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Mustang Bio, Inc.

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FY2019 Annual Report · Mustang Bio, Inc.
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

¨¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Fiscal Year Ended December 31, 2019

or

For the Transition Period from                       to                      .

Commission File No. 001-38191

MUSTANG BIO, INC.
(Exact Name of Registrant as Specified in its Charter)

Delaware

47-3828760

(State or Other Jurisdiction of Incorporation or Organization)

(I.R.S. Employer Identification No.)

377 Plantation Street
Worcester, Massachusetts 01605
(Address including zip code of principal executive offices)

(781) 652-4500
(Registrant’s telephone number, including area code)

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

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, par value $0.0001 per share

MBIO

NASDAQ Global Market

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes  ¨  No   x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  Yes  ¨   No   x

Securities registered pursuant to section 12(g) of the Act: None.

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    x   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   x   No   ¨

Indicate  by  check  mark  whether  the  registrant  is  a  large  accelerated  filer,  an  accelerated  filer,  a  non-accelerated  filer,  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

¨

¨

x

Accelerated filer

Smaller reporting company

x

x

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.    x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes   ¨   No   x

Class of Common Stock
Class A Common Stock, $0.0001 par value

Common Stock, $0.0001 par value

Outstanding Shares as of March 13, 2020
845,385

41,999,369

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s Proxy Statement for its 2020 Annual Meeting of Stockholders are incorporated by reference into Part III hereof.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
MUSTANG BIO, INC.
ANNUAL REPORT ON FORM 10-K
TABLE OF CONTENTS

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.

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

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
Selected Financial Data
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

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

Item 14.

Principal Accountant Fees and Services

PART IV
Item 15.
Item 16.

Exhibits, Financial Statement Schedules
Form 10-K Summary

Page

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SPECIAL CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS 

Certain matters discussed in this annual report on Form 10-K (“Form 10-K”) may constitute forward-looking statements for purposes of the Securities Act of 1933, as amended
(the “Securities Act”) and the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and involve known and unknown risks, uncertainties and other factors that
may  cause  our  actual  results,  performance  or  achievements  to  be  materially  different  from  the  future  results,  performance  or  achievements  expressed  or  implied  by  such
forward-looking  statements.  The  words  “anticipate,”  “believe,”  “estimate,” “may,”  “expect”  and  similar  expressions  are  generally  intended  to  identify  forward-looking
statements. Our actual results may differ materially from the results anticipated in these forward-looking statements due to a variety of factors, including, without limitation,
those discussed under the captions “Risk Factors,” and elsewhere in this Form 10-K. All written or oral forward-looking statements attributable to us are expressly qualified in
their entirety by these cautionary statements. Such forward-looking statements include, but are not limited to, statements about our:

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·

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expectations for increases or decreases in expenses;

expectations for the clinical and pre-clinical development, manufacturing, regulatory approval, and commercialization of our pharmaceutical product candidates or any
other products we may acquire or in-license;

use of clinical research centers and other contractors;

expectations for incurring capital expenditures to expand our research and development and manufacturing capabilities;

expectations for generating revenue or becoming profitable on a sustained basis;

expectations or ability to enter into marketing and other partnership agreements;

expectations or ability to enter into product acquisition and in-licensing transactions;

expectations or ability to build our own commercial infrastructure to manufacture, market and sell our drug candidates;

expectations for the acceptance of our products by doctors, patients or payors;

ability to compete against other companies and research institutions;

ability to secure adequate protection for our intellectual property;

ability to attract and retain key personnel;

ability to obtain reimbursement for our products;

estimates of the sufficiency of our existing cash and cash equivalents and investments to finance our operating requirements, including expectations regarding the value
and liquidity of our investments;

stock price and the volatility of the equity markets;

expected losses; and

expectations for future capital requirements.

The forward-looking statements contained in this Form 10-K reflect our views and assumptions as of the effective date of this Form 10-K. Except as required by law, we assume
no responsibility for updating any forward-looking statements.

We qualify all of our forward-looking statements by these cautionary statements.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 1.

 Business

OVERVIEW

 PART I

Mustang Bio, Inc. (“Mustang”, “We”, “Us” or the “Company”) is a clinical-stage biopharmaceutical company focused on translating today’s medical breakthroughs in cell and
gene therapies into potential cures for hematologic cancers, solid tumors and rare genetic diseases. We aim to acquire rights to these technologies by licensing or otherwise
acquiring an ownership interest in the technologies, funding their research and development and eventually either out-licensing or bringing the technologies to market.

Our  pipeline  is  currently  focused  in  three  core  areas:  gene  therapy  programs  for  rare  genetic  disorders,  chimeric  antigen  receptor  (“CAR”)  engineered  T  cell  (“CAR  T”)
therapies for hematologic malignancies and CAR T therapies for solid tumors. For each therapy we have partnered with world class research institutions. For our gene therapy
programs,  we  have  partnered  with  St.  Jude  Children’s  Research  Hospital  (“St.  Jude”)  in  the  development  of  a  first-in-class  ex vivo  lentiviral  treatment  of  X-linked  severe
combined immunodeficiency (“XSCID”) and for our CAR T therapies we have partnered with the City of Hope National Medical Center (“COH”), Fred Hutchinson Cancer
Research Center (“Fred Hutch”) and Nationwide Children’s Hospital (“Nationwide”). 

Gene Therapy

In partnership with St. Jude, our gene therapy program (MB-107) is being conducted under an exclusive license to develop a potentially curative treatment for XSCID, a rare
genetic immune system condition in which affected patients do not live beyond infancy without treatment. This first-in-class ex vivo lentiviral gene therapy is currently in two
Phase  1/2  clinical  trials:  a  multicenter  trial  in  newly  diagnosed  infants  sponsored  by  St.  Jude  and  a  single-center  trial  in  previously  transplanted  patients  sponsored  by  the
National Institutes of Health (“NIH”). We plan to file separate Investigational New Drug Applications in 2020 in order to conduct a pivotal non-randomized phase 2 registration
trial in each of the two patient populations.

CAR T Therapies

Our pipeline of CAR T therapies is being developed under exclusive licenses from several world class research institutions. Our strategy is to license these technologies, support
preclinical and clinical research activities by our partners and transfer the underlying technology to our cell processing facility located in Worcester, Massachusetts, to conduct
our own clinical trials.

We  are  developing  CAR  T  therapies  for  hematologic  malignancies  in  partnership  with  COH  targeting  CD123  (MB-102)  and  CS1  (MB-104)  and  with  Fred  Hutch  targeting
CD20 (MB-106). Phase 1 clinical trials sponsored by COH for MB-102 and MB-104 and by Fred Hutch for MB-106 are underway. In the third quarter of 2019 the U.S. Food
and  Drug Administration  (“FDA”)  approved  our  IND  application  to  initiate  a  multi-center  Phase  1/2  clinical  trial  of  MB-102,  and  our  clinical  trial  is  expected  to  begin
enrollment  in  the  first  half  of  2020  for  the  treatment  of  patients  with  acute  myeloid  leukemia,  blastic  plasmacytoid  dendritic  cell  neoplasm,  and  high-risk  myelodysplastic
syndrome. We expect to file an IND for MB-104 in the second half of 2020 and to initiate our own Phase 1 clinical trial shortly thereafter for the treatment of patients with
multiple  myeloma.  We  also  plan  to  file  an  IND  and  initiate  our  own  clinical  trial  for  MB-106  for  the  treatment  of  patients  with  non-Hodgkin  lymphoma  and  chronic
lymphocytic leukemia.

We are also developing CAR T therapies for solid tumors in partnership with COH targeting IL13Ra2 (MB-101), HER2 (MB-103) and PSCA (MB-105). In addition, we have
partnered  with  Nationwide  for  the  C134  oncolytic  virus  (MB-108)  in  order  to  enhance  the  activity  of  MB-101  for  the  treatment  of  patients  with  glioblastoma  multiforme
(“GBM”).  Phase  1  clinical  trials  sponsored  by  COH  for  MB-101,  MB-103  and  MB-105  are  underway. A  Phase  1  clinical  trial  sponsored  by  the  University  of Alabama  at
Birmingham (“UAB”) for MB-108 began during the third quarter of 2019 and, in the second half of 2020, we plan to file an IND for the combination of MB-101 and MB-108
for the treatment of patients with GBM. We also plan to file INDs and initiate our own clinical trials for MB-103 for the treatment of patients with metastatic breast cancer to
brain and for MB-105 for the treatment of patients with prostate and pancreatic cancer.

4

 
 
 
 
 
 
 
 
 
 
 
 
 
To date, we have not received approval for the sale of our product candidates in any market and, therefore, have not generated any product sales from our product candidates. In
addition, we have incurred substantial operating losses since our inception, and expect to continue to incur significant operating losses for the foreseeable future and may never
become profitable. As of December 31, 2019, we have an accumulated deficit of $125.5 million. 

We are a majority-controlled subsidiary of Fortress Biotech, Inc. (“Fortress”).  

CORPORATE INFORMATION

Mustang Bio, Inc. was incorporated in Delaware on March 13, 2015. Our executive offices are located at 377 Plantation Street, Worcester, Massachusetts 01605. Our telephone
number is (781) 652-4500, and our email address is info@mustangbio.com.

Our website address is www.mustangbio.com. The information set forth on our website is not a part of this report. We will make available free of charge through our website
our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, and any amendments to these reports, as soon as reasonably practicable after
we electronically file such material with, or furnish such material to, the Securities and Exchange Commission (“SEC”). We are not including the information on our website as
a part of, nor incorporating it by reference into, this report. The SEC maintains a website that contains annual, quarterly, and current reports, proxy and information statements,
and other information that issuers (including us) file electronically with the SEC. The SEC’s website address is http://www.sec.gov/.

PRODUCTS UNDER DEVELOPMENT

Gene Therapy for Rare Genetic Disorders 

MB-107 (Ex vivo Lentiviral Therapy for X-linked Severe Combined Immunodeficiency) 

XSCID is a rare genetic immune system condition also known as bubble boy disease, in which affected patients do not live beyond infancy without treatment.

This first-in-class ex vivo lentiviral gene therapy has already been given to 24 patients in two early stage clinical trials, with highly encouraging results. Eleven patients under the
age of two years were treated at St. Jude and UCSF Benioff Children’s Hospital San Francisco, with results presented at the 61st Annual Meeting of the American Society of
Hematology (“ASH”) in December 2019 (ClinicalTrials.gov Identifier: NCT01512888), and eleven patients 3-34 years of age were treated in a single-center trial at the NIH
(ClinicalTrials.gov Identifier: NCT01306019), with results presented at that same ASH meeting in December 2019.

The existing data from these 24 patients are encouraging. In the initial Phase 1/2 NIH trial, eight patients (referred to as Cohort A) have now been followed for 3 to 7 years.
Among Cohort A, seven patients aged 3 to 23 years increased host T cells chimerism from 0-2% to 28-93% and had normal T cell proliferation response. These seven patients
also normalized their IgM levels, and four of these patients were able to discontinue immunoglobulin replacement therapy. In addition, gradual clinical benefit was observed in
the clearance of chronic norovirus and associated abdominal complaints, malabsorption, and growth retardation, with six of seven affected patients being cured of their disease.
Five of six patients resolved their protein-losing enteropathy.

While the Cohort A results were impressive, the relatively inefficient transduction of hematopoietic stem/progenitor cells (“HSPCs”) required large quantities of vector. This
resulted in relatively low vector copy number in myeloid cells in some patients, with delayed immune cell recovery and persistent clinical disease, especially in the last patient
treated  (patient  8).  To  address  this,  NIH  developed  a  refined  enhanced  transduction  (“ET”)  procedure  and  incorporated  two  transduction  enhancers:  LentiBoost  1:100  and
dimethyl prostaglandin 2 (dmPGE2; 1mM).

In addition to the Cohort A results, the NIH presentation at the 2019 ASH Annual Meeting included data from six ET patients (referred to as Cohort B) treated from February to
June  2019,  including  re-treatment  of  patient  8.  Prior  to  undergoing  gene  therapy,  the  patients,  who  were  aged  12  to  36  years,  had  significant  problems  with  donor  T  cell
infiltration of liver, bone marrow and kidneys, and were nearly absent of B and NK cells. The ET procedure achieved much greater transduction efficiencies than were observed
in Cohort A, with greater than 10-fold less vector, and resulted in faster immune reconstitution and more significant clinical benefit by 3 months. As noted by the investigators,
longer follow-up will be required to know if the increased vector marking using the ET regimen will prove to be stable and safe long term.

In all NIH patients, the low-dose, nonmyeloablative busulfan pretreatment conditioning was well tolerated, and of a low enough intensity to avoid the need for transfusions of
red blood cells or platelets. No evidence of malignant transformation was observed.

Subsequent to the initiation of the NIH trial, eleven patients under two years old who had not previously undergone HSCT were treated with the ex-vivo gene therapy in a St.
Jude/UCSF Phase 1/2 trial, resulting in highly encouraging results. Low-dose busulfan conditioning caused adverse events in only two patients (mild mucositis; mucositis, hair
loss), and no patients required blood product support. All 11 patients had robust hematopoietic recovery within 3-4 weeks post cell infusion, and the nine patients who had a
follow-up of greater than 3 months achieved normal-for-age T-cell and natural killer (“NK”)-cell numbers within 3-4 months post gene therapy. Five patients were reported to
have  successfully  discontinued  intravenous  immunoglobulin  (“IVIG”)  therapy,  of  whom  3  responded  to  vaccines.  Median  vector  copy  number  (“VCN”)  at  12  months  post-
gene therapy in the seven patients who had a follow-up of greater than 12 months was 2.25 VCN/cell (range: 1.24-3.03) in T cells, 0.34 VCN/cell (range: 0.23-1.25) in B cells,
1.55 VCN/cell (range 1.27-3.39) in NK cells, and 0.08 VCN/cell (range: 0.03-0.76) in myeloid cells in peripheral blood, and 0.10 (range: 0.05-0.66) in CD34+ bone marrow
cells, respectively.  With a median follow-up of 23.6 months, no evidence of malignant transformation was observed.

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CAR T Therapies for Hematologic Malignancies

MB-102 (CD123 CAR T cell Program for AML)

CD123 is a subunit of the heterodimeric interleukin-3-receptor (“IL-3R”) which is widely expressed on human hematologic malignancies including acute myeloid leukemia
(“AML”). In addition, CD123 can be found on the surface of B cell acute lymphoblastic leukemia (“B-ALL”), hairy cell leukemia, myelodysplastic syndrome (“MDS”), blastic
plasmacytoid dendritic cell neoplasm (“BPDCN”), chronic myeloid leukemia (“CML”) and Hodgkin lymphoma.

Of these malignancies, we are currently investigating CD123 as a target for adoptive cellular immunotherapy in AML, high-risk myelodysplastic syndrome (“hrMDS”) and
BPDCN, since high CD123 expression is associated with enhanced AML blast proliferation, increased resistance of blasts to apoptosis, and poor clinical prognosis. CD123 is
overexpressed in the vast majority of cases of AML and hrMDS and in essentially all cases of BPDCN.

Acute myeloid leukemia is a cancer of the myeloid line of blood cells characterized by rapid growth of abnormal white blood cells that accumulate in the bone marrow. AML is
the most common form of acute leukemia. Although AML is a relatively rare disease, there are approximately 20,000 new cases per year in the U.S. and 10,000 deaths per year,
accounting for approximately 1.8% of cancer deaths in the U.S. [Source: The Surveillance, Epidemiology, and End Results (“SEER”) Program of the National Cancer Institute].
AML  standard  of  care  involves  chemotherapy  to  induce  remission  followed  by  additional  chemotherapy  or  hematopoietic  stem  cell  transplant.  Allogeneic  stem  cell
transplantation  is  the  preferred  treatment  for AML  following  a  second  remission.  It  can  lead  to  a  5-year  disease-free  survival  in  26%  of  patients.  Unfortunately,  however,
currently only about half of relapsed patients are able to achieve a second remission with traditional chemotherapy agents. Patients who do not achieve a second remission are
much less likely to benefit from transplantation and face a dismal outcome.

MDS  is  a  heterogeneous  group  of  malignant  hematopoietic  stem  cell  disorders  characterized  by  dysplastic  and  ineffective  blood  cell  production  and  a  variable  risk  of
transformation  to  acute  leukemia.  Patients  with  MDS  have  varying  reductions  in  the  production  of  red  blood  cells,  platelets,  and  mature  granulocytes  that  may  also  exhibit
functional  defects;  these  abnormalities  often  result  in  anemia,  bleeding,  and  increased  risk  of  infection.  The  precise  incidence  of  de  novo  MDS  is  not  known;  conservative
estimates  from  cancer  databases  suggest  that  there  are  approximately  10,000  cases  diagnosed  annually  in  the  U.S.  The  actual  incidence  of  MDS  is  likely  higher  than  that
predicted by cancer databases, since the nonspecific symptoms may evade detection in early stages of the disease and suspected cases may not undergo definitive testing (i.e.,
bone marrow biopsy) due to comorbidities. Investigations that have analyzed reimbursement claims have estimated the incidence in the U.S. to be 30,000 to 40,000 new cases
per year. MDS occurs most commonly in older adults, with a median age at diagnosis in most series of ≥65 years and a male predominance.

MDS and AML lie along a disease continuum with distinction between the two largely made based upon the percentage of myeloblasts, which are immature cells with large
nuclei,  nucleoli,  and  a  scant  rim  of  dark  blue  cytoplasm,  suggesting  an  underlying  malignant  hematologic  disorder.  In  the  current  World  Health  Organization  (“WHO”)
classification system, blast forms must account for less than 20% of the total cells of the bone marrow aspirate and peripheral blood in order to meet the criteria for MDS.

MDS  prognosis  is  often  assessed  using  the  revised  International  Prognostic  Scoring  System  (“IPSS-R”),  which  takes  into  account  cytogenetics,  percentage  of  bone  marrow
blasts, and the degree of anemia, thrombocytopenia, and neutropenia. This System categorizes patients into very low, low, intermediate, high, and very high risk MDS. High
risk and very high risk MDS are generally progressive in nature and can easily progress to AML. Treatment is stratified according to medical fitness in a manner similar to that
for older patients with AML. Patients who are medically fit or of intermediate fitness are generally evaluated soon after diagnosis to determine their suitability for allogeneic
hematopoietic  cell  transplantation.  For  patients  who  are  not  candidates  for  intensive  treatment,  care  is  focused  on  relieving  symptoms  and  improving  the  quality  of  life  and
might involve lower intensity treatment, for example, with azacitidine, decitabine, or targeted therapy. Patients with recurrent or refractory higher risk MDS may be encouraged
to participate in clinical trials. Outside of a clinical trial, the management of patients with recurrent or refractory MDS is largely dependent on the patient's prior therapy.

BPDCN is categorized by the World Health Organization under AML. Most often, BPDCN presents with features of both lymphoma and leukemia. There are little data about
BPDCN  and  the  only  approved  drug  for  this  disease  is  tagraxofusp-erzs,  which  is  indicated  for  the  treatment  of  adult  and  pediatric  patients  with  both  treatment-naïve  and
previously-treated BPDCN. The average age at diagnosis is 60 to 70 years. BPDCN is very often misdiagnosed and under-reported. The skin is the most frequently involved site
of disease (80 percent of cases). However, BPDCN usually progresses with bone marrow involvement and a decrease in red blood cell, white blood cell and platelet counts. The
lymph nodes and spleen may also be involved. Common misdiagnoses for BPCDN include non-Hodgkin lymphoma (“NHL”), AML, leukemia cutis [a nonspecific term used
for cutaneous (skin) manifestation of any type of leukemia], melanoma (a type of skin cancer), and lupus erythematosus (chronic inflammatory disease that occurs when the
body's immune system attacks its own tissues and organs). There are no data or clinical trials that can define the best first treatment for patients with BPDCN. In addition to the
emerging use of tagraxofusp-erzs, which was approved by the FDA in December 2018, treatment sometimes includes therapies that are used for AML, ALL, or lymphoma. The
time for which a patient responds to these treatments is usually short. After a relapse, second remissions with conventional chemotherapy are difficult to achieve. Allogeneic
hematopoietic stem cell transplant (“allo-SCT”), especially if offered in first remission, may result in longer remissions. The current recommendation is for BPDCN patients to
be evaluated for an allo-SCT as soon as possible and to begin searching for a donor.

The  use  of  CAR  T  immunotherapy  in  relapsed AML,  hrMDS  and  BPDCN  patients  may  offer  the  potential  to  achieve  a  complete  or  longer  lasting  remission.  We  have
developed CD123-targeted CAR T cells designed both to be activated to proliferate and to kill CD123-expressing tumor cells [Mardiros A  et al. Blood.  2013;122(18):3138-
3148].  The  therapy  is  designed  to  recognize  and  eliminate  leukemic  cells,  leading  to  remission  in  patients  with  relapsed  or  refractory AML,  and  could  serve  as  a  bridge  to
potentially curative allogeneic stem cell transplant. The manufacturing process genetically modifies T cells isolated from peripheral blood mononuclear cells in order to express
a CD123-specific, hinge-optimized, CD28 co-stimulatory domain-expressing CAR.

In addition to the COH trial with MB-102 that is currently nearing the end of enrollment of AML and BPDCN patients (ClinicalTrials.gov Identifier: NCT02159495), Mustang
has  initiated  a  multicenter  MB-102  trial  under  its  IND  to  treat AML,  hrMDS,  and  BPDCN  patients  (ClinicalTrials.gov  Identifier:  NCT04109482).  This  trial  is  open  for  the
accrual of patients at COH and Duke University, and additional centers are scheduled for initiation at MD Anderson Cancer Center and Dana-Farber Cancer Institute.

MB-106 (CD20 CAR T cell Program for B cell non-Hodgkin lymphoma)

CD20 is a promising target for immunotherapy of B-cell lymphomas. CD20 is a B-cell lineage-specific phosphoprotein that is expressed in high, homogeneous density on the
surface of more than 95% of B-cell NHL. CD20 is stable on the cell surface with minimal shedding or internalization upon binding antibody and is present at only nanomolar
levels as soluble antigen. It is well established as an effective immunotherapy target, with extensive studies demonstrating improved tumor responses and survival of B-NHL
patients treated with rituximab and other anti-CD20 antibodies. Importantly, CD20 continues to be expressed on the lymphoma cells of most patients with relapsed B-NHL
despite repetitive rituximab treatments, and loss of CD20 expression is not a major contributor to treatment resistance. Thus, there is strong rationale for testing CD20 CAR T
cells as an immunotherapy for NHL.

More than 70,000 new cases of NHL are diagnosed each year in the United States, and more than 19,000 patients die of this group of diseases annually. Most forms of NHL
including follicular lymphoma, mantle cell lymphoma, marginal zone lymphoma, lymphoplasmacytic lymphoma, and small lymphocytic lymphoma, which account collectively
for ~45% of all cases of NHL, are incurable with available therapies, except for allogenic hematopoietic stem cell transplant (“allo-SCT”). However, many NHL patients are not
suitable candidates for allo-SCT, and this treatment is also limited by significant rates of morbidity and mortality due to graft-versus-host disease. Aggressive B-cell lymphomas
such as diffuse large B-cell lymphoma account for 30-35% of NHL. The majority of patients with aggressive B-NHL are successfully treated with combination chemotherapy,
but a significant proportion relapse or have refractory disease, and the outcome of these patients is poor. Innovative new treatments are therefore urgently needed.

Fred  Hutch  has  an  open  IND  for  a  Phase  1/2  clinical  study  to  evaluate  the  maximum  tolerated  dose  of  MB-106  (ClinicalTrials.gov  Identifier:  NCT03277729).  Secondary
endpoints include safety and toxicity, preliminary antitumor activity as measured by overall response rate and complete remission rate, progression-free survival, and overall
survival. The trial will also assess CAR T cell persistence and determine the potential immunogenicity of the cells, and Mustang together with Fred Hutch will determine a
recommended Phase 2 dose. Fred Hutch intends to enroll approximately 30 subjects on the trial, which is being led by principal investigator Mazyar Shadman, M.D., M.P.H.,

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Assistant Member of Fred Hutch’s Clinical Research Division. This IND was submitted on February 24, 2017, with Fred Hutch as the sponsor.

6

 
The  IND  was  amended  in  2019  to  incorporate  an  optimized  manufacturing  process  that  had  been  developed  in  collaboration  with  Mustang.  Due  to  the  expected  increased
potency of the CAR-T cells, the dose in the first cohort treated with this optimized manufacturing process was reduced back to the cohort 1 dose of 3.3 x 105 CAR T cells/kg.
The first patient treated in this cohort had follicular lymphoma that had relapsed after initial therapy, maintenance therapy, and two salvage regimens. She achieved a complete
response (CR) on Day 28, and no cytokine release syndrome or neurologic toxicity was observed. While this initial success using the optimized MB-106 process is important,
additional clinical testing is necessary, and accrual to the new cohort continues.

MB-104 (CS1 CAR T for Multiple Myeloma and Light Chain Amyloidosis)

CS1 (also known as CD319, CRACC and SLAMF7) was identified as an NK cell receptor regulating immune functions. It is also expressed on B cells, T cells, dendritic cells,
NK-T  cells,  and  monocytes.  CS1  is  overexpressed  in  multiple  myeloma  (“MM”)  and  light  chain  amyloidosis  (“AL”),  which  makes  it  a  good  target  for  immunotherapy. A
humanized  anti-CS1  antibody,  elotuzumab  (Empliciti™),  has  shown  promising  results  in  clinical  studies.  Despite  great  advances  in  treatment,  MM  remains  an  incurable
malignancy  of  plasma  cells. AL  is  a  protein  deposition  disorder  that  is  a  result  of  a  plasma  cell  dysplasia,  similar  to  MM.  Immunotherapy  is  an  attractive  approach  for AL
because of the low burden of disease. Our academic partners at COH have developed a novel second generation CS1-specific CAR T cell therapy. In preclinical studies, they
have demonstrated efficacy of these CAR T cells, both in vitro and in vivo, within the context of clinically relevant models of MM and AL. COH is evaluating the safety of this
CS1-specific CAR T cell therapy in a Phase 1/2 trial that commenced in the first half of 2019 (ClinicalTrials.gov Identifier: NCT03710421).

CAR T Therapies for Solid Tumors

MB-101 (IL13Ra2 CAR T Cell Program for Glioblastoma)

GBM is the most common brain and central nervous system (“CNS”) cancer, accounting for 45.2% of malignant primary brain and CNS tumors, 54% of all gliomas, and 16%
of all primary brain and CNS tumors. An estimated 12,390 new glioblastoma cases were predicted in 2017 in the U.S. Malignant brain tumors are the most common cause of
cancer-related deaths in adolescents and young adults aged 15-39 and the most common cancer occurring among 15-19 year-olds in the U.S. While GBM is a rare disease [(2-3
cases per 100,000 persons per year in the U.S. and European Union (“EU”)], it is quite lethal, with five-year survival rates historically under 10%. Standard of care therapy
consists of maximal surgical resection, radiation and chemotherapy with temozolomide, which, while rarely curative, is shown to extend median overall survival from 4.5 to 15
months. GBM remains difficult to treat due to the inherent resistance of the tumor to conventional therapies.

Immunotherapy approaches targeting brain tumors offer promise over conventional treatments. IL13Ra2 is an attractive target for CAR T therapy, as it has limited expression in
normal  tissue  but  is  overexpressed  on  the  surface  of  greater  than  50%  of  GBMs.  CAR  T  cells  are  designed  to  express  membrane-tethered  IL-13  receptor  ligand  (“IL-13”)
mutated at a single site (glutamic acid at position 13 to a tyrosine; E13Y) with high affinity for IL13Rα2 and reduced binding to IL13Ra1 in order to reduce healthy tissue
targeting (Kahlon KS et al. Cancer Research. 2004;64:9160-9166).

We are developing an optimized CAR T product incorporating enhancements in CAR T design and T cell engineering to improve antitumor potency and T cell persistence. We
include  a  second-generation  hinge-optimized  CAR  containing  mutations  in  the  IgG4  linker  to  reduce  off-target  Fc  interactions  (Jonnalagadda  M et  al.  Molecular  Therapy.
2015;23(4):757-768.). We also include the 4-1BB (CD137) co-stimulatory signaling domain for improved survival and maintenance of CAR T cells. Finally, we incorporate the
extracellular domain of CD19 as a selection/tracking marker. In order to further improve persistence, either central memory T-cells (T CM; Arms 1 – 4) or enriched CD62L+
naïve and memory T cells (TN/MEM; Arm 5) are isolated and enriched. The manufacturing process limits ex vivo expansion, which is designed to reduce T cell exhaustion and
maintain a TCM or TN/MEM phenotype. These CAR modified TCM and TN/MEM cells are shown to be more potent and persistent than earlier generations of CAR T cells, based
on experiments with CAR Ts in mouse xenograft models of GBM.

Our academic partners at COH have an open IND to assess the feasibility and safety of using TCM or TN/MEM enriched IL13Ra2-specific CAR engineered T cells for clinical
study  participants  with  recurrent/refractory  malignant  glioma  (ClinicalTrials.gov  Identifier:  NCT02208362).  This  IND  was  submitted  in  October  2014,  with  COH  as  the
sponsor.  COH  has  enrolled  and  treated  60patients  as  of  December  31,  2019.  In  the  annual  meeting  of  the American Association  for  Cancer  Research  in April  2018,  our
collaborators at COH presented the preliminary data for patients enrolled on Arm 2 of the protocol (the “Intracavitary Arm”). The investigators reported that the CAR T cells
were well-tolerated, meaning that no dose-limiting toxicities were seen to date. In 2016 the investigators reported on a patient that they determined had a complete response to
treatment based on the imaging and clinical features set forth by the Response Assessment in Neuro-Oncology Criteria (“RANO”). This result was published as a case report in
the New England Journal of Medicine (Brown CE et al. NEJM. 2016;375:2561-9). As described in the paper, a patient with recurrent multifocal glioblastoma received multiple
infusions  of IL13Ra2-specific CAR T cells over 220 days through two intracranial delivery routes – infusions into the resected tumor cavity followed by infusions into the
ventricular  system.  Intracranial  infusions  of  IL13Rα2-targeted  CAR  T  cells  were  not  associated  with  any  toxic  effects  of  grade  3  or  higher. After  CAR  T-cell  treatment,
regression of all intracranial and spinal tumors was observed, along with corresponding increases in levels of cytokines and immune cells in the cerebrospinal fluid. This clinical
response was sustained for 7.5 months after the initiation of CAR T-cell therapy; however, the patient’s disease eventually recurred at four new locations that were distinct and
non-adjacent to the original tumors, and biopsy of one of these lesions showed decreased expression of IL13Rα2. With enrollment in this Phase 1 study nearly complete, COH
has established the recommended Phase 2 dose, schedule and route of administration, as well as optimal T cell selection. Results from this study have laid the foundation for 3
new MB-101 studies:

1. MB-101  with  or  without  nivolumab  and  ipilimumab  in  treating  patients  with  recurrent  or  refractory  glioblastoma  (currently  enrolling  patients;  ClinicalTrials.gov

Identifier: NCT04003649)

2. MB-101 in treating patients with recurrent or refractory glioblastoma with a substantial component of leptomeningeal disease (expected to open for enrollment in the

second half of 2020)

3. MB-101 in combination with the C134 oncolytic virus (MB-108) in treating patients with recurrent or refractory glioblastoma (expected to open for enrollment in the

first half of 2021)

7

 
 
 
 
 
 
 
 
 
 
 
 
MB-103 (HER2 CAR T for GBM & Metastatic Breast Cancer to Brain)

HER2/neu (“HER2”) is a growth-promoting protein on the outside of all breast cells. Breast cancer cells with higher than normal levels of HER2 are called HER2-positive
(“HER2+”). These cancers tend to grow and spread faster than other breast cancers. Breast cancer is the most commonly diagnosed cancer in women, with over 42,000 women
in  the  United  States  expected  to  die  from  advanced  metastatic  disease  in  2020. Approximately  20%  to  25%  of  breast  cancers  overexpress  HER2,  which  is  an  established
therapeutic target of both monoclonal antibodies (mAbs) and receptor tyrosine kinase inhibitors. With the advent of effective mAbs directed against HER2, the median overall
survival  of  patients  with  metastatic  HER2+  breast  cancer  has  improved.  However,  management  of  metastatic  disease  in  the  brain  and/or  CNS  –  observed  in  up  to  50%  of
HER2+  breast  cancer  patients  –  continues  to  be  a  clinical  challenge  in  large  part  due  to  the  inability  of  mAbs  to  sufficiently  cross  the  blood-brain  barrier. Although  small-
molecule inhibitors of HER2 exist and have been clinically approved, their single-agent efficacy in the context of metastatic disease to the brain has been limited. While HER2-
targeted  therapy  in  combination  with  conventional  agents  has  shown  some  promise  for  the  treatment  of  patients  with  metastatic  breast  cancer,  control  of  brain  metastases
remains a significant unmet clinical need, as most patients survive less than two years following CNS involvement. Recent advances in cellular immunotherapy approaches
have  underscored  the  potential  for  potent  antitumor  immune  responses  and  clinical  benefit  against  solid  cancers,  and  these  approaches  may  be  effective  in  the  treatment  of
HER2+ cancers – in particular breast cancer – that have metastasized to the brain. Likewise, HER2 has been suggested as a suitable target for GBM, wherein elevated HER2
protein levels have been correlated with impaired survival.

CAR-based T-cell immunotherapy is being actively investigated for the treatment of solid tumors, including HER2+ cancers. Our academic partners at COH have developed a
second-generation  HER2-specific  CAR  T-cell  for  the  treatment  of  brain  and/or  leptomeningeal  metastases  from  HER2  positive  cancers,  as  well  as  for  the  treatment  of
refractory/relapsed  HER2+  GBM.  COH’s  preclinical  data  demonstrate  effective  targeting  of  breast  cancer  brain  metastases  with  intraventricular  delivery  of  CAR  T  cells
expressing HER2-CARs that contain the 4-1BB costimulatory domain. COH is evaluating the safety of this HER2-specific CAR T cell therapy in two Phase 1 clinical trials that
commenced  in  the  fourth  quarter  of  2018  (ClinicalTrials.gov  Identifier:  NCT03389230  for  HER2+  GBM;  ClinicalTrials.gov  Identifier:  NCT03696030  for  HER2+  brain
metastases).

MB-105 (PSCA CAR T for Prostate & Pancreatic Cancers)

PSCA is a glycosylphosphatidylinositol-anchored cell membrane glycoprotein. In addition to being highly expressed in the prostate it is also expressed in the bladder, placenta,
colon, kidney, and stomach. This gene is upregulated in a large proportion of prostate cancers and is also detected in cancers of the bladder and pancreas. The gene includes a
polymorphism that results in an upstream start codon in some individuals; this polymorphism is thought to be associated with a risk for certain gastric and bladder cancers.
Prostate  cancer  may  be  amenable  to  T  cell-based  immunotherapy  since  several  tumor  antigens,  including  prostate  stem-cell  antigen  (“PSCA”),  are  widely  overexpressed  in
metastatic disease. Our academic partners at COH have developed a second-generation PSCA-specific CAR T cell therapy that has demonstrated robust in vitro  and in  vivo
anti-tumor activity in patient-derived, clinically relevant, bone-metastatic prostate cancer xenograft models. COH is evaluating the safety of this PSCA-specific CAR T cell
therapy in a Phase 1 trial treating patients with PSCA+ metastatic castration-resistant prostate cancer (ClinicalTrials.gov Identifier: NCT03873805).

Technology to Convert GBM from an Immunologically Cold Tumor to an Immunologically Hot Tumor

MB-108 (HSV-1 oncolytic virus C134)

C134 is a next-generation oncolytic herpes simplex virus (“oHSV”) that is conditionally replication competent; that is, it can replicate in tumor cells, but not in normal cells,
thus killing the tumor cells directly through this process. Replication of C134 in the tumor itself not only kills the infected tumor cells but causes the tumor cell to act as a factory
to produce new virus. These virus particles are released as the tumor cell dies and can then proceed to infect other tumor cells in the vicinity and continue the process of tumor
kill. In addition to this direct oncolytic activity, the virus promotes an immune response against surviving tumor cells, which increases the antitumor effect of the therapy. The
virus expresses a gene from another virus from the same overall virus family, human cytomegalovirus, that allows it to replicate better in the tumor cells than its first-generation
predecessors. However, the virus has also been genetically engineered to minimize the production of any toxic effects for the patient receiving the therapy.

To improve this virus over its first-generation predecessors, modifications have focused on improving viral replication, spread within the tumor bed, and enhancing bystander
damage to uninfected tumor cells. These effects cumulatively should result in converting an  immunologically  cold  tumor  to  an  immunologically  hot  tumor,  which  Mustang
anticipates will increase the efficacy of its IL13Rα2-directed CAR T for the treatment of GBM.

UAB  is  the  clinical  trial  site  for  the  Phase  1  trial  of  MB-108,  and  they  have  initiated  a  Phase  1  trial  that  began  enrolling  patients  in  2019  (ClinicalTrials.gov  Identifier:
NCT03657576).  The  primary  objective  of  this  study  is  to  determine  the  safety  and  tolerability  of  stereotactic  intracerebral  injections  of  escalating  doses  of  MB-108  and  to
determine the maximally tolerated dose (“MTD”) of the oncolytic virus. Secondary objectives are to obtain preliminary information about the potential benefit of MB-108 in the
treatment of patients with recurrent malignant gliomas, including relevant data on markers of efficacy, including time to tumor progression and patient survival. In the second
half of 2020, Mustang intends to combine MB-108 with MB-101 to potentially enhance efficacy in treating GBM.

8

 
 
 
 
 
 
 
 
 
 
 
 
INTELLECTUAL PROPERTY AND PATENTS 

General

Our goal is to obtain, maintain and enforce patent protection for our products, formulations, processes, methods and other proprietary technologies, preserve our trade secrets,
and operate without infringing on the proprietary rights of other parties, both in the U.S. and in other countries. Our policy is to actively seek to obtain, where appropriate, the
broad intellectual property protection for our product candidates, proprietary information and proprietary technology through a combination of contractual arrangements and
patents, both in the U.S. and elsewhere in the world.

We also depend upon the skills, knowledge and experience of our scientific and technical personnel, as well as that of our advisors, consultants and other contractors (“know-
how”). To help protect our proprietary know-how which is not patentable, and for inventions for which patents may be difficult to enforce, we rely on trade secret protection and
confidentiality agreements to protect our interests. To this end, we require all employees, consultants, advisors and other contractors to enter into confidentiality agreements
which prohibit the disclosure of confidential information and, where applicable, require disclosure and assignment to us of the ideas, developments, discoveries and inventions
that they generate or make, and which are important to our business.

