full-length  human  type  III  collagen  via  intradermal  application  of  KB301  provides  a  unique  and  straightforward  approach  to  restoring
collagen homeostasis, and by extension, reconstructing an optimal physiologic environment in the skin to treat wrinkles or other presentations of aged or
damaged skin.

Clinical development of KB301

We initiated a Phase 1 clinical trial, the PEARL-1 trial, for the treatment of aesthetic skin conditions in August 2020. The Phase 1 dose-ranging
trial evaluated the safety, tolerability, and initial efficacy of intradermal injections of KB301 in adult subjects aged 18-75 (NCT04540900). KB301 was well
tolerated, and we were able to biopsy and demonstrate proof-of-mechanism. Complete results from Cohort 1 focused on safety were presented at the 2021
SID Annual Meeting.

In March 2022, we announced positive proof-of-concept efficacy and safety data from Cohort 2 of the PEARL-1 study of KB301 for the treatment
of aesthetic skin indications. Cohort 2 was a randomized, double-blind, placebo-controlled clinical trial that evaluated the safety and efficacy of KB301 for
the  improvement  of  fine  lines  and  skin  texture  in  the  lower  and  upper  cheek  and  for  improvement  in  skin  thickness  in  the  knee.  Cohort  2  enrolled  27
subjects  across  two  trial  sites.  Bilateral  treatment  areas  included  the  neck  behind  the  ear  to  assess  initial  safety  and  on  the  cheek  below  and  above  the
zygomatic arch (lower and upper cheek), and around the knee. Subjects were randomized 2:1 to receive low dose KB301 or placebo in the upper cheek and
knee as multiple micro depot injections over the selected treatment area with a 33 G needle. Subjects receiving KB301 in the lower check were randomized
2:1 to receive either low dose KB301, high dose KB301 or placebo. Four patients dropped out of the Cohort 2 study – one subject following the initial
safety assessment behind the ear, two subjects for unspecified reasons, and one subject due to unevenness in face between active and placebo during the
study.

A subset of subjects from the PEARL-1 Cohort 2 trial (Cohort 3) were enrolled into a durability trial to look for duration of effect, reduction of the
unevenness in placebo treated sites, and for long term safety monitoring. Ten subjects from the PEARL-1 Cohort 2 study were enrolled in the durability
trial, an open-label study to assess duration of effect below the zygomatic arch (the lower cheek area). The extension cohort enrolled subjects who had
received  the  high  dose  regimen  of  KB301  during  the  efficacy  cohort  in  one  or  both  of  their  lower  cheeks.  Subject  Satisfaction  Scores  and  Investigator
Assessments were measured monthly for three consecutive visits that correspond to timepoints up to nine-months following

11

administration of the last dose of KB301. In addition, subjects with placebo-treated lower cheeks were dosed with KB301 during the open-label extension
cohort to normalize their appearance. In November 2022, we announced nine-month durability of effect in Cohort 3 of the PEARL-1 study of KB301.

We are planning to initiate a Phase 2 study in fine lines in 2023.

Future Opportunities

We believe the ability to redose, as well as the large payload capacity of our proprietary vectors, will allow us to deliver multiple genes and other
effectors, which could enable development of therapies to treat non-monogenic skin diseases like psoriasis and atopic dermatitis, as well as conditions that
are  not  necessarily  the  result  of  an  inherited  genetic  defect,  such  as  chronic  wounds.  For  example,  as  proof-of  concept  we  have  generated  a  library  of
vectors  designed  to  deliver  anti-inflammatory  antibodies.  Further,  we  evaluated  one  of  these  vectors  in  an  animal  model  of  atopic  dermatitis  where
expression of the vector-encoded-antibody was confirmed and efficacy was observed.

If we are able to successfully generate product candidates to treat these non-orphan diseases, we intend to seek collaborative alliances towards the

development and potential commercialization of these therapies.

Manufacturing

In-House CGMP Facilities

We  have  built  in-house  CGMP  facilities  to  enable  better  quality  control,  shorten  lead  times,  lower  costs  and  strengthen  command  over  our
intellectual property. Our first facility, ANCORIS, a commercial scale CGMP-compliant manufacturing facility, is producing the long-term extension study
material for B-VEC at commercial scale, and we expect to produce initial commercial launch material of B-VEC at the facility following FDA approval. In
December 2022, the FDA completed a successful audit of our ANCORIS facility as part of the B-VEC BLA review process.

Our  second  commercial  scale  CGMP  facility,  ASTRA,  is  expected  to  be  completed  and  validated  in  2023.  It  is  a  state-of-the-art  CGMP
manufacturing facility that, in addition to adding significant capacity to support the growing pipeline, will also allow the in-house incorporation of raw
material preparation, excipient manufacturing, testing, packaging, labeling and distribution, thereby fully integrating all components of the supply chain
from starting materials to patient experience. We announced the ground breaking of ASTRA in January 2020. We are planning to initiate our first GMP run
in ASTRA in 1H 2023.

Our proprietary manufacturing process which was initially developed for B-VEC and is now being used across our platform, was developed and
optimized  internally  and  involves  both  an  upstream  production  process  and  downstream  purification  process.  Recombinant  viral  vectors  are  rendered
incapable of, or attenuated for, replacing in human cells by removal of specific viral machinery, including packaging proteins. However, to produce the
recombinant virus, these viral proteins have to be re-introduced into the virus production process so that the viral vector can be packaged. In most other
viral vector production systems, the missing viral proteins are supplied in one or more individual helper plasmids, along with the base viral vector plasmid.
All the plasmids are then co-transfected into a production cell line in the presence of a transfection agent to facilitate viral vector production and packaging.
The  difficulty  of  this  approach  is  that  it  requires  c-scale  manufacturing  and  qualification  of  each  of  the  packaging  plasmids  and  optimization  of  the
transfection method. Even with optimized reagents and methods, significant batch-to-batch variability is seen in viral vector yield and titer that, we believe,
drives up the cost of viral vector manufacturing and scale-up and increases the risk of failure during manufacturing.

Our proprietary upstream process for HSV-1 production avoids the aforementioned issues. Our process requires three critical components:

•

•

•

Production of a master virus seed stock (“MVSS”);

Production of complementing master cell bank (“MCB”); and

Optimized transduction parameters.

For each of our product candidates, we generate a MVSS which is scaled up from a single purified clone of the modified HSV-1 vector expressing
the therapeutic effector. The MCB is a complementing cell line that stably expresses the HSV-1 viral proteins that are required for HSV-1 growth but have
been  deleted  from  the  recombinant  HSV-1  backbone.  By  introducing  the  deleted  proteins  into  the  MCB,  as  opposed  to  including  them  in  the  viral
replication process via co-transfection of individual plasmids, we eliminate the need for multiple qualifications of the plasmids or variability in transfection
efficiency  from  batch  to  batch,  that  other  production  processes  face.  Infection  of  the  MCB  with  the  MVSS  at  the  optimal  concentration  results  in
production of the viral particle. Once the MCB, the MVSS, and the conditions of infection are established, virus

12

production and resultant yield and titer are highly reproducible and scalable over multiple runs, and the risk of failure is minimal.

Optimization  of  MCB,  MVSS  and  production  methods  requires  extensive  knowledge  and  technical  experience  with  the  HSV-1  genome  and
significant upfront effort to design and select the best virus seed stock and complementing cell line. To date we have screened hundreds of cell line clones
to find the best complementing cell lines, and similarly designed and generated the optimal virus seed stocks for each of our product candidates. The viral
seed  stock  expresses  the  therapeutic  proteins  under  the  control  of  strong  constitutive  or  tissue-specific  promoters  and  additional  non-coding  regulatory
sequences have been included to optimize gene expression. We also have optimized the transduction conditions to reproducibly obtain high yields of the
virus.

Unlike the upstream process, steps used to purify and concentrate the viral vector product are often common across different viral vector platforms
and  usually  involve  multiple  stages  of  purification,  clarification,  concentration,  and  diafiltration,  with  the  ultimate  goal  to  remove  contaminants  and
concentrate the product. We have developed a robust and reproducible process for purifying our viral vector to required concentrations for clinical use,
while successfully removing contaminants to meet FDA guidelines.

We believe that the MVSS and MCB are a vital part of the production of our product candidates, as they ensure the reproducible production of

multiple clinical and potentially commercial batches in a short six-week cycle time frame and in a cost-effective manner.

We  have  made  significant  investments  in  developing  the  most  comprehensive  and  optimized  manufacturing  process  for  our  vector  product

candidates including:

A  proprietary  vector  manufacturing  technique  and  a  series  of  high-efficiency  purification  processes  that  produce          highly  purified
therapeutic vectors and can be adapted for each product candidate; and

A critical list of CGMP assays to accurately characterize our process and the HSV-1 vectors we produce.

•

•

Competition

The  biotechnology  and  pharmaceutical  industries  are  highly  competitive.  In  particular,  the  field  of  gene  therapy  is  characterized  by  rapidly
advancing technologies, intense competition and a strong emphasis on proprietary products. Some of our competitors have substantially greater financial
resources and larger research and development organizations. In addition, our experience in clinical trials, obtaining FDA and other regulatory approvals,
and manufacturing and commercialization of products may be more limited.

Epidermolysis Bullosa

A number of companies are developing drug candidates for EB. There is no approved treatment for DEB at this time. We believe our competitors

fall into two broad categories:

•

•

Corrective approaches: We are aware of two companies, Abeona and Castle Creek Pharmaceuticals, which are developing autologous or
grafting gene therapy approaches to treating DEB. We are also aware of a recombinant-protein based approach being developed by Phoenix
Tissue Repair.

Palliative  Treatments:  We  are  aware  of  companies,  such  as  Amryt  Pharmaceuticals  and  Castle  Creek  Pharmaceuticals,  which  are
developing product candidates taking a palliative approach to treating the disease.

Autosomal Recessive Congenital Ichthyosis

We are aware of companies such as Novartis Inc. and Patagonia Pharmaceuticals, LLC who have conducted clinical trials for ARCI in the past.

We are unaware of any companies conducting active clinical trials in ARCI presently.

Netherton Syndrome

We are aware that Novartis Inc. has conducted clinical trials for Netherton Syndrome. We are unaware of any companies currently conducting

active clinical trials in Netherton Syndrome presently.

Cystic Fibrosis

We are aware of several preclinical or early clinical stage nucleic-acid-based programs for the treatment of CF including TranslateBio, ReCode

Therapeutics, Spirovant, and 4D Molecular Therapeutics.

13

Intellectual Property

Our success depends in part on our ability to maintain proprietary protection surrounding our product candidates, platform technology, and know-
how,  to  operate  without  infringing  the  proprietary  rights  of  others,  and  to  prevent  others  from  infringing  our  proprietary  rights.  We  have  a  portfolio  of
patents, patent applications and other intellectual property owned entirely by the Company that protect our core platform technology and products based
thereupon, and affords us freedom to use this platform for the development of novel therapeutics for multiple applications. We continue to advance our
intellectual property portfolio actively through the filing of new patent applications, divisionals, and continuations relating to our technologies as we deem
appropriate.

In addition to our patents, we rely on trade secrets and know-how to develop and maintain our competitive position. However, trade secrets can be
difficult  to  protect.  We  seek  to  protect  our  proprietary  technology  and  processes,  and  obtain  and  maintain  ownership  of  certain  technologies,  in  part,
through  confidentiality  agreements  and  intellectual  property  assignment  agreements  with  our  employees,  consultants  and  commercial  partners.  We  also
seek to preserve the integrity and confidentiality of our data, trade secrets, and know-how, including by implementing measures intended to maintain the
physical and electronic security of our research and manufacturing facilities, as well as our information technology systems.

Platform

Patent Number

Country /
Region*

U.S. 10,441,614

United States

U.S. 11,185,564

United States

B-VEC (Beremagene Geperpavec)

Patent Number

Country /
Region*

U.S. 9,877,990

United States

U.S. 10,155,016

United States

EP 3 377 637 B1

Europe

Patent Type

Expiration Date** Owner / Licensor

Composition of Matter & Methods of Use – The Skin
TARgeted Delivery platform, or STAR-D, for skin-targeted
therapeutics, as well as methods of its use for delivering any
effector of interest to the skin
Methods of Use
– Methods of their using replication-defective HSV vectors for
delivering any effector as skin-target therapeutics interest to the
skin.

12/28/2036

Krystal

12/28/2036

Krystal

Patent Type

Expiration Date** Owner / Licensor

Composition of Matter & Methods of Use – Compositions
comprising HSV vectors encoding certain effectors, including
the effector encoded in B-VEC, and methods of using the same
for providing prophylactic, palliative or therapeutic relief of a
wound, disorder or disease of the skin

Composition of Matter – Covers compositions containing B-
VEC, formulated for alternate routes of administration
Composition of Matter – Pharmaceutical compositions
comprising B-VEC, as well as uses thereof, including for
providing prophylactic, palliative or therapeutic relief of a
wound, disorder or disease of the skin.

12/28/2036

Krystal

12/28/2036

Krystal

12/28/2036

Krystal

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KB105

Patent Number

Country /
Region*

U.S. 10,525,090

United States

KB301

Patent Number

Country /
Region*

U.S. 10,786,438

United States

KB407

Patent Number

Country /
Region*

U.S. 10,829,529

United States

Patent Type

Expiration Date** Owner / Licensor

Composition of Matter & Methods of Use – KB105, as well
as medical applications of this product for treating TGM1-
deficient ARC

4/11/2039

Krystal

Patent Type

Expiration Date** Owner / Licensor

Composition of Matter & Methods of Use – Pharmaceutical
compositions comprising HSV vectors encoding one or more
cosmetic proteins, as well as methods of their use for improving
skin condition, quality, and/or appearance.

4/26/2039

Krystal

Patent Type

Expiration Date** Owner / Licensor

Methods of Use –
Methods of using KB407 for the treatment of cystic fibrosis and
other diseases causing progressive lung destruction

2/07/2040

Krystal

*

**

Granted patents in the U.S. and Europe ("EP") are shown. Additional patent protection in the U.S. and Europe or other countries or regions through pending or granted counterparts may be available.

Stated expiration dates do not account for any patent term extension, supplemental protection certificate, or pediatric extensions that may be available.

Government Regulation and Product Approval

In  the  United  States,  the  FDA  regulates  biologic  products  including  gene  therapy  products  under  the  Federal  Food,  Drug,  and  Cosmetic  Act
(“FDCA”), the Public Health Service Act (“PHSA”), and regulations and guidance implementing these laws. The FDCA, PHSA and their corresponding
regulations govern, among other things, the testing, manufacturing, safety, efficacy, labeling, packaging, storage, record keeping, distribution, reporting,
importation, advertising and other promotional practices involving biologic products. IND applications to the FDA are required before conducting human
clinical testing of biologic products. Additionally, each clinical trial protocol for a gene therapy product candidate is reviewed by the FDA, and in limited
instances the National Institutes of Health (“NIH”), through its Recombinant DNA Advisory Committee, or RAC. The FDA’s authorization also must be
obtained before marketing of biologic products. The process of obtaining regulatory approvals or licenses and the subsequent compliance with appropriate
federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources and we may not be able to obtain
the required regulatory approvals to successfully develop and commercialize our product candidates.

Within the FDA, the Center for Biologics Evaluation and Research (“CBER”) regulates gene therapy products. Within CBER, the review of gene
therapy  and  related  products  is  in  the  Office  of  Therapeutic  Products  (“OTP”)  and  the  FDA  has  established  the  Cellular,  Tissue  and  Gene  Therapies
Advisory Committee (“CTGTAC”) to advise CBER on its reviews. CBER works closely with the NIH and the RAC, which makes recommendations to the
NIH on gene therapy issues and engages in a public discussion of scientific, safety, ethical and societal issues related to proposed and ongoing gene therapy
protocols. The FDA has provided guidance for the development of gene therapy products generally, including a growing body of guidance documents on
CMC clinical investigations and other areas of gene therapy development, all of which are intended to facilitate the industry’s development of gene therapy
products.

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Ethical,  social  and  legal  concerns  about  gene  therapy,  genetic  testing  and  genetic  research  could  result  in  additional  regulations  restricting  or
prohibiting the processes we may use. Federal and state agencies, congressional committees and foreign governments have expressed interest in further
regulating biotechnology. More restrictive regulations or claims that our products are unsafe or pose a hazard could prevent us from commercializing any
products. New government requirements may be established that could delay or prevent regulatory approval of our product candidates under development.
It is impossible to predict whether legislative changes will be enacted, regulations, policies or guidance changed, or interpretations by agencies or courts
changed, or what the impact of such changes, if any, may be.

U.S. Biologic Products Development Process

The  FDA  must  authorize  the  marketing  of  a  product  candidate  for  marketing  in  the  United  States.  The  process  required  by  the  FDA  before  a

biologic product candidate may be marketed in the United States generally involves the following:

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completion  of  preclinical  laboratory  tests  and  in  vivo  studies  in  accordance  with  the  FDA’s  current  Good  Laboratory  Practice  (“GLP”),
regulations and applicable requirements for the humane use of laboratory animals or other applicable regulations;

submission to the FDA of an IND application, which allows human clinical trials to begin unless FDA objects within 30 days;

approval by each clinical trial site’s Institutional Review Board (“IRB”) and Institutional Biosafety Committee (“IBC”), before the clinical
trial may be initiated;

performance of adequate and well-controlled human clinical trials according to the FDA’s Good Clinical Practice (“GCP”) regulations and
any additional requirements for the protection of human research subjects and their health information, to establish the safety and efficacy of
the proposed biologic product candidate for its intended use;

preparation  and  submission  to  the  FDA  of  an  application  for  marketing  approval  that  includes  substantial  evidence  of  safety,  purity  and
potency from results of nonclinical testing and clinical trials;

review of the product by an FDA advisory committee, if applicable;

satisfactory completion of an FDA inspection of the manufacturing facility or facilities where the biologic product candidate is produced to
assess  compliance  with  CGMP  requirements  and  to  assure  that  the  facilities,  methods  and  controls  are  adequate  to  preserve  the  biologic
product candidate’s identity, safety, strength, quality, potency and purity;

potential FDA audit of the nonclinical and clinical trial sites that generated the data in support of the application; and

payment of user fees and FDA review and marketing authorization..

Before testing any new biologic product candidate in humans, including a gene therapy product candidate, the product candidate must undergo
preclinical testing. Preclinical tests include laboratory evaluations of product chemistry, toxicity and formulation, as well as in vivo studies to assess the
potential safety and activity of the product candidate and to establish a rationale for therapeutic use. The conduct of the preclinical tests must comply with
federal regulations and requirements including GLPs.

Concurrent  with  clinical  trials,  companies  usually  must  complete  some  long-term  preclinical  testing,  such  as  animal  studies  of  reproductive
adverse events and carcinogenicity and must also develop additional information about the chemistry and physical characteristics of the biological product
and  finalize  a  process  for  manufacturing  the  biological  product  in  commercial  quantities  in  accordance  with  CGMP  requirements.  The  manufacturing
process  must  be  capable  of  consistently  producing  quality  batches  of  the  biological  product  candidate  and,  among  other  things,  the  manufacturer  must
develop methods for testing the identity, strength, quality and purity of the final biological product. Additionally, appropriate packaging must be selected
and tested, and stability studies must be conducted, to demonstrate that the biological product candidate does not undergo unacceptable deterioration over
its shelf life.

The clinical trial sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available
clinical  data  or  literature  and  a  proposed  clinical  protocol,  to  the  FDA  as  part  of  an  IND.  Some  preclinical  testing  may  continue  even  after  the  IND  is
submitted. With gene therapy protocols, if the FDA allows the IND to proceed, but the RAC decides that full public review of the protocol is warranted, the
FDA will request at the completion of its

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IND review that sponsors delay initiation of the protocol until after completion of the RAC review process. The FDA also may impose clinical holds on a
biologic product candidate at any time before or during clinical trials due to safety concerns or non-compliance. If the FDA imposes a clinical hold, trials
may not recommence without FDA authorization and then only under terms authorized by the FDA. Accordingly, we cannot be sure that submission of an
IND for our future product candidates will result in the FDA allowing clinical studies to begin, or that, once begun, issues will not arise that suspend or
terminate such studies.

Human Clinical Trials Under an IND

Clinical  trials  involve  the  administration  of  the  biologic  product  candidate  to  healthy  volunteers  or  patients  under  the  supervision  of  qualified
investigators  who  generally  are  physicians  not  employed  by  or  under  the  control  of  the  trial  sponsor.  Clinical  trials  are  conducted  under  written  study
protocols detailing, among other things, the objectives of the clinical trial, dosing procedures, subject selection and exclusion criteria and the parameters to
be used to monitor subject safety, including stopping rules that assure a clinical trial will be stopped if certain adverse events should occur. Each protocol
and any amendments to the protocol must be submitted to the FDA as part of the IND. An IND becomes effective 30 days after receipt by the FDA, unless
before that time the FDA raises concerns or questions related to a proposed clinical trial and places the trial on clinical hold, including concerns that human
research subjects will be exposed to unreasonable health risks. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before
the clinical trial can begin. Accordingly, submission of an IND may or may not result in the FDA allowing clinical trials to commence.

Clinical  trials  must  be  conducted  and  monitored  in  accordance  with  the  FDA’s  regulations  comprising  GCP  requirements,  including  the
requirement  that  all  research  subjects  provide  informed  consent.  Further,  each  clinical  trial  must  be  reviewed  and  approved  by  an  IRB  and  IBC  at  or
servicing each institution at which the clinical trial will be conducted. An IRB is charged with protecting the welfare and rights of trial participants and
considers  items  such  as  whether  the  risks  to  individuals  participating  in  the  clinical  trials  are  minimized  and  are  reasonable  in  relation  to  anticipated
benefits. The IRB also approves the form and content of the informed consent that must be signed by each clinical trial subject, or their legal representative,
reviews  and  approves  the  study  protocol,  and  must  monitor  the  clinical  trial  until  completed.  Clinical  trials  involving  recombinant  DNA  also  must  be
reviewed by an IBC, a local institutional committee that reviews and oversees basic and clinical research that utilizes recombinant DNA at that institution.
The IBC assesses the safety of the research and identifies any potential risk to public health or the environment.

Human clinical trials typically are conducted in three sequential phases that may overlap or be combined:

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Phase 1. The biologic product candidate initially is introduced into a small number of healthy human subjects and tested for safety, dosage
tolerance, absorption, metabolism, distribution and excretion and, if possible, to gain an early understanding of its effectiveness. In the case
of  some  product  candidates  for  severe  or  life-threatening  diseases,  especially  when  the  product  candidate  may  be  too  inherently  toxic  to
ethically administer to healthy volunteers, the initial human testing is often conducted in patients. Phase 1 clinical trials of gene therapies are
typically conducted in patients rather than healthy volunteers.

Phase 2. The biologic product candidate is evaluated in a limited patient population to identify possible adverse effects and safety risks, to
preliminarily evaluate the efficacy of the product candidate for specific targeted diseases and to determine dosage tolerance, optimal dosage
and dosing schedule.

Phase 3. Phase 3 clinical trials are commonly referred to as “pivotal” studies, which typically denotes studies that present the data the FDA
or other relevant regulatory agencies will use to determine whether or not to approve a biologic product. In Phase 3 studies, the biologic
product  candidate  is  administered  to  an  expanded  patient  population,  generally  at  multiple  geographically  dispersed  clinical  trial  sites  in
adequate  and  well-controlled  clinical  trials  to  generate  sufficient  data  to  statistically  confirm  the  potency  and  safety  of  the  product  for
approval. These clinical trials are intended to establish the overall risk/benefit ratio of the product candidate and provide an adequate basis
for product labeling.

Post-approval clinical trials, sometimes referred to as Phase 4 clinical trials, may be conducted after marketing approval. These clinical trials
are used to gain additional experience from the treatment of patients in the intended therapeutic indication, particularly for long-term safety
follow-up.

During all phases of clinical development, regulatory agencies require extensive monitoring and auditing of all clinical activities, clinical data and

clinical trial investigators. Annual progress reports detailing the results of the clinical trials must be submitted to the FDA.

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Additional Regulation for Gene Therapy Clinical Trials

In addition to the regulations discussed above, there are a number of additional standards that apply to clinical trials involving the use of gene
therapy. The FDA has issued various guidance documents regarding gene therapies, which outline additional factors the FDA will consider at each of the
above stages of development and relate to, among other things: the proper preclinical assessment of gene therapies; the CMC information that should be
included in an IND application; the proper design of tests to measure product potency in support of an IND or BLA application; and measures to observe
delayed adverse effects in subjects who have been exposed to investigational gene therapies when the risk of such effects is high. Further, the FDA usually
recommends that sponsors observe subjects for potential gene therapy-related delayed adverse events for a 15-year period, including a minimum of five
years of annual examinations followed by 10 years of annual queries, either in person or by questionnaire. The NIH and the FDA have a publicly accessible
database, the Genetic Modification Clinical Research Information System, which includes information on gene therapy trials and serves as an electronic
tool to facilitate the reporting and analysis of adverse events on these trials.

U.S. Review and Approval Processes

The  results  of  the  preclinical  tests  and  clinical  trials,  together  with  detailed  information  relating  to  the  product’s  CMC  and  proposed  labeling,
among  other  things,  are  submitted  to  the  FDA  as  part  of  a  BLA  or  other  submission  requesting  authorization  to  market  the  product  for  one  or  more
indications. For gene therapies, selecting patients with applicable genetic defects is a necessary condition to effective treatment. For the therapy we are
currently  developing,  we  believe  that  diagnoses  based  on  existing  genetic  tests  developed  and  administered  by  laboratories  certified  under  the  Clinical
Laboratory Improvement Amendments (“CLIA”) are sufficient to select appropriate patients and will be permitted by the FDA. Under the PDUFA, each
BLA (or New Drug Application (“NDA”) for some biologics) must be accompanied by a significant user fee. The FDA adjusts the PDUFA user fees on an
annual  basis.  The  PDUFA  also  imposes  an  annual  product  fee  for  biologics  and  an  annual  establishment  license  fee  on  facilities  used  to  manufacture
prescription biologics. Fee waivers or reductions are available in certain circumstances, including a waiver of the application fee for the first application
filed by a small business. Additionally, no user fees are assessed on BLAs or NDAs for product candidates designated as orphan drugs, unless the product
candidate also includes a non-orphan indication.

The FDA reviews a BLA within 60 days of submission to determine if it is substantially complete before it accepts it for filing. The FDA may
refuse to file any BLA that it deems incomplete or not properly reviewable at the time of submission and may request additional information. In that event,
the BLA must be resubmitted with the additional information. The resubmitted application also is subject to review before the FDA accepts it for filing.
Once the submission is accepted for filing, the FDA begins an in-depth, substantive review of the BLA. The FDA reviews the BLA to determine, among
other things, whether the proposed product candidate is safe and potent, or effective, for its intended use, has an acceptable purity profile and whether the
product  candidate  is  being  manufactured  in  accordance  with  CGMP  to  assure  and  preserve  the  product  candidate’s  identity,  safety,  strength,  quality,
potency and purity. The FDA may refer applications for novel biologic products or biologic products that present difficult questions of safety or efficacy to
an  advisory  committee,  typically  a  panel  that  includes  clinicians  and  other  experts,  for  review,  evaluation  and  a  recommendation  as  to  whether  the
application should be approved and under what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such
recommendations  carefully  when  making  decisions.  During  the  product  approval  process,  the  FDA  also  will  determine  whether  a  REMS  program  is
necessary to assure the safe use of the product candidate.

REMS use risk minimization strategies beyond the professional labeling to ensure that the benefits of the product outweigh the potential risks. To
determine  whether  a  REMS  is  needed,  the  FDA  will  consider  the  size  of  the  population  likely  to  use  the  product,  seriousness  of  the  disease,  expected
benefit of the product, expected duration of treatment, seriousness of known or potential adverse events, and whether the product is a new molecular entity.
A REMS could include medication guides, physician communication plans and elements to assure safe use, such as restricted distribution methods, patient
registries and other risk minimization tools. If the FDA concludes a REMS is needed, the sponsor of the BLA must submit a proposed REMS; the FDA
will not approve the BLA without a REMS, if required.

Before  approving  a  BLA,  the  FDA  will  inspect  the  facilities  at  which  the  product  candidate  is  manufactured.  The  FDA  will  not  approve  the
product candidate unless it determines that the manufacturing processes and facilities are in compliance with CGMP requirements and adequate to assure
consistent production of the product candidate within required specifications. Additionally, before approving a BLA, the FDA typically will inspect one or
more clinical sites to assure that the clinical trials were conducted in compliance with IND trial requirements and GCP requirements.

On the basis of the BLA and accompanying information, including the results of the inspection of the manufacturing facilities, the FDA may issue
an  approval  letter  or  a  complete  response  letter.  An  approval  letter  or  license  authorizes  commercial  marketing  of  the  biologic  product  with  specific
prescribing  information  for  specific  indications.  A  complete  response  letter  generally  outlines  the  deficiencies  in  the  submission  and  may  require
substantial additional testing or

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information  in  order  for  the  FDA  to  reconsider  the  application.  If  and  when  those  deficiencies  have  been  addressed  to  the  FDA’s  satisfaction  in  a
resubmission of the BLA, the FDA will issue an approval letter.

If a product candidate receives regulatory approval, the approval may be significantly limited to specific diseases and dosages or the indications
for use may otherwise be limited. Further, the FDA may require that certain contraindications, warnings or precautions be included in the product labeling.
The FDA may impose restrictions and conditions on product distribution, prescribing or dispensing in the form of a REMS, or otherwise limit the scope of
any approval. In addition, the FDA may require post-marketing clinical trials, sometimes referred to as Phase 4 clinical trials, designed to further assess a
biologic  product’s  safety  and  effectiveness,  and  testing  and  surveillance  programs  to  monitor  the  safety  of  approved  products  that  have  been
commercialized.

The FDA has agreed to specified performance goals in the review of BLAs under the PDUFA. One such goal is to review standard BLAs in 10
months after the FDA accepts the BLA for filing, and priority BLAs in six months, whereupon a review decision is to be made. The FDA does not always
meet  its  PDUFA  goal  dates  for  standard  and  priority  BLAs  and  its  review  goals  are  subject  to  change  from  time  to  time.  The  review  process  and  the
PDUFA goal date may be extended by three months if the FDA requests or the BLA sponsor otherwise provides additional information or clarification
regarding information already provided in the submission within the last three months before the PDUFA goal date.

Fast Track Designation

Fast Track designation is granted to drugs being developed for the treatment of serious or life-threatening diseases or conditions where there is an
unmet medical need. The purpose of the Fast Track designation provision is to help facilitate development and expedite the review and potential approval
of  drugs  to  treat  serious  and  life-threatening  conditions.  Sponsors  of  drugs  that  receive  Fast  Track  designation  have  the  opportunity  for  more  frequent
interactions with the FDA review team throughout the development program. These can include meetings to discuss study design, data required to support
approval, or other aspects of the clinical program. Additionally, products that have been granted Fast Track designation may be eligible for priority review
of a BLA application and the FDA may consider reviewing portions of the submission before the sponsor submits the complete application, also known as
a rolling review.

Orphan Drug Designation

Under the Orphan Drug Act, the FDA may designate a biologic product as an “orphan drug” if it is intended to treat a rare disease or condition,
generally meaning that it affects fewer than 200,000 individuals in the United States, or more in cases in which there is no reasonable expectation that the
cost of developing and making a biologic product available in the United States for treatment of the disease or condition will be recovered from sales of the
product.

If  a  product  with  orphan  status  receives  the  first  FDA  approval  for  the  disease  or  condition  for  which  it  has  such  designation,  the  product  is
entitled to orphan product exclusivity, meaning that the FDA may not approve any other applications to market the same drug or biologic product for the
same indication for seven years, except in limited circumstances, such as a showing of clinical superiority to the product with orphan exclusivity or if the
party holding the exclusivity fails to assure the availability of sufficient quantities of the drug to meet the needs of patients with the disease or condition for
which the drug was designated. Competitors, however, may receive approval of different products for the same indication for which the orphan product has
exclusivity  or  obtain  approval  for  the  same  product  but  for  a  different  indication  for  which  the  orphan  product  has  exclusivity.  Other  benefits  include
reduced regulatory fees, protocol assistance and tax credits for certain clinical research costs.

Orphan medicinal product status in the European Union (“EU”) has similar, but not identical benefits.

Regenerative Medicine Advanced Therapy Designation

Established under the 21st Century Cures Act, RMAT designation is a program designed to expedite the development and approval of regenerative
medicine  products,  including  gene  therapy  products.  An  investigational  therapy  is  eligible  for  the  RMAT  designation  if  it  is  intended  to  treat,  modify,
reverse or cure a serious or life-threatening disease or condition, and preliminary clinical evidence indicates a potential to address unmet medical needs for
that disease or condition. The designation includes all the benefits of the FDA’s Fast Track and Breakthrough Therapy designations and enables the ability
to  work  more  closely  and  frequently  with  the  FDA  to  discuss  surrogate  or  intermediate  endpoints  to  support  the  potential  acceleration  of  approval  and
satisfy post-approval requirements.

Prime Designation

The  PRIME  designation  is  awarded  by  the  EMA  to  promising  medicines  that  target  an  unmet  medical  need.  These  medicines  are  considered
priority medicines by the EMA. To be eligible and accepted for PRIME, a medicine has to show its potential to benefit patients with unmet medical needs
based  on  early  clinical  data  coupled  with  non-clinical  data.  Through  PRIME,  the  EMA  offers  enhanced  support  to  medicine  developers  including  early
interaction and dialogue, and a pathway for

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accelerated evaluation by the agency. The program is intended to optimize development plans and expedite the review and approval process so that these
medicines may reach patients as early as possible.

Rare Pediatric Disease Priority Review Voucher

The FDA also offers a rare pediatric disease drug designation. If a drug receives the designation of a “rare pediatric disease” drug, it is eligible
during the FDA marketing process to apply for a Rare Pediatric Disease Priority Review Voucher. According to the FDA website, under the Rare Pediatric
Priority Review Voucher Program, a sponsor who receives an approval for a drug or biologic for a “rare pediatric disease” may qualify for a voucher that
can be redeemed to receive a priority review of a subsequent marketing application for a different product.

U.S. Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration and specifics of FDA approval of product candidates, some of a sponsor’s U.S. patents may be eligible for
limited  patent  term  extension  under  the  Drug  Price  Competition  and  Patent  Term  Restoration  Act  of  1984.  The  Hatch-Waxman  Amendments  permit  a
patent restoration term of up to five years as compensation for patent term lost during product development and 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  generally  is  one-half  the  time  between  the  effective  date  of  an  IND  and  the  submission  date  of  a  BLA  plus  the  time  between  the
submission date of a BLA and the approval of that application. Only one patent applicable to an approved biologic product is eligible for the extension and
the application for the extension must be submitted prior to the expiration of the patent. Moreover, a given patent may only be extended once based on a
single product. The United States Patent and Trademark Office (“USPTO”), in consultation with the FDA, reviews and approves the application for any
patent term extension or restoration.

Post-Approval Requirements

Rigorous  and  extensive  FDA  regulation  of  biologic  products  continues  after  approval,  particularly  with  respect  to  CGMP  requirements.
Manufacturers  are  required  to  comply  with  applicable  requirements  in  the  CGMP  regulations,  including  quality  control  and  quality  assurance  and
maintenance of records and documentation. Other post-approval requirements applicable to biologic products include reporting of CGMP deviations that
may  affect  the  identity,  potency,  purity  and  overall  safety  of  a  distributed  product;  recordkeeping  requirements;  reporting  of  adverse  effects;  reporting
updated safety and efficacy information; and complying with electronic record and signature requirements. After a BLA is approved, the product also may
be subject to official lot release. If the product is subject to official release by the FDA, the manufacturer submits samples of each lot of product to the
FDA, together with a release protocol, showing a summary of the history of manufacture of the lot and the results of all tests performed on the lot. The
FDA  also  may  perform  certain  confirmatory  tests  on  lots  of  some  products  before  releasing  the  lots  for  distribution.  In  addition,  the  FDA  conducts
laboratory research related to the regulatory standards on the safety, purity, potency and effectiveness of biologic products. A sponsor also must comply
with  the  FDA’s  advertising  and  promotion  requirements,  such  as  the  prohibition  on  promoting  products  for  uses  or  in-  patient  populations  that  are  not
described in the product’s approved labeling (known as “off-label promotion”).

Discovery of previously unknown problems or the failure to comply with the applicable regulatory requirements may result in restrictions on the
marketing  of  a  product  or  withdrawal  of  the  product  from  the  market  as  well  as  possible  civil  or  criminal  sanctions.  In  addition,  changes  to  the
manufacturing process or facility generally require prior FDA approval before being implemented and other types of changes to the approved product, such
as adding new indications and additional labeling claims, are also subject to further FDA review and approval.

Government Regulation Outside of the United States

In addition to regulations in the United States, sponsors are subject to a variety of regulations in other jurisdictions governing, among other things,
clinical  trials  and  any  commercial  sales  and  distribution  of  biologic  products.  Because  biologically  sourced  raw  materials  are  subject  to  unique
contamination risks, their use may be restricted in some countries.

Whether or not a sponsor obtains FDA approval for a product, a sponsor must obtain the requisite approvals from regulatory authorities in foreign
countries prior to the commencement of clinical trials or marketing of the product in those countries. Certain countries outside of the United States have a
similar process that requires the submission of a clinical trial application, much like the IND, prior to the commencement of human clinical trials. In the
EU, for example, a request for a Clinical Trial Authorization (“CTA”) must be submitted to the competent regulatory authorities and the competent Ethics
Committees in the EU Member States in which the clinical trial takes place, much like FDA and the IRB, respectively. Once the CTA request is approved
in accordance with the EU and the EU Member State’s requirements, clinical trial development may proceed. The requirements and processes governing
the conduct of clinical trials, product licensing, pricing and reimbursement vary from country to country. In all cases, the clinical trials are conducted in
accordance with GCPs and the applicable

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regulatory requirements of the country or countries in which the clinical trial is performed, as well as the ethical principles that have their origin in the
Declaration of Helsinki (whichever provides the greater protection to the clinical trial participants).

Failure to comply with applicable foreign regulatory requirements may result in, among other things, fines; suspension, variation or withdrawal of

regulatory approvals; product recalls; seizure of products; operating restrictions; and criminal prosecution.

Other Healthcare Laws and Regulations

Healthcare providers, physicians and third-party payors play a primary role in the recommendation and use of pharmaceutical products that are
granted marketing approval. Arrangements with third-party payors, existing or potential customers and referral sources are subject to broadly applicable
fraud  and  abuse  and  other  healthcare  laws  and  regulations,  and  these  laws  and  regulations  may  constrain  the  business  or  financial  arrangements  and
relationships  through  which  manufacturers  market,  sell  and  distribute  the  products  for  which  they  obtain  marketing  approval.  Such  restrictions  under
applicable federal and state healthcare laws and regulations include the following:

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the  federal  Anti-Kickback  Statute,  which  prohibits,  among  other  things,  persons  and  entities  from  knowingly  and  willfully  soliciting,
receiving,  offering  or  paying  remuneration,  directly  or  indirectly,  in  cash  or  kind,  in  exchange  for,  or  to  induce,  either  the  referral  of  an
individual for, or the purchase, order or recommendation of, any good or service for which payment may be made under federal healthcare
programs such as the Medicare and Medicaid programs. This statute has been interpreted to apply to arrangements between pharmaceutical
manufacturers,  on  the  one  hand,  and  prescribers,  purchasers  and  formulary  managers  on  the  other.  The  Patient  Protection  and  Affordable
Care Act (“PPACA”) amended the intent requirement of the federal Anti-Kickback Statute. A person or entity no longer needs to have actual
knowledge of this statute or specific intent to violate it in order to commit a violation;

the federal false claims and civil monetary penalties laws, including the civil False Claims Act (“FCA”), 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 payors that are false or fraudulent, or making a false statement to avoid, decrease, or conceal an obligation to pay money to the federal
government. Certain marketing practices, including off-label promotion, also may implicate the FCA. In addition, the PPACA codified case
law that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent
claim for purposes of the FCA;

the  federal  Physician  Payments  Sunshine  Act,  which  requires  certain  manufacturers  of  drugs,  devices,  biologics  and  medical  supplies  for
which  payment  is  available  under  Medicare,  Medicaid,  or  the  Children’s  Health  Insurance  Program,  with  specific  exceptions,  to  report
annually  to  the  Centers  for  Medicare  &  Medicaid  Services  (“CMS”)  information  related  to  payments  and  other  transfers  of  value  to
physicians, certain other healthcare providers and teaching hospitals, and ownership and investment interests held by physicians and other
healthcare providers and their immediate family members;

the federal Health Care Fraud statute imposes criminal and civil liability for executing a scheme to defraud any healthcare benefit program or
making false statements relating to healthcare matters;

the  Health  Insurance  Portability  and  Accountability  Act  of  1996  (“HIPAA”),  as  amended  by  the  Health  Information  Technology  for
Economic  and  Clinical  Health  Act,  and  its  implementing  regulations,  which  imposes  obligations,  including  mandatory  contractual  terms,
with respect to safeguarding the transmission, security and privacy of protected health information;

the  federal  false  statements  statute  prohibits  knowingly  and  willfully  falsifying,  concealing  or  covering  up  a  material  fact  or  making  any
materially false statement in connection with the delivery of or payment for federally sponsored healthcare benefits, items or services; and

state and foreign law equivalents of each of the above federal laws, such as anti-kickback and false claims laws which may apply to items or
services reimbursed by any third-party payor, including commercial insurers; state laws that require pharmaceutical companies to comply
with  the  pharmaceutical  industry’s  voluntary  compliance  guidelines  and  the  relevant  compliance  guidance  promulgated  by  the  federal
government  or  otherwise  restrict  payments  that  may  be  made  to  healthcare  providers  and  other  potential  referral  sources;  state  laws  that
require  drug  manufacturers  to  report  information  related  to  payments  and  other  transfers  of  value  to  physicians  and  other  healthcare
providers or marketing expenditures; and state laws governing the privacy and security of health information in certain circumstances, many
of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts.

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Violation  of  the  laws  described  above  or  any  other  governmental  laws  and  regulations  may  result  in  penalties,  including  civil  and  criminal
penalties,  damages,  fines,  the  curtailment  or  restructuring  of  operations,  the  exclusion  from  participation  in  federal  and  state  healthcare  programs,
disgorgement,  contractual  damages,  reputational  harm,  diminished  profits  and  future  earnings,  and  imprisonment.  Furthermore,  efforts  to  ensure  that
business activities and business arrangements comply with applicable healthcare laws and regulations can be costly.

Coverage and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any products for which we may obtain regulatory approval. In the
United  States,  sales  of  any  product  candidates  for  which  regulatory  approval  for  commercial  sale  is  obtained  will  depend  in  part  on  the  availability  of
coverage and adequate reimbursement from third-party payors. Third-party payors include government authorities and health programs in the United States
such as Medicare and Medicaid, managed care providers, private health insurers and other organizations. These third-party payors are increasingly reducing
reimbursements  for  medical  products  and  services.  We  may  need  to  conduct  expensive  pharmacoeconomic  studies  in  order  to  demonstrate  the  medical
necessity and cost-effectiveness of our products, in addition to incurring the costs required to obtain FDA approvals. 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 FDA-approved
drugs for a particular indication. Additionally, the containment of healthcare costs has become a priority of federal and state governments, and the prices of
drugs have been a focus in this effort. The U.S. government, state legislatures and foreign governments have shown significant interest in implementing
cost-containment  programs,  including  price  controls,  restrictions  on  reimbursement  and  requirements  for  substitution  of  generic  products.  Coverage
policies  and  third-party  reimbursement  rates  may  change  at  any  time.  Even  if  favorable  coverage  and  reimbursement  status  is  attained  for  one  or  more
products for which we receive regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future.

In the EU, pricing and reimbursement schemes vary widely from country to country. Some countries provide that products may be marketed only
after  a  reimbursement  price  has  been  agreed.  Some  countries  may  require  the  completion  of  additional  studies  that  compare  the  cost-effectiveness  of  a
particular product candidate to currently available therapies. EU member states may approve a specific price for a product or it may instead adopt a system
of direct or indirect controls on the profitability of the company placing the product on the market. Other member states allow companies to fix their own
prices for products, but monitor and control company profits. The downward pressure on health care costs has become intense. As a result, increasingly
high barriers are being erected to the entry of new products. In addition, in some countries, cross-border imports from low-priced markets exert competitive
pressure  that  may  reduce  pricing  within  a  country.  Any  country  that  has  price  controls  or  reimbursement  limitations  may  not  allow  favorable
reimbursement and pricing arrangements.

Health Reform

The United States and some foreign jurisdictions are considering or have enacted a number of reform proposals to change the healthcare system.
There  is  significant  interest  in  promoting  changes  in  healthcare  systems  with  the  stated  goals  of  containing  healthcare  costs,  improving  quality  or
expanding  access.  In  the  United  States,  for  example,  the  pharmaceutical  industry  has  been  a  particular  focus  of  these  efforts  and  has  been  significantly
affected and continues to face major uncertainty due to the status of major legislative initiatives surrounding healthcare reform. On August 16, 2022, the
Inflation  Reduction  Act  of  2022  (“IRA”)  was  signed  into  law.  The  IRA  includes  several  provisions  to  lower  prescription  drug  costs  for  people  with
Medicare and reduce drug spending by the federal government, including allowing Medicare to negotiate prices for certain prescription drugs, requiring
drug manufacturers to pay a rebate to the federal government if prices for single-source drugs and biologicals covered under Medicare Part B and nearly all
covered  drugs  under  Part  D  increase  faster  than  the  rate  of  inflation  (CPI-U),  and  limiting  out  of  pocket  spending  for  Medicare  Part  D  enrollees.
Additionally, On October 14, 2022, President Biden signed Executive Order 14087 on “Lowering Prescription Drug Costs for Americans.” The Executive
Order specifically requests that the Center for Medicare and Medicaid Innovation consider “models that may lead to lower cost sharing for commonly used
drugs and support value-based payment that supports high-quality care.”

Additional Regulation

In  addition  to  the  foregoing,  state  and  federal  laws  regarding  environmental  protection  and  hazardous  substances,  including  the  Occupational
Safety  and  Health  Act,  the  Resource  Conservation  and  Recovery  Act  and  the  Toxic  Substances  Control  Act,  affect  our  business.  These  and  other  laws
govern  the  use,  handling  and  disposal  of  various  biologic,  chemical  and  radioactive  substances  used  in,  and  wastes  generated  by,  operations.  If  our
operations result in contamination of the environment or expose individuals to hazardous substances, we could be liable for damages and governmental
fines. Equivalent laws have been adopted in other countries that impose similar obligations.

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U.S. Foreign Corrupt Practices Act

The  U.S.  Foreign  Corrupt  Practices  Act  (“FCPA”)  prohibits  U.S.  corporations  and  individuals  from  engaging  in  certain  activities  to  obtain  or
retain business abroad 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. The scope of the FCPA includes interactions with certain healthcare professionals in many countries.
Equivalent laws have been adopted in other foreign countries that impose similar obligations.

Human Capital

As  of  February  20,  2023,  we  had  210  full-time  employees,  primarily  engaged  in  research  and  development,  manufacturing,  administrative
activities,  and  activities  in  preparation  of  commercialization  of  B-VEC.  None  of  our  employees  are  represented  by  a  labor  union  and  we  consider  our
employee relations to be good.

We believe our employees are among the most important assets to our company and are key to achieving our goals and expectations. Our human
capital  resources  objectives  include,  as  applicable,  identifying,  recruiting,  retaining,  and  incentivizing  our  existing  and  new  employees.  We  offer  robust
compensation packages, including competitive base pay, incentive compensation and stock compensation programs, and provide a broad range of benefits.
The principal purpose of our stock compensation program is to attract, retain and reward personnel through the granting of stock-based awards, in order to
increase  stockholder  value  and  the  success  of  our  company  by  motivating  such  individuals  to  perform  to  the  best  of  their  abilities  and  achieve  our
objectives. In addition, we are committed to the professional advancement of our employees and offer various training programs and career development
opportunities.

Corporate Information

We  commenced  operations  in  April  2016.  In  March  2017,  we  converted  from  a  California  limited  liability  company  to  a  Delaware  C-
corporation, and changed our name from Krystal Biotech, LLC to Krystal Biotech, Inc. Our principal offices are located at 2100 Wharton Street, Suite 701,
Pittsburgh, PA 15203, and our telephone number is 412-586-5830. In June 2018, the Company incorporated an Australian subsidiary, for the purpose of
undertaking  preclinical  and  clinical  studies  in  Australia.  In  April  2019,  the  Company  incorporated  Jeune  Aesthetics,  Inc.  in  Delaware,  a  wholly-owned
subsidiary,  for  the  purpose  of  undertaking  preclinical  studies  for  aesthetic  skin  conditions.  In  January  2022,  August  2022  and  December  2022,  we
incorporated  subsidiaries  in  Switzerland,  Netherlands,  and  France,  respectively,  for  the  purpose  of  establishing  initial  operations  in  Europe  for  the
development and commercialization of Krystal’s pipeline. Our website address is www.krystalbio.com. Our website and the information contained on, or
that can be accessed through, the website will not be deemed to be incorporated by reference in, and are not considered part of, this Annual Report on Form
10-K. You should not rely on any such information in making your decision whether to purchase our common stock. Our Annual Report on Form 10-K,
Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed or furnished pursuant to Sections 13(a) and 15(d) of the
Securities Exchange Act of 1934, as amended, or the Exchange Act, are available free of charge on the investor relations section of our website as soon as
reasonably practicable after we electronically file such material with, or furnish it to the Securities and Exchange Commission, or the SEC. The SEC also
maintains a website that contains reports, proxy and information statements, and other information regarding the Company that we file electronically with
the SEC. The address of the website is http://www.sec.gov.

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Item 1A. Risk Factors.

Risks Related to Our Financial Position and Need for Additional Capital

We have incurred net losses since inception. We expect to incur losses for the foreseeable future and may never achieve or maintain profitability.

Since inception, we have incurred recurring losses and negative cash flows from operations and, at December 31, 2022, we had an accumulated
deficit of $280.8 million. Our ability to achieve profitability depends on our ability to successfully complete the development of, and obtain the regulatory
approvals necessary to commercialize our product candidates. We have devoted substantially all our efforts to date to research and development of our gene
therapy product candidates as well as to building out our infrastructure. We expect to continue to incur significant expenses and operating losses for the
foreseeable future. The net losses we incur may fluctuate significantly from quarter to quarter. We anticipate that our expenses will increase substantially if,
and as, we:

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continue our research and the clinical development of our product candidates, including our current clinical trials and planned future trials;

initiate clinical trials for certain of our product candidates and preclinical studies for any additional product candidates that we may pursue in
the future;

prepare for regulatory approvals for our product candidates in the United States, EU and in other key geographies;

continue  to  operate  our  in-house  commercial-scale  CGMP  manufacturing  facility,  ANCORIS,  and  complete  build  out  and  startup  of
operations at our second CGMP manufacturing facility, ASTRA;

manufacture material for clinical trials or potential commercial sales;

further develop our gene therapy product candidate portfolio;

further  establish  a  sales,  marketing  and  distribution  infrastructure  to  commercialize  any  product  candidate  for  which  we  may  obtain
marketing approval;

develop, maintain, expand and protect our intellectual property portfolio; and

acquire or in-license other product candidates and technologies,

To  become  and  remain  profitable,  we  must  develop  and  eventually  commercialize  one  or  more  product  candidates  with  significant  market
potential.  This  will  require  us  to  be  successful  in  a  range  of  challenging  activities,  including  completing  the  clinical  trials  for  our  product  candidates,
developing  and  validating  commercial  scale  manufacturing  processes,  obtaining  marketing  approval,  manufacturing,  marketing  and  selling  any  product
candidates for which we may obtain marketing approval and satisfying any post-marketing requirements. If we were required to discontinue development
of any of our product candidates, if any of our product candidates do not receive regulatory approval, if we do not obtain our targeted indications for our
product candidates or if any of our product candidates fails to achieve sufficient market acceptance for any indication, we could be delayed by many years
in our ability to achieve profitability, if ever, and would materially adversely affect our business prospects and financial condition. Moreover, if we decide
to leverage any success with any of our current product candidates to develop other product opportunities, we may not be successful in such efforts. In any
such event, our business will be materially adversely affected.

We  currently  have  several  product  candidates  in  the  clinical  trials  stages,  but  we  may  never  develop,  acquire  or  in-license  additional  product
candidates. We may never succeed in any or all these activities and, even if we do, we may never generate revenues that are significant or large enough to
achieve profitability. If we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to
become  and  remain  profitable  would  decrease  the  value  of  our  company  and  could  impair  our  ability  to  raise  capital,  maintain  our  research  and
development efforts, expand our business or continue our operations. A decline in the value of our company also could cause you to lose all or part of your
investment.

Because of the numerous risks and uncertainties associated with pharmaceutical product and biological development, we are unable to accurately
predict the timing or amount of increased expenses or when, or if, we will be able to achieve profitability. If we are required by the FDA, the EMA, or other
regulatory  authorities  to  perform  studies  in  addition  to  those  currently  expected,  or  if  there  are  any  delays  in  completing  our  clinical  trials  or  the
development  of  our  product  candidates,  our  expenses  could  increase  and  revenue  from  product  candidates  in  development  and  profitability  from
commercially available products could be further delayed.

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We may need to raise additional funding in order to receive approval for our product candidates. Such funding may not be available on acceptable
terms,  or  at  all.  Failure  to  obtain  this  necessary  capital  when  needed  may  force  us  to  delay,  limit  or  terminate  certain  of  our  product  development
efforts or other operations.

To complete the process of obtaining regulatory approval for our product candidates and to continue building the sales, marketing and distribution
infrastructure that we believe will be necessary to commercialize our product candidates, if approved, we may require substantial additional funding. In
addition,  if  we  obtain  marketing  approval  for  our  product  candidates,  we  expect  to  incur  significant  expenses  related  to  product  sales,  medical  affairs,
marketing, manufacturing and distribution. We anticipate that we may need additional funding to complete the development of our product candidates and
to commercialize any such approved products.

Our future capital requirements will depend on many factors, including:

the length of our open label study for B-VEC;

the progress, timing results and costs of our Phase 1/2 clinical trials for KB105;

the progress, timing, results and costs of our Phase 2 clinical trials for KB301;

the progress, timing, results and costs of our Phase 1 clinical trials for KB407;

the continued development and the filing of IND applications for KB104 and other product candidates;

the initiation, scope, progress, timing, costs and results of drug discovery, laboratory testing, manufacturing, preclinical studies and clinical
trials for any other product candidates that we may pursue in the future, if any;

the costs of building and maintaining our own commercial-scale CGMP manufacturing facilities;

the outcome, timing and costs of seeking regulatory approvals;

the costs associated with the manufacturing process development and evaluation of third-party manufacturers, if necessary;

the  costs  of  future  activities,  including  product  sales,  medical  affairs,  marketing,  manufacturing  and  distribution,  in  the  event  we  receive
marketing approval for any of our current and future product candidates;

the extent to which the costs of our product candidates, if approved, will be paid by health maintenance, managed care, pharmacy benefit and
similar healthcare management organizations, or will be reimbursed by government authorities, private health coverage insurers and other
third-party payors;

subject to receipt of marketing approval, if any, revenue received from commercial sale of our current and future product candidates;

the terms and timing of any future collaborations, licensing, consulting or other arrangements that we may establish;

the  amount  and  timing  of  any  payments  we  may  be  required  to  make,  or  that  we  may  receive,  in  connection  with  the  licensing,  filing,
prosecution,  maintenance,  defense  and  enforcement  of  any  patents  or  other  intellectual  property  rights,  including  milestone  and  royalty
payments and patent prosecution fees that we are obligated to pay pursuant to our license agreements, if any;

our current license agreements, if any, remaining in effect and our achievement of milestones under those agreements;

our ability to establish and maintain collaborations and licenses on favorable terms, if at all; and

the extent to which we acquire or in-license other product candidates and technologies.

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Identifying potential product candidates and conducting preclinical testing and clinical trials is a time-consuming, expensive and uncertain process
that takes years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve product sales for
our  product  candidates  in  development.  Furthermore,  even  if  we  obtain  approval  for  a  product  candidate,  we  may  not  be  able  to  successfully  generate
significant revenue from the sale of such product candidate. Accordingly, we may need to continue to rely on additional financing to achieve our business
objectives.  Any  additional  fundraising  efforts  may  divert  our  management  from  their  day-to-day  activities,  which  may  adversely  affect  our  ability  to
develop  and  commercialize  our  product  candidates.  Moreover,  the  terms  of  any  financing  may  adversely  affect  the  holdings  or  the  rights  of  our
stockholders and the issuance of additional securities, whether equity or debt, by us, 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 our stockholders. Existing stockholders may not agree with our
financing  plans  or  the  terms  of  such  financings.  Adequate  additional  financing  may  not  be  available  to  us  on  acceptable  terms,  or  at  all.  The  terms  of
additional

25

financing may be impacted by, among other things, general market conditions, the market’s perception of our product candidates and growth potential and
the market price per share of our common stock. See “Raising additional capital could cause the price of our common stock to decline and cause dilution to
our stockholders, restrict our operations or require us to relinquish rights.”

Our ability to use our net operating loss carryforwards and certain tax credit carryforwards may be subject to limitation.

We have U.S. federal and state net operating loss carryforwards, which are available to reduce future taxable income. Federal net operating loss
carryforwards  generated  2018  through  2021  will  be  limited  to  offset  80%  of  taxable  income  for  an  indefinite  period  of  time,  until  fully  utilized.  These
federal and state net operating loss carryforwards expire beginning in 2037. We also have federal and state research and development tax credits which may
be used to offset future tax liabilities and expire beginning in 2039 and 2032, respectively. We also have federal orphan drug tax credits which may be used
to offset future tax liabilities which expire beginning in 2038.

Under  Sections  382  and  383  of  the  Internal  Revenue  Code  of  1986,  as  amended,  changes  in  our  ownership  may  limit  the  amount  of  our  net
operating loss carryforwards and tax credit carryforwards that could be utilized annually to offset our future taxable income, if any. This limitation would
generally apply in the event of a cumulative change in ownership of our company of more than 50% within a three-year period. Any such limitation may
significantly reduce our ability to utilize our net operating loss carryforwards and tax credit carryforwards before they expire. Private placements and other
transactions that have occurred since our inception, as well as our initial public offering, may trigger such an ownership change pursuant to Sections 382
and  383.  Any  such  limitation,  whether  as  the  result  of  the  initial  public  offering,  prior  private  placements,  sales  of  our  common  stock  by  our  existing
stockholders or additional sales of our common stock by us, could have a material adverse effect on our results of operations in future years. Generally,
under current law, federal net operating losses generated after December 31, 2017 are not subject to expiration and may not be carried back to prior taxable
years. However, the Coronavirus Aid, Relief, and Economic Security Act, or CARES Act, suspended the 80% taxable income limitation for net operating
losses generated in 2018, 2019, and 2020 to the extent these losses are exhausted during the special five-year carryback period or during the 2018, 2019 or
2020 tax years. Additionally, as noted above, for taxable years beginning after December 31, 2020, the CARES Act provisions no longer apply and the
deductibility of such federal net operating losses is limited to 80% of our taxable income in any future taxable year.

Our limited operating history may make it difficult for you to evaluate the success of our business to date and to assess our future viability.

We commenced operations in 2016. Our efforts to date, with respect to the development of our product candidates have been limited to organizing
and staffing our company, business planning, raising capital, developing our vector platform and related technologies, identifying potential gene therapy
product candidates, and undertaking preclinical studies and clinical trials. We have not yet demonstrated an ability to obtain marketing approvals for any of
our products, manufacture a commercial-scale product or conduct sales and marketing activities necessary for successful commercialization. Consequently,
any predictions you make about our future success, performance or viability may not be as accurate as they could be if we had more experience developing
gene therapy products.

We expect our financial condition and operating results to continue to fluctuate from quarter to quarter and year to year due to a variety of factors,
many  of  which  are  beyond  our  control.  We  will  need  to  transition  from  a  company  with  a  research  and  development  focus  to  a  company  capable  of
undertaking  commercial  activities.  We  may  encounter  unforeseen  expenses,  difficulties,  complications  and  delays  and  may  not  be  successful  in  such  a
transition. Accordingly, you should not rely upon the results of any particular quarterly or annual period as indications of future operating performance.

Risks Related to Our Business

We are substantially dependent on the commercial success of B-VEC

To date, we have invested substantial efforts and financial resources in the research and development of our product candidates. Our near-term
prospects,  including  our  ability  to  develop  our  product  candidates  and  generate  revenue,  and  our  future  growth  is  substantially  dependent  on  the
commercial  success  of  B-VEC.  We  initiated  Phase  3  testing  of  B-VEC  in  July  of  2020  and  announced  positive  topline  results  in  November  2021.  We
submitted the BLA for B-VEC in June 2022, which was accepted by the FDA in August 2022 and granted priority review. The PDUFA target date is May
19, 2023, but we cannot be certain of how long it will take to successfully complete the regulatory approval process.

Any delay in obtaining FDA approval of the BLA for B-VEC would further delay commercialization and would adversely impact our ability to
generate revenue and further develop our other product candidates. If the BLA for B-VEC is not approved on a timely basis or at all, our business, financial
condition, results of operations and prospects would be adversely impacted. The successful development, regulatory approval and commercialization of B-
VEC will depend on a number of

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factors, including the risks identified in these “Risk Factors.” One or more of these factors, many of which are beyond our control, could cause significant
delays or an inability to successfully commercialize B-VEC. Accordingly, we cannot assure you that we will be able to generate revenue through the sale of
B-VEC.

The effect of the COVID-19 pandemic or similar public health crises on our operations and the operations of our third-party partners could cause a
disruption of the development efforts for our product candidates and adversely impact our business.

The COVID-19 pandemic has previously adversely affected our international business and could have a material adverse effect on our financial
condition and results of operations. Authorities have previously imposed, and businesses and individuals have implemented, numerous measures to try to
contain the virus or treat its impact, such as travel bans and restrictions, quarantines, shelter-in-place/stay-at-home and social distancing orders, shutdowns,
and vaccine requirements. These measures have impacted and may further impact our workforce and operations, the operations of our customers, and those
of our third-party partners.

The extent to which COVID-19 or similar public health crises impacts our operations or those of our third-party partners will depend on future
developments,  which  are  highly  uncertain  and  cannot  be  predicted  with  confidence,  including  the  duration  of  the  pandemic,  additional  or  modified
government actions, new information that will emerge concerning the severity and impact of COVID-19, including new strains, and the actions to contain
COVID-19 or address its impact in the short and long term, among others.

Timely initiation and completion of planned clinical trials is dependent upon the availability of, for example, clinical trial sites, researchers and

investigators, regulatory agency personnel, and materials, which may be adversely affected by global health matters, such as pandemics.

In  the  event  that  governmental  authorities  were  to  further  modify  or  implement  new  restrictions,  our  employees  conducting  research  and
development or manufacturing activities may not be able to access our laboratory or manufacturing spaces, and our core activities may be significantly
limited or curtailed, possibly for an extended period of time.

If  we  are  unable  to  advance  our  product  candidates  through  clinical  trials,  obtain  regulatory  approval  and  ultimately  commercialize  our

product candidates, or if we experience significant delays in doing so, our business will be materially harmed.

The development and commercialization of our product candidates are subject to many uncertainties, including the following:

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successful enrollment and completion of clinical trials;

positive results from our current and planned future clinical trials;

receipt of regulatory approvals from applicable regulatory authorities;

successful  development  of  our  internal  manufacturing  processes  on  an  ongoing  basis  and  maintenance  of  our  existing  arrangements  with
third-party manufacturers for clinical supply;

commercial launch of our product candidates, if and when approved, whether alone or in collaboration with others;

acceptance of our product candidates, if and when approved, by patients, the medical community and third-party payors;

If  we  fail  in  one  or  more  of  these  factors  in  a  timely  manner  or  at  all,  we  could  experience  significant  delays  or  an  inability  to  successfully
commercialize our product candidates, which would materially harm our business. If we do not receive regulatory approvals for our product candidates, our
business, financial condition, results of operations and prospects could be materially and adversely affected.

Our lead candidate, B-VEC, has not received regulatory approval, and if we obtain regulatory approval to commercialize B-VEC the approval may be
for a narrower indication than we seek.

We cannot commercialize a product candidate until the appropriate regulatory authorities have reviewed and approved the product candidate. In
June 2022, we filed a BLA with the FDA seeking approval of B-VEC for the treatment of patients with DEB with a request for six-month priority review.
In August 2022, the FDA accepted the BLA and granted priority review with a PDUFA target date of February 17, 2023. In January 2023, the FDA notified
us that based on manufacturing information submitted to the agency on December 20, 2022, in response to an information request, the PDUFA date had
been revised to May 19, 2023. Even though B-VEC met its safety and efficacy endpoints in clinical trials, the regulatory authorities may not complete their
review processes in a timely manner, or we may not be able to obtain regulatory approval.

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Additionally, we submitted a request for MAA with the EMA in November 2022 for B-VEC for the treatment of DEB in patients 6 months and
older. The Company was informed by the EMA in January 2023 to modify the PIP waiver request to include patients between birth and 6 months. The
Company is modifying the application so that the MAA procedure can officially start in the second half of 2023 with an approval expected in early 2024.

Regulatory  authorities  also  may  approve  a  product  candidate  for  more  limited  indications  than  requested  or  they  may  impose  significant
limitations in the form of narrow indications, warnings or a post-approval safety monitoring program. These regulatory authorities may require precautions
or contra-indications with respect to conditions of use or they may grant approval subject to the performance of costly post-marketing clinical trials. In
addition, regulatory authorities may not approve the labeling claims that are necessary or desirable for the successful commercialization of B-VEC. Any of
the foregoing scenarios could materially harm the commercial prospects for B-VEC and materially and adversely affect our business, financial condition,
results of operations and prospects.

B-VEC is based on a novel technology, which makes it difficult to predict the time and cost of obtaining regulatory approval.

The clinical trial requirements of the FDA, EMA and other 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 such product candidates. The
regulatory  approval  process  for  novel  product  candidates  such  as  ours  can  be  more  expensive  and  take  longer  than  for  other,  better  known  or  more
extensively studied product candidates. It is difficult to determine how long it will take or how much it will cost to obtain regulatory approvals for our
product candidates in either the United States or the European Union or how long it will take to commercialize our product candidates. Approvals by the
European Commission may not be indicative of what FDA may require for approval and approval by the FDA may not be indicative of what the European
Commission would require for approval.

Regulatory requirements and policy governing gene and cell therapy products have changed frequently and may continue to change in the future.
The FDA has established the Office of Tissues and Advanced Therapies within its CBER to consolidate the review of gene therapy and related products,
and has established the Cellular, Tissue and Gene Therapies Advisory Committee to advise CBER in its review. If we were to engage a National Institutes
of Health funded institution to conduct a clinical trial, that institution’s IBC as well as its IRB, would need to review the proposed clinical trial to assess the
safety  of  the  trial.  Similarly,  the  EMA  may  issue  new  guidelines  concerning  the  development  and  marketing  authorization  for  gene  therapy  medicinal
products and require that we comply with these new guidelines.

These regulatory review committees and advisory groups and the new guidelines they promulgate may lengthen the regulatory review process,
require  us  to  perform  additional  studies,  increase  our  development  costs,  lead  to  changes  in  regulatory  positions  and  interpretations,  delay  or  prevent
approval  and  commercialization  of  B-VEC  or  future  product  candidates  or  lead  to  significant  post-approval  limitations  or  restrictions.  These  additional
processes may result in a review and approval process that is longer than we otherwise would have expected. Delay or failure to obtain, or unexpected costs
in obtaining, the regulatory approval necessary to bring a potential product to market could decrease our ability to generate sufficient product revenue, and
our business, financial condition, results of operations and prospects would be materially and adversely affected.

Our products may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval, limit the commercial
potential or result in significant negative consequences following any potential marketing approval.

There have been several significant adverse side effects in gene therapy trials using other vectors in the past. Gene therapy is still a relatively new
approach  to  disease  treatment  and  additional  adverse  side  effects  could  develop.  There  also  is  the  potential  risk  of  delayed  adverse  events  following
exposure  to  gene  therapy  products  due  to  persistent  biologic  activity  of  the  genetic  material  or  other  components  of  products  used  to  carry  the  genetic
material.

In addition to side effects caused by the product candidate, the administration process or related procedures also can cause adverse side effects. If
any such adverse events occur, our clinical trials could be suspended or terminated. If in the future we are unable to demonstrate that such adverse events
were caused by the administration process or related procedures, the FDA, the European Commission, the EMA or other regulatory authorities could order
us  to  cease  further  development  of,  or  deny  approval  of,  our  products  for  any  or  all  targeted  indications.  Even  if  we  can  demonstrate  that  any  serious
adverse events are not product-related, such occurrences could affect patient recruitment or the ability of enrolled patients to complete the trial. Moreover,
if we elect, or are required, to delay, suspend or terminate any clinical trial of our products, the commercial prospects of such product candidate may be
harmed and our ability to generate product revenues from the product candidate may be delayed or eliminated. Any of these occurrences may harm our
ability to develop product candidates, and may harm our business, financial condition and prospects significantly.

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Additionally, if one of our product candidates receives marketing approval, the FDA could require us to adopt a post-approval safety monitoring
program to ensure that the benefits outweigh its risks, which may include, among other things, a medication guide outlining the risks of the product for
distribution to patients and a communication plan to health care practitioners. Furthermore, if we or others later identify undesirable side effects caused by
our product candidates, several potentially significant negative consequences could result, including:

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regulatory authorities may suspend or withdraw approvals of such product candidate;

regulatory authorities may require additional warnings on the label;

we may be required to change the way a product candidate is administered or conduct additional clinical trials;

we could be sued and held liable for harm caused to patients; and

our reputation may suffer.

Any of these events could prevent us from achieving or maintaining market acceptance of our product candidates and could significantly harm our

business, financial condition, results of operations and prospects.

We may encounter substantial delays in our clinical trials, or we may fail to demonstrate safety and efficacy to the satisfaction of applicable regulatory
authorities.

Before obtaining marketing approval from regulatory authorities for the sale of our product candidates, we must conduct extensive clinical trials to
demonstrate the safety and efficacy of the product candidate for its intended indications. Clinical trials are expensive, time consuming and uncertain as to
outcome. We cannot guarantee that any clinical trials will be conducted as planned or completed on schedule, if at all. A failure of one or more clinical
trials can occur at any stage of testing. Events that may prevent successful or timely completion of clinical development include:

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delays in reaching a consensus with regulatory authorities on trial design;

delays in opening sites and recruiting a sufficient number and diversity of suitable patients to participate in our clinical trials;

imposition of a clinical hold by regulatory authorities as a result of a serious adverse event or concerns with a class of product candidates, or
after an inspection of our clinical trial operations or trial sites;

delays in having patients complete participation in a trial or return for post-treatment follow-up;

occurrence of serious adverse events associated with the product candidate that are viewed to outweigh its potential benefits; or

changes in regulatory requirements and guidance that require amending or submitting new clinical protocols.

In addition, if we make manufacturing or formulation changes to our products, we may need to conduct additional studies to bridge our modified
product candidate to earlier versions. Clinical trial delays could also shorten any periods during which we may have the exclusive right to commercialize
our  products  or  allow  our  competitors  to  bring  products  to  market  before  we  do,  which  could  limit  our  potential  revenue  or  impair  our  ability  to
successfully  commercialize  our  products  and  may  harm  our  business,  financial  condition,  results  of  operations  and  prospects.  Any  delays,  setbacks  or
failures in our clinical trials could materially and adversely affect our business, financial condition, results of operations and prospects.

Additionally,  if  the  results  of  our  clinical  trials  are  inconclusive  or  if  there  are  safety  concerns  or  serious  adverse  events  associated  with  our

product candidates, we may:

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be delayed in obtaining marketing approval, if at all, or be required to conduct additional confirmatory safety and/or efficacy studies;

obtain approval for indications or patient populations that are not as broad as intended or desired;

obtain approval with labeling that includes significant use or distribution restrictions or safety warnings;

be subject to additional post-marketing testing requirements;

be required to perform additional clinical trials to support approval;

have regulatory authorities withdraw, or suspend, their approval of the product or impose restrictions on its distribution;

be subject to the addition of labeling statements, such as warnings or contraindications;

be sued; or

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experience damage to our reputation.

Our product development costs will also increase if we experience delays in testing or obtaining marketing approvals. We do not know whether

any of our preclinical studies or clinical trials will begin as planned, need to be restructured or be completed on schedule, if at all.

Further, we, the FDA or an IRB, may suspend our clinical trials at any time if it appears that we or our collaborators are failing to conduct a trial in
accordance with regulatory requirements, including the FDA’s current GCP regulations, that we are exposing participants to unacceptable health risks, or if
the  FDA  finds  deficiencies  in  our  IND  applications  or  the  conduct  of  these  trials.  Therefore,  we  cannot  predict  with  any  certainty  the  schedule  for
commencement  and  completion  of  future  clinical  trials.  If  we  experience  delays  in  the  commencement  or  completion  of  our  clinical  trials,  or  if  we
terminate a clinical trial prior to completion, the commercial prospects of our product candidates could be negatively impacted, and our ability to generate
revenues from our product candidates may be delayed.

Even if we obtain regulatory approval for a product candidate, our product candidates will remain subject to regulatory oversight. We will continue to
incur  costs  related  to  regulatory  compliance  and  are  subject  to  risks  related  to  non-compliance  with  or  changes  to  applicable  law  and  regulations,
which would cause our product candidates to lose approval.

Even  if  we  obtain  any  regulatory  approval  for  B-VEC,  our  lead  product  candidate,  or  other  future  product  candidates,  they  will  be  subject  to
ongoing  regulatory  requirements  for  manufacturing,  labeling,  packaging,  storage,  advertising,  promotion,  sampling,  record-keeping  and  submission  of
safety and other post-market information. Any regulatory approvals that we receive for our product candidates may also be subject to a post-approval safety
monitoring  program,  limitations  on  the  approved  indicated  uses  for  which  the  product  may  be  marketed  or  to  the  conditions  of  approval,  or  contain
requirements for potentially costly post-marketing testing, including Phase 4 clinical trials, and surveillance to monitor the quality, safety and efficacy of
the  product.  For  example,  the  holder  of  an  approved  BLA  is  obligated  to  monitor  and  report  adverse  events  and  any  failure  of  a  product  to  meet  the
specifications  in  the  BLA.  The  holder  of  an  approved  BLA  also  must  submit  new  or  supplemental  applications  and  obtain  FDA  approval  for  certain
changes to the approved product, product labeling or manufacturing process. Advertising and promotional materials must comply with FDA rules and are
subject to FDA review, in addition to other potentially applicable federal and state laws.

In addition, product manufacturers and their facilities are subject to payment of user fees and continual review and periodic inspections by the
FDA  and  other  regulatory  authorities  for  compliance  with  CGMP  requirements  and  adherence  to  commitments  made  in  the  BLA  or  foreign  marketing
application. If we, or a regulatory authority, discover previously unknown problems with a product, such as adverse events of unanticipated severity or
frequency, or problems with the facility where the product is manufactured or a regulatory authority disagrees with the promotion, marketing or labeling of
that  product,  a  regulatory  authority  may  impose  restrictions  relative  to  that  product,  the  manufacturing  facility  or  us,  including  requiring  recall  or
withdrawal of the product from the market or suspension of manufacturing.

If we fail to comply with applicable regulatory requirements, a regulatory authority may:

issue a warning letter asserting that we are in violation of the law;

seek an injunction or impose administrative, civil or criminal penalties or monetary fines;

suspend or withdraw regulatory approval;

suspend any ongoing clinical trials;

refuse to approve a pending BLA or comparable foreign marketing application (or any supplements thereto) submitted by us or our strategic
partners, if any;

restrict the marketing or manufacturing of the product;

seize or detain the product or otherwise require the withdrawal of the product from the market;

refuse to permit the import or export of product candidates; or

refuse to allow us to enter into supply contracts, including government contracts.

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Any  government  investigation  of  alleged  violations  of  law  could  require  us  to  expend  significant  time  and  resources  in  response  and  could
generate negative publicity. The occurrence of any event or penalty described above may inhibit our ability to commercialize our product candidates and
adversely affect our business, financial condition, results of operations and prospects.

The FDA’s policies, and those of equivalent foreign regulatory agencies, may change and additional government regulations may be enacted that
could prevent, limit or delay regulatory approval of product candidates. We cannot predict the likelihood, nature or extent of government regulation that
may arise from future legislation or administrative action, either in

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the United States or abroad. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we
are  not  able  to  maintain  regulatory  compliance,  we  may  lose  any  marketing  approval  that  we  may  have  obtained  and  we  may  not  achieve  or  sustain
profitability, which would materially and adversely affect our business, financial condition, results of operations and prospects.

While we have obtained orphan drug designation for B-VEC, KB105, and KB407, it may not effectively protect us from competition, and we may be
unable to obtain orphan drug designation for our future product candidates. If our competitors are able to obtain orphan drug exclusivity for products
that  constitute  the  same  drug  and  treat  the  same  indications  as  our  product  candidates  before  us,  we  may  not  be  able  to  have  competing  products
approved by the applicable regulatory authority for a significant period of time.

On November 2, 2017, the FDA granted orphan drug designation to our lead product candidate, B-VEC, for the treatment of DEB. On April 16,
2018, the European Commission granted the Orphan Medicinal Product Designation (“OMPD”), for B-VEC. On August 7, 2018, the FDA granted orphan
drug designation to our product candidate, KB105, currently in clinical development for treatment of patients with TGM1-ARCI, and on October 10, 2019,
the  European  Commission  granted  the  OMPD  for  KB105.  On  August  17,  2020,  the  FDA  granted  orphan  drug  designation  to  our  product  candidate,
KB407, currently in clinical development, for the treatment of cystic fibrosis, and on January 13, 2023, the European Commission granted the OMPD for
KB407. Regulatory authorities in some jurisdictions, including the United States and the EU, may designate drugs for relatively small patient populations
as orphan drugs. Under the Orphan Drug Act of 1983, the FDA may designate a product candidate as an orphan drug if it is intended to treat a rare disease
or  condition,  which  is  generally  defined  as  having  a  patient  population  of  fewer  than  200,000  individuals  in  the  United  States,  or  a  patient  population
greater than 200,000 in the United States where there is no reasonable expectation that the cost of developing the drug will be recovered from sales in the
United States. In the EU, the European Commission, upon a recommendation from the EMA’s Committee for Orphan Medicinal Products, grants orphan
drug designation to promote the development of products that are intended for the diagnosis, prevention or treatment of a life-threatening or chronically
debilitating  condition  affecting  not  more  than  5  in  10,000  persons  in  the  EU.  Additionally,  orphan  designation  is  granted  for  products  intended  for  the
diagnosis, prevention or treatment of a life-threatening, seriously debilitating or serious and chronic condition and 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 drug or biologic product.

Generally, if a product candidate with an orphan drug designation receives the first marketing approval for the indication for which it has such
designation,  the  product  is  entitled  to  a  period  of  marketing  exclusivity,  which  precludes  the  FDA  or  the  EMA  from  approving  another  marketing
application for a product that constitutes the same drug treating the same indication for that marketing exclusivity period, except in limited circumstances.
If  another  sponsor  receives  such  approval  before  we  do  (regardless  of  our  orphan  drug  designation),  we  will  be  precluded  from  receiving  marketing
approval  for  our  product  for  the  applicable  exclusivity  period.  The  applicable  period  is  seven  years  in  the  United  States  and  10  years  in  the  EU.  The
exclusivity period in the EU can be reduced to six years if a product no longer meets the criteria for orphan drug designation or if the product is sufficiently
profitable so that market exclusivity is no longer justified. Orphan drug exclusivity may be revoked if any regulatory agency determines that the request for
designation was materially defective or if the manufacturer is unable to assure sufficient quantity of the product to meet the needs of patients with the rare
disease or condition.

Even though we have obtained orphan drug exclusivity for B-VEC, KB105 and KB407, that exclusivity may not effectively protect the product
candidate from competition because different drugs can be approved for the same condition. In the United States, even after an orphan drug is approved,
the  FDA  may  subsequently  approve  another  drug  for  the  same  condition  if  the  FDA  concludes  that  the  latter  drug  is  not  the  same  drug  or  is  clinically
superior in that it is shown to be safer, more effective or makes a major contribution to patient care. In the EU, marketing authorization may be granted to a
similar medicinal product for the same orphan indication if:

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the second applicant can establish in its application that its medicinal product, although like the orphan medicinal product already authorized,
is safer, more effective or otherwise clinically superior;

the  holder  of  the  marketing  authorization  for  the  original  orphan  medicinal  product  consents  to  a  second  orphan  medicinal  product
application; or

the  holder  of  the  marketing  authorization  for  the  original  orphan  medicinal  product  cannot  supply  enough  quantities  of  orphan  medicinal
product.