Patents  and  other  proprietary  rights  are  crucial  to  the  development  of  our  business.  We  will  be  able  to  protect  our  proprietary  technologies  from  unauthorized  use  by  third
parties only to the extent that our proprietary rights are covered by valid and enforceable patents, supported by regulatory exclusivity or are effectively maintained as trade
secrets. We have a few patents and patent applications related to our compounds and other technology, but we cannot guarantee the scope of protection of the issued patents, or
that such patents will survive a validity or enforceability challenge, or that any of the pending patent applications will issue as patents.

Generally, patent applications in the U.S. are maintained in secrecy for a period of 18 months or more. There is even an opportunity under specific circumstances to keep the
contents of patent applications hidden until the patent application matures to an issued patent. The patent positions of biotechnology and pharmaceutical companies are highly
uncertain and involve complex legal and factual questions. Therefore, we cannot predict the breadth of claims allowed in biotechnology and pharmaceutical patents, or their
enforceability. To date, there has been no consistent policy regarding the breadth of claims allowed in biotechnology patents. Third parties or competitors may challenge or
circumvent our patents or patent applications, if issued. If our competitors prepare and file patent applications in the U.S. that claim technology also claimed by us, we may have
to participate in interference or derivation proceedings declared by the U.S. Patent and Trademark Office (“USPTO”) to determine priority of invention, which could result in
substantial cost, even if the eventual outcome is favorable to us. Because of the extensive time required for development, testing and regulatory review of a potential product, it
is possible that before we commercialize any of our products, any related patent may expire or remain in existence for only a short period following commercialization, thus
reducing any advantage of the patent. However, the life of a patent covering a product that has been subject to regulatory approval may have the ability to be extended through
the patent restoration program, although any such extension could still be minimal. Additionally, statutory caps impose further limitation on any such extensions.

If a patent is issued to a third party containing one or more preclusive or conflicting claims, and those claims are ultimately determined to be valid and enforceable, we may be
required to obtain a license, if available, under such patent or to develop or obtain alternative technology. In the event of litigation involving a third-party claim, an adverse
outcome in the litigation could subject us to significant liabilities to such third party, require us to seek a license for the disputed rights from such third party, and/or require us to
cease use of the technology. Further, our breach of an existing license or failure to obtain a license to technology required to commercialize our products may seriously harm
our business. We also may need to commence litigation to enforce any patents issued to us or to determine the scope and validity of third-party proprietary rights. Litigation
would not only involve substantial costs but would also involve substantial time commitments on the part of our key executives and research and development personnel.

In March 2015, we licensed intellectual property related to CAR T technology from COH. The intellectual property licensed thereunder includes two granted U.S. patents and
pending patent applications in a number of countries, including the U.S. and the EU, as well as pending patent applications in Japan, China, South Korea, Australia and the
developing world. These granted patents include claims directed to nucleic acids and expression vectors encoding CARs targeting IL13Rα2 and CD123. The granted patents and
any patents maturing from these pending applications will expire no sooner than October 2033. The pending applications in these patent families also include various claims
relating to CARs, T cells that express the CARs, methods of treatment utilizing the CAR T cells and additional specific features to optimize administration of CAR T cells,
targeting, binding specificity, cell stimulation and persistence. Additional applications and pending claims from COH that we have rights to include the use of an optimized
hinge region for many targeted CAR constructions, along with compositions and methods to isolate and transfect T memory cells to improve cellular persistence, as well as
applications and claims related to CS1-, HER2-, and PSCA-targeted CARs.

Also, in March 2015, we executed a sponsored research agreement with COH, pursuant to which research is performed in the laboratory of Drs. Stephen Forman and Christine
Brown. The sponsored research agreement gives us the right to first negotiation under specified maximum terms regarding any future inventions arising from the laboratory.

In May 2017, we licensed intellectual property related to CAR T technology for targeting CD20 from Fred Hutch. The intellectual property includes an international application
under the Patent Cooperation Treaty (i.e., a PCT application), which has now entered the national stage of multiple countries including the U.S., EU, Japan, China, and Canada,
among others. These applications contain claims relating to various CD20-targeting CAR constructs and CAR T cells, as well as methods of making and using the same. In May
2018, national stage applications claiming priority to the PCT application were filed in several jurisdictions around the world, including the U.S. and Europe, in order to begin
substantive examination of the claims. Patents maturing from these national stage applications will expire no sooner than March 2037.

9

 
 
 
 
 
 
 
 
 
 
 
 
In  March  2017,  we  licensed  intellectual  property  related  to  antibodies  and  binding  agents  that  specifically  bind  to  PSCA  from  the  University  of  California  Los Angeles
(“UCLA”). The intellectual property includes multiple granted patents and pending applications from around the world including the U.S., EU, Japan, China, and Canada. The
granted patents and patents maturing from the pending applications will expire no sooner than March 2027.

In August 2018, we licensed from St. Jude Children’s Research Hospital XSCID Technology related to an ex vivo lentiviral vector gene therapy program to provide a normal
copy of the IL2RG gene to patients born with XSCID.

In February 2019, we licensed Material and Technical Information related to the HSV-1 oncolytic virus C134 from Nationwide in Columbus, Ohio.

In August 2019, we licensed from CSL Behring (Calimmune) the CytegrityTM stable producer cell line developed and used by St. Jude. The Cytegrity™ stable producer cell
line will be used to produce the viral vector for MB-107.

In addition to the technology the company has in-licensed, Mustang has also developed its own proprietary intellectual property, both alone and in conjunction with COH. In
particular, Mustang filed a U.S. provisional application directed to optimized methods for manufacturing cell-based therapeutics, and Mustang and COH, as co-applicants, filed
a U.S. provisional application directed to methods of treating hematological cancers.

Other Intellectual Property Rights

We depend upon trademarks, trade secrets, knowhow and continuing technological advances to develop and maintain our competitive position. To maintain the confidentiality
of  trade  secrets  and  proprietary  information,  we  require  our  employees,  scientific  advisors,  consultants  and  collaborators,  upon  commencement  of  a  relationship  with  us,  to
execute confidentiality agreements and, in the case of parties other than our research and development collaborators, to agree to assign their inventions to us. These agreements
are designed to protect our proprietary information and to grant us ownership of technologies that are developed in connection with their relationship with us. These agreements
may not, however, provide protection for our trade secrets in the event of unauthorized disclosure of such information.

In addition to patent protection, we may utilize orphan drug regulations or other provisions of the Food, Drug and Cosmetic Act of 1938, as amended (the “FDCA”), to provide
market  exclusivity  for  certain  of  our  product  candidates.  Orphan  drug  regulations  provide  incentives  to  pharmaceutical  and  biotechnology  companies  to  develop  and
manufacture drugs for the treatment of rare diseases, currently defined as diseases that exist in fewer than 200,000 individuals in the U.S., or diseases that affect more than
200,000 individuals in the U.S. but for which the sponsor does not realistically anticipate will generate a net profit. Under these provisions, a manufacturer of a designated
orphan drug can seek tax benefits, and the holder of the first approval of a designated orphan product from the FDA will be granted a seven-year period of marketing exclusivity
for such FDA approved orphan product.

LICENSE, CLINICAL TRIAL AND SPONSORED RESEARCH AGREEMENTS

St. Jude Children’s Research Hospital License

On August 2, 2018, the Company entered into an exclusive worldwide license agreement with St. Jude for the development of a first-in-class ex vivo lentiviral gene therapy for
the treatment of XSCID. The Company paid $1.0 million in consideration for the exclusive license in addition to an annual maintenance fee of $0.1 million (beginning in 2019).
St. Jude is eligible to receive payments totaling $13.5 million upon the achievement of five development and commercialization milestones. Royalty payments in the mid-single
digits are due on net sales of licensed products.

City of Hope Licenses

In February 2017, the Company and COH amended and restated their license agreement, dated March 17, 2015 (the “Original Agreement”), by entering into three separate
amended and restated exclusive license agreements, one relating to the CD123-directed CAR T program, one relating to the IL13Rα2-directed CAR T program, and one relating
to the Spacer technology (described below). The total potential consideration payable to COH by the Company, in equity or cash, did not in the aggregate change materially
from  the  Original  Agreement.  As  of  December  31,  2019,  COH  owns  845,385  shares  of  Class  A  common  stock  and  448,203  shares  of  common  stock,  representing
approximately 3.2% of ownership, and has the right to appoint a director to the Board of Directors (the “Board”). The Company considers COH to be a related party, due to the
foregoing rights and ownership, as well as the high proportion of the Company’s assets that are licensed from COH.

10

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
In addition, the Company entered into a sponsored research agreement with COH under which the Company has and will fund continued research in the amount of $2.0 million
per year, payable in four equal installments, through the first quarter of 2020. The research covered under this arrangement is for the IL13Rα2-directed CAR T program, the
CD123-directed CAR T program, and the Spacer technology.

CD123 License

In February 2017, the Company entered into an Amended and Restated Exclusive License Agreement with COH to acquire intellectual property rights pertaining to patent rights
related to the CD123-directed CAR T program (the “CD123 License”). Pursuant to the CD123 License, the Company and COH acknowledged that an upfront fee had already
been paid under the Original Agreement. In addition, COH is eligible to receive an annual maintenance fee of $25,000 and milestone payments totaling up to approximately
$14.5 million, upon and subject to the achievement of certain milestones. Royalty payments in the mid-single digits are due on net sales of licensed products. The Company is
obligated to pay COH a percentage of certain revenues received in connection with a sublicense ranging from the mid-teens to mid-thirties, depending on the timing of the
sublicense in the development of any product. In addition, equity grants made under the Original Agreement were acknowledged, and the anti-dilution provisions of the Original
Agreement were carried forward.

CD123 CRA

In February 2017, the Company entered into a Clinical Research Support Agreement for CD123-directed CAR T program (the “CD123 CRA”). Pursuant to the terms of the
CD123 CRA, the Company made an upfront payment of $19,450 and will contribute an additional $97,490 per patient in connection with the on-going investigator-initiated
study. Further, the Company agreed to fund approximately $76,000 annually pertaining to the clinical development of CD123.

IL13Rα2 License

In February 2017, the Company entered into an Amended and Restated Exclusive License Agreement with COH to acquire intellectual property rights pertaining to patent rights
related to the IL13Rα2-directed CAR T program (the “IL13Rα2 License”). Pursuant to the IL13Rα2 License, the Company and COH acknowledged that an upfront fee had
already  been  paid  under  the  Original  Agreement.  In  addition,  COH  is  eligible  to  receive  an  annual  maintenance  fee  of  $25,000  and  milestone  payments  totaling  up  to
approximately $14.5 million, upon and subject to the achievement of certain milestones. Royalty payments in the mid-single digits are due on net sales of licensed products. The
Company is obligated to pay COH a percentage of certain revenues received in connection with a sublicense ranging from the mid-teens to mid-thirties, depending on the timing
of the sublicense in the development of any product. In addition, equity grants made under the Original Agreement were acknowledged, and the anti-dilution provisions of the
Original Agreement were carried forward.

IL13Rα2 CRA

In February 2017, the Company entered into a Clinical Research Support Agreement for the IL13Rα2-directed CAR T program (the “IL13Rα2 CRA”). Pursuant to the terms of
the IL13Rα2 CRA, the Company made an upfront payment of approximately $9,300 and will contribute an additional $136,311 per patient in connection with the on-going
investigator-initiated study. Further, the Company agreed to fund approximately $66,000 annually pertaining to the clinical development of IL13Rα2.

Spacer License

In February 2017, the Company entered into an Amended and Restated Exclusive License Agreement with COH to acquire intellectual property rights pertaining to patent rights
related to Spacer (the “Spacer License”). Pursuant to the Spacer License, the Company and COH acknowledged that an upfront fee had already been paid under the Original
Agreement. In addition, COH will receive an annual maintenance fee of $10,000. No royalties are due if the Spacer technology is used in conjunction with a CD123 CAR or an
IL13Rα2 CAR, and royalty payments in the low single digits are due on net sales of licensed products if the Spacer technology is used in conjunction with other intellectual
property. The Company is obligated to pay COH a percentage of certain revenues received in connection with a sublicense in the mid-thirties, but no such payments are due in
connection with sublicenses that are granted in conjunction with the sublicense other CARs that are licensed from COH to the Company. In addition, equity grants made under
the Original Agreement were acknowledged, and the anti-dilution provisions of the Original Agreement were carried forward.

IV/ICV License

In  February  2017,  the  Company  entered  into  an  exclusive  license  agreement  (the  “IV/ICV  License”)  with  COH  to  acquire  intellectual  property  rights  in  patent  applications
related to the intraventricular and intracerebroventricular methods of delivering T cells that express CARs. Pursuant to the IV/ICV License, in March 2017, the Company paid
COH an upfront fee of $0.1 million. COH is eligible to receive a milestone payment totaling approximately $0.1 million, upon and subject to the achievement of a milestone,
and an annual maintenance fee. Royalty payments in the low single digits are due on net sales of licensed products. The Company is obligated to pay COH a percentage of
certain revenues received in connection with a sublicense in the mid-thirties, but no such payments are due in connection with sublicenses that are granted in conjunction with
the sublicense other CARs that are licensed from COH to the Company

11

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
HER2 Technology License

On  May  31,  2017,  the  Company  entered  into  an  exclusive  license  agreement  (the  “HER2  Agreement”)  with  COH  for  the  use  of  HER2  CAR  T  technology  (“HER2
Technology”), which is currently being applied in the treatment of glioblastoma multiforme and in the treatment of HER2+ cancers – in particular breast cancer – that have
metastasized to the brain. Pursuant to the HER2 Agreement, the Company paid an upfront fee of $0.6 million and owes an annual maintenance fee of $50,000 (which began in
2019). In addition, COH is eligible to receive milestone payments totaling up to $14.9 million, upon and subject to the achievement of certain milestones. Royalty payments in
the mid-single digits are due on net sales of licensed products. The Company is obligated to pay COH a percentage of certain revenues received in connection with a sublicense
ranging from the mid-teens to mid-thirties, depending on the timing of the sublicense in the development of any product.

CS1 Technology License

On  May  31,  2017,  the  Company  entered  into  an  exclusive  license  agreement  (the  “CS1  Agreement”)  with  COH  for  the  use  of  CS1-specific  CAR  T  technology  (“CS1
Technology”), which is currently being applied in the treatment of multiple myeloma. Pursuant to the CS1 Agreement, the Company paid an upfront fee of $0.6 million and
owes an annual maintenance fee of $50,000 (which began in 2019). In addition, COH is eligible to receive milestone payments totaling up to $14.9 million, upon and subject to
the achievement of certain milestones. Royalty payments in the mid-single digits are due on net sales of licensed products. The Company is obligated to pay COH a percentage
of certain revenues received in connection with a sublicense ranging from the mid-teens to mid-thirties, depending on the timing of the sublicense in the development of any
product.

PSCA Technology License

On  May  31,  2017,  the  Company  entered  into  an  exclusive  license  agreement  (the  “PSCA  Agreement”)  with  COH  for  the  use  of  PSCA  CAR  T  technology  (“PSCA
Technology”), which is currently being applied in the treatment of PSCA+ metastatic castration-resistant prostate cancer. Pursuant to the PSCA Agreement, the Company paid
an upfront fee of $0.3 million and owes an annual maintenance fee of $50,000 (which began in 2019). In addition, COH is eligible to receive milestone payments totaling up to
$14.9 million, upon and subject to the achievement of certain milestones. Royalty payments in the mid-single digits are due on net sales of licensed products. The Company is
obligated to pay COH a percentage of certain revenues received in connection with a sublicense ranging from the mid-teens to mid-thirties, depending on the timing of the
sublicense in the development of any product.

Manufacturing License

On  January  3,  2018,  the  Company  entered  into  a  non-exclusive  license  agreement  with  COH  to  acquire  patent  and  licensed  know-how  rights  related  to  developing,
manufacturing, and commercializing licensed products. The Company paid $75,000 in consideration for the licenses to the patent rights and the licensed know-how in addition
to an annual maintenance fee. Royalty payments in the low-single digits are due on net sales of licensed products.

City of Hope SRA

On January 3, 2018, the Company entered into a Sponsored Research Agreement (“SRA”) with COH to optimize and develop CAR T cell processing procedures. Pursuant to
the  SRA,  the  Company  funded  continued  research  in  the  amount  of  $0.9  million  for  the  program,  with  an  initial  term  of  two  (2)  years.  Mustang  and  COH  are  currently
negotiating a possible extension for an additional two-year period.

University of California License

On March 17, 2017, the Company entered into an exclusive license agreement with the Regents of UCLA (the “UCLA License”) to acquire intellectual property rights in patent
applications related to the engineered anti-prostate stem cell antigen antibodies for cancer targeting and detection. Pursuant to the UCLA License, the Company paid UCLA the
upfront fee of $0.2 million and owes an annual maintenance fee of $15,000 for the first two years, $25,000 for years three and four, and $50,000 per year thereafter. In addition,
UCLA is eligible to receive milestone payments totaling up to $14.3 million, upon and subject to the achievement of certain milestones. Royalty payments in the mid-single
digits are due on net sales of licensed products.

Fred Hutchinson Cancer Research Center License

CD20 Technology License

Effective  July  3,  2017,  Mustang  entered  into  an  exclusive,  worldwide  licensing  agreement  with  Fred  Hutch  for  the  use  of  a  CAR  T  therapy  related  to  autologous  T  cells
engineered to express a CD20-specific chimeric antigen receptor (the “CD20 Technology License”). Pursuant to the CD20 Technology License, the Company paid Fred Hutch
an upfront fee of $0.3 million and owes an annual maintenance fee of $50,000 on each anniversary of the license until the achievement by the Company of regulatory approval
of a licensed product using the CD20 Technology. Additional payments are due for the achievement of eleven development milestones totaling $39.1 million. Royalty payments
in the mid-single digits are due on net sales of licensed products.

12

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CD20 CTA

Also, on July 3, 2017, in conjunction with the CD20 Technology License from Fred Hutch, Mustang entered into an investigator-initiated clinical trial agreement (the “CD20
CTA”) to provide partial funding for a Phase 1/2 clinical trial at Fred Hutch evaluating the safety and efficacy of the CD20 Technology in patients with relapsed or refractory B-
cell non-Hodgkin lymphomas. In connection with the CD20 CTA, the Company agreed to fund up to $5.3 million of costs associated with the clinical trial, which commenced
during the fourth quarter of 2017.

Fred Hutchinson Cancer Research Center SRA

On March 17, 2018, the Company entered into an SRA with Fred Hutch related to developing and optimizing processes and systems associated with CD20 cell processing.
Pursuant to the SRA, the Company funded continued research in the amount of $0.6 million during the term of the SRA, which expired in March 2019.

Nationwide Children’s Hospital License

On February 20, 2019, the Company entered into an exclusive worldwide license agreement with Nationwide for the development of an oncolytic virus (C134) for the treatment
of glioblastoma multiforme. The Company paid $0.2 million in consideration for the exclusive  license.  Nationwide  is  eligible  to  receive  additional  payments  totaling  $77.5
million upon the achievement of ten development and commercialization milestones. Royalty payments in the low-single digits are due on net sales of licensed products.

CSL Behring (Calimmune) License

On August  23,  2019,  the  Company  entered  into  a  non-exclusive  license  agreement  with  CSL  Behring  (Calimmune)  for  the  CytegrityT M stable  producer  cell  line  for  the
production of MB-107 lentiviral gene therapy. The Cytegrity™ stable producer cell line will be used to produce the viral vector for Mustang’s MB-107 lentiviral gene therapy
program for the treatment of X-linked severe combined immunodeficiency (XSCID). Mustang licensed MB-107 from St. Jude in August 2018. The Company paid $0.2 million
in  consideration  for  the  license.  CSL  Behring  (Calimmune)  is  eligible  to  receive  additional  payments  totaling  $1.2  million  upon  the  achievement  of  three  development  and
commercialization milestones. Royalty payments in the low-single digits are due on net sales of licensed products.

COMPETITION

Competition  in  the  pharmaceutical  and  biotechnology  industries  is  intense.  Our  competitors  include  pharmaceutical  companies  and  biotechnology  companies,  as  well  as
universities and public and private research institutions. In addition, companies that are active in different but related fields represent substantial competition for us. Many of
our  competitors  have  significantly  greater  capital  resources,  larger  research  and  development  staffs  and  facilities  and  greater  experience  in  drug  development,  regulation,
manufacturing and marketing than we do. These organizations also compete with us to recruit qualified personnel, attract partners for joint ventures or other collaborations, and
license  technologies  that  are  competitive  with  ours.  To  compete  successfully  in  this  industry,  we  must  identify  novel  and  unique  drugs  or  methods  of  treatment  and  then
complete the development of those drugs as treatments in advance of our competitors.

13

 
 
 
 
 
 
 
 
 
 
 
 
The  drugs  that  we  are  attempting  to  develop  will  have  to  compete  with  existing  therapies.  In  addition,  a  large  number  of  companies  are  pursuing  the  development  of
pharmaceuticals  that  target  the  same  conditions  that  we  are  targeting.  Other  companies  have  products  or  product  candidates  in  various  stages  of  pre-clinical  or  clinical
development, or with marketing approvals, to treat conditions for which we are also seeking to discover and develop product candidates. Some of these potential competing
drugs are further advanced in development than our product candidates and may be commercialized earlier.

The field of CAR T therapy is extremely active. Companies and partnerships currently engaged in clinical trials with CAR T modalities include Bristol Myers Squibb, Novartis
Pharmaceuticals/University of Pennsylvania, Bluebird Bio, Allogene Therapeutics, Cellectis, Gilead Sciences, Bellicum Pharmaceuticals, MD Anderson/Ziopharm Oncology,
Atara Biotherapeutics, Celyad, Autolus Therapeutics, Precigen and Precision BioSciences.

The gene therapy field is characterized by rapidly changing technologies, significant competition and a strong emphasis on intellectual property. We are aware of companies
currently  engaged  in  developing  gene  therapies  in  various  indications,  including Abeona  Therapeutics, Adverum  Biotechnologies, Astellas, AVROBIO, Axovant  Sciences,
Biogen,  Bluebird  Bio,  BioMarin  Pharmaceutical,  Homology  Medicines,  Krystal  Biotech,  MeiraGTx,  Novartis  Pharmaceuticals,  Orchard  Therapeutics,  Passage  Bio,  Prevail
Therapeutics,  REGENXBIO,  Rocket  Pharmaceuticals,  Roche,  Sangamo  Therapeutics,  Sarepta  Therapeutics,  Solid  Biosciences,  Ultragenyx  Pharmaceuticals,  uniQure  and
Voyager Therapeutics, as well as several companies addressing other methods for delivering or modifying genes and regulating gene expression.

EMPLOYEES

As of December 31, 2019, we had fifty-one full-time employees. None of our employees are represented by a labor union or covered under a collective bargaining agreement
and  we  consider  our  employee  relations  to  be  good.  Employees  of  Fortress  also  make  valuable  financial,  legal,  scientific  and  other  strategic  contributions  to  Mustang  on  a
regular basis.

SUPPLY AND MANUFACTURING

As an early stage development company, we rely on our research partners to manufacture all materials currently used in the clinical development programs we are sponsoring at
COH, Fred Hutch, St. Jude, and UAB under the IND applications filed by these institutions. UAB is the clinical trial site for the Phase 1 trial of Nationwide’s C134 oncolytic
virus (MB-108). Pursuant to the March 2015 Licensing Agreement with COH, we have the right to make and have made the products, and we have negotiated Investigator-
Initiated Clinical Research Support Agreements with COH and Fred Hutch which specify the manufacturing costs and numbers of patients which will be supplied under filed
protocols.  Our  research  partners  have  extensive  experience  manufacturing  clinical  materials  for  development  studies,  but  we  are  currently  dependent  on  both  their  capacity
limitations and continued operating success to manufacture viral vector and to process cells for all CAR T clinical trials for which these partners hold the INDs, as well as to
have manufactured oncolytic virus for the MB-108 investigator-IND clinical trial being conducted at UAB.

We have limited experience in processing cells for clinical or commercial purposes. In 2018 we opened our own cell processing facility in Worcester, Massachusetts, in order to
manufacture and supply product candidates for all clinical trials that will be conducted under IND applications to be filed by us. In August 2019, the FDA approved our IND
application to initiate a multi-center Phase 1/2 clinical trial of MB-102 (CD123 CAR T). As with any supply program, obtaining raw materials of the correct quality cannot be
guaranteed, and we cannot ensure that we will be successful in this endeavor.

We expect to rely on contract manufacturing relationships for lentiviral vectors and for the MB-108 oncolytic virus, as well as for any non-CAR T products that we may in-
license or acquire in the future for co-administration with our CAR T products. However, there can be no assurance that we will be able to successfully contract with such
manufacturers on terms acceptable to us, or at all.

Contract manufacturers for these current and potential future non-CAR T products would be subject to ongoing periodic and unannounced inspections by the FDA, the U.S.
Drug Enforcement Administration (“DEA”) and corresponding state agencies to ensure strict compliance with the Current Good Manufacturing Practice regulations (“cGMP”)
and  other  state  and  federal  regulations.  Our  contractors,  if  any,  in  Europe  would  face  similar  challenges  from  the  numerous  EU  and  member  state  regulatory  agencies  and
authorized bodies. We do not have control over third-party manufacturers’ compliance with these regulations and standards, other than through contractual obligations. If they
are deemed out of compliance with cGMPs, product recalls could result, inventory could be destroyed, production could be stopped, and supplies could be delayed or otherwise
disrupted.

If we need to change manufacturers for these current and potential future non-CAR T products after commercialization, the FDA and corresponding foreign regulatory agencies
must approve these new manufacturers in advance, which will involve testing and additional inspections to ensure compliance with FDA regulations and standards and may
require significant lead times and delay. Furthermore, switching manufacturers may be difficult because the number of potential manufacturers is limited. It may be difficult or
impossible for us to find a replacement manufacturer quickly or on terms acceptable to us, or at all.

GOVERNMENT AND INDUSTRY REGULATIONS

Numerous  governmental  authorities,  principally  the  FDA  and  corresponding  state  and  foreign  regulatory  agencies,  impose  substantial  regulations  upon  the  clinical
development,  manufacture  and  marketing  of  our  product  candidates,  as  well  as  our  ongoing  research  and  development  activities.  None  of  our  product  candidates  has  been
approved for sale in any market in which we have marketing rights. Before marketing in the U.S., any drug that we develop must undergo rigorous pre-clinical testing and
clinical trials and an extensive regulatory approval process implemented by the FDA under the FDCA. The FDA regulates, among other things, the pre-clinical and clinical
testing, safety, efficacy, approval, manufacturing, record keeping, adverse event reporting, packaging, labeling, storage, advertising, promotion, export, sale and distribution of
biopharmaceutical products.

14

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The regulatory review and approval process is lengthy, expensive and uncertain. We are required to submit extensive preclinical and clinical data and supporting information to
the FDA for each indication or use to establish a product candidate’s safety and efficacy before we can secure FDA approval to market or sell a product in the U.S. The approval
process  takes  many  years,  requires  the  expenditure  of  substantial  resources  and  may  involve  ongoing  requirements  for  post-marketing  studies  or  surveillance.  Before
commencing clinical trials in humans, we must submit an IND to the FDA containing, among other things, preclinical data, chemistry, manufacturing and control information,
and an investigative plan. Our submission of an IND may not result in FDA authorization to commence a clinical trial.

The FDA may permit expedited development, evaluation, and marketing of new therapies intended to treat persons with serious or life-threatening conditions for which there is
an unmet medical need under its fast track drug development programs. A sponsor can apply for fast track designation at the time of submission of an IND, or at any time prior
to  receiving  marketing  approval  of  the  new  drug  application  (“NDA”)  or  biologics  license  application  (“BLA”).  To  receive  fast  track  designation,  an  applicant  must
demonstrate:

·

·

·

that the therapy is intended to treat a serious or life-threatening condition;

that the therapy is intended to treat a serious aspect of the condition; and

that the therapy has the potential to address unmet medical needs, and this potential is being evaluated in the planned drug development program.

The  FDA  must  respond  to  a  request  for  fast  track  designation  within  60  calendar  days  of  receipt  of  the  request.  Over  the  course  of  development,  a  product  in  a  fast  track
development program must continue to meet the criteria for fast track designation. Sponsors of products in fast track drug development programs must be in regular contact with
the reviewing division of the FDA to ensure that the evidence necessary to support marketing approval will be developed and presented in a format conducive to an efficient
review. Sponsors of products in fast track drug development programs ordinarily are eligible for priority review of a completed application in six months or less and also may be
permitted to submit portions of an NDA or BLA to the FDA for review before the complete application is submitted.

Sponsors  of  drugs  designated  as  fast  track  also  may  seek  approval  under  the  FDA’s  accelerated  approval  regulations.  Under  this  authority,  the  FDA  may  grant  marketing
approval  for  a  new  drug  product  on  the  basis  of  adequate  and  well-controlled  clinical  trials  establishing  that  the  drug  product  has  an  effect  on  a  surrogate  endpoint  that  is
reasonably likely, based on epidemiologic, therapeutic, pathophysiologic, or other evidence, to predict clinical benefit or on the basis of an effect on a clinical endpoint other
than survival or irreversible morbidity. Approval will be subject to the requirement that the applicant study the drug further to verify and describe its clinical benefit where there
is uncertainty as to the relation of the surrogate endpoint to clinical benefit or uncertainty as to the relation of the observed clinical benefit to ultimate outcome. Post-marketing
studies  are  usually  underway  at  the  time  an  applicant  files  the  NDA.  When  required  to  be  conducted,  such  post-marketing  studies  must  also  be  adequate  and  well-
controlled.  The  applicant  must  carry  out  any  such  post-marketing  studies  with  due  diligence.  Many  companies  who  have  been  granted  the  right  to  utilize  an  accelerated
approval approach have failed to obtain approval. Moreover, negative or inconclusive results from the clinical trials we hope to conduct or adverse medical events could cause
us to have to repeat or terminate the clinical trials. Accordingly, we may not be able to complete the clinical trials within an acceptable time frame, if at all, and, therefore, could
not submit the NDA or BLA to the FDA or foreign regulatory authorities for marketing approval.

Clinical  testing  must  meet  requirements  for  institutional  review  board  oversight,  informed  consent  and  good  clinical  practices,  and  must  be  conducted  pursuant  to  an  IND,
unless exempted.

For purposes of NDA or BLA approval, clinical trials are typically conducted in the following sequential phases:

·

·

·

·

Phase  1:  The  drug  is  administered  to  a  small  group  of  humans,  either  healthy  volunteers  or  patients,  to  test  for  safety,  dosage  tolerance, absorption,  metabolism,
excretion and clinical pharmacology.

Phase 2: Studies are conducted on a larger number of patients to assess the efficacy of the product, to ascertain dose tolerance and the optimal dose range, and to gather
additional data relating to safety and potential adverse events.

Phase 3: Studies establish safety and efficacy in an expanded patient population.

Phase 4: The FDA may require Phase 4 post-marketing studies to find out more about the drug’s long-term risks, benefits, and optimal use, or to test the drug in different
populations.

15

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The length of time necessary to complete clinical trials varies significantly and may be difficult to predict. Clinical results are frequently susceptible to varying interpretations
that may delay, limit or prevent regulatory approvals. Additional factors that can cause delay or termination of our clinical trials, or that may increase the costs of these trials,
include:

·

·

·

·

·

·

slow patient enrollment due to the nature of the clinical trial plan, the proximity of patients to clinical sites, the eligibility criteria for participation in the study or other
factors;

inadequately trained or insufficient personnel at the study site to assist in overseeing and monitoring clinical trials or delays in approvals from a study site’s review board;

longer treatment time required to demonstrate efficacy or determine the appropriate product dose;

insufficient supply of the product candidates;

adverse medical events or side effects in treated patients; and

ineffectiveness of the product candidates.

In addition, the FDA, equivalent foreign regulatory authority, or a data safety monitoring committee for a trial may place a clinical trial on hold or terminate it if it concludes that
subjects are being exposed to an unacceptable health risk, or for futility. Any drug is likely to produce some toxicity or undesirable side effects in animals and in humans when
administered at sufficiently high doses and/or for a sufficiently long period of time. Unacceptable toxicity or side effects may occur at any dose level at any time in the course of
studies in animals designed to identify unacceptable effects of a product candidate, known as toxicological studies, or clinical trials of product candidates. The appearance of
any unacceptable toxicity or side effect could cause us or regulatory authorities to interrupt, limit, delay or abort the development of any of our product candidates and could
ultimately prevent approval by the FDA or foreign regulatory authorities for any or all targeted indications.

Sponsors of drugs may apply for a special protocol assessment (“SPA”) from the FDA. The SPA process is a procedure by which the FDA provides official evaluation and
written guidance on the design and size of proposed protocols that are intended to form the basis for an NDA or BLA. However, final marketing approval depends on the results
of  efficacy,  the  adverse  event  profile  and  an  evaluation  of  the  benefit/risk  of  treatment  demonstrated  in  the  Phase  3  trial.  The  SPA  may  only  be  changed  through  a  written
agreement between the sponsor and the FDA, or if the FDA becomes aware of a substantial scientific issue essential to product safety or efficacy. 

Before receiving FDA approval to market a product, we must demonstrate that the product is safe and effective for its intended use by submitting to the FDA an NDA or BLA
containing the preclinical and clinical data that have been accumulated, together with chemistry and manufacturing and controls specifications and information, and proposed
labeling, among other things. The FDA may refuse to accept an NDA or BLA for filing if certain content criteria are not met and, even after accepting an NDA or BLA, the
FDA may often require additional information, including clinical data, before approval of marketing a product.

It is also becoming more common for the FDA to request a Risk Evaluation and Mitigation Strategy, or REMS, as part of an NDA or BLA. The REMS plan contains post-
market obligations of the sponsor to train prescribing physicians, monitor off-label drug use, and conduct sufficient Phase 4 follow-up studies and registries to ensure the
continued safe use of the drug.

As part of the approval process, the FDA must inspect and approve each manufacturing facility. Among the conditions of approval is the requirement that a manufacturer’s
quality control and manufacturing procedures conform to cGMP. Manufacturers must expend significant time, money and effort to ensure continued compliance, and the FDA
conducts periodic inspections to certify compliance. It may be difficult for our manufacturers or for us to comply with the applicable cGMP, as interpreted by the FDA, and
other FDA regulatory requirements. If we, or our contract manufacturers, fail to comply, then the FDA may not allow us to market products that have been affected by the
failure.

If the FDA grants approval, the approval will be limited to those conditions and patient populations for which the product is safe and effective, as demonstrated through clinical
studies. Further, a product may be marketed only in those dosage forms and for those indications approved in the NDA. Certain changes to an approved NDA, including, with
certain  exceptions,  any  significant  changes  to  labeling,  require  approval  of  a  supplemental  application  before  the  drug  may  be  marketed  as  changed. Any  products  that  we
manufacture or distribute pursuant to FDA approvals are subject to continuing monitoring and regulation by the FDA, including compliance with cGMP and the reporting of
adverse experiences with the drugs. The nature of marketing claims that the FDA will permit us to make in the labeling and advertising of our products will generally be limited
to those specified in FDA approved labeling, and the advertising of our products will be subject to comprehensive monitoring and regulation by the FDA. Drugs whose review
was  accelerated  may  carry  additional  restrictions  on  marketing  activities,  including  the  requirement  that  all  promotional  materials  are  pre-submitted  to  the  FDA.  Claims
exceeding those contained in approved labeling will constitute a violation of the FDCA. Violations of the FDCA or regulatory requirements at any time during the product
development process, approval process, or marketing and sale following approval may result in agency enforcement actions, including withdrawal of approval, recall, seizure of
products, warning letters, injunctions, fines and/or civil or criminal penalties. Any agency enforcement action could have a material adverse effect on our business.

16

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Failure to comply with applicable federal, state and foreign laws and regulations would likely have a material adverse effect on our business. In addition, federal, state and
foreign laws and regulations regarding the manufacture and sale of new drugs are subject to future changes.

Other Healthcare Laws and Compliance Requirements

In the U.S., our activities are potentially subject to regulation by various federal, state and local authorities in addition to the FDA, including the Centers for Medicare and
Medicaid Services (formerly the Health Care Financing Administration), other divisions of the United States Department of Health and Human Services (e.g., the Office of
Inspector General), the United States Department of Justice and individual United States Attorney offices within the Department of Justice, and state and local governments.

Pharmaceutical Coverage, Pricing and Reimbursement

In  the  U.S.  and  markets  in  other  countries,  sales  of  any  products  for  which  we  receive  regulatory  approval  for  commercial  sale  will  depend  in  part  on  the  availability  of
reimbursement from third-party payors, including government health administrative authorities, managed care providers, private health insurers and other organizations. Third-
party payors are increasingly examining the medical necessity and cost-effectiveness of medical products and services, in addition to their safety and efficacy, and, accordingly,
significant  uncertainty  exists  as  to  the  reimbursement  status  of  newly  approved  therapeutics. Adequate  third-party  reimbursement  may  not  be  available  for  our  products  to
enable us to realize an appropriate return on our investment in research and product development. We are unable to predict the future course of federal or state health care
legislation and regulations, including regulations that will be issued to implement provisions of the health care reform legislation enacted in 2010, known as the Affordable Care
Act. The Affordable Care Act and further changes in the law or regulatory framework could have a material adverse effect on our business.

International Regulation

In addition to regulations in the U.S., there are a variety of foreign regulations governing clinical trials and commercial sales and distribution of any product candidates. The
approval process varies from country to country, and the time may be longer or shorter than that required for FDA approval.

Item 1A.

 Risk Factors

Investing in our Common Stock or any other type of equity or debt securities we may offer (together, our “Securities”) involves a high degree of risk. The following information
sets forth risk factors that could cause our actual results to differ materially from those contained in forward-looking statements we have made in this Form 10-K and those we
may  make  from  time  to  time.  You  should  carefully  consider  the  risks  described  below,  in  addition  to  the  other  information  contained  in  this  Form  10-K,  before  making  an
investment decision. Our business, financial condition or results of operations could be harmed by any of these risks. The risks and uncertainties described below are not the
only ones we face. Additional risks not presently known to us or other factors not perceived by us to present significant risks to our business at this time also may impair our
business operations.

Risks Related to Our Business and Industry

We currently have no products for sale. We are heavily dependent on the success of our product candidates, and we cannot give any assurances that any of our product
candidates will receive regulatory approval or be successfully commercialized.

To date, we have invested a significant portion of our efforts and financial resources in the acquisition and development of our product candidates. We have not demonstrated
our ability to perform the functions necessary for the successful acquisition, development or commercialization of the technologies we are seeking to develop. As an early stage
company,  we  have  limited  experience  and  have  not  yet  demonstrated  an  ability  to  successfully  overcome  many  of  the  risks  and  uncertainties  frequently  encountered  by
companies in new and rapidly evolving fields, particularly in the biopharmaceutical area. Our future success is substantially dependent on our ability to successfully develop,
obtain regulatory approval for, and then commercialize such product candidates. Most of our product candidates are currently in early stage clinical trials. Our business depends
entirely  on  the  successful  development  and  commercialization  of  our  product  candidates,  which  may  never  occur.  We  currently  have  no  drug  products  for  sale,  currently
generate no revenues from sales of any drug products, and may never be able to develop or commercialize a marketable product.