Breakthrough  therapy  designation,  Regenerative  Medicine  Advanced  Therapy  designation,  Fast  Track  designation  or  Rare  Pediatric  Disease
designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development, regulatory review or approval process,
and it does not increase the likelihood that any of our product candidates will receive marketing approval in the United States.

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The FDA granted Fast Track designation in the United States for B-VEC and for KB105. In addition, B-VEC was granted RMAT by the FDA and
PRIME by the EMA. The receipt of any of these designations for a product candidate may not result in a faster development process, review or approval
compared to products considered for approval under conventional FDA and EMA procedures and does not assure ultimate approval by either the FDA or
EMA.

A RMAT/PRIME therapy product candidate is defined as a product candidate that is intended, alone or in combination with one or more other
drugs, to treat a serious or life-threatening disease. Drugs designated as RMAT therapies by the FDA are eligible for accelerated approval and increased
interaction and communication with the FDA designed to expedite the development and review process. If a drug, or biologic in our case, is intended for
the treatment of a serious or life-threatening condition and the biologic demonstrates the potential to address unmet medical needs for this condition, the
biologic  sponsor  may  apply  for  FDA  Fast  Track  designation.  Even  after  having  received  Fast  Track  designation,  we  may  not  experience  a  faster
development  process,  review  or  approval  compared  to  conventional  FDA  procedures.  In  addition,  the  FDA  may  withdraw  Fast  Track  designation  if  it
believes  that  the  designation  is  no  longer  supported  by  data  from  our  clinical  development  program.  Many  biologics  that  have  received  Fast  Track
designation  have  failed  to  obtain  approval.  A  sponsor  who  receives  an  approval  for  a  drug  or  biologic  for  a  “rare  pediatric  disease”  may  qualify  for  a
voucher that can be redeemed to receive a priority review of a subsequent marketing application for a different product. We received the designation of
“rare pediatric disease” for B-VEC, KB105, KB104, and for KB407, which could qualify us to receive a Rare Pediatric Priority Review Voucher.

There is no assurance we will receive RMAT, PRIME or breakthrough therapy or Fast Track designations for any of our other product candidates
and the receipt of any of these designations for a product candidate may not result in a faster development process, review or approval and does not assure
ultimate approval by the FDA. Further, even though we have received rare pediatric disease designation for B-VEC, KB105, KB104, and KB407, we may
not experience a faster review or approval for a subsequent marketing application.

We may expend our limited resources to pursue a product candidate or indication to the exclusion of other product candidates or indications that may
be more profitable or for which there is a greater likelihood of success.

We have limited financial and managerial resources. As a result, we may forego or delay pursuit of opportunities with product candidates or for
other indications that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to timely capitalize on viable
commercial products or profitable market opportunities. Our spending on current and future research and development programs and product candidates for
specific  indications  may  not  yield  any  commercially  viable  products.  If  we  do  not  accurately  evaluate  the  commercial  potential  or  target  market  for  a
particular product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing or other royalty arrangements in
cases in which it would have been more advantageous for us to retain sole development and commercialization rights to such product candidate.

If we are not successful in discovering, developing and commercializing additional product candidates, our ability to expand our business and achieve
our strategic objectives would be impaired.

Although a substantial amount of our efforts focuses on the potential approval of B-VEC, KB105, KB301, KB104 and KB407, a key component
our  strategy  is  to  discover,  develop  and  potentially  commercialize  a  portfolio  of  product  candidates  to  treat  orphan  diseases  and  ultimately,  non-orphan
diseases. Identifying new product candidates requires substantial technical, financial and human resources, whether any product candidates are ultimately
identified.  Even  if  we  identify  product  candidates  that  initially  show  promise,  we  may  fail  to  successfully  develop  and  commercialize  such  product
candidates for many reasons, including the following:

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the research methodology used may not be successful in identifying potential product candidates;

competitors may develop alternatives that render our product candidates obsolete;

product candidates we develop may be covered by third parties’ patents or other exclusive rights;

a  product  candidate  may,  on  further  study,  be  shown  to  have  harmful  side  effects  or  other  characteristics  that  indicate  it  is  unlikely  to  be
effective or otherwise does not meet applicable regulatory criteria;

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 patients, the medical community or third-party payors.

If we are unsuccessful in identifying and developing additional product candidates, our potential for growth may be impaired.

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We  face  significant  competition  in  an  environment  of  rapid  technological  change  and  the  possibility  that  our  competitors  may  achieve  regulatory
approval  before  us  or  develop  therapies  that  are  more  advanced  or  effective  than  ours,  which  may  adversely  affect  our  financial  condition  and  our
ability to successfully commercialize and market our product candidates.

We are aware of several companies and institutions that are currently developing alternative autologous or palliative gene therapy approaches for
DEB and cystic fibrosis. Many of our potential competitors, alone or with their strategic partners, have substantially greater financial, technical and other
resources, such as larger research and development, clinical, marketing and manufacturing organizations. Mergers and acquisitions in the biotechnology
and  pharmaceutical  industries  may  result  in  even  more  resources  being  concentrated  among  a  smaller  number  of  competitors.  Our  commercial
opportunities could be reduced or eliminated if competitors develop and commercialize products that are safer, more effective, have fewer or less severe
side  effects,  are  more  convenient  or  are  less  expensive  than  any  product  candidate  that  we  may  develop.  Competitors  also  may  obtain  FDA  or  other
regulatory approval for their products more rapidly or earlier than we may obtain approval for ours, which could result in our competitors establishing a
strong market position before we are able to enter the market. Additionally, technologies developed by our competitors may render B-VEC or any future
product candidate uneconomical or obsolete, and we may not be successful in marketing B-VEC or any future product candidate against competitors.

In  the  future,  even  if  we  commercialize  a  product  candidate  faster  than  our  competitors,  we  could  also  face  competition  from  lower  cost

biosimilars in the United States or in Europe.

In addition, as a result of the expiration or successful challenge of our patent rights, we could face litigation with respect to the validity and/or
scope of patents relating to our competitors’ products. The availability of our competitors’ products could limit the demand, and the price we are able to
charge, for any product candidate that we may develop and commercialize.

If any product liability lawsuits are successfully brought against us, we may incur substantial liabilities and may be required to limit commercialization
of our products or product candidates.

We  face  an  inherent  risk  of  product  liability  lawsuits  related  to  the  sale  of  our  products  to,  use  of  our  products  by,  and  testing  of  our  product
candidates. Product liability claims may be brought against us by participants enrolled in our clinical trials, patients, health care providers or others using,
or administering any of our approved products. If we cannot successfully defend ourselves against any such claims, we may incur substantial liabilities.
Regardless of their merit or eventual outcome, liability claims may result in:

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decreased demand for our approved products;

injury to our reputation;

withdrawal of clinical trial participants;

termination of clinical trial sites or entire trial programs;

increased regulatory scrutiny;

significant litigation costs;

substantial monetary awards to or costly settlement with patients or other claimants;

product recalls for approved products or a change in the indications for which they may be used;

loss of revenue;

diversion of management and scientific resources from our business operations; and

the inability to commercialize our product candidates.

With respect to any of our product candidates that are approved for commercial sale, we are, and will be, highly dependent upon physician and
patient perceptions of us and the safety and quality of our products. We could be adversely affected if we are subject to negative publicity. We could also be
adversely  affected  if  any  of  our  products  or  any  similar  products  distributed  by  other  companies  prove  to  be,  or  are  asserted  to  be,  harmful  to  patients.
Because of our dependence upon consumer perceptions, any adverse publicity could have a material adverse impact on our financial condition or results of
operations.

Our product liability insurance coverage may not be adequate to cover all liabilities that we may incur. We may need to increase our insurance
coverage when we begin the commercialization of our product candidates. Insurance coverage is becoming increasingly expensive. As a result, we may be
unable to maintain or obtain sufficient insurance at a reasonable cost to protect us against losses that could have a material adverse effect on our business. A
successful product liability claim or

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series of claims brought against us, particularly if judgments exceed any insurance coverage we may have, could decrease our cash resources and adversely
affect our business, financial condition and results of operations.

Risks Related to Manufacturing

Delays  in  obtaining  regulatory  approvals  of  the  process  and  facilities  needed  to  manufacture  our  product  candidates  or  disruptions  in  our
manufacturing process may delay or disrupt our product development and commercialization efforts.

Before we can begin to commercially manufacture our product candidates, we must pass a pre-approval inspection of our manufacturing facilities
by the FDA. A manufacturing authorization must also be obtained from the appropriate EU regulatory authorities. The timeframe required for us to obtain
such  approvals  is  uncertain.  To  obtain  approval,  we  will  need  to  ensure  that  all  our  processes,  methods  and  equipment  are  compliant  with  CGMP,  and
perform  extensive  audits  of  vendors,  contract  laboratories  and  suppliers.  If  any  of  our  vendors,  contract  laboratories  or  suppliers  is  found  to  be  out  of
compliance with CGMP, we may experience delays or disruptions in manufacturing while we work with these third parties to remedy the violation or while
we  work  to  identify  suitable  replacement  vendors.  The  CGMP  requirements  govern  quality  control  of  the  manufacturing  process  and  documentation
policies and procedures. In complying with CGMP, we will be obligated to expend time, money and effort in production, record keeping and quality control
to assure that the product meets applicable specifications and other requirements. If we fail to comply with these requirements, we would be subject to
possible regulatory action and may not be permitted to sell any product candidate that we may develop.

In addition, the manufacturing process used to produce our product candidates is complex, novel and has not been validated for commercial use.
In order to produce enough quantities of our product candidates for future clinical trials and initial U.S. commercial demand, we will need to increase the
scale of our manufacturing process. The production of our product candidates requires processing steps that are more complex than those required for most
chemical pharmaceuticals. Moreover, unlike chemical pharmaceuticals, the physical and chemical properties of a biologic such as ours generally cannot be
fully  characterized.  As  a  result,  assays  of  the  finished  product  may  not  be  sufficient  to  ensure  that  the  product  will  perform  in  the  intended  manner.
Accordingly, we employ multiple steps to control our manufacturing process to assure that the process works and that our product candidates are 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,  product  recalls,  product  liability  claims  or  insufficient  inventory.  We  may
encounter  problems  achieving  adequate  quantities  and  quality  of  clinical-grade  materials  that  meet  FDA,  EMA  or  other  applicable  standards  or
specifications with consistent and acceptable production yields and costs.

Although we have established our own manufacturing facilities for our product candidates, we may also utilize third parties to conduct our product
manufacturing. Therefore, we are subject to the risk that these third parties may not perform satisfactorily.

Even if we obtain the validation from the FDA of our CGMP manufacturing facilities, we may maintain third-party manufacturing capabilities in
order to provide multiple sources of supply. We utilize a third-party for manufacturing of the sterile gel that is mixed with our in-house produced vector. In
the event that these third-party manufacturers do not successfully carry out their contractual duties, meet expected deadlines or manufacture in accordance
with regulatory requirements or if there are disagreements between us and these third-party manufacturers, we may not be able to manufacture our products
for commercial or regulatory purposes. In such instances, we may need to locate an appropriate replacement third-party relationship, which may not be
readily available or on acceptable terms, which would cause additional delay or increased expense and would thereby have a material adverse effect on our
business, financial condition, results of operations and prospects.

If  we  or  a  third-party  manufacturer  fails  to  comply  with  applicable  CGMP  regulations,  the  FDA  and  foreign  regulatory  authorities  can  impose
regulatory sanctions including, among other things, refusal to approve a pending application for a new product candidate or suspension or revocation of a
pre-existing approval. Such an occurrence may cause our business, financial condition, results of operations and prospects to be materially harmed.

Any contamination in our manufacturing process, shortages of raw materials or failure of any of our key suppliers to deliver necessary components
could result in delays in our clinical development or marketing schedules.

Given the nature of biologics manufacturing, there is a risk of contamination. Any contamination could materially adversely affect our ability to

produce our product candidates on schedule and could, therefore, harm our results of operations and cause reputational damage.

Some of the raw materials required in our manufacturing process are derived from biologic sources. Such raw materials are difficult to procure and
may  be  subject  to  contamination  or  recall.  A  material  shortage,  contamination,  recall  or  restriction  on  the  use  of  biologically  derived  substances  in  the
manufacture of our product candidates could adversely impact or

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disrupt the commercial manufacturing or the production of clinical material, which could materially and adversely affect our development timelines and
our business, financial condition, results of operations and prospects.

Risks Related to Commercialization of Our Product Candidates

If we are unable to expand our market development capabilities or enter into agreements with third parties to market and sell our product candidates,
we may be unable to generate any product revenue.

To successfully commercialize B-VEC, and any other approved product candidates, we have expanded our capabilities to promote market access
and  build  awareness.  To  successfully  commercialize  any  products  that  may  result  from  our  development  programs,  we  will  need  to  further  expand  our
market development organization, either on our own or with a third-party. The development of our own market development team is expensive and time-
consuming and could delay any product launch. Moreover, we cannot be certain that we will be able to successfully develop this capability. We may enter
into collaboration agreements regarding any of our product candidates with third parties to utilize their established marketing and distribution capabilities,
but  we  may  be  unable  to  enter  into  such  agreements  on  favorable  terms,  if  at  all.  If  any  future  collaborators  do  not  commit  sufficient  resources  to
commercialize our products, or we are unable to develop the necessary capabilities on our own, we will be unable to generate sufficient product revenue to
sustain our business. We compete with many companies that currently have extensive, experienced and well-funded medical affairs, marketing and sales
operations to recruit, hire, train and retain marketing and sales personnel. We also face competition in our search for third parties to assist us with the sales
and marketing efforts of our product candidates. Without an internal team or the support of a third-party to perform marketing and sales functions, we may
be unable to compete successfully against these more established companies.

Our efforts to educate the medical community and third-party payors on the benefits of our product candidates may require significant resources
and may never be successful. Such efforts may require more resources than are typically required due to the complexity and uniqueness of our products. If
any of our product candidates is approved but fails to achieve market acceptance among physicians, patients or third-party payors, we will not be able to
generate significant revenues from such product, which could have a material adverse effect on our business, financial condition, results of operations and
prospects.

Negative public opinion and increased regulatory scrutiny of gene therapy may damage public perception of the safety of our gene therapy product
candidates and adversely affect our ability to conduct our business or obtain regulatory approvals for our product candidates.

Gene therapy remains a novel technology. Ethical, social and legal concerns about gene therapy could result in additional regulations restricting or
prohibiting  our  product  candidates.  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.  In  particular,  our  success  will  depend  upon  physicians  who  specialize  in  the  treatment  of  genetic
diseases  targeted  by  our  product  candidates  prescribing  treatments  that  involve  the  use  of  our  product  candidates  in  lieu  of,  or  in  addition  to,  existing
treatments with which they are familiar and for which greater clinical data may be available. More restrictive government regulations or negative public
opinion would have an adverse effect on our business, financial condition, results of operations and prospects and may delay or impair the development and
commercialization  of  our  product  candidates  or  demand  for  any  products  we  may  develop.  For  example,  earlier  gene  therapy  trials  led  to  several  well-
publicized adverse events, including cases of leukemia and death seen in trials using other vectors. Serious adverse events in our clinical trials, or other
clinical trials involving gene therapy products or 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  product  candidates,  stricter  labeling  requirements  for  those  product  candidates  that  are  approved  and  a  decrease  in  demand  for  any  such  product
candidates.

If the market opportunities for our product candidates are smaller than we believe they are, our product revenues may be adversely impacted, and our
business may suffer.

We  have  mainly  focused  our  research  and  product  development  efforts  to  date  on  B-VEC  for  DEB.  Our  understanding  of  both  the  number  of
people who have this disease, as well as the subset of people with this disease who have the potential to benefit from treatment with B-VEC, are based on
estimates  in  published  literature.  These  estimates  may  prove  to  be  incorrect  and  new  studies  may  reduce  the  estimated  incidence  or  prevalence  of  this
disease. The number of patients in the United States, the EU and elsewhere may turn out to be lower than expected or these patients may not be otherwise
amenable to treatment with B-VEC or may become increasingly difficult to identify and access, all of which would adversely affect our business, financial
condition, results of operations and prospects.

Further,  there  are  several  factors  that  could  contribute  to  making  the  actual  number  of  patients  who  receive  B-VEC  less  than  the  potentially
addressable market. These include the lack of widespread availability of, and limited reimbursement for, new therapies in many underdeveloped markets.
Further, the severity of the progression of a disease up to the time of treatment

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will likely diminish the therapeutic benefit conferred by a gene therapy due to irreversible cell damage. Lastly, certain patients’ immune systems might
prohibit the successful delivery of certain gene therapy products to the target tissue, thereby limiting the treatment outcomes.

The commercial success of our product candidates will depend upon their degree of market acceptance by physicians, patients, third-party payors and
others in the medical community.

Even  with  the  requisite  approvals  from  the  FDA  in  the  United  States,  the  EMA  in  the  EU  and  other  regulatory  authorities  internationally,  the
commercial  success  of  our  product  candidates  will  depend,  in  part,  on  the  acceptance  of  physicians,  patients  and  health  care  payors  of  gene  therapy
products in general, and our product candidates, in particular, as medically necessary, cost-effective and safe. Any product that we commercialize may not
gain  acceptance  by  physicians,  patients,  health  care  payors  and  others  in  the  medical  community.  If  these  products  do  not  achieve  an  adequate  level  of
acceptance, we may not generate significant product revenue and may not become profitable. The degree of market acceptance of gene therapy products
and our product candidates, if approved for commercial sale, will depend on several factors, including:

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the efficacy and safety of our product candidates as demonstrated in clinical trials;

the efficacy, potential and perceived advantages of our product candidates over alternative treatments, if available;

the cost of our product candidates relative to alternative treatments, if any are available;

the clinical indications for which our product candidates are approved by the FDA or the EMA;

the willingness of physicians to prescribe new therapies;

the willingness of the target patient population to try new therapies;

the prevalence and severity of any side effects;

product labeling or product insert requirements of the FDA, the EMA or other regulatory authorities, including any limitations or warnings
contained in a product’s approved labeling;

relative convenience and ease of administration;

the strength of marketing and distribution support;

the timing of market introduction of competitive products;

the availability of products and their ability to meet market demand;

publicity concerning our product candidates or competing products and treatments;

any restrictions on the use of our products together with other medications; and

favorable third-party payor coverage and adequate reimbursement.

Even  if  a  potential  product  displays  a  favorable  efficacy  and  safety  profile  in  preclinical  studies  and  clinical  trials,  market  acceptance  of  the

product will not be fully known until after it is launched.

Government price controls or other changes in pricing regulation could restrict the amount that we are able to charge for our product candidates, if
approved, which would adversely affect our revenue and results of operations.

We expect that coverage and reimbursement of pharmaceuticals may be increasingly restricted both in the U.S. and internationally. The escalating
cost of health care has led to increased pressure on the health care industry to reduce costs. Drug pricing by pharmaceutical companies recently has come
under  increased  scrutiny  and  continues  to  be  subject  to  intense  political  and  public  debate  in  the  U.S.  and  abroad.  Government  and  private  third-party
payors have proposed health care reforms and cost reductions. A number of federal and state proposals to control the cost of health care, including the cost
of drug treatments, have been made in the U.S. Specifically, there have been several recent U.S. Congressional inquiries and proposed bills designed to,
among  other  things,  bring  more  transparency  to  drug  pricing,  review  the  relationship  between  pricing  and  manufacturer  patient  programs  and  reform
government  program  reimbursement  methodologies  for  drugs.  In  some  international  markets,  the  government  controls  the  pricing,  which  can  affect  the
profitability  of  drugs.  Current  government  regulations  and  possible  future  legislation  regarding  health  care  may  affect  coverage  and  reimbursement  for
medical  treatment  by  third-party  payors,  which  may  render  our  product  candidates,  if  approved,  not  commercially  viable  or  may  adversely  affect  our
anticipated future revenues and gross margins.

We  cannot  predict  the  extent  to  which  our  business  may  be  affected  by  these  or  other  potential  future  legislative  or  regulatory  developments.

However, future price controls or other changes in pricing regulation or negative publicity related to

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the pricing of pharmaceutical drugs generally could restrict the amount that we are able to charge for our future products, which would adversely affect our
anticipated revenue and results of operations.

The  insurance  coverage  and  reimbursement  status  of  newly  approved  products  is  uncertain.  Failure  to  obtain  or  maintain  adequate  coverage  and
reimbursement for our products, if approved, could limit our ability to market those products and decrease our ability to generate product revenue.

We expect that coverage and reimbursement by government and private payors will be essential for most patients to be able to afford our products.
Accordingly,  sales  of  our  product  candidates  will  depend  substantially,  both  domestically  and  abroad,  on  the  extent  to  which  the  costs  of  our  product
candidates will be paid by health maintenance, managed care, pharmacy benefit and similar healthcare management organizations, or will be reimbursed by
government  authorities,  private  health  coverage  insurers  and  other  third-party  payors.  Coverage  and  reimbursement  by  a  third-party  payor  may  depend
upon several factors, including the third-party payor’s determination that use of a product is:

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a covered benefit under its health plan;

safe, effective and medically necessary;

appropriate for the specific patient;

cost-effective; and

neither experimental nor investigational.

Obtaining  coverage  and  reimbursement  for  a  product  from  third-party  payors  is  a  time-consuming  and  costly  process  that  could  require  us  to
provide to the payor supporting scientific, clinical and cost-effectiveness data. We may not be able to provide data sufficient to gain acceptance with respect
to coverage and reimbursement. If coverage and reimbursement are not available, or are available only at limited levels, we may not be able to successfully
commercialize our product candidates. Even if coverage is provided, the approved reimbursement amount may not be adequate to realize a sufficient return
on our investment.

There is significant uncertainty related to third-party coverage and reimbursement of newly approved products. In the United States, third-party
payors, including government payors such as the Medicare and Medicaid programs, play an important role in determining the extent to which new drugs
and  biologics  will  be  covered  and  reimbursed.  The  Medicare  and  Medicaid  programs  increasingly  are  used  as  models  for  how  private  payors  and
government  payors  develop  their  coverage  and  reimbursement  policies.  It  is  difficult  to  predict  what  CMS  will  decide  with  respect  to  coverage  and
reimbursement  for  fundamentally  novel  products  such  as  ours,  as  there  is  no  body  of  established  practices  and  precedents  for  these  types  of  products.
Moreover, reimbursement agencies in the European Union may be more conservative than CMS. For example, several cancer drugs have been approved for
reimbursement in the United States and have not been approved for reimbursement in certain European Union Member States. It is difficult to predict what
third-party payors will decide with respect to the coverage and reimbursement for our product candidates.

Outside the United States, international operations generally are subject to extensive government price controls and other market regulations and
increasing emphasis on cost-containment initiatives in the EU, Canada and other countries may put pricing pressure on us. In many countries, the prices of
medical products are subject to varying price control mechanisms as part of national health systems. It also can take a significant amount of time after
approval of a product to secure pricing and reimbursement for such product in many counties outside the United States. In general, the prices of medicines
under  such  systems  are  substantially  lower  than  in  the  United  States.  Other  countries  allow  companies  to  fix  their  own  prices  for  medical  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 United States, the reimbursement for our products may be reduced compared with
the United States and may be insufficient to generate commercially reasonable product revenues.

Moreover, increasing efforts by government and third-party payors in the United States and abroad to cap or reduce healthcare costs may cause
such  organizations  to  limit  both  coverage  and  the  level  of  reimbursement  for  new  products  approved  and,  as  a  result,  they  may  not  cover  or  provide
adequate payment for our product candidates. Payors increasingly are considering new metrics as the basis for reimbursement rates, such as Average Sales
Price, Average Manufacturer Price, and Actual Acquisition Cost. The existing data for reimbursement based on some of these metrics is relatively limited,
although certain states have begun to survey acquisition cost data for the purpose of setting Medicaid reimbursement rates, and CMS has begun making
pharmacy National Average Drug Acquisition Cost and National Average Retail Price data publicly available on at least a monthly basis. Therefore, it may
be  difficult  to  project  the  impact  of  these  evolving  reimbursement  metrics  on  the  willingness  of  payors  to  cover  candidate  products  that  we  are  able  to
commercialize. We expect to experience pricing pressures in connection with the sale of any of our product candidates due to the trend toward managed
healthcare, the increasing influence of health maintenance organizations and additional potential legislative and administrative changes. The downward

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pressure  on  healthcare  costs  in  general,  particularly  prescription  drugs  and  surgical  procedures  and  other  treatments,  has  become  intense.  As  a  result,
increasingly high barriers are being erected to the entry of new products such as ours.

Ethical, legal and social issues related to genetic testing may reduce demand for our product candidates, if approved.

We  anticipate  that  prior  to  receiving  certain  gene  therapies,  patients  may  be  required  to  undergo  genetic  testing.  Genetic  testing  has  raised
concerns  regarding  the  appropriate  utilization  and  the  confidentiality  of  information  provided  by  genetic  testing.  Genetic  tests  for  assessing  a  person’s
likelihood of developing a chronic disease have focused public attention on the need to protect the privacy of genetic information. For example, concerns
have been expressed that insurance carriers and employers may use these tests to discriminate based on genetic information, resulting in barriers to the
acceptance of genetic tests by consumers. Concerns have also been raised about the accuracy of genetic testing. This could lead to governmental authorities
restricting genetic testing or calling for additional regulation of genetic testing, particularly for diseases for which there is no known cure. Any of these
scenarios could decrease demand for our product candidates, if approved.

Even  if  we  obtain  and  maintain  approval  for  our  product  candidates  from  the  FDA,  we  may  never  obtain  approval  for  them  outside  of  the  United
States, which would limit our market opportunities and adversely affect our business.

Approval of a product candidate in the United States by the FDA does not ensure approval of such product candidate by regulatory authorities in
other  countries  or  jurisdictions,  and  approval  by  one  foreign  regulatory  authority  does  not  ensure  approval  by  regulatory  authorities  in  other  foreign
countries or by the FDA. Sales of B-VEC or other future product candidates outside of the United States will be subject to foreign regulatory requirements
governing clinical trials and marketing approval. Even if the FDA grants marketing approval for a product candidate, comparable regulatory authorities of
foreign  countries  also  must  approve  the  manufacturing  and  marketing  of  the  product  candidate  in  those  countries.  Approval  procedures  vary  among
jurisdictions and can involve requirements and administrative review periods different from, and more onerous than, those in the United States, including
additional preclinical studies or clinical trials. In many countries outside the United States, a product candidate must be approved for reimbursement before
it  can  be  approved  for  sale  in  that  country.  In  some  cases,  the  price  that  we  intend  to  charge  for  our  product  candidates,  if  approved,  is  also  subject  to
approval. Obtaining a Marketing Authorization Application from the European Commission following the opinion of the EMA is a lengthy and expensive
process.  We  submitted  a  request  for  MAA  with  the  EMA  in  November  2022  for  B-VEC  for  the  treatment  of  DEB  in  patients  6  months  and  older.  The
Company was informed by the EMA in January 2023 to modify the PIP waiver request to include patients between birth and 6 months. The Company is
modifying the application so that the MAA procedure can officially start in the second half of 2023 with an approval expected in early 2024. Even if a
product  candidate  is  approved,  the  FDA  or  the  European  Commission,  as  the  case  may  be,  may  limit  the  indications  for  which  the  product  may  be
marketed, require extensive warnings on the product labeling or require expensive and time-consuming additional clinical trials or reporting as conditions
of approval. Regulatory authorities in countries outside of the United States and the EU also have requirements for approval of product candidates with
which we must comply prior to marketing in those countries. Obtaining foreign regulatory approvals and compliance with foreign regulatory requirements
could result in significant delays, difficulties and costs for us and could delay or prevent the introduction of our product candidates in certain countries.

Further, clinical trials conducted in one country may not be accepted by regulatory authorities in other countries. Also, regulatory approval for any
of our product candidates may be withdrawn. If we fail to comply with the regulatory requirements, our target market will be reduced and our ability to
realize the full market potential of our product candidates will be harmed and our business, financial condition, results of operations and prospects will be
adversely affected.

Increasing  demand  for  compassionate  use  or  expanded  access  of  our  unapproved  therapies  could  negatively  affect  our  reputation  and  harm  our
business.

We are developing our product candidates for illnesses for which there are currently limited to no available therapeutic options. At least one other
company has been the target of disruptive social media campaigns related to a request for access to unapproved drugs for patients with significant unmet
medical need. If we experience a similar social media campaign regarding our decision to provide or not provide our product candidates under an expanded
access  corporate  policy,  our  reputation  may  be  negatively  affected  and  our  business  may  be  harmed.  Recent  media  attention  to  individual  patients’
expanded access requests has resulted in the introduction of legislation at the local and national level referred to as “Right to Try” laws, such as the Right to
Try Act, which are intended to give patients access to unapproved therapies. New and emerging legislation regarding expanded access to unapproved drugs
for life-threatening illnesses could negatively impact our business in the future.

A possible consequence of both activism and legislation in this area is the need for us to initiate an unanticipated expanded access program or to
make our product candidates more widely available sooner than anticipated. We are a small company with limited resources and unanticipated trials or
access programs could result in diversion of resources from our primary goals.

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In addition, some patients who receive access to unapproved drugs through compassionate use or expanded access programs have life-threatening
illnesses and have exhausted all other available therapies. The risk for serious adverse events in this patient population is high which could have a negative
impact on the safety profile of our product candidates if we were to provide them to these patients in accordance with our expanded access corporate policy,
which could cause significant delays or an inability to successfully commercialize our product candidates, which could materially harm our business. If we
were to provide patients with our product candidates under our expanded access corporate policy, we may in the future need to restructure or pause ongoing
compassionate  use  and/or  expanded  access  programs  in  order  to  perform  the  controlled  clinical  trials  required  for  regulatory  approval  and  successful
commercialization of our product candidates, which could prompt adverse publicity or other disruptions related to current or potential participants in such
programs.

Risks Related to Our Business Operations

We  may  not  be  successful  in  our  efforts  to  identify  or  discover  additional  product  candidates  and  may  fail  to  capitalize  on  programs  or  product
candidates that may be a greater commercial opportunity or for which there is a greater likelihood of success.

The  success  of  our  business  depends  upon  our  ability  to  identify,  develop  and  commercialize  product  candidates  based  on  our  gene  therapy
platform.  Research  programs  to  identify  new  product  candidates  require  substantial  technical,  financial  and  human  resources.  Although  certain  of  our
product candidates are currently in clinical or preclinical development, we may fail to identify other potential product candidates for clinical development
for several reasons. For example, our research may be unsuccessful in identifying potential product candidates or our potential product candidates may be
shown  to  have  harmful  side  effects,  may  be  commercially  impracticable  to  manufacture  or  may  have  other  characteristics  that  may  make  the  products
unmarketable or unlikely to receive marketing approval.

Additionally, because we have limited resources, we may forego or delay pursuit of opportunities with certain programs or product candidates or
for indications that later prove to have commercial potential. Our spending on current and future research and development programs may not yield any
commercially viable products. If we do not accurately evaluate the commercial potential for a particular product candidate, we may relinquish valuable
rights to that product candidate through strategic collaboration, licensing or other arrangements in cases in which it would have been more advantageous
for us to retain sole development and commercialization rights to such product candidate. Alternatively, 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.

If any of these events occur, we may be forced to abandon our development efforts with respect to a particular product candidate or fail to develop
a  potentially  successful  product  candidate,  which  could  have  a  material  adverse  effect  on  our  business,  financial  condition,  results  of  operations  and
prospects.

We have experienced significant growth in the number of employees and infrastructure and may experience difficulties in managing this growth. If we
are unable to manage expected growth in the scale and complexity of our operations, our performance may suffer.

We  have  experienced  a  period  of  significant  expansion  in  personnel  and  of  our  facilities,  infrastructure  and  overhead  as  we  develop  our  own
manufacturing facilities, build our sales, marketing and distribution infrastructure that we believe will be necessary to commercialize B-VEC, and increase
our  research  and  development  efforts.  The  anticipated  commercialization  of  B-VEC  and  our  ongoing  development  of  other  product  candidates,  will
continue to impose significant added capital requirements, as well as added responsibilities on members of management, including the need to identify,
recruit, maintain and integrate new personnel. Our future financial performance and our ability to compete effectively will depend, in part, on our ability to
manage our growth effectively. If we are successful in executing our business strategy, we will need to expand our managerial, operational, financial and
other systems and resources to manage our operations, continue our research and development activities and build a commercial infrastructure to support
commercialization of any of our product candidates that are approved for sale. Future growth would impose significant added responsibilities on members
of management. It is likely that our management, finance, development personnel, systems and facilities currently in place may not be adequate to support
this  future  growth.  Our  need  to  effectively  manage  our  operations,  growth  and  product  candidates  requires  that  we  continue  to  develop  more  robust
business processes and improve our systems and procedures in each of these areas and to attract and retain enough numbers of talented employees. We may
be unable to successfully implement these tasks on a larger scale and, accordingly, may not achieve our research, development and growth goals.

Our future success depends on our ability to retain key employees and scientific advisors and to attract, retain and motivate qualified personnel.

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We  are  highly  dependent  on  members  of  our  management  team,  the  loss  of  whose  services  may  adversely  impact  the  achievement  of  our
objectives. Our employees and scientific advisors are at-will employees and consultants, and the loss of one or more of them might impede the achievement
of our research, development and commercialization objectives.

Recruiting and retaining other qualified employees and scientific advisors for our business, including scientific and technical personnel, also will
be critical to our success. There currently is a shortage of skilled individuals with substantial gene therapy experience, which is likely to continue. As a
result, competition for skilled personnel, including in gene therapy research and vector manufacturing, is intense and the turnover rate can be high. We may
not be able to attract and retain personnel on acceptable terms given the competition among numerous pharmaceutical and biotechnology companies and
academic  institutions  for  individuals  with  similar  skill  sets.  In  addition,  failure  to  succeed  in  preclinical  or  clinical  trials  or  applications  for  marketing
approval  may  make  it  more  challenging  to  recruit  and  retain  qualified  personnel.  The  inability  to  recruit,  or  loss  of  services  of  certain  executives,  key
employees or advisors, may impede the progress of our research, development and commercialization objectives and have a material adverse effect on our
business, financial condition, results of operations and prospects.

Our employees, principal investigators and advisors may engage in misconduct or other improper activities, including non-compliance with regulatory
standards and requirements.

We are exposed to the risk of fraud or other misconduct by our employees, principal investigators and advisors. Misconduct by these parties could
include intentional failures to comply with FDA regulations or the regulations applicable in the EU and other jurisdictions, provide accurate information to
the FDA, the EMA and other regulatory authorities, comply with healthcare fraud and abuse laws and regulations in the United States and abroad, report
financial information or data accurately or disclose unauthorized activities to us. Sales, marketing and business arrangements in the healthcare industry are
subject  to  extensive  laws  and  regulations  intended  to  prevent  fraud,  misconduct,  kickbacks,  self-dealing  and  other  abusive  practices.  These  laws  and
regulations restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other
business arrangements. Such misconduct also could involve the improper use of information obtained in the course of clinical trials or interactions with the
FDA or other regulatory authorities, which could result in criminal and civil penalties or sanctions and cause serious harm to our reputation. It is not always
possible  to  identify  and  deter  employee  misconduct,  and  the  precautions  we  take  to  detect  and  prevent  this  activity  may  not  be  effective  in  controlling
unknown or unmanaged risks or losses or in protecting us from government investigations or other actions or lawsuits stemming from a failure to comply
with these laws or regulations. If any such actions are instituted against us and we are not successful in defending ourselves or asserting our rights, those
actions  could  have  a  significant  impact  on  our  business,  financial  condition,  results  of  operations  and  prospects,  including  the  imposition  of  significant
fines, criminal penalties, or other sanctions.

In  addition,  principal  investigators  for  our  clinical  trials  may  serve  as  scientific  advisors  or  consultants  to  us  from  time  to  time  and  receive
compensation in connection with such services. Under certain circumstances, we may be required to report some of these relationships to the FDA. The
FDA may conclude that a financial relationship between us and a principal investigator has created a conflict of interest or otherwise affected interpretation
of the trial. The FDA may therefore question the integrity of the data generated at the applicable clinical trial site and the utility of the clinical trial itself
may be jeopardized. This could result in a delay in approval, or rejection, of our marketing applications by the FDA and may ultimately lead to the denial
of marketing approval of our current and future drug candidates.

Healthcare legislative reform measures may have a material adverse effect on our business and results of operations.

In the United States and some foreign jurisdictions, there have been, and continue to be, several legislative and regulatory changes and proposed
changes  regarding  the  healthcare  system  that  could  prevent  or  delay  marketing  approval  of  our  product  candidates,  restrict  or  regulate  post-approval
activities, and affect our ability to profitably sell any product candidates for which we obtain marketing approval.

In the U.S., there have been and continue to be a number of legislative efforts to contain healthcare costs. For example, in March 2010, PPACA, as
amended  by  the  Health  Care  and  Education  Reconciliation  Act,  was  passed,  which  substantially  changed  the  way  healthcare  is  financed  by  both  the
government  and  private  insurers,  and  significantly  impacts  the  U.S.  pharmaceutical  industry.  The  PPACA,  among  other  things:  (i)  addresses  a  new
methodology  by  which  rebates  owed  by  manufacturers  under  the  Medicaid  Drug  Rebate  Program  are  calculated  for  drugs  that  are  inhaled,  infused,
instilled, implanted or injected; (ii) increases the minimum Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program and extends
the  rebate  program  to  individuals  enrolled  in  Medicaid  managed  care  organizations;  (iii)  establishes  annual  fees  and  taxes  on  manufacturers  of  certain
branded prescription drugs; (iv) expands the availability of lower pricing under the 340B drug pricing program by adding new entities to the program; and
(v)  establishes  a  new  Medicare  Part  D  coverage  gap  discount  program,  in  which  manufacturers  must  agree  to  offer  50%  point-of-sale  discounts  off
negotiated prices of applicable brand

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drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D.

Since its enactment, there have been numerous judicial, administrative, executive, and legislative challenges to certain aspects of the PPACA, and
we  expect  there  will  be  additional  challenges  in  the  future.  As  a  result,  there  have  been  delays  in  the  implementation  of,  and  action  taken  to  repeal  or
replace,  certain  aspects  of  the  PPACA.  Most  recently,  under  President  Biden,  the  Department  of  Justice  dropped  support  of  two  Supreme  Court  cases
challenging  the  PPACA  in  addition  to  a  case  before  the  U.S.  Court  of  Appeals  for  the  Fifth  Circuit,  and  in  June  2021,  the  Supreme  Court  upheld  the
PPACA  in  a  7-2  opinion  that  the  states  and  individuals  that  challenged  the  individual  mandate  did  not  have  standing  to  challenge  the  law.  Further,  on
January 28, 2021, President Biden signed an executive order to expand access to PPACA coverage, stating that it is the “policy” of the Biden administration
to protect and strengthen the PPACA and directing agencies to consider suspending, revising, or rescinding actions related to President Trump’s executive
orders that are inconsistent with this policy position. However, other legislators continue efforts to repeal and replace other elements of the PPACA. While
the ultimate outcome of PPACA result of these efforts is not yet known, any changes that result in price controls reduce access to and reimbursement for
care or add additional regulations may have an adverse effect on our financial condition and results of operations.

We cannot predict the impact that such actions against the PPACA or other health care reform under the Biden administration will have on our
business, and there is uncertainty as to what healthcare programs and regulations may be implemented or changed at the federal and/or state level in the
United States, or the effect of any future legislation or regulation. However, it is possible that such initiatives could have an adverse effect on our ability to
obtain approval and/or successfully commercialize products in the United States in the future. For example, any changes that reduce, or impede the ability
to obtain, reimbursement for the type of products we intend to commercialize in the United States (or our products more specifically, if approved) could
adversely affect our business plan to introduce our products in the United States.

While  Congress  has  not  passed  repeal  legislation,  the  Tax  Reform  Act  includes  a  provision  repealing,  effective  January  1,  2019,  the  tax-based
shared responsibility payment imposed by the PPACA on certain individuals who fail to maintain qualifying health coverage for all or part of a year that is
commonly referred to as the “individual mandate.” Further, the Bipartisan Budget Act of 2018, among other things, amended the PPACA, effective January
1, 2019, to increase from 50 percent to 70 percent the point-of-sale discount that is owed by pharmaceutical manufacturers who participate in Medicare Part
D and to close the coverage gap in most Medicare drug plans, commonly referred to as the “donut hole.” Congress may consider other legislation to repeal
and replace elements of the PPACA. Litigation and legislation over the PPACA are likely to continue, with unpredictable and uncertain results.