17

 
 
 
 
 
 
 
 
 
 
 
 
 
 
The successful development, and any commercialization, of our technologies and any product candidates that may occur would require us to successfully perform a variety of
functions, including:

·

·

·

·

·

·

·

developing our technology platform;

identifying, developing, formulating, manufacturing and commercializing product candidates;

entering into successful licensing and other arrangements with product development partners;

participating in regulatory approval processes, including ultimately gaining approval to market a drug product, which may not occur;

obtaining sufficient quantities of our product candidates from our third-party manufacturers to meet clinical trial needs and, if approved, to meet commercial demand at
launch and thereafter;

establishing and maintaining agreements with wholesalers, distributors and group purchasing organizations on commercially reasonable terms;

conducting sales and marketing activities including hiring, training, deploying and supporting our sales force and creating market demand for our product candidates
through our own marketing and sales activities, and any other arrangements to promote our product candidates that we may establish; and

· maintaining patent protection and regulatory exclusivity for our product candidates.

Our operations have been limited to organizing our company, acquiring, developing and securing our proprietary technology and identifying and obtaining preclinical data or
clinical  data  for  various  product  candidates.  These  operations  provide  a  limited  basis  for  you  to  assess  our  ability  to  continue  to  develop  our  technology,  identify  product
candidates, develop and commercialize any product candidates we are able to identify and enter into successful collaborative arrangements with other companies, as well as for
you to assess the advisability of investing in our securities. Each of these requirements will require substantial time, effort and financial resources.

Each of our product candidates will require additional clinical development, management of clinical and manufacturing activities, regulatory approval in the jurisdictions in
which we plan to market the product, obtaining manufacturing supply, building a commercial organization, and significant marketing efforts before we generate any revenues
from product sales, which may not occur. We are not permitted to market or promote any of our product candidates in the U.S. or any other jurisdiction before we receive
regulatory  approval  from  the  FDA  or  comparable  foreign  regulatory  authority,  respectively,  and  we  may  never  receive  such  regulatory  approval  for  any  of  our  product
candidates.

Delays in the commencement or conduct of our clinical trials could result in increased costs and delay our ability to pursue regulatory approval.

The commencement or conduct of clinical trials can be delayed for a variety of reasons, including, but not necessarily limited to, delays in:

·

·

·

·

·

·

·

·

·

·

obtaining regulatory clearance/approval to commence a clinical trial;

identifying, recruiting and training suitable clinical investigators;

reaching and preserving agreements on acceptable terms with prospective clinical research organizations (“CROs”) and trial sites, the terms of which can be subject to
extensive negotiation, may be subject to modification from time to time and may vary significantly among different CROs and trial sites;

obtaining sufficient quantities of a product candidate for use in clinical trials;

obtaining Institutional Review Board (“IRB”) or ethics committee approval to conduct a clinical trial at a prospective site;

developing and validating companion diagnostics on a timely basis, if required;

adding new clinical sites once a trial has begun;

change in the principal investigator or other key staff overseeing the clinical trial at a given site;

identifying, recruiting and enrolling patients to participate in a clinical trial; or

retaining (or replacing) patients who have initiated a clinical trial but who may withdraw due to adverse events from the therapy, insufficient efficacy, fatigue with the
clinical trial process, personal issues, or other reasons.

Any delays in the commencement of our clinical trials will delay our ability to pursue regulatory approval for product candidates. In addition, many of the factors that cause, or
lead to, a delay in the commencement of clinical trials may also ultimately lead to the denial of regulatory approval of a product candidate.

Suspensions  or  delays  in  the  completion  of  clinical  testing  could  result  in  increased  costs  and  delay  or  prevent  our  ability  to  complete  development  of  that  product  or
generate product revenues.

Once a clinical trial has begun, patient recruitment and enrollment may be slower than we anticipate. Clinical trials may also be delayed as a result of ambiguous or negative
interim results or difficulties in obtaining sufficient quantities of product manufactured in accordance with regulatory requirements and on a timely basis. Further, a clinical trial
may be modified, suspended or terminated by us, an IRB, an ethics committee or a data safety monitoring committee overseeing the clinical trial, any clinical trial site with
respect to that site, or the FDA or other regulatory authorities, due to a number of factors, including, but not necessarily limited to:

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failure to conduct the clinical trial in accordance with regulatory requirements or our clinical protocols;

inspection of the clinical trial operations or clinical trial site by the FDA or other regulatory authorities resulting in the imposition of a clinical hold;

stopping rules contained in the protocol;

unforeseen safety issues or any determination that the clinical trial presents unacceptable health risks; and

lack of adequate funding to continue the clinical trial.

Changes in regulatory requirements and guidance also may occur, and we may need to amend clinical trial protocols to reflect these changes. Amendments may require us to
resubmit clinical trial protocols to IRBs for re-examination, which may in turn impact the costs and timing of, and the likelihood of successfully completing, a clinical trial. If we
experience delays in the completion of, or if we must suspend or terminate, any clinical trial of any product candidate, our ability to obtain regulatory approval for that product
candidate will be delayed, and the commercial prospects, if any, for the product candidate may suffer as a result. In addition, many of these factors may also ultimately lead to
the denial of regulatory approval of a product candidate.

Product candidates that we advance into clinical trials may not receive regulatory approval.

Pharmaceutical development has inherent risks. We will be required to demonstrate through well-controlled clinical trials that product candidates are effective with a favorable
benefit-risk  profile  for  use  in  their  target  indications  before  seeking  regulatory  approvals  for  their  commercial  sale.  Success  in  early  clinical  trials  does  not  mean  that  later
clinical trials will be successful, as product candidates in later-stage clinical trials may fail to demonstrate sufficient safety or efficacy despite having progressed through initial
clinical testing. Also, we may need to conduct additional clinical trials that are not currently anticipated. Companies frequently suffer significant setbacks in advanced clinical
trials, even after earlier clinical trials have shown promising results. As a result, product candidates that we advance into clinical trials may not receive regulatory approval.

In addition, even if our product candidates were to obtain approval, regulatory authorities may approve any such product candidates or any future product candidate for fewer or
more limited indications than we request, may not approve the price we intend to charge for our products, may grant approval contingent on the performance of costly post-
marketing clinical trials, or may approve a product candidate with a label that does not include the labeling claims necessary or desirable for the successful commercialization of
that product candidate. The regulatory authority may also require the label to contain warnings, contraindications, or precautions that limit the commercialization of the product.
In addition, the DEA (or foreign equivalent) may classify one or more of our product candidates in scheduling under the Controlled Substances Act (or its foreign equivalent)
that could impede such product’s commercial viability. Any of these scenarios could compromise the commercial prospects for one or more of our current or future product
candidates.

Any product candidates we advance into clinical development are subject to extensive regulation, which can be costly and time consuming, cause unanticipated delays or
prevent the receipt of the required approvals to commercialize product candidates.

The  clinical  development,  manufacturing,  labeling,  storage,  record-keeping,  advertising,  promotion,  import,  export,  marketing  and  distribution  of  any  product  candidate,
including our product candidates, is subject to extensive regulation by the FDA in the United States and by comparable health authorities  in  foreign  markets.  In  the  United
States, we are not permitted to market a product candidate until such product candidate’s Biologics License Application (“BLA”) or NDA is approved by the FDA. The process
of obtaining approval is expensive, often takes many years, and can vary substantially based upon the type, complexity and novelty of the products involved. In addition to
significant clinical testing requirements, our ability to obtain marketing approval for product candidates depends on obtaining the final results of required non-clinical testing,
including characterization of the manufactured components of our product candidates and validation of our manufacturing processes. The FDA may determine that our product
manufacturing processes, testing procedures or facilities are inadequate to justify approval. Approval policies or regulations may change, and the FDA has substantial discretion
in the pharmaceutical approval process, including the ability to delay, limit or deny approval of a product candidate for many reasons. Despite the time and expense invested in
the clinical development of product candidates, regulatory approval is never guaranteed.

The FDA and other regulatory agencies can delay, limit or deny approval of a product candidate for many reasons, including, but not limited to:

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the FDA or comparable foreign regulatory authorities may disagree with the design or implementation of our clinical trials;

our inability to demonstrate to the satisfaction of the FDA that a product candidate is safe and effective for an indication;

the FDA may not accept clinical data from trials conducted by individual investigators or in countries where the standard of care is potentially different from that of the
United States;

the results of clinical trials may not meet the level of statistical significance required by the FDA for approval;

the FDA may disagree with the interpretation of data from preclinical studies or clinical trials;

the FDA may not approve the manufacturing processes or facilities or those of third-party manufacturers with which we or our respective collaborators currently contract
for clinical supplies and plan to contract for commercial supplies; or

the approval policies or regulations of the FDA may significantly change in a manner rendering the clinical data insufficient for approval or the product characteristics or
benefit-risk profile unfavorable for approval.

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With respect to foreign markets, approval procedures vary among countries and, in addition to the aforementioned risks, can involve additional product testing, administrative
review periods and agreements with pricing authorities. In addition, recent events raising questions about the safety of certain marketed pharmaceuticals may result in increased
cautiousness by the FDA and comparable foreign regulatory authorities in reviewing new pharmaceuticals based on safety, efficacy or other regulatory considerations and may
result  in  significant  delays  in  obtaining  regulatory  approvals.  Any  delay  in  obtaining,  or  inability  to  obtain,  applicable  regulatory  approvals  would  prevent  us  from
commercializing our product candidates.

Any product candidate we advance into clinical trials may cause unacceptable adverse events or have other properties that may delay or prevent their regulatory approval
or commercialization or limit their commercial potential.

Unacceptable adverse events caused by any of our product candidates that we advance into clinical trials could cause regulatory authorities to interrupt, delay or stop clinical
trials and could result in the denial of regulatory approval by the FDA or other regulatory authorities for any or all targeted indications and markets. This, in turn, could prevent
us from commercializing the affected product candidate and generating revenues from its sale.

We have not completed testing for any of our product candidates for the indications for which we intend to seek product approval in humans, and we currently do not know the
extent of the adverse events, if any, that will be observed in patients who receive any of our product candidates. If any of our product candidates causes unacceptable adverse
events in clinical trials, we may not be able to obtain regulatory approval or commercialize such products, or, if such product candidates are approved for marketing, future
adverse events could cause us to withdraw such products from the market.

If any of our product candidates is approved and we or our contract manufacturer(s) fail to produce the product, or components of the product, in the volumes that we
require on a timely basis, or fail to comply with stringent regulations applicable to pharmaceutical drug manufacturers, we may face delays in the commercialization of our
product candidates or be unable to meet market demand, and may lose potential revenues.

The manufacture of pharmaceutical products requires significant expertise and capital investment, including the development of advanced manufacturing techniques and process
controls,  and  the  use  of  specialized  processing  equipment.  We  may  enter  into  development  and  supply  agreements  with  contract  manufacturers  for  the  completion  of  pre-
commercialization manufacturing development activities and, if approved, the manufacture of commercial supplies for one or more of our product candidates. Any termination
or disruption of our relationships with our contract manufacturers may materially harm our business and financial condition and frustrate any commercialization efforts for each
respective product candidate.

All  of  our  contract  manufacturers  must  comply  with  strictly  enforced  federal,  state  and  foreign  regulations,  including  current  good  manufacturing  practice  (“cGMP”)
requirements  enforced  by  the  FDA  through  its  establishment  inspection  program.  We  are  required  by  law  to  establish  adequate  oversight  and  control  over  raw  materials,
components and finished products furnished by our third-party suppliers and contract manufacturers, but we have little control over their compliance with these regulations. Any
failure to comply with applicable regulations may result in fines and civil penalties, suspension of production, restrictions on imports and exports, suspension or delay in product
approval,  product  seizure  or  recall,  or  withdrawal  of  product  approval,  and  would  limit  the  availability  of  our  product  and  customer  confidence  in  our  product.  Any
manufacturing defect or error discovered after products have been produced and distributed could result in even more significant consequences, including costly recalls, re-
stocking costs, damage to our reputation and potential for product liability claims.

If  the  contract  manufacturers  upon  whom  we  may  rely  to  manufacture  one  or  more  of  our  product  candidates,  and  any  future  product  candidate  we  may  in-license,  fails  to
deliver the required commercial quantities on a timely basis at commercially reasonable prices, we would likely be unable to meet demand for our products and we would lose
potential revenues.

We rely on third parties to conduct all aspects of our lentiviral vector production and these third parties may not perform satisfactorily.

We do not independently conduct our lentiviral vector production and we currently rely, and expect to continue to rely, on third parties with respect to the manufacture of these
items.

Our reliance on these third parties for manufacturing lentiviral vector reduces our control over these activities but will not relieve us of our responsibility to ensure compliance
with  all  required  regulations  and  study  protocols.  For  products  that  we  develop  and  commercialize,  we  will  remain  responsible  for  ensuring  that  each  of  our  IND-enabling
studies and clinical studies is conducted in accordance with the study plan and protocols, and that our lentiviral vectors are manufactured in accordance with GMP as applied in
the relevant jurisdictions.

If  these  third  parties  do  not  successfully  carry  out  their  contractual  duties,  meet  expected  deadlines,  conduct  our  studies  in  accordance  with  regulatory  requirements  or  our
stated  study  plans  and  protocols,  or  manufacture  our  lentiviral  vectors  in  accordance  with  GMP,  we  will  not  be  able  to  complete,  or  may  be  delayed  in  completing,  the
preclinical  and  clinical  studies  and  manufacturing  process  validation  activities  required  to  support  future  IND,  market  authorization  application  and  BLA  submissions  and
approval  of  our  product  candidates,  or  to  support  commercialization  of  our  products,  if  approved.  Many  of  our  agreements  with  these  third  parties  contain  termination
provisions that allow these third parties to terminate their relationships with us at any time.  If we need to enter into alternative arrangements, our product development and
commercialization activities could be delayed.

We may be forced to enter into an agreement with a different manufacturer, which we may not be able to do on reasonable terms, if at all. In some cases, the technical skills
required to manufacture lentiviral vector for our drug product candidates may be unique or proprietary to the original manufacturer, and we may have difficulty or there may be
contractual restrictions prohibiting us from, transferring such skills to a back-up or alternate supplier, or we may be unable to transfer such skills at all. Any of these events
could lead to clinical study delays or failure to obtain marketing approval or impact our ability to successfully commercialize our product or any future products. Some of these
events could be the basis for FDA action, including injunction, recall, seizure or total or partial suspension of production.

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Our approach to the development of our product candidates is unproven, and we do not know whether we will be able to develop any products of commercial value.

Our products candidates are emerging technologies and, consequently, it is conceivable that such technologies may ultimately fail to develop into commercially viable therapies
to  treat  human  patients  with  cancer  or  other  diseases.  One  of  the  reasons  for  the  lack  of  commercial  viability  could  be  our  inability  to  obtain  regulatory  approval  for  such
technologies.

If serious adverse or unacceptable side effects are identified during the development of one or more of our product candidates or any future product candidate, we may
need to abandon or limit our development of some of our product candidates.

If one or more of our product candidates or any future product candidate are associated with undesirable side effects or adverse events in clinical trials or have characteristics
that are unexpected, we may need to abandon their development or limit development to more narrow uses or subpopulations in which the adverse events, undesirable side
effects or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. In our industry, many compounds that initially showed promise
in early stage testing have later been found to cause serious adverse events that prevented further development of the compound. In the event that our clinical trials reveal a high
or unacceptable severity and prevalence of adverse events, our trials could be suspended or terminated, and the FDA or comparable foreign regulatory authorities could order us
to cease further development or deny approval of one or more of our product candidates or any future product candidate for any or all targeted indications. The FDA could also
issue a letter requesting additional data or information prior to making a final decision regarding whether or not to approve a product candidate. The number of requests for
additional data or information issued by the FDA in recent years has increased and has resulted in substantial delays in the approval of several new drugs. Adverse events or
undesirable side effects caused by one or more of our product candidates or any future product candidate could also result in the inclusion of unfavorable information in our
product  labeling  or  in  denial  of  regulatory  approval  by  the  FDA  or  other  regulatory  authorities  for  any  or  all  targeted  indications,  which  would,  in  turn,  prevent  us  from
commercializing and generating market acceptance and revenues from the sale of that product candidate. Adverse events or side effects could affect patient recruitment or the
ability of enrolled patients to complete the trial and could result in potential product liability claims.

Additionally,  if  one  or  more  of  our  product  candidates  or  any  future  product  candidate  receives  marketing  approval  and  we  or  others  later  identify  undesirable  side  effects
caused by this product, a number of potentially significant negative consequences could result, including:

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regulatory  authorities  may  require  the  addition  of  unfavorable  labeling  statements,  including  specific  warnings  ,  black  box  warnings,  adverse  reactions,  precautions,
and/or contraindications;

regulatory authorities may suspend or withdraw their approval of the product, and/or require it to be removed from the market;

we may be required to change the way the product is administered, conduct additional clinical trials or change the labeling of the product; or

our reputation may suffer.

Any of these events could prevent us from achieving or maintaining market acceptance of any of our product candidates or any future product candidate or could substantially
increase our commercialization costs and expenses, which in turn could delay or prevent us from generating significant revenues, or any revenues, from its sale.

Even if one or more of our product candidates receives regulatory approval, it and any other products we may market will remain subject to substantial regulatory scrutiny.

If one or more of our product candidates that we may license or acquire is approved, the approved product candidate will be subject to ongoing requirements and review by the
FDA and other regulatory authorities. These requirements include labeling, packaging, storage, advertising, promotion, record-keeping and submission of safety and other post-
market  information  and  reports,  registration  and  listing  requirements,  cGMP  requirements  relating  to  manufacturing,  quality  control,  quality  assurance  and  corresponding
maintenance  of  records  and  documents,  requirements  regarding  the  distribution  of  samples  to  physicians  and  recordkeeping  of  the  drug,  and  requirements  regarding  our
presentations to and interactions with health care professionals.

The FDA, or other regulatory authorities, may also impose requirements for costly post-marketing studies or clinical trials and surveillance to monitor the safety or efficacy of
the product. The FDA and other applicable regulatory authorities closely regulates the post-approval marketing and promotion of drugs to ensure drugs are marketed only for the
approved  indications  and  in  accordance  with  the  provisions  of  the  approved  labeling.  The  FDA  and  other  applicable  regulatory  authorities  impose  stringent  restrictions  on
manufacturers’ communications regarding off-label use and if we do not market our products for only their approved indications, we may be subject to enforcement action for
off-label marketing. Violations of the FDCA relating to the promotion of prescription drugs may lead to investigations, civil claims, and/or criminal charges alleging violations
of federal and state health care fraud and abuse laws, as well as state consumer protection laws.

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In addition, later discovery of previously unknown adverse events or other problems with our products, manufacturers or manufacturing processes, or failure to comply with
regulatory requirements, may yield various results, including:

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restrictions on such products, operations, manufacturers or manufacturing processes;

restrictions on the labeling or marketing of a product;

restrictions on product distribution or use;

requirements to conduct post-marketing studies or clinical trials;

warning letters, untitled letters, import alerts, and/or inspection observations;

withdrawal of the products from the market;

refusal to approve pending applications or supplements to approved applications that we submit;

recall of products;

fines, restitution or disgorgement of profits;

suspension or withdrawal of marketing or regulatory approvals;

suspension of any ongoing clinical trials;

refusal to permit the import or export of our products;

product seizure; or

Injunctions, consent decrees, and/or the imposition of civil or criminal penalties.

The FDA’s policies may change, and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates, or
negatively affect those products for which we may have already received regulatory approval, if any. 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 be subject to the various actions listed above, including losing any
marketing approval that we may have obtained.

We will need to obtain FDA approval of any proposed product brand names, and any failure or delay associated with such approval may adversely impact our business.

A pharmaceutical product cannot be marketed in the U.S. or other countries until we have completed a rigorous and extensive regulatory review process, including approval of a
brand  name. Any  brand  names  we  intend  to  use  for  our  product  candidates  will  require  approval  from  the  FDA  regardless  of  whether  we  have  secured  a  formal  trademark
registration from the USPTO. The FDA typically conducts a review of proposed product brand names, including an evaluation of the potential for confusion with other product
names. The FDA may also object to a product brand name if it believes the name inappropriately implies medical claims. If the FDA objects to any of our proposed product
brand  names,  we  may  be  required  to  adopt  an  alternative  brand  name  for  our  product  candidates.  If  we  adopt  an  alternative  brand  name,  we  would  lose  the  benefit  of  our
existing trademark applications for such product candidate and may be required to expend significant additional resources in an effort to identify a suitable product brand name
that would qualify under applicable trademark laws, not infringe the existing rights of third parties and be acceptable to the FDA. We may be unable to build a successful brand
identity for a new trademark in a timely manner or at all, which would limit our ability to commercialize our product candidates.

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Our current and future relationships with customers and third-party payors in the United States and elsewhere may be subject, directly or indirectly, to applicable anti-
kickback,  fraud  and  abuse,  false  claims,  transparency,  health  information  privacy  and  security  and  other  healthcare  laws  and  regulations,  which  could  expose  us  to
criminal sanctions, civil penalties, contractual damages, reputational harm, administrative burdens and diminished profits and future earnings.

Healthcare providers, physicians and third-party payors in the U.S. and elsewhere will play a primary role in the recommendation and prescription of any product candidates for
which we obtain marketing approval. Our future arrangements with third-party payors and customers may expose us to broadly applicable fraud and abuse and other healthcare
laws  and  regulations,  including,  without  limitation,  the  federal  Anti-Kickback  Statute  and  the  federal  False  Claims  Act,  which  may  constrain  the  business  or  financial
arrangements and relationships through which we sell, market and distribute any product candidates for which we obtain marketing approval. In addition, we may be subject to
transparency  laws  and  patient  privacy  regulation  by  the  federal  and  state  governments  and  by  governments  in  foreign  jurisdictions  in  which  we  conduct  our  business.  The
applicable federal, state and foreign healthcare laws and regulations that may affect our ability to operate include, but are not necessarily limited to:

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the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or providing remuneration,
directly or indirectly, in cash or in kind, to induce or reward, or in return for, 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 and state healthcare programs, such as Medicare and Medicaid;

federal civil and criminal false claims laws and civil monetary penalty laws, including the federal False Claims Act, which impose criminal and civil penalties, including
civil  whistleblower  or  qui  tam  actions,  against  individuals  or  entities  for  knowingly  presenting,  or  causing  to  be  presented,  to  the  federal  government,  including  the
Medicare and Medicaid programs, claims for payment that are false or fraudulent or making a false statement to avoid, decrease or conceal an obligation to pay money to
the federal government; the federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), which 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 of 2009 (“HITECH”), and their respective implementing regulations,
which impose obligations on covered healthcare providers, health plans, and healthcare clearinghouses, as well as their business associates that create, receive, maintain
or  transmit  individually  identifiable  health  information  for  or  on  behalf  of  a  covered  entity,  with  respect  to  safeguarding  the  privacy,  security  and  transmission  of
individually identifiable health information;

the federal Open Payments program, which requires manufacturers of certain approved 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 or other transfers of value” made to physicians, which is defined to include doctors, dentists, optometrists, podiatrists and
chiropractors, and teaching hospitals and applicable manufacturers and applicable group purchasing organizations to report annually to CMS ownership and investment
interests held by the physicians and their immediate family members. Data collection began on August 1, 2013, with requirements for manufacturers to submit reports to
CMS by March 31, 2014, and 90 days after the end each subsequent calendar year. Disclosure of such information was made by CMS on a publicly available website
beginning in September 2014 and is annually updated; and

analogous  state and foreign laws and regulations, such as state anti-kickback and false claims laws, which may apply to sales or marketing arrangements  and  claims
involving healthcare items or services reimbursed by non-governmental third-party payors, including private insurers; state and foreign 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; state and foreign 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 and foreign laws governing the privacy and security of
health  information  in  certain  circumstances,  many  of  which  differ from  each  other  in  significant  ways  and  often  are  not  preempted  by  HIPAA,  thus  complicating
compliance efforts.

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Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations may 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. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may
be subject to significant civil, criminal and administrative penalties, including, without limitation, damages, fines, imprisonment, exclusion from participation in government
healthcare programs, such as Medicare and Medicaid, and the curtailment or restructuring of our operations, which could have a material adverse effect on our business. If any
of the physicians or other healthcare providers or entities with whom we expect to do business, including our collaborators, is found not to be in compliance with applicable
laws, it may be subject to criminal, civil or administrative sanctions, including exclusions from participation in government healthcare programs, which could also materially
affect our business.

Regulatory approval by the FDA, or any similar regulatory authorities outside the United States, is limited to those specific indications and conditions for which clinical
safety and efficacy have been demonstrated.

Any regulatory approval is limited to those specific diseases and indications for which a product is deemed to be safe and effective by the FDA, or other similar regulatory
authorities  outside  the  United  States.  In  addition  to  the  regulatory  approval  required  for  new  drug  products,  new  formulations  or  indications  for  an  approved  product  also
require regulatory approval. If we are not able to obtain regulatory approval for any desired future indications for our products, our ability to effectively market and sell our
products may be reduced and our business may be adversely affected.

While physicians may choose to prescribe drugs for uses that are not described in the product’s labeling and for uses that differ from those tested in clinical studies and
approved by the regulatory authorities, our ability to promote the products is limited to those indications that are specifically approved by the FDA, or similar regulatory
authorities outside the United States. These “off-label” uses are common across medical specialties and may constitute an appropriate treatment for some patients in certain
circumstances. Regulatory authorities in the U.S. generally do not regulate the behavior of physicians in their choice of treatments. Regulatory authorities do, however, restrict
communications by pharmaceutical companies on the subject of off-label use. If our promotional activities fail to comply with these regulations or guidelines, we may be
subject to warnings from, or enforcement action by, these authorities. In addition, our failure to follow FDA rules and guidelines relating to promotion and advertising may
cause the FDA to suspend or withdraw an approved product from the market, require a recall or institute fines or penalties, or could result in disgorgement of money, operating
restrictions, corrective advertising, injunctions or criminal prosecution, any of which could harm our business.

We are subject to new legislation, regulatory proposals and managed care initiatives that may increase our costs of compliance and adversely affect our ability to market
our products, obtain collaborators and raise capital.

In the U.S. and some foreign jurisdictions, there have been a number of proposed and enacted legislative and regulatory changes regarding the healthcare system that could
prevent or delay marketing approval of one or more of our product candidates, restrict or regulate post-approval activities and affect our ability to profitably sell any of our
product candidates for which we obtain marketing approval.

Among  policy  makers  and  payors  in  the  U.S.  and  elsewhere,  there  is  significant  interest  in  promoting  changes  in  healthcare  systems  with  the  stated  goals  of  containing
healthcare costs, improving quality and expanding access. In the U.S., the pharmaceutical industry has been a particular focus of these efforts and has been significantly affected
by major legislative initiatives.

In March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation
Act, or collectively the ACA, a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of healthcare spending, enhance remedies against
fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose new taxes and fees on the health industry and impose additional
health policy reforms.

Among the provisions of the ACA of importance to our potential product candidates are:

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an  annual,  nondeductible fee  on  any  entity  that  manufactures,  or  imports  specified  branded  prescription  drugs  and  biologic  agents,  apportioned  among these  entities
according to their market share in certain government healthcare programs;

an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program to 23.1% and 13.0% of the average manufacturer price
for branded and generic drugs, respectively;

expansion of healthcare fraud and abuse laws, including the federal False Claims Act and the federal Anti-Kickback Statute, new government investigative  powers and
enhanced penalties for non-compliance;

a  new  Medicare  Part D  coverage  gap  discount  program,  in  which  manufacturers  must  agree  to  offer  point-of-sale  discounts  off  negotiated  prices of  applicable  brand
drugs to eligible beneficiaries during their coverage gap period, as a condition for a manufacturer’s outpatient drugs to be covered under Medicare Part D;

extension of a manufacturer’s Medicaid rebate liability to covered drugs dispensed to individuals who are enrolled in Medicaid managed care organizations;

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expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to additional individuals and by adding new
mandatory  eligibility  categories  for  certain  individuals  with  income  at  or  below  138%  of  the  federal  poverty level,  thereby  potentially  increasing  a  manufacturer’s
Medicaid rebate liability;

expansion  of  the  entities  eligible  to  enroll  in  the  340B  Drug  Pricing  Program  to  include  certain  critical  access  hospitals,  freestanding  cancer  hospitals,  rural  referral
centers, and sole community hospitals, but exempting certain drugs from the ceiling price requirements for these covered entities;

the new requirements under the federal Open Payments program and its implementing regulations;

a new requirement to annually report drug samples that manufacturers and distributors provide to physicians;

a  new  regulatory pathway for the approval of biosimilar biological products, all of which will impact existing government healthcare programs and will result in the
development of new programs; and

a  new  Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with  funding  for
such research.

The Supreme Court upheld the ACA in the main challenge to the constitutionality of the law in 2012. Specifically, the Supreme Court held that the individual mandate and
corresponding penalty was constitutional because it would be considered a tax by the federal government. The Supreme Court also upheld federal subsidies for purchasers of
insurance through federally facilitated exchanges in a decision released in June 2015.

President Trump ran for office on a platform that supported the repeal of the ACA, and one of his first actions after his inauguration was to sign an Executive Order instructing
federal agencies to waive or delay requirements of the ACA that impose economic or regulatory burdens on states, families, the health-care industry and others. Modifications to
or repeal of all or certain provisions of the ACA have been attempted in Congress as a result of the outcome of the recent presidential and congressional elections, consistent
with statements made by the incoming administration and members of Congress during the presidential and congressional campaigns and following the election.

In January 2017, Congress voted to adopt a budget resolution for fiscal year 2017, or the Budget Resolution, that authorizes the implementation of legislation that would repeal
portions of the ACA. The Budget Resolution is not a law. However, it is widely viewed as the first step toward the passage of legislation that would repeal certain aspects of the
ACA. In March 2017, following the passage of the budget resolution for fiscal year 2017, the U.S. House of Representatives passed legislation known as the American Health
Care Act of 2017, which, if enacted, would amend or repeal significant portions of the ACA. Attempts in the Senate to pass ACA repeal legislation, including the Better Care
Reconciliation Act of 2017, so far have been unsuccessful. At the end of 2017, Congress passed the Tax Cuts and Jobs Act, which repealed the penalty for individuals who fail
to  maintain  minimum  essential  health  coverage  as  required  by  the  ACA.  Following  this  legislation,  Texas  and  19  other  states  filed  a  lawsuit  alleging  that  the  ACA  is
unconstitutional as the individual mandate was repealed, undermining the legal basis for the Supreme Court’s prior decision. On December 14, 2018, Texas federal district court
judge  Reed  O’Connor  issued  a  ruling  declaring  that  the ACA  in  it  is  entirety  is  unconstitutional.  While  this  decision  has  no  immediate  legal  effect  on  the ACA  and  its
provisions, this lawsuit is ongoing and the outcome through the appeals process may have a significant impact on our business.

The Trump Administration has also taken several regulatory steps to redirect ACA implementation. The Department of Health and Human Services (“HHS”) finalized Medicare
fee-for-service hospital payment reductions for Part B drugs acquired through the 340B Drug Pricing Program, which has been overturned by the courts. HHS also has signaled
its intent to pursue reimbursement policy changes for Medicare Part B drugs as a whole that likely would reduce hospital and physician reimbursement for these drugs.

HHS has made numerous other proposals aimed at lowering drug prices for Medicare beneficiaries and increasing price transparency. These proposals include giving Medicare
Advantage and Part D plans flexibility in the availability of drugs in “protected classes,” more transparency in the cost of drugs, including the beneficiary’s financial liability,
and less costly alternatives and permitting the use of step therapy as a means of prior authorization. HHS has also proposed requiring pharmaceutical manufacturers disclose the
prices of certain drugs in direct-to-consumer television advertisements. The proposal related to protected classes has been withdrawn and the disclosure requirements have been
rejected by the courts. In addition, a proposed rule that would have passed drug rebates to consumers at the point of sale also has been withdrawn. However, it appears the
Trump Administration will continue to explore its authority to make regulatory changes to the pharmaceutical industry. For example, the Trump Administration released an
Advance  Notice  of  Proposed  Rulemaking  related  to  an  international  price  index  model.  It  is  unclear  what  eventually  will  be  proposed,  but  the  President  has  alluded  to  the
concept of “most favored nation” pricing with regards to U.S. drug purchasing. In addition, HHS, in conjunction with the FDA, released two pharmaceutical importation models
in  December  2019:  (1)  a  Notice  of  Proposed  Rulemaking  to  permit  importation  of  pharmaceuticals  from  Canada,  and  (2)  draft  FDA  guidance  permitting  manufacturers  to
import their own pharmaceuticals that were originally intended for marketing in other countries.

25

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
HHS also has taken steps to increase the availability of cheaper health insurance options, typically with fewer benefits and less generous coverage. The Administration has also
signaled  its  intention  to  address  drug  prices  and  to  increase  competition,  including  by  increasing  the  availability  of  biosimilars  and  generic  drugs. As  these  are  regulatory
actions, a new administration could undo or modify these efforts.

We  expect  that  the ACA,  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 drug. Any reduction in reimbursement from Medicare or other government healthcare programs may result in
a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate
revenue, attain profitability or commercialize our drugs.

Legislative proposals such as expanding the Medicaid drug rebate program to the Medicare Part D program, providing authority for the government to negotiate drug prices
under the Medicare Part D program and lowering reimbursement for drugs covered under the Medicare Part B program have been raised in Congress, but have been met with
opposition and have not been enacted so far.

The administration can rely on its existing statutory authority to make policy changes that could have an impact on the drug industry.  For example, the Medicare program has in
the past proposed to test alternative payment methodologies for drugs covered under the Part B program and currently is proposing to pay hospitals less for Part B-covered drugs
purchased through the 340B Drug Pricing Program.

Legislative and regulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for drugs. We cannot be sure whether
additional legislative changes will be enacted, or whether the FDA regulations, guidance or interpretations will be changed, or what the impact of such changes on the marketing
approvals of our product candidates, if any, may be. In addition, increased scrutiny by the U.S. Congress of the FDA’s approval process may significantly delay or prevent
marketing approval, as well as subject us to more stringent product labeling and post-marketing testing and other requirements.

We  cannot  predict  the  likelihood,  nature  or  extent  of  government  regulation  that  may  arise  from  future  legislation  or  administrative  or  executive  action,  either  in  the
United States or abroad.

We cannot predict the likelihood, nature or extent of how government regulation that may arise from future legislation or administrative or executive action taken by the U.S.
presidential  administration  may  impact  our  business  and  industry.  In  particular,  the  U.S.  President  has  taken  several  executive  actions,  specifically  through  rulemaking  and
guidance, that could impact the pharmaceutical business and industry. A few of the major administrative actions include:

·

·

·

·

·

·

On October 9, 2019, CMS issued a proposed rule entitled, Modernizing and Clarifying the Physician Self-Referral Regulations and on the same day the HHS Office of
Inspector General issued a similar rule, entitled Revisions to Safe Harbors Under the Anti-Kickback Statute, and Civil Monetary penalty Rules Regarding Beneficiary
Inducements.  The  proposed  rules  are  an  effort  to  reform  regulations  dealing  with  anti-kickback  and  self-referral  laws.  The  proposals  are  attempting  to  allow  certain
financial arrangements that would otherwise violate anti-kickback and self-referral laws for providers that are participating in value-based payment arrangements. The
proposed rule could impact drug purchasing behavior to ensure providers are within their budget and/or restructure existing payment structures between providers and
manufacturers.

On October 30, 2019, the Administration issued an advanced notice of proposed rulemaking (“ANPRM”) entitled, International Pricing Index Model for Medicare Part
B Drugs. This ANPRM is soliciting feedback on a potential proposal to align United States drug prices in the Medicare Part B program with international prices. It also
solicits  public  feedback  on  a  policy  that  would  allowing  private-sector  vendors  to  negotiate  prices,  take  title  to  drugs,  and  improve  competition  for  hospital  and
physician  business. Although  this  is  only  a  notice  for  a  potential  rule,  it  signals  the Administration’s  desire  to  regulatorily  influence  the  United  States  drug  pricing
system that could adversely affect the industry.

On November 15, 2019, CMS issued a proposed rule entitled, Transparency in Coverage and finalized the Calendar Year (“CY”) 2020 Outpatient Prospective Payment
System (“OPPS”) & Ambulatory Surgical Center Price Transparency Requirements for Hospitals to Make Standard Charges Rule. Together the rules would increase
price  transparency  through  health  plans  and  in  hospitals.  The  affects  may  influence  consumer  purchasing  habits  in  the  health  care  sector  as  a  whole. Although  the
transparency provisions are not yet in effect and the hospital price transparency requirements are subject to litigation, there could be implications for the industry related
to drug pricing if or when it is enacted.

On  November  18,  2019,  CMS  issued  a  proposed  rule  entitled, Medicaid  Fiscal  Accountability  Regulation  (“MFAR”).  The  proposed  rule  would  significantly  impact
states’ ability to finance their Medicaid programs. If finalized, the MFAR could force states to restructure their Medicaid financing that could disincentivize or change
state prescription drug purchasing behavior that would adversely impact the industry.

On  December  18,  2019,  the  FDA  issued  a  proposed  rule  entitled, Importation  of  Prescription  Drugs.  The  proposed  rule  would  allow  the  importation  of  certain
prescription drugs from Canada. If finalized, states or other non-federal government entities would be able to submit importation program proposals to FDA for review
and authorization. This proposed rule could also influence pricing practices in the United States.

On January 30, 2020, CMS issued a state waiver option entitled, Health Adult Opportunity (“HAO”). The HAO would allow states to restructure benefits and coverage
policies for their Medicaid programs. The HAO will provide states administrative flexibilities in exchange for a capped federal share. The cap on the federal share is
commonly referred to as a “block grant.” Importantly, the HAO allows states to set formularies that align with Essential Health Benefit requirements while still requiring
manufacturers to participate in the Medicaid Rebate Program. Depending on utilization of the HAO by states, it could impact the industry – especially if states elect to
use a formulary.

26

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
It  is  also  possible  that  the  Trump Administration  will  include  drug  pricing  proposals  in  annual  rulemaking  throughout  the  year. As  noted  above,  it  is  impossible  to  predict
whether these policies will be included in future rulemaking; however, it is possible and worth noting.

Changes in funding for the FDA and other government agencies could hinder their ability to hire and retain key leadership and other personnel, or otherwise prevent new
products and services from being developed or commercialized in a timely manner, which could negatively impact our business or the business of our partners.

The ability of the FDA to review and approve new products can be affected by a variety of factors, including government budget and funding levels, ability to hire and retain
key personnel, ability to accept the payment of user fees, and statutory, regulatory, and policy changes. Average review times at the agency have fluctuated in recent years as a
result. In addition, government funding of other government agencies that fund research and development activities is subject to the political process, which is inherently fluid
and unpredictable.

Disruptions at the FDA and other agencies may also slow the time necessary for new drugs to be reviewed and/or approved by necessary government agencies, which would
adversely  affect  our  business  or  the  business  of  our  partners.  For  example,  over  the  last  several  years,  including  for  35  days  beginning  on  December  22,  2018,  the  U.S.
government has shut down several times and certain regulatory agencies, such as the FDA, have had to furlough nonessential FDA employees and stop routine activities. If a
prolonged  government  shutdown  occurs,  it  could  significantly  impact  the  ability  of  the  FDA  to  timely  review  and  process  our  regulatory  submissions,  which  could  have  a
material adverse effect on our business. If the timing of FDA’s review and approval of new products is delayed, the timing of our or our partners’ development process may be
delayed, which could result in delayed milestone revenues and materially harm our operations or business.

Public concern regarding the safety of drug products could delay or limit our ability to obtain regulatory approval, result in the inclusion of unfavorable information in our
labeling, or require us to undertake other activities that may entail additional costs.

In light of widely publicized events concerning the safety risk of certain drug products, the FDA, members of the U.S. Congress, the Government Accountability Office, medical
professionals and the general public have raised concerns about potential drug safety issues. These events have resulted in the withdrawal of drug products, revisions to drug
labeling  that  further  limit  use  of  the  drug  products  and  the  establishment  of  risk  management  programs.  The  Food  and  Drug Administration Amendments Act  of  2007,  or
FDAAA, grants significant expanded authority to the FDA, much of which is aimed at improving the safety of drug products before and after approval. In particular, the new
law authorizes the FDA to, among other things, require post-approval studies and clinical trials, mandate changes to drug labeling to reflect new safety information and require
risk evaluation and mitigation strategies for certain drugs, including certain currently approved drugs. It also significantly expands the federal government’s clinical trial registry
and results databank, which we expect will result in significantly increased government oversight of clinical trials. Under the FDAAA, companies that violate these and other
provisions of the new law are subject to substantial civil monetary penalties, among other regulatory, civil and criminal penalties. The increased attention to drug safety issues
may result in a more cautious approach by the FDA in its review of data from our clinical trials. Data from clinical trials may receive greater scrutiny, particularly with respect
to  safety,  which  may  make  the  FDA  or  other  regulatory  authorities  more  likely  to  require  additional  preclinical  studies  or  clinical  trials.  If  the  FDA  requires  us  to  conduct
additional preclinical studies or clinical trials prior to approving any of our product candidates, our ability to obtain approval of this product candidate will be delayed. If the
FDA requires us to provide additional clinical or preclinical data following the approval of any of our product candidates, the indications for which this product candidate is
approved  may  be  limited  or  there  may  be  specific  warnings  or  limitations  on  dosing,  and  our  efforts  to  commercialize  our  product  candidates  may  be  otherwise  adversely
impacted.

If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory approvals could be delayed or prevented.

We may not be able to initiate or continue clinical trials for one or more of our product candidates if we are unable to locate and enroll a sufficient number of eligible patients to
participate in these trials as required by the FDA or similar regulatory authorities outside the United States. Some of our competitors have ongoing clinical trials for product
candidates that treat the same indications that we are targeting for our product candidates, and patients who would otherwise be eligible for our clinical trials may instead enroll
in clinical trials of our competitors’ product candidates. Available therapies for the indications we are pursuing can also affect enrollment in our clinical trials. Patient enrollment
is affected by other factors including, but not necessarily limited to:

·

·

·

the severity of the disease under investigation;

the eligibility criteria for the study in question;

the perceived risks and benefits of the product candidate under study;

27

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
·

·

·

·

·

the efforts to facilitate timely enrollment in clinical trials;

the patient referral practices of physicians;

the number of clinical trials sponsored by other companies for the same patient population;

the ability to monitor patients adequately during and after treatment; and

the proximity and availability of clinical trial sites for prospective patients.

Our  inability  to  enroll  a  sufficient  number  of  patients  for  our  clinical  trials  would  result  in  significant  delays  and  could  require  us  to  abandon  one  or  more  clinical  trials
altogether. Enrollment delays in our clinical trials may result in increased development costs for our product candidates or future product candidates, which would cause the
value of our company to decline and limit our ability to obtain additional financing.

Our  product  candidates  are  in  scientific  areas  of  intense  competition  from  many  large  pharmaceutical  and  biotechnology  companies,  many  of  which  are  significantly
further along in development or are already on the market with competing products. We expect competition for our product candidates will intensify, and new products may
emerge that provide different or better therapeutic alternatives for our targeted indications.

The biotechnology and pharmaceutical industries are subject to rapid and intense technological change. We face, and will continue to face, competition in the development and,
if  approved,  marketing  of  our  product  candidates  from  academic  institutions,  government  agencies,  research  institutions  and  biotechnology  and  pharmaceutical  companies.
There can be no assurance that developments by others will not render one or more of our product candidates obsolete or noncompetitive. Furthermore, new developments,
including  the  development  of  other  drug  technologies  and  methods  of  preventing  the  incidence  of  disease,  occur  in  the  pharmaceutical  industry  at  a  rapid  pace.  These
developments may render one or more of our product candidates obsolete or noncompetitive.

Competitors may seek  to  develop  alternative  formulations  that  do  not  directly  infringe  on  our  in-licensed  patent  rights.  The  commercial  opportunity  for  one  or  more  of  our
product candidates could be significantly harmed if competitors are able to develop alternative formulations outside the scope of our in-licensed patents. Compared to us, many
of our potential competitors have substantially greater:

·

·

·

·

·

capital resources;

development resources, including personnel and technology;

clinical trial experience;

regulatory experience;

expertise in prosecution of intellectual property rights; and

· manufacturing, distribution and sales and marketing experience.

As  a  result  of  these  factors,  our  competitors  may  obtain  regulatory  approval  of  their  products  more  rapidly  than  we  are  able  to  or  may  obtain  patent  protection  or  other
intellectual property rights that limit our ability to develop or commercialize one or more of our product candidates. Our competitors may also develop drugs that are more
effective, safe, useful and less costly than ours and may be more successful than us in manufacturing and marketing their products.

28

 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Our commercial success depends upon us attaining significant market acceptance of our product candidates, if approved for sale, among physicians, patients, healthcare
payors and major operators of cancer and other clinics.

Even if we obtain regulatory approval for one or more of our product candidates, the product may not gain market acceptance among physicians, health care payors, patients
and the medical  community,  which  are  critical  to  commercial  success.  Market  acceptance  of  any  product  candidate  for  which  we  receive  approval  depends  on  a  number  of
factors, including, but not necessarily limited to:

·

·

·

·

·

·

·

·

·

·

·

·

·

the efficacy and safety as demonstrated in clinical trials;

the timing of market introduction of such product candidate as well as competitive products;

the clinical indications for which the drug is approved;

acceptance by physicians, major operators of cancer clinics and patients of the drug as a safe and effective treatment;

the safety of such product candidates seen in a broader patient group, (i.e., based on actual use);

the availability, cost and potential advantages of alternative treatments, including less expensive generic drugs;

the availability of adequate reimbursement and pricing by third-party payors and government authorities;

changes in regulatory requirements by government authorities for our product candidates;

the relative convenience and ease of administration of the product candidate for clinical practices;

the product labeling or product insert required by the FDA or regulatory authority in other countries;

the approval, availability, market acceptance and reimbursement for a companion diagnostic, if any;

the prevalence and severity of adverse side effects; and

the effectiveness of our sales and marketing efforts.

If any product candidate that we develop does not provide a treatment regimen that is as beneficial as, or is not perceived as being as beneficial as, the current standard of care or
otherwise does not provide patient benefit, that product candidate, if approved for commercial sale by the FDA or other regulatory authorities, likely will not achieve market
acceptance. Our ability to effectively promote and sell any approved products will also depend on pricing and cost-effectiveness, including our ability to produce a product at a
competitive price and our ability to obtain sufficient third-party coverage or reimbursement. If any product candidate is approved but does not achieve an adequate level of
acceptance by physicians, patients and third-party payors, our ability to generate revenues from that product would be substantially reduced. In addition, our efforts to educate
the medical community and third-party payors on the benefits of our product candidates may require significant resources, may be constrained by FDA rules and policies on
product promotion, and may never be successful.

If approved, our product candidates will face competition from less expensive generic products of competitors, and, if we are unable to differentiate the benefits of our
product candidates over these less expensive alternatives, we may never generate meaningful product revenues.

Generic therapies are typically sold at lower prices than branded therapies and are generally preferred by hospital formularies and managed care providers of health services. We
anticipate that, if approved, our product candidates will face increasing competition in the form of generic versions of branded products of competitors, including those that
have lost or will lose their patent exclusivity. In the future, we may face additional competition from a generic form when the patents covering them begin to expire, or earlier if
the  patents  are  successfully  challenged.  If  we  are  unable  to  demonstrate  to  physicians  and  payers  that  the  key  differentiating  features  of  our  product  candidates  translate  to
overall clinical benefit or lower cost of care, we may not be able to compete with generic alternatives.

29

 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Reimbursement may be limited or unavailable in certain market segments for our product candidates, which could make it difficult for us to sell our products profitably.

There is significant uncertainty related to the third-party coverage and reimbursement of newly approved drugs. Such third-party payors include government health programs
such as Medicare, managed care providers, private health insurers and other organizations. We intend to seek approval to market our product candidates in the U.S., the EU and
other  selected  foreign  jurisdictions.  Market  acceptance  and  sales  of  our  product  candidates  in  both  domestic  and  international  markets  will  depend  significantly  on  the
availability of adequate coverage and reimbursement from third-party payors for any of our product candidates and may be affected by existing and future health care reform
measures. Government and other third-party payors are increasingly attempting to contain healthcare costs by limiting both coverage and the level of reimbursement for new
drugs and, as a result, they may not cover or provide adequate payment for our product candidates. These payors may conclude that our product candidates are less safe, less
effective or less cost-effective than existing or future introduced products, and third-party payors may not approve our product candidates for coverage and reimbursement or
may cease providing coverage and reimbursement for these product candidates.

Obtaining coverage and reimbursement approval for a product from a government or other third-party payor is a time consuming and costly process that could require us to
provide to the payor supporting scientific, clinical and cost-effectiveness data for the use of our products. We may not be able to provide data sufficient to gain acceptance with
respect to coverage and reimbursement. If reimbursement of our future products is unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, we may
be unable to achieve or sustain profitability.

In some foreign countries, particularly in the EU, the pricing of prescription pharmaceuticals is subject to governmental control. In these countries, pricing negotiations with
governmental  authorities  can  take  considerable  time  after  the  receipt  of  marketing  approval  for  a  product  candidate.  To  obtain  reimbursement  or  pricing  approval  in  some
countries, we may be required to conduct additional clinical trials that compare the cost-effectiveness of our product candidates to other available therapies. If reimbursement of
our product candidates is unavailable or limited in scope or amount in a particular country, or if pricing is set at unsatisfactory levels, we may be unable to achieve or sustain
profitability of our products in such country.

If we are unable to establish sales, marketing and distribution capabilities or to enter into agreements with third parties to market and sell our product candidates, we may
not be successful in commercializing our product candidates if and when they are approved.

We  currently  do  not  have  a  marketing  or  sales  organization  for  the  marketing,  sales  and  distribution  of  pharmaceutical  products.  In  order  to  commercialize  any  product
candidate that receives marketing approval, we would need to build marketing, sales, distribution, managerial and other non-technical capabilities or make arrangements with
third parties to perform these services, and we may not be successful in doing so. In the event of successful development and regulatory approval of one or more of our product
candidates or any future product candidate, we expect to build a targeted specialist sales force to market or co-promote the product. There are risks involved with establishing
our own sales, marketing and distribution capabilities. For example, recruiting and training a sales force is expensive and time consuming and could delay any product launch. If
the commercial launch of a product candidate for which we recruit a sales force and establish marketing capabilities is delayed or does not occur for any reason, we would have
prematurely or unnecessarily incurred these commercialization expenses. This may be costly, and our investment would be lost if we cannot retain or reposition our sales and
marketing personnel.        

Factors that may inhibit our efforts to commercialize our products on our own include, but are not necessarily limited to:

·

·

·

·

our inability to recruit, train and retain adequate numbers of effective sales and marketing personnel;

the inability of sales personnel to obtain access to physicians or persuade adequate numbers of physicians to prescribe any future products;

the lack of complementary or other products to be offered by sales personnel, which may put us at a competitive disadvantage from the perspective of sales efficiency
relative to companies with more extensive product lines; and

unforeseen costs and expenses associated with creating our own sales and marketing organization.

As an alternative to establishing our own sales force, we may choose to partner with third parties that have well-established direct sales forces to sell, market and distribute our
products.

We rely, and expect to continue to rely, on third parties to conduct our preclinical studies and clinical trials, and those third parties may not perform satisfactorily, including
failing to meet deadlines for the completion of such trials or complying with applicable regulatory requirements.

We rely on our licensors to conduct some of our preclinical studies and some of our clinical trials for our product candidates and for future product candidates, and we rely on
third-party contract research organizations and site management organizations to conduct most of the remainder of our preclinical studies and all the rest of our clinical trials.
We expect to continue to rely on third parties, such as our licensors, contract research organizations, site management organizations, clinical data management organizations,
medical institutions and clinical investigators, to conduct some of our preclinical studies and all of our clinical trials. The agreements with these third parties might terminate for
a variety of reasons, including a failure to perform by the third parties. If we need to enter into alternative arrangements, that could delay our product development activities.

30

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Our reliance on these third parties for research and development activities reduces our control over these activities but does not relieve us of our responsibilities. For example,
we remain responsible for ensuring that each of our preclinical studies and clinical trials are conducted in accordance with the general investigational plan and protocols for the
trial and for ensuring that our preclinical studies are conducted in accordance with good laboratory practices (“GLPs”) as appropriate. Moreover, the FDA requires us to comply
with standards, commonly referred to as good clinical practices (“GCPs”) for conducting, recording and reporting the results of clinical trials to assure that data and reported
results are credible and accurate and that the rights, integrity and confidentiality of trial participants are protected. Regulatory authorities enforce these requirements through
periodic inspections of trial sponsors, clinical investigators and trial sites. If we or any of our CROs fail to comply with applicable GCPs, the clinical data generated in our
clinical trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our
marketing applications. We cannot assure you that upon inspection by a regulatory authority, such regulatory authority will determine that any of our clinical trials complies
with  GCP  regulations.  In  addition,  our  clinical  trials  must  be  conducted  with  product  produced  under  cGMP  regulations.  Our  failure  to  comply  with  these  regulations  may
require us to repeat clinical trials, which would delay the regulatory approval process. We also are required to register ongoing clinical trials and post the results of completed
clinical trials on a government-sponsored database, ClinicalTrials.gov, within specified timeframes. Failure to do so can result in fines, adverse publicity and civil and criminal
sanctions.

The third parties with whom we have contracted to help perform our preclinical studies and/or clinical trials may also have relationships with other entities, some of which may
be our competitors. If these third parties do not successfully carry out their contractual duties, meet expected deadlines or conduct our preclinical studies or clinical trials in
accordance with regulatory requirements or our stated protocols, we will not be able to obtain, or may be delayed in obtaining, marketing approvals for our product candidates
and will not be able to, or may be delayed in our efforts to, successfully commercialize our product candidates.

If any of our relationships with these third-party contract research organizations or site management organizations terminates, we may not be able to enter into arrangements
with  alternative  contract  research  organizations  or  site  management  organizations  or  to  do  so  on  commercially  reasonable  terms.  Switching  or  adding  additional  contract
research organizations or site management organizations involves additional cost and requires management time and focus. In addition, there is a natural transition period when
a  new  contract  research  organization  or  site  management  organization  commences  work. As  a  result,  delays  could  occur,  which  could  compromise  our  ability  to  meet  our
desired  development  timelines.  Though  we  carefully  manage  our  relationships  with  our  contract  research  organizations  or  site  management  organizations,  there  can  be  no
assurance that we will not encounter similar challenges or delays in the future. Forces beyond our control could disrupt the ability of our third-party CROs, site management
organizations, clinical data management organizations, medical institutions, and clinical investigators to conduct our preclinical studies and our clinical trials for our product
candidates and for any future product candidate. For instance, the developing situation in China and globally regarding the coronavirus disease outbreak has the potential to
adversely impact our product development activities. At this time, the impact of the coronavirus disease outbreak is not having a material adverse effect on our business, but no
assurance can be given it will not in the future if the situation persists.

We contract with third parties for the manufacture of our product candidates for preclinical and clinical testing and may also do so for commercialization, if and when our
product candidates are approved. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or any future product
candidate or such quantities at an acceptable cost, which could delay, prevent or impair our development or commercialization efforts.

We may rely on third-party manufacturers or third-party collaborators for the manufacture of commercial supply of one or more product candidates for which our collaborators
or we obtain marketing approval. We may be unable to establish any agreements with third-party manufacturers or to do so on acceptable terms. Even if we are able to establish
agreements with third-party manufacturers, reliance on third-party manufacturers entails additional risks, including, but not necessarily limited to:

·

·

reliance on the third party for regulatory compliance and quality assurance, while still being required by law to establish adequate oversight and control over products
furnished by that third party;

the possible breach of the manufacturing agreement by the third party;

· manufacturing delays if our third-party manufacturers are unable to obtain raw materials due to supply chain disruptions, give greater priority to the supply of other

products over our product candidates or otherwise do not satisfactorily perform according to the terms of the agreement between us;

·

·

the possible misappropriation of our proprietary information, including our trade secrets and know-how; and

the possible termination or nonrenewal of the agreement by the third party at a time that is costly or inconvenient for us.

31

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
We rely on our third-party manufacturers to produce or purchase from third-party suppliers the materials and equipment necessary to produce our product candidates for our
preclinical and clinical trials. There are a limited number of suppliers for raw materials and equipment that we use (or that are used on our behalf) to manufacture our drugs, and
there may be a need to assess alternate suppliers to prevent a possible disruption of the manufacture of the materials and equipment necessary to produce our product candidates
for our preclinical and clinical trials, and if approved, ultimately for commercial sale. We do not have any control over the process or timing of the acquisition of these raw
materials or equipment by our third-party manufacturers. Any significant delay in the supply of a product candidate, or the raw material components thereof, for an ongoing
preclinical or clinical trial due to the need to replace a third-party manufacturer could considerably delay completion of our preclinical or clinical trials, product testing and
potential regulatory approval of our product candidates. If our manufacturers or we are unable to purchase these raw materials or equipment after regulatory approval has been
obtained for our product candidates, the commercial launch of our product candidates would be delayed or there would be a shortage in supply, which would impair our ability
to generate revenues from the sale of our product candidates.

The facilities used by contract manufacturers to potentially manufacture our product candidates must be approved by the FDA pursuant to inspections that will be conducted
after  we  submit  an  NDA  or  BLA  to  the  FDA.  We  are  required  by  law  to  establish  adequate  oversight  and  control  over  raw  materials,  components  and  finished  products
furnished by our contract manufacturers, but we do not control the day-to-day manufacturing operations of, and are dependent on, the contract manufacturers for compliance
with  cGMP  regulations  for  manufacture  of  our  product  candidates.  Third-party  manufacturers  may  not  be  able  to  comply  with  the  cGMP  regulations  or  similar  regulatory
requirements  outside  the  United  States.  Our  failure,  or  the  failure  of  our  third-party  manufacturers,  to  comply  with  applicable  regulations  could  result  in  sanctions  being
imposed on us, including clinical holds, fines, injunctions, restrictions on imports and exports, civil penalties, delays, suspension or withdrawal of approvals, license revocation,
seizures  or  recalls  of  product  candidates  or  products,  operating  restrictions  and  criminal  prosecutions,  any  of  which  could  significantly  and  adversely  affect  supplies  of  our
products.

One or more of the product candidates that we may develop may compete with other product candidates and products for access to manufacturing facilities. There are a limited
number of manufacturers that operate under cGMP regulations and that might be capable of manufacturing for us. Any performance failure on the part of our existing or future
manufacturers  could  delay  clinical  development  or  marketing  approval.  We  do  not  currently  have  arrangements  in  place  for  redundant  supply.  If  our  current  contract
manufacturers  cannot  perform  as  agreed,  we  may  be  required  to  replace  such  manufacturers.  We  may  incur  added  costs  and  delays  in  identifying  and  qualifying  any
replacement manufacturers. The DEA restricts the importation of a controlled substance finished drug product when the same substance is commercially available in the United
States, which could reduce the number of potential alternative manufacturers for one or more of our product candidates. 

Future dependence upon others for the manufacture of our product candidates or products may adversely affect our future profit margins and our ability to commercialize any
products that may receive marketing approval on a timely and competitive basis.

We  also  expect  to  rely  on  other  third  parties  to  distribute  drug  supplies  for  our  clinical  trials. Any  performance  failure  on  the  part  of  our  distributors  could  delay  clinical
development  or  marketing  approval  of  our  product  candidates  or  commercialization  of  our  products,  if  approved,  producing  additional  losses  and  depriving  us  of  potential
product revenue.

We rely on clinical data and results obtained by third parties that could ultimately prove to be inaccurate or unreliable.

As  part  of  our  strategy  to  mitigate  development  risk,  we  seek  to  develop  product  candidates  with  well-studied  mechanisms  of  action,  and  we  utilize  biomarkers  to  assess
potential clinical efficacy early in the development process. This strategy necessarily relies upon clinical data and other results obtained by third parties that may ultimately
prove to be inaccurate or unreliable. Further, such clinical data and results may be based on products or product candidates that are significantly different from our product
candidates or any future product candidate. If the third-party data and results we rely upon prove to be inaccurate, unreliable or not applicable to our product candidates or future
product candidate, we could make inaccurate assumptions and conclusions about our product candidates and our research and development efforts could be compromised.

If we breach any of the agreements under which we license rights to one or more of product candidates from others, we could lose the ability to continue to develop and, if
approved, commercialize such product candidate.

Because we have in-licensed the rights to all of our product candidates from COH, Fred Hutch, St. Jude and Nationwide, and in the future will continue to in-license from
additional third parties, if there is any dispute between us and our licensor regarding our rights under our license agreement, our ability to develop and commercialize these
product candidates may be adversely affected. Any uncured, material breach under our license agreement could result in our loss of exclusive rights to our product candidate
and may lead to a complete termination of our related product development efforts. 

We may not be able to manage our business effectively if we are unable to attract and retain key personnel.

We  may  not  be  able  to  attract  or  retain  qualified  management  and  commercial,  scientific  and  clinical  personnel  in  the  future  due  to  the  intense  competition  for  qualified
personnel among biotechnology, pharmaceutical and other businesses. If we are not able to attract and retain necessary personnel to accomplish our business objectives, we may
experience  constraints  that  will  significantly  impede  the  achievement  of  our  development  objectives,  our  ability  to  raise  additional  capital  and  our  ability  to  implement  our
business strategy.

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Our employees, consultants, or third-party partners may engage in misconduct or other improper activities, including but not necessarily limited to noncompliance with
regulatory standards and requirements or internal procedures, policies or agreements to which such employees, consultants and partners are subject, any of which could
have a material adverse effect on our business.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees, consultants, or third-party partners could include intentional failures to comply
with FDA regulations, provide accurate information to the FDA, comply with cGMPs, comply with federal and state healthcare fraud and abuse laws and regulations, report
financial  information  or  data  accurately,  comply  with  internal  procedures,  policies  or  agreements  to  which  such  employees,  consultants  or  partners  are  subject,  or  disclose
unauthorized  activities  to  us.  In  particular,  sales,  marketing  and  business  arrangements  in  the  healthcare  industry  are  subject  to  extensive  laws  and  regulations  intended  to
prevent  fraud,  kickbacks,  self-dealing  and  other  abusive  practices.  These  laws  and  regulations  may  restrict  or  prohibit  a  wide  range  of  pricing,  discounting,  marketing  and
promotion, sales commission, customer incentive programs and other business arrangements. Employee, consultant, or third-party misconduct could also involve the improper
use of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation, as well as civil and criminal liability.
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 governmental
investigations or other actions or lawsuits stemming from a failure to be in compliance with such 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 and results of operations, including the imposition of
significant fines or other civil and/or criminal sanctions.

We receive a large amount of proprietary information from potential or existing licensors of intellectual property and potential acquisition target companies, all pursuant to
confidentiality agreements. The confidentiality and proprietary invention assignment agreements that we have in place with each of our employees and consultants prohibit the
unauthorized disclosure of such information, but such employees or consultants may nonetheless disclose such information through negligence or willful misconduct. Any such
unauthorized disclosures could subject us to monetary damages and/or injunctive or equitable relief. The notes, analyses and memoranda that we have generated based on such
information are also valuable to our businesses, and the unauthorized disclosure or misappropriation of such materials by our employees and consultants could significantly
harm our strategic initiatives – especially if such disclosures are made to our competitors.

We face potential product liability exposure, and if successful claims are brought against us, we may incur substantial liability for one or more of our product candidates or
a future product candidate we may license or acquire and may have to limit their commercialization.

The use of one or more of our product candidates and any future product candidate we may license or acquire in clinical trials and the sale of any products for which we obtain
marketing approval expose us to the risk of product liability claims. For example, we may be sued if any product we develop allegedly causes injury or is found to be otherwise
unsuitable during clinical testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a
failure to warn of dangers inherent in the product, negligence, strict liability or a breach of warranties. Product liability claims might be brought against us by consumers, health
care  providers  or  others  using,  administering  or  selling  our  products.  If  we  cannot  successfully  defend  ourselves  against  these  claims,  we  will  incur  substantial  liabilities.
Regardless of merit or eventual outcome, liability claims may result in:

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withdrawal of clinical trial participants;

suspension or termination of clinical trial sites or entire trial programs;

decreased demand for any product candidates or products that we may develop;

initiation of investigations by regulators;

impairment of our business reputation;

costs of related litigation;

substantial monetary awards to patients or other claimants;

loss of revenues;

reduced resources of our management to pursue our business strategy; and

the inability to commercialize our product candidate or future product candidates.

We will obtain limited product liability insurance coverage for any and all of our upcoming clinical trials. However, our insurance coverage may not reimburse us or may not be
sufficient to reimburse us for any expenses or losses we may suffer. Moreover, insurance coverage is becoming increasingly expensive, and, in the future, we may not be able to
maintain insurance coverage at a reasonable cost or in sufficient amounts to protect us against losses due to liability. When needed we intend to expand our insurance coverage
to  include  the  sale  of  commercial  products  if  we  obtain  marketing  approval  for  one  or  more  of  our  product  candidates  in  development,  but  we  may  be  unable  to  obtain
commercially reasonable product liability insurance for any products approved for marketing. On occasion, large judgments have been awarded in class action lawsuits based on
drugs that had unanticipated side effects. A successful product liability claim or series of claims brought against us could cause our stock price to fall and, if judgments exceed
our insurance coverage, could decrease our cash and adversely affect our business.

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Our  future  growth  depends  in  part  on  our  ability  to  identify  and  acquire  or  in-license  products,  and  if  we  do  not  successfully  identify  and  acquire  or  in-license  related
product candidates or integrate them into our operations, we may have limited growth opportunities.

An important part of our business strategy is to continue to develop a pipeline of product candidates by acquiring or in-licensing products, businesses or technologies that we
believe  are  a  strategic  fit  with  our  focus  on ex  vivo  lentiviral  gene  therapy  for  rare  genetic  diseases  and  on  novel  combinations  of  CAR  T  cells  with  immuno-oncology
antibodies, other biologics, and small molecule kinase inhibitors. Future in-licenses or acquisitions, however, may entail numerous operational and financial risks, including,
but not necessarily limited to: 

·

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exposure to unknown liabilities;

disruption of our business and diversion of our management’s time and attention to develop acquired products or technologies;

difficulty or inability to secure financing to fund development activities for such acquired or in-licensed technologies in the current economic environment;

incurrence of substantial debt or dilutive issuances of securities to pay for acquisitions;

higher than expected acquisition and integration costs;

increased amortization expenses;

difficulty and cost in combining the operations and personnel of any acquired businesses with our operations and personnel;

impairment of relationships with key suppliers or customers of any acquired businesses due to changes in management and ownership; and

inability to retain key employees of any acquired businesses.

We  have  limited  resources  to  identify  and  execute  the  acquisition  or  in-licensing  of  third-party  products,  businesses  and  technologies  and  integrate  them  into  our  current
infrastructure.  In  particular,  we  may  compete  with  larger  pharmaceutical  companies  and  other  competitors  in  our  efforts  to  establish  new  collaborations  and  in-licensing
opportunities. These competitors likely will have access to greater financial resources than us and may have greater expertise in identifying and evaluating new opportunities.
Moreover, we may devote resources to potential acquisitions or in-licensing opportunities that are never completed, or we may fail to realize the anticipated benefits of such
efforts.

We may expend our limited resources to pursue a particular product candidate or indication and fail to capitalize on product candidates or indications that may be more
profitable or for which there is a greater likelihood of success.

Because we have limited financial and managerial resources, we focus on research programs and product candidates that we identify for specific indications. As a result, we
may forego or delay pursuit of opportunities with other product candidates or for other indications that later prove to have greater commercial potential. Our resource allocation
decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and development
programs and product candidates for specific indications may not yield any commercially viable products. If we do not accurately and/or effectively 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 fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could harm our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use, storage, treatment
and  disposal  of  hazardous  materials  and  wastes.  Our  operations  involve  the  use  of  hazardous  and  flammable  materials,  including  chemicals  and  biological  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. Although we believe that the safety procedures for handling and disposing of these materials comply with the standards prescribed
by these laws and regulations, we cannot eliminate the risk of accidental 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. We also could incur significant costs associated with
civil or criminal fines and penalties for failure to comply with such laws and regulations. 

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

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or future laws and
regulations may impair our research, development or production efforts. Our failure to comply with these laws and regulations also may result in substantial fines, penalties or
other sanctions.

We rely on information technology, and any internet or internal computer system failures, inadequacies, interruptions or compromises of our systems or the security of
confidential information could damage our reputation and harm our business.

Although a significant portion of our business is conducted using traditional methods of contact and communications such as face-to-face meetings, our business is increasingly
dependent  on  critical,  complex  and  interdependent  information  technology  systems,  including  internet-based  systems,  to  support  business  processes  as  well  as  internal  and
external communications. We could experience system failures and degradations in the future. We cannot assure you that we will be able to prevent an extended and/or material
system failure if any of the following or similar events occurs:

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human error;

subsystem, component, or software failure;

a power or telecommunications failure;

hacker attacks, cyber-attacks, software viruses, security breaches, unauthorized access or intentional acts of vandalism; or

terrorist acts or war.

If any of the foregoing events were to occur, our business operations could be disrupted in ways that would require the incurrence of substantial expenditures to remedy. Any
system failure, accident or security breach that causes interruptions in our operations could result in a material disruption of our drug development programs. For example, the
loss of clinical trial data from completed clinical trials for one or more of our product conducts 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  and  applications,  or
inappropriate/unauthorized disclosure of confidential or proprietary information (including trade secrets), we could incur liability and our business and financial condition could
be harmed.

The  occurrence  of  a  catastrophic  disaster  could  damage  our  facilities  beyond  insurance  limits,  or  we  could  lose  key  data  which  could  cause  us  to  curtail  or  cease
operations.

We  are  vulnerable  to  damage  and/or  loss  of  vital  data  from  natural  disasters,  such  as  earthquakes,  tornadoes,  power  loss,  fire,  health  epidemics  and  pandemics,  floods  and
similar events, as well as from accidental loss or destruction. If any disaster were to occur, our ability to operate our businesses could be seriously impaired. We have property,
liability and business interruption insurance that may not be adequate to cover losses resulting from disasters or other similar significant business interruptions, and we do not
plan to purchase additional insurance to cover such losses due to the cost of obtaining such coverage. Any significant losses that are not recoverable under our insurance policies
could seriously impair our business, financial condition and prospects. Any of the aforementioned circumstances, including without limitation the emerging COVID-19 virus,
may also impede our employees’ and consultants’ abilities to provide services in-person and/or in a timely manner; hinder our ability to raise funds to finance our operations on
favorable terms or at all; and trigger effectiveness of “force majeure” clauses under agreements with respect to which we receive goods and services, or under which we are
obligated to achieve developmental milestones on certain timeframes. Disputes with third parties over the applicability of such “force majeure” clauses, or the enforceability of
developmental milestones and related extension mechanisms in light of such business interruptions, may arise and may become expensive and time-consuming.

We  are  currently  reliant  on  the  City  of  Hope  National  Medical  Center,  the  Fred  Hutchinson  Cancer  Research  Center,  St.  Jude  Children’s  Research  Hospital,  and  the
University of Alabama at Birmingham for a substantial portion of our research and development efforts and the early clinical testing of our product candidates.

A substantial portion of our research and development has been and will continue to be conducted by COH, Fred Hutch, St. Jude, and UAB pursuant to a sponsored research
agreement and/or clinical trial agreements with each of those parties. As a result, our future success is heavily dependent on the results of research and development efforts of
Dr. Stephen Forman and his laboratory team at COH, of Dr. Brian Till and his laboratory team at Fred Hutch, of Drs. Stephen Gottschalk and Ewelina Mamcarz at St. Jude, and
of Dr. James M. Markert at UAB. We have limited control over the nature or timing of their research and limited visibility into their day-to-day activities, and as a result can
provide little assurance that their efforts will be successful.

CAR T is a new approach to cancer treatment that presents significant challenges. 

We have concentrated much of our research and development efforts on CAR T technology, and our future success is highly dependent on the successful development of T cell
immunotherapies in general and our CAR T technology and product candidates in particular. Because CAR T is a new approach to cancer immunotherapy and cancer treatment
generally, developing and commercializing our product candidates subjects us to a number of challenges, including, but not necessarily limited to:

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obtaining regulatory  approval  from  the  FDA  and  other  regulatory  authorities  that  may  have  very  limited  experience  with  the  commercial development  of  genetically
modified T cell therapies for cancer;

developing and deploying consistent and reliable processes for engineering a patient’s T cells ex vivo and infusing the engineered T cells back into the patient;

conditioning patients with chemotherapy in conjunction with delivering each of our products, which may increase the risk of adverse side effects of our products;

educating medical personnel regarding the potential side effect profile of each of our products;

developing processes for the safe administration of these products, including long-term follow-up for all patients who receive our product candidates;

sourcing clinical and, if approved, commercial supplies for the materials used to manufacture and process our product candidates;

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developing a manufacturing process and distribution network with a cost of goods that allows for an attractive return on investment;

establishing sales and marketing capabilities after obtaining any regulatory approval to gain market acceptance, and obtaining adequate coverage,  reimbursement  and
pricing by third-party payors and government authorities; and

developing therapies for types of cancers beyond those addressed by our current product candidates.

Product  candidates,  even  if  successfully  developed  and  commercialized,  may  be  effective  only  in  combating  certain  specific  types  of  cancer,  and  the  market  for  drugs
designed to combat such cancer type(s) may be small and unprofitable.

There are many different types of cancer, and a treatment that is effective against one type of cancer may not be effective against another. CAR T or other technologies we
pursue may only be effective in combating specific types of cancer but not others. Even if one or more of our products proves to be an effective treatment against a given type
of cancer, the number of patients suffering from such cancer may be small, in which case potential sales from a therapy designed to combat such cancer would be limited.

Our  gene  therapy  product  candidates  are  based  on  a  novel  technology,  which  makes  it  difficult  to  predict  the  time  and  cost  of  product  candidate  development  and
subsequently obtaining regulatory approval.

We  have  concentrated  a  portion  of  our  therapeutic  product  research  and  development  efforts  on  our  gene  therapy  platform,  and  our  future  success  depends,  in  part,  on  the
successful development of this therapeutic approach. There can be no assurance that any development problems we experience in the future related to our gene therapy platform
will  not  cause  significant  delays  or  unanticipated  costs,  or  that  such  development  problems  can  be  solved.  We  may  also  experience  delays  in  developing  a  sustainable,
reproducible and commercial-scale manufacturing process or transferring that process to commercial partners, which may prevent us from completing our clinical studies or
commercializing our products on a timely or profitable basis, if at all.

In  addition,  the  clinical  study  requirements  of  the  FDA,  the  European  Medicines Agency,  or  EMA,  and  other  regulatory  agencies  and  the  criteria  these  regulators  use  to
determine the safety and efficacy of a product candidate vary substantially according to the type, complexity, novelty and intended use and market of the potential products. 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
pharmaceutical or other product candidates. Currently, a limited number of gene therapy products, including CAR T therapies, have been approved by the FDA, the EMA and
the European Commission. Given the few precedents of approved gene therapy products, 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 the United States, the EU or other jurisdictions. Approvals by the EMA and the European Commission may not be indicative
of what the FDA may require for approval.

Regulatory requirements governing the development of gene 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 the Center for Biologics Evaluation and Research, or CBER, to consolidate the review of gene therapy and related products,
and to advise the CBER on its review. The FDA can put an investigational new drug application, or IND, on clinical hold if the information in an IND is not sufficient to assess
the  risks  in  pediatric  patients.  Before  a  clinical  study  can  begin  at  any  institution,  that  institution’s  IRB  and  its  Institutional  Biosafety  Committee  will  have  to  review  the
proposed clinical study to assess the safety of the study. Moreover, serious adverse events or developments in clinical trials of gene therapy product candidates conducted by
others may cause the FDA or other regulatory bodies to initiate a clinical hold on our clinical trials or otherwise change the requirements for approval of any of our product
candidates.

These  regulatory  review  agencies,  committees  and  advisory  groups  and  the  new  requirements  and  guidelines  they  promulgate  may  lengthen  the  regulatory  review  process,
require us to perform additional or larger studies, increase our development costs, lead to changes in regulatory positions and interpretations, delay or prevent approval and
commercialization  of  these  treatment  candidates  or  lead  to  significant  post-approval  studies,  limitations  or  restrictions. As  we  advance  our  product  candidates,  we  will  be
required  to  consult  with  these  regulatory  and  advisory  groups  and  comply  with  applicable  requirements  and  guidelines.  If  we  fail  to  do  so,  we  may  be  required  to  delay  or
discontinue development of our product candidates. 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 to maintain our business.

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Negative public opinion and increased regulatory scrutiny of the therapies that underpin many of our product candidates may damage public perception of our product
candidates or adversely affect our ability to conduct our business or obtain regulatory approvals for our product candidates.