Other legislative changes have been proposed and adopted in the United States since the PPACA was enacted. For example, in August 2011, the
Budget Control Act of 2011, among other things, created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction,
tasked with recommending a targeted deficit reduction of at least $1.2 trillion for the years 2012 through 2021, was unable to reach required goals, thereby
triggering the legislation’s automatic reduction to several government programs. This includes aggregate reductions of Medicare payments to providers of
up to 2% per fiscal year, which went into effect in April 2013 and will remain in effect through 2027 unless additional Congressional action is taken. In
January 2013, the American Taxpayer Relief Act of 2012, among other things, further reduced Medicare payments to certain providers, and increased the
time for Medicare contractors to recoup Medicare overpayments to providers from three to five years. On August 16, 2022, the Inflation Reduction Act of
2022  (“IRA”)  was  signed  into  law.  The  IRA  includes  several  provisions  to  lower  prescription  drug  costs  for  people  with  Medicare  and  reduce  drug
spending  by  the  federal  government.  In  relevant  part,  the  IRA  allows  Medicare  to  negotiate  prices  for  certain  prescription  drugs,  requires  drug
manufacturers to pay a rebate to the federal government if prices for single-source drugs and biologicals covered under Medicare Part B and nearly all
covered drugs under Part D increase faster than the rate of inflation (“CPI-U”) and caps out of pocket spending for Medicare Part D enrollees and makes
other benefit design changes to Medicare Part D intended to lower drug costs for enrollees and Medicare. These requirements, which begin to go into effect
in 2023, will affect the amounts available through reimbursement for Medicare programs. These significant changes made under the IRA, which will affect
pricing for both brand and generic drugs, may affect reimbursement for our products.

Further, there has been heightened governmental scrutiny in recent years over the manner in which manufacturers set prices for their marketed
products  and  the  cost  of  prescription  drugs  to  consumers  and  government  healthcare  programs,  which  have  resulted  in  several  recent  Congressional
inquiries and proposed and enacted bills designed to, among other things, reduce the cost of prescription drugs, bring more transparency to product pricing,
review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for products.
In addition, the United States government, state legislatures, and foreign governments have shown significant interest in implementing cost containment
programs, including price-controls, restrictions on reimbursement and requirements for substitution of generic products for branded prescription drugs to
limit  the  growth  of  government  paid  health  care  costs.  For  example,  the  United  States  government  has  passed  legislation  requiring  pharmaceutical
manufacturers to provide rebates and discounts to certain entities and governmental payors to participate in federal healthcare programs. Individual states in
the United States have also

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been  increasingly  passing  legislation  and  implementing  regulations  designed  to  control  pharmaceutical  product  pricing,  including  price  or  patient
reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases,
designed to encourage importation from other countries and bulk purchasing.

Additional changes may affect our business, including those governing enrollment in federal healthcare programs, reimbursement changes, fraud
and  abuse  enforcement,  and  expansion  of  new  programs,  such  as  Medicare  payment  for  performance  initiatives.  On  October  14,  2022,  President  Biden
signed  Executive  Order  14087  on  “Lowering  Prescription  Drug  Costs  for  Americans.”  The  Executive  Order  specifically  requests  that  the  Center  for
Medicare and Medicaid Innovation consider “models that may lead to lower cost sharing for commonly used drugs and support value-based payment that
supports high-quality care.” The outcomes of the findings made under the Executive Order could lead to further drug pricing initiatives that could affect
reimbursement for our products.

These initiatives, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and
in  additional  downward  pressure  on  the  price  that  we  receive  for  any  approved  product.  Any  reduction  in  reimbursement  from  Medicare  or  other
government  programs  may  result  in  a  similar  reduction  in  payments  from  private  payors.  The  implementation  of  cost  containment  measures  or  other
healthcare  reforms  could  result  in  reduced  demand  for  our  product  candidates  or  additional  pricing  pressures  and  may  prevent  us  from  being  able  to
generate revenue, attain profitability, or commercialize our products.

We may be subject, directly or indirectly, to federal and state healthcare fraud and abuse laws, false claims laws and health information privacy and
security laws. If we are unable to comply, or have not fully complied, with such laws, we could face substantial penalties.

If we obtain FDA approval for our product candidates and begin commercializing them in the United States, our operations will be directly, or
indirectly through our prescribers, customers and purchasers, subject to various federal and state fraud and abuse laws and regulations, including, without
limitation, the federal Anti-Kickback Statute, federal civil and criminal false claims laws and the Physician Payments Sunshine Act and regulations. These
laws will impact, among other things, our proposed sales, marketing and educational programs. In addition, we may be subject to patient privacy laws by
both the federal government and the states in which we conduct our business as well as other jurisdictions. The laws that will affect our operations include,
but are not limited to:

•

•

•

•

•

•

the  federal  Anti-Kickback  Statute,  which  prohibits,  among  other  things,  persons  or  entities  from  knowingly  and  willfully  soliciting,
receiving, offering or paying any remuneration (including any kickback, bribe or rebate), directly or indirectly, overtly or covertly, in cash or
in  kind,  in  return  for  the  purchase,  recommendation,  leasing  or  furnishing  of  an  item  or  service  reimbursable  under  a  federal  healthcare
program, such as the Medicare and Medicaid programs. This statute has been interpreted to apply to arrangements between pharmaceutical
manufacturers  on  the  one  hand,  and  prescribers,  purchasers  and  formulary  managers  on  the  other.  The  PPACA  amended  the  intent
requirement of the federal Anti-Kickback Statute to clarify that a person or entity does not have to have actual knowledge of this statute or
specific intent to violate it;

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 or approval from Medicare, Medicaid or other government payors that
are false or fraudulent. The PPACA provides that a claim for items or services resulting from an Anti-Kickback Statute violation is a false
claim under the federal FCA. Cases against pharmaceutical manufacturers support the view that certain marketing practices, including off-
label promotion, may implicate the FCA;

the federal Health Care Fraud statute imposes criminal and civil liability for executing a scheme to defraud any healthcare benefit program or
making false statements relating to healthcare matters;

HIPAA,  as  amended  by  the  Health  Information  Technology  for  Economic  and  Clinical  Health  Act  (“HITECH”),  and  its  implementing
regulations,  and  as  amended  again  by  the  final  HIPAA  omnibus  rule,  Modifications  to  the  HIPAA  Privacy,  Security,  Enforcement,  and
Breach;

Notification Rules under HITECH and the Genetic Information Nondiscrimination Act; Other modifications to HIPAA, published in January
2013, which imposes certain requirements relating to the privacy, security and transmission of individually identifiable health information
without appropriate authorization by entities subject to the rule, such as health plans, health care clearinghouses and health care providers;

federal  transparency  laws,  including  the  federal  Physician  Payment  Sunshine  Act,  that  require  certain  manufacturers  of  drugs,  devices,
biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program, with
specific exceptions, to report annually to the CMS

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information  related  to:  (i)  payments  or  other  “transfers  of  value”  made  to  physicians  and  teaching  hospitals  and  (ii)  ownership  and
investment interests held by physicians and their immediate family members;

•

•

state and foreign law equivalents of each of the above federal laws, state laws that require drug manufacturers to report information related to
payments and other transfers of value to physicians and other healthcare providers or marketing expenditures and state laws governing the
privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and may not
have the same effect, thus complicating compliance efforts in certain circumstances, such as specific disease states; and

state and foreign laws that govern the privacy and security of health information in some circumstances, many of which differ from each
other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

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. If our operations are found to be in violation of any of the laws described
above  or  any  other  government  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 and the curtailment or restructuring of our
operations, any of which could adversely affect our ability to operate our business and our results of operations.

Often, to avoid the threat of treble damages and penalties under the FCA, health care providers will resolve allegations in a settlement without

admitting liability. Any such settlement could materially affect our business, financial operations, and reputation.

Efforts  to  ensure  that  our  business  arrangements  with  third  parties  will  comply  with  applicable  healthcare  laws  and  regulations  will  involve
substantial  costs.  It  is  possible  that  governmental  authorities  will  conclude  that  our  business  practices  may  not  comply  with  current  or  future  statutes,
regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations.

The risk of our being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the regulatory
authorities  or  the  courts,  and  their  provisions  are  open  to  a  variety  of  interpretations.  Any  action  against  us  for  violation  of  these  laws,  even  if  we
successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business.
The  shifting  compliance  environment  and  the  need  to  build  and  maintain  a  robust  and  expandable  systems  to  comply  with  multiple  jurisdictions  with
different compliance and/or reporting requirements increases the possibility that a healthcare company may run afoul of one or more of the requirements.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could
have a material adverse effect on the success of our business.

We  are  subject  to  numerous  environmental,  health  and  safety  laws  and  regulations,  including  those  governing  laboratory  procedures  and  the
generation, handling, use, storage, treatment, manufacture, transportation and disposal of, and exposure to, hazardous materials and wastes, as well as laws
and regulations relating to occupational health and safety. Our operations involve the use of hazardous and flammable materials, including chemicals and
biologic materials. Our operations also produce hazardous waste products. We generally contract with third parties for the disposal of these materials and
wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from our use of
hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. Moreover, certain environmental laws
may impose liability without regard to fault or legality of the action at the time of its occurrence. We also could incur significant costs associated with civil
or criminal fines and penalties. We do not carry specific biological or hazardous waste insurance coverage, and our property, casualty and general liability
insurance policies specifically exclude coverage for damages and fines arising from biological or hazardous waste exposure or contamination. Accordingly,
in the event of contamination or injury, we could be held liable for damages or be penalized with fines in an amount exceeding our resources, and our
clinical trials or regulatory approvals could be suspended.

Although we maintain workers’ compensation insurance for certain costs and expenses we may incur due to injuries to our employees resulting
from the use of hazardous materials or other work-related injuries, this insurance may not provide adequate coverage against potential liabilities. We do not
maintain insurance for toxic tort claims that may be asserted against us in connection with our storage or disposal of biologic, hazardous or radioactive
materials.

We also may incur substantial costs to comply with current or future environmental, health and safety laws and regulations, which have tended to
become  more  stringent  over  time.  These  current  or  future  laws  and  regulations  may  impair  our  research,  development  or  production  efforts.  Failure  to
comply with these laws and regulations also may result in

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substantial fines, penalties or other sanctions or liabilities, which could materially adversely affect our business, financial condition, results of operations
and prospects.

Unfavorable global economic conditions could adversely affect our business, financial condition or results of operations.

Our results of operations could be adversely affected by general conditions in the global economy and in the global financial markets, including
conditions that are outside of our control. Inflation and rising interest rates have caused volatility in the capital and credit markets, and it is unclear how
long such volatility will continue. A severe or prolonged economic downturn could result in a variety of risks to our business, including our ability to raise
additional  capital  when  needed  on  acceptable  terms,  if  at  all.  A  weak  or  declining  economy  could  strain  our  suppliers,  possibly  resulting  in  supply
disruption. Any of the foregoing could harm our business and we cannot anticipate all the ways in which the current economic climate and financial market
conditions could adversely impact our business.

Our  internal  computer  systems,  or  those  of  our  collaborators  or  other  contractors  or  consultants,  may  fail  or  suffer  security  breaches,  which  could
result in a material disruption of our product development programs.

Our internal computer systems and those of our current and any future collaborators and other contractors or consultants are vulnerable to damage
from computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. While we have not experienced
any such material system failure, accident or security breach to date, if such an event were to occur and cause interruptions in our operations, it could result
in  a  material  disruption  of  our  development  programs  and  our  business  operations,  whether  due  to  a  loss  of  our  trade  secrets  or  other  proprietary
information. For example, the loss of clinical trial data from completed or future 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 were to result in a loss of, or damage
to, our data or applications, or inappropriate disclosure of confidential or proprietary information, we could incur liability, our competitive position could
be harmed and the further development and commercialization of our product candidates could be delayed.

Cyber-security incidents, including data security breaches or computer viruses, could harm our business by disrupting our operations, damaging our
reputation or exposing us to liability.

We  receive,  process,  store,  and  transmit,  often  electronically,  confidential  data  of  others,  including  the  participants  in  our  clinical  trials.
Unauthorized access to our computer systems or stored data could result in the theft or improper disclosure of confidential information, the deletion or
modification of records, or could cause interruptions in our operations. These cyber-security risks increase when we transmit information from one location
to  another,  including  transmissions  over  the  Internet  or  other  electronic  networks.  Despite  implemented  security  measures,  our  facilities,  systems,  and
procedures, and those of our third-party service providers, may be vulnerable to security breaches, acts of vandalism, software viruses, misplaced or lost
data, programming and/or human errors, or other similar events which may disrupt our operations or expose confidential information of the patients who
participate  in  our  clinical  trials.  Any  security  breach  involving  the  misappropriation,  loss  or  other  unauthorized  disclosure  or  use  of  confidential
information of others, whether by us or a third-party, could: (i) subject us to civil and criminal penalties; (ii) have a negative impact on our reputation; or
(iii) expose us to liability to third parties or government authorities.

Our business continuity and disaster recovery plans may not adequately protect us from a serious disaster.

Natural disasters could severely disrupt our operations or the operations of third-party suppliers or service providers and have a material adverse
effect on our business, financial condition, results of operations and prospects. The severity and frequency of weather-related natural disasters have been
amplified,  and  are  expected  to  continue  to  be  amplified  by,  global  climate  change.  Such  natural  disasters  may  cause,  damage  to  and/or  disrupt  our
operations, which may result in a material adverse effect on our product sales, if approved, business and results of operations. Moreover, climate change
may also result in various chronic physical changes, such as changes in temperature or precipitation patterns or sea-level rise, that may also have an adverse
impact on our operations. Our suppliers, vendors and business partners also face similar risks, and any disruption to their operations could have an adverse
effect on our supply and manufacturing chain. 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  our  manufacturing  facilities,  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
that  we  have  in  place  currently  are  limited  and  may  not  prove  adequate  in  the  event  of  a  serious  disaster  or  similar  event.  Substantially  all  our  current
supply  of  our  product  candidates  is  located  at  our  manufacturing  facility  in  Pittsburgh,  Pennsylvania.  We  are  constructing  an  additional  manufacturing
facility for the commercial supply of our products. We may incur substantial expenses as a result of the limited nature of our disaster recovery and business
continuity plans, which could have a material adverse effect on our business, financial condition, results of operations and prospects.

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Increased attention to, and evolving expectations for, environmental, social, and governance (“ESG”) initiatives could increase our costs, harm our
reputation, or otherwise adversely impact our business.

Companies  across  industries  are  facing  increasing  scrutiny  from  a  variety  of  stakeholders  related  to  their  ESG  and  sustainability  practices.
Expectations  regarding  voluntary  ESG  initiatives  and  disclosures  may  result  in  increased  costs  (including  but  not  limited  to  increased  costs  related  to
compliance, stakeholder engagement, contracting and insurance), enhanced compliance or disclosure obligations, or other adverse impacts to our business,
financial condition, or results of operations.

While we may at times engage in voluntary initiatives (such as voluntary disclosures, certifications, or goals, among others) to improve the ESG
profile of our company and/or products, such initiatives may be costly and may not have the desired effect. Moreover, we may not be able to successfully
complete such initiatives due to factors that are within or outside of our control. Even if this is not the case, our actions may subsequently be determined to
be insufficient by various stakeholders, and we may be subject to investor or regulator engagement on our ESG efforts, even if such initiatives are currently
voluntary.

Certain  market  participants,  including  major  institutional  investors  and  capital  providers,  use  third-party  benchmarks  and  scores  to  assess
companies’ ESG profiles in making investment or voting decisions. Unfavorable ESG ratings could lead to increased negative investor sentiment towards
us or our industry, which could negatively impact our share price as well as our access to and cost of capital. To the extent ESG matters negatively impact
our  reputation,  it  may  also  impede  our  ability  to  compete  as  effectively  to  attract  and  retain  employees  or  customers,  which  may  adversely  impact  our
operations.

In  addition,  we  expect  there  will  likely  be  increasing  levels  of  regulation,  disclosure-related  and  otherwise,  with  respect  to  ESG  matters.  For
example, the SEC has published proposed rules that would require companies to provide significantly expanded climate-related disclosures in their periodic
reporting,  which  may  require  us  to  incur  significant  additional  costs  to  comply,  including  the  implementation  of  significant  additional  internal  controls
processes  and  procedures  regarding  matters  that  have  not  been  subject  to  such  controls  in  the  past,  and  impose  increased  oversight  obligations  on  our
management and board of directors. These and other changes in stakeholder expectations will likely lead to increased costs as well as scrutiny that could
heighten all of the risks identified in this risk factor. Additionally, many of our customers and suppliers may be subject to similar expectations, which may
augment or create additional risks, including risks that may not be known to us.

Risks Related to Our Intellectual Property

If  we  are  unable  to  obtain  and  maintain  adequate  U.S.  and  foreign  patent  protection  for  our  product  candidates,  including  our  current  product
candidates,  and  any  future  product  candidates  we  may  develop,  and/or  our  vector  platform,  or  if  the  scope  of  the  patent  protection  obtained  is  not
sufficiently  broad,  our  competitors  could  develop  and  commercialize  products  and  technologies  similar  or  identical  to  ours,  and  our  ability  to
successfully  commercialize  our  current  product  candidates,  any  future  product  candidates  we  may  develop,  and  our  platform  technologies  may  be
adversely affected.

Our success depends, in large part, on our ability to obtain and maintain patent protection in the United States and other countries with respect to
our current product candidates, and additional product candidates in our pipeline, and current and future innovations related to our vector platform. The
patent  prosecution  process  is  expensive,  time-consuming  and  complex;  we  may  not  be  able  to  file,  prosecute,  maintain,  and/or  enforce  all  necessary  or
desirable patent applications and issued patents at a reasonable cost or in a timely manner. We currently have seven issued patents in the United States: (1)
U.S. Patent No. 9,877,990, covering, in part, pharmaceutical formulations comprising our lead clinical product B-VEC, as well as methods of its use for
treating  wounds,  disorders,  and  diseases  of  the  skin,  which  we  refer  to  as  the  ’990  patent;  (2)  U.S.  Patent  No.  10,155,016  covering  pharmaceutical
compositions containing B-VEC formulated for myriad routes of administration; (3) U.S. Patent No. 10,441,614 covering aspects of our vector platform
technology, and its uses in delivering any gene of interest to the skin; (4) U.S. Patent No. 10,525,090, covering pharmaceutical compositions comprising
our clinical product candidate, KB105, and methods of its use for treating TGM1-deficient autosomal recessive congenital ichthyosis; (5) U.S. Patent No.
10,786,438 covering pharmaceutical compositions comprising vectors encoding cosmetic proteins, including our product candidate, KB301, and methods
of its use for improving skin condition, quality, and/or appearance; (6) U.S. Patent No. 10,829,529 covering methods of using KB407 for the treatment of
cystic  fibrosis  and  other  diseases  causing  progressive  lung  destruction;  and  (7)  U.S.  Patent  No.  11,185,564  covering  aspects  of  our  vector  platform
technology, and its uses in delivering any gene of interest to the skin. Furthermore, we have nine international patent applications filed in accordance with
the Paris Cooperation treaty directed to multiple discovery, preclinical, and clinical programs, including B-VEC, KB105, KB301, KB104, and KB407, as
well  as  multiple  patent  applications  filed  in  foreign  jurisdictions  stemming  from  these  international  applications.  B-VEC  is  also  the  subject  of  patents
granted  in  Australia,  Europe,  Japan,  Mexico,  New  Zealand,  and  Singapore  including  European  Patent  No.  3  377  637  B1,  covering  pharmaceutical
compositions containing B-VEC as well as uses thereof.

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Even if we are granted the patents we are currently pursuing, they may not issue in a form that will provide us with the full scope of protection we
desire,  they  may  not  prevent  competitors  or  other  third  parties  from  competing  with  us,  and/or  they  may  not  otherwise  provide  us  with  a  competitive
advantage. Our competitors, or other third parties, may be able to circumvent our patents by developing similar or alternative technologies or products in a
non-infringing manner. For example, there is no assurance that the '990 patent or any other patent we are granted will prevent third parties from developing
competing technologies. Moreover, our patent estate does not preclude third parties from having intellectual property rights that could interfere with our
freedom  to  use  our  platform,  including  for  dermatological  or  pulmonary  indications.  Even  assuming  patents  issue  from  our  pending  and  future  patent
applications, changes in either the patent laws or interpretation of the patent laws in the United States and foreign jurisdictions may diminish the value of
our patents or narrow their scope of protection.

We  also  may  not  be  aware  of  all  third-party  intellectual  property  rights  potentially  relating  to  technologies  similar  to  our  own.  Publications  of
discoveries in the scientific literature often lag their actual discoveries, and patent applications in the United States and other jurisdictions are typically not
published until 18 months after earliest priority date or, in some cases, not at all until patents are issued. Therefore, it is impossible to be certain that we
were the first to develop the specific technologies as claimed in any owned patents or pending patent applications, or that we were the first to file for patent
protection of such inventions.

We may not be able to protect our intellectual property rights throughout the world.

Filing, prosecuting and defending patents on each and every one of our product candidates, and current and future innovations related to our vector
platform,  in  all  countries  throughout  the  world  would  be  prohibitively  expensive,  and  intellectual  property  rights  in  some  countries  outside  the  United
States  may  differ  in  scope  from  those  eventually  granted  in  the  United  States.  Thus,  in  some  cases,  we  may  not  have  the  opportunity  to  obtain  patent
protection for certain technologies in some jurisdictions outside the United States. 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 United States. Consequently, we may not be able to prevent third parties from practicing
our inventions in all countries outside the United States, even in jurisdictions where we do pursue patent protection. Competitors may use our technologies
in  jurisdictions  where  we  have  not  pursued  and  obtained  patent  protection  to  develop  their  own  products  and,  further,  may  export  otherwise  infringing
products to territories where we have patent protection, but enforcement is not as strong as that in the United States. These products may compete with our
product candidates, 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. Such challenges in enforcing rights in these countries could make it difficult for us to stop
the infringement of our patents, if pursued and obtained, or marketing of competing products in violation of our proprietary rights generally. Proceedings to
enforce  our  current  and  future  patent  rights  in  foreign  jurisdictions  could  result  in  substantial  costs  and  may  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  any  future  patent  applications,  including
continuation  and  divisional  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 any
intellectual property rights around the world stemming from intellectual property that we develop may be inadequate to obtain a significant commercial
advantage in these foreign jurisdictions.

Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain
and could have a material adverse effect on the success of our business.

Our commercial success depends upon our ability (and the ability of any potential future collaborators) to develop, manufacture, market and sell
our  product  candidates,  and  to  freely  use  our  proprietary  technologies  (e.g.,  without  infringing  the  rights  and  intellectual  property  of  others).  Many
companies and institutions have filed, and continue to file, patent applications related to various aspects of gene therapy. Because patent applications can
take  many  years  to  issue,  may  be  confidential  for  18  months  or  more  after  filing,  and  can  be  revised  before  issuance,  there  may  be  applications  now
pending which may later result in issued patents that a third-party asserts are infringed by the manufacture, use, sale, or importation of our products. The
biotechnology and pharmaceutical industries are characterized by extensive and complex litigation regarding patents and other intellectual property rights.
We  may  become  party  to,  or  be  threatened  with,  adversarial  proceedings  or  litigation  regarding  intellectual  property  rights  with  respect  to  our  product
candidates  or  related  technologies,  including,  for  example,  interference  proceedings,  post  grant  review  challenges,  and  inter  partes  review  before  the
USPTO.  Our  competitors  or  other  third  parties  may  assert  infringement  claims  against  us,  alleging  that  our  therapeutics,  manufacturing  methods,
formulations or administration methods are covered by their patents. Moreover, we may face patent infringement claims from non-practicing entities that
have no relevant product revenue, and against whom our patent portfolio may therefore have no deterrent effect.

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There  is  a  risk  that  third  parties  may  choose  to  engage  in  litigation  with  us  to  enforce  or  to  otherwise  assert  their  patents  or  other  intellectual
property rights against us. Even if we believe such claims are without merit, a court of competent jurisdiction could hold that these third-party patents are
valid, enforceable and infringed, which could materially and adversely affect our ability to commercialize our products. In order to successfully challenge
the validity of any such U.S. patent in federal court, we would need to overcome a presumption of validity. As this burden is a high one requiring us to
present clear and convincing evidence as to the invalidity of any such U.S. patent claim, there is no assurance that a court of competent jurisdiction would
invalidate the claims of any such U.S. patent. In such a hypothetical situation, there is no assurance that a court of competent jurisdiction would find that
our product candidates or technologies do not infringe a third-party patent.

Patent and other types of intellectual property litigation can involve complex factual and legal questions, and their outcomes are uncertain. If we
are found, or believe there is a risk that we may be found, to infringe a third-party’s valid and enforceable intellectual property rights, we could be required
(or may choose) to obtain a license from such a third-party to continue developing, manufacturing and marketing our technologies. However, we may not
be  able  to  obtain  any  required  license  on  commercially  reasonable  terms,  if  at  all.  Even  if  we  were  able  to  obtain  a  license,  it  could  be  non-exclusive,
thereby giving our competitors and other third parties access to the same technologies licensed to us, and further, it could require us to make substantial
licensing  and  royalty  payments.  We  could  be  forced,  including  by  court  order,  to  cease  developing,  manufacturing  and  commercializing  the  infringing
technologies. We also could be found liable for monetary damages, including treble damages and attorneys’ fees, if we are found to have willfully infringed
a patent or other intellectual property right. A finding of infringement could prevent us from manufacturing and commercializing our technologies or force
us to cease some or all our business operations. Claims that we have misappropriated the confidential information or trade secrets of third parties could
have a similar negative impact on our business, financial condition, results of operations and prospects.

Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

Litigation or other legal proceedings relating to intellectual property claims, with or without merit, is unpredictable and generally expensive and
time  consuming.  Competitors  may  infringe  our  current  or  future  patents,  should  such  patents  issue,  or  we  may  be  required  to  defend  against  claims  of
infringement or other unauthorized use of intellectual property. Even if resolved in our favor, litigation or other legal proceedings relating to intellectual
property claims may cause us to incur significant expenses and could distract our scientific and management personnel from their normal responsibilities.
Furthermore, 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 this type of litigation. In addition, there could be public announcements of the results
of hearings, motions, or other interim proceedings or developments, and if securities analysts or investors perceive these results to be negative, it could
have a substantial adverse effect on the price of our common stock. Such litigation or proceedings could substantially increase our operating losses and
reduce the resources available for development activities or any future sales, marketing, or distribution activities.

We may not have sufficient financial or other resources to adequately conduct such litigation or proceedings. Some of our competitors may be able
to sustain the costs of such litigation or proceedings more effectively than we can because of their greater financial resources. Accordingly, despite our
efforts,  we  may  not  be  able  to  prevent  third  parties  from  infringing,  misappropriating,  or  successfully  challenging  our  intellectual  property  rights.
Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could have a material adverse effect on our ability to
compete in the marketplace.

We have been subject to claims asserting that we, our employees or our advisors have wrongfully used or disclosed alleged trade secrets of other parties
or claims asserting ownership of what we regard as our own intellectual property and we may face other such claims in the future.

Certain  of  our  employees  or  advisors  are  currently,  or  were  previously,  employed  at  universities  or  other  biotechnology  or  pharmaceutical
companies, including potential competitors, and we have and may in the future enter into agreements providing us with rights to intellectual property of
third parties for limited purposes. Although we try to observe the terms of agreements under which we obtain access to third-party intellectual property and
to ensure that our employees and advisors do not use the proprietary information or know-how of others in their work for us, we may be subject to claims
that these individuals, or we, have used or disclosed intellectual property, including trade secrets or other proprietary information, of third parties or the
current or former employers of employees or advisors. If we fail in defending any such claims, in addition to paying monetary damages, we may be subject
to an injunction and may lose valuable intellectual property rights or personnel. Moreover, any such litigation, or the threat thereof, may adversely affect
our ability to hire new employees or contract with independent contractors. A loss of key personnel or their work product could hamper or prevent our
ability to commercialize our products, which would have an adverse effect on our business, results of operations, and financial condition. Even if we are
successful in defending against such claims, litigation could result in substantial costs and be a distraction to management.

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While  it  is  our  policy  to  require  our  employees  and  contractors  who  may  be  involved  in  the  conception  of  intellectual  property  to  execute
agreements assigning such intellectual property rights to us, unforeseen complications may arise when fully and adequately executing such an agreement
with each party who, in fact, conceives of intellectual property that we regard as our own. Examples of such complications may include, for example, when
we  obtain  agreements  assigning  intellectual  property  to  us,  the  assignment  of  intellectual  property  rights  may  not  be  self-executing,  or  the  assignment
agreements may be breached. Such complications may lead to us being forced to bring claims against third parties or current and former employees, or
defend claims that they may bring against us, to determine the ownership of what we regard as our intellectual property. Moreover, individuals executing
agreements with us may have preexisting or competing obligations to a third-party, such as an academic institution, and thus an agreement with us may be
insufficient in fully perfecting ownership of inventions developed by that individual. Disputes about the ownership of intellectual property that we may
own may have a material adverse effect on our business.

Changes in U.S. patent law could diminish the value of patents in general, thereby impairing our ability to protect our product candidates.

Patent  reform  legislation  could  increase  the  uncertainties  and  costs  surrounding  the  prosecution  of  patent  applications  and  the  enforcement  or
defense of issued patents. For example, on September 16, 2011, the Leahy-Smith America Invents Act, or the Leahy-Smith Act, was signed into law. The
Leahy-Smith Act included several significant changes to U.S. patent law, including provisions that affected the way patent applications are prosecuted, and
altered strategies regarding patent litigation. These provisions also switched the United States from a “first-to-invent” system to a “first-to-file” system,
allowed third-party submissions of prior art to the USPTO during patent prosecution, and set forth additional procedures to attack the validity of a patent
through various post grant proceedings administered by the USPTO. As patent reform legislation can inject serious uncertainty into the patent prosecution
and  litigation  processes,  it  is  not  clear  what  impact  future  patent  reform  legislation  will  have  on  the  operation  of  our  business.  However,  such  future
legislation, and its implementation, could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or
defense of any issued patents, all of which could have a material adverse effect on our business, financial condition, results of operations and prospects.

Moreover, the patent positions of companies engaged in the development and commercialization of biologics and pharmaceuticals are particularly
uncertain given the ever evolving and constantly shifting nature of precedential patent cases decided by both the U.S. Court of Appeals for the Federal
Circuit and the U.S. Supreme Court. We cannot assure you that our efforts to seek patent protection for our technology and product candidates will not be
negatively impacted by the future court decisions or changes in guidance or procedures issued by the USPTO. These decisions, and any guidance issued by
the USPTO (or changes thereto), could have a material adverse effect on our existing patent portfolio and our ability to protect and enforce our intellectual
property rights in the future.

If our trademarks and trade names are not adequately protected, then we may not be able to build name recognition in our markets of interest and our
business may be adversely affected.

We  are  in  the  process  of  registering  our  trademarks  and  trade  names.  Once  trademarks  or  trade  names  have  been  registered,  they  may  be
challenged, infringed, circumvented or declared generic or determined to be infringing on other marks. We may not be able to protect our rights to these
trademarks and trade names, which are important for building name recognition among potential partners or customers in our markets of interest. At times,
competitors  may  adopt  trade  names  or  trademarks  similar  to  ours,  thereby  impeding  our  ability  to  build  brand  identity  and  possibly  leading  to  market
confusion. There also could be potential trade name or trademark infringement claims brought by owners of other registered trademarks or trade names that
incorporate variations of our registered or unregistered trademarks or trade names. Over the long term, if we are unable to establish name recognition based
on our trademarks and trade names, then we may not be able to compete effectively, and our business may be adversely affected. Our efforts to enforce or
protect our proprietary rights related to patents, trademarks, trade secrets, domain names, copyrights or other intellectual property may be ineffective and
could result in substantial costs and diversion of resources and could adversely impact our financial condition or results of operations.

Intellectual property rights and regulatory exclusivity rights do not necessarily address all potential threats.

The  degree  of  current  and  future  protection  afforded  by  our  intellectual  property  rights  is  uncertain  because  intellectual  property  rights  have

limitations and may not adequately protect our business or permit us to maintain our competitive advantage. For example:

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others may be able to make gene therapy products that are similar to our product candidates but that are not covered by the claims of our
current patents, or of patents that we may own or license in the future;

we, or any future license partners or collaborators, might not have been the first to file patent applications covering certain aspects of the
concerned technologies;

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others may independently develop similar or alternative technologies, or duplicate any of our technologies, potentially without falling within
the scope of our current or future issued claims, thus not infringing our intellectual property rights;

it is possible that our filed or future patent applications will not lead to issued patents;

issued patents to which we currently hold rights or to which we may hold rights in the future may be held invalid or unenforceable, including
as a result of legal challenges by third parties or our competitors;

others may have access to any future intellectual property rights licensed to us on a non-exclusive basis;

our competitors might conduct research and development activities in countries where we do not have or pursue patent rights, and then use
the information learned from such activities to develop competitive products for sale in our major commercial markets;

we may not develop additional proprietary technologies that are patentable;

the patents or other intellectual property rights of others may have an adverse effect on our business; and

we may choose not to file a patent application covering certain of our trade secrets or know-how, and a third-party may subsequently file a
patent covering such intellectual property.

Should any of these events occur, they could significantly harm our business, financial condition, results of operations and prospects.

Risks Related to Ownership of Our Common Stock

Our Chief Executive Officer and Chairman of the Board of Directors and our founder, President, Research & Development and director will have the
ability to substantially influence all matters submitted to stockholders for approval.

As of December 31, 2022, Krish S. Krishnan and Suma M. Krishnan, our Chief Executive Officer and Chairman of the Board and our founder,
President, Research & Development and director, respectively, in the aggregate, beneficially owned shares representing approximately 15% of our capital
stock. As a result, they will be able to substantially influence all matters submitted to our stockholders for approval, as well as our management and affairs.
For example, these persons would substantially influence the election of directors and approval of any merger, consolidation or sale of all or substantially
all our assets. This concentration of voting power could delay or prevent an acquisition of our company on terms that other stockholders may desire or
result in management of our company that our public stockholders disagree with.

If securities analysts publish negative evaluations of our stock, the price of our stock could decline.

The  trading  market  for  our  common  stock  relies  in  part  on  the  research  and  reports  that  industry  or  financial  analysts  publish  about  us  or  our
business. If securities analysts covering our business downgrade their evaluations of our stock, the price of our stock could decline. If one or more of these
analysts cease to cover our stock, we could lose visibility in the market for our stock, which in turn could cause our stock price to decline.

Raising  additional  capital  could  cause  the  price  of  our  common  stock  to  decline  and  cause  dilution  to  our  stockholders,  restrict  our  operations  or
require us to relinquish rights.

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of private

and public equity offerings, debt financings, collaborations, strategic alliances, and licensing arrangements. We may issue additional common stock or
restricted securities as part of such financing activities and any such issuances may have a dilutive effect on our then-existing stockholders. Sales of
substantial amounts of our common stock in the open market, or the availability of such shares for sale, could adversely affect the price of our common
stock.

The incurrence of indebtedness would result in increased fixed payment obligations and a portion of our operating cash flows, if any, being

dedicated to the payment of principal and interest on such indebtedness, 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.

If we are unable to raise additional funds through equity or debt financings when needed, and instead raise additional capital through marketing

and distribution agreements or other collaborations, strategic alliances, or licensing arrangements with third parties, we may have to relinquish certain
valuable rights to our current and future product candidates, technologies, future revenue streams or discovery programs or grant licenses on terms that may
not be favorable to us.

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The price of our common stock may be volatile and fluctuate substantially, which could result in substantial losses for holders of our common stock.

The price of our common stock has been and is likely to continue to be volatile. The stock market in general and the market for biopharmaceutical
or pharmaceutical companies specifically has experienced extreme volatility that has often been unrelated to the operating performance of such companies.
As a result of this volatility, you may not be able to sell your common stock at or above the price that you paid for it. The market price of our common
stock may be influenced by many factors, including:

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our ability to successfully proceed to and conduct clinical trials;

results of clinical trials of our product candidates or those of our competitors;

our  ability  to  obtain  regulatory  approval  for  our  product  candidates  and  our  ability  to  successfully  commercialize  any  of  our  approved
product candidates;

the success of competitive products or technologies;

commencement or termination of collaborations;

regulatory or legal developments in the United States and other countries;

developments or disputes concerning patent applications, issued patents or other proprietary rights;

the recruitment or departure of key personnel;

the level of expenses related to any of our product candidates or clinical development programs;

the results of our efforts to discover, develop, acquire or in-license additional product candidates;

actual or anticipated changes in estimates as to financial results, development timelines or recommendations by securities analysts;

our inability to manufacture adequate product supply for any approved product or inability to do so at acceptable prices;

disputes or other developments relating to proprietary rights, including patents, litigation matters and our ability to obtain patent protection
for our technologies;

significant lawsuits, including patent or stockholder litigation;

variations in our financial results or those of companies that are perceived to be similar to us;

changes in the structure of healthcare payment systems;

market conditions in the pharmaceutical and biotechnology sectors;

general economic, industry and market conditions; and

the other factors described in this “Risk Factors” section.

If  we  fail  to  maintain  effective  internal  control  over  financial  reporting,  we  may  not  be  able  to  accurately  report  our  financial  results,  which  may
adversely affect investor confidence in our company and, as a result, the value of our common stock.

Our  management  is  responsible  for  establishing  and  maintaining  adequate  internal  control  over  financial  reporting  and  is  required  to  have  an
independent auditor assess the effectiveness of our internal control over financial reporting, pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, as
amended (the “Sarbanes-Oxley Act”). We cannot give any assurances that material weaknesses will not be identified in the future in connection with our
compliance  with  the  provisions  of  Section  404  of  the  Sarbanes-Oxley  Act.  The  existence  of  any  material  weakness  would  preclude  a  conclusion  by
management  and  our  independent  auditors  that  we  maintained  effective  internal  control  over  financial  reporting.  Our  management  may  be  required  to
devote significant time and expense to remediate any material weaknesses that may be discovered and may not be able to remediate any material weakness
in  a  timely  manner.  The  existence  of  any  material  weakness  in  our  internal  control  over  financial  reporting  could  also  result  in  errors  in  our  financial
statements that could require us to restate our financial statements, cause us to fail to meet our reporting obligations and cause investors to lose confidence
in our reported financial information, all of which could lead to a decline in the per-share trading price of our common stock.

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Provisions in our corporate charter documents and under Delaware law could make an acquisition of us, which may be beneficial to our stockholders,
more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions in our corporate charter and our bylaws may discourage, delay or prevent a merger, acquisition or other change in control of us that
stockholders may consider favorable, including transactions in which you might otherwise receive a premium for your shares. These provisions also could
limit the price that investors might be willing to pay in the future for shares of our common stock, thereby depressing the market price of our common
stock. In addition, because our board of directors is responsible for appointing the members of our management team, these provisions may frustrate or
prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to replace members of
our board of directors. Among other things, these provisions:

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establish a classified board of directors such that not all members of the board are elected at one time;

allow the authorized number of our directors to be changed only by resolution of our board of directors;

limit the manner in which stockholders can remove directors from the board;

establish advance notice requirements for stockholder proposals that can be acted on at stockholder meetings and nominations to our board
of directors;

require that stockholder actions must be effected at a duly called stockholder meeting and prohibit actions by our stockholders by written
consent;

limit who may call stockholder meetings;

authorize our board of directors to issue preferred stock without stockholder approval, which could be used to institute a stockholder rights
plan,  or  so-called  “poison  pill,”  that  would  work  to  dilute  the  stock  ownership  of  a  potential  hostile  acquirer,  effectively  preventing
acquisitions that have not been approved by our board of directors; and

require the approval of the holders of at least 80% of the votes that all our stockholders would be entitled to cast to amend or repeal certain
provisions of our bylaws.

Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law,
which prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three years after
the date of the transaction in which the person acquired in excess of 15% of our outstanding voting stock, unless the merger or combination is approved in a
prescribed manner.

We have broad discretion in the use of our cash, cash equivalents and marketable securities and may not use them effectively.

Our management has broad discretion in the application of our cash, cash equivalents and marketable securities and could spend these funds in
ways  that  do  not  improve  our  results  of  operations  or  enhance  the  value  of  our  common  stock.  The  failure  by  our  management  to  apply  these  funds
effectively could result in financial losses that could have a material adverse effect on our business, cause the price of our common stock to decline and
delay the development of our product candidates. Pending their use, we may invest our cash and cash equivalents in a manner that does not produce income
or that loses value.

Because we do not anticipate paying any cash dividends on our capital stock in the foreseeable future, capital appreciation, if any, will be your sole
source of gain.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all our future earnings, if any, to finance the
growth and development of our business. In addition, the terms of any future debt agreements may preclude us from paying dividends. As a result, capital
appreciation, if any, of our common stock will be your sole source of gain for the foreseeable future.

Issuing additional shares of our common stock could cause the price of our common stock to decline and cause dilution to our stockholders.

As of December 31, 2022, we had 25.8 million shares of common stock issued and outstanding, and 80.0 million shares authorized for issuance.
As  of  December  31,  2022,  we  also  had  outstanding  options  to  purchase  3.6  million  shares  of  common  stock  with  a  weighted-average  exercise  price  of
$61.50 per share. Outstanding vested options are likely to be exercised if the market price of our common stock exceeds the applicable exercise price. As of
December  31,  2022,  we  had  66,600  non-vested  restricted  stock  awards  (“RSAs”)  at  a  weighted-average  price  of  $78.89.  We  expect  to  issue  additional
equity awards to

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directors and employees. The issuance of restricted common stock or common stock upon exercise of any outstanding options would be dilutive, and may
cause the market price for a share of our common stock to decline.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

As of December 31, 2022, we lease approximately 54,000 square feet of combined laboratory and office space in Pittsburgh, Pennsylvania that we
use for our research, development and manufacturing efforts. The lease for approximately 7,000 square feet of office space expires in September 2023, and
the lease covering the remaining combined laboratory and office space expires in October 2031.

As of December 31, 2022, we also lease additional U.S. office space in Boston, Massachusetts and European office space in Zug, Switzerland, and

Amsterdam, Netherlands.

In December 2019, we entered into a lease agreement for our second commercial gene therapy facility ("ASTRA") in the Pittsburgh, Pennsylvania
area,  which  contained  an  option  to  purchase  the  building.  In  January  2021,  we  entered  into  a  Purchase  and  Sale  Agreement  (“PSA”)  with  Northfield  I,
LLC, an Ohio limited liability company to acquire ASTRA, and the related purchase closed in March 2021. In June 2021, we entered into a Standard Form
of Contract for Construction and the corresponding General Conditions of the Contract for Construction with The Whiting-Turner Contracting Company
(“Whiting-Turner”), pursuant to which Whiting-Turner is constructing and managing the construction of ASTRA. The facility is under construction and
expected to be completed and validated in 2023. Refer to Note 7 of the Notes to the Consolidated Financial Statements included in Part II of Item 8 of this
Annual Report on Form 10-K for more information regarding this transaction.

Item 3. Legal Proceedings.

The information set forth in Note 6 of the Notes to the Consolidated Financial Statements included in Part II Item 8 of this Annual Report on Form

10-K is incorporated by reference into this Item 3.

Item 4. Mine Safety Disclosures.

Not applicable.

52

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information

Our common stock has been listed on the Nasdaq Capital Market under the symbol “KRYS” since September 2017. Prior to that, there was no

public market for our common stock.

On February 20, 2023, there were two stockholders of record of our common stock. We are unable to estimate the total number of stockholders
represented by these record holders, as many of our shares are held by brokers and other institutions on behalf of our stockholders. The closing price of our
common stock was $78.25 per share as of February 20, 2023 as reported on the Nasdaq Capital Market.

Dividend Policy

We have never declared or paid cash dividends on our capital stock. We currently intend to retain any future earnings for use in the operation and
growth of our business and do not intend to declare or pay any cash dividends in the foreseeable future. Any further determination to pay dividends on our
capital stock will be at the discretion of our board of directors, subject to applicable laws, and will depend on our financial condition, results of operations,
capital requirements, general business conditions and other factors that our board of directors considers relevant.

Purchases of Equity Securities by the Issuer or Affiliated Purchasers

There were no repurchases of shares of common stock made during the three months ended December 31, 2022.

Sales of Unregistered Securities

There were no sales of unregistered securities by us during the last three calendar years.

Stock Performance Graph

Set forth below is a graph comparing the cumulative total return on an indexed basis of a $100 investment in the Company’s common stock, the
Nasdaq Composite Index and the Nasdaq Biotechnology Index commencing on December 31, 2017 and continuing through December 31, 2022. The graph
assumes our closing sale price on December 31, 2017 of $10.52 per share as the initial value of our common stock for indexing purposes. Points on the
graph represent the performance as of the last business day of each of the months indicated.

The comparisons shown in the graph below are based upon historical data. We caution that the stock price performance shown in the graph below

is not necessarily indicative of, nor is it intended to forecast, the potential future performance of our common stock.

53

This performance graph shall not be deemed “soliciting material” or to be “filed” with the SEC for purposes of Section 18 of the Exchange Act or
incorporated  by  reference  into  any  filing  of  Krystal  Biotech,  Inc.  under  the  Securities  Act  or  the  Exchange  Act,  except  to  the  extent  we  specifically
incorporate it by reference into such filing. The past performance of our common stock is no indication of future performance.

54

Item 6. [Reserved]

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The  following  information  should  be  read  in  conjunction  with  the  consolidated  financial  statements  and  related  notes  thereto  included  in  this
Annual Report on Form 10-K. In addition to historical information, this report contains forward-looking statements that involve risks and uncertainties
which may cause our actual results to differ materially from plans and results discussed in forward-looking statements. We encourage you to review the
risks and uncertainties discussed in the sections entitled Item 1A. “Risk Factors” and “Forward-Looking Statements” included at the beginning of this
Annual Report on Form 10-K. The risks and uncertainties can cause actual results to differ significantly from those forecast in forward-looking statements
or implied in historical results and trends. We caution readers not to place undue reliance on any forward-looking statements made by us, which speak only
as of the date they are made. We disclaim any obligation, except as specifically required by law and the rules of the SEC, to publicly update or revise any
such statements to reflect any change in our expectations or in events, conditions or circumstances on which any such statements may be based, or that
may affect the likelihood that actual results will differ from those set forth in the forward-looking statements.

This section of this Form 10-K generally discusses 2022, 2021 and 2020 items and year-to-year comparisons between 2022 and 2021, and 2021

and 2020 of the Company’s results of operations and cash flows.

Overview

We  are  a  biotechnology  company  focused  on  developing  and  commercializing  genetic  medicines  for  patients  with  rare  diseases.  Using  our
patented platform that is based on engineered HSV-1, we create vectors that efficiently deliver therapeutic transgenes to cells of interest in multiple organ
systems.  The  cell’s  own  machinery  then  transcribes  and  translates  the  encoded  effector  to  treat  or  prevent  disease.  We  formulate  our  vectors  for  non-
invasive  or  minimally  invasive  routes  of  administration  at  a  healthcare  professional’s  office  or  potentially  in  the  patient’s  home  by  a  healthcare
professional. Our goal is to develop easy-to-use medicines to dramatically improve the lives of patients living with rare diseases and chronic conditions.
Our innovative technology platform is supported by in-house, commercial scale CGMP manufacturing capabilities. Refer to Part I, Item 1 - Business for
more information about our clinical development pipeline and research programs and the status of our product candidates.

Pipeline Highlights and Recent Developments:

•

B-VEC is a topical gel containing our novel vector designed to deliver two copies of the COL7A1 transgene for the treatment of DEB, a serious
rare skin disease caused by missing or mutated COL7 protein. We submitted a BLA to the FDA for B-VEC for the treatment of DEB in June 2022.
The FDA accepted the BLA in August 2022 granting B-VEC a Priority Review Designation with a PDUFA action date of February 17, 2023. In
January 2023, the FDA notified us, that based on manufacturing information submitted to the Agency on December 20, 2022 in response to an
information request from the FDA, the PDUFA date has been revised to May 19, 2023. In this notification, we were also informed that there will
be no Advisory Committee meeting for B-VEC and a REMS program is not needed for the B-VEC application. Commercial readiness efforts have
been  underway  for  the  past  two  years  as  we  prepare  for  the  potential  approval  of  B-VEC  by  the  FDA  and  the  EMA.  In  the  United  States  our
Medical Science Liaisons have been interacting with and educating HCPs on DEB and the importance of genetic testing in ensuring an accurate
diagnosis. We have completed the build of Krystal Connect, our US in-house patient services call center staffed with Krystal employees, and are
ready,  pending  FDA  approval  of  B-VEC,  to  assist  patients,  care  givers  and  HCPs  interested  in  accessing  B-VEC.  Additionally,  we  have  hired,
trained and deployed commercial field teams who are interacting with physicians, patients, commercial payers across the U.S. to educate on DEB
and to prepare for a U.S. launch of B-VEC. We are interacting frequently with the leading physicians in the major markets across Europe and in
Japan.

• We  submitted  a  request  for  MAA  with  the  EMA  in  November  2022  for  B-VEC  for  the  treatment  of  DEB  in  patients  6  months  and  older.  The
Company  was  informed  by  the  EMA  in  January  2023  to  modify  the  PIP  waiver  request  to  include  patients  between  birth  and  6  months.  The
Company is modifying the application so that the MAA procedure can officially start in the second half of 2023 with an approval expected in early
2024.

• KB105 is a topical gel containing our novel vector designed to deliver two copies of the TGM1 transgene for the treatment of TGM1-ARCI, a
serious rare skin disorder caused by missing or mutated TGM1 protein. A randomized, placebo-controlled Phase 1/2 study is ongoing. On July 1,
2021, we announced complete data from the Phase 1 trial, showing repeat topical KB105 dosing continued to be well tolerated with no adverse
events  or  evidence  of  immune  response.  Details  of  the  Phase  1/2  study  can  be  found  at  www.clinicaltrials.gov  under  NCT  identifier
NCT04047732.

55

Nothing included on this website shall be deemed incorporated by reference into this Annual Report on Form 10-K. We plan to initiate a Phase 2
study in 1H 2023.

• KB104 is a topical gel formulation of our novel vector designed to deliver two copies of the SPINK5 transgene for the treatment of Netherton
Syndrome,  a  debilitating  autosomal  recessive  skin  disorder  caused  by  missing  or  mutated  SPINK5  protein.  The  FDA  has  granted  KB104  rare
pediatric designation for the treatment of Netherton Syndrome. We plan to file an IND and initiate a clinical trial of KB104 to treat patients with
Netherton Syndrome in 2023.

• KB407  is  an  inhaled  (nebulized)  formulation  of  our  novel  vector  designed  to  deliver  two  copies  of  the  full-length  CFTR  transgene  for  the
treatment of cystic fibrosis, a serious rare lung disease caused by missing or mutated CFTR protein. On September 29, 2021, we announced that
the Bellberry Human Research Ethics Committee in Australia granted approval to conduct a Phase 1 clinical study of inhaled KB407 in patients
with  cystic  fibrosis,  and  trial  initiation  is  anticipated  in  first  half  of  2023.  In  August  2022,  we  announced  that  the  FDA  had  accepted  our  IND
application  to  evaluate  KB407  in  a  clinical  trial  to  treat  patients  with  cystic  fibrosis.  We  are  closely  working  with  Therapeutics  Development
Network (“TDN”) of the Cystic Fibrosis Foundation (“CFF”) to validate our Phase 1 clinical protocol and plan on initiating a Phase 1 clinical trial
in the US in first half of 2023.

• KB408  is  an  inhaled  (nebulized)  formulation  of  our  novel  vector  designed  to  deliver  two  copies  of  the  SERPINA1  transgene,  that  encodes  for
normal human alpha-1 antitrypsin protein, for the treatment of alpha-1 antitrypsin deficiency ("AATD"). We presented preclinical pharmacology
data for KB408 at the European Society of Gene & Cell Therapy Virtual Congress that was held October 19-22, 2021. We are planning to file an
IND for KB408 to treat AATD patients in 2023.

• KB301 is a solution formulation of our novel vector for intradermal injection designed to deliver two copies of the COL3A1 transgene to address
signs of aging or damaged skin caused by declining levels of, or damaged proteins within the extracellular matrix, including type III collagen. We
initiated a Phase 1 clinical trial, the PEARL-1 trial, for the treatment of aesthetic skin conditions on August 25, 2020. The Phase 1 dose-ranging
trial evaluated the safety, tolerability, and initial efficacy of intradermal injections of KB301 in adult subjects aged 18-75. Details of the Phase 1
study  can  be  found  at  www.clinicaltrials.gov  under  NCT  identifier  (NCT04540900).  Nothing  included  on  this  website  shall  be  deemed
incorporated by reference into this Annual Report on Form 10-K. Complete results from Cohort 1 focused on safety were presented at the 2021
SID Annual Meeting. In March 2022, we announced positive proof-of-concept efficacy and safety data from Cohort 2 of the PEARL-1 study of
KB301 for the treatment of aesthetic skin indications. Cohort 2 is a randomized, double-blind, placebo-controlled clinical trial that evaluated the
safety  and  efficacy  of  KB301  for  the  improvement  of  fine  lines  and  skin  texture  in  the  lower  and  upper  cheek  and  for  improvement  in  skin
thickness in the knee. Cohort 2 enrolled 27 subjects across two trial sites. Bilateral treatment areas included the neck behind the ear to assess initial
safety  and  on  the  cheek  below  and  above  the  zygomatic  arch  (lower  and  upper  cheek),  and  around  the  knee.  Subjects  were  randomized  2:1  to
receive low dose KB301 or placebo in the upper cheek and knee as multiple micro depot injections over the selected treatment area with a 33 G
needle. Subjects receiving KB301 in the lower check were randomized 2:1 to receive either low dose KB301, high dose KB301 or placebo. Four
patients  dropped  out  of  the  Cohort  2  study  –  one  subject  following  the  initial  safety  assessment  behind  the  ear,  two  subjects  for  unspecified
reasons, and one subject due to unevenness in face between active and placebo during the study. A subset of subjects from the PEARL-1 Cohort 2
trial (Cohort 3) were enrolled into a durability trial to look for duration of effect, reduction of the unevenness in placebo treated sites, and for long
term safety monitoring. Ten subjects from the PEARL-1 Cohort 2 study were enrolled in durability trial, an open-label study to assess duration of
effect below the zygomatic arch (the lower cheek area). The extension cohort enrolled subjects who had received the high dose regimen of KB301
during the efficacy cohort in one or both of their lower cheeks. Subject Satisfaction Scores and Investigator Assessments were measured monthly
for  three  consecutive  visits  that  correspond  to  timepoints  up  to  nine-months  following  administration  of  the  last  dose  of  KB301.  In  addition,
subjects  with  placebo-treated  lower  cheeks  were  dosed  with  KB301  during  the  open-label  extension  cohort  to  normalize  their  appearance.  In
November 2022, we announced nine-month durability of effect in Cohort 3 of the PEARL-1 study of KB301. We are planning to initiate a Phase 2
study in fine lines in 2023.

Jeune Aesthetics has several other aesthetic medicine product candidates in various stages of preclinical development reflected in the chart above

in Item 1- Business.

Business Highlights:

•

•

In March 2022, we presented additional results from our Phase 3 study of the clinical efficacy and safety of B-VEC for the treatment of DEB
at the 2022 American Academy of Dermatology Annual Meeting.

In March 2022, results from the complete Phase 1/2 study of topical B-VEC for the treatment of DEB were published in Nature Medicine.

56

• On April 5, 2022, the Company issued and sold 434,782 shares of common stock at a weighted average price of $69.00 per share for net

proceeds of $29.1 million after deducting selling commissions of approximately $900 thousand.

• On April 28, 2022, the Company entered into a final settlement agreement with PeriphaGen, Inc. (“PeriphaGen”) to resolve all claims in the
trade secret litigation filed by PeriphaGen in May 2020. We paid PeriphaGen an upfront payment of $25.0 million for: (i) the release of all
claims  in  the  trade  secret  litigation  with  PeriphaGen;  (ii)  the  acquisition  of  certain  PeriphaGen  assets,  and  (iii)  the  grant  of  a  license  by
PeriphaGen for dermatological applications. Upon approval of the Company's first product by the FDA, the Company will pay PeriphaGen
an additional $12.5 million, followed by three additional $12.5 million contingent milestone payments upon reaching $100.0 million in total
cumulative sales, $200.0 million in total cumulative sales and $300.0 million in total cumulative sales.

•

•

•

•

In April 2022, following feedback from the FDA, we announced that we planned to offer patients with DEB, who were enrolled in the GEM-
3 OLE, the opportunity to be dosed in their homes by a health care professional.

In April 2022, Jeune Aesthetics announced the formation and members of its Scientific Advisory Board, comprised of industry leaders to
serve as strategic advisors assisting with program strategy and clinical development.

In May 2022, we presented new data entitled “GEM-3: phase 3 safety and immunogenicity results of Beremagene Geperpavec (“B-VEC”),
an investigational, topical gene therapy for dystrophic epidermolysis bullosa (DEB)” at the SID 2022 Annual Meeting.

In December 2022 full results from the GEM-3 trial of B-VEC for DEB were published in the New England Journal of Medicine.

COVID-19 Update

To date the impact of the COVID-19 pandemic on our business and clinical trials in the U.S. has been minimal. We will continue to assess the
potential impact of the pandemic on our business and operations, including our supply chain and preclinical and clinical trial activities. Outside of the U.S.,
we  have  experienced  pandemic-related  delays  in  clinical  trial  initiation  in  Australia,  and  we  will  continue  to  closely  monitor  the  impact  that  future
pandemic  developments  have  on  this  and  our  other  clinical  trials,  going  forward.  For  additional  information  regarding  the  impact  of  the  coronavirus
pandemic, please see “Risk Factors - Business interruptions resulting from the COVID-19 outbreak or similar public health crises could cause a disruption
of the development efforts of our product candidates and adversely impact our business.”

Financial Overview

Revenue

We currently have no approved products for commercial marketing or sale and have not generated any revenue from the sale of products or other
sources to date. In the future, we may generate revenue from product sales, royalties on product sales, or license fees, milestones, or other upfront payments
if  we  enter  into  any  collaborations  or  license  agreements.  We  expect  that  our  future  revenue  will  fluctuate  from  quarter  to  quarter  for  many  reasons,
including the uncertain timing and amount of any such sales.

Research and Development Expenses

Research and development expenses consist primarily of costs incurred to advance our preclinical and clinical candidates, which include:

•

•

•

•

expenses incurred under agreements with contract manufacturing organizations (“CMOs”), consultants and other vendors that conduct our
preclinical activities;

costs of acquiring, developing and manufacturing clinical trial materials and lab supplies;

facility costs, depreciation and other expenses, which include direct expenses for rent and maintenance of facilities and other supplies; and

payroll related expenses, including stock-based compensation expense.

We  expense  internal  research  and  development  costs  to  operations  as  incurred.  We  expense  third-party  costs  for  research  and  development
activities, such as the manufacturing of preclinical and clinical materials, based on an evaluation of the progress to completion of specific tasks such as
manufacturing of drug substance, fill/finish and stability testing, which is

57

provided to us by our vendors. We expect our research and development expenses will increase as we continue the manufacturing of preclinical and clinical
materials and manage the clinical trials of, and seek regulatory approval for, our product candidates and expand our product portfolio. In the near term, we
expect that our research and development expenses will increase as we continue our open label extension study for B-VEC, resume dosing with KB105
Phase 1/2 clinical trial, initiate a Phase 2 trial for KB301, initiate Phase 1 trials for KB407, initiate a Phase 1 trial for KB104, and incur preclinical expenses
for our other product candidates. Due to the numerous risks and uncertainties associated with product development, we cannot determine with certainty the
duration, costs and timing of clinical trials, and, as a result, the actual costs to complete clinical trials may exceed the expected costs.  

General and Administrative Expenses

General and administrative expenses consist principally of salaries and other related costs, including stock-based compensation, for personnel in
our executive, commercial, business development and other administrative functions. General and administrative expenses also include professional fees
associated with corporate and intellectual property related legal expenses, consulting and accounting services, facility-related costs and expenses associated
with obtaining and maintaining patents. Other general and administrative costs include travel expenses.

We anticipate that our general and administrative expenses will increase in the future to support the continued research and development of our
product candidates. These increases will likely include increased costs for insurance, costs related to the hiring of additional personnel and payments to
outside consultants, lawyers and accountants, among other expenses. Additionally, we anticipate that we will continue to increase our salary and personnel
costs and other expenses as a result of our preparation for commercial operations.

ASTRA Capital Expenditures

In March 2021, we closed on the purchase of the building that was constructed to house our second CGMP facility, ASTRA. We are currently in
the process of constructing the interior build-out of this facility and we have entered into a contract with Whiting-Turner who manages the construction of
ASTRA. Further, we have entered into various non-cancellable purchase agreements for long-lead materials to help avoid potential schedule disruptions or
material shortages. These contracts typically call for the payment of fees for services or materials upon the achievement of certain milestones. We expect to
continue to incur significant capital expenditures related to ASTRA as we construct and validate the facility, which is expected to be completed in 2023.

Interest Income

Interest income consists primarily of income earned from our cash, cash equivalents and investments.

Interest Expense

Interest  expense  consists  primarily  of  non-cash  interest  expense  recognized  to  accrete  the  build  to  suit  financial  obligation  to  a  balance  that

equaled the cash consideration that was paid upon the close of the purchase of ASTRA.

Critical Accounting Policies and Significant Judgments and Estimates

Our management’s discussion and analysis of our financial position and results of operations is based on our financial statements, which have been
prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of financial statements in conformity with GAAP
requires us to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. On an ongoing basis,
we evaluate estimates which include, but are not limited to, estimates related to clinical trial and contract manufacturing prepayments and accruals, stock-
based compensation expense, accrued expenses, the fair value of financial instruments, the incremental borrowing rate for lease liabilities, and the valuation
allowance included in the deferred income tax calculation during the period. We base our estimates on historical experience and other market-specific or
other  relevant  assumptions  that  we  believe  to  be  reasonable  under  the  circumstances.  Actual  results  may  differ  materially  from  those  estimates  or
assumptions.

While our significant accounting policies are described in more detail in the notes to our financial statements appearing elsewhere in this Annual
Report  on  Form  10-K,  we  believe  the  following  accounting  policies  to  be  most  critical  to  the  judgments  and  estimates  used  in  the  preparation  of  our
financial statements.

Accrued Research and Development Expenses

As part of the process of preparing our financial statements, we are required to estimate our accrued research and development expenses, prepaid

assets and other current liabilities. This process involves reviewing open contracts and

58

commitments, communicating with our personnel to identify services that have been performed for us 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 cost. The majority of our service providers
invoice us monthly in arrears for services performed or when contractual milestones are met. We make estimates of our accrued research and development
expenses, prepaid assets and other current liabilities as of each balance sheet date in our financial statements based on facts and circumstances known to us
at  that  time.  Examples  of  accrued  research  and  development  expenses,  prepaid  assets  and  other  current  liabilities  include  fees  paid  to  contract
manufacturers made in connection with the manufacturing of preclinical and clinical trials materials.

We base our expenses related to clinical manufacturing on our estimates of the services performed pursuant to contracts with the entities producing
clinical materials on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to contract and may result in uneven
payment  flows.  Payments  under  these  types  of  contracts  depend  heavily  upon  the  successful  completion  of  many  separate  tasks  involved  in  the
manufacturing  of  drug  product.  In  accruing  service  fees,  we  estimate  the  time  period  over  which  services  will  be  performed,  and  the  actual  services
performed in each period. If our estimates of the status and timing of services performed differs from the actual status and timing of services performed we
may report amounts that are too high or too low in any particular period. To date, there have been no material differences from our estimates to the amount
actually incurred.

Stock-Based Compensation

We  have  applied  the  fair  value  recognition  provisions  of  Financial  Accounting  Standards  Board  Accounting  Standards  Codification,  or  ASC,
Topic 718, Compensation—Stock Compensation (“ASC 718”), to account for stock-based compensation. We recognize compensation costs related to stock
options granted based on the estimated fair value of the awards on the date of grant. Described below is the methodology we have utilized in measuring
stock-based compensation expense.

ASC 718 requires all stock-based payments, including grants of stock options and restricted stock, to be recognized in the statements of operations
based on their grant-date fair values. Compensation expense is recognized on a straight-line basis based on the grant-date fair value over the associated
service period of the award, which is generally the vesting term.

Determining the amount of stock-based compensation to be recorded requires us to develop estimates of the fair value of stock-based awards as of
their  measurement  date.  We  recognize  stock-based  compensation  expense  over  the  requisite  service  period,  which  is  the  vesting  period  of  the  award.
Calculating the fair value of stock-based awards requires that we make assumptions. We use the Black-Scholes option pricing model to value our stock
option awards. Use of this valuation methodology requires that we make assumptions as to the volatility of our common stock, the risk-free interest rate for
a period that approximates the expected term of our stock options and our expected dividend yield. Once our own sufficient historical volatility data was
obtained, we eliminated the use of a representative peer group and as of Q4 2021 we use only our own historical volatility data in its estimate of expected
volatility given that there is now sufficient amount of historical information regarding the volatility of our own stock price. We use the simplified method to
calculate the expected term as prescribed by the SEC Staff Accounting Bulletin No. 107, Share-Based Payment as we do not have sufficient historical stock
option activity data to provide a reasonable basis upon which to estimate the expected term of stock options granted to employees. We utilize a dividend
yield of zero based on the fact that we have never paid cash dividends and have no current intention of paying cash dividends. The risk-free interest rate
used for each grant is based on the U.S. Treasury yield curve in effect at the time of grant for instruments with a similar expected life.

Leases

We  account  for  our  lease  agreements  in  accordance  with  Financial  Accounting  Standards  Board  (“FASB”)  Accounting  Standards  Codification
(“ASC”) Topic 842, Leases (“ASC 842”). As our lease agreements do not provide an implicit rate and as we do not have external borrowings, we use an
estimated incremental borrowing rate based on the information available at lease commencement in determining the present value of lease payments. The
incremental  borrowing  rate  is  the  rate  of  interest  that  we  would  expect  to  borrow  on  a  collateralized  and  fully  amortizing  basis  over  a  similar  term  an
amount equal to the lease payments in a similar economic environment.

For  lease  arrangements  where  it  has  been  determined  that  we  have  control  over  an  asset  that  is  under  construction  and  is  thus  considered  the
accounting owner of the asset during the construction period, we record a construction-in-progress asset (“CIP”) and corresponding financial obligation on
the consolidated balance sheet. Once the construction is complete, an assessment will be performed to determine whether the lease meets certain “sale-
leaseback” criteria. If the sale-leaseback criteria are determined to be met, we will remove the asset and related financial obligation from the balance sheet
and treat the building lease as either an operating or finance lease based on our assessment of the guidance. If, upon completion of construction, the project
does not meet the “sale-leaseback” criteria, the lease will be treated as a financing obligation and we will depreciate the asset over its estimated useful life
for financial reporting purposes.

59

Results of Operations

Years Ended December 31, 2022, 2021 and 2020

(in thousands)
Expenses

Research and development
General and administrative
Litigation settlement

Total operating expenses
Loss from operations

Other Expense

Interest and other income, net
Interest expense

Total interest and other income, net
Net loss

Research and Development Expenses

Years Ended December 31,

Change

2022

2021

2020

2022 vs.
2021

2021 vs.
2020

$

$

42,461  $
77,735 
25,000 
145,196 
(145,196)

5,221 
— 
5,221 
(139,975) $

27,884  $
40,391 
— 
68,275 
(68,275)

197 
(1,492)
(1,295)
(69,570) $

17,936  $
15,063 
— 
32,999 
(32,999)

832 
— 
832 
(32,167) $

14,577  $
37,344 
25,000 
76,921 
(76,921)

5,024 
1,492 
6,516 
(70,405) $

9,948 
25,328 
— 
35,276 
(35,276)

(635)
(1,492)
(2,127)
(37,403)

Research  and  development  expenses  increased  $14.6  million  for  the  year  ended  December  31,  2022  compared  to  the  year  ended  December  31,
2021. Higher research and development expenses were due to increases in payroll related expenses of $8.9 million which is primarily driven by an increase
in  personnel  to  support  overall  growth  and  includes  a  $4.5  million  increase  in  stock-based  compensation,  an  increase  in  outsourced  research  and
development activities of $2.3 million, an increase in preclinical, clinical and pre-commercial manufacturing activities of $1.0 million, and an increase in
other research and development expenses of $2.4 million, primarily due to increases in depreciation and licensing fees.

Research and development expenses increased $9.9 million for the year ended December 31, 2021 compared to the year ended December 31, 2020.
Higher  research  and  development  expenses  were  due  to  increases  in  preclinical,  clinical  and  pre-commercial  manufacturing  activities  of  $3.3  million,
payroll related expenses of approximately $3.1 million which is primarily driven by an increase in personnel to support overall growth and includes a $2.4
million  increase  in  stock-based  compensation,  an  increase  in  outsourced  research  and  development  activities  of  $2.0  million,  travel  related  expenses
associated with our clinical trial sites of $187 thousand, and other research and development expenses of $1.3 million, primarily due to depreciation and
rent.

General and Administrative Expenses

General  and  administrative  expenses  increased  $37.3  million  for  the  year  ended  December  31,  2022  compared  to  the  year  ended  December  31,
2021. Higher general and administrative spending was due largely to increased payroll related expenses of approximately $28.8 million which is primarily
driven by an increase in personnel to support overall growth and includes an approximate $13.4 million increase in stock-based compensation, increased
commercial  preparedness  expenses  of  approximately  $5.7  million,  increased  medical  affairs  costs  of  $581  thousand,  increased  travel  costs  of  $536
thousand,  and  an  increase  in  other  administrative  expenses  of  $2.9  million,  primarily  due  to  increases  in  utilities,  information  technology  costs,  and
conference fees. These increases were partially offset by a decrease in net legal costs of $1.2 million, which consists of a decrease in legal and professional
fees of $2.8 million offset by a decrease in litigation proceeds of approximately $1.6 million, due primarily to the settlement of the PeriphaGen litigation.

General  and  administrative  expenses  increased  $25.3  million  for  the  year  ended  December  31,  2021  compared  to  the  year  ended  December  31,
2020. Higher general and administrative spending was due largely to increased payroll related expenses of approximately $14.7 million which is primarily
driven by an increase in personnel to support overall growth and includes an approximate $9.6 million increase in stock-based compensation, commercial
preparedness expenses of approximately $3.8 million, legal and professional fees of approximately $3.7 million which is net of $2.1 million of insurance
proceeds,  software  related  costs  of  $1.0  million,  medical  affairs  costs  of  $508  thousand,  insurance  costs  of  $427  thousand  and  other  administrative
expenses of $1.2 million.

Litigation settlement

60

 
 
 
 
 
 
 
 
 
We incurred litigation settlement expenses for the year ended December 31, 2022 of $25.0 million, which consisted of the settlement of litigation

with PeriphaGen. See “Legal Proceedings” in Note 6 of the notes to consolidated financial statements included in this Form 10-K for more information.

Other Income (Expense)

Interest  and  other  income  for  the  year  ended  December  31,  2022,  2021,  and  2020  was  $5.2  million,  $197  thousand  and  $832  thousand,
respectively, and consisted of realized gains from maturities of our investments, interest, and dividend income earned from our cash, cash equivalents and
investments.

Interest expense for the year ended December 31, 2022, 2021 and 2020 was zero, $1.5 million, and zero, respectively. The 2021 interest expense
related to accretion of the financial obligation for the build to suit lease liability during the year ended December 31, 2021 to a balance that equaled the
purchase consideration for ASTRA.

Liquidity and Capital Resources

Overview

On December 31, 2022, our cash, cash equivalents and short-term investments balance was approximately $379.2 million. Since operations began,
we have incurred operating losses. Our net losses were $140.0 million, $69.6 million, and $32.2 million for the years ended December 31, 2022, 2021, and
2020  respectively.  At  December  31,  2022,  we  had  an  accumulated  deficit  of  $280.8  million.  With  the  net  proceeds  raised  from  our  previous  public
offerings, we believe that our cash, cash equivalents and short-term investments will be sufficient to allow us to fund our operations for at least 12 months
from the filing date of this Form 10-K.

As we continue to incur losses, a transition to profitability is dependent upon the successful development, approval and commercialization of our
product  candidates  and  the  achievement  of  a  level  of  revenues  adequate  to  support  our  cost  structure.  Furthermore,  we  expect  to  incur  increasing  costs
associated with satisfying regulatory and quality standards, maintaining product and clinical trials, and furthering our efforts around our current and future
product candidates. We may never achieve profitability, and until we do, the Company will continue to need to raise additional capital or obtain financing
from other sources.

Costs  related  to  clinical  trials  can  be  unpredictable  and  therefore  there  can  be  no  guarantee  that  we  will  have  sufficient  capital  to  fund  our
continued clinical studies of B-VEC, KB105, KB301 or our planned clinical and preclinical studies for our other product candidates, or our operations.
Further,  we  do  not  expect  to  generate  any  product  revenues  in  the  first  quarter  of  2023,  assuming  we  receive  marketing  approval  for  B-VEC  on  the
schedule we currently contemplate. While we are in the process of building out our internal vector manufacturing capacity, some of our manufacturing
activities will be contracted out to third parties. Additionally, we currently utilize third-party Contract Research Organizations (“CROs”) to carry out some
of our clinical development activities. As we seek to obtain regulatory approval for any of our product candidates, we expect to continue to incur significant
manufacturing  and  commercialization  expenses  as  we  prepare  for  product  sales,  marketing,  commercial  manufacturing,  packaging,  labeling  and
distribution. Furthermore, pursuant to our settlement agreement with PeriphaGen, we will be required to pay $12.5 million upon the approval of our first
product by the FDA, followed by three additional $12.5 million contingent milestone payments upon reaching $100.0 million in total cumulative sales,
$200.0  million  in  total  cumulative  sales  and  $300.0  million  in  total  cumulative  sales.  Our  funds  may  not  be  sufficient  to  enable  us  to  conduct  pivotal
clinical  trials  for,  seek  marketing  approval  for  or  commercially  launch  B-VEC,  KB105,  KB301  or  any  other  product  candidate.  Accordingly,  to  obtain
marketing approval for and to commercialize these or any other product candidates, we may be required to obtain further funding through public or private
equity offerings, debt financings, collaboration and licensing arrangements or other sources. Adequate additional financing may not be available to us on
acceptable terms, if at all. Our failure to raise capital when needed could have a negative effect on our financial condition and our ability to pursue our
business strategy.

Operating Capital Requirements

Our primary uses of capital are, and we expect will continue to be for the near future, compensation and related expenses, manufacturing costs for
preclinical and clinical materials, third-party clinical trial research and development services, laboratory and related supplies, clinical costs, legal and other
regulatory expenses, payments of settlement amounts to PeriphaGen and general overhead costs. In order to complete the process of obtaining regulatory
approval for any of our product candidates and to build the sales, manufacturing, marketing and distribution infrastructure that we believe will be necessary
to commercialize our product candidates, if approved, we may require substantial additional funding.

We  have  based  our  projections  of  operating  capital  requirements  on  assumptions  that  may  prove  to  be  incorrect  and  we  may  use  all  of  our

available capital resources sooner than we expect. Because of the numerous risks and uncertainties associated

61

with  research,  development  and  commercialization  of  pharmaceutical  products,  we  are  unable  to  estimate  the  exact  amount  of  our  operating  capital
requirements. Our future funding requirements will depend on many factors, including, but not limited to:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the timeline and cost of our OLE study for B-VEC;

the progress, timing and costs of our ongoing Phase 1/2 clinical trials for KB105;

the progress, results and costs of our Phase 2 clinical trials for KB301;

the progress, results and costs of our Phase 1 clinical trials for KB407;

the progress, timing, and costs of manufacturing of B-VEC;

the continued development and the filing of an IND application for future product candidates;

the initiation, scope, progress, timing, costs and results of drug discovery, laboratory testing, manufacturing, preclinical studies and clinical
trials for any other product candidates that we may pursue in the future, if any;

the costs of maintaining our own commercial-scale CGMP manufacturing facilities;

the outcome, timing and costs of seeking regulatory approvals;

the costs associated with manufacturing process development and evaluation of third-party manufacturers;

the extent to which the costs of our product candidates, if approved, will be paid by health maintenance, managed care, pharmacy benefit and
similar healthcare management organizations, or will be reimbursed by government authorities, private health coverage insurers and other
third-party payors;

the  costs  of  commercialization  activities  for  our  current  and  future  product  candidates  if  we  receive  marketing  approval  for  such  product
candidates  we  may  develop,  including  the  costs  and  timing  of  establishing  product  sales,  medical  affairs,  marketing,  distribution  and
manufacturing capabilities;

subject to receipt of marketing approval, if any, revenue received from commercial sale of our current and future product candidates;

the terms and timing of any future collaborations, licensing, consulting or other arrangements that we may establish;

the  amount  and  timing  of  any  payments  we  may  be  required  to  make,  or  that  we  may  receive,  in  connection  with  the  licensing,  filing,
prosecution,  maintenance,  defense  and  enforcement  of  any  patents  or  other  intellectual  property  rights,  including  milestone  and  royalty
payments and patent prosecution fees that we are obligated to pay pursuant to our license agreements;

our current license agreements remaining in effect and our achievement of milestones under those agreements;

our ability to establish and maintain collaborations and licenses on favorable terms, if at all; and

the extent to which we acquire or in-license other product candidates and technologies.

We may need to obtain substantial additional funding in order to receive regulatory approval and to commercialize our product candidates. To the
extent that we raise additional capital through the sale of common stock, convertible securities or other equity securities, the ownership interests of our
existing stockholders may be materially diluted and the terms of these securities could include liquidation or other preferences that could adversely affect
the  rights  of  our  existing  stockholders.  In  addition,  debt  financing,  if  available,  would  result  in  increased  fixed  payment  obligations  and  may  involve
agreements that include restrictive covenants that limit our ability to take specific actions, such as incurring additional debt, making capital expenditures or
declaring dividends, that could adversely affect our ability to conduct our business. If we are unable to raise capital when needed or on attractive terms, we
could be forced to significantly delay, scale back or discontinue the development or commercialization of our product candidates, seek collaborators at an
earlier stage than otherwise would be desirable or on terms that are less favorable than might otherwise be available, and relinquish or license, potentially
on unfavorable terms, our rights to our product candidates that we otherwise would seek to develop or commercialize ourselves.

Contractual Obligations

Operating Leases

Operating lease payments represent our commitments for future minimum rent made under non-cancelable leases for our corporate headquarters in
Pittsburgh, Pennsylvania, office location in Boston, Massachusetts, office locations in Switzerland and Netherlands, and for the ground lease associated
with our second CGMP manufacturing facility, ASTRA. The

62

total future payments for our operating lease obligations at December 31, 2022 are $17.8 million, of which $1.6 million is due in the next twelve months
and  the  remaining  payments  are  due  over  the  terms  of  the  respective  leases.  For  additional  details  regarding  our  leases,  see  Note  7  to  our  consolidated
financial statements included in this Annual Report on Form 10-K.

Clinical Supply and Product Manufacturing Agreements

We  enter  into  various  agreements  in  the  normal  course  of  business  with  CROs,  CMOs  and  other  third  parties  for  preclinical  research  studies,
clinical  trials  and  testing  and  manufacturing  services.  We  are  obligated  to  make  milestone  payments  under  certain  of  these  agreements.  The  estimated
remaining  commitment  as  of  December  31,  2022  under  these  agreements  is  approximately  $2.1  million,  all  of  which  is  expected  to  be  due  in  the  next
twelve months.

Commercial Preparedness Agreements

We  have  contracted  with  various  third  parties  to  facilitate,  coordinate  and  perform  agreed  upon  commercial  preparedness  and  market  research
activities relating to our lead product candidate, B-VEC. These contracts typically call for the payment of fees for services upon the achievement of certain
milestones. The estimated remaining commitment as of December 31, 2022 is $8.4 million, all of which is expected to be due in the next twelve months.

ASTRA Contractual Obligations

We have contracted with various third parties to construct our second CGMP facility, ASTRA. Additionally, we have entered into various non-
cancellable purchase agreements for long-lead materials to help avoid potential schedule disruptions or material shortages. These contracts typically call for
the payment of fees for services or materials upon the achievement of certain milestones. The estimated remaining commitment as of December 31, 2022 is
$16.3 million, all of which is expected to be due in the next twelve months.