Public perception may be influenced by claims that one or more of the therapies underpinning our product candidates, including without limitation gene therapy, is unsafe, and
such  therapy  may  not  gain  the  acceptance  of  the  public  or  the  medical  community.  In  particular,  the  success  of  our  gene  therapy  platforms  will  depend  upon  physicians
specializing in the treatment of those diseases that our product candidates target prescribing treatments that involve the use of our product candidates in lieu of, or in addition to,
existing treatments with which they are already familiar and for which greater clinical data may be available. More restrictive government regulations or negative public opinion
would have a negative effect on our business or financial condition and may delay or impair the development and commercialization of our product candidates or demand for
any  products  we  may  develop. Adverse  events  in  our  clinical  trials,  even  if  not  ultimately  attributable  to  our  product  candidates,  and  the  resulting  publicity,  could  lead  to
increased  governmental  regulation,  unfavorable  public  perception,  potential  regulatory  delays  in  the  testing  or  approval  of  our  potential  product  candidates,  stricter  labeling
requirements for those product candidates that do obtain approval and/or a decrease in demand for any such product candidates. Concern about environmental spread of our
products, whether real or anticipated, may also hinder the commercialization of our products.

Collaborative relationships with third parties could cause us to expend significant resources and incur substantial business risk with no assurance of financial return.

Establishing  strategic  collaborations  is  difficult  and  time-consuming.  Our  discussions  with  potential  collaborators  may  not  lead  to  the  establishment  of  collaborations  on
favorable terms, if at all. Potential collaborators may reject collaborations based upon their assessment of our financial, regulatory or intellectual property position. In addition,
there  has  been  a  significant  number  of  recent  business  combinations  among  large  pharmaceutical  companies  that  have  resulted  in  a  reduced  number  of  potential  future
collaborators.  Even  if  we  successfully  establish  new  collaborations,  these  relationships  may  never  result  in  the  successful  development  or  commercialization  of  product
candidates or the generation of sales revenue. To the extent that we enter into collaborative arrangements, the related product revenues are likely to be lower than if we directly
marketed and sold products. Such collaborators may also consider alternative product candidates or technologies for similar indications that may be available to collaborate on
and whether such a collaboration could be more attractive than the one with us for any future product candidate.

Risks Related to Intellectual Property

If we are unable to obtain and maintain patent protection for our technology and products, or if the scope of the patent protection obtained is not sufficiently broad, our
competitors  could  develop  and  commercialize  technology  and  products  similar  or  identical  to  ours,  and  our  ability  to  successfully  commercialize  our  technology  and
products may be impaired.

Our success depends, in large part, on our ability to obtain patent protection for product candidates and their formulations and uses. The patent application process is subject to
numerous  risks  and  uncertainties,  and  there  can  be  no  assurance  that  we  or  our  partners  will  be  successful  in  obtaining  patents  or  what  the  scope  of  an  issued  patent  may
ultimately be. These risks and uncertainties include, but are not necessarily limited to, the following:

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patent applications may not result in any patents being issued, or the scope of issued patents may not extend to competitive product candidates and their formulations
and uses developed or produced by others;

our  competitors,  many  of  which  have  substantially greater  resources  than  us  or  our  partners,  and  many  of  which  have  made  significant  investments  in  competing
technologies, may seek, or may already have obtained, patents that may limit or interfere with our abilities to make, use, and sell potential product candidates, file new
patent applications, or may affect any pending patent applications that we may have;

there may be significant pressure on the U.S. government and other international governmental bodies to limit the scope of patent protection both inside and outside the
United States for disease treatments that prove successful as a matter of public policy regarding worldwide health concerns; and

countries  other  than  the  United  States may  have  patent  laws  less  favorable  to  patentees  than  those  upheld  by  U.S.  courts,  allowing  foreign  competitors  a  better
opportunity to create, develop and market competing products.

In  addition,  patents  that  may  be  issued  or  in-licensed  may  be  challenged,  invalidated,  modified,  revoked,  circumvented,  found  to  be  unenforceable,  or  otherwise  may  not
provide  any  competitive  advantage.  Moreover,  we  may  be  subject  to  a  third-party  pre-issuance  submission  of  prior  art  to  the  USPTO,  or  become  involved  in  opposition,
derivation,  reexamination, inter partes  review,  post-grant  review  or  interference  proceedings  challenging  our  patent  rights  or  the  patent  rights  of  others.  The  costs  of  these
proceedings could be substantial, and it is possible that our efforts to establish priority of invention would be unsuccessful, resulting in a material adverse effect on our U.S.
patent positions. An adverse determination in any such submission, patent office trial, proceeding or litigation could reduce the scope of, render unenforceable, or invalidate, our
patent rights, allow third parties to commercialize our technologies or products and compete directly with us, without payment to us, or result in our inability to manufacture or
commercialize  products  without  infringing  third-party  patent  rights.  In  addition,  if  the  breadth  or  strength  of  protection  provided  by  our  patents  and  patent  applications  is
threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates. Third parties are often responsible
for maintaining patent protection for our product candidates, at our and their expense. If that party fails to appropriately prosecute and maintain patent protection for a product
candidate,  our  abilities  to  develop  and  commercialize  products  may  be  adversely  affected,  and  we  may  not  be  able  to  prevent  competitors  from  making,  using  and  selling
competing products. Such a failure to properly protect intellectual property rights relating to any of our product candidates could have a material adverse effect on our financial
condition and results of operations. In addition, U.S. patent laws may change, which could prevent or limit us from filing patent applications or patent claims to protect products
and/or technologies or limit the exclusivity periods that are available to patent holders, as well as affect the validity, enforceability, or scope of issued patents.

We and our licensors also rely on trade secrets and proprietary know-how to protect product candidates. Although we have taken steps to protect our and their trade secrets and
unpatented know-how, including entering into confidentiality and non-use agreements with third parties, and proprietary information and invention assignment agreements with
employees,  consultants  and  advisers,  third  parties  may  still  come  upon  this  same  or  similar  information  independently.  Despite  these  efforts,  any  of  these  parties  may  also
breach  the  agreements  and  may  unintentionally  or  willfully  disclose  our  or  our  licensors’  proprietary  information,  including  our  trade  secrets,  and  we  may  not  be  able  to
identify  such  breaches  or  obtain  adequate  remedies.  Enforcing  a  claim  that  a  party  illegally  disclosed  or  misappropriated  a  trade  secret  is  difficult,  expensive  and  time-
consuming, and the outcome is unpredictable. In addition, some courts inside and outside the United States are less willing or unwilling to protect trade secrets. Moreover, if any
of our or our licensors’ trade secrets were to be lawfully obtained or independently developed by a competitor, we and our licensors would have no right to prevent them, or
those  to  whom  they  communicate  it,  from  using  that  technology  or  information  to  compete  with  us.  If  any  of  our  or  our  licensors’  trade  secrets  were  to  be  disclosed  to  or
independently developed by a competitor, our competitive positions would be harmed.

The patent prosecution process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost
or in a timely manner. It is also possible that we will fail to identify any patentable aspects of our research and development output and methodology, and, even if we do, an
opportunity to obtain patent protection may have passed. Given the uncertain and time-consuming process of filing patent applications and prosecuting them, it is possible that
our product(s) or process(es) originally covered by the scope of the patent application may have changed or been modified, leaving our product(s) or process(es) without patent
protection. If our licensors or we fail to obtain or maintain patent protection or trade secret protection for one or more product candidates or any future product candidate we
may license or acquire, third parties may be able to leverage our proprietary information and products without risk of infringement, which could impair our ability to compete in
the market and adversely affect our ability to generate revenues and achieve profitability. Moreover, should we enter into other collaborations we may be required to consult
with  or  cede  control  to  collaborators  regarding  the  prosecution,  maintenance  and  enforcement  of  licensed  patents.  Therefore,  these  patents  and  applications  may  not  be
prosecuted and enforced in a manner consistent with the best interests of our business. 

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The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has in recent years been the
subject of much litigation. In addition, no consistent policy regarding the breadth of claims allowed in pharmaceutical or biotechnology patents has emerged to date in the U.S.
The patent situation outside the U.S. is even more uncertain. The laws of foreign countries may not protect our rights to the same extent as the laws of the U.S., and we may fail
to seek or obtain patent protection in all major markets. For example, European patent law restricts the patentability of methods of treatment of the human body more than U.S.
law does. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the U.S. and other jurisdictions are typically not
published  until  18  months  after  a  first  filing,  or  in  some  cases  not  at  all.  Therefore,  we  cannot  know  with  certainty  whether  we  or  our  licensors  were  the  first  to  make  the
inventions claimed in patents or pending patent applications that we own or licensed, or that we or our licensors were the first to file for patent protection of such inventions. In
the event that a third party has also filed a U.S. patent application relating to our product candidates or a similar invention, depending upon the priority dates claimed by the
competing parties, we may have to participate in interference proceedings declared by the USPTO to determine priority of invention in the U.S. We might also become involved
in  derivation  proceedings  in  an  event  that  a  third  party  misappropriates  one  or  more  of  our  inventions  and  files  their  own  patent  application  directed  to  such  one  or  more
inventions. The costs of these proceedings could be substantial, and it is possible that our efforts to establish priority of invention (or that a third party derived an invention from
us) would be unsuccessful, resulting in a material adverse effect on our U.S. patent position. As a result, the issuance, scope, validity, enforceability and commercial value of
our patent rights are highly uncertain. Our pending and future patent applications may not result in patents being issued which protect our technology or products, in whole or in
part, or which effectively prevent others from commercializing competitive technologies and products. Changes in either the patent laws or interpretation of the patent laws in
the  U.S.  and  other  countries  may  diminish  the  value  of  our  patents  or  narrow  the  scope  of  our  patent  protection.  For  example,  the  federal  courts  of  the  U.S.  have  taken  an
increasingly  dim  view  of  the  patent  eligibility  of  certain  subject  matter,  such  as  naturally  occurring  nucleic  acid  sequences,  amino  acid  sequences  and  certain  methods  of
utilizing the same, which include their detection in a biological sample and diagnostic conclusions arising from their detection. Such subject matter, which had long been a
staple of the biotechnology and biopharmaceutical industry to protect their discoveries, is now considered, with few exceptions, ineligible in the first instance for protection
under the patent laws of the U.S. Accordingly, we cannot predict the breadth of claims that may be allowed and remain enforceable in our patents or in those licensed from a
third party.

Recent patent reform legislation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued
patents. On September 16, 2011, the Leahy-Smith America Invents Act, or the Leahy-Smith Act, was signed into law. The Leahy-Smith Act includes a number of significant
changes to United States patent law. These include changes to transition from a “first-to-invent” system to a “first inventor-to-file” system and to the way issued patents are
challenged.  The  formation  of  the  Patent  Trial  and Appeal  Board  now  provides  a  less  burdensome,  quicker  and  less  expensive  process  for  challenging  issued  patents.  The
USPTO recently developed new regulations and procedures to govern administration of the Leahy-Smith Act, and many of the substantive changes to patent law associated with
the  Leahy-Smith Act,  and  in  particular,  the  first  inventor-to-file  provisions,  only  became  effective  on  March  16,  2013. Accordingly,  it  is  not  clear  what,  if  any,  impact  the
Leahy-Smith Act will have on the operation of our business. However, the Leahy-Smith Act and its implementation could increase the uncertainties and costs surrounding the
prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have a material adverse effect on our business and financial
condition.

Even if our patent applications issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors from competing with us
or  otherwise  provide  us  with  any  competitive  advantage.  Our  competitors  may  be  able  to  circumvent  our  owned  or  licensed  patents  by  developing  similar  or  alternative
technologies or products in a non-infringing manner.

We also may rely on the regulatory period of market exclusivity for any of our biologic product candidates that are successfully developed and approved for commercialization.
Although this period in the United States is generally 12 years from the date of marketing approval (depending on the nature of the specific product), there is a risk that the U.S.
Congress could amend laws to significantly shorten this exclusivity period. Once any regulatory period of exclusivity expires, depending on the status of our patent coverage
and the nature of the product, we may not be able to prevent others from marketing products that are biosimilar to or interchangeable with our products, which would materially
adversely affect our business.

We depend on our licensors for the maintenance and enforcement of intellectual property covering certain of our product candidates and have limited control, if any, over
the  amount  or  timing  of  resources  that  our  licensors  devote  on  our  behalf,  or  whether  any  financial  difficulties  experienced  by  our  licensors  could  result  in  their
unwillingness or inability to secure, maintain and enforce patents protecting certain of our product candidates.

We depend on our licensors to protect the proprietary rights covering our product candidates and we have limited, if any, control over the amount or timing of resources that
they  devote  on  our  behalf,  or  the  priority  they  place  on,  maintaining  patent  rights  and  prosecuting  patent  applications  to  our  advantage.  Moreover,  we  have  limited,  if  any,
control over the strategies and arguments employed in the maintenance of patent rights and the prosecution of patent applications to our advantage. Our licensors might become
involved in disputes with one of their other licensees, and we or a portion of our licensed patent rights might become embroiled in such disputes.

Our  licensors,  depending  on  the  patent  or  application,  are  responsible  for  maintaining  issued  patents  and  prosecuting  patent  applications.  We  cannot  be  sure  that  they  will
perform as required. Should they decide they no longer want to maintain any of the patents licensed to us, they are required to afford us the opportunity to do so at our expense.
If our licensors do not perform, and if we do not assume the maintenance of the licensed patents in sufficient time to make required payments or filings with the appropriate
governmental  agencies,  we  risk  losing  the  benefit  of  all  or  some  of  those  patent  rights.  Moreover,  and  possibly  unbeknownst  to  us,  our  licensors  may  experience  serious
difficulties related to their overall business or financial stability, and they may be unwilling or unable to continue to expend the financial resources required to maintain and
prosecute these patents and patent applications. While we intend to take actions reasonably necessary to enforce our patent rights, we depend, in part, on our licensors to protect
a substantial portion of our proprietary rights and to inform us of the status of those protections and efforts thereto.

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Our licensors may also be notified of alleged infringement and be sued for infringement of third-party patents or other proprietary rights. We may have limited, if any, control or
involvement over the defense of these claims, and our licensors could be subject to injunctions and temporary or permanent exclusionary orders in the U.S. or other countries.
Our  licensors  are  not  obligated  to  defend  or  assist  in  our  defense  against  third-party  claims  of  infringement.  We  have  limited,  if  any,  control  over  the  amount  or  timing  of
resources, if any, that our licensors devote on our behalf or the priority they place on defense of such third-party claims of infringement.

Because of the uncertainty inherent in any patent or other litigation involving proprietary rights, we or our licensors may not be successful in defending claims of intellectual
property infringement alleged by third parties, which could have a material adverse effect on our results of operations. Regardless of the outcome of any litigation, defending the
litigation may be expensive, time-consuming and distracting to management.

Because it is difficult and costly to protect our proprietary rights, we may not be able to ensure their protection.

The degree of future protection for our proprietary rights is uncertain, because legal means afford only limited protection and may not adequately protect our rights or permit us
to gain or keep our competitive advantage, in addition to being costly and time consuming to undertake. For example: 

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our licensors might not have been the first to make the inventions covered by each of our pending patent applications and issued patents;

our licensors might not have been the first to file patent applications for these inventions;

others may independently develop similar or alternative technologies or duplicate our product candidates or any future product candidate technologies;

it is possible that none of the pending patent applications licensed to us will result in issued patents;

the scope of our issued patents may not extend to competitive products developed or produced by others;

the issued patents covering our product candidates or any future product candidate may not provide a basis for market exclusivity for active products, may not provide us
with any competitive advantages, or may be challenged by third parties;

we may not develop additional proprietary technologies that are patentable; or

intellectual property rights of others may have an adverse effect on our business.

We may become involved in lawsuits to protect or enforce our patents or other intellectual property, which could be expensive, time consuming and unsuccessful.

Competitors may infringe our issued patents or other intellectual property. To counter infringement or unauthorized use, we may be required to file one or more actions for
patent infringement, which can be expensive and time consuming. Any claims we assert against accused infringers could provoke these parties to assert counterclaims against
us alleging that we infringe their patents; or provoke those parties to petition the USPTO to institute inter partes review against the asserted patents, which may lead to a finding
that all or some of the claims of the patent are invalid. In addition, in a patent infringement proceeding, a court may decide that a patent of ours is invalid or unenforceable, in
whole or in part, construe the patent’s claims narrowly or refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the
technology in question or as a matter of public policy. An adverse result in any litigation proceeding could put one or more of our patents at risk of being invalidated, rendered
unenforceable, or interpreted narrowly. Furthermore, adverse results on U.S. patents may affect related patents in our global portfolio.

If we or our licensors are sued for infringing intellectual property rights of third parties, it will be costly and time consuming, and an unfavorable outcome in that litigation
would have a material adverse effect on our business.

Our success also depends on our ability, and the abilities of any of our respective current or future collaborators, to develop, manufacture, market and sell product candidates
without infringing the proprietary rights of third parties. Numerous U.S. and foreign issued patents and pending patent applications, which are owned by third parties, exist in
the  fields  in  which  we  are  developing  products,  some  of  which  may  be  directed  at  claims  that  overlap  with  the  subject  matter  of  our  or  our  licensors’  intellectual  property.
Because patent applications can take many years to issue, there may be currently pending applications, unknown to us, which may later result in issued patents that our product
candidates  or  proprietary  technologies  may  infringe.  Similarly,  there  may  be  issued  patents  relevant  to  our  product  candidates  of  which  we  or  our  licensors  are  not  aware.
Publications  of  discoveries  in  the  scientific  literature  often  lag  behind  the  actual  discoveries,  and  patent  applications  in  the  U.S.  and  other  jurisdictions  are  typically  not
published until 18 months after a first filing, or in some cases not at all. Therefore, we cannot know with certainty whether we or such licensors were the first to make the
inventions claimed in patents or pending patent applications that we own or licensed, or that we and our licensors were the first to file for patent protection of such inventions. In
the event that a third party has also filed a U.S. patent application relating to our product candidates or a similar invention, depending upon the priority dates claimed by the
competing parties, we may have to participate in interference proceedings declared by the USPTO to determine priority of invention in the U.S. The costs of these proceedings
could be substantial, and it is possible that our efforts to establish priority of invention would be unsuccessful, resulting in a material adverse effect on our U.S. patent position.
As a result, the issuance, scope, validity, enforceability and commercial value of our or any of our licensors’ patent rights are highly uncertain.

There is a substantial amount of litigation involving patent and other intellectual property rights in the biotechnology and biopharmaceutical industries generally. If a third party
claims that we or any of our licensors, suppliers or collaborators infringe the third party’s intellectual property rights, we may have to, among other things:

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obtain additional licenses, which may not be available on commercially reasonable terms, if at all;

abandon an infringing product candidate or redesign products or processes to avoid infringement, which may demand substantial funds, time and resources and which
may result in inferior or less desirable processes and/or products;

pay substantial damages, including the possibility of treble damages and attorneys’ fees, if a court decides that the product or proprietary technology at issue  infringes
on or violates the third party’s rights;

pay substantial royalties, fees and/or grant cross-licenses to our product candidates; and/or

defend  litigation  or  administrative  proceedings which  may  be  costly  regardless  of  outcome,  and  which  could  result  in  a  substantial  diversion  of  financial  and
management resources.

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

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
technical and management personnel from their normal responsibilities. 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 conduct such litigation or proceedings adequately. 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. Uncertainties resulting from the initiation
and continuation of patent litigation or other proceedings could compromise our ability to compete in the marketplace.

We may need to license certain intellectual property from third parties, and such licenses may not be available or may not be available on commercially reasonable terms.

A  third  party  may  hold  intellectual  property,  including  patent  rights  that  are  important  or  necessary  to  the  development  and  commercialization  of  our  products.  It  may  be
necessary for us to use the patented or proprietary technology of third parties, who may or may not be interested in granting such a license, to commercialize our products, in
which case we would be required to obtain a license from these third parties on commercially reasonable terms, or our business could be harmed, possibly materially.

If we fail to comply with our obligations in our intellectual property licenses and funding arrangements with third parties, we could lose rights that are important to our
business.

We are currently a party to license agreements with St. Jude, COH, Fred Hutch, UCLA, Nationwide and other institutions. In the future, we may become party to licenses that
are  important  for  product  development  and  commercialization.  If  we  fail  to  comply  with  our  obligations  under  current  or  future  license  and  funding  agreements,  our
counterparties may have the right to terminate these agreements, in which event we might not be able to develop, manufacture or market any product or utilize any technology
that is covered by these agreements or may face other penalties under the agreements. Such an occurrence could materially and adversely affect the value of a product candidate
being developed under any such agreement or could restrict our drug discovery activities. Termination of these agreements or reduction or elimination of our rights under these
agreements may result in our having to negotiate new or reinstated agreements with less favorable terms, or cause us to lose our rights under these agreements, including our
rights to important intellectual property or technology.

40

 
 
 
 
 
 
 
 
We may be subject to claims that our employees and/or consultants have wrongfully used or disclosed to us alleged trade secrets of their former employers or other clients.

As is common in the biopharmaceutical industry, we rely on employees and consultants to assist in the development of product candidates, many of whom were previously
employed  at,  or  may  have  previously  been  or  are  currently  providing  consulting  services  to,  other  biopharmaceutical  companies,  including  our  competitors  or  potential
competitors. We may become subject to claims related to whether these individuals have inadvertently or otherwise used, disclosed or misappropriated trade secrets or other
proprietary information of their former employers or their former or current clients. Litigation may be necessary to defend against these claims. Even if we are successful in
defending these claims, litigation could result in substantial costs and be a distraction to management and/or the employees or consultants that are implicated.

If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.

In addition to seeking patent protection for our product candidates or any future product candidate, we also rely on trade secrets, including unpatented know-how, technology
and  other  proprietary  information,  to  maintain  our  competitive  position,  particularly  where  we  do  not  believe  patent  protection  is  appropriate  or  obtainable.  However,  trade
secrets are difficult to protect. We limit disclosure of such trade secrets where possible but we also seek to protect these trade secrets, in part, by entering into non-disclosure and
confidentiality  agreements  with  parties  who  do  have  access  to  them,  such  as  our  employees,  our  licensors,  corporate  collaborators,  outside  scientific  collaborators,  contract
manufacturers,  consultants,  advisors  and  other  third  parties.  We  also  enter  into  confidentiality  and  invention  or  patent  assignment  agreements  with  our  employees  and
consultants. Despite these efforts, any of these parties may breach the agreements and may unintentionally or willfully disclose our proprietary information, including our trade
secrets, and we may not be able to obtain adequate remedies for such breaches. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult,
expensive and time-consuming, and the outcome is unpredictable. In addition, some courts inside and outside the United States are less willing or unwilling to protect trade
secrets. Moreover, if any of our trade secrets were to be lawfully obtained or independently developed by a competitor, we would have no right to prevent them, or those to
whom they communicate it, from using that technology or information to compete with us. If any of our trade secrets were to be disclosed to or independently developed by a
competitor, our competitive position would be harmed.

Because  we  in-license  intellectual  property  pertaining  to  certain  product  candidates  from  third  parties,  any  dispute  with  the  licensors  or  the  non-performance  of  such
license agreements may adversely affect our ability to develop and commercialize the applicable product candidates.

The types of disputes which may arise between us and the third parties from whom we license intellectual property include, but are not limited to: 

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the scope of rights granted under such license agreements and other interpretation-related issues;

the extent to which our technology and processes infringe on intellectual property of the licensor that is not subject to such license agreements;

the scope and interpretation of the representations and warranties made to us by our licensors, including those pertaining to the licensors’ right title and interest in the
licensed technology and the licensors’ right to grant the licenses contemplated by such agreements;

the sublicensing of patent and other rights under our license agreements and/or collaborative development relationships, and the rights and obligations associated with
such sublicensing, including whether or not a given transaction constitutes a sublicense under such license agreement;

the diligence and development obligations under license agreements (which may include specific diligence milestones) and what activities or achievements satisfy those
diligence obligations;

whether or not the milestones associated with certain milestone payment obligations have been achieved or satisfied;

the applicability or scope of indemnification claims or obligations under such license agreements;

the permissibility and advisability of, and strategy regarding, the pursuit of potential third-party infringers of the intellectual property that is the subject of such license
agreements;

the calculation of royalty, sublicense revenue and other payment obligations under such license agreements;

the extent to which license rights, if any, are retained by licensors under such license agreements;

whether or not a material breach has occurred under such license agreements and the extent to which such breach, if deemed to have occurred, is or can be cured within
applicable cure periods, if any;

disputes regarding patent filing and prosecution decisions, as well as payment obligations regarding past and ongoing patent expenses;

intellectual property rights resulting from the joint creation or use of intellectual property (including improvements made to licensed intellectual property) by our and
our partners’ licensors and us and our partners; and

the priority of invention of patented technology.

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In addition, the agreements under which we currently license intellectual property or technology from third parties are complex, and certain provisions in such agreements may
be susceptible to multiple interpretations or may conflict in such a way that puts us in breach of one or more agreements, which would make us susceptible to lengthy and
expensive disputes with one or more of such third-party licensing partners. The resolution of any contract interpretation disagreement that may arise could narrow what we
believe to be the scope of our rights to the relevant intellectual property or technology, or increase what we believe to be our financial or other obligations under the relevant
agreements, either of which could have a material adverse effect on our business, financial condition, results of operations and prospects. Moreover, if disputes over intellectual
property that we have licensed prevent or impair our ability to maintain our current licensing arrangements on commercially acceptable terms, we may be unable to successfully
develop  and  commercialize  the  affected  product  candidates,  which  could  have  a  material  adverse  effect  on  our  business,  financial  conditions,  results  of  operations  and
prospects.

Risks Related to Our Finances and Capital Requirements

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

We  are  an  emerging  growth  company  with  a  limited  operating  history.  We  have  focused  primarily  on  in-licensing  and  developing  our  product  candidates,  with  the  goal  of
supporting regulatory approval for these product candidates. We have incurred losses since our inception in March 2015 and have an accumulated deficit of $125.5 million as of
December 31, 2019. We expect to continue to incur significant operating losses for the foreseeable future. We also do not anticipate that we will achieve profitability for a period
of  time  after  generating  material  revenues,  if  ever.  If  we  are  unable  to  generate  revenues,  we  will  not  become  profitable  and  may  be  unable  to  continue  operations  without
continued funding.

Because of the numerous risks and uncertainties associated with developing pharmaceutical products, we are unable to predict the timing or amount of increased expenses or
when or if, we will be able to achieve profitability. Our net losses may fluctuate significantly from quarter to quarter and year to year. We anticipate that our expenses will
increase substantially if:

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one or  more  of  our  product  candidates  receive  regulatory  approval  and  are  approved  for  commercial sale,  due  to  our  need  to  establish  the  necessary  commercial
infrastructure  to  launch this  product  candidate  without  substantial  delays,  including  hiring  sales  and  marketing personnel  and  contracting  with  third  parties  for
warehousing, distribution, cash collection and related commercial activities;

we are required by the FDA or foreign regulatory authorities to perform studies in addition to those currently expected;

there are any delays in completing our clinical trials or the development of any of our product candidates;

we execute other collaborative, licensing or similar arrangements that require us to make payments to collaborators or licensors;

there are variations in the level of expenses related to our future development programs;

there are any product liability or intellectual property infringement lawsuits in which we may become involved; and

there are any regulatory developments affecting product candidates of our competitors.

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Our ability to become profitable depends upon our ability to generate revenue. To date, we have not generated any revenue from our development stage products, and we do not
know when, or if, we will generate any revenue. Our ability to generate revenue depends on a number of factors, including, but not limited to, our ability to:

·

obtain regulatory approval for one or more of our product candidates, or any future product candidate that we may license or acquire;

· manufacture or have manufactured commercial quantities of one or more of our product candidates or any future product candidate, if approved, at acceptable cost

levels; and

·

develop a commercial organization and the supporting infrastructure required to successfully market and sell one or more of our product candidates or any future product
candidate, if approved.

Even 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
depress  the  value  of  our  company  and  could  impair  our  ability  to  raise  capital,  expand  our  business,  maintain  our  research  and  development  efforts,  diversify  our  product
offerings or even continue our operations. A decline in the value of our company could also cause you to lose all or part of your investment.

Our short operating history makes it difficult to evaluate our business and prospects. 

We have only been conducting operations since our incorporation in March 2015. Our operations to date have been limited to preclinical operations and the in-licensing of our
product candidates. We have not yet demonstrated an ability to successfully complete clinical trials, obtain regulatory approvals, manufacture a clinical scale or commercial
scale product, or arrange for a third party to do so on our behalf, or conduct sales and marketing activities necessary for successful product commercialization. Consequently,
any  predictions  about  our  future  performance  may  not  be  as  accurate  as  they  could  be  if  we  had  a  history  of  successfully  developing  and  commercializing  pharmaceutical
products.

In addition, as a young business, we may encounter unforeseen expenses, difficulties, complications, delays and other known and unknown factors. We will need to expand our
capabilities to support commercial activities. We may not be successful in adding such capabilities.

We expect our financial condition and operating results to continue to fluctuate significantly from quarter to quarter and year to year due to a variety of factors, many of which
are beyond our control. Accordingly, you should not rely upon the results of any past quarterly period as an indication of future operating performance. 

We do not have any products that are approved for commercial sale and therefore do not expect to generate any revenues from product sales in the foreseeable future, if
ever.

We have not generated any product related revenues to date, and do not expect to generate any such revenues for at least the next several years, if at all. To obtain revenues from
sales of our product candidates, we must succeed, either alone or with third parties, in developing, obtaining regulatory approval for, manufacturing and marketing products
with commercial potential. We may never succeed in these activities, and we may not generate sufficient revenues to continue our business operations or achieve profitability.

We will require substantial additional funding which may not be available to us on acceptable terms, or at all. If we fail to raise the necessary additional capital, we may be
unable to complete the development and commercialization of our product candidates, or continue our development programs.

Our operations have consumed substantial amounts of cash since inception. We expect to significantly increase our spending to advance the preclinical and clinical development
of  our  product  candidates  and  launch  and  commercialize  any  product  candidates  for  which  we  may  receive  regulatory  approval,  including  building  our  own  commercial
organizations to address certain markets. We will require additional capital for the further development and, if approved, commercialization of our product candidates, as well as
to fund our other operating expenses and capital expenditures. As of December 31, 2019, we had $62.4 million in cash and restricted cash. We cannot provide any assurance
that we will be able to raise funds to complete the development of our product candidates. Additionally, we may have to delay or terminate the development of certain product
candidates if we are unable to secure additional funding; any such delay or termination, or the announcement of any such delay or termination, may impact our potential growth
and have a material adverse effect on the value of our debt and equity securities.

We  cannot  be  certain  that  additional  funding  will  be  available  on  acceptable  terms,  or  at  all.  If  we  are  unable  to  raise  additional  capital  in  sufficient  amounts  or  on  terms
acceptable to us, we may have to significantly delay, scale back or discontinue the development or, if approved, commercialization of one or more of our product candidates.
We  may  also  seek  collaborators  for  one  or  more  of  our  current  or  future  product  candidates  at  an  earlier  stage  than  otherwise  would  be  desirable  or  on  terms  that  are  less
favorable than might otherwise be available. Any of these events could significantly harm our business, financial condition and prospects.

43

 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
Our future funding requirements will depend on many factors, including, but not limited to:

·

·

·

·

·

·

·

·

·

·

the timing, design and conduct of, and results from, preclinical studies and clinical trials for our product candidates;

the potential for delays in our efforts to seek regulatory approval for our product candidates, and any costs associated with such delays;

the costs of establishing a commercial organization to sell, market and distribute our product candidates;

the rate of progress and costs of our efforts to prepare for the submission of an NDA or BLA for any product candidates that we may in-license or acquire in the future,
and the potential that we may need to conduct additional clinical trials to support applications for regulatory approval;

the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights associated with our product candidates, including any
such costs we may be required to expend if our licensors are unwilling or unable to do so;

the cost and timing of securing sufficient supplies of our product candidates from our contract manufacturers for clinical trials and in preparation for commercialization;

the effect of competing technological and market developments;

the terms and timing of any collaborative, licensing, co-promotion or other arrangements that we may establish;

if one or more of our product candidates are approved, the potential that we may be required to file a lawsuit to defend our patent rights or regulatory exclusivities from
challenges by companies seeking to market generic versions of one or more of our product candidates; and

the success of the commercialization of one or more of our product candidates, if approved.

Future  capital  requirements  will  also  depend  on  the  extent  to  which  we  acquire  or  invest  in  additional  complementary  businesses,  products  and  technologies,  although  we
currently have no commitments or agreements relating to any of these types of transactions.

In order to carry out our business plan and implement our strategy, we anticipate that we will need to obtain additional financing from time to time and may choose to raise
additional funds through strategic collaborations, licensing arrangements, public or private equity or debt financing, bank lines of credit, asset sales, government grants, or other
arrangements. We cannot be sure that any additional funding, if needed, will be available on terms favorable to us or at all. Furthermore, any additional equity or equity-related
financing  may  be  dilutive  to  our  stockholders,  and  debt  or  equity  financing,  if  available,  may  subject  us  to  restrictive  covenants  and  significant  interest  costs.  If  we  obtain
funding through a strategic collaboration or licensing arrangement, we may be required to relinquish our rights to certain of our product candidates or marketing territories.

Our inability to raise capital when needed would harm our business, financial condition and results of operations, and could cause our stock value to decline or require that we
wind down our operations altogether.

Raising additional capital may cause dilution to our existing stockholders, restrict our operations or require us to relinquish proprietary rights.

Until such time, if ever, as we can generate substantial product revenue, we expect to finance our cash needs through a combination of equity offerings, debt financings, grants
and  license  and  development  agreements  in  connection  with  any  collaborations.  To  the  extent  that  we  raise  additional  capital  through  the  sale  of  equity  or  convertible  debt
securities,  your  ownership  interest  will  be  diluted,  and  the  terms  of  these  securities  may  include  liquidation  or  other  preferences  that  adversely  affect  your  rights  as  a
stockholder.  Debt  financing  and  preferred  equity  financing,  if  available,  may  involve  agreements  that  include  covenants  limiting  or  restricting  our  ability  to  take  specific
actions, such as incurring additional debt, making capital expenditures or declaring dividends.

44

 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable
rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise
additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization
efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

We will continue to incur significant increased costs as a result of operating as a public company, and our management will be required to devote substantial time to new
compliance initiatives.

As a public company, we incur significant legal, accounting and other expenses under the Sarbanes-Oxley Act of 2002, or the Sarbanes-Oxley Act, as well as rules subsequently
implemented by the SEC, and the rules of the Nasdaq Stock Exchange. These rules impose various requirements on public companies, including requiring establishment and
maintenance of effective disclosure and financial controls and appropriate corporate governance practices. Our management and other personnel have devoted and will continue
to devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations increase our legal and financial compliance costs and make some
activities more time-consuming and costly. For example, these rules and regulations make it more difficult and more expensive for us to obtain director and officer liability
insurance, and we may be required to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. As a result, it may be
more difficult for us to attract and retain qualified persons to serve on our board of directors, our board committees or as executive officers. 

The Sarbanes-Oxley Act requires, among other things, that we maintain effective internal controls for financial reporting and disclosure controls and procedures. As a result, we
are  required  to  periodically  perform  an  evaluation  of  our  internal  controls  over  financial  reporting  to  allow  management  to  report  on  the  effectiveness  of  those  controls,  as
required by Section 404 of the Sarbanes-Oxley Act. Additionally, our independent auditors are required to perform a similar evaluation and report on the effectiveness of our
internal controls over financial reporting. These efforts to comply with Section 404 and related regulations have required, and continue to require, the commitment of significant
financial and managerial resources. While we anticipate maintaining the integrity of our internal controls over financial reporting and all other aspects of Section 404, we cannot
be certain that a material weakness will not be identified when we test the effectiveness of our control systems in the future. If a material weakness is identified, we could be
subject to sanctions or investigations by the SEC or other regulatory authorities, which would require additional financial and management resources, costly litigation or a loss
of public confidence in our internal controls, which could have an adverse effect on the market price of our stock.

Compliance  with  the  Sarbanes-Oxley  Act  of  2002  will  require  substantial  financial  and  management  resources  and  may  increase  the  time  and  costs  of  completing  an
acquisition. 

A business that we identify as a potential acquisition target may not be in compliance with the provisions of the Sarbanes-Oxley Act regarding the adequacy of internal controls.
The development of the internal controls of any such entity to achieve compliance with the Sarbanes-Oxley Act may increase the time and costs necessary to complete any such
acquisition. Furthermore, any failure to implement required new or improved controls, or difficulties encountered in the implementation of adequate controls over our financial
processes and reporting in the future, could harm our operating results or cause us to fail to meet our reporting obligations. Inferior internal controls could also cause investors
to lose confidence in our reported financial information, which could have a negative effect on the trading price of our securities. 

We  are  an  “emerging  growth  company”  and  a  "smaller  reporting  company,"  and  the  reduced  disclosure  requirements  applicable  to  emerging  growth  companies  and
smaller reporting companies may make our common stock less attractive to investors. 

We are an “emerging growth company” as that term is used in the JOBS Act, and may remain an emerging growth company until the earlier of (1) the last day of the fiscal year
(a) following the fifth anniversary of the completion of the initial public offering of our common stock, (b) in which we have total annual gross revenue of at least $1.07 billion,
or (c) in which we are deemed to be a large accelerated filer, which means the market value of our outstanding common stock that are held by non-affiliates exceeds $700
million as of the prior June 30, and (2) the date on which we have issued more than $1.0 billion in non-convertible debt during the prior three year period. For so long as we
remain an emerging growth company, we are permitted and intend to rely on exemptions from certain disclosure requirements that are applicable to other public companies that
are not emerging growth companies. These exemptions include:

·

·

·

being permitted  to  provide  only  two  years  of  audited  financial  statements,  in  addition  to  any  required  unaudited  interim  financial statements,  with  correspondingly
reduced “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure in this Annual Report on Form 10-K;

not being required to comply with any requirement that may be adopted by the Public Company Accounting Oversight Board regarding mandatory audit firm rotation or
a supplement to the auditor’s report providing additional information about the audit and the financial statements;

disclosure obligations regarding executive compensation; and

45

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
·

exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not
previously approved.

Further,  Section  102(b)(1)  of  the  JOBS Act  exempts  emerging  growth  companies  from  being  required  to  comply  with  new  or  revised  financial  accounting  standards  until
private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange
Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period
and comply with the requirements that apply to non-emerging growth companies but any such an election to opt out is irrevocable. We have elected to opt out of such extended
transition  period  which  means  that  when  a  standard  is  issued  or  revised,  and  it  has  different  application  dates  for  public  or  private  companies,  we,  as  an  emerging  growth
company, will adopt the new or revised standard. This may make comparison of our financial statements with another public company which has opted into using the extended
transition period difficult or impossible because of the potential differences in accountant standards used.