Cash Flows

The following table summarizes our sources and uses of cash (in thousands):

Net cash used in operating activities
Net cash used in investing activities
Net cash provided by financing activities
Effect of exchange rate changes on cash and cash equivalents
Net change in cash

Operating Activities

Years Ended December 31,

2022
(100,569) $
(114,083)
35,347 
(41)
(179,346) $

$

$

2021

2020

(47,938) $

(226,770)
347,685 
— 
72,977  $

(26,083)
(11,181)
118,019 
— 
80,755 

Net cash used in operating activities for the year December 31, 2022 was $100.6 million and consisted primarily of a net loss of $140.0 million
adjusted for non-cash items of $36.6 million primarily made up of stock-based compensation expense of $33.2 million and depreciation and amortization of
$4.1 million, and cash provided by decreases in net working capital of approximately $2.8 million.

Net  cash  used  in  operating  activities  for  the  year  December  31,  2021  was  $47.9  million  and  consisted  primarily  of  a  net  loss  of  $69.6  million
adjusted for non-cash items of $19.1 million primarily made up of stock-based compensation expense of $15.3 million, depreciation and amortization of
$2.8 million and build to suit interest expense of $1.5 million, and cash provided by decreases in net working capital of approximately $2.5 million.

Net  cash  used  in  operating  activities  for  the  year  ended  December  31,  2020  was  $26.1  million  and  consisted  primarily  of  a  net  loss  of  $32.2
million  adjusted  for  non-cash  items  of  $5.2  million  primarily  made  up  of  depreciation  and  amortization  of  $1.9  million  and  stock-based  compensation
expense of $3.3 million, and cash provided by decreases in net working capital of approximately $918 thousand.

Investing Activities

Net cash used in investing activities for the year ended December 31, 2022 was approximately $114.1 million and consisted primarily of purchases
of  $318.8  million  of  available-for-sale  investment  securities,  and  expenditures  of  $53.0  million  on  the  build-out  of  our  ASTRA  facility,  leasehold
improvement of new office space, and purchases of computer and laboratory equipment, partially offset by proceeds of $257.7 million from maturities of
investments.

63

 
 
Net  cash  used  in  investing  activities  for  the  year  ended  December  31,  2021  was  approximately  $226.8  million  and  consisted  primarily  of
purchases of $190.5 million of available-for-sale investment securities, and expenditures of $68.3 million on the build-out of our ASTRA facility, leasehold
improvement of new office space, and purchases of computer and laboratory equipment, partially offset by proceeds of $32.0 million from maturities of
investments.

Net cash used in investing activities for the year ended December 31, 2020 was $11.2 million and consisted primarily of purchases of $3.2 million
of short-term available-for-sale investment securities, and expenditures of $14.8 million on the build-out of our ASTRA facility, leasehold improvement of
new office space, and purchases of computer and laboratory equipment, partially offset by proceeds of $6.9 million from maturities of short-term
investments.

Financing Activities

Net cash provided by financing activities for the year ended December 31, 2022 was $35.3 million and was primarily from proceeds from public
offerings  of  434,782  shares  of  our  common  stock  at  a  weighted  average  price  of  $69.00  per  share  through  our  at-the-market  equity  offering  program
(“ATM”)  Program.  Our  net  proceeds  from  the  offerings  were  $29.1  million  after  deducting  underwriting  discounts  and  commissions  of  approximately
$900 thousand. Additionally, we received $7.0 million of proceeds related to the exercise and settlement of employee stock options and restricted stock
awards, offset by $649 thousand of taxes paid for the settlement of restricted stock awards.

Net cash provided by financing activities for the year ended December 31, 2021 was $347.7 million and was primarily from proceeds from follow-
on public offerings of 2,211,538 shares of its common stock, including 288,461 shares purchased by the underwriters, at $65.00 per share and 2,866,667
shares  of  its  common  stock,  including  200,000  shares  purchased  by  the  underwriters,  at  $75.00  per  share.  Our  net  proceeds  from  the  offerings  were
$336.8  million  after  deducting  underwriting  discounts  and  commissions  of  approximately  $21.5  million,  and  other  offering  expenses  payable  of
$425 thousand.

Net cash provided by financing activities for the year ended December 31, 2020 was $118.0 million and was primarily from proceeds from our
public  offering  in  May  2020  of  2,275,000  shares  of  our  common  stock  to  the  public  at  $55  per  share.  Our  net  proceeds  from  the  offering  were  $117.2
million after deducting underwriting and commissions of approximately $7.5 million and other offering expenses of approximately $463 thousand.

Recent Accounting Pronouncements

See note 2 to our consolidated financial statements.

64

Item 7A. Qualitative and Quantitative Disclosures About Market Risk

We had cash, cash equivalents and short-term investments of approximately $379.2 million as of December 31, 2022, which consist primarily of
money market funds, commercial paper, corporate bonds, and government agency securities. The investments in these financial instruments are made in
accordance with an investment policy which specifies the categories, allocations and ratings of securities we may consider for investment. The primary
objective of our investment activities is to preserve principal while at the same time maximizing the income we receive without significantly increasing
risk. Some of the financial instruments in which we invest could be subject to market risk. This means that a change in prevailing interest rates may cause
the value of the instruments to fluctuate. For example, if we purchase a security that was issued with a fixed interest rate and the prevailing interest rate
later  rises,  the  value  of  that  security  will  probably  decline.  To  minimize  this  risk,  we  intend  to  maintain  a  portfolio  which  may  include  cash,  cash
equivalents and short-term investment securities available-for-sale in a variety of securities which may include money market funds, government and non-
government debt securities and commercial paper, all with various maturity dates. Based on our current investment portfolio, we do not believe that our
results of operations or our financial position would be materially affected by an immediate change of 10% in interest rates.

As of December 31, 2022, we have established operations in Europe and Australia and hold cash in Australian Dollars (“AUD”), Swiss Francs
(“CHF”), and Euros (“EUR”). We are subject to foreign exchange rate risk arising from transactions conducted in the aforementioned foreign currencies,
however our foreign operations are not currently material to our business. We do not believe that our results of operations or our financial position would
be materially affected by an immediate change of 10% in foreign currency exchange rates.

We do not hold or issue derivatives, derivative commodity instruments or other financial instruments for speculative trading purposes. Further, we
do  not  believe  our  cash,  cash  equivalents  and  short-term  investments  have  significant  risk  of  default  or  illiquidity.  While  we  believe  our  cash,  cash
equivalents and short-term investments do not contain excessive risk, we cannot provide absolute assurance that any investments we make in the future will
not be subject to adverse changes in market value. Our cash, cash equivalents and short-term investments are recorded at fair value.

65

Item 8. Financial Statements and Supplementary Data.

Reports of Independent Registered Public Accounting Firms (KPMG, LLP, Pittsburgh, PA (US Firm), PCAOB ID No. 185) (Mayer Hoffman
McCann P.C., San Diego, CA, PCAOB ID No. 199)

INDEX TO FINANCIAL STATEMENTS

Consolidated Balance Sheets as of December 31, 2022 and December 31, 2021

Consolidated Statements of Operations and Comprehensive Loss for the Years Ended December 31, 2022, December 31, 2021, and
December 31, 2020

Consolidated Statements of Stockholders’ Equity for the Years Ended December 31, 2022, December 31, 2021, and December 31, 2020

Consolidated Statements of Cash Flows for the Years Ended December 31, 2022, December 31, 2021, and December 31, 2020

Notes to Consolidated Financial Statements

F-2

F-4

F-5

F-6

F-7

F-8

F-1

 
 
 
 
 
 
 
 
 
 
Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors
Krystal Biotech, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheet of Krystal Biotech, Inc. and subsidiaries (the Company) as of December 31, 2022, the
related consolidated statements of operations and comprehensive loss, stockholders’ equity, and cash flows for the year then ended, and the related notes
(collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the
financial position of the Company as of December 31, 2022, and the results of its operations and its cash flows for the year 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 (2013) issued by
the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 27, 2023 expressed an unqualified opinion on the
effectiveness of the Company’s internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these
consolidated financial statements 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 the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audit included
performing procedures to assess the risks of material misstatement of the consolidated 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
consolidated financial statements. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well
as evaluating the overall presentation of the consolidated financial statements. We believe that our audit provides a reasonable basis for our opinion.

Critical Audit Matters

Critical audit matters are matters arising from the current period audit of the consolidated financial statements that were communicated or required to be
communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the consolidated financial statements and (2)
involved our especially challenging, subjective, or complex judgments. We determined that there are no critical audit matters.

We have served as the Company’s auditor since 2022.

Pittsburgh, Pennsylvania
February 27, 2023

/s/ KPMG LLP

F-2

Report of Independent Registered Public Accounting Firm

To the Board of Directors and
Stockholders of Krystal Biotech, Inc.:

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheet of Krystal Biotech, Inc. (the “Company”) as of December 31, 2021, and the related
consolidated statements of operations and comprehensive loss, stockholders’ equity and cash flows for the years ended December 31, 2021 and 2020, and
the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the
financial position of the Company as of December 31, 2021, and the results of their operations and their cash flows for the years ended December 31, 2021
and 2020, in conformity with accounting principles generally accepted in the United States of America.

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 Public Company Accounting Oversight Board (United States)
(“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.

/s/ Mayer Hoffman McCann P.C.

We have served as the Company's auditor since 2017, which ended in 2022.
San Diego, California
February 28, 2022

F-3

(In thousands, except shares and par value data)

Assets
Current assets

Cash and cash equivalents
Short-term investments
Prepaid expenses and other current assets

Total current assets

Property and equipment, net
Long-term investments
Right-of-use assets
Other non-current assets
Total assets

Liabilities and Stockholders' Equity
Current liabilities

Accounts payable
Current portion of lease liability
Accrued expenses and other current liabilities

Total current liabilities

Lease liability

Total liabilities

Commitments and contingencies (Note 6)
Stockholders' equity

Krystal Biotech, Inc.
Consolidated Balance Sheets

December 31,
2022

December 31,
2021

$

$

$

$

161,900  $
217,271 
4,608 
383,779 
161,684 
4,621 
8,042 
324 
558,450  $

3,981  $
1,561 
23,305 
28,847 
7,372 
36,219 

— 
803,718 
(728)
(280,759)
522,231 
558,450  $

341,246 
96,850 
4,171 
442,267 
112,355 
64,371 
7,228 
74 
626,295 

8,398 
1,041 
16,297 
25,736 
6,983 
32,719 

— 
734,523 
(163)
(140,784)
593,576 
626,295 

Common stock; $0.00001 par value; 80,000,000 shares authorized at December 31,

2022 and 2021; 25,763,743 and 25,207,985 shares issued and outstanding at December 31, 2022 and
2021, respectively

Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit

Total stockholders' equity
Total liabilities and stockholders' equity

The accompanying notes are an integral part of these consolidated financial statements.

F-4

 
 
 
Krystal Biotech, Inc.
Consolidated Statements of Operations and Comprehensive Loss

(In thousands, except share and per share data)
Expenses

Research and development
General and administrative
Litigation settlement

Total operating expenses
Loss from operations

Other Income (Expense)

Interest and other income, net
Interest expense

Net loss

Unrealized loss on available-for-sale securities and other

Comprehensive loss

Net loss per common share:
   Basic and diluted

2022

Year Ended
December 31,

2021

2020

42,461  $
77,735 
25,000 
145,196 
(145,196)

5,221 
— 
(139,975)
(565)
(140,540) $

27,884  $
40,391 
— 
68,275 
(68,275)

197 
(1,492)
(69,570)
(169)
(69,739) $

17,936 
15,063 
— 
32,999 
(32,999)

832 
— 
(32,167)
(4)
(32,171)

(5.49) $

(3.13) $

(1.71)

$

$

$

Weighted-average common shares outstanding:
   Basic and diluted

25,491,721 

22,196,846 

18,787,161 

The accompanying notes are an integral part of these consolidated financial statements.

F-5

 
 
 
(In thousands, except shares)

Balances at January 1, 2020

Issuance of common stock, net
Stock-based compensation expense
Unrealized loss on investments and other (1)
Net loss
Balances at December 31, 2020

Issuance of common stock, net
Stock-based compensation expense
Unrealized loss on investments and other (1)
Net loss
Balances at December 31, 2021

Issuance of common stock, net
Shares surrendered for taxes and forfeitures
Stock-based compensation expense
Unrealized loss on investments and other (1)
Net loss

Krystal Biotech, Inc.
Consolidated Statements of Stockholders' Equity

Common Stock

Shares

Amount

Additional
Paid-in
Capital

Accumulated
Other
Comprehensive
Income (loss)

Accumulated
Deficit

Total
Stockholders'
Equity

$

$

$

17,354,310 
2,359,910 
—
—
—

19,714,220 
5,493,765 
—
—
—

25,207,985 
573,637 
(17,879)
— 
— 
— 

— 
— 
—
—
—

— 
— 
—
—
—

— 
— 
— 
— 
— 
— 

— 

$

$

$

$

$

$

$

241,951 
118,035 
3,306 
—
—

363,292 
355,628 
15,603 
—
—

734,523 
36,063 
(649)
33,781 
— 
— 

$

$

$

10 
—
—
(4)
—

6 
—
—
(169)
—

(163)
— 
— 
— 
(565)
— 

$

$

$

(39,047)
—
—
—
(32,167)

(71,214)
—
—
—
(69,570)

(140,784)
— 
— 
— 
— 
(139,975)

803,718 

$

(728)

$

(280,759)

$

202,914 
118,035 
3,306 
(4)
(32,167)

292,084 
355,628 
15,603 
(169)
(69,570)

593,576 
36,063 
(649)
33,781 
(565)
(139,975)

522,231 

Balances at December 31, 2022

25,763,743 

$

(1)

Includes foreign currency translation loss of $78 thousand, gain of $7 thousand, and loss of $1 thousand for the years ended December 31, 2022, 2021, and 2020,
respectively.

The accompanying notes are an integral part of these consolidated financial statements.

F-6

 
 
 
 
 
 
 
 
 
Krystal Biotech, Inc.
Consolidated Statements of Cash Flows

(In thousands)
Operating Activities
Net loss
Adjustments to reconcile net loss to net cash used in operating activities

Years Ended December 31,

2022

2021

2020

$

(139,975) $

(69,570) $

(32,167)

Depreciation and amortization
Stock-based compensation expense
Loss on disposal of fixed assets
Non-cash interest expense
Other, net
Changes in operating assets and liabilities

Prepaid expenses and other current assets
Other non-current assets
Lease liability
Accounts payable
Accrued expenses and other current liabilities

Net cash used in operating activities

Investing Activities
Purchases of property and equipment
Purchases of investments
Proceeds from maturities of investments

Net cash used in investing activities

Financing Activities
Proceeds from issuance of common stock, net
Taxes paid related to settlement of restricted stock awards
Repayment of ASTRA build to suit liability

Net cash provided by financing activities

Effect of exchange rate changes on cash and cash equivalents

4,055 
33,230 
72 
— 
(762)

(311)
(150)
(647)
(1,254)
5,173 
(100,569)

(52,979)
(318,781)
257,677 
(114,083)

35,996 
(649)
— 
35,347 

(41)

2,769 
15,319 
— 
1,492 
(454)

(691)
65 
(285)
712 
2,705 
(47,938)

(68,336)
(190,462)
32,028 
(226,770)

355,645 
— 
(7,960)
347,685 

1,851 
3,272 
33 
— 
11 

(1,922)
(934)
685 
783 
2,305 
(26,083)

(14,843)
(3,205)
6,867 
(11,181)

118,019 
— 
— 
118,019 

— 

— 

Net change in cash and cash equivalents

(179,346)

72,977 

80,755 

Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of year

Supplemental Disclosures of Non-Cash Investing and Financing Activities
Unpaid purchases of property and equipment
Initial recognition of right-of-use assets

$

$
$

341,246 
161,900  $

268,269 
341,246  $

187,514 
268,269 

14,927  $
1,556  $

15,363  $
4,396  $

9,697 
911 

The accompanying notes are an integral part of these consolidated financial statements.

F-7

 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements

1.    Organization

Krystal Biotech, Inc. (the “Company,” or “we” or other similar pronouns) commenced operations in April 2016. In March 2017, the Company
converted from a California limited liability company to a Delaware C-corporation, and changed its name from Krystal Biotech LLC to Krystal Biotech,
Inc.  In  June  2018,  the  Company  incorporated  a  wholly-owned  subsidiary  in  Australia  for  the  purpose  of  undertaking  preclinical  and  clinical  studies  in
Australia. In April 2019, the Company incorporated Jeune Aesthetics, Inc (“Jeune Aesthetics”), in Delaware, a wholly-owned subsidiary, for the purpose of
undertaking preclinical and clinical studies for aesthetic skin conditions. In January 2022, August 2022, and December 2022, the Company incorporated
wholly-owned  subsidiaries  in  Switzerland,  Netherlands,  and  France,  respectively,  for  the  purpose  of  establishing  initial  operations  in  Europe  for  the
development and commercialization of Krystal's product pipeline.

We  are  a  biotechnology  company  focused  on  developing  and  commercializing  genetic  medicines  for  patients  with  rare  diseases.  Using  our
patented platform that is based on engineered HSV-1, we create vectors that efficiently deliver therapeutic transgenes to cells of interest in multiple organ
systems.  The  cell’s  own  machinery  then  transcribes  and  translates  the  encoded  effector  to  treat  or  prevent  disease.  We  formulate  our  vectors  for  non-
invasive  or  minimally  invasive  routes  of  administration  at  a  healthcare  professional’s  office  or  potentially  in  the  patient’s  home  by  a  healthcare
professional. Our goal is to develop easy-to-use medicines to dramatically improve the lives of patients living with rare diseases and chronic conditions.
Our  innovative  technology  platform  is  supported  by  in-house,  commercial  scale  Current  Good  Manufacturing  Practice  ("CGMP")  manufacturing
capabilities.

Liquidity

As of December 31, 2022, the Company had an accumulated deficit of $280.8 million. As the Company continues to incur losses, a transition to
profitability is dependent upon the successful development, approval and commercialization of its product candidates and the achievement of a level of
revenues adequate to support the Company’s cost structure. The Company may never achieve profitability, and unless and until it does the Company will
continue to need to raise additional capital or obtain financing from other sources. Management intends to fund future operations through its on hand cash
and  cash  equivalents,  the  sale  of  equity,  and  debt  financings  and  may  also  seek  additional  capital  through  arrangements  with  strategic  partners  or  other
sources. There can be no assurance that additional funding will be available on terms acceptable to the Company, if at all.

The Company is subject to risks common to companies in the biotechnology industry, including but not limited to the failure of product candidates
in clinical and preclinical studies, the development of competing product candidates or other technological innovations by competitors, dependence on key
personnel,  protection  of  proprietary  technology,  compliance  with  government  regulations  and  the  ability  to  commercialize  product  candidates.  The
Company expects to incur significant costs to expand it's commercialization capabilities in advance of the potential global regulatory approvals of it's lead
product, B-VEC. The Company believes that its cash, cash equivalents and short-term investments of approximately $379.2 million as of December 31,
2022 will be sufficient to allow the Company to fund its planned operations for at least the next 12 months from the date of this Annual Report on Form 10-
K.

2.    Summary of Significant Accounting Policies

Basis of Presentation

The  accompanying  consolidated  financial  statements  have  been  prepared  in  conformity  with  generally  accepted  accounting  principles  in  the
United States of America (“GAAP”). All intercompany balances and transactions have been eliminated in consolidation. Certain prior period amounts have
been reclassified to conform to the current period presentation. The reclassified amounts have no impact on the Company’s previously reported financial
position or results of operations.

Use of Estimates

The  preparation  of  consolidated  financial  statements  in  conformity  with  GAAP  requires  management  to  make  estimates  and  assumptions  that
affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates.
Management  considers  many  factors  in  developing  the  estimates  and  assumptions  that  are  used  in  the  preparation  of  these  financial  statements.
Management must apply significant judgment in this process. In addition, other factors may affect estimates, including: expected business and operational
changes, sensitivity and volatility associated with the assumptions used in developing estimates, and whether historical trends are expected to be

F-8

Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

representative  of  future  trends.  The  estimation  process  often  may  yield  a  range  of  potentially  reasonable  estimates  of  the  ultimate  future  outcomes  and
management must select an amount that falls within that range of reasonable estimates. Estimates are used in the following areas, including: stock-based
compensation  expense,  accrued  expenses,  the  fair  value  of  financial  instruments,  the  incremental  borrowing  rate  for  lease  liabilities,  and  the  valuation
allowance included in the deferred income tax calculation.

Segment and Geographical Information

Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief
operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company and the Company’s
chief operating decision maker view the Company’s operations and manage its business in one operating segment, which is the business of developing and
commercializing pharmaceutical products.

Concentrations of Credit Risk and Off-Balance Sheet Risk

Financial instruments that potentially subject the Company to credit risk consist of cash, cash equivalents and investments. The Company’s policy
is  to  invest  its  cash,  cash  equivalents  and  investments  in  money  market  funds,  corporate  bonds,  commercial  paper,  government  agency  securities  and
various other bank deposit accounts. The counterparties to the agreements relating to the Company’s investments consist of financial institutions of high
credit  standing.  The  Company  is  exposed  to  credit  risk  in  the  event  of  default  by  the  financial  institutions  to  the  extent  amounts  recorded  on  the
consolidated balance sheets are in excess of insured limits. The Company has not experienced any credit losses in such accounts and does not believe it is
exposed to any significant credit risk on these funds. The Company has no financial instruments with off-balance sheet risk of loss.

Cash, Cash Equivalents and Investments

Cash and cash equivalents consist of money market funds and bank deposits. Cash equivalents are defined as short-term, highly liquid investments

with original maturities of 90 days or less at the date of purchase.

Investments  with  maturities  of  less  than  one  year  are  classified  as  short-term  investments  on  the  consolidated  balance  sheets  and  consist  of
commercial  paper,  corporate  bonds,  and  government  agency  securities.  Investments  with  maturities  of  greater  than  one  year  are  classified  as  long-term
investments on the consolidated balance sheets and consist of corporate bonds and government agency securities. Accrued interest on investments is also
classified as short-term investments.

As our entire investment portfolio is considered available for use in current operations, we classify all investments as available-for-sale securities.
Available-for-sale  securities  are  carried  at  fair  value,  with  unrealized  gains  and  losses  reported  in  accumulated  other  comprehensive  loss,  which  is  a
separate component of stockholders’ equity in the consolidated balance sheets. Any premium arising at purchase is amortized to the earliest call date and
any discount arising at purchase is accreted to maturity. Amortization and accretion of premiums and discounts are recorded in interest and other income,
net, or general and administrative expenses in the consolidated statements of operations.

Fair Value of Financial Instruments

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market
participants  at  the  measurement  date.  There  is  a  three-level  hierarchy  that  prioritizes  the  inputs  used  in  determining  fair  value  by  their  reliability  and
preferred use, as follows:

•

•

•

Level 1—Valuations based on quoted prices in active markets for identical assets or liabilities.

Level 2—Valuations based on quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets
and liabilities in inactive markets, or other inputs that are observable, or can be corroborated by observable market data.

Level 3—Valuations based on inputs that are both significant to the fair value measurement and unobservable.

To the extent that a valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value
requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized
within Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value
measurement. 

There  have  been  no  significant  changes  to  the  valuation  methods  utilized  by  the  Company  during  the  periods  presented.  There  have  been  no

transfers between Level 1, Level 2, and Level 3 in any periods presented.

F-9

Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

The carrying amounts of financial instruments consisting of cash and cash equivalents, investments, prepaid expenses and other current assets,
accounts payable, accrued expenses and other current liabilities included in the Company’s consolidated financial statements, are reasonable estimates of
fair value, primarily due to their short maturities.

Our available-for-sale, short-term and long-term investments, which consist of commercial paper, corporate bonds, and U.S. government agency
securities are considered to be Level 2 financial instruments. The fair value of Level 2 financial assets is determined using inputs that are observable in the
market or can be derived principally from or corroborated by observable market data such as pricing for similar securities, recently executed transactions,
cash  flow  models  with  yield  curves,  and  benchmark  securities.  In  addition,  Level  2  financial  instruments  are  valued  using  comparisons  to  like-kind
financial instruments and models that use readily observable market data as their basis.

Property and Equipment, net

Property and equipment, net, is stated at cost, less accumulated depreciation. Maintenance and repairs that do not improve or extend the lives of
the respective assets are expensed to operations as incurred, while costs of major additions and betterments are capitalized. Upon disposal, the related cost
and accumulated depreciation is removed from the accounts and any resulting gain or loss is included in the results of operations. Depreciation is recorded
using the straight-line method over the estimated useful lives of the respective assets, which are as follows:

Computer equipment and software
Laboratory and manufacturing equipment
Furniture and fixtures
Leasehold improvements

3 - 7 years
3 - 20 years
3 - 7 years
lesser of remaining useful life or remaining life of lease

The Company reviews the estimated useful lives of its property and equipment on a continuing basis. In evaluating the useful lives, the Company
considers  how  long  assets  will  remain  functionally  effective,  whether  the  technology  continues  to  be  relevant  and  considers  other  competitive  and
economic factors. If the assessment indicates that the assets will be used for a shorter or longer period than previously anticipated, the useful life of the
assets  is  adjusted,  resulting  in  a  change  in  estimate.  Changes  in  estimates  are  accounted  for  on  a  prospective  basis  by  depreciating  the  current  carrying
values of the assets over their revised remaining useful lives.

A review performed by the Company in the current year indicated that certain pieces of lab equipment would be functional for a longer term than
previously estimated and as a result, the Company increased the useful lives of these assets from 7 to 15 years. This change was effective and accounted for
prospectively beginning in Q3 2022. The effect of this change in useful life estimate did not result in a material change to depreciation expense for the year
ended December 31, 2022.

Construction-in-progress (“CIP”) is not depreciated until the asset is placed in service.

Impairment of Long-Lived Assets

The  Company  evaluates  long-lived  assets  for  potential  impairment  when  events  or  changes  in  circumstances  indicate  the  carrying  value  of  the
assets  may  not  be  recoverable.  We  review  the  recoverability  of  the  net  book  value  of  long-lived  assets  whenever  events  and  circumstances  indicate
("triggering events") that the net book value of an asset may not be recoverable from the estimated undiscounted future cash flows expected to result from
its use and eventual disposition. In cases where a triggering event occurs and undiscounted expected future cash flows are less than the net book value, we
recognize an impairment loss equal to an amount by which the net book value exceeds the fair value of the asset. Long-lived assets to be disposed of are
reported at the lower of carrying amount or fair value less cost to sell. The Company not experienced any triggering events or recognized any impairment
losses for the years ended December 31, 2022, 2021, and 2020.

Leases

The Company accounts for its lease agreements in accordance with FASB ASC Topic 842, Leases. Right-of-use lease assets represent the right to
use an underlying asset during the lease term and the lease liabilities represent the commitment to make lease payments arising from the lease. Right-of-
use lease assets and obligations are recognized based on the present value of remaining lease payments over the lease term. As the Company’s existing
lease  agreements  do  not  provide  an  implicit  rate  and  as  the  Company  does  not  have  any  external  borrowings,  the  Company  has  used  an  estimated
incremental borrowing rate based on the information available at lease commencement in determining the present value of lease payments. Operating lease
expense is recognized on a straight-line basis over the lease term. Variable lease expense is recognized in the period in which the obligation for the payment
is incurred. In addition, the Company also has made an accounting policy election to exclude leases with an initial term of twelve months or less from its
consolidated balance sheets and to account for lease and non-lease components of its operating leases as a single component.

F-10

Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

For lease arrangements where it has been determined that the Company has control over an asset that is under construction and is thus considered
the  accounting  owner  of  the  asset  during  the  construction  period,  the  Company  records  a  construction  in  progress  asset  and  corresponding  financial
obligation on the consolidated balance sheet. Once the construction is complete, an assessment is performed to determine whether the lease meets certain
“sale-leaseback” criteria. If the sale-leaseback criteria are determined to be met, the Company will remove the asset and related financial obligation from
the consolidated balance sheet and treat the lease as either an operating or finance lease based on an assessment of the guidance. If, upon completion of
construction, the project does not meet the “sale-leaseback” criteria, the lease will be treated as a financing obligation and the Company will depreciate the
asset over its estimated useful life for financial reporting purposes once the asset has been placed into service.

Research and Development Expenses

Research  and  development  costs  are  charged  to  expense  as  incurred  in  performing  research  and  development  activities.  These  costs  include
employee  compensation  costs,  facilities  and  overhead,  preclinical  and  clinical  activities,  clinical  manufacturing  costs,  contract  management  services,
regulatory and other related costs.

The  Company  estimates  contract  research  and  manufacturing  expenses  based  on  the  services  performed  pursuant  to  contracts  with  research
organization and manufacturing organizations that manufacture materials used in the Company’s ongoing preclinical and clinical studies. Non-refundable
advanced  payments  for  goods  or  services  to  be  received  in  the  future  for  use  in  research  and  development  activities  are  deferred  and  capitalized.  The
capitalized amounts are expensed as the related goods are delivered or the services are performed.

In accruing service fees, the Company estimates the time period over which services will be performed and the level of effort to be expended in
each  period.  These  estimates  are  based  on  communications  with  third-party  service  providers  and  the  Company’s  estimates  of  accrued  expenses  using
information  available  at  each  balance  sheet  date.  If  the  actual  timing  of  the  performance  of  services  or  the  level  of  effort  varies  from  the  estimate,  the
Company will adjust the accrual accordingly.

Stock-Based Compensation Expense

The  Company  applies  the  fair  value  recognition  provisions  of  Financial  Accounting  Standards  Board  (“FASB”)  Accounting  Standards
Codification (“ASC”) Topic 718, Compensation—Stock Compensation (“ASC 718”), to account for stock-based compensation. Compensation costs related
to stock options granted are based on the estimated fair value of the awards on the date of grant.

ASC 718 requires all stock-based payments, including grants of stock options and restricted stock, to be recognized in the consolidated statements
of operations based on their grant-date fair values. Compensation expense is recognized on a straight-line basis based on the grant-date fair value over the
associated service period of the award, which is generally the vesting term.

The Company estimates the fair value of its stock options using the Black-Scholes option pricing model, which requires the input of subjective
assumptions,  including:  (i)  the  expected  stock  price  volatility;  (ii)  the  expected  term  of  the  award;  (iii)  the  risk-free  interest  rate;  and  (iv)  expected
dividends.  Once  the  Company's  own  sufficient  historical  volatility  data  was  obtained  in  2021,  the  Company  eliminated  the  use  of  a  representative  peer
group and began using only its own historical volatility data in its estimate of expected volatility.

The Company estimates the expected term of its stock options using the “simplified” method, whereby the expected term equals the arithmetic
mean of the vesting term and the original contractual term of the option. The risk-free interest rates are based on US Treasury securities with a maturity
date commensurate with the expected term of the associated award. The Company has never paid and does not expect to pay dividends in the foreseeable
future. The Company accounts for forfeitures as they occur. Stock-based compensation expense recognized in the financial statements is based on awards
for which service conditions are expected to be satisfied.

Income Taxes

For the years ended December 31, 2022, 2021, and 2020, income taxes were recorded in accordance with FASB ASC Topic 740, Income Taxes
(“ASC 740”), which provides for deferred taxes using an asset and liability approach. Under this method, we record deferred tax assets and liabilities for
the expected future tax consequences of temporary differences between the financial statement carrying amounts and the tax basis of assets and liabilities
using enacted tax rates expected to be in effect when the differences are expected to reverse. Valuation allowances are provided when necessary to reduce
net deferred tax assets to the amount that is more likely than not to be realized. Based on the available evidence, we are unable, at this time, to support the
determination that it is more likely than not that our deferred tax assets will be utilized in the future. Accordingly, we recorded a full valuation allowance as
of December 31, 2022 and 2021. We intend to maintain a valuation allowance until sufficient evidence exists to support its reversal.

F-11

Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

The  Company  accounts  for  uncertain  tax  positions  in  accordance  with  the  provisions  of  ASC  740.  When  uncertain  tax  positions  exist,  the
Company recognizes the tax benefit of tax positions to the extent that the benefit will more likely than not be realized. The determination as to whether the
tax benefit will more likely than not be realized is based upon the technical merits of the tax position as well as consideration of the available facts and
circumstances. As of December 31, 2022 and 2021, the Company did not have any significant uncertain tax positions.

The Company may recognize interest and penalties related to uncertain tax positions in income tax expense. As of December 31, 2022 and 2021,
the Company had no accrued interest or penalties related to uncertain tax positions and no amounts have been recognized in the Company’s consolidated
statements of operations and comprehensive loss.

Comprehensive Loss

Comprehensive loss is defined as the change in equity during a period from transactions from non-owner sources. Unrealized gains or losses on
available-for-sale securities is a component of other comprehensive gains or losses and is presented net of taxes. We record reclassifications from other
comprehensive gains or losses to interest and other income, net on the consolidated statements of operations related to realized gains on sales of available-
for-sale securities.

The Company reviews its securities quarterly to determine whether an other-than-temporary impairment has occurred. The Company determined

that there were no other-than-temporary impairments during the years ended December 31, 2022, 2021, and 2020.

Recent Accounting Pronouncements

From time to time, new accounting pronouncements are issued by the FASB that the Company adopts as of the specified effective date. There
were no recently adopted accounting pronouncements that had a material impact on the Company's financial statements, and no recently issued accounting
pronouncements that are expected to have a material impact on the Company's financial statements.

3.    Net Loss Per Share Attributable to Common Stockholders

Basic  net  loss  per  share  attributable  to  common  stockholders  is  calculated  by  dividing  net  loss  attributable  to  common  stockholders  by  the
weighted  average  shares  outstanding  during  the  period,  without  consideration  for  common  stock  equivalents.  Diluted  net  loss  per  share  attributable  to
common stockholders is computed by dividing the net loss by the weighted-average number of shares of common stock and common share equivalents
outstanding  for  the  period.  Common  share  equivalents  consist  of  common  stock  issuable  upon  exercise  of  stock  options  and  vesting  of  restricted  stock
awards. There were 3,582,181, 2,043,179, and 853,614 common share equivalents outstanding in the form of stock options and 66,600, 98,800, and zero
unvested restricted stock awards as of December 31, 2022, 2021 and 2020, respectively, that have been excluded from the calculation of diluted net loss per
common share as their effect would be anti-dilutive for all periods presented.

(In thousands, except share and per share data)

Net loss per common share
Weighted-average basic and diluted common
   shares

Basic and diluted net loss per common share

4.    Fair Value Instruments

Years Ended December 31,

2022

2021

2020

(139,975) $

(69,570) $

(32,167)

25,491,721 

22,196,846 

18,787,161 

(5.49) $

(3.13) $

(1.71)

$

$

The  following  tables  show  the  Company’s  cash,  cash  equivalents  and  available-for-sale  securities  by  significant  investment  category  as  of

December 31, 2022 and 2021, respectively (in thousands):

F-12

 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

Amortized Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Aggregate Fair
Value

Cash and Cash
Equivalents

Short-term
Marketable
Securities (1)

Long-term
Marketable
Securities (2)

December 31, 2022

Level 1:
Cash and cash equivalents
Subtotal
Level 2:
Commercial paper
Corporate bonds
U.S government agency securities
Subtotal
Total

$

$

161,900  $
161,900 

63,624 
82,241 
76,683 
222,548 
384,448  $

—  $
— 

5 
13 
161 
179 
179  $

—  $
— 

161,900  $
161,900 

161,900  $
161,900 

—  $
— 

(23)
(419)
(393)
(835)
(835) $

63,606 
81,835 
76,451 
221,892 
383,792  $

— 
— 
— 
— 
161,900  $

63,606 
77,214 
76,451 
217,271 
217,271  $

— 
— 

— 
4,621 
— 
4,621 
4,621 

Amortized Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Aggregate Fair
Value

Cash and Cash
Equivalents

Short-term
Marketable
Securities (1)

Long-term
Marketable
Securities (2)

December 31, 2021

Level 1:
Cash and cash equivalents
Subtotal
Level 2:
Commercial paper
Corporate bonds
U.S government agency securities
Subtotal
Total

$

$

341,246  $
341,246 

40,469 
83,300 
37,621 
161,390 
502,636  $

—  $
— 

1 
10 
— 
11 
11  $

—  $
— 

341,246  $
341,246 

341,246  $
341,246 

(4)
(114)
(62)
(180)
(180) $

40,466 
83,196 
37,559 
161,221 
502,467  $

— 
—
—
— 
341,246  $

—  $
— 

40,466 
35,768 
20,616 
96,850 
96,850  $

— 
— 

— 
47,428 
16,943 
64,371 
64,371 

(1)
(2)

The Company’s short-term marketable securities mature in one year or less.
The Company’s long-term marketable securities mature between one year and two years.

See Note 2 to these consolidated financial statements for additional discussion regarding the Company’s fair value measurements.

F-13

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

5.    Balance Sheet Components

Property and Equipment, Net

Property and equipment, net consist of the following as of December 31, 2022 and 2021, respectively (in thousands):

Construction-in-progress
Leasehold improvements
Furniture and fixtures
Computer equipment and software
Laboratory and manufacturing equipment

Total property and equipment

Accumulated depreciation and amortization

Property and equipment, net

December 31,
2022

December 31,
2021

$

$

131,331  $
24,217 
957 
100 
11,872 
168,477 
(6,793)
161,684  $

104,340 
5,723 
891 
85 
5,530 
116,569 
(4,214)
112,355 

Depreciation expense was $2.6 million, $1.8 million and $1.5 million for the years ended December 31, 2022, 2021, and 2020, respectively.

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following as of December 31, 2022 and 2021, respectively (in thousands):

Accrued preclinical and clinical expenses
Accrued professional fees
Accrued payroll and benefits
Accrued construction in progress
Accrued financing fees
Accrued taxes
Other current liabilities

Total

F-14

December 31,
2022

December 31,
2021

$

$

1,365  $
3,397 
6,781 
11,452 
— 
43 
267 
23,305  $

1,602 
2,011 
2,882 
9,606 
26 
83 
87 
16,297 

 
 
 
 
 
 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

6.    Commitments and Contingencies

Significant Contracts and Agreements

Agreements with Contract Manufacturing Organizations and Contract Research Organizations

The  Company  enters  into  various  agreements  in  the  normal  course  of  business  with  Contract  Research  Organizations  (“CROs”),  Contract
Manufacturing Organizations (“CMOs”) and other third parties for preclinical research studies, clinical trials and testing and manufacturing services. The
agreements with CMOs relate to the manufacturing of sterile gel that is mixed with in-house produced vectors as part of the final drug product applied in
certain of our clinical trials. These agreements may also include research and development activities, storage, packaging, labeling, and/or testing of our
preclinical and clinical-stage products. The Company is obligated to make milestone payments under certain of these agreements. The estimated remaining
commitment as of December 31, 2022 under these agreements is approximately $2.1 million. The Company may also be responsible for the payment of a
monthly service fee for project management services for the duration of any agreements. The Company has incurred research and development expenses
under these agreements of $6.0 million, $5.0 million and $4.6 million for the years ended December 31, 2022, 2021, and 2020, respectively.

Commercial Preparedness Activities

The Company has contracted with various third parties to facilitate, coordinate and perform agreed upon commercial preparedness and market
research activities relating to our lead product candidate, B-VEC. These contracts typically call for the payment of fees for services upon the achievement
of  certain  milestones  or  as  services  are  rendered.  The  estimated  remaining  commitment  as  of  December  31,  2022  is  $8.4  million.  The  Company  has
incurred  expenses  under  these  activities  of  $14.2  million,  $6.1  million  and  $1.9  million  for  the  years  ended  December  31,  2022,  2021,  and  2020,
respectively.

ASTRA Contractual Obligations

The Company has contracted with various third parties to complete the interior build-out of our second CGMP facility, ASTRA. Additionally, the
Company  has  entered  into  various  non-cancellable  purchase  agreements  for  long-lead  materials  to  help  avoid  potential  schedule  disruptions  or  material
shortages.  These  contracts  typically  call  for  the  payment  of  fees  for  services  or  materials  upon  the  achievement  of  certain  milestones.  The  estimated
remaining  commitment  as  of  December  31,  2022  is  $16.3  million.  The  Company  has  included  costs  incurred  to-date  associated  with  ASTRA  within
construction-in-progress as of December 31, 2022.

In June 2021, the Company entered into a Standard Form of Contract for Construction and the corresponding General Conditions of the Contract
for Construction (collectively, the “Agreement”) with The Whiting-Turner Contracting Company (“Whiting-Turner”), pursuant to which Whiting-Turner is
constructing and managing the construction of ASTRA. Subject to certain conditions in the Agreement, the Company will pay Whiting-Turner a contract
price consisting of the cost of work plus a fee equal to 1.75% of the cost of work.

Effective September 2021, the Company entered into a guaranteed maximum price amendment (the "Amendment") to the Agreement to set forth
the guaranteed maximum price, as well as the date by which Whiting-Turner is to achieve Substantial Completion (as defined in the Agreement). Under the
Amendment, the guaranteed maximum price to be paid by the Company, which has been amended from time to time for change orders additional work is
awarded to Whiting-Turner, is currently $85.5 million. Whiting-Turner’s work under the Agreement represents a portion of the work necessary to complete
construction of the ASTRA facility and, therefore the date of Substantial Completion of Whiting-Turner’s work under the Agreement may not equate to the
date of completion of ASTRA. The guaranteed maximum price under the Agreement with Whiting-Turner constitutes only a portion of the total estimated
cost of building and equipping ASTRA as there are various other third parties engaged in the project for which contracts are not individually material.

Legal Proceedings

In  May  2020,  a  complaint  was  filed  against  the  Company  in  the  United  States  District  Court  for  the  Western  District  of  Pennsylvania  by
PeriphaGen, Inc. (“PeriphaGen”), which also named our Chief Executive Officer and President, R&D, Krish Krishnan and Suma Krishnan, respectively.
The  complaint  alleged  breach  of  contract  and  misappropriation  of  trade  secrets,  which  secrets  the  plaintiff  asserts  were  used  to  develop  our  product
candidates, including the vector backbones, and our STAR-D platform. We answered the complaint in June 2020 by denying the allegations and brought a
counterclaim asking the court to declare that we did not misappropriate PeriphaGen’s trade secrets or confidential information, and to further declare that
we are the rightful and sole owner of our product candidates and STAR-D platform. In addition, the Company filed a third-party complaint against two
principals of PeriphaGen, James Wechuck and David Krisky, alleging breach of contract and seeking contribution and indemnification from them in the
event PeriphaGen is awarded damages.

On March 9, 2022, the court officially ordered the parties to attend mediation on March 11, 2022. During the course of the mediation process, the

parties were able to exchange information, allowing the parties to value their positions. On March

F-15

Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

12, 2022, the Company entered into a binding term sheet to settle the dispute. In April 2022, the Company entered into a final settlement agreement and
paid PeriphaGen an upfront payment of $25.0 million on April 28, 2022 for: (i) the release of all claims in the trade secret litigation with PeriphaGen; (ii)
the  acquisition  of  certain  PeriphaGen  assets,  and  (iii)  the  grant  of  a  license  by  PeriphaGen  for  dermatological  applications.  Upon  approval  of  the
Company's  first  product  by  the  U.S.  Food  and  Drug  Administration,  the  Company  will  pay  PeriphaGen  an  additional  $12.5  million,  followed  by  three
additional $12.5 million contingent milestone payments upon reaching $100.0 million in total cumulative sales, $200.0 million in total cumulative sales and
$300.0 million in total cumulative sales. As defined in the settlement agreement, cumulative sales shall include all revenue from sales of the Company
products by the Company and its affiliates and licensees, as reported by the Company in its annual Form 10-K filings. If all milestones are achieved, the
total consideration for settling the dispute, acquiring certain assets, and granting of a license from PeriphaGen will be $75.0 million.

The  Company  recorded  the  $25.0  million  within  litigation  settlement  expense  on  the  consolidated  statements  of  operations  for  the  year  ended
December 31, 2022. The additional contingent milestone payments were not deemed probable due to uncertainty in the achievement of these milestones as
of December 31, 2022, and therefore no additional accrual has been recorded.

The  Company  has  received  $1.1  million  and  $1.6  million  of  insurance  proceeds  during  fiscal  years  ending  December  31,  2022  and  2021,
respectively. Additionally, the Company had outstanding receivables of zero and $560 thousand as of December 31, 2022 and 2021, respectively, recorded
within  prepaid  expenses  and  other  current  assets  on  the  consolidated  balance  sheets,  as  management  determined  that  the  amounts  were  probable  of
collection.  The  reimbursements  have  been  recorded  as  an  offset  to  our  legal  fees  included  in  general  and  administrative  expenses  on  the  consolidated
statements of operations and within operating activities on the consolidated statements of cash flows.

7.    Leases

Lease Agreements

In May 2016, the Company signed an operating lease for laboratory and office space in Pittsburgh, Pennsylvania that commenced in June 2016
and  was  scheduled  to  expire  in  October  2017  (the  “2016  Lease”).  The  2016  Lease  has  been  amended  several  times  to  increase  the  area  leased,  which
currently consists of approximately 54,000 square feet and includes the commercial scale CGMP-compliant manufacturing facility, (“ANCORIS”). As a
result of the lease amendments, the 2016 Lease expiration date was extended to October 2031. In September 2022, the Company amended the 2016 Lease
(“Short-Term Amendment”) to add a short-term lease for additional office space that commenced in October 2022 and expires on September 2023. The
Short-Term  Amendment  increased  the  area  leased  by  approximately  7,000  square  feet  through  September  2023.  Due  to  the  short-term  nature  of  this
amendment and the Company's lease accounting policy, the Company did not record a right-of-use asset or corresponding lease liability.

In December 2019, the Company entered into a lease agreement for a second commercial gene therapy facility, (“ASTRA”), in the Pittsburgh,
Pennsylvania area (“ASTRA lease”) with Northfield I, LLC (the “Landlord”, “Northfield”, or “Lessor”) with an initial lease term that expired on October
2035. The ASTRA lease contained an option (“Purchase Option”) to purchase the building, related improvements and take corresponding assignment of the
Landlord's rights under its existing Ground Lease (the “Ground Lease”).

In October 2020, the Company was provided with notice that the initial delivery conditions of the building had been met, including completion of
the  building  shell,  interior  slab,  and  exterior  doors,  and  the  Company  gave  the  Landlord  notice  of  its  intent  to  purchase  ASTRA  for  approximately
$9.4 million, subject to the parties entering into a commercially reasonable purchase and sale agreement. As a result of the Company's ability to exercise its
option to purchase ASTRA, the Company obtained control over the construction in progress of ASTRA. The Company recorded a $10 million CIP asset
and a corresponding build-to-suit lease liability related to the costs incurred by the Landlord, offset by the previous cash contributions of $2.4 million.

F-16

Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

In January 2021, the Company entered into a Purchase and Sale Agreement (“PSA”) for ASTRA with Northfield related to the purchase option
exercised by the Company in October 2020, for a purchase price of $9.4 million. The Company held approximately $1.5 million on deposit with Northfield
under the existing lease agreement and applied this deposit as a credit against the purchase price at closing. In February 2021, Northfield delivered the
space as substantially complete and made the space available for access by the Company, thus triggering lease commencement. As a result, the Company
concluded that this transaction did not qualify for sale-leaseback accounting because it did not meet the definition of a sale. As control did not transfer to
the Lessor at lease commencement, the transaction continued to be accounted for as construction in progress and a financing obligation. In March 2021, the
purchase  closed  and  the  Company  determined  that  reclassification  of  the  construction  in  progress  to  buildings  and  leasehold  improvements  was  not
appropriate as the interior of the building was not yet ready for its intended use. From construction completion to the closing of the purchase, the Company
recognized interest expense to accrete the financial obligation to a balance that equaled the cash consideration that was paid upon the close of purchase.
The building continues to be held under construction-in-progress as of December 31, 2022. The interior of the building is currently under construction and
is  expected  to  be  completed  and  validated  in  2023.  For  more  information  about  the  expected  construction  costs  associated  with  ASTRA,  see  “ASTRA
Contractual Obligations” below.

As  part  of  the  transaction,  the  Company  also  became  the  accounting  owner  of  the  Ground  Lease,  due  to  obtaining  control  over  ASTRA,  and
recorded the applicable operating right-of-use asset and corresponding lease liability in October 2020. When the PSA was finalized, the Company took
assignment of the Lessor's Ground Lease, in accordance with the Purchase Option, of which lease payments are based on annual payments of $82 thousand,
and are subject to a cumulative 10% escalation clause every 5 years through 2071.

In December 2021, the Company entered into a 3 year lease agreement for the Boston, Massachusetts office that commenced in January 2022 and

expires in January 2025.

In  May  2022,  the  Company  entered  into  a  16  month  lease  agreement  for  the  Zug,  Switzerland  office  that  commenced  in  September  2022  and

expires December 2023.

As of December 31, 2022, future minimum commitments under the Company’s operating leases were as follows (in thousands):

2023
2024
2025
2026
2027
Thereafter

Future minimum operating lease payments
Less: Interest

Present value of lease liability

Supplemental balance sheet information related to leases is as follows:

Operating leases:

Right-of-use assets
Current portion of lease liability
Lease liability

Total lease liability

Weighted average remaining lease term, in years
Weighted average discount rate

F-17

Operating Leases

1,648 
1,539 
1,277 
1,277 
1,300 
10,762 
17,803 
8,870 
8,933 

$

$

$

December 31,
2022

December 31,
2021

$

$

8,042 
1,561 
7,372 
8,933 

$

$

12.5
9.4 %

7,228 
1,041 
6,983 
8,024 

14.4
9.5 %

 
 
 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

The components of the Company's lease expense are as follows:

Lease cost:

Operating lease expense
Variable lease expense

Total lease expense

8.    Capitalization

Sale of Common Stock

2022

Years Ended December 31,
2021

2020

$

$

1,532  $
226 
1,758  $

1,275  $
160 
1,435  $

767 
57 
824 

In December 2021, the Company completed an underwritten public offering of 2,866,667 shares of its common stock, including 200,000 shares
purchased by the underwriters pursuant to their option to purchase additional shares, at $75.00 per share. Net proceeds to the Company from the offering
were $201.9 million after deducting underwriting discounts and commissions of approximately $12.9 million, and other offering expenses payable by the
Company of $227 thousand.

In February 2021, the Company completed an underwritten public offering of 2,211,538 shares of its common stock, including 288,461 shares
purchased by the underwriters pursuant to their option to purchase additional shares, at $65.00 per share. Net proceeds to the Company from the offering
were $134.9 million after deducting underwriting discounts and commissions of approximately $8.6 million, and other offering expenses payable by the
Company of $198 thousand.

In May 2020, the Company completed a public offering of 2,275,000 shares of its common stock to the public at $55.00 per share. Net proceeds to
the  Company  from  the  offering  were  $117.2  million  after  deducting  underwriting  discounts  and  commissions  of  approximately  $7.5  million,  and  other
offering expenses payable by the Company of approximately $463 thousand.

ATM Program

The Company sells shares of common stock from time to time pursuant to its previously executed sales agreement (the "Sales Agreement") with
Cowen and Company, LLC (“Cowen”) with respect to an at-the-market equity offering program (“ATM”) finalized on December 31, 2020, under which
Cowen acts as the Company's agent and/or principal and may issue and sell from time to time, during the term of the Sales Agreement, shares of common
stock having an aggregate offering price up to $150.0 million (“Placement Shares”). The issuance and sale of the Placement Shares by the Company under
the Sales Agreement are made pursuant to the Company's effective “shelf” registration statement on Form S-3. During 2021, the Company issued and sold
262,500 shares of common stock at a weighted average price of $66.50 per share for net proceeds of $16.9 million after deducting selling commissions of
approximately $524 thousand. During the year ended December 31, 2022, the Company issued and sold 434,782 shares of common stock at a weighted
average price of $69.00 per share for net proceeds of $29.1 million after deducting selling commissions of approximately $900 thousand, resulting in a
remaining $102.5 million available for issuance under the ATM Program.

9.    Stock-Based Compensation

Stock Options

In  2017,  the  Company  adopted  the  2017  IPO  Stock  Plan  (the  “Plan”),  which  governs  the  issuance  of  stock  options  to  employees,  certain  non-
employee consultants, and directors. Initially, the Company reserved 900 thousand shares for issuance under the Plan with an initial sublimit for incentive
stock options of 900 thousand shares. On an annual basis, the amount of shares available for issuance under the Plan increases by an amount equal to four
percent of the total outstanding shares as of the last day of the preceding calendar year. The sublimit of incentive stock options is not subject to the increase.

Options granted to employees and non-employees vest ratably over a four-year period and stock options granted to directors of the company vest

ratably over one-year to three-year periods. Stock options have a life of ten years.

The Company granted 2,130,500 and 1,422,450 stock options to employees, non-employees, and directors during the years ended December 31,

2022 and 2021, respectively.

F-18

Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

The following table summarizes the Company’s stock option activity:

Balance at January 1, 2021

Granted
Exercised
Cancelled or forfeited
Expired

Balance at December 31, 2021

Granted
Exercised
Cancelled or forfeited
Expired

Balance at December 31, 2022
Exercisable at December 31, 2022

Stock
Options
Outstanding

Weighted-
average
Exercise
Price

853,614  $

1,422,450 
(54,260)
(175,750)
(2,875)
2,043,179  $

2,130,500 
(138,855)
(438,892)
(13,751)
3,582,181  $

666,886  $

40.31 
66.88 
38.12 
61.35 
75.82 
57.00 

64.14 
50.47 
59.22 
78.80 
61.50 

49.20 

Weighted-
average
Remaining
Contractual
Life (Years)

Aggregate
Intrinsic
Value
(In thousands) (1)

9.0 $

16,804 

9.0 $

31,331 

8.7 $

7.5 $

64,880 

20,055 

(1)

Aggregate intrinsic value represents the difference between the closing stock price of our common stock on December 31, 2022 and the exercise price of outstanding in-the-money
options.

The total intrinsic value (the amount by which the fair market value exceeded the exercise price) of stock options exercised during the years ended

December 31, 2022 and 2021 was $2.9 million and $1.3 million, respectively.

The  weighted-average  grant-date  fair  value  per  share  of  options  granted  to  employees,  non-employees,  and  directors  during  the  years  ended

December 31, 2022 and 2021 was $44.50 and $43.05, respectively.

There was $104.4 million of unrecognized stock-based compensation expense related to employees’, non-employees’, and directors’ awards that is

expected to be recognized over a weighted-average period of 2.9 years as of December 31, 2022.

The  Company  has  recorded  aggregate  stock-based  compensation  expense  related 

to 

the 

issuance  of  stock  option  awards 

in

the consolidated statements of operations for the years ended December 31, 2022, 2021, and 2020 as follows (in thousands):

Research and development
General and administrative
Total stock-based compensation

Years Ended December 31,

2022

2021

2020

$

$

7,897  $

23,551 
31,448  $

3,434  $

10,235 
13,669  $

994 
2,278 
3,272 

We capitalize the portion of stock-based compensation that relates to work performed on the construction of manufacturing facilities. There was
$551 thousand, $284 thousand, and $34 thousand of stock-based compensation that was capitalized in the years ended December 31, 2022, 2021, 2020,
respectively.

The fair value of options granted was estimated at the date of grant using the Black-Scholes valuation model with the following weighted-average

assumptions for the years ended December 31, 2022, 2021, and 2020:

Expected stock price volatility
Expected term of the award (years)
Risk-free interest rate
Weighted average exercise price
Forfeiture Rate
Dividend Yield

Years Ended December 31,

2022

2021

2020

78 %
6.2
2.42 %
64.14 

— %
— %

$

72 %
6.2
1.10 %
66.88 

— %
— %

$

75 %
6.2
0.64 %
47.29 
14.74 %
— %

$

F-19

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

Restricted Stock Awards

Restricted  stock  awards  (“RSAs”)  granted  to  employees  vest  ratably  over  a  four-year  period.  The  Company  granted  zero  and  98,800  RSAs  to

employees of the Company during the year ended December 31, 2022 and 2021 respectively.

The following table summarizes the Company’s RSA activity:

Non-vested RSAs as of December 31, 2021

Granted
Vested
Surrendered or forfeited

Non-vested RSAs as of December 31, 2022

Number of Shares

Weighted Average
Grant Date
Fair Value

98,800  $
— 
(14,321)
(17,879)
66,600  $

78.89 
— 
78.89 
78.89 
78.89 

There was $3.8 million of unrecognized stock-based compensation expense related to employees’ awards that is expected to be recognized over a

weighted-average period of 2.2 years as of December 31, 2022.

The  Company  recorded  the  following  stock-based  compensation  expense  related  to  RSAs  within  general  and  administrative  expenses  in  the

accompanying consolidated statements of operations (in thousands):

General and administrative
Total stock-based compensation

2022

Years Ended December 31,
2021

2020

$
$

1,782  $
1,782  $

1,650  $
1,650  $

— 
— 

Shares  remaining  available  for  grant  under  the  Company's  stock  incentive  plan  were  469,616,  with  a  remaining  sublimit  for  incentive  stock

options of 5,581, at December 31, 2022.

10.    Income Taxes

The Company did not record a current or deferred income tax expense or benefit for the years ended December 31, 2022 and 2021 due to the
valuation allowance position. A reconciliation of income tax (benefit) expense computed at the statutory federal and state income tax rate for the year to
income tax (benefit) expense as reflected in our financial statements for years ended December 31, 2022, 2021 and 2020 are as follows (in thousands):

Federal income tax (benefit) at statutory rate
Change in valuation allowance
State income tax expense net of federal benefit
Credits
Other non-deductible expenses
Other

Total tax expense (benefit)

Years Ended December 31,

2022

2021

2020

$

$

(29,395) $
39,781 
(10,438)
(1,736)
2,182 
(394)

—  $

(14,578) $
20,689 
(5,436)
(1,295)
675 
(55)
—  $

(6,752)
11,112 
(2,632)
(887)
(216)
(625)
— 

F-20

 
 
 
 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

The significant components of the Company’s deferred tax assets and liabilities as of December 31, 2022 and 2021 are as follows (in thousands):

Deferred tax assets:

Net operating loss carryforwards
Stock compensation
Lease liability
Depreciation
Accrued expenses
Capitalized costs
Credits
Unrealized loss on marketable securities

Total deferred tax assets

Valuation allowance
Deferred tax assets
Deferred tax liabilities:

Depreciation
Right-of-use assets
Prepaid expenses

Total deferred tax liabilities
Net deferred tax assets

December 31,
2022

December 31,
2021

$

$

$
$

52,569  $
7,445 
2,572 
— 
2,206 
14,124 
6,708 
192 
85,816 
(82,513)

3,303  $

(137)
(2,312)
(854)
(3,303) $
—  $

33,170 
3,906 
2,344 
679 
817 
884 
3,607 
49 
45,456 
(42,732)
2,724 

— 
(2,111)
(613)
(2,724)
— 

The Company has evaluated the positive and negative evidence bearing upon the realizability of its deferred tax assets. Based on the Company’s
history  of  operating  losses,  the  Company  has  concluded  that  it  is  not  more  likely  than  not  that  the  benefit  of  its  deferred  tax  assets  will  be  realized.
Accordingly, the Company has provided a full valuation allowance for deferred tax assets as of December 31, 2022 and 2021.

As of December 31, 2022 and 2021, the Company had federal research and development credit carryforwards of approximately $2.0 million and
$2.4  million,  respectively.  The  federal  tax  credit  carryforwards  will  begin  to  expire  in  2039  if  not  utilized.  As  of  December  31,  2022  and  2021,  the
Company  also  had  orphan  drug  tax  credit  carryforwards  of  approximately  $4.4  million  and  $910  thousand,  respectively.  The  orphan  drug  tax  credit
carryforwards will begin to expire in 2038 if not utilized.

As of December 31, 2022 and 2021, the Company had state research and development credit carryforwards of approximately $457 thousand and

$321 thousand, respectively. The state tax credit carryforwards will begin to expire in 2032 if not utilized.

As of December 31, 2022, the Company had cumulative U.S. federal NOL carryforwards of approximately $177.7 million. Of this amount, $5.0
million  is  available  to  offset  future  income  tax  liabilities  and  will  expire  in  2037,  the  remaining  $172.7  million  is  available  indefinitely  to  offset  future
income tax liabilities with no expiration period.

As  of  December  31,  2022,  the  Company  had  cumulative  U.S.  state  NOL  carryforwards  of  approximately  $186.0  million.  The  state  NOLs  are

available to offset future state income tax liabilities and will begin to expire in 2037.

Under the provisions of the Internal Revenue Code, the NOL carryforwards are subject to review and possible adjustment by the Internal Revenue
Service  and  state  tax  authorities.  NOL  carryforwards  may  become  subject  to  an  annual  limitation  in  the  event  of  certain  cumulative  changes  in  the
ownership interest of significant shareholders over a three-year period in excess of 50%, as defined under Internal Revenue Code Sections 382 and 383 of
the Internal Revenue Code, respectively, as well as similar state provisions. This could limit the amount of tax attributes that can be utilized annually to
offset future taxable income or tax liabilities.

No  deferred  tax  assets  have  been  recognized  on  our  consolidated  balance  sheets  related  to  these  NOLs,  as  they  are  fully  offset  by  a  valuation
allowance. If we have previously had, or have in the future, one or more Section 382 “ownership changes,” including in connection with our initial public
offering or another offering, or if we do not generate sufficient taxable income, we may not be able to utilize a material portion of our NOLs, even if we
achieve profitability.

F-21

 
 
Krystal Biotech, Inc.
Notes to Consolidated Financial Statements — Continued

The  Company  files  income  tax  returns  in  the  United  States  at  the  federal  and  state  level  and  in  foreign  jurisdictions  in  which  the  Company
conducts business activities. The federal and state income tax returns are subject to tax examinations for the tax year ended December 31, 2019, 2020 and
2021. To the extent the Company has tax attribute carryforwards, the tax years in which the attribute was generated may still be adjusted upon examination
by the Internal Revenue Service or state tax authorities to the extent utilized in a future period. Additionally, the Company is subject to tax examinations by
taxing  authorities  in  foreign  jurisdictions  where  it  has  business  operations.  At  this  time,  the  Company  is  not  undergoing  examination  by  the  Internal
Revenue Service or any foreign taxing authorities.

11.    Subsequent Events

The  Company  evaluates  events  or  transactions  that  occur  after  the  balance  sheet  date,  but  prior  to  the  issuance  of  the  financial  statements,  to
identify matters that require disclosure. The Company concluded that no subsequent events have occurred that would require recognition or disclosure in
the consolidated financial statements.

F-22

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

As previously reported in the Company’s Current Report on Form 8-K filed on May 26, 2022, effective May 24, 2022, the Audit Committee of the
Company's  Board  of  Directors  dismissed  Mayer  Hoffman  McCann  P.C.  as  the  Company's  independent  registered  public  accounting  firm  effective
immediately  and  approved  the  engagement  of  KPMG  LLP  as  the  Company's  new  independent  registered  public  accounting  firm,  commencing  for  its
quarter  ending  June  30,  2022  and  the  Company's  fiscal  year  ending  December  31,  2022.  For  more  information,  please  refer  to  the  Company’s  Current
Report on Form 8-K filed on May 26, 2022.

Item 9A. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

Under the supervision of our Chief Executive Officer and Chief Accounting Officer, we evaluated the effectiveness of our disclosure controls and
procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) as of December 31, 2022.  Based on that evaluation, our Chief Executive
Officer and Chief Accounting Officer have concluded that our disclosure controls and procedures were effective as of December 31, 2022 to ensure that
information required to be disclosed by us in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within
the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our
Chief  Executive  Officer  and  Chief  Accounting  Officer,  as  appropriate  to  allow  timely  discussion  regarding  required  disclosures.  In  designing  and
evaluating our disclosure controls and procedures, management recognizes that any disclosure controls and procedures, no matter how well designed and
operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures
must reflect the fact that there are resource constraints and that management is required to apply its judgment in evaluating the benefits of possible controls
and procedures relative to their costs.

Management’s Report on Internal Control over Financial Reporting

Our  management  is  responsible  for  establishing  and  maintaining  adequate  internal  control  over  financial  reporting,  as  such  term  is  defined  in
Exchange Act Rules 13a-15(f) and 15d-15(f). Our management conducted an evaluation of the effectiveness of our internal control over financial reporting
as  of  December  31,  2022  based  on  the  criteria  established  in  Internal  Control  -  Integrated  Framework  (2013)  issued  by  the  Committee  of  Sponsoring
Organizations of the Treadway Commission.

Based on the results of its evaluation, management concluded that our internal control over financial reporting was effective as of December 31,
2022. The effectiveness of our internal control over financial reporting as of December 31, 2022 has been audited by KPMG, an independent registered
public accounting firm, as stated in their report which is included herein.

Inherent Limitations on Controls and Procedures

Our management, including the Chief Executive Officer and Chief Accounting Officer, do not expect that our disclosure controls and procedures
and our internal controls will prevent all error and all fraud. A control system, no matter how well designed and operated, can only provide reasonable
assurances that the objectives of the control system are met. The design of a control system reflects resource constraints; the benefits of controls must be
considered relative to their costs. Because there are inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that
all control issues and instances of fraud, if any, within the Company have been or will be detected. As these inherent limitations are known features of the
financial  reporting  process,  it  is  possible  to  design  into  the  process  safeguards  to  reduce,  though  not  eliminate,  these  risks.  These  inherent  limitations
include  the  realities  that  judgments  in  decision-making  can  be  faulty  and  that  breakdowns  occur  because  of  simple  error  or  mistake.  Controls  can  be
circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any
system  of  controls  is  based  in  part  upon  certain  assumptions  about  the  likelihood  of  future  events.  While  our  disclosure  controls  and  procedures  are
designed to provide reasonable assurance of achieving their objectives, there can be no assurance that any design will succeed in achieving its stated goals
under all future conditions. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with
the policies or procedures. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be
detected.

We intend to review and evaluate the design and effectiveness of our disclosure controls and procedures on an ongoing basis and to improve our
controls  and  procedures  over  time  and  to  correct  any  deficiencies  that  we  may  discover  in  the  future.  While  our  Chief  Executive  Officer  and  Chief
Accounting Officer have concluded that, as of December 31, 2022, the design of our disclosure controls and procedures, as defined in Rule 13a-15(e) under
the Exchange Act, was effective, future events affecting our business may cause us to significantly modify our disclosure controls and procedures.

F-86

Changes in Internal Control over Financial Reporting

In 2021, we implemented the first phase of our enterprise resource planning software, Microsoft Dynamics D365 (“Dynamics”), as part of a plan
to integrate and upgrade our systems and processes. The implementation of this software is scheduled to continue in phases over a number of years as the
Company grows and as we move towards commercialization of our initial product candidate, B-VEC. As the phased implementation of this system occurs,
we expect certain changes to our processes and procedures which, in turn, will result in changes to our internal control over financial reporting. We expect
Dynamics to continue to strengthen our internal financial controls. Management will continue to evaluate and monitor our internal controls as processes
and procedures in each of the affected areas evolve. As we are still in the process of implementing these additional phases, no change in our internal control
over financial reporting occurred during the year ended December 31, 2022.

Other than as discussed above, there was no change in our internal control over financial reporting identified in connection with the evaluation
required by Rules 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the year ended December 31, 2022 that has materially affected, or is
reasonably likely to materially affect, our internal control over financial reporting.

Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors
Krystal Biotech, Inc.:

Opinion on Internal Control Over Financial Reporting

We have audited Krystal Biotech, Inc. and subsidiaries' (the Company) internal control over financial reporting as of December 31, 2022, based on criteria
established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our
opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2022, based on criteria
established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated
balance sheet of the Company as of December 31, 2022 the related consolidated statements of operations and comprehensive loss, stockholders’ equity, and
cash flows for the year ended December 31, 2022, and the related notes (collectively, the consolidated financial statements), and our report dated February
27, 2023 expressed an unqualified opinion on those consolidated financial statements.

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 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 of internal control over
financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and
testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included 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

F-87

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/ KPMG LLP

Pittsburgh, Pennsylvania
February 27, 2023

Item 9B. Other Information.

None

Item 9C. Disclosure Regarding Foreign Jurisdictions That Prevent Inspections.

Not Applicable.

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Information required by this Item is hereby incorporated by reference to our 2023 Definitive Proxy Statement, which will be filed prior to April

30, 2023..

Item 11. Executive Compensation.

Information required by this Item is hereby incorporated by reference to our 2023 Definitive Proxy Statement, which will be filed prior to April

30, 2023..

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Information required by this Item is hereby incorporated by reference to our 2023 Definitive Proxy Statement, which will be filed prior to April

30, 2023..

Item 13. Certain Relationships and Related Transactions, and Director Independence.

Information required by this Item is hereby incorporated by reference to our 2023 Definitive Proxy Statement, which will be filed prior to April

30, 2023..

Item 14. Principal Accounting Fees and Services.  

Information required by this Item is hereby incorporated by reference to our 2023 Definitive Proxy Statement, which will be filed prior to April

30, 2023..

F-88

PART IV

Item 15. Exhibits, Financial Statement Schedules.

(a)

List the following documents filed as a part of the report:
(1)

Financial statements

The response to this portion of Item 15 is set forth under Item 8 above.
(2)

Financial statement schedule.

All schedules have been omitted because they are not required or because the required information is given in the financial statements or
notes thereto set forth under Item 8 above.
(3)

Exhibits.

A list of exhibits filed with this report or incorporated herein by reference can be found in the Exhibit Index of this Report.

Exhibit Index

Exhibit
Number

3.1

3.2

4.1

4.2

4.3*
10.1#

10.2#

10.3#

10.4#

10.5#
10.6#

Description

Second Amended and Restated Certificate of Incorporation of Krystal Biotech, Inc. (incorporated by reference to Exhibit 3.1 to the
Company’s Current Report on Form 8-K, as filed with the SEC on September 25, 2017)

Amended and Restated Bylaws of Krystal Biotech, Inc. (incorporate by reference to Exhibit 3.2 to the Company’s Current Report on
Form 8-K, as filed with the SEC on September 25, 2017)

Form of Common Stock Certificate (incorporated by reference to Exhibit 4.1 to the Company’s Amendment No. 2 to the Company’s
Registration Statement on Form S-1 (Reg. No. 333-220085), as filed with the SEC on September 14, 2017)

Form of Indenture (including form of Debt Securities) (incorporated by reference to Exhibit 4.5 to the Company’s Registration
Statement on Form S-3 (Reg. No. 333-227632), as filed with the SEC on October 1, 2018)

Description of Common Stock
Indemnification Agreement by and between Krystal Biotech, Inc. and each of its directors and executive officers (incorporated by
reference to Exhibit 10.1 to the Company’s Amendment No. 2 to the Company’s Registration Statement on Form S-1 (Reg. No. 333-
220085), as filed with the SEC on September 14, 2017)

Executive Employment Agreement, effective July 1, 2017, by and between Krystal Biotech, Inc. and Krish S. Krishnan (incorporated
by reference to Exhibit 10.2 to the Company’s Amendment No. 1 to the Company’s Registration Statement on Form S-1 (Reg. No.
333-220085), as filed with the SEC on September 7, 2017)

Executive Employment Agreement, effective May 1, 2017, by and between Krystal Biotech, Inc. and Suma M. Krishnan (incorporated
by reference to Exhibit 10.3 to the Company’s Amendment No. 1 to the Company’s Registration Statement on Form S-1 (Reg. No.
333-220085), as filed with the SEC on September 7, 2017)

Executive Employment Agreement, effective January 20, 2020, by and between Krystal Biotech, Inc. and Kathryn A. Romano
(incorporated by reference to Exhibit 10.4 to the Company's Annual Report on Form 10-K, as filed with the SEC on March 1, 2021)

Executive Employment Agreement, effective May 3, 2021 by and between Krystal Biotech, Inc. and Andy Orth
Krystal Biotech, Inc. 2017 Stock Incentive Plan (incorporated by reference to Exhibit 10.6 to the Company’s Amendment No. 2 to the
Company’s Registration Statement on Form S-1 (Reg. No. 333-220085), as filed with the SEC on September 14, 2017)

89

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit
Number

10.7#

10.8#

10.9#

10.10

10.11

10.12

10.13

10.14

10.15

10.16

10.17

10.18

10.19

10.20

10.21

10.22

10.23*#

Description
Krystal Biotech, Inc. 2017 IPO Stock Incentive Plan (incorporated by reference to Exhibit 10.7 to the Company’s Amendment No. 2 to
the Company’s Registration Statement on Form S-1 (Reg. No. 333-220085), as filed with the SEC on September 14, 2017)

Form of Krystal Biotech, Inc. 2017 Stock Incentive Plan Notice of Stock Option Award (incorporated by reference to Exhibit 10.8 to
the Company’s Amendment No. 2 to the Company’s Registration Statement on Form S-1 (Reg. No. 333-220085), as filed with the
SEC on September 14, 2017)

Form of Krystal Biotech, Inc. 2017 IPO Stock Incentive Plan Notice of Stock Option Award (incorporated by reference to Exhibit 10.9
to the Company’s Amendment No. 2 to the Company’s Registration Statement on Form S-1 (Reg. No. 333-220085), as filed with the
SEC on September 14, 2017)

Lease Agreement, dated as of May 26, 2016, by and between Wharton Lender Associates, L.P. and Krystal Biotech, LLC (incorporated
by reference to Exhibit 10.10 to the Company’s Amendment No. 1 to the Company’s Registration Statement on Form S-1 (Reg. No.
333-220085), as filed with the SEC on September 7, 2017)

Second Amendment to Lease Agreement, dated as of February 27, 2017, by and between Wharton Lender Associates, L.P. and Krystal
Biotech, LLC (incorporated by reference to Exhibit 10.11 to the Company’s Amendment No. 1 to the Company’s Registration
Statement on Form S-1 (Reg. No. 333-220085), as filed with the SEC on September 7, 2017)

Investors’ Rights Agreement, dated as of August 7, 2017, by and among Krystal Biotech, Inc. and the investors listed on Schedule A
thereto (incorporated by reference to Exhibit 10.9 to Form S-1 (Reg. No. 333-220085), as filed with the SEC on August 21, 2017)

Third amendment to Lease Agreement, dated as of May 31, 2018, by and between Wharton Lender Associate, L.P. and Krystal
Biotech, Inc. (incorporated by reference to Exhibit 10.13 to the Company's Annual Report on Form 10-K, as filed with the SEC on
March 1, 2021)
Fourth amendment to Lease Agreement, dated as of October 22, 2018, by and between Wharton Lender Associate, L.P. and Krystal
Biotech, Inc. (incorporated by reference to Exhibit 10.14 to the Company's Annual Report on Form 10-K, as filed with the SEC on
March 1, 2021)
Fifth amendment to Lease Agreement, dated as of December 10, 2018, by and between Wharton Lender Associate, L.P. and Krystal
Biotech, Inc. (incorporated by reference to Exhibit 10.15 to the Company's Annual Report on Form 10-K, as filed with the SEC on
March 1, 2021)
Sixth amendment to Lease Agreement and first amendment to storage space agreement, dated as of January 13, 2021, by and between
Wharton Lender Associates, L.P. and Krystal Biotech, Inc.
Seventh amendment to Lease Agreement, dated as of May 11, 2021, by and between Wharton Lender Associates, L.P. and Krystal
Biotech, Inc.
Eighth amendment to Lease Agreement, dated as of July 21, 2021, by and between Wharton Lender Associates, L.P. and Krystal
Biotech, Inc.
Ninth amendment to Lease Agreement, dated as of January 4, 2022, by and between Wharton Lender Associates, L.P. and Krystal
Biotech, Inc.
Purchase and Sale Agreement, dated January 29, 2021, by and between Krystal Biotech, Inc. and Northfield I, LLC. (incorporated by
reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, as filed with the SEC on February 2, 2021)
Standard Form of Contract for Construction and the corresponding General Conditions of the Contract for Construction with The
Whiting-Turner Contracting Company, dated June 30, 2021 (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly
Report on Form 10-Q, as filed with the SEC on August 9, 2021)
Guaranteed Maximum Price Amendment to Standard Form of Contract for Construction and the corresponding General Conditions of
the Contract for Construction with The Whiting-Turner Contracting Company dated September 13, 2021 (incorporated by reference to
Exhibit 10.1 to the Company’s Current Report on Form 8-K, as filed with the SEC on September 16, 2021)
Form of Krystal Biotech, Inc. 2017 IPO Stock Incentive Plan Notice of Restricted Stock Award and Restricted Stock Award
Agreement

90

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
16.1

21.1*
23.1*
23.2*
31.1*
31.2*
32.1*

101

104

Letter to Securities and Exchange Commission from Mayer Hoffman McCann P.C. dated May 26, 2022 (incorporated by reference to
Exhibit 16.1 to the Company’s Current Report on Form 8-K, as filed with the SEC on May 26, 2022).
Subsidiaries of Krystal Biotech, Inc.
Consent of KPMG LLP
Consent of Mayer Hoffman McCann P.C.
Certification of Periodic Report by Chief Executive Officer under Section 302 of the Sarbanes-Oxley Act of 2002.
Certification of Periodic Report by Chief Accounting Officer under Section 302 of the Sarbanes-Oxley Act of 2002.
Certification of Chief Executive Officer and Chief Accounting Officer Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002.
(i) XBRL Instance Document, (ii) XBRL Taxonomy Extension Schema Document, (iii) XBRL Taxonomy Extension Calculation
Linkbase Document, (iv) XBRL Taxonomy Extension Definition Linkbase Document, (v) XBRL Taxonomy Extension Label Linkbase
Document, (vi) XBRL Taxonomy Extension Presentation Linkbase Document.
Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).

*    Filed herewith.
#    Indicates a management contract or compensatory plan or arrangement.

Item 16. Form 10-K Summary.

The Company has elected to not include a summary.

91

 
 
 
 
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report

to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Pittsburgh, State of Pennsylvania, on February 27, 2023.

SIGNATURES

KRYSTAL BIOTECH, INC.

By:

  /s/ Krish S. Krishnan
  Krish S. Krishnan

President and Chief Executive Officer

By:

  /s/ Kathryn A. Romano
  Kathryn A. Romano

Chief Accounting Officer

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Krish S. Krishnan
and/or Kathryn A. Romano as his or her true and lawful attorney-in-fact and agent, with the full power of substitution, for him or her and in his or her
name, place or stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Annual Report on Form 10-K,
and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said
attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the
premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and
agent, or their, 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.

92

 
 
 
 
 
 
 
 
Signature

/s/ Krish S. Krishnan

Krish S. Krishnan

/s/ Kathryn A. Romano

Kathryn A. Romano

/s/ Suma M. Krishnan

Suma M. Krishnan

/s/ Daniel S. Janney
Daniel S. Janney

/s/ Dino A. Rossi
Dino A. Rossi

 /s/ Kirti Ganorkar
Kirti Ganorkar

/s/ Julian Gangolli
Julian Gangolli

/s/ Chris Mason
Chris Mason

/s/ E. Rand Sutherland
E. Rand Sutherland

Title

President and Chief Executive Officer and Director
(Principal Executive Officer)

Chief Accounting Officer (Principal Financial
Officer)

President, R&D and Director

   Director

   Director

   Director

Director

Director

Director

93

Date

February 27, 2023

February 27, 2023

February 27, 2023

February 27, 2023

February 27, 2023

February 27, 2023

February 27, 2023

February 27, 2023

February 27, 2023

  
  
  
  
 
 
 
 
 
 
 
Exhibit 4.3

General

DESCRIPTION OF COMMON STOCK

Our authorized capital stock consists of 80,000,000 shares of common stock, $0.00001 par value per share, and 20,000,000 shares of preferred stock,
$0.00001 par value per share. Our common stock is registered under Section 12(b) of the Securities Exchange Act of 1934, as amended (the “Exchange
Act”). We have no other securities registered under Section 12 of the Exchange Act.

The following description summarizes the most important terms of our common stock. Because it is only a summary, it does not contain all the information
that may be important to you. The description is intended as a summary, and is qualified in its entirety by reference to our second amended and restated
certificate of incorporation (our “Certificate of Incorporation”) and our amended and restated bylaws (our “Bylaws”). For a complete description, you
should refer to our Certificate of Incorporation and Bylaws.

Common Stock

Dividend Rights

The holders of our common stock are entitled to receive dividends out of funds legally available if our board of directors, in its discretion, determines to
issue dividends and then only at the times and in the amounts that our board of directors may determine.

Voting Rights

Holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of stockholders. We have not provided for
cumulative voting for the election of directors in our Certificate of Incorporation. Accordingly, holders of a majority of the shares of our common stock will
be able to elect all of our directors. Our Certificate of Incorporation has established a classified board of directors, divided into three classes with staggered
three-year terms. Only one class of directors will be elected at each annual meeting of our stockholders, with the other classes continuing for the remainder
of their respective three-year terms.