We are also a smaller reporting company, and we will remain a smaller reporting company until the fiscal year following the  determination  that  our  voting  and  non-voting
common shares held by non-affiliates is more than $250 million measured on the last business day of our second fiscal quarter, or our annual revenues are more than $100
million during the most recently completed fiscal year and our voting and non-voting common shares held by non-affiliates is more than $700 million measured on the last
business day of our second fiscal quarter. Similar to emerging growth companies, smaller reporting companies are able to provide simplified executive compensation disclosure,
are exempt from the auditor attestation requirements of Section 404, and have certain other reduced disclosure obligations, including, among other things, being required to
provide only two years of audited financial statements and not being required to provide selected financial data, supplemental financial information or risk factors.

We have elected to take advantage of certain of the reduced reporting obligations available to us. We cannot predict whether investors will find our common stock less attractive
if we rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our
stock price may be reduced or more volatile.  

Our ability to use our pre-change NOLs and other pre-change tax attributes to offset post-change taxable income or taxes may be subject to limitation.

We may, from time to time, carry net operating loss carryforwards (“NOLs”) as deferred tax assets on our balance sheet.  Under Sections 382 and 383 of the Internal Revenue
Code of 1986, as amended, if a corporation undergoes an “ownership change” (generally defined as a greater than 50-percentage- point cumulative change (by value) in the
equity ownership of certain stockholders over a rolling three-year period), the corporation’s ability to use its pre-change NOLs and other pre-change tax attributes to offset its
post-change taxable income or taxes may be limited. We may experience ownership changes in the future as a result of shifts in our stock ownership, some of which changes
are outside our control. As a result, our ability to use our pre-change NOLs and other pre-change tax attributes to offset post-change taxable income or taxes may be subject to
limitation.

Raising funds through lending arrangements may restrict our operations or produce other adverse results.

Our  current  Loan Agreement  with  Horizon,  which  we  entered  into  in  March  2019,  contains  a  variety  of  affirmative  and  negative  covenants,  including  required  financial
reporting, limitations on certain dispositions of assets, limitations on the incurrence of additional debt and other requirements. To secure our performance of our obligations
under this Loan Agreement, we granted a security interest in substantially all of our assets, other than certain intellectual property assets, to Horizon. Our failure to comply with
the covenants in the Loan Agreement, the occurrence of a material impairment in our prospect of repayment or in the perfection or priority of Horizon’s lien on our assets, as
determined by Horizon, or the occurrence of certain other specified events could result in an event of default that, if not cured or waived, could result in the acceleration of all or
a substantial portion of our debt, potential foreclosure on our assets and other adverse results. Additionally, we are bound by certain negative covenants setting forth actions that
are  not  permitted  to  be  taken  during  the  term  of  the  Loan Agreement  without  consent  of  Horizon,  including,  without  limitation,  incurring  certain  additional  indebtedness,
making  certain  asset  dispositions,  entering  into  certain  mergers,  acquisitions  or  other  business  combination  transactions  or  incurring  any  non-permitted  lien  or  other
encumbrance on our assets. The foregoing prohibitions and constraints on our operations could result in our inability to: (i) acquire promising intellectual property or other
assets on desired timelines or terms; (ii) reduce costs by disposing of assets or business segments no longer deemed advantageous to retain; (iii) stimulate further corporate
growth or development through the assumption of additional debt; or (iv) enter into other arrangements that necessitate the imposition of a lien on corporate assets.

Risks Relating to Securities Markets and Investment in Our Stock

Our stock may be subject to substantial price and volume fluctuations due to a number of factors, many of which are beyond our control and may prevent our stockholders
from reselling our common stock at a profit.

The  market  prices  for  securities  of  biotechnology  and  pharmaceutical  companies  have  historically  been  highly  volatile,  and  the  market  has  from  time  to  time  experienced
significant price and volume fluctuations that are unrelated to the operating performance of particular companies.

46

 
 
 
 
 
 
  
 
 
 
 
 
 
  
The market price of our common stock is likely to be highly volatile and may fluctuate substantially due to many factors, including:

·

announcements concerning  the  progress  of  our  efforts  to  obtain  regulatory  approval  for  and  commercialize  our  product  candidates  or  any  future product  candidate,
including  any  requests  we  receive  from  the  FDA  for  additional  studies  or  data  that  result  in  delays  in obtaining  regulatory  approval  or  launching  these  product
candidates, if approved;

· market conditions in the pharmaceutical and biotechnology sectors or the economy as a whole;

·

·

·

·

·

·

·

·

·

·

·

price and volume fluctuations in the overall stock market;

the failure of one or more of our product candidates or any future product candidate, if approved, to achieve commercial success;

announcements of the introduction of new products by us or our competitors;

developments concerning product development results or intellectual property rights of others;

litigation or public concern about the safety of our potential products;

actual fluctuations in our quarterly operating results, and concerns by investors that such fluctuations may occur in the future;

deviations in our operating results from the estimates of securities analysts or other analyst comments;

additions or departures of key personnel;

health care reform legislation, including measures directed at controlling the pricing of pharmaceutical products, and third-party coverage and reimbursement policies;

developments concerning current or future strategic collaborations; and

discussion of us or our stock price by the financial and scientific press and in online investor communities.

Fortress controls a voting majority of our common stock.

Pursuant to the terms of the Class A Preferred Stock held by Fortress, Fortress is entitled to cast, for each share of Class A Preferred held by Fortress, the number of votes that is
equal to one and one-tenth (1.1) times a fraction, the numerator of which is the sum of (A) the shares of outstanding common stock and (B) the whole shares of common stock
into  which  the  shares  of  outstanding  Class A  common  shares  and  the  Class A  Preferred  Stock  are  convertible  and  the  denominator  of  which  is  the  number  of  shares  of
outstanding Class A Preferred Stock. Accordingly, Fortress is able to control or significantly influence all matters requiring approval by our stockholders, including the election
of directors and the approval of mergers or other business combination transactions. The interests of Fortress may not always coincide with the interests of other stockholders,
and Fortress may take actions that advance its own interests and are contrary to the desires of our other stockholders. Moreover, this concentration of voting power may delay,
prevent or deter a change in control of us even when such a change may be in the best interests of all stockholders, could deprive our stockholders of an opportunity to receive a
premium for their common stock as part of a sale of Mustang or our assets, and might affect the prevailing market price of our common stock.

47

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fortress has the right to receive a significant grant of shares of our common stock annually which will result in the dilution of your holdings of common stock upon each
grant, which could reduce their value.

Under the terms of the Second Amended and Restated Founders Agreement, which became effective July 22, 2016, Fortress will receive a grant of shares of our common stock
equal to two and one-half percent (2.5%) of the gross amount  of  any  equity  or  debt  financing. Additionally,  the  Class A  Preferred  Stock,  as  a  class,  will  receive  an  annual
dividend  on  January  1st,  payable  in  shares  of  common  stock  in  an  amount  equal  to  two  and  one-half  percent  (2.5%)  of  our  fully-diluted  outstanding  capital  stock  as  of  the
business day immediately prior to January 1st of such year. Fortress currently owns all outstanding shares of Class A Preferred Stock. These share issuances to Fortress and any
other holder of Class A Preferred Stock will dilute your holdings in our common stock and, if the value of Mustang has not grown proportionately over the prior year, would
result in a reduction in the value of your shares. The Second Amended and Restated Founders Agreement has a term of 15 years and renews automatically for subsequent one-
year periods unless terminated by Fortress or upon a Change in Control (as defined in the Second Amended and Restated Founders Agreement).

We might have received better terms from unaffiliated third parties than the terms we receive in our agreements with Fortress.

The agreements we have entered into with Fortress include a Management Services Agreement and the Founders Agreement. While we believe the terms of these agreements
are reasonable, they might not reflect terms that would have resulted from arm’s-length negotiations between unaffiliated third parties. The terms of the agreements relate to,
among other things, payment of a royalty on product sales and the provision of employment and transition services. We might have received better terms from third parties
because, among other things, third parties might have competed with each other to win our business.

The  dual  roles  of  our  directors  who  also  serve  in  similar  roles  with  Fortress  could  create  a  conflict  of  interest  and  will  require  careful  monitoring  by  our  independent
directors. 

We share some directors with Fortress. This could create conflicts of interest between the two companies in the future.  While we believe that the Founders Agreement and the
Management Services Agreement were negotiated by independent parties on both sides on arm’s length terms, and the fiduciary duties of both parties were thereby satisfied, in
the future situations may arise under the operation of both agreements that may create a conflict of interest. We will have to be diligent to ensure that any such situation is
resolved by independent parties. In particular, under the Management Services Agreement, Fortress and its affiliates are free to pursue opportunities which could potentially be
of  interest  to  Mustang,  and  they  are  not  required  to  notify  Mustang  prior  to  pursuing  such  opportunities. Any  such  conflict  of  interest  or  pursuit  by  Fortress  of  a  corporate
opportunity independent of Mustang could expose us to claims by our investors and creditors and could harm our results of operations.

We may become involved in securities class action litigation that could divert management’s attention and harm our business.

The stock markets have from time to time experienced significant price and volume fluctuations that have affected the market prices for the common stock of biotechnology and
pharmaceutical  companies.  These  broad  market  fluctuations  may  cause  the  market  price  of  our  stock  to  decline.  In  the  past,  securities  class  action  litigation  has  often  been
brought  against  a  company  following  a  decline  in  the  market  price  of  its  securities.  This  risk  is  especially  relevant  for  us  because  biotechnology  and  biopharmaceutical
companies have experienced significant stock price volatility in recent years. We may become involved in this type of litigation in the future. Litigation often is expensive and
diverts management’s attention and resources, which could adversely affect our business.

 Item 1B.

Unresolved Staff Comments

None.    

 Item 2.

Properties

Our corporate and executive office is located at 377 Plantation Street, Worcester, MA 01605.

On October 27, 2017, we entered into a lease agreement with WCS - 377 Plantation Street, Inc., a Massachusetts nonprofit corporation (“Landlord”). Pursuant to the terms of
the lease agreement, we agreed to lease 27,043 sf from the Landlord, located at 377 Plantation Street in Worcester, MA (the “Facility”), through November 2026, subject to
additional extensions at our option. Base rent, net of abatements of $0.6 million over the lease term, totals approximately $3.6 million, on a triple-net basis.

The Facility became operational for the production of personalized CAR T and gene therapies in 2018. 

 Item 3.

Legal Proceedings

We are not involved in any litigation that we believe could have a material adverse effect on our financial position or results of operations. There is no action, suit, proceeding,
inquiry or investigation before or by any court, public board, government agency, self-regulatory organization or body pending or, to the knowledge of our executive officers,
threatened against or affecting our company or our officers or directors in their capacities as such.

 Item 4.

Mine Safety Disclosures

Not applicable

48

 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 Item 5.

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

Market information

 PART II

Our  common  stock  has  been  quoted  on  the  NASDAQ  Global  Market  since August  22,  2017,  under  the  symbol  “MBIO.”  Prior  to  this  there  was  no  public  market  for  our
common stock.

Securities Authorized for Issuance Under Equity Compensation Plans 

On November 30, 2017, we filed a registration statement on Form S-8 under the Securities Act registering the common stock issued, issuable or reserved for issuance under our
2016 Plan. That registration statement became effective immediately upon filing, and shares covered by the registration statement are eligible for sale in the public markets,
subject to grant of the underlying awards, vesting provisions and Rule 144 limitations applicable to our affiliates.

Holders of Record

As of December 31, 2019,  there were approximately 123 holders of record of our common stock and one holder of record for our Class A common stock. The actual number of
stockholders of our common shares is greater than this number of record holders and includes stockholders who are beneficial owners, but whose shares are held in street name
by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividends

We have never paid or declared any cash dividends on our common stock, and we do not anticipate paying any cash dividends on our common stock in the foreseeable future.
We intend to retain all available funds and any future earnings to fund the development and expansion of our business. Any future determination to pay dividends will be at the
discretion of our board of directors and will depend upon a number of factors, including our results of operations, financial condition, future prospects, contractual restrictions,
restrictions imposed by applicable law and other factors our board of directors deems relevant.

Recent Sales of Unregistered Securities

None.

 Item 6.

Selected Financial Data

Not applicable.

 Item 7.

Management’s Discussion and Analysis of the Results of Operations

Statements  in  the  following  discussion  and  throughout  this  report  that  are  not  historical  in  nature  are  “forward-looking  statements.”  You  can  identify  forward-looking
statements by the use of words such as “expect,” “anticipate,” “estimate,” “may,” “will,” “should,” “intend,” “believe,” and similar expressions. Although we believe the
expectations reflected in these forward-looking statements are reasonable, such statements are inherently subject to risk and we can give no assurances that our expectations
will  prove  to  be  correct.  Actual  results  could  differ  from  those  described  in  this  report  because  of  numerous  factors,  many  of  which  are  beyond  our  control.  These  factors
include,  without  limitation,  those  described  under  Item  1A  “Risk  Factors.”  We  undertake  no  obligation  to  update  these  forward-looking  statements  to  reflect  events  or
circumstances after the date of this report or to reflect actual outcomes. Please see “Forward-Looking Statements” at the beginning of this Form 10-K.  

The following discussion of our financial condition and results of operations should be read in conjunction with our financial statements and the related notes thereto and other
financial information appearing elsewhere in this Form 10-K. We undertake no obligation to update any forward-looking statements in the discussion of our financial condition
and results of operations to reflect events or circumstances after the date of this report or to reflect actual outcomes.

Overview

Mustang Bio, Inc. (“Mustang,” “We,” “Us” or the “Company”) is a clinical-stage biopharmaceutical company focused on translating today’s medical breakthroughs in cell and
gene therapies into potential cures for hematologic cancers, solid tumors and rare genetic diseases. We aim to acquire rights to these technologies by licensing or otherwise
acquiring an ownership interest in the technologies, funding their research and development and eventually either out-licensing or bringing the technologies to market.

49

 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Our pipeline is currently focused in three core areas: gene therapy programs for rare genetic disorders, CAR T therapies for hematologic malignancies and CAR T therapies for
solid tumors. For each therapy we have partnered with world class research institutions. For our gene therapy programs we have partnered with St. Jude in the development of a
first-in-class ex vivo lentiviral treatment of XSCID, and for our CAR T therapies we have partnered with the COH, Fred Hutch and Nationwide.

Gene Therapy

In partnership with St. Jude, our gene therapy program (MB-107) is being conducted under an exclusive license to develop a potentially curative treatment for XSCID, a rare
genetic immune system condition in which affected patients do not live beyond infancy without treatment. This first-in-class ex vivo lentiviral gene therapy is currently in two
Phase  1/2  clinical  trials:  a  multicenter  trial  in  newly  diagnosed  infants  sponsored by  St.  Jude  and  a  single-center  trial  in  previously  transplanted  patients  sponsored  by the
National Institutes of Health (“NIH”). We plan to file separate Investigational New Drug Applications in 2020 in order to conduct a pivotal non-randomized phase 2 registration
trial in each of the two patient populations.

CAR T Therapies

Our pipeline of CAR T therapies is being developed under exclusive licenses from several world class research institutions. Our strategy is to license these technologies, support
preclinical and clinical research activities by our partners and transfer the underlying technology to our cell processing facility located in Worcester, Massachusetts, to conduct
our own clinical trials.

We  are  developing  CAR  T  therapies  for  hematologic  malignancies  in  partnership  with  COH  targeting  CD123  (MB-102)  and  CS1  (MB-104)  and  with  Fred  Hutch  targeting
CD20  (MB-106).  Phase  1  clinical  trials  sponsored  by  COH  for  MB-102  and  MB-104  and  by  Fred  Hutch  for  MB-106  are  underway.  In  the  third  quarter  of  2019  the  FDA
approved our IND application to initiate a multicenter Phase 1/2 clinical trial of MB-102, and our clinical trial is expected to begin enrollment in the first half of 2020 for the
treatment of patients with acute myeloid leukemia, blastic plasmacytoid dendritic cell neoplasm, and high-risk myelodysplastic syndrome. We expect to file an IND for MB-104
in the second half of 2020 and to initiate our own Phase 1 clinical trial shortly thereafter for the treatment of patients with multiple myeloma. We also plan to file an IND and
initiate our own clinical trial for MB-106 for the treatment of patients with non-Hodgkin lymphoma and chronic lymphocytic leukemia. 

We are also developing CAR T therapies for solid tumors in partnership with COH targeting IL13Ra2 (MB-101), HER2 (MB-103) and PSCA (MB-105). In addition, we have
partnered with Nationwide for the C134 oncolytic virus (MB-108) in order to enhance the activity of MB-101 for the treatment of patients with GBM. Phase 1 clinical trials
sponsored by COH for MB-101, MB-103 and MB-105 are underway. A Phase 1 clinical trial sponsored by UAB for MB-108 began during the third quarter of 2019 and, in the
second half of 2020, we plan to file an IND for the combination of MB-101 and MB-108 for the treatment of patients with GBM. We also plan to file INDs and initiate our own
clinical trials for MB-103 for the treatment of patients with metastatic breast cancer to brain and for MB-105 for the treatment of patients with prostate and pancreatic cancer.

Recent Events

MB-101 (IL13Rα2 CAR T for Glioblastoma) 

In October 2019, Mustang announced that COH received $4.1 million in grant awards for a clinical trial of MB-101 (IL13Rα2-targeted CAR T) in combination with nivolumab
(commercial name: Opdivo®) and ipilimumab (commercial name: Yervoy®) in patients with recurrent malignant glioma. The trial, which is now enrolling patients, is the first
human  study  to  combine  IL13Rα2-targeted  CAR  T  cell  therapy  with  checkpoint  inhibitors,  as  well  as  the  first  to  locally  deliver  CAR  T  cells  with  systemic  nivolumab
combination treatment. Additional information on the trial can be found on www.CinicalTrials.gov using identifier NCT04003649.

MB-105 (PSCA CAR T for Prostate & Pancreatic Cancers) 

In September 2019, we announced that COH had opened and initiated patient treatments in a Phase 1 clinical trial of MB-105, a PSCA CAR T technology for the treatment of
prostate cancer. Additional information on the Phase 1 trial can be found on www.CinicalTrials.gov using identifier NCT03873805.

50

 
 
 
 
 
 
 
 
 
 
 
 
 
 
MB-102 (CD123 CAR T for AML) 

On August  5,  2019,  we  announced  that  the  FDA  had  approved  our  IND  application  to  initiate  a  multi-center  Phase  1/2  clinical  trial  of  MB-102  (CD123  CAR  T)  in  acute
myeloid leukemia (“AML”), blastic plasmacytoid dendritic cell neoplasm (“BPDCN”) and high-risk myelodysplastic syndrome (“hrMDS”). We will begin enrollment on our
MB-102 clinical trial in the first half of 2020 and process patient cells in our manufacturing facility, which opened in June 2018. Additional information on the trial can be
found on www.CinicalTrials.gov using identifier NCT04109482.

In July 2019, we announced that the FDA had granted Orphan Drug Designation to MB-102 (CD123 CAR T) for the treatment of AML. The FDA also previously granted
Orphan Drug Designation to MB-102 for the treatment of BPDCN. The FDA grants Orphan Drug Designation to drugs and biologics that are intended for the safe and effective
treatment, diagnosis or prevention of rare diseases or disorders that affect fewer than 200,000 people in the U.S. Orphan Drug Designation provides certain incentives, such as
tax credits toward the cost of clinical trials and prescription drug user fee waivers. If a product holding Orphan Drug Designation receives the first FDA approval for the disease
in which it has such designation, the product is entitled to seven years of market exclusivity, which is independent from intellectual property protection.

MB-103 (HER2 CAR T for GBM & Metastatic Breast Cancer to Brain) 

In August 2019, we announced that the California Institute for Regenerative Medicine had awarded a $9.3 million grant to Dr. Saul Priceman at COH to conduct a Phase 1
clinical trial evaluating the safety and effectiveness of intraventricular delivery of HER2-directed CAR T cells to the brains of patients with HER2-positive breast cancer with
brain metastases. City of Hope exclusively licensed MB-103 to us in 2017. Additional information on the Phase 1 trial can be found on  www.CinicalTrials.gov using identifier
NCT03696030.

MB-106 (CD20-targeted CAR T cell therapy)

In February 2020, we announced that the first subject treated with the optimized MB-106 (CD20-targeted, autologous CAR T cell therapy) manufacturing process, developed in
collaboration between Mustang and Fred Hutch, has achieved a complete response (CR) at the lowest starting dose in an ongoing Phase 1/2 clinical trial. The Phase 1/2, open-
label, dose-escalation trial is evaluating the maximum tolerated dose of MB-106. Secondary endpoints include safety and toxicity, preliminary antitumor activity as measured
by overall response rate and complete remission rate, progression-free survival, and overall survival. Fred Hutch intends to enroll approximately 30 subjects on the trial, which
is being led by principal investigator Mazyar Shadman, M.D., M.P.H., Assistant Member of Fred Hutch’s Clinical Research Division. Additional information on the Phase 1/2
trial can be found on www.CinicalTrials.gov using identifier NCT03277729.

MB-107 (Ex vivo Lentiviral Therapy for X-linked Severe Combined Immunodeficiency (XSCID)) 

In April 2019, the New England Journal of Medicine published data from St. Jude. The data is from a Phase 1/2 clinical trial of a lentiviral gene therapy for the treatment of
newly diagnosed infants under two years old with XSCID, also known as bubble boy disease. The data demonstrates that the lentiviral gene therapy achieved normalization of
T-cell  numbers  in  all  eight  newly  diagnosed  infants  with  XSCID  to  date,  and  disseminated  infections  resolved  completely  in  all  affected  infants.  Seven  of  the  eight  infants
treated have developed normal IgM levels to date. Four of those seven infants have discontinued monthly infusions of intravenous immunoglobulin (“IVIG”) therapy to date.
Three of those four infants who discontinued monthly IVIG infusions have responded to vaccines to date.

In August 2019, the Company, together with St. Jude, announced that MB-107 was granted the Regenerative Medicine Advanced Therapy (“RMAT”) designation by the FDA.
Under the RMAT designation, the FDA will help facilitate the program’s expedited development and review and provide guidance on generating the evidence needed to support
the approval of MB-107 for XSCID.

Also in August 2019, we entered into a license agreement with CSL Behring (Calimmune) for the CytegrityTM stable producer cell line developed and used by St. Jude. The
Cytegrity™ stable producer cell line will be used to produce the viral vector for MB-107.

Updated Phase 1/2 clinical data for MB-107 were selected for oral and poster presentations at the 61st American Society of Hematology (“ASH”) Annual Meeting, which was
held  in  December  2019.  Data  demonstrated  that  MB-107  preceded  by  low-dose  busulfan  conditioning  continued  to  be  well  tolerated  and  resulted  in  the  development  of  a
functional immune system in newly diagnosed infants with XSCID, as well as in previously transplanted patients with XSCID who had experienced declining T cell function
and recurrent infections. In this latter population, the enhanced transduction procedure demonstrated faster time to NK cell recovery and faster recovery from chronic norovirus
infection. 

51

 
 
 
 
 
 
 
 
 
 
 
 
 
 
MB-108 (C134 Oncolytic Virus for GBM) 

In  February  2019,  we  partnered  and  entered  into  an  exclusive  worldwide  license  agreement  with  Nationwide  Children’s  Hospital  to  develop  an  oncolytic  virus  (C134),  an
attenuated herpes simplex virus type 1, for the treatment of GBM. We intend to combine MB-108 with MB-101 (IL13Rα2 CAR T) to potentially enhance efficacy in treating
GBM.

In  May  2019,  the  FDA  granted  Orphan  Drug  Designation  to  MB-108  for  the  treatment  of  malignant  glioma,  a  type  of  brain  cancer  with  a  median  survival  of  less  than  18
months.

In October 2019, we announced that the first participant was dosed in a Phase 1 clinical trial to determine the safety and efficacy of MB-108 in recurrent GBM. Additional
information on the Phase 1 trial can be found on www.CinicalTrials.gov using identifier NCT03657576.

Shelf Registration

In August 2019, we filed a shelf registration statement No. 333-233350 on Form S-3 (the “2019 Mustang S-3”), which was declared effective on September 30, 2019. Under the
2019 Mustang S-3, we may sell up to a total of $75.0 million of our securities. As of December 31, 2019, no sales were made under the 2019 Mustang S-3.

Term Loan

On March 29, 2019 (the “Closing Date”), the Company entered into a $20.0 million Loan Agreement with Horizon, the proceeds of  which  will  provide  the  Company  with
additional working capital to continue development of its gene and cell therapies. In accordance with the Loan Agreement, $15.0 million of the $20.0 million loan was funded
on the Closing Date, with the remaining $5.0 million fundable upon the Company achieving certain predetermined milestones.

At-the-Market Offering

On July 13, 2018, the Company filed a shelf registration statement No. 333-226175 on Form S-3, as amended on July 20, 2018 (the “2018 Mustang S-3”), which was declared
effective in August 2018. Under the 2018 Mustang S-3, the Company may sell up to a total of $75.0 million of its securities. In connection with the 2018 Mustang S-3, the
Company entered into an At-the-Market Issuance Sales Agreement (the “Mustang ATM”) with B. Riley FBR, Inc., Cantor Fitzgerald & Co., National Securities Corporation,
and Oppenheimer & Co. Inc. (each an "Agent" and collectively, the “Agents”), relating to the sale of shares of common stock. Under the Mustang ATM, the Company pays the
Agents a commission rate of up to 3.0% of the gross proceeds from the sale of any shares of common stock.

During the year ended December 31, 2019, the Company issued approximately 3.5 million shares of common stock at an average price of $6.42 per share for gross proceeds of
$22.5 million under the Mustang ATM. In connection with these sales, we paid aggregate fees of approximately $0.5 million for net proceeds of approximately $22.0 million.
No sales were made under the 2018 Mustang ATM in 2018.

Public Offering of Common Stock

On April 30, 2019, we announced the pricing of an underwritten public offering, whereby we sold 6,875,000 shares of common stock, (plus a 30-day option to purchase up to
an additional 1,031,250 shares of common stock, which was fully exercised) at a price of $4.00 per share for gross proceeds of approximately $31.6 million, before deducting
underwriting discounts and commissions and offering expenses. In connection with the public offering, the Company paid aggregate fees of approximately $2.1 million for net
proceeds of approximately $29.5 million. The shares were sold under the 2018 Mustang S-3, filed with the Securities and Exchange Commission. The offering closed on May 2,
2019, and the over-allotment closing was on May 8, 2019.

Authorized Stock

On August  16,  2019,  the  Company’s  Board  adopted  resolutions  of  the  Board  to  ratify,  approve  and  recommend  stockholder  approval  of  an  amendment  to  the  Company’s
Amended and Restated Certificate of Incorporation, as amended, to revise Article IV, Authorized Stock thereof in order to effect an increase in the authorized number of shares
of  the  Company’s  common  stock,  par  value  $0.0001,  from  50.0  million  to  85.0  million  (the  “Amendment”).  On August  16,  2019,  the  Company  received  approval  of  the
Amendment  by  written  consent  in  lieu  of  a  meeting  from  the  holders  of  a  majority  of  issued  and  outstanding  shares  of  the  Company’s  common  and  preferred  stock.  The
increase in authorized shares to 85.0 million became effective on September 30, 2019.

To date, we have not received approval for the sale of our product candidates in any market and, therefore, have not generated any product sales from our product candidates. In
addition, we have incurred substantial operating losses since our inception, and expect to continue to incur significant operating losses for the foreseeable future and may never
become profitable. As of December 31, 2019, we have an accumulated deficit of $125.5 million.

52

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
We are a majority-controlled subsidiary of Fortress Biotech, Inc. (“Fortress”). As a “Controlled Company” we rely on the exemption provided by Nasdaq Listing Rule 5615(c)
(2), which permits us to maintain less than a majority of independent directors on our board.

Critical Accounting Policies and Use of Estimates

See Note 2 to our Financial Statements.

Results of Operations

Comparison of the Years Ended December 31, 2019 and 2018

($ in thousands)
Operating expenses:

Research and development
Research and development – licenses acquired
General and administrative

Total operating expenses
Loss from operations

Other income (expense)

Interest income
Interest expense

Total other income (expense)
Net Loss

Research and Development Expenses 

For the year ended December 31,

2019

2018

Change

$

%

$

$

30,042    $
6,273     
9,570     
45,885     
(45,885)    

1,263     
(1,767)    
(504)    
(46,389)   $

21,104    $
3,360     
6,759     
31,223     
(31,223)    

569     
(8)    
561     
(30,662)   $

8,938     
2,913     
2,811     
14,662     
(14,662)    

694     
(1,759)    
(1,065)    
(15,727)    

42%
87%
42%
47%
47%

122%
21992%
-190%
51%

Research and development expenses primarily consist of personnel related expenses, including salaries, benefits, travel, and other related expenses, stock-based compensation,
payments  made  to  third  parties  for  license,  sponsored  research  and  milestone  costs  related  to  in-licensed  products  and  technology,  payments  made  to  third  party  contract
research organizations for preclinical and clinical studies, investigative sites for clinical trials, consultants, the cost of acquiring and manufacturing clinical trial materials, costs
associated with regulatory filings, laboratory costs and other supplies.

For the year ended December 31, 2019, research and development expenses were approximately $30.0 million, compared to approximately $21.1 million, an increase of $8.9
million. For the year ended December 31, 2019, research and development expenses primarily consisted of $6.1 million for Sponsored Research and Clinical Trial Agreements
with  our  academic  partners,  $7.8  million  for  personnel  compensation  and  benefits,  $0.9  million  for  stock  compensation  expense,  $4.4  million  for  laboratory  supplies,  $3.2
million related to consulting and outside services, $3.6 million for clinical trial costs, $0.9 million related to facility costs, and $1.3 million depreciation expense. For the year
ended December 31, 2018, research and development expenses primarily consisted of $5.7 million for Sponsored Research and Clinical Trial Agreements with our academic
partners,  $4.3  million  for  personnel  compensation  and  benefits,  $3.4  million  for  stock  compensation  expense,  $2.3  million  for  laboratory  supplies,  $1.1  million  related  to
consulting and outside services, $0.5 million related to facility costs, and $0.6 million depreciation expense.

For the year ended December 31, 2019, research and development expenses - licenses acquired were approximately $6.3 million, compared to approximately $3.4 million, an
increase of $2.9 million. For the year ended December 31, 2019, research and development expenses - licenses acquired consisted of $4.9 million for the annual stock dividend
to Fortress, $0.2 million for an upfront fee for our license with Nationwide Children’s Hospital, $0.2 million for our license with CSL Behring (Calimmune), $0.3 million for a
development milestone paid to UCLA in connection with MB-105 and $0.7 million in connection with our licenses with COH. For the year ended December 31, 2018, research
and development expenses - licenses acquired consisted of $2.1 million for the annual stock dividend to Fortress, $1.0 million for an upfront fee for our license with St. Jude for
the treatment of XSCID and $0.3 million in connection with our licenses with COH.

We  expect  our  research  and  development  activities  to  increase  as  we  develop  our  existing  product  candidates  and  potentially  acquire  new  product  candidates,  reflecting
increasing costs associated with the following:

·

·

·

·

·

·

employee-related expenses, which include salaries and benefits;

license fees and milestone payments related to in-licensed products and technology;

expenses incurred under agreements with contract research organizations, investigative sites and consultants that conduct our clinical trials and our preclinical activities;

facility expenses, which include rent, utilities and maintenance costs;

the cost of acquiring and manufacturing clinical trial materials; and

costs associated with non-clinical activities, and regulatory approvals.

53

 
 
  
 
 
 
  
 
 
   
 
 
   
   
   
 
 
 
      
      
      
  
 
 
 
 
 
 
 
 
 
 
 
 
      
      
      
  
 
 
      
      
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related expenses, including stock-based compensation, for executives and other administrative personnel,
recruitment expenses, professional fees and other corporate expenses, including investor relations, legal activities including patent fees, and facilities-related expenses.

For the year ended December 31, 2019, general and administrative expenses were approximately $9.6 million, compared to approximately $6.8 million, an increase of $2.8
million.  For  the  year  ended  December  31,  2019,  general  and  administrative  expenses  primarily  consisted  of  $1.7  million  for  legal  and  professional  fees,  $1.7  million  for
personnel  compensation  and  benefits,  $1.8  million  for  stock  compensation  expense,  $1.7  million  for  the  equity  fee  on  issuance  of  common  shares  to  Fortress  Biotech,  $1.1
million related to consulting fees and $0.5 million for insurance and taxes. For the year ended December 31, 2018, general and administrative expenses consisted primarily of
$1.3 million for legal and professional fees, $1.5 million for personnel compensation and benefits, $1.5 million for stock compensation expense and $0.6 million for insurance
and taxes.

We anticipate general and administrative expenses will increase in future periods, reflecting continued and increasing costs associated with:

·

·

·

·

support of our expanded research and development activities, including additional product candidates entering the clinic;

stock compensation granted to key employees and non-employees;

support of business development activities; and

increased professional fees and other costs associated with the regulatory requirements and increased compliance associated with being a publicly traded company.

Other Income (Expense) 

Other income (expense) consists primarily of interest income earned on cash balances and short-term investments and interest expense on the Company’s notes payable. For the
year ended December 31, 2019 and 2018, total other income (expense) were approximately $0.5 million expense and $0.6 million income, respectively.

Liquidity and Capital Resources

The Company has incurred substantial operating losses and expects to continue to incur significant operating losses for the foreseeable future and may never become profitable.
As of December 31, 2019, the Company had an accumulated deficit of $125.5 million.

The Company has funded its operations to date primarily through the sale of equity. The Company expects to continue to use the proceeds from previous financing transactions
primarily  for  general  corporate  purposes,  including  financing  the  Company’s  growth,  developing  new  or  existing  product  candidates,  and  funding  capital  expenditures,
acquisitions  and  investments.  The  Company  currently  anticipates  that  its  cash  and  cash  equivalents  balances  as  of  December  31,  2019,  are  sufficient  to  fund  its  anticipated
operating cash requirements for at least one year from the date of this Form 10-K.

The Company will be required to expend significant funds in order to advance the development of its product candidates. The Company’s estimates as to how long it expects its
existing cash to be able to continue to fund its operations is based on assumptions that may prove to be inaccurate, and it could use its available capital resources sooner than it
currently expects, as a result of unforeseen events. Such changes in circumstances may require that the Company alter development plans of certain of its product candidates.
Accordingly, the Company will require additional financings through equity and debt offerings, collaborations and licensing arrangements or other sources to fully develop,
prepare regulatory filings, obtain regulatory approvals and commercialize its existing and any new product candidates. If the Company is unable to arrange for such financings,
or  unable  to  arrange  for  them  on  terms  acceptable  to  the  Company,  the  Company’s  current  development  plans  and  plans  for  expansion  of  its  facility  and  general  and
administrative infrastructure will be curtailed.

54

 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
Cash Flows for the Years Ended December 31, 2019 and 2018 

($ in thousands)
Statement of cash flows data:
Total cash (used in) provided by:

Operating activities
Investing activities
Financing activities

Net change in cash, cash equivalents and restricted cash

Operating Activities

For the year ended December 31,

2019

2018

  $

  $

(33,581)   $
13,909     
65,116     
45,444    $

(19,244)
557 
181 
(18,506)

Net cash used in operating activities was $33.6 million for the year ended December 31, 2019, compared to $19.2 million for the year ended December 31, 2018. Net cash used
in operating activities for the year ended December 31, 2019, was primarily due to approximately $46.4 million in net loss, partially offset by $4.9 million of common shares
issuable for Founders shares, $2.7 million of non-cash stock compensation expenses, $1.7 million of equity fee on issuance of common shares to Fortress Biotech, $1.4 million
of research and development-licenses acquired, $1.3 million of depreciation expense and $0.7 million of accretion of debt discount.

Net cash used in operating activities during the year ended December 31, 2018, was primarily due to approximately $30.7 million in net loss, partially offset by $5.0 million of
non-cash stock compensation expenses, $1.3 million of research and development-licenses acquired, $2.1 million of common shares issuable for Founders shares, $2.5 million
in change in operating assets and liabilities, and $0.6 million of depreciation expense.

Investing Activities

Net cash provided by investing activities was $13.9 million for the year ended December 31, 2019, representing our $17.6 million in maturities of certificates of deposits, offset
by $1.4 million in purchases of research and development licenses and $2.3 million in purchases of fixed assets. 

Net  cash  provided  by  investing  activities  was  $0.6  million  for  the  year  ended  December  31,  2018,  representing  our  purchase  of  $52.5  million  investment  in  certificates  of
deposits held to maturity, $6.9 million in purchases of fixed assets and construction in process, and $1.1 million in acquisition costs of acquired licenses, offset by $61.0 million
in maturities of certificates of deposits.

Financing Activities

Net cash provided by financing activities was $65.1 million during the year ended December 31, 2019, due to net proceeds of $13.6 million from the Horizon Notes; gross
proceeds of $22.5 million, net of offering costs of $0.5 million, from the Mustang ATM; and gross proceeds of $31.6 million, net of offering costs of $2.1 million, from our
May 2019 underwritten public offering.

Net cash provided by financing activities was $0.2 million during the year ended December 31, 2018, due to net proceeds from the exercise of warrants.

 Item 7A.

Quantitative and Qualitative Disclosures About Market Risks

Not applicable.

 Item 8.

Financial Statements and Supplementary Data.

The information required by this Item is set forth in the financial statements and notes thereto beginning at page F-1 of this Annual Report on Form 10-K.

 Item 9.

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

Not applicable.

55

 
 
 
 
 
 
 
   
 
 
 
      
  
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Item 9A.

Controls and Procedures.

Disclosure Controls and Procedures

Controls and Procedures

Disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) are designed only to provide reasonable assurance that they will meet their
objectives.  Under  the  supervision  and  with  the  participation  of  our  management,  including  our  principal  executive  officer  and  principal  financial  officer,  we  conducted  an
evaluation  of  the  effectiveness,  as  of  December  31,  2019,  of  the  design  and  operation  of  our  disclosure  controls  and  procedures,  as  such  term  is  defined  in  Exchange Act
Rules  13a-15(e)  and  15d-15(e).  Based  on  this  evaluation,  our  principal  executive  officer  and  principal  financial  officer  have  concluded  that,  as  of  such  date,  our  disclosure
controls and procedures are effective to ensure that information required to be disclosed by us in our Exchange Act reports 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  principal
executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Internal Control over Financial Reporting

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). Internal control over financial reporting refers to the process designed by, or under the supervision of, our principal executive officer and principal financial officer,
and effected by our Board of Directors, management and other personnel, 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, and 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 our assets;

(2)  provide  reasonable  assurance  that  transactions  are  recorded  as  necessary  to  permit  preparation  of  financial  statements  in  accordance  with  generally  accepted
accounting principles (“GAAP”), and that our receipts and expenditures are being made only in accordance with authorization of our management and directors; and

(3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisitions, use or disposition of our assets that could have a material effect
on the financial statements.