No Preemptive or Similar Rights

Our common stock is not entitled to preemptive rights, and is not subject to conversion, redemption or sinking fund provisions.

Right to Receive Liquidation Distributions

Upon our liquidation, dissolution or winding-up, the assets legally available for distribution to our stockholders would be distributable ratably among the
holders of our common stock at that time, subject to prior satisfaction of all outstanding debt and liabilities.

Anti-Takeover Provisions

The provisions of Delaware law, our Certificate of Incorporation and our Bylaws could have the effect of delaying, deferring or discouraging another
person from acquiring control of our company. These provisions, which are summarized below, may have the effect of discouraging takeover bids. They
are also designed, in part, to encourage persons seeking to acquire control of us to negotiate first with our board of directors. We believe that the benefits of
increased protection of our potential ability to negotiate with an unfriendly or unsolicited acquirer outweigh the disadvantages of discouraging a proposal to
acquire us because negotiation of these proposals could result in an improvement of their terms.

Delaware Law

We are subject to the provisions of Section 203 of the Delaware General Corporation Law (the “DGCL”), regulating corporate takeovers. In general,
Section 203 of the DGCL prohibits a publicly held Delaware corporation from engaging in a business combination with an interested stockholder for a
period of three years following the date on which the person became an interested stockholder unless:

•

prior to the date of the transaction, the board of directors of the corporation approved either the business combination or the transaction which
resulted in the stockholder becoming an interested stockholder;

•

•

the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding
for purposes of determining the voting stock outstanding, but not the outstanding voting stock owned by the interested stockholder: (i) shares
owned by persons who are directors and also officers; and (ii) shares owned by employee stock plans in which employee participants do not have
the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or

at or subsequent to the date of the transaction, the business combination is approved by the board of directors of the corporation and authorized at
an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least 66.67% of the outstanding voting stock
that is not owned by the interested stockholder.

Generally, a business combination includes a merger, asset or stock sale, or other transaction or series of transactions together resulting in a financial
benefit to the interested stockholder. An interested stockholder is a person who, together with affiliates and associates, owns or, within three years prior to
the determination of interested stockholder status, did own 15% or more of a corporation’s outstanding voting stock. We expect the existence of this
provision to have an anti-takeover effect with respect to transactions our board of directors does not approve in advance. We also anticipate that Section
203 of the DGCL may also discourage attempts that might result in a premium over the market price for the shares of common stock held by stockholders.

Second Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws Provisions

Our Certificate of Incorporation and our Bylaws include a number of provisions that could deter hostile takeovers or delay or prevent changes in control of
our company, including the following:

•

•

•

•

•

Board of Directors Vacancies. Our Certificate of Incorporation and Bylaws authorizes only our board of directors to fill vacant directorships,
including newly created seats. In addition, the number of directors constituting our board of directors may only be set by a resolution adopted by a
majority vote of our entire board of directors. These provisions would prevent a stockholder from increasing the size of our board of directors and
then gaining control of our board of directors by filling the resulting vacancies with its own nominees. This makes it more difficult to change the
composition of our board of directors but promotes continuity of management.

Classified Board. Our Certificate of Incorporation and Bylaws provide that our board of directors will be classified into three classes of directors,
each with staggered three-year terms. A third party may be discouraged from making a tender offer or otherwise attempting to obtain control of us
as it is more difficult and time consuming for stockholders to replace a majority of the directors on a classified board of directors.

Stockholder Action; Special Meetings of Stockholders. Our Certificate of Incorporation provides that our stockholders may not take action by
written consent, but may only take action at annual or special meetings of our stockholders. As a result, a holder controlling a majority of our
capital stock may not amend our restated bylaws or remove directors without holding a meeting of our stockholders called in accordance with our
restated bylaws. Further, our Certificate of Incorporation and Bylaws provide that special meetings of our stockholders may be called only by a
majority of our board of directors, the chairman of our board of directors, or our Chief Executive Officer, thus prohibiting a stockholder from
calling a special meeting. These provisions might delay the ability of our stockholders to force consideration of a proposal or for stockholders
controlling a majority of our capital stock to take any action, including the removal of directors.

Advance Notice Requirements for Stockholder Proposals and Director Nominations. Our Bylaws provides advance notice procedures for
stockholders seeking to bring business before our annual meeting of stockholders or to nominate candidates for election as directors at our annual
meeting of stockholders. Our Bylaws also specifies certain requirements regarding the form and content of a stockholder’s notice. These
provisions may preclude our stockholders from bringing matters before our annual meeting of stockholders or from making nominations for
directors at our annual meeting of stockholders if the proper procedures are not followed. We expect that these provisions may also discourage or
deter a potential acquirer from conducting a solicitation of proxies to elect the acquirer’s own slate of directors or otherwise attempting to obtain
control of our company.

No Cumulative Voting. The DGCL provides that stockholders are not entitled to the right to cumulate votes in the election of directors unless a
corporation’s certificate of incorporation provides otherwise. Our Certificate of Incorporation does not provide for cumulative voting.

• Directors Removed Only for Cause. Our Certificate of Incorporation provides that stockholders may remove directors only for cause and only by

the affirmative vote of the holders of at least two-thirds of our outstanding common stock.

•

•

•

Amendment of Charter Provisions. Any amendment of the above expected provisions in our Certificate of Incorporation requires approval by
holders of at least two-thirds of our outstanding common stock.

Issuance of Undesignated Preferred Stock. Our board of directors has the authority, without further action by the stockholders, to issue up to
20,000,000 shares of undesignated preferred stock with rights and preferences, including voting rights, designated from time to time by our board
of directors. The existence of authorized but unissued shares of preferred stock will enable our board of directors to render more difficult or to
discourage an attempt to obtain control of us by means of a merger, tender offer, proxy contest or other means.

Choice of Forum. Our Certificate of Incorporation provides that the Court of Chancery of the State of Delaware will be the exclusive forum for:
any derivative action or proceeding brought on our behalf; any action asserting a breach of fiduciary duty; any action asserting a claim against us
arising pursuant to the DGCL, our Certificate of Incorporation or our Bylaws; any action to interpret, apply, enforce or determine the validity of
our Certificate of Incorporation or our Bylaws; or any action asserting a claim against us that is governed by the internal affairs doctrine. The
enforceability of similar choice of forum provisions in other companies’ certificates of incorporation has been challenged in legal proceedings, and
it is possible that a court could find these types of provisions to be inapplicable or unenforceable.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Computershare Trust Company, N.A. The transfer agent’s address is 150 Royall Street, Canton,
MA 02021, and its telephone number is 1-800-962-4284. Our shares of common stock were issued in uncertificated form only, subject to limited
circumstances.

NASDAQ Capital Market Listing

Our common stock is listed on The NASDAQ Capital Market under the symbol “KRYS.”

Exhibit 10.23

KRYSTAL BIOTECH, INC. 2017 IPO STOCK INCENTIVE PLAN

NOTICE OF RESTRICTED STOCK BONUS AWARD

Grantee’s Name and Address:        

You (the “Grantee”) have been granted shares of Common Stock of the Company (the “Award”), subject to the terms and conditions of this Notice of
Restricted Stock Bonus Award (the “Notice”), the Krystal Biotech, Inc. 2017 IPO Stock Incentive Plan, as amended from time to time (the “Plan”), and the
Restricted Stock Bonus Award Agreement (the “Agreement”) attached hereto, as follows. Unless otherwise provided herein, the terms in this Notice shall
have the same meaning as those defined in the Plan.

Award Number        

Date of Award    

Vesting Commencement Date    

Total Number of Shares of Common 
Stock Awarded (the “Shares”)        

Vesting Schedule:

Subject to the Grantee’s Continuous Service and other limitations set forth in this Notice, the Agreement and the Plan, the Shares will “vest” in accordance
with the following schedule (the “Vesting Schedule”):

The unvested Award shall vest ratably over a four year period with one-fourth of the Award vesting on the Vesting Commencement Date and one-
fourth vesting on each anniversary thereafter until all Shares have vested.

During any authorized leave of absence, the vesting of the Shares as provided in this schedule shall be suspended after the leave of absence exceeds a
period of three (3) months. Vesting of the Shares shall resume upon the Grantee’s termination of the leave of absence and return to service to the Company
or a Related Entity. The Vesting Schedule of the Shares shall be extended by the length of the suspension.

In the event of the Grantee’s change in status from Employee, Director or Consultant to any other status of Employee, Director or Consultant, the Shares
shall continue to vest in accordance with the Vesting Schedule set forth above.

For purposes of this Notice and the Agreement, the term “vest” shall mean, with respect to any Shares, that such Shares are no longer subject to forfeiture
to the Company. Shares that have not vested are deemed “Restricted Shares.” If the Grantee would become vested in a fraction of a Restricted Share, such
Restricted Share shall not vest until the Grantee becomes vested in the entire Share.

Vesting shall cease upon the date of termination of the Grantee’s Continuous Service for any reason, including death or Disability. In the event the
Grantee’s Continuous Service is terminated for any reason, including death or Disability, any Restricted Shares held by the Grantee immediately following
such termination of Continuous Service shall be deemed reconveyed to the Company and the Company shall thereafter be the legal and beneficial owner of
the Restricted Shares and shall have all rights and interest in or related thereto without further action by the Grantee. The foregoing forfeiture provisions set
forth in this Notice as to Restricted Shares shall apply to the new capital stock or other property (including cash paid other than as a regular cash dividend)
received in exchange for the Shares in consummation of any transaction described in Section 11 of the Plan and such stock or property shall be

    1

 
        
        
 
 
deemed Additional Securities (as defined in the Agreement) for purposes of the Agreement, but only to the extent the Shares are at the time covered by
such forfeiture provisions.

The Award shall be subject to the provisions of Section 11 of the Plan in the event of a Corporate Transaction or Change in Control.

IN WITNESS WHEREOF, the Company and the Grantee have executed this Notice and agree that the Award is to be governed by the terms and conditions
of this Notice, the Plan and the Agreement.

Krystal Biotech, Inc.,
a Delaware corporation

By:        
Title:        

THE GRANTEE ACKNOWLEDGES AND AGREES THAT THE SHARES SHALL VEST, IF AT ALL, ONLY DURING THE PERIOD OF THE
GRANTEE’S CONTINUOUS SERVICE OR AS OTHERWISE SPECIFICALLY PROVIDED HEREIN (NOT THROUGH THE ACT OF BEING
HIRED, BEING GRANTED THIS AWARD OR ACQUIRING SHARES HEREUNDER). The GRANTEE FURTHER ACKNOWLEDGES AND
AGREES THAT NOTHING IN THIS NOTICE, THE AGREEMENT, OR THE PLAN SHALL CONFER UPON THE GRANTEE ANY RIGHT WITH
RESPECT TO FUTURE AWARDS OR CONTINUATION OF THE GRANTEE’S CONTINUOUS SERVICE, NOR SHALL IT INTERFERE IN ANY
WAY WITH THE GRANTEE’S RIGHT OR THE RIGHT OF THE COMPANY OR RELATED ENTITY TO WHICH THE GRANTEE PROVIDES
SERVICES TO TERMINATE THE GRANTEE’S CONTINUOUS SERVICE AT ANY TIME, WITH OR WITHOUT CAUSE, AND WITH OR
WITHOUT NOTICE. THE GRANTEE ACKNOWLEDGES THAT UNLESS THE GRANTEE HAS A WRITTEN EMPLOYMENT AGREEMENT
WITH THE COMPANY TO THE CONTRARY, THE GRANTEE’S STATUS IS AT WILL.

The Grantee acknowledges receipt of a copy of the Plan and the Agreement and represents that he or she is familiar with the terms and provisions thereof,
and hereby accepts the Award subject to all of the terms and provisions hereof and thereof. The Grantee has reviewed this Notice, the Agreement and the
Plan in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Notice and fully understands all provisions of this
Notice, the Agreement and the Plan. The Grantee hereby agrees that all questions of interpretation and administration relating to this Notice, the Plan and
the Agreement shall be resolved by the Administrator in accordance with Section 12 of the Agreement. The Grantee further agrees to the venue selection
and waiver of a jury trial in accordance with Section 13 of the Agreement. The Grantee further agrees to notify the Company upon any change in the
residence address indicated in this Notice.

The Grantee further acknowledges that, from time to time, the Company may be in a “blackout period” and/or subject to applicable federal securities laws
that could subject the Grantee to liability for engaging in any transaction involving the sale of the Shares. The Grantee further acknowledges and agrees
that, prior to the sale of any Shares acquired under the Award, it is the Grantee’s responsibility to determine whether or not the sale of the Shares will
subject the Grantee to liability under insider trading rules or other applicable federal securities laws.

The Company may, in its sole discretion, decide to deliver this Notice, the Agreement, the Plan and the Plan prospectus (collectively, the “Plan
Documents”) to the Grantee by electronic means or request the Grantee’s consent to participate in the Plan by electronic means. The Grantee hereby agrees
to Company’s provision to the Grantee of these documents by electronic delivery and agrees to participate in the Plan through an on-line or electronic
system established and maintained by the Company or a third party designated by the Company.

The Grantee acknowledges that the Grantee has access to the Company’s intranet and has either received electronic or paper copies of the Plan Documents.

Dated:            Signed:        

    2

 
 
KRYSTAL BIOTECH, INC. 2017 IPO STOCK INCENTIVE PLAN

RESTRICTED STOCK BONUS AWARD AGREEMENT

1.
Issuance of Shares. Krystal Biotech, Inc., a Delaware corporation (the “Company”), hereby issues to the Grantee (the “Grantee”) named in the
Notice of Restricted Stock Bonus Award (the “Notice”), the Total Number of Shares of Common Stock Awarded set forth in the Notice (the “Shares”),
subject to the Notice, this Restricted Stock Bonus Award Agreement (the “Agreement”) and the terms and provisions of the Company’s 2017 IPO Stock
Incentive Plan (the “Plan”), as amended from time to time, which are incorporated herein by reference. Unless otherwise defined herein, the terms defined
in the Plan shall have the same defined meanings in this Agreement. All Shares issued hereunder will be deemed issued to the Grantee as fully paid and
nonassessable shares, and the Grantee will have the right to vote the Shares at meetings of the Company’s stockholders. The Company shall pay any
applicable stock transfer taxes imposed upon the issuance of the Shares to the Grantee hereunder.

Transfer Restrictions. The Shares issued to the Grantee hereunder may not be sold, transferred by gift, pledged, hypothecated, or otherwise

2.
transferred or disposed of by the Grantee prior to the date when the Shares become vested pursuant to the Vesting Schedule set forth in the Notice. Any
attempt to transfer Restricted Shares in violation of this Section 2 will be null and void and will be disregarded.

Escrow of Stock. For purposes of facilitating the enforcement of the provisions of this Agreement, the Grantee agrees, immediately upon receipt

3.
of the certificate(s) for the Restricted Shares, to deliver such certificate(s), together with a Stock Assignment in the form attached hereto as Exhibit A,
executed in blank by the Grantee with respect to each such stock certificate, to the Secretary or Assistant Secretary of the Company, or their designee, to
hold in escrow for so long as such Restricted Shares have not vested pursuant to the Vesting Schedule set forth in the Notice, with the authority to take all
such actions and to effectuate all such transfers and/or releases as may be necessary or appropriate to accomplish the objectives of this Agreement in
accordance with the terms hereof. The Grantee hereby acknowledges that the appointment of the Secretary or Assistant Secretary of the Company (or their
designee) as the escrow holder hereunder with the stated authorities is a material inducement to the Company to make this Agreement and that such
appointment is coupled with an interest and is accordingly irrevocable. The Grantee agrees that the Restricted Shares may be held electronically in a book
entry system maintained by the Company’s transfer agent or other third party and that all the terms and conditions of this Section 3 applicable to
certificated Restricted Shares will apply with the same force and effect to such electronic method for holding the Restricted Shares. The Grantee agrees that
such escrow holder shall not be liable to any party hereto (or to any other party) for any actions or omissions unless such escrow holder is grossly negligent
relative thereto. The escrow holder may rely upon any letter, notice or other document executed by any signature purported to be genuine and may resign at
any time. Upon the vesting of Restricted Shares, the escrow holder will, without further order or instruction, transmit to the Grantee the certificate
evidencing such Shares; provided, however, that no transmittal of certificates evidencing the Shares will occur unless and until the Grantee has satisfied all
Tax Withholding Obligations (as defined in Section 5(c) below).

4.

Additional Securities and Distributions.

Any securities or cash received (other than a regular cash dividend) as the result of ownership of the Restricted Shares (the “Additional
(a)
Securities”), including, but not by way of limitation, warrants, options and securities received as a stock dividend or stock split, or as a result of a
recapitalization or reorganization or other similar change in the Company’s capital structure, shall be retained in escrow in the same manner and subject to
the same conditions and restrictions as the Restricted Shares with respect to which they were issued, including, without limitation, the Vesting Schedule set
forth in the Notice. The Grantee shall be entitled to direct the Company to exercise any warrant or option received as Additional Securities upon supplying
the funds necessary to do so, in which event the securities so purchased shall constitute Additional Securities, but the Grantee may not direct the Company
to sell any such warrant or option. If Additional Securities consist of a convertible security, the Grantee may exercise any conversion right, and any
securities so acquired shall constitute Additional Securities. In the event of any change in certificates evidencing the Shares or the Additional Securities by
reason of any recapitalization, reorganization or other transaction that results in the creation of Additional Securities, the escrow holder is authorized to
deliver to the issuer the certificates evidencing the Shares or the Additional Securities in exchange for the certificates of the replacement securities.

(b)
less any applicable withholding obligations.

The Company shall disburse to the Grantee all regular cash dividends with respect to the Shares and Additional Securities (whether vested or not),

    3

 
5.

Taxes.

Section 83(b) Election and Withholding of Taxes. The Grantee shall provide the Administrator with a copy of any timely election made pursuant

(a)
to Section 83(b) of the Internal Revenue Code or similar provision of state law (collectively, an “83(b) Election”), a form of which is attached hereto as
Exhibit B. If the Grantee makes a timely 83(b) Election, the Grantee shall immediately pay the Company the amount necessary to satisfy any applicable
foreign, federal, state, and local income and employment tax withholding obligations. If the Grantee does not make a timely 83(b) Election, the Grantee
shall, as Shares shall vest or at the time withholding is otherwise required by any Applicable Law, pay the Company the amount necessary to satisfy any
applicable foreign, federal, state, and local income and employment tax withholding obligations. The manners in which the Grantee may pay the Company
the amount necessary to satisfy any applicable foreign, federal, state, and local income and employment tax withholding obligations are set forth in
subsection (c) below. The Grantee hereby represents that he or she understands (a) the contents and requirements of the 83(b) Election, (b) the application
of Section 83(b) to the receipt of the Shares by the Grantee pursuant to this Agreement, (c) the nature of the election to be made by the Grantee under
Section 83(b), and (d) the effect and requirements of the 83(b) Election under relevant state and local tax laws. The Grantee further represents that he or she
intends to file an election pursuant to Section 83(b) with the Internal Revenue Service within thirty (30) days following the date of this Agreement, and
submit a copy of such election to the Company and with his or her federal tax return for the calendar year in which the date of this Agreement falls.

Tax Liability. The Grantee is ultimately liable and responsible for all taxes owed by the Grantee in connection with the Award, regardless of any

(b)
action the Company or any Related Entity takes with respect to any tax withholding obligations that arise in connection with the Award. Neither the
Company nor any Related Entity makes any representation or undertaking regarding the treatment of any tax withholding in connection with the grant or
vesting of the Award or the subsequent sale of Shares subject to the Award. The Company and its Related Entities do not commit and are under no
obligation to structure the Award to reduce or eliminate the Grantee’s tax liability.

Payment of Withholding Taxes. Prior to any event in connection with the Award (e.g., upon the filing of an 83(b) Election or vesting) that the

(c)
Company determines may result in any tax withholding obligation, whether United States federal, state, local or non-U.S., including any social insurance,
employment tax, payment on account or other tax-related obligation (the “Tax Withholding Obligation”), the Grantee must arrange for the satisfaction of
the minimum amount of such Tax Withholding Obligation in a manner acceptable to the Company.

By Share Withholding. Notwithstanding Section 7(c) of the Plan, if permissible under Applicable Law, the Administrator may permit the Grantee

(i)
to elect to authorize the Company to withhold from those Shares otherwise issuable to the Grantee the whole number of Shares sufficient to satisfy up to
the maximum applicable Tax Withholding Obligation. The maximum applicable Tax Withholding Obligation is based on the applicable rates of the relevant
tax authorities (for example, federal, state and local), including the Grantee’s share of payroll or similar taxes, as provided in the tax law, regulations or the
authority’s administrative practices, not to exceed the highest statutory rate in that jurisdiction. Any elections to have Shares withheld or sold for this
purpose will be made in accordance with the requirements established by the Administrator for such elections and be in writing in a form acceptable to the
Administrator. Further, if permissible under Applicable Law, the Grantee hereby authorizes the Company to, upon the exercise of its sole discretion,
withhold from those Shares otherwise issuable to the Grantee the whole number of Shares sufficient to satisfy the minimum applicable Tax Withholding
Obligation. The Grantee acknowledges that the withheld Shares may still not be sufficient to satisfy the Grantee’s minimum Tax Withholding Obligation.
Accordingly, the Grantee agrees to pay to the Company or any Related Entity as soon as practicable, including through additional payroll withholding, any
amount of the Tax Withholding Obligation that is not satisfied by the withholding of Shares described above.

(ii)
By Sale of Shares. Unless the Grantee determines to satisfy the Tax Withholding Obligation by some other means in accordance with clause (iii)
below, the Grantee’s acceptance of this Award constitutes the Grantee’s instruction and authorization to the Company and any brokerage firm determined
acceptable to the Company for such purpose to, upon the exercise of Company’s sole discretion, sell on the Grantee’s behalf a whole number of Shares
from those Shares issuable to the Grantee as the Company determines to be appropriate to generate cash proceeds sufficient to satisfy the minimum
applicable Tax Withholding Obligation. Such Shares will be sold on the day such Tax Withholding Obligation arises (e.g., a vesting date) or as soon
thereafter as practicable. The Grantee will be responsible for all broker’s fees and other costs of sale, and the Grantee agrees to indemnify and hold the
Company harmless from any losses, costs, damages, or expenses relating to any such sale. To the extent the proceeds of such sale exceed the Grantee’s
minimum Tax Withholding Obligation, the Company agrees to pay such excess in cash to the Grantee. The Grantee acknowledges that the Company or its
designee is under no obligation to arrange for such sale at any particular price, and that the proceeds of any such sale may not be sufficient to satisfy the
Grantee’s minimum Tax Withholding Obligation. Accordingly, the Grantee agrees to pay to the Company or

    4

 
any Related Entity as soon as practicable, including through additional payroll withholding, any amount of the Tax Withholding Obligation that is not
satisfied by the sale of Shares described above.

(iii)
By Check, Wire Transfer or Other Means. At any time not less than five (5) business days (or such fewer number of business days as determined
by the Administrator) before any Tax Withholding Obligation arises (e.g., a vesting date), the Grantee may elect to satisfy the Grantee’s Tax Withholding
Obligation by delivering to the Company an amount that the Company determines is sufficient to satisfy the Tax Withholding Obligation by (x) wire
transfer to such account as the Company may direct, (y) delivery of a certified check payable to the Company, or (z) such other means as specified from
time to time by the Administrator.

Notwithstanding the foregoing, the Company or a Related Entity also may satisfy any Tax Withholding Obligation by offsetting any amounts (including,
but not limited to, salary, bonus and severance payments) payable to the Grantee by the Company and/or a Related Entity. Furthermore, in the event of any
determination that the Company and/or a Related Entity has failed to withhold a sum sufficient to pay all withholding taxes due in connection with the
Award, the Grantee agrees to pay the Company and/or the Related Entity the amount of such deficiency in cash within five (5) days after receiving a
written demand from the Company and/or the Related Entity to do so, whether or not the Grantee is an employee of the Company and/or the Related Entity
at that time.

6.
Stop-Transfer Notices. In order to ensure compliance with the restrictions on transfer set forth in this Agreement, the Notice or the Plan, the
Company may issue appropriate “stop transfer” instructions to its transfer agent, if any, and, if the Company transfers its own securities, it may make
appropriate notations to the same effect in its own records. The Company may issue a “stop transfer” instruction if the Grantee fails to satisfy any Tax
Withholding Obligations.

Refusal to Transfer. The Company shall not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in

7.
violation of any of the provisions of this Agreement or (ii) to treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser
or other transferee to whom such Shares shall have been so transferred.

Restrictive Legends. The Grantee understands and agrees that the Company shall cause the legends set forth below or legends substantially

8.
equivalent thereto, to be placed upon any certificate(s) evidencing ownership of the Shares together with any other legends that may be required by the
Company or by state or federal securities laws:

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE RESTRICTED BY THE TERMS OF THAT CERTAIN RESTRICTED STOCK BONUS
AWARD AGREEMENT BETWEEN THE COMPANY AND THE NAMED STOCKHOLDER. The SHARES REPRESENTED BY THIS CERTIFICATE
MAY BE TRANSFERRED ONLY IN ACCORDANCE WITH SUCH AGREEMENT, A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF
THE COMPANY.

9.

Lock-Up Agreement.

(a)
Agreement. The Grantee, if requested by the Company and the lead underwriter of any public offering of the Common Stock (the “Lead
Underwriter”), hereby irrevocably agrees not to sell, contract to sell, grant any option to purchase, transfer the economic risk of ownership in, make any
short sale of, pledge or otherwise transfer or dispose of any interest in any Common Stock or any securities convertible into or exchangeable or exercisable
for or any other rights to purchase or acquire Common Stock (except Common Stock included in the public offering or acquired on the public market after
the offering) during the 180-day period following the effective date of a registration statement of the Company filed under the Securities Act of 1933, as
amended, or any shorter or longer period of time as the Lead Underwriter will specify. The Grantee further agrees to sign all documents as may be
requested by the Lead Underwriter to effect the foregoing and agrees that the Company may impose stop-transfer instructions with respect to the Common
Stock subject to the lock-up period until the end of the period. The Company and the Grantee acknowledge that each Lead Underwriter of a public offering
of the Company’s stock, during the period of the offering and for the lock-up period thereafter, is an intended beneficiary of this Section 9.

No Amendment Without Consent of Underwriter. During the period from identification of a Lead Underwriter in connection with any public

(b)
offering of the Company’s Common Stock until the earlier of (i) the expiration of the lock-up period specified in Section 9(a) in connection with the
offering or (ii) the abandonment of the offering by the Company and the Lead Underwriter, the provisions of this Section 9 may not be amended or waived
except with the consent of the Lead Underwriter.

    5

 
10.
Entire Agreement: Governing Law. The Notice, the Plan and this Agreement constitute the entire agreement of the parties with respect to the
subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Company and the Grantee with respect to the subject
matter hereof, and may not be modified adversely to the Grantee’s interest except by means of a writing signed by the Company and the Grantee. These
agreements are to be construed in accordance with and governed by the internal laws of the State of Delaware without giving effect to any choice of law
rule that would cause the application of the laws of any jurisdiction other than the internal laws of the State of Delaware to the rights and duties of the
parties. Should any provision of the Notice or this Agreement be determined to be illegal or unenforceable, the other provisions shall nevertheless remain
effective and shall remain enforceable.

Construction. The captions used in the Notice and this Agreement are inserted for convenience and shall not be deemed a part of the Award for

11.
construction or interpretation. Except when otherwise indicated by the context, the singular shall include the plural and the plural shall include the singular.
Use of the term “or” is not intended to be exclusive, unless the context clearly requires otherwise.

Administration and Interpretation. Any question or dispute regarding the administration or interpretation of the Notice, the Plan or this Agreement

12.
shall be submitted by the Grantee or by the Company to the Administrator. The resolution of such question or dispute by the Administrator shall be final
and binding on all persons.

Venue and Waiver of Jury Trial. The parties agree that any suit, action, or proceeding arising out of or relating to the Notice, the Plan or this

13.
Agreement shall be brought in the United States District Court for Delaware (or should such court lack jurisdiction to hear such action, suit or proceeding,
in a Delaware state court) and that the parties shall submit to the jurisdiction of such court. The parties irrevocably waive, to the fullest extent permitted by
law, any objection the party may have to the laying of venue for any such suit, action or proceeding brought in such court. THE PARTIES ALSO
EXPRESSLY WAIVE ANY RIGHT THEY HAVE OR MAY HAVE TO A JURY TRIAL OF ANY SUCH SUIT, ACTION OR PROCEEDING. If
any one or more provisions of this Section 13 shall for any reason be held invalid or unenforceable, it is the specific intent of the parties that such
provisions shall be modified to the minimum extent necessary to make it or its application valid and enforceable.

14.
Notices. Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively given upon personal delivery, upon
deposit for delivery by an internationally recognized express mail courier service or upon deposit in the United States mail by certified mail (if the parties
are within the United States), with postage and fees prepaid, addressed to the other party at its address as shown in these instruments, or to such other
address as such party may designate in writing from time to time to the other party.

15.
if the translated version is different than the English version, the English version will control, unless otherwise prescribed by Applicable Law.

Language. If the Grantee has received this Agreement or any other document related to the Plan translated into a language other than English and

16.

Nature of Award. In accepting the Award, the Grantee acknowledges and agrees that:

(a)
Company at any time, unless otherwise provided in the Plan and this Agreement;

the Plan is established voluntarily by the Company, it is discretionary in nature, and it may be modified, amended, suspended or terminated by the

(b)
even if awards have been awarded repeatedly in the past;

the Award is voluntary and occasional and does not create any contractual or other right to receive future awards, or benefits in lieu of awards,

(c)

(d)

all decisions with respect to future awards, if any, will be at the sole discretion of the Company;

the Grantee’s participation in the Plan is voluntary;

(e)
ability of the Company or the employer to terminate the Grantee’s employment relationship, if any, at any time;

the Grantee’s participation in the Plan shall not create a right to any employment with the Grantee’s employer and shall not interfere with the

the Award is not part of normal or expected compensation or salary for any purposes, including, but not limited to, calculating any severance,

(f)
resignation, termination, redundancy, end of service payments, bonuses, long-service awards, pension or retirement or welfare benefits or similar payments
and in no event should be considered as compensation for, or relating in any way to, past services for the Company or any Related Entity;

    6

 
(g)
not be interpreted to form an employment or service contract or relationship with the Company or any Related Entity;

in the event that the Grantee is not an Employee of the Company or any Related Entity, the Award and the Grantee’s participation in the Plan will

(h)

the future value of the underlying Shares is unknown and cannot be predicted with certainty;

in consideration of the Award, no claim or entitlement to compensation or damages shall arise from termination of the Award or diminution in

(i)
value of the Award or Shares acquired upon vesting of the Award, resulting from termination of the Grantee’s Continuous Service by the Company or any
Related Entity (for any reason whatsoever and whether or not in breach of local labor laws) and in consideration of the grant of the Award, the Grantee
irrevocably releases the Company and any Related Entity from any such claim that may arise; if, notwithstanding the foregoing, any such claim is found by
a court of competent jurisdiction to have arisen, then, by signing the Notice, the Grantee shall be deemed irrevocably to have waived his or her right to
pursue or seek remedy for any such claim or entitlement;

in the event of termination of the Grantee’s Continuous Service (whether or not in breach of local labor laws), the Grantee’s right to receive

(j)
Awards under the Plan and to vest in such Awards, if any, will (except as otherwise provided in the Notice or herein) terminate effective as of the date that
the Grantee is no longer providing services and will not be extended by any notice period mandated under local law (e.g., providing services would not
include a period of “garden leave” or similar period pursuant to local law); furthermore, in the event of termination of the Grantee’s Continuous Service
(whether or not in breach of local labor laws), the Administrator shall have the exclusive discretion to determine when the Grantee is no longer providing
services for purposes of this Award;

(k)
participation in the Plan or the Grantee’s acquisition or sale of the underlying Shares; and

the Company is not providing any tax, legal or financial advice, nor is the Company making any recommendations regarding the Grantee’s

(l)
the Plan before taking any action related to the Plan.

the Grantee is hereby advised to consult with the Grantee’s own personal tax, legal and financial advisers regarding the Grantee’s participation in

17.

Data Privacy.

The Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of the Grantee’s
(a)
personal data as described in the Notice and this Agreement by and among, as applicable, the Grantee’s employer, the Company and any Related Entity for
the exclusive purpose of implementing, administering and managing the Grantee’s participation in the Plan.

(b)
The Grantee understands that the Company and the Grantee’s employer may hold certain personal information about the Grantee, including, but
not limited to, the Grantee’s name, home address and telephone number, date of birth, social insurance or other identification number, salary, nationality,
job title, any Shares or directorships held in the Company, details of all Awards or any other entitlement to Shares awarded, canceled, vested, unvested or
outstanding in the Grantee’s favor, for the exclusive purpose of implementing, administering and managing the Plan (“Data”).

(c)
The Grantee understands that Data will be transferred to any third party assisting the Company with the implementation, administration and
management of the Plan. The Grantee understands that the recipients of the Data may be located in the Grantee’s country, or elsewhere, and that the
recipients’ country may have different data privacy laws and protections than the Grantee’s country. The Grantee understands that the Grantee may request
a list with the names and addresses of any potential recipients of the Data by contacting the Grantee’s local human resources representative. The Grantee
authorizes the Company and any other possible recipients which may assist the Company (presently or in the future) with implementing, administering and
managing the Plan to receive, possess, use, retain and transfer the Data, in electronic or other form, for the sole purpose of implementing, administering and
managing the Grantee’s participation in the Plan. The Grantee understands that Data will be held only as long as is necessary to implement, administer and
manage the Grantee’s participation in the Plan. The Grantee understands that the Grantee may, at any time, view Data, request additional information about
the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by
contacting in writing the Grantee’s local human resources representative. The Grantee understands, however, that refusal or withdrawal of consent may
affect the Grantee’s ability to participate in the

    7

 
Plan. For more information on the consequences of the Grantee’s refusal to consent or withdrawal of consent, the Grantee understands that the Grantee may
contact the Grantee’s local human resources representative.

END OF AGREEMENT

    8

 
EXHIBIT A

STOCK ASSIGNMENT

FOR VALUE RECEIVED, hereby sells, assigns and transfers unto [●], ( ) shares of the Common Stock of Krystal Biotech, Inc., a Delaware corporation
(the “Company”), standing in his/her name on the books of the Company [represented by Certificate No. herewith] and does hereby irrevocably constitute
and appoint the Secretary of the Company attorney to transfer the said stock in the books of the Company with full power of substitution.

DATED:                

Please sign this document but do not date it. The date and information of the transferee will be completed if and when the shares are assigned.

    9

 
EXHIBIT B

ELECTION UNDER SECTION 83(b)
OF THE INTERNAL REVENUE CODE OF 1986

The undersigned taxpayer hereby elects, pursuant to the Internal Revenue Code, to include in gross income for _____ the amount of any

compensation taxable in connection with the taxpayer’s receipt of the property described below:

1.

The name, address, taxpayer identification number and taxable year of the undersigned are:

TAXPAYER’S NAME:

TAXPAYER’S SOCIAL SECURITY NO.:

TAXABLE YEAR: Calendar Year _______

ADDRESS:

2.

3.

The property which is the subject of this election is __________ shares of the Common Stock of Krystal Biotech, Inc.

The property was transferred to the undersigned on ____________, ____.

4.

The property is subject to the following restrictions: The property is subject to a repurchase right pursuant to which the issuer has the
right to acquire the property at the original purchase price if for any reason taxpayer’s employment or service with the issuer is terminated. The issuer’s
repurchase right lapses in a series of periodic installments.

5.

The fair market value of the property at the time of transfer (determined without regard to any restriction other than a restriction which by

its terms will never lapse) is: $_______ per share x ________ shares = $___________.

6.

The undersigned paid $0 per share x _________ shares for the property transferred for a total of $______________.

The undersigned has submitted a copy of this statement to the person for whom the services were performed in connection with the undersigned’s

receipt of the above-described property. The undersigned taxpayer is the person performing the services in connection with the transfer of said property.

The undersigned will file this election with the Internal Revenue Service office to which he files his annual income tax return not later than 30

days after the date of transfer of the property. A copy of the election also will be furnished to the person for whom the services were performed. The
undersigned understands that this election will also be effective as an election under _____________ law.

Dated:

    10

Taxpayer

    
 
Subsidiaries of Krystal Biotech, Inc.

We have omitted the subsidiaries which, considered in the aggregate, would not constitute a “significant subsidiary,” as defined in Rule 1-02(w) of
Regulation S-X.

Exhibit 21.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statements (No. 333-237983) on Form S-3ASR and (Nos. 333-269539, 333-220589, 333-
252351, 333-262825) on Form S-8 of our reports dated February 27, 2023, with respect to the consolidated financial statements of Krystal Biotech, Inc.
and the effectiveness of internal control over financial reporting.

/s/ KPMG LLP

Pittsburgh, Pennsylvania
February 27, 2023

 
Exhibit 23.2

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING
FIRM

We consent to the incorporation by reference in Registration Statement on Form S-3-ASR (No. 333-237983) and Form S-8 (Nos. 333-
269539,  333-220589,  333-252351,  333-262825)  of  our  report  dated  February  28,  2022,  with  respect  to  the  consolidated  financial
statements  of  Krystal  Biotech,  Inc.  as  of  December  31,  2021  and  for  the  years  ended  December  31,  2021  and  2020,  included  in  this
annual report on Form 10-K of Krystal Biotech, Inc. as of and for the year ended December 31, 2022.

/s/ Mayer Hoffman McCann P.C.

San Diego, California
February 27, 2023

 
 
 
 
Exhibit 31.1

CERTIFICATION PURSUANT TO
RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Krish S. Krishnan, certify that:

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K of Krystal Biotech, Inc.;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the small business issuer as of, and for, the periods presented in this report;

The small business issuer's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f)
and 15d-15(f)) for the small business issuer and have:

(a)

(b)

(c)

(d)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the small business issuer, including its  subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being prepared;

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our
supervision, 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;

Evaluated the effectiveness of the small business issuer's disclosure controls and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such
evaluation; and

Disclosed in this report any change in the small business issuer's internal control over financial reporting that occurred during the small
business issuer's most recent fiscal quarter (the small business issuer's fourth fiscal quarter in the case of an annual report) that has
materially affected, or is reasonably likely to materially affect, the small business issuer's internal control over financial reporting; and

5.

The small business issuer's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial
reporting, to the small business issuer's auditors and the audit committee of the small business issuer's board of directors (or persons performing
the equivalent functions):

(a)

(b)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are
reasonably likely to adversely affect the small business issuer's ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant role in the small business
issuer's internal control over financial reporting.

Date: February 27, 2023

By:

/s/ Krish S. Krishnan
Krish S. Krishnan
President and Chief Executive Officer
(Principal Executive Officer)

 
 
 
 
Exhibit 31.2

CERTIFICATION PURSUANT TO
RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Kathryn A. Romano, certify that:

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K of Krystal Biotech, Inc.;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the small business issuer as of, and for, the periods presented in this report;

The small business issuer's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f)
and 15d-15(f)) for the small business issuer and have:

(a)

(b)

(c)

(d)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the small business issuer, including its  subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being prepared;

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our
supervision, 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;

Evaluated the effectiveness of the small business issuer's disclosure controls and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such
evaluation; and

Disclosed in this report any change in the small business issuer's internal control over financial reporting that occurred during the small
business issuer's most recent fiscal quarter (the small business issuer's fourth fiscal quarter in the case of an annual report) that has
materially affected, or is reasonably likely to materially affect, the small business issuer's internal control over financial reporting; and

5.

The small business issuer's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial
reporting, to the small business issuer's auditors and the audit committee of the small business issuer's board of directors (or persons performing
the equivalent functions):

(a)

(b)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are
reasonably likely to adversely affect the small business issuer's ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant role in the small business
issuer's internal control over financial reporting.

Date: February 27, 2023

By:

/s/ Kathryn A. Romano
Kathryn A. Romano
Chief Accounting Officer
(Principal Financial and Accounting Officer)

 
 
 
 
Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Krystal Biotech, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2022 as filed

with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the
Sarbanes-Oxley Act of 2002, that:

(1)

(2)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the
Company.

Date: February 27, 2023

Date: February 27, 2023

By:

By:

/s/ Krish S. Krishnan
Krish S. Krishnan
President and Chief Executive Officer
(Principal Executive Officer)

/s/ Kathryn A. Romano
Kathryn A. Romano
Chief Accounting Officer
(Principal Financial and Accounting Officer)