Internal  control  over  financial  reporting  has  inherent  limitations.  Internal  control  over  financial  reporting  is  a  process  that  involves  human  diligence  and  compliance  and  is
subject  to  lapses  in  judgment  and  breakdowns  resulting  from  human  failures.  Internal  control  over  financial  reporting  also  can  be  circumvented  by  collusion  or  improper
management  override.  Because  of  such  limitations,  there  is  a  risk  that  material  misstatements  may  not  be  prevented  or  detected  on  a  timely  basis  by  internal  control  over
financial reporting. However, these inherent limitations are known features of the financial reporting process. Therefore, it is possible to design into the process safeguards to
reduce, though not eliminate, this risk.

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2019. In making the assessment, management used the criteria
set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control - Integrated Framework (2013).

Based on our assessment, our management has concluded that, as of December 31, 2019, our internal controls over financial reporting were effective based upon those criteria.

Changes in Internal Controls over Financial Reporting.

There were no changes in our internal control over financial reporting during our most recent fiscal quarter that have materially affected, or are reasonably likely to materially
affect, our internal control over financial reporting.

 Item 9B.

Other Information

None.

56

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Item 10.

Directors, Executive Officers and Corporate Governance

 PART III

The information required by this Item is incorporated herein by reference from our Proxy Statement for our 2020 Annual Meeting of Stockholders.

 Item 11.

Executive Compensation

The information required by this Item is incorporated herein by reference from our Proxy Statement for our 2020 Annual Meeting of Stockholders.

 Item 12.

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by this Item is incorporated herein by reference from our Proxy Statement for our 2020 Annual Meeting of Stockholders.  

 Item 13.

Certain Relationships and Related Transactions, and Director Independence.

The information required by this Item is incorporated herein by reference from our Proxy Statement for our 2020 Annual Meeting of Stockholders.

 Item 14.

Principal Accounting Fees and Services.

The information required by this Item is incorporated herein by reference from our Proxy Statement for our 2020 Annual Meeting of Stockholders.   

 PART IV

 Item 15.

Exhibits, Financial Statement Schedules.

(a) Financial Statements.

The following financial statements are filed as part of this Form 10-K:

Report of Independent Registered Public Accounting Firm

Financial Statements:
Balance Sheets as of December 31, 2019 and 2018
Statements of Operations for the Years Ended December 31, 2019 and 2018
Statements of Changes in Stockholders’ Equity for the Years Ended December 31, 2019 and 2018
Statements of Cash Flows for the Years Ended December 31, 2019 and 2018
Notes to Financial Statements

(b) Exhibits. 

Exhibit No.
3.1

3.2

3.3

Amended and Restated Certificate of Incorporation of Mustang Bio, Inc. (formerly Mustang Therapeutics, Inc.), dated July 26, 2016. *
Filed as Exhibit 3.1 on the Company’s Form 10-12G filed on July 28, 2016.

Description

  Certificate of Amendment of the Amended and Restated Certificate of Incorporation of Mustang Bio, Inc., dated June 14, 2018. *
  Filed as Exhibit 3.1 on the Company’s Form 10-Q filed on August 13, 2018. 

  Certificate of Amendment of the Amended and Restated Certificate of Incorporation of Mustang Bio, Inc., dated September 30, 2019. *
  Filed as Exhibit 3.1 on the Company’s Form 8-K filed on September 30, 2019.

57

F-2

F-3
F-4
F-5
F-6
F-7 - F-24

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
3.4

4.1

4.2

4.3

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.8

10.9

10.10

10.11

10.12

Bylaws of Mustang Bio, Inc. *
Filed as Exhibit 3.2 on the Company’s Form 10-12G filed on July 28, 2016.

Specimen certificates evidencing shares of common stock, Class A common stock and Class A preferred stock. * 
Filed as Exhibit 4.1 on the Company’s Form 10-12G filed on July 28, 2016.

Form of warrant agreement.*
Filed as Exhibit 4.2 on the Company’s Form 10-12G filed on July 28, 2016.

  Description of Securities of Mustang Bio, Inc. **

Second Amended and Restated Founders Agreement between Fortress Biotech, Inc. and Mustang Bio, Inc., dated July 26, 2016. *
Filed as Exhibit 10.1 on the Company’s Form 10-12G filed on July 28, 2016.

Management Services Agreement between Fortress Biotech, Inc. and Mustang Bio, Inc., dated March 13, 2015. * 
Filed as Exhibit 10.2 on the Company’s Form 10-12G filed on July 28, 2016.

Future Advance Promissory Note to Fortress Biotech, Inc., dated May 5, 2016. * 
Filed as Exhibit 10.3 on the Company’s Form 10-12G filed on July 28, 2016.

Promissory Note to NSC Biotech Venture Fund I, LLC, dated July 5, 2016. * 
Filed as Exhibit 10.4 on the Company’s Form 10-12G filed on July 28, 2016.

Common Stock Warrant issued by Mustang Bio, Inc. to NSC Biotech Venture Fund I, LLC, dated July 5, 2016. * 
Filed as Exhibit 10.5 on the Company’s Form 10-12G filed on July 28, 2016.

License Agreement by and between Mustang Bio, Inc. and City of Hope, dated March 17, 2015. #
Filed as Exhibit 10.6 on the Company’s Form 10-12G filed on July 28, 2016.

Sponsored Research Agreement by and between Mustang Bio, Inc. and City of Hope, dated March 17, 2015. *
Filed as Exhibit 10.7 on the Company’s Form 10-12G filed on July 28, 2016.

Mustang Bio, Inc. 2016 Incentive Plan. †* 
Filed as Exhibit 10.8 on the Company’s Form 10-12G filed on July 28, 2016.

Non-Employee Directors Compensation Plan. †* 
Filed as Exhibit 10.9 on the Company’s Form 10-12G filed on July 28, 2016.

Agreement with Chord Advisors, LLC, dated April 8, 2016. * 
Filed as Exhibit 10.10 on the Company’s Form 10-12G filed on July 28, 2016.

Agreement with Caribe BioAdvisors, LLC, dated January 1, 2017. 
Filed as Exhibit 10.11 on the Company’s Form 10-K filed on March 31, 2017.

Exclusive License Agreement with The Regents of the University of California, dated March 17, 2017. # 
Filed as Exhibit 10.4 on the Company’s Form 10-Q filed on August 14, 2017.

10.13

  Exclusive License Agreement - IV/ICV with City of Hope, dated February 17, 2017. # 

Filed as Exhibit 10.5 on the Company’s Form 10-Q filed on August 14, 2017.

10.14

  Amended and Restated Exclusive License Agreement - CD123 with City of Hope, dated February 17, 2017. #

Filed as Exhibit 10.14 on the Company’s Form 10-K filed on March 31, 2017.

10.15

  Amended and Restated Exclusive License Agreement - IL13Ra2 with City of Hope, dated February 17, 2017. #

Filed as Exhibit 10.15 on the Company’s Form 10-K filed on March 31, 2017.

10.16

  Amended and Restated Exclusive License Agreement - Spacer with City of Hope, dated February 17, 2017. #

Filed as Exhibit 10.16 on the Company’s Form 10-K filed on March 31, 2017.

10.17

  Employment Agreement between Manuel Litchman and Mustang Bio, Inc., made effective as of April 24, 2017

Filed as Exhibit 10.1 on the Company’s Form 8-K filed on April 24, 2017.

10.18

  License Agreement dated May 31, 2017 by and between Mustang Bio, Inc. and City of Hope (CSI). #

Filed as Exhibit 10.1 on the Company’s Form 10-Q/A filed on November 14, 2017.

10.19

  License Agreement dated May 31, 2017 by and between Mustang Bio, Inc. and City of Hope (PSCA). # 

Filed as Exhibit 10.2 on the Company’s Form 10-Q/A filed on November 14, 2017.

58

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
10.20

  License Agreement dated May 31, 2017 by and between Mustang Bio, Inc. and City of Hope (HER2). # 

Filed as Exhibit 10.3 on the Company’s Form 10-Q/A filed on November 14, 2017.

10.21

  Lease Agreement, by and between the Company and WCS - 377 Plantation Street, Inc., dated October 27, 2017.

Filed as Exhibit 10.1 on the Company’s Form 10-Q filed on November 14, 2017.

10.22

  Venture Loan and Security Agreement, dated March 29, 2019, by and between the Company and Horizon Technology Finance Corporation. *

Filed as Exhibit 10.1 on the Company’s Form 8-K filed on April 4, 2019.

  Consent of Independent Registered Public Accounting Firm, BDO USA, LLP

  Power of Attorney (included on signature page).

  Certification of President and Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

  Certification of Principal Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Certification of President and Chief Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.

  Certification of Principal Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

The following financial information from Mustang Bio, Inc.’s Annual Report on Form 10-K for the year ended December 31,  2019, formatted in Extensible
Business  Reporting  Language  (XBRL):  (i)  the  Balance  Sheets,  (ii)  the  Statements  of  Operations, (iii)  the  Statement  of  Stockholders’  Equity,  (iv)  the
Statements of Cash Flows, and (v) Notes to the Financial Statements (filed herewith).

Confidential treatment has been granted with respect to omitted portions of this exhibit.

Indicates management contract or compensatory plan or arrangement.

Previously Filed.

23.1

24.1

31.1

31.2

32.1

32.2

101

#

†

*

** Filed herewith.

 Item 16.

Form 10-K Summary.

None.

59

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INDEX TO FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm

Balance Sheets as of December 31, 2019 and 2018

Statements of Operations for the Years Ended December 31, 2019 and 2018

Statements of Changes in Stockholders’ Equity for the Years Ended December 31, 2019 and 2018

Statements of Cash Flows for the Years Ended December 31, 2019 and 2018

Notes to Financial Statements

F-1

F-2

F-3

F-4

F-5

F-6

F-7 - F-24

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Report of Independent Registered Public Accounting Firm 

Shareholders and Board of Directors
Mustang Bio, Inc.
New York, New York

Opinion on the Financial Statements

We  have  audited  the  accompanying  balance  sheets  of  Mustang  Bio,  Inc.  (the  “Company”)  as  of  December  31,  2019  and  2018,  the  related  statements  of  operations,
stockholders’  equity,  and  cash  flows  for  each  of  the  two  years  in  the  period  ended  December  31,  2019,  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 and subsidiaries at December 31, 2019 and
2018,  and  the  results  of  their  operations  and  their  cash  flows  for  each  of  the  two  years  in  the  period  ended  December  31,  2019,  in  conformity  with  accounting  principles
generally accepted in the United States of America.

Change in Accounting Principle

As discussed in Note 2 to the financial statements, on January 1, 2019, the Company changed its method of accounting for leases due to the adoption of ASU 2016-02, Leases
(ASC 842).

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. The Company is not required to have, nor were we engaged to perform, an
audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the
purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion. 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/ BDO USA, LLP

We have served as the Company's auditor since 2016.

Boston, Massachusetts
March 16, 2020

F-2

 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 MUSTANG BIO, INC.
BALANCE SHEETS
($ in thousands, except for share and per share amounts)

ASSETS
Current Assets:

Cash and cash equivalents
Short-term investments (certificates of deposit)
Other receivables - related party
Prepaid expenses and other current assets

Total current assets

Property, plant and equipment, net
Fixed assets - construction in process
Restricted cash
Other assets
Operating lease right-of-use asset, net
Total Assets

LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:

Short-term notes payable
Accounts payable and accrued expenses
Payables and accrued expenses - related party
Operating lease liabilities - short-term

Total current liabilities

Deferred rent payable
Notes payable
Operating lease liabilities - long-term
Total Liabilities

Commitments and Contingencies

Stockholders' Equity
Preferred stock ($0.0001 par value), 2,000,000 shares authorized, 250,000 shares of Class A preferred stock issued and outstanding
as of December 31, 2019 and 2018, respectively
Common Stock ($0.0001 par value), 85,000,000 shares authorized

Class A common shares, 845,385 and 1,000,000 shares issued and outstanding as of December 31, 2019 and 2018, respectively
Common shares, 39,403,519 and 26,610,183 shares issued and outstanding as of December 31, 2019 and 2018, respectively
Common stock issuable, 1,206,667 and 709,314 shares as of December 31, 2019 and 2018, respectively

Additional paid-in capital
Accumulated deficit
Total Stockholders’ Equity
Total Liabilities and Stockholders’ Equity

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

F-3

December 31,
2019

    December 31,

2018

  $

  $

  $

  $

61,413    $
-     
19     
1,631     
63,063     

6,779     
1,157     
1,000     
250     
1,196     
73,445    $

1,250    $
5,668     
596     
257     
7,771     

-     
12,179     
1,843     
21,793     

16,469 
17,604 
- 
1,052 
35,125 

6,465 
393 
500 
271 
- 
42,754 

- 
5,381 
236 
- 
5,617 

741 
- 
- 
6,358 

-     

- 

-     
4     
4,923     
172,184     
(125,459)    
51,652     
73,445    $

- 
3 
2,085 
113,378 
(79,070)
36,396 
42,754 

 
 
 
 
 
 
 
 
   
 
 
 
      
  
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
      
  
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
      
  
 
 
 
      
  
 
 
      
  
 
 
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 MUSTANG BIO, INC.
STATEMENTS OF OPERATIONS
($ in thousands, except for share and per share amounts)

Operating expenses:

Research and development
Research and development – licenses acquired
General and administrative

Total operating expenses
Loss from operations

Other income (expense)

Interest income
Interest expense

Total other income (expense)
Net Loss

Net loss per common share outstanding, basic and diluted

Weighted average number of common shares outstanding, basic and diluted

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

F-4

For the year ended December 31,

2019

2018

  $

  $

  $

30,042    $
6,273     
9,570     
45,885     
(45,885)    

1,263     
(1,767)    
(504)    
(46,389)   $

21,104 
3,360 
6,759 
31,223 
(31,223)

569 
(8)
561 
(30,662)

(1.29)   $

(1.14)

36,061,811     

26,949,374 

 
 
 
 
 
 
 
 
   
 
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
      
  
 
 
 
 
 
 
 
 
 
      
  
 
 
 
      
  
 
 
 
 
 
 
MUSTANG BIO, INC.
 STATEMENTS OF STOCKHOLDERS' EQUITY
($ in thousands, except share amounts)

Class A Preferred Stock
Amount

Shares

Balances at December 31, 2017
Common stock issuable - Founders Agreement
Issuance of common shares - Founders Agreement
Stock-based compensation expenses
Exercise of warrants
Net loss
Balances at December 31, 2018
Common stock issuable - Founders Agreement
Issuance of common shares - Founders Agreement
Issuance of common shares - Equity fee on Horizon Notes to
Fortress Biotech
Issuance of warrants - Horizon Notes
Conversion of Class A common shares to common shares
Issuance of common shares, net of offering costs - At-the-Market
Offering
Issuance of common shares - Equity fee on At-the-Market Offering 
Issuance of common shares, net of offering costs - Public Offering  
Issuance of common shares - Equity fee on Public Offering
Stock-based compensation expenses
Exercise of warrants
Net loss
Balances at December 31, 2019

  $

  $

250,000 
- 
- 
- 
- 
- 
250,000 
- 
- 

- 
- 
- 

- 
- 
- 
- 
- 
- 
- 
250,000 

  $

- 
- 
- 
- 
- 
- 
- 
- 
- 

- 
- 
- 

- 
- 
- 
- 
- 
- 
- 
- 

  $

Class A Common Shares
Shares
Amount
1,000,000 
- 
- 
- 
- 
- 
1,000,000 
- 
- 

  $

- 
- 
(154,615)

- 
- 
- 
- 
- 
- 
- 
845,385 

  $

Common Shares

Shares
  25,236,255 
- 
834,756 
496,552 
42,620 
- 
  26,610,183 
- 
709,314 

108,069 
- 
154,615 

3,506,222 
87,656 
7,906,250 
197,656 
30,341 
93,213 
- 
  39,403,519 

- 
- 
- 
- 
- 
- 
- 
- 
- 

- 
- 
- 

- 
- 
- 
- 
- 
- 
- 
- 

Amount

  $

  $

  $

Common
Stock
Issuable  
9,558 
2,085 
(9,558)
- 
- 
- 
2,085 
4,923 
(2,085)

  $

  $

- 
- 
- 

- 
- 
- 
- 
- 
- 
- 
4,923 

  $

3 
- 
- 
- 
- 
- 
3 
- 
- 

- 
- 
- 

- 
- 
1 
- 
- 
- 
- 
4 

Additional 
Paid-in  
Capital

  Accumulated  
Deficit

Total 
Stockholders' 
Equity

  $

  $

  $

98,679 
- 
9,558 
4,960 
181 
- 
113,378 
- 
2,085 

375 
888 
- 

21,972 
495 
29,536 
791 
2,664 
- 
- 
172,184 

  $

  $

  $

  $

  $

(48,408)
- 
- 
- 
- 
(30,662)
(79,070)
- 
- 

- 
- 
- 

- 
- 
- 
- 
- 
- 
(46,389)
(125,459)

  $

59,832 
2,085 
- 
4,960 
181 
(30,662)
36,396 
4,923 
- 

375 
888 
- 

21,972 
495 
29,537 
791 
2,664 
- 
(46,389)
51,652 

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

F-5

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
MUSTANG BIO, INC.
 STATEMENTS OF CASH FLOWS
($ in thousands)

For the year ended December 31,

2019

2018

Cash Flows from Operating Activities:
Net loss
Accretion of debt discount
Issuance of common shares - Equity fee on At-the-Market Offering to Fortress Biotech
Issuance of common shares - Equity fee on Public Offering to Fortress Biotech
Issuance of common shares - Equity fee on Horizon Notes to Fortress Biotech
Common shares issuable for Founders Agreement
Research and development - licenses acquired
Stock-based compensation expenses
Depreciation expense
Amortization of operating lease right-of-use assets
Adjustments to reconcile net loss to net cash used in operating activities:

Changes in operating assets and liabilities:
Prepaid expenses and other current assets
Interest receivables
Other receivables - related party
Accounts payable and accrued expenses
Payable and accrued expenses - related party
Deferred rent
Lease liabilities

Net cash used in operating activities

Cash Flows from Investing Activities:

Purchase of short-term investment (certificates of deposit)
Maturity of certificate of deposit
Purchase of research and development licenses
Purchase of fixed assets

Net cash provided by investing activities

Cash Flows from Financing Activities:

Proceeds from Horizon Notes
Debt issuance costs
Proceeds from exercise of warrants
Proceeds from issuance of common shares - At-the-Market Offering
Offering costs for the issuance of common shares - At-the-Market Offering
Proceeds from issuance of common shares - Public Offering
Offering costs for the issuance of common shares - Public Offering

Net cash provided by financing activities

Net change in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash, beginning of the period
Cash, cash equivalents and restricted cash, end of the period

Supplemental disclosure of cash flow information:
Cash paid for interest

Supplemental disclosure of noncash investing and financing activities:
Fixed assets (acquired but not paid)
Issuance of common shares - Founders Agreement
Research and development licenses included in accounts payable and accrued expenses
Issuance of warrants - Horizon Notes

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

F-6

  $

  $

  $

  $
  $
  $
  $

(46,389)   $
710     
495     
791     
375     
4,923     
1,350     
2,664     
1,258     
110     

(558)    
-     
(19)    
296     
360     
-     
53     
(33,581)    

-     
17,604     
(1,350)    
(2,345)    
13,909     

15,000     
(1,393)    
-     
22,515     
(543)    
31,625     
(2,088)    
65,116     

45,444     
16,969     
62,413    $

(30,662)
- 
- 
- 
- 
2,085 
1,275 
4,960 
630 
- 

(757)
(35)
- 
2,470 
99 
691 
- 
(19,244)

(52,500)
61,002 
(1,075)
(6,870)
557 

- 
- 
181 
- 
- 
- 
- 
181 

(18,506)
35,475 
16,969 

1,057    $

- 

187    $
2,085    $
-    $
888    $

196 
9,558 
200 
- 

 
 
 
 
 
 
 
 
   
 
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
 
 
 
 
 
      
  
 
 
      
  
 
 
 
      
  
 
 
      
  
 
 
 
 
 Note 1 - Organization and Description of Business

Mustang Bio, Inc. (the “Company” or “Mustang”) was incorporated in Delaware on March 13, 2015. Mustang is as a clinical-stage biopharmaceutical company focused on
translating  today’s  medical  breakthroughs  in  cell  and  gene  therapy  into  potential  cures  for  hematologic  cancers,  solid  tumors  and  rare  genetic  diseases.  The  Company  may
acquire  rights  to  these  technologies  by  licensing  the  rights  or  otherwise  acquiring  an  ownership  interest  in  the  technologies,  funding  their  research  and  development  and
eventually either out-licensing or bringing the technologies to market.

The Company is a majority-controlled subsidiary of Fortress Biotech, Inc. (“Fortress” or “Parent”).

Liquidity and Capital Resources

The Company has incurred substantial operating losses and expects to continue to incur significant operating losses for the foreseeable future and may never become profitable.
As of December 31, 2019, the Company had an accumulated deficit of $125.5 million.

The Company has funded its operations to date primarily through the sale of equity and its venture debt financing agreement (the “Loan Agreement”) with Horizon Technology
Finance  Corporation  (“Horizon”),  herein  referred  to  as  the  “Horizon  Notes.”  The  Company  expects  to  continue  to  use  the  proceeds  from  previous  financing  transactions
primarily  for  general  corporate  purposes,  including  financing  the  Company’s  growth,  developing  new  or  existing  product  candidates,  and  funding  capital  expenditures,
acquisitions  and  investments.  The  Company  currently  anticipates  that  its  cash  and  cash  equivalents  balances  at  December  31,  2019,  are  sufficient  to  fund  its  anticipated
operating cash requirements for at least one year from the date of this Form 10-K.

The  Company  will  be  required  to  expend  significant  funds  in  order  to  advance  the  development  of  its  product  candidates.  The  Company  will  require  additional  financings
through  equity  and  debt  offerings,  collaborations  and  licensing  arrangements  or  other  sources  to  fully  develop,  prepare  regulatory  filings,  obtain  regulatory  approvals  and
commercialize its existing and any new product candidates.

Note 2 - Significant Accounting Policies 

Basis of Presentation

The Company’s financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The Company
has no subsidiaries.

All  inter-company  transactions  between  Fortress  and  Mustang  are  classified  as  due  from  or  due  to  related  party  in  the  financial  statements.  The  Company  believes  that  the
assumptions underlying the financial statements are reasonable.

Segments

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 views its operations and manages its business in one operating and
reporting segment.

Use of Estimates

The  preparation  of  financial  statements  in  conformity  with  GAAP  requires  management  to  make  estimates  and  assumptions  that  affect  the  reported  amounts  of  assets  and
liabilities  and  disclosure  of  contingent  assets  and  liabilities  at  the  date  of  the  financial  statements  and  the  reported  amounts  of  expenses  during  the  reporting  period. Actual
results could differ from those estimates.

Cash and Cash Equivalents

The  Company  considers  all  short-term  investments  with  an  original  maturity  of  three  months  or  less  when  purchased  to  be  cash  equivalents.  Cash  and  cash  equivalents  at
December  31,  2019  and  2018,  consisted  of  cash,  money  market  funds  and  certificates  of  deposit  in  institutions  in  the  United  States.  Balances  at  certain  institutions  have
exceeded Federal Deposit Insurance Corporation (“FDIC”) insured limits.

F-7

 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
Other Receivables – Related Party

Other receivables includes amounts due to the Company from Fortress and Journey Medical Corporation, both related parties, and is recorded at the invoiced amount.

Restricted Cash

The Company records cash held in an escrow account as a security deposit for the manufacturing facility in Worcester, Massachusetts, as restricted cash. The Company had
$1.0 million and $0.5 million in restricted cash as of December 31, 2019 and 2018, respectively. The Facility initiated cell processing operations for personalized CAR T and
gene therapies in late 2018. 

Short-term Investments

The  Company  classifies  its  certificates  of  deposit  as  cash  and  cash  equivalents  or  held  to  maturity  in  accordance  with  the  Financial Accounting  Standards  Board  ("FASB")
Accounting Standards Codification (“ASC”) 320, Investments - Debt and Equity Securities. The Company considers all investments with an original maturity in excess of three
months when purchased to be short-term investments. Investments consist of short-term FDIC insured certificates of deposit carried at amortized cost using the effective interest
method. The cost of the Company’s certificates of deposit approximated fair value. The Company reassesses the appropriateness of the classification of its investments at the
end of each reporting period.

At December 31, 2019, the Company did not have any certificates of deposit. At December 31, 2018, the Company had approximately $27.6 million in certificates of deposit.
The Company classified $10.0 million as cash and cash equivalents and classified $17.6 million of its certificates of deposits as short-term investments as of December 31,
2018. The $17.6 million of certificates of deposits matured in 2019. The classification was based upon management’s determination that it has the positive intent and ability to
hold the securities until their maturity dates, as its investments mature within one year and the underlying cash invested in these securities is not required for current operations.

Property, plant and equipment, net

Property and equipment, net, which consists mainly of laboratory equipment, are carried at cost less accumulated depreciation. Depreciation is computed over the estimated
useful lives of the respective assets, generally five years, using the straight-line method.

Property and equipment - Construction in Process

In  connection  with  the  Company’s  cell  processing  facility,  the  Company  incurred  costs  for  the  design  and  construction  of  the  facility  and  the  purchase  of  equipment;  $1.2
million  and  $0.4  million  are  recorded  in  fixed  assets  –  construction  in  process  on  the  balance  sheet  at  December  31,  2019  and  2018,  respectively.  Upon  completion  of  the
facility’s construction, all costs associated with the buildout will be recorded as leasehold improvements and amortized over the shorter of the estimated useful lives or the term
of the respective leases, upon the improvement being placed in service.

Research and Development Costs

Research  and  development  costs  are  expensed  as  incurred. Advance  payments  for  goods  and  services  that  will  be  used  in  future  research  and  development  activities  are
expensed when the activity has been performed or when the goods have been received rather than when the payment is made. Upfront and milestone payments due to third
parties that perform research and development services on the Company’s behalf will be expensed as services are rendered or when the milestone is achieved.

Research  and  development  costs  primarily  consist  of  personnel  related  expenses,  including  salaries,  benefits,  travel,  and  other  related  expenses,  stock-based  compensation,
payments made to third parties for license and milestone costs related to in-licensed products and technology, payments made to third party contract research organizations for
preclinical and clinical studies, investigative sites for clinical trials, consultants, the cost of acquiring and manufacturing clinical trial materials, costs associated with regulatory
filings, laboratory costs and other supplies.

In  accordance  with ASC  730-10-25-1, Research  and  Development,  costs  incurred  in  obtaining  technology  licenses  are  charged  to  research  and  development  expense  if  the
technology licensed has not reached commercial feasibility and has no alternative future use. The licenses purchased by the Company require substantial completion of research
and  development,  regulatory  and  marketing  approval  efforts  to  reach  commercial  feasibility  and  has  no  alternative  future  use. Accordingly,  the  total  purchase  price  for  the
licenses acquired is reflected as research and development - licenses acquired on the Company’s Statements of Operations.

Annual Stock Dividend

In July 2016, in connection with the Amended and Restated Articles of Incorporation, the Company issued 250,000 Class A preferred shares to Fortress. The Class A preferred
shares entitle the holder to a stock dividend equal to 2.5% of the fully diluted outstanding equity of the Company (“The Annual Stock Dividend”). The Annual Stock Dividend
was part of the consideration payable for formation of the Company and the identification of certain assets, including the license contributed to Mustang by Fortress (see Note
4).

F-8

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
In 2017, the Company recorded the Annual Stock Dividend due to Fortress as contingent consideration. Contingent consideration is recorded when probable and reasonably
estimable.  The  Company’s  future  share  prices  cannot  be  estimated  due  to  the  nature  of  its  assets  and  the  Company’s  stage  of  development.  Due  to  these  uncertainties,  the
Company concluded that it could not reasonably estimate the contingent consideration until shares were actually issued on March 13, 2018. Because the issuance of shares on
March 13, 2018, occurred prior to the issuance of the December 31, 2017, financial statements, the Company recorded approximately $9.6 million in research and development
- licenses acquired for the year ended December 31, 2017.

In June 2018, in connection with the Amended and Restated Articles of Incorporation, the Company amended the annual stock dividend due date from March 13th to January
1st.

Pursuant to the Amended and Restated Articles of Incorporation, the Company issued 709,314 shares of common stock to Fortress for the Annual Stock Dividend, representing
2.0%, on a pro rata basis, of the fully-diluted outstanding equity of Mustang on January 1, 2019. This was shown in the Statement of Stockholders’ Equity at December 31,
2018, as Common stock issuable – Founders Agreement. The Company recorded an expense of approximately $2.1 million in research and development - licenses acquired
related to these issuable shares during the year ended December 31, 2018.

Pursuant  to  the  Amended  and  Restated  Articles  of  Incorporation,  the  Company  issued  1,206,667  shares  of  common  stock  to  Fortress  for  the  Annual  Stock  Dividend,
representing 2.5% of the fully-diluted outstanding equity of Mustang on January 1, 2020. This was shown in the Statement of Stockholders’ Equity at December 31, 2019 as
Common stock issuable – Founders Agreement. The Company recorded an expense of approximately $4.9 million in research and development - licenses acquired related to
these issuable shares during the year ended December 31, 2019.

Fair Value Measurement

The Company follows accounting guidance on fair value measurements for financial assets and liabilities measured at fair value on a recurring basis. Under the accounting
guidance, fair value is defined as an exit price, representing the amount 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. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would
use in pricing an asset or a liability.

The accounting guidance requires fair value measurements be classified and disclosed in one of the following three categories:

Level 1:

Quoted prices in active markets for identical assets or liabilities.

Level 2:

Observable inputs other than Level 1 prices, for similar assets or liabilities that are directly or indirectly observable in the marketplace.

Level 3:

Unobservable inputs which are supported by little or no market activity and that are financial instruments whose values are determined using pricing models,
discounted  cash  flow  methodologies,  or  similar  techniques,  as  well  as  instruments  for  which  the  determination of  fair  value  requires  significant  judgment  or
estimation.

The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Assets and
liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of
the significance of a particular input to the fair value measurement in its entirety requires management to make judgments and consider factors specific to the asset or liability.

Leases

Effective January 1, 2019, the Company accounts for its leases under ASC 842, Leases.  Under this guidance, arrangements meeting the definition of a lease are classified as
operating or financing leases and are recorded on the balance sheet as both a right of use asset and lease liability, calculated by discounting fixed lease payments over the lease
term at the rate implicit in the lease or the Company’s incremental borrowing rate.  Lease liabilities are increased by interest and reduced by payments each period, and the right
of use asset is amortized over the lease term.  For operating leases, interest on the lease liability and the amortization of the right of use asset result in straight-line rent expense
over the lease term.  Variable lease expenses are recorded when incurred. In calculating the right of use asset and lease liability, the Company elects to combine lease and non-
lease components.  The Company excludes short-term leases having initial terms of 12 months or less from the new guidance as an accounting policy election and recognizes
rent expense on a straight-line basis over the lease term.

The Company continues to account for leases in the prior period financial statements under ASC Topic 840.

F-9

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stock-Based Compensation

The Company expenses stock-based compensation to employees over the requisite service period based on the estimated grant-date fair value of the awards and forfeiture rates.

For  stock-based  compensation  awards  to  non-employees,  prior  to  the  adoption  of ASU  2018-07  on  January  1,  2019,  the  Company  remeasured  the  fair  value  of  the  non-
employee awards at each reporting period prior to vesting and finally at the vesting date of the award. Changes in the estimated fair value of these non-employee awards were
recognized as compensation expense in the period of change. Subsequent to the adoption of ASU 2018-07, the Company recognizes non-employee compensation costs over the
requisite service period based on a measurement of fair value for each stock award.

The  Company  estimates  the  fair  value  of  stock  option  grants  using  the  Black-Scholes  option  pricing  model  or  409a  valuations,  as  applicable.  The  assumptions  used  in
calculating the fair value of stock-based awards represent management’s best estimates and involve inherent uncertainties and the application of management’s judgment.

Income Taxes

The  Company  records  income  taxes  using  the  asset  and  liability  method.  Deferred  income  tax  assets  and  liabilities  are  recognized  for  the  future  tax  effects  attributable  to
temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective income tax bases, and operating loss and tax credit
carryforwards. The Company establishes a valuation allowance if management believes it is more likely than not that the deferred tax assets will not be recovered based on an
evaluation of objective verifiable evidence. For tax positions that are more likely than not of being sustained upon audit, the Company recognizes the largest amount of the
benefit that is greater than 50% likely of being realized. For tax positions that are not more likely than not of being sustained upon audit, the Company does not recognize any
portion of the benefit.

Net Loss per Share

Net  loss  per  share  is  computed  by  dividing  net  loss  by  the  weighted  average  number  of  common  shares  outstanding  during  the  period  less  unvested  restricted  stock.  Since
dividends are declared, paid and set aside among the holders of shares of common stock and Class A common shares pro-rata on an as-if-converted basis, the two-class method
of computing net loss per share is not required. Diluted net loss per share does not reflect the effect of shares of common stock to be issued upon the exercise of warrants or
outstanding Class A preferred shares, as their inclusion would be anti-dilutive.

The table below summarizes potentially dilutive securities that were not considered in the computation of diluted net loss per share because they would be anti-dilutive.

Warrants
Options
Class A Preferred Shares
Unvested restricted stock awards
Unvested restricted stock units
Total

Comprehensive Loss

For the year ended December 31,

2019

2018

5,405,669     
1,241,675     
250,000     
299,060     
1,112,417     
8,308,821     

5,210,698 
1,241,675 
250,000 
502,636 
1,032,084 
8,237,093 

The Company has no components of other comprehensive loss, and therefore, comprehensive loss equals net loss. 

Recently Adopted Accounting Pronouncements

In June 2018, the FASB issued ASU 2018-07, “Improvements to Nonemployee Share-Based Payment Accounting”, which simplifies the accounting for share-based payments
granted to nonemployees for goods and services. Under the ASU, most of the guidance on such payments to nonemployees would be aligned with the requirements for share-
based payments granted to employees. The changes take effect for public companies for fiscal years starting after December 15, 2018, including interim periods within that
fiscal  year.  For  all  other  entities,  the  amendments  are  effective  for  fiscal  years  beginning  after  December  15,  2019,  and  interim  periods  within  fiscal  years  beginning  after
December 15, 2020. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. The Company adopted ASU No. 2018-07 as of January 1, 2019. The
adoption of this update did not have a material impact on the Company’s financial statements.

F-10

 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
   
 
   
   
   
   
   
   
 
 
 
 
 
 
 
In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480) and Derivatives and Hedging (Topic 815): I.
Accounting for Certain Financial Instruments with Down Round Features; II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of
Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception. Part I of this update addresses the complexity of accounting
for certain financial instruments with down round features. Down round features are features of certain equity-linked instruments (or embedded features) that result in the strike
price being reduced on the basis of the pricing of future equity offerings. Current accounting guidance creates cost and complexity for entities that issue financial instruments
(such as warrants and convertible instruments) with down round features that require fair value measurement of the entire instrument or conversion option. Part II of this update
addresses  the  difficulty  of  navigating  Topic  480,  Distinguishing  Liabilities  from  Equity,  because  of  the  existence  of  extensive  pending  content  in  the  FASB Accounting
Standards Codification. This pending content is the result of the indefinite deferral of accounting requirements about mandatorily redeemable financial instruments of certain
nonpublic  entities  and  certain  mandatorily  redeemable  noncontrolling  interests.  The  amendments  in  Part  II  of  this  update  do  not  have  an  accounting  effect.  This ASU  is
effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The adoption of this ASU on January 1, 2019, did not have a material
impact on the Company’s financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) in order to increase transparency and comparability among organizations by, among other provisions,
recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under previous GAAP. For public companies, ASU 2016-02 is
effective for fiscal years beginning after December 15, 2018 (including interim periods within those periods), using a modified retrospective approach and early adoption is
permitted.  In transition, entities may also elect a package of practical expedients that must be applied in its entirety to all leases commencing before the adoption date, unless
the lease is modified, and permits entities to not reassess (a) the existence of a lease, (b) lease classification or (c) determination of initial direct costs, as of the adoption date,
which  effectively  allows  entities  to  carry  forward  accounting  conclusions  under  previous  U.S.  GAAP.      In  July  2018,  the  FASB  issued ASU  2018-11,  Leases  (Topic  842):
Targeted  Improvements,  which  provides  entities  an  optional  transition  method  to  apply  the  guidance  under  Topic  842  as  of  the  adoption  date,  rather  than  as  of  the  earliest
period presented.  The Company adopted Topic 842 on January 1, 2019, using the optional transition method to apply the new guidance as of January 1, 2019, rather than as of
the earliest period presented, and elected the package of practical expedients described above. Based on the analysis, on January 1, 2019, the Company recorded right of use
assets of approximately $1.2 million, lease liability of approximately $2.0 million and eliminated deferred rent of approximately $0.7 million.

In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. ASU 2017-09 provides clarity and reduces
both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, to a change to the terms or conditions of a share-based payment award. The
amendments in ASU 2017-09 should be applied prospectively to an award modified on or after the adoption date. This ASU is effective for fiscal years, and interim periods
within  those  years,  beginning  after  December  15,  2017.  The  Company  adopted ASU  No.  2017-09  as  of  January  1,  2018.  The  adoption  of  this  update  did  not  impact  the
Company’s financial statements and related disclosures.

In  January  2017,  the  FASB issued A S U 2017-01,  “Business  Combinations  (Topic  805)  Clarifying  the  Definition  of  a  Business”.  The  amendments  in  this  ASU  clarify
the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of
assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The guidance is effective for
annual periods beginning after December 15, 2017, including interim periods within those periods. The Company adopted ASU 2017-01 on January 1, 2018. The adoption of
this update did not impact the Company’s financial statements.

In June 2018, the FASB issued ASU 2018-07, “Improvements to Nonemployee Share-Based Payment Accounting”, which simplifies the accounting for share-based payments
granted to nonemployees for goods and services. Under the ASU, most of the guidance on such payments to nonemployees would be aligned with the requirements for share-
based payments granted to employees. The changes take effect for public companies for fiscal years starting after December 15, 2018, including interim periods within that
fiscal  year.  For  all  other  entities,  the  amendments  are  effective  for  fiscal  years  beginning  after  December  15,  2019,  and  interim  periods  within  fiscal  years  beginning  after
December 15, 2020. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. The Company adopted ASU No. 2018-07 as of January 1, 2019. The
adoption of this update did not have a material impact on the Company’s financial statements.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses”. The ASU sets forth a “current expected credit loss” (CECL) model which requires the
Company to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions, and reasonable supportable
forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some
off-balance sheet credit exposures. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, with early
adoption permitted. Recently, the FASB issued the final ASU to delay adoption for smaller reporting companies to calendar year 2023. The Company is currently assessing the
impact of the adoption of this ASU on its financial statements.

F-11

 
 
 
 
 
   
  
 
 
 
 
In August  2018,  the  FASB  issued ASU  2018-13, Fair  Value  Measurement  (Topic  820),  -  Disclosure  Framework  -  Changes  to  the  Disclosure  Requirements  for  Fair  Value
Measurement,  which  makes  a  number  of  changes  meant  to  add,  modify  or  remove  certain  disclosure  requirements  associated  with  the  movement  amongst  or  hierarchy
associated with Level 1, Level 2 and Level 3 fair value measurements. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after
December  15,  2019.  Early  adoption  is  permitted  upon  issuance  of  the  update.  The  Company  does  not  expect  the  adoption  of  this  guidance  to  have  a  material  impact  on  its
financial statements.

In  December  2019,  the  FASB  issued ASU  2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,  which  is  intended  to  simplify  various  aspects
related to accounting for income taxes. The ASU removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve
consistent  application.  This  guidance  is  effective  for  fiscal  years,  and  interim  periods  within  those  fiscal  years,  beginning  after  December  15,  2020,  with  early  adoption
permitted. The Company is currently evaluating the impact of this standard on its financial statements and related disclosures.

Note 3 - License, Clinical Trial and Sponsored Research Agreements

Research and Development Expenses – All Licenses

For the years ended December 31, 2019 and 2018, the Company recorded the following expense in research and development for licenses acquired:

($ in thousands)
City of Hope
CD123
CS1
PSCA
HER2
Manufacturing

CSL Behring (Calimmune)
UCLA
St. Jude – XSCID
Nationwide Children's Hospital - C134
Fortress PIK Dividend
Total

License Agreements

City of Hope

CD123 License (MB-102)

  For the year ended December 31,  

2019

2018

  $

  $

250    $
200     
200     
-     
-     
200     
300     
-     
200     
4,923     
6,273    $

- 
- 
- 
200 
75 
- 
- 
1,000 
- 
2,085 
3,360 

In  February  2017,  the  Company  entered  into  an Amended  and  Restated  Exclusive  License Agreement  with  the  City  of  Hope  National  Medical  Center  (“COH”)  to  acquire
intellectual property rights pertaining to CD123-specific chimeric antigen receptor (“CAR”) engineered T cell (“CAR T”) technology. Pursuant to this agreement, the Company
and COH acknowledged that an upfront fee was previously paid. In addition, COH is eligible to receive an annual maintenance fee of $25,000 and milestone payments totaling
$14.5 million upon the achievement of certain milestones. Royalty payments in the mid-single digits are due on net sales of licensed products.

For the year ended December 31, 2019, the Company expensed a non-refundable milestone payment of $0.3 million upon the twelfth patient dosed in a Phase 1 clinical study
of CD123. There was no expense recorded for the year ended December 31, 2018.

CS1 License (MB-104) 

In May 2017, the Company entered into an exclusive license agreement with the COH for the use of CS1-specific CAR T technology. Pursuant to this agreement, the Company
paid an upfront fee of $0.6 million and pays an annual maintenance fee of $50,000. Additional payments are due for the achievement of ten development milestones totaling
$14.9 million, and royalty payments in the mid-single digits are due on net sales of licensed products.

For the year ended December 31, 2019, the Company expensed a non-refundable milestone payment of $0.2 million upon the first patient dosed in a Phase 1 clinical study of
CS1. There was no expense recorded for the year ended December 31, 2018.

F-12

 
 
 
 
 
 
 
 
 
   
 
   
      
  
   
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
PSCA License (MB-105) 

In May 2017, the Company entered into an exclusive license agreement with COH for the use of prostate stem cell antigen (“PSCA”) CAR T technology to be used in the
treatment  of  prostate  cancer,  pancreatic  cancer  and  other  solid  tumors.  Pursuant  to  this  agreement,  the  Company  paid  an  upfront  fee  of  $0.3  million  and  pays  an  annual
maintenance fee of $50,000. Additional payments are due for the achievement of ten development milestones totaling $14.9 million, and royalty payments in the mid-single
digits are due on net sales of licensed products. 

For the year ended December 31, 2019, the Company expensed a non-refundable milestone payment of $0.2 million upon the first patient dosed in a Phase 1 clinical study of
PSCA. There was no expense recorded for the year ended December 31, 2018.

HER2 Technology License 

On May 31, 2017, the Company entered into an exclusive license agreement with the COH for the use of human epidermal growth factor receptor 2 (HER2) CAR T technology,
which will initially be applied in the treatment of glioblastoma multiforme. Pursuant to this agreement, the Company paid an upfront fee of $0.6 million and pays an annual
maintenance fee of $50,000. Additional payments are due for the achievement of ten development milestones totaling $14.9 million, and royalty payments in the mid-single
digits are due on net sales of licensed products.

For the years ended December 31, 2019 and 2018, respectively, the Company expensed a non-refundable milestone payment of nil and $0.2 million upon the first patient dosed
in a Phase 1 clinical study of HER2.

Manufacturing License

On  January  3,  2018,  the  Company  entered  into  a  non-exclusive  license  agreement  with  COH  to  acquire  patent  and  licensed  know-how  rights  related  to  developing,
manufacturing, and commercializing licensed products. The Company paid $75,000 in consideration for the licenses to the patent rights and the licensed know-how in addition
to an annual maintenance fee. Royalty payments in the low-single digits are due on net sales of licensed products.

CSL Behring (Calimmune)

On August 23, 2019, the Company entered into a non-exclusive license agreement with CSL Behring (Calimmune, Inc.) (“Calimmune License”) for the rights to the cell bank to
be used in the manufacture of the XSCID vector that was separately licensed from St. Jude Children’s Research Hospital, Inc. (“St. Jude”), in August 2018. Pursuant to the
terms  of  the  Calimmune  License,  the  Company  paid  an  upfront  fee  of  $0.2  million.  CSL  Behring  is  eligible  to  receive  additional  payments  totaling  $1.2  million  upon  the
achievement of three development and commercialization milestones. Royalty payments in the low-single digits are due on net sales of licensed products. Upon the execution of
the Calimmune License, the Company recorded research and development expense of $0.2 million in the Statements of Operations for the year ended December 31, 2019. No
payments were made in 2018.

University of California Los Angeles

On March 17, 2017, the Company entered into an exclusive license agreement with the Regents of the University of California at Los Angeles (“UCLA License”) to acquire
intellectual property rights in patent applications related to engineered anti-prostate stem cell antigen antibodies for cancer targeting and detection. In September 2019, COH
commenced  its  Phase  1  clinical  trial  resulting  in  the  achievement  of  a  development  milestone,  and  the  Company  recorded  an  expense  of  $0.3  million  in  the  Statements  of
Operations for the year ended December 31, 2019. No expense was recorded in 2018.

St. Jude Children’s Research Hospital

On August 2, 2018, the Company entered into an exclusive worldwide license agreement with St. Jude for the development of a first-in-class ex vivo lentiviral gene therapy for
the treatment of X-linked severe combined immunodeficiency (“XSCID”). The Company paid $1.0 million in consideration for the exclusive license in addition to an annual
maintenance  fee  of  $0.1  million  (beginning  in  2019).  St.  Jude  is  eligible  to  receive  payments  totaling  $13.5  million  upon  the  achievement  of  five  development  and
commercialization milestones. Royalty payments in the mid-single digits are due on net sales of licensed products.

For the years ended December 31, 2019 and 2018, respectively, the Company recorded an expense of nil and $1.0 million in connection with this license.

F-13

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nationwide Children’s Hospital

In  February  2019,  Mustang  announced  that  it  partnered  and  entered  into  an  exclusive  worldwide  license  agreement  with  Nationwide  Children’s  Hospital  (“Nationwide”)  to
develop their C134 oncolytic virus (MB-108) for the treatment of glioblastoma multiforme (“GBM”). Mustang intends to combine MB-108 with MB-101 (IL13Rα2-specific
CAR  T)  to  potentially  enhance  efficacy  in  treating  GBM.  The  Company  paid  $0.2  million  in  consideration  for  the  license  to  exclusive,  worldwide  rights  to  develop  and
commercialize products that incorporate data, know-how and/or MB-108 that were developed at Nationwide. Additional payments are due to Nationwide upon achievement of
development and commercialization milestones totaling $152.8 million. Royalty payments in the low-single digits are due on net sales of licensed products.

For the years ended December 31, 2019 and 2018, respectively, the Company recorded an expense of $0.2 million and nil in connection with this license.

Research and Development Expenses - Sponsored Research and Clinical Trial Agreements 

For  the  year  ended  December  31,  2019  and  2018,  the  Company  recorded  the  following  expense  in  research  and  development  for  sponsored  research  and  clinical  trial
agreements:

($ in thousands)
City of Hope
City of Hope - CD123
City of Hope - IL13Rα2
City of Hope - Manufacturing
Fred Hutch - CD20
St. Jude - XSCID
BIDMC - CRISPR
Total

City of Hope

  For the year ended December 31,  

2019

2018

  $

  $

2,000    $
1,202     
876     
457     
762     
777     
69     
6,143    $

2,000 
835 
1,056 
458 
1,301 
- 
69 
5,719 

In March 2015, the Company entered into a Sponsored Research Agreement (“SRA”) with COH in which the Company will fund continued research in the amount of $2.0
million  per  year,  payable  in  four  equal  installments,  through  the  first  quarter  of  2020.  The  research  covered  under  this  arrangement  is  for  IL13Rα2,  CD123  and  the  Spacer
technology. For the year ended December 31, 2019 and 2018, the Company recorded $2.0 million, respectively, in research and development expenses on the Statements of
Operations in connection with this agreement.

CD123 Clinical Research Support Agreement

In February 2017, the Company entered into a Clinical Research Support Agreement for CD123 (the “CD123 CRA”). Pursuant to the terms of the CD123 CRA the Company
made an upfront payment of $19,450 and will contribute an additional $97,490 per patient in connection with the on-going investigator-initiated study. Further, the Company
agreed to fund approximately $0.2 million over three years pertaining to the clinical development of CD123. For the year ended December 31, 2019 and 2018, the Company
recorded $1.2 million and $0.8 million, respectively, in research and development expenses under the CD123 CRA on the Statements of Operations.

IL13Rα2 Clinical Research Support Agreement 

In  February  2017,  the  Company  entered  into  a  Clinical  Research  Support Agreement  for  IL13Rα2  (the  “IL13Rα2  CRA”).  Pursuant  to  the  terms  of  the  IL13Rα2  CRA  the
Company made an upfront payment of approximately $9,300 and will contribute an additional $0.1 million related to patient costs in connection with the on-going investigator-
initiated  study.  Further,  the  Company  agreed  to  fund  approximately  $0.2  million  over  three  years  pertaining  to  the  clinical  development  of  IL13Rα2.  For  the  year  ended
December  31,  2019  and  2018,  the  Company  recorded  $0.9  million  and  $1.1  million,  respectively,  in  research  and  development  expenses  under  the  IL13Rα2  CRA  on  the
Statements of Operations.

Sponsored Research Agreement

On January 3, 2018, the Company entered into an SRA with COH to optimize and develop CAR T cell processing procedures. Pursuant to the SRA, the Company will fund
continued research in the amount of $0.9 million for the program, which has an initial term of two (2) years. For the year ended December 31, 2019 and 2018, the Company
recorded $0.5 million and $0.4 million, respectively, in research and development expenses under the COH - Manufacturing SRA on the Statements of Operations.

F-14

 
 
 
 
 
 
 
 
 
   
 
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
Fred Hutchinson Cancer Research Center

CD20 Clinical Trial Agreement 

On  July  3,  2017,  in  conjunction  with  the  CD20  Technology  License  from  Fred  Hutchinson  Cancer  Research  Center  (“Fred  Hutch”),  Mustang  entered  into  an  investigator-
initiated clinical trial agreement (“CD20 CTA”) to provide partial funding for a Phase 1/2 clinical trial at Fred Hutch evaluating the safety and efficacy of the CD20 Technology
in patients with relapsed or refractory B-cell non-Hodgkin lymphomas. In connection with the CD20 CTA, the Company agreed to fund up to $5.3 million of costs associated
with the clinical trial, which commenced during the fourth quarter of 2017. For the year ended December 31, 2019 and 2018, the Company recorded $0.6 million and $0.9
million, respectively, of expense in connection with this agreement. 

Sponsored Research Agreement

On March 17, 2018, the Company entered into an SRA with Fred Hutch related to developing and optimizing processes and systems associated with CD20 cell processing.
Pursuant to the SRA, the Company will fund continued research in the amount of $0.6 million during the term of the SRA, which expired in March 2019. For the year ended
December 31, 2019 and 2018, the Company recorded expense of approximately $0.2 million and $0.4 million, respectively, in connection with this agreement.

CRISPR Sponsored Research Agreement with Beth Israel Deaconess Medical Center, Inc.

On November 28, 2017, the Company entered into an SRA with Beth Israel Deaconess Medical Center Inc. (“BIDMC”) to perform research relating to gene editing, via the use
of CRISPR/Cas9, to be used in enhancing the efficacy of CAR T cell therapies for solid tumor indications and to generate universal off-the-shelf CAR T cell therapies for both
liquid and solid tumor indications. The Company agreed to fund approximately $0.8 million over a three-year period. For the year ended December 31, 2019 and 2018, the
Company recorded approximately $0.1 million and $0.1 million, respectively, of expense in connection with this agreement.

In December 2018, the Company terminated the SRA with BIDMC due to the departure of key personnel from BIDMC.

Services Agreement with Children’s CGMP, LLC 

In December 2019, the Company entered into a Non-Interventional Services Agreement with Children’s CGMP, LLC (“CGMP”), an affiliate of St. Jude Children’s Research
Hospital,  pursuant  to  which  CGMP  provides  lentiviral  vector  for  non-clinical  XSCID  (MB-107)  research  purposes,  as  well  as  related  advisory  services.  We  agreed  to  fund
approximately  $0.8  million  upon  execution  of  the  agreement,  which  was  recorded  in  research  and  development  expenses  for  the  year  ended  December  31,  2019,  in  the
Company’s Statements of Operations. 

Note 4 - Related Party Agreements

Founders Agreement and Management Services Agreement with Fortress

Effective  March  13,  2015,  the  Company  entered  a  Founders Agreement  with  Fortress,  which  was  amended  and  restated  on  May  17,  2016,  and  again  on  July  26,  2016  (the
“Mustang  Founders Agreement”).  The  Mustang  Founders Agreement  provides  that,  in  exchange  for  the  time  and  capital  expended  in  the  formation  of  Mustang  and  the
identification of specific assets the acquisition of which result in the formation of a viable emerging growth life science company, Fortress loaned $2.0 million, representing the
up-front fee required to acquire the Company’s license agreement with COH. The Mustang Founders Agreement has a term of 15 years, which upon expiration automatically
renews  for  successive  one-year  periods  unless  terminated  by  Fortress  and  the  Company  or  a  Change  in  Control  (as  defined  in  the  Mustang  Founders Agreement)  occurs.
Concurrently with the second amendment on July 26, 2016, to the Mustang Founders Agreement, Fortress entered into an Exchange Agreement whereby Fortress exchanged its
7.25 million Class B Common shares for 7.0 million common shares and 250,000 Class A Preferred shares. Class A Preferred Stock is identical to common stock other than as
to voting rights, conversion rights and the PIK Dividend right (as described below). Each share of Class A Preferred Stock will be entitled to vote the number of votes that is
equal  to  one  and  one-tenth  (1.1)  times  a  fraction,  the  numerator  of  which  is  the  sum  of  (A)  the  shares  of  outstanding  Mustang  common  stock  and  (B)  the  whole  shares  of
Mustang common stock into which the shares of outstanding Class A Common Stock and Class A Preferred Stock are convertible and the denominator of which is the number
of shares of outstanding Class A Preferred Stock. Thus, the Class A Preferred Stock will at all times constitute a voting majority. Each share of Class A Preferred Stock is
convertible, at Fortress’ option, into one fully paid and nonassessable share of Mustang common stock, subject to certain adjustments. As holders of Class A Preferred Stock,
Fortress  will  receive  on  each  January  1  (each  a  “PIK  Dividend  Payment  Date”)  until  the  date  all  outstanding  Class A  Preferred  Stock  is  converted  into  common  stock  or
redeemed (and the purchase price is paid in full), pro rata per share dividends paid in additional fully paid and nonassessable shares of common stock (“PIK Dividends”) such
that the aggregate number of shares of common stock issued pursuant to such PIK Dividend is equal to two and one-half percent (2.5%) of Mustang’s fully-diluted outstanding
capitalization on the date that is one (1) business day prior to any PIK Dividend Payment Date.

As additional consideration under the Mustang Founders Agreement, Mustang will also: (i) pay an equity fee in shares of common stock, payable within five (5) business days
of the closing of any equity or debt financing for Mustang that occurs after the effective date of the Mustang Founders Agreement and ending on the date when Fortress no
longer has majority voting control in the Company’s voting equity, equal to two and one-half (2.5%) of the gross amount of any such equity or debt financing; and (ii) pay a
cash fee equal to four and one-half percent (4.5%) of the Company’s annual net sales, payable on an annual basis, within ninety (90) days of the end of each calendar year. In the
event of a Change in Control, the Company will pay a one-time change in control fee equal to five (5x) times the product of (A) net sales for the twelve (12) months immediately
preceding the change in control and (B) four and one-half percent (4.5%) (see Note 9).

F-15

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Effective as of March 13, 2015, the Company entered into a Management Services Agreement (the “MSA”) with Fortress, pursuant to which Fortress renders advisory and
consulting services to the Company. The MSA has an initial term of five years and is automatically renewed for successive five-year terms unless terminated in accordance with
its provisions. Services provided under the MSA may include, without limitation, (i) advice and assistance concerning any and all aspects of the Company’s operations, clinical
trials, financial planning and strategic transactions and financings and (ii) conducting relations on behalf of the Company with accountants, attorneys, financial advisors and
other professionals (collectively, the “Services”). The Company is obligated to utilize clinical research services, medical education, communication and marketing services and
investor relations/public relation services of companies or individuals designated by Fortress, provided those services are offered at market prices. However, the Company is not
obligated  to  take  or  act  upon  any  advice  rendered  from  Fortress  and  Fortress  shall  not  be  liable  for  any  of  its  actions  or  inactions  based  upon  their  advice.  Fortress  and  its
affiliates, including all members of the Company’s Board of Directors, have been contractually exempt from fiduciary duties to the Company relating to corporate opportunities.
In consideration for the Services, the Company will pay Fortress an annual consulting fee of $0.5 million (the “Annual Consulting Fee”), payable in advance in equal quarterly
installments on the first business day of each calendar quarter in each year, provided, however, that such Annual Consulting Fee shall be increased to $1.0 million for each
calendar  year  in  which  the  Company  has  net  assets  in  excess  of  $100  million  at  the  beginning  of  the  calendar  year.  For  the  years  ended  December  31,  2019  and  2018,  the
Company recorded expense of $0.5 million and $0.5 million, respectively, related to this agreement. 

Under the terms of the Second Amended and Restated Founders Agreement, which became effective July 22, 2016, Fortress will receive a grant of shares of our common stock
equal to two and one-half percent (2.5%) of the gross amount of any equity or debt financing. In March 2019, the Company issued 108,069 shares of common stock to Fortress,
which equaled 2.5% of the gross funded amount of the Horizon Notes. The Company recorded an expense of approximately $0.4 million in general and administrative expenses
related to these shares during the year ended December 31, 2019.

In April 2019, the Company issued 87,656 shares of common stock to Fortress, which equaled 2.5% of the gross proceeds of $22.5 million from the sale of shares of common
stock under Mustang’s At-the-Market Offering. The Company recorded an expense of approximately $0.5 million in general and administrative expenses related to these shares
during the year ended December 31, 2019.

In May 2019, the Company issued 197,656 shares of common stock to Fortress, which equaled 2.5% of the gross proceeds of $31.6 million from the sale of shares of common
stock, before deducting underwriting discounts and commissions and offering expenses under Mustang’s Public Offering. The Company recorded an expense of approximately
$0.8 million in general and administrative expenses related to these shares during the year ended December 31, 2019.

Payables and Accrued Expenses Related Party

In the normal course of business Fortress pays for certain expenses on behalf of the Company. Such expenses are recorded as Payables and accrued expenses - related party and
are reimbursed to Fortress in the normal course of business.

Director Compensation

Dr. Rosenwald

Pursuant to the terms of the Director Compensation Plan, Dr. Rosenwald will receive a cash fee of $50,000 per year paid quarterly and an annual stock award of the greater of
(i) a number of shares of common stock having a fair market value on the grant date of $50,000 or (ii) 10,000 shares of common stock, which shares shall vest and become non-
forfeitable on the third anniversary of the grant date, subject to continued service on the Board on such date. For the year ended December 31, 2019, the Company recognized
$102,000  in  expense  in  its  Statements  of  Operations  related  to  the  director  compensation,  including  approximately  $52,000  in  expense  related  to  equity  incentive  grants  of
34,000  restricted  shares.  For  the  year  ended  December  31,  2018,  the  Company  recognized  $84,000  in  expense  in  its  Statements  of  Operations  related  to  the  director
compensation, including approximately $34,000 in expense related to equity incentive grant of 20,000 restricted shares.

Mr. Weiss - Advisory Agreement with Caribe BioAdvisors, LLC

The Board of the Company by unanimous written consent approved and authorized the execution of an advisory agreement dated January 1, 2017 (the “Advisory Agreement”),
with Caribe BioAdvisors, LLC (the “Advisor”), owned by Michael S. Weiss, the Chairman of the Board, to provide the board advisory services of Mr. Weiss as Chairman of the
Board. Pursuant to the Advisory Agreement, the Advisor will be paid an annual cash fee of $60,000, paid quarterly and an annual stock award of the greater of (i) a number of
shares of common stock having a fair market value on the grant date of $50,000 or (ii) 10,000 shares of common stock, which shares shall vest and become non-forfeitable on
the third anniversary of the grant date, subject to continued service on the Board on such date. For the year ended December 31, 2019, the Company recognized $105,000 in
expense in its Statements of Operations related to the advisory agreement, including approximately $45,000 in expense related to equity incentive grants of 34,000 restricted
shares.  For  the  year  ended  December  31,  2018,  the  Company  recognized  $84,000  in  expense  in  its  Statements  of  Operations  related  to  the  advisory  agreement,  including
approximately $34,000 in expense related to equity incentive grants of 20,000 restricted shares.

F-16

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stock Awards Made to Fortress Employees

In April 2017, the Company made an option award to two employees of Fortress (see Note 9).

Note 5 - Property and Equipment

Mustang’s property and equipment consisted of the following:

($ in thousands) 
Computer equipment
Furniture and fixtures
Machinery and equipment
Leasehold improvements
Construction in process
Total property and equipment
Less: accumulated depreciation
Property and equipment, net

Estimated Useful
Life (in years)
3
5
5
9
N/A

    $

    $

December 31, 
2019

December 31, 
2018

53    $
145     
4,594     
3,877     
1,157     
9,826     
(1,890)    
7,936    $

53 
111 
3,143 
3,790 
393 
7,490 
(632)
6,858 

Mustang’s depreciation expense for the year ended December 2019 and 2018 was approximately $1.3 million and $0.6 million, respectively, and was recorded in research and
development expense in the Statements of Operations.

Note 6 – Accounts Payable and Accrued Expenses

At December 31, 2019 and 2018, accounts payable and accrued expenses consisted of the following:

($ in thousands)
Accounts payable
Accrued compensation
Research and development
Other
Total accounts payable and accrued expenses

Note 7 - Commitments and Contingencies

Leases

December 31,

2019

2018

1,877    $
1,760     
1,496     
535     
5,668    $

1,386
1,093
2,604
298
5,381

  $

  $

On October 27, 2017, the Company entered into a lease agreement with WCS - 377 Plantation Street, Inc., a Massachusetts nonprofit corporation. Pursuant to the terms of the
lease agreement, we agreed to lease 27,043 square feet from the landlord, located at 377 Plantation Street in Worcester, MA (the “Facility”), through November 2026, subject to
additional extensions at the Company’s option. Base rent, net of abatements of $0.6 million over the lease term, totals approximately $3.6 million, on a triple-net basis.

The terms of the lease also require that we post an initial security deposit of $0.8 million, in the form of $0.5 million letter of credit and $0.3 million in cash, which increased to
$1.3 million ($1.0 million letter of credit, $0.3 million in cash) on November 1, 2019. After the fifth lease year, the letter of credit obligation is subject to reduction.

The Facility began operations for the production of personalized CAR T and gene therapies in 2018. 

The Company leases office space and copiers under agreements classified as operating leases that expire on various dates through 2026.  The Company’s lease liabilities result
from the lease of its Facility in Massachusetts, which expires in 2026, and its copier, which expires in 2021. Such leases do not require any contingent rental payments, impose
any financial restrictions, or contain any residual value guarantees. Certain of the Company’s leases include renewal options and escalation clauses; renewal options have not
been included in the calculation of the lease liabilities and right of use assets as the Company is not reasonably certain to exercise the options. The Company does not act as a
lessor  or  have  any  leases  classified  as  financing  leases. At  December  31,  2019,  the  Company  had  operating  lease  liabilities  of  $2.1  million  and  right  of  use  assets  of  $1.2
million, which were included in the Balance Sheet.

F-17

 
 
 
 
 
 
 
   
   
 
 
 
 
 
     
 
 
     
 
 
     
 
 
     
 
 
 
     
 
 
 
     
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The following summarizes quantitative information about the Company’s operating leases:

($ in thousands)
Lease cost

Operating lease cost
Variable lease cost

Total

($ in thousands)
Operating cash flows from operating leases
Weighted-average remaining lease term – operating leases
Weighted-average discount rate – operating leases

Maturities of our operating leases, excluding short-term leases, are as follows:

  $

  $

  $

For the Year Ended
December 31, 2019

312 
684 
996 

For the Year Ended
December 31, 2019

($ in thousands)
Year ended December 31, 2020
Year ended December 31, 2021
Year ended December 31, 2022
Year ended December 31, 2023
Thereafter
Total
Less present value discount
Operating lease liabilities

  $

  $

148 
4.3 
8.97%

76 
467 
476 
489 
1,458 
2,966 
(866)
2,100 

Note 8 - Notes Payable

On March 29, 2019 (the “Closing Date”), the Company entered into a $20.0 million Loan Agreement with Horizon, the proceeds of  which  will  provide  the  Company  with
additional working capital to continue development of its gene and cell therapies. In accordance with the Loan Agreement, $15.0 million of the $20.0 million loan was funded
on the Closing Date, with the remaining $5.0 million fundable upon the Company achieving certain predetermined milestones.

Each advance under the Horizon Loan Agreement will mature 42 months from the first day of the month following the funding of the advance. The first three advances will
mature on October 1, 2022 (the “Loan Maturity Date”). Each advance accrues interest at a per annum rate of interest equal to 9.00% plus the amount by which the one-month
LIBOR Rate, as reported in the Wall Street Journal, exceeds 2.50%. The Loan Agreement provides for interest-only payments commencing May 1, 2019, through and including
October 1, 2020. The interest-only period may be extended to April 1, 2021, if the Company satisfies the Interest Only Extension Milestone (as defined in the Loan Agreement).
Thereafter, commencing May 1, 2021, amortization payments will be payable monthly in eighteen installments of principal and interest. At its option, upon ten business days’
prior written notice to Horizon, the Company may prepay all or any portion greater than or equal to $500,000 of each of the outstanding advances by paying the entire principal
balance  (or  portion  thereof)  and  all  accrued  and  unpaid  interest,  subject  to  a  prepayment  charge  of  4.0%  of  the  then  outstanding  principal  balance  of  each  advance  if  such
advance is prepaid on or before the Loan Amortization Date (as defined in the Loan Agreement), 3% if such advance is prepaid after the Loan Amortization Date applicable to
such Loan, but on or prior to twelve months following the Loan Amortization Date, and 2% thereafter. In addition, a final payment equal to $250,000 for each advance (i.e.,
$750,000 in aggregate with respect to the initial $15.0 million) is due on the maturity date or other date of payment in full. Amounts outstanding during an event of default shall
be payable on demand and shall accrue interest at an additional rate of 5.0% per annum of the past due amount outstanding.

Each advance of the loan is secured by a lien on substantially all of the assets of the Company, other than Intellectual Property and Excluded Collateral (in each case as defined
in  the  Loan Agreement),  and  contains  customary  covenants  and  representations,  including  a  liquidity  covenant,  financial  reporting  covenant  and  limitations  on  dividends,
indebtedness, collateral, investments, distributions, transfers, mergers or acquisitions, taxes, corporate changes, deposit accounts, and subsidiaries.

F-18

 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
The events of default under the Loan Agreement include, among other things, without limitation, and subject to customary grace periods, (1) the Company’s failure to make any
payments of principal or interest under the Loan Agreement, promissory notes or other loan documents, (2) the Company’s breach or default in the performance of any covenant
under the Loan Agreement, (3) the occurrence of a material adverse change, (4) the Company making a false or misleading representation or warranty in any material respect,
(5) the Company’s insolvency or bankruptcy, (6) certain attachments or judgments on the Company’s assets, (7) the occurrence of any material default under certain agreements
or  obligations  of  the  Company  involving  indebtedness  in  excess  of  $250,000,  or  (8)  failing  to  maintain  certain  minimum  monthly  cash  balances  which  range  from
approximately $8 to $13 million over the term of the loan ($13.0 million as of December 31, 2019). If an event of default occurs, Horizon is entitled to take enforcement action,
including acceleration of amounts due under the Loan Agreement.

The Loan Agreement also contains warrant coverage of 5% of the total amount funded. Four warrants (the “Warrants”) were issued by the Company to Horizon to purchase a
combined 288,184 shares of the Company’s common stock with an exercise price of $3.47 and a fair value of $0.9 million. The Warrants are exercisable for ten years from the
date of issuance. Horizon may exercise the Warrants either by (a) cash or check or (b) through a net issuance conversion. The shares of the Company’s common stock will,
upon request by Horizon, be registered and freely tradable following a period of six months after issuance.

The Company paid Horizon an initial commitment fee of $0.2 million and reimbursed Horizon for $30,000 of legal fees in connection with the Loan Agreement. The Company
incurred approximately $1.2 million of legal and other direct costs in connection with the Loan Agreement.

All fees, warrants and costs paid to Horizon and all direct costs incurred by the Company are recognized as a debt discount to the funded loans and are amortized to interest
expense using the effective interest method over the term of the Loan Agreement.

Amortization of the debt discount associated with the funded loans was approximately $0.7 million for the year ended December 31, 2019, and was included in interest expense
in the Statements of Operations.

($ in thousands)
Horizon Notes (1)(2)
Discount on notes payable
Total notes payable
Less: current portion

Long-term notes payable

(1) Balance includes $0.75 million final payment fee 
(2) Interest rate is 9.00% plus one-month LIBOR Rate in excess of 2.5%

Note 9 - Stockholders’ Equity

Common Stock

December 31, 
2019

December 31, 
2018

  $

  $

  $

15,750    $
(2,321)    
13,429    $
(1,250)    
12,179    $

-     
-     
-     
-     
-     

Interest Rate

9.00%   

Maturity
October - 2022 

The Company, in accordance with its certificate of incorporation, as amended in July 2016, which was retroactively applied, is authorized to issue 50,000,000 common shares
with  a  par  value  of  $0.0001  per  share,  of  which  1,000,000  shares  are  designated  as  “Class A  Common  Stock”  and  15,000,000  shares  are  designated  as  “Class  B  Common
Stock” see below Stock Issuances to Fortress and Note 4.

In connection with the Company’s formation, Fortress subscribed for 7,000,000 shares of the Class B Common Stock and 2,000,000 shares of the Company’s Common Stock,
pursuant to the Founders Agreement. Fortress paid the par value of $900 in 2016. The fair value of the Company’s common shares approximated par value as no licenses had
been transferred at that time. Dividends, if and when declared, are to be distributed pro-rata to the Class A, B and Common Stockholders.

The holders of Common Stock are entitled to one vote per share of Common Stock held. The holders of Class A Common Stock are entitled to the number of votes equal to the
number of whole shares of Common Stock into which the shares of Class A Common Stock held by such holder are convertible and for a period of ten years from its issuance,
the holders of the Class A Common Stock have the right to appoint one member of the board of directors of Mustang; to date, the holders of Class A Common Stock have not
yet appointed such director.

The Class B Common Stockholders are entitled, for each share of Class B Common Stock held, to a number of votes equal to 1.1 times a fraction, the numerator of which is the
sum of (A) the shares of outstanding Common Stock and (B) the whole shares of Common Stock into which the shares of outstanding Class A Common Stock and the Class B
Common Stock are convertible and the denominator of which is the number of shares of outstanding Class B common shares.

In April  2019,  COH  converted  137,608  shares  of  the  Company’s  Class A  common  stock  to  137,608  shares  of  the  Company’s  common  stock.  In  November  2019,  COH
converted 17,007 shares of the Company’s Class A common stock to 17,007 shares of the Company’s common stock for a total of 154,615 Class A common stock converted
into the Company’s common stock in 2019.

F-19

 
 
 
 
 
 
 
 
   
   
 
 
 
   
  
   
  
  
   
  
   
  
   
  
  
   
  
 
 
 
 
 
 
 
 
 
 
 
On August  16,  2019,  the  Company’s  Board  adopted  resolutions  of  the  Board  to  ratify,  approve  and  recommend  stockholder  approval  of  an  amendment  to  the  Company’s
Amended and Restated Certificate of Incorporation, as amended, to revise Article IV, Authorized Stock thereof in order to effect an increase in the authorized number of shares
of  the  Company’s  common  stock,  par  value  $0.0001,  from  50,000,000  to  85,000,000  (the  “Amendment”).  On  August  16,  2019,  the  Company  received  approval  of  the
Amendment  by  written  consent  in  lieu  of  a  meeting  from  the  holders  of  a  majority  of  issued  and  outstanding  shares  of  the  Company’s  common  and  preferred  stock.  The
increase in authorized shares to 85,000,000 became effective on September 30, 2019.

At-the-Market Offering

On July 13, 2018, the Company filed a shelf registration statement No. 333-226175 on Form S-3, as amended on July 20, 2018 (the “2018 Mustang S-3”), which was declared
effective in August 2018. Under the 2018 Mustang S-3, the Company may sell up to a total of $75.0 million of its securities. In connection with the 2018 Mustang S-3, the
Company entered into an At-the-Market Issuance Sales Agreement (the “Mustang ATM”) with B. Riley FBR, Inc., Cantor Fitzgerald & Co., National Securities Corporation,
and Oppenheimer & Co. Inc. (each an "Agent" and collectively, the “Agents”), relating to the sale of shares of common stock. Under the Mustang ATM, the Company pays the
Agents a commission rate of up to 3.0% of the gross proceeds from the sale of any shares of common stock.

During the year ended December 31, 2019, the Company issued approximately 3.5 million shares of common stock at an average price of $6.42 per share for gross proceeds of
$22.5 million under the Mustang ATM. In connection with these sales, the Company paid aggregate fees of approximately $0.5 million for net proceeds of approximately $22.0
million. No sales were made under the 2018 Mustang ATM in 2018.

Public Offering of Common Stock

On April  30,  2019,  the  Company  announced  the  pricing  of  an  underwritten  public  offering,  whereby  we  sold  6,875,000  shares  of  common  stock,  (plus  a  30-day  option  to
purchase up to an additional 1,031,250 shares of common stock, which was fully exercised) at a price of $4.00 per share for gross proceeds of approximately $31.6 million,
before deducting underwriting discounts and commissions and offering expenses. In connection with the public offering, the Company paid aggregate fees of approximately
$2.1  million  for  net  proceeds  of  approximately  $29.5  million.  The  shares  were  sold  under  the  2018  Mustang  S-3,  filed  with  the  Securities  and  Exchange  Commission.  The
offering closed on May 2, 2019, and the over-allotment closing was on May 8, 2019.

Registration Statements

As of December 31, 2019, approximately $20.9 million of the 2018 Mustang S-3 remains available for sales of securities.

On August 16, 2019, the Company filed a shelf registration statement No. 333-233350 on Form S-3 (the “2019 Mustang S-3”), which was declared effective on September 30,
2019. Under the 2019 Mustang S-3, the Company may sell up to a total of $75.0 million of its securities. As of December 31, 2019, no securities have been sold under the 2019
Mustang S-3.

Stock Issuances to Fortress

Under the terms of the Second Amended and Restated Founders Agreement, which became effective July 22, 2016, Fortress will receive a grant of shares of our common stock
equal to two and one-half percent (2.5%) of the gross amount of any equity or debt financing. On March 29, 2019, the Company issued 108,069 shares of common stock to
Fortress, which equaled 2.5% of the gross funded amount of the Horizon Notes.

In April 2019, the Company issued 87,656 shares of common stock to Fortress, which equaled 2.5% of the gross proceeds of $22.5 million from the sale of shares of common
stock under Mustang’s At-the-Market Offering.

In May 2019, the Company issued 197,656 shares of common stock to Fortress, which equaled 2.5% of the gross proceeds of $31.6 million from the sale of shares of common
stock under Mustang’s Public Offering.

Stock Awards

Stock Options 

The Company has in effect the 2016 Incentive Plan (the “Incentive Plan”). The Incentive Plan was adopted in 2016 by our stockholders and the compensation committee of the
Company’s board of directors and is authorized to grant stock-based awards to directors, officers, employees and consultants. The plan initially authorized grants to issue up to
2,000,000 shares of authorized but unissued common stock and expires 10 years from adoption and limits the term of each option to no more than 10 years from the date of
grant. In June 2018, the Company’s stockholders approved an amendment to the Incentive Plan to increase the number of authorized shares issuable by 3,000,000 shares, for a
total of 5,000,000 shares. Total shares available for the issuance of stock-based awards under the Incentive Plan was 1,931,015 shares at December 31, 2019.

F-20

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The following table summarizes stock option activities for the year ended December 31, 2019 and 2018:

Outstanding at December 31, 2017
Options granted
Outstanding at December 31, 2018
Options granted
Outstanding at December 31, 2019
Options vested and exercisable at December 31, 2019

Stock Options

Weighted Average 
Exercise Price

1,241,675     
-     
1,241,675    $
-     
1,241,675     
388,022    $

5.73     
-     
5.73     
-     
5.73     
5.73     

Weighted Average
Remaining 
Contractual Life
(in years)

9.31 

8.31 
- 
7.31 
7.31 

As of December 31, 2019, the Company had unrecognized stock-based compensation expense related to options of $0.7 million, which is expected to be recognized over a
weighted average period of approximately 1.2 years. Effective on January 1, 2017, the Company elected to account for forfeited awards as they occur as permitted by ASU
2016-09.  Ultimately,  the  actual  expenses  recognized  over  the  vesting  period  will  be  for  those  shares  that  vested.  Prior  to  making  this  election,  the  Company  estimated  a
forfeiture rate for awards at 0%, as the Company did not have a significant history of forfeitures.

Restricted Stock

Certain employees and directors have been awarded restricted stock. The restricted stock vesting consists of milestone and time-based vesting. The following table summarizes
restricted stock award activities for the year ended December 31, 2019 and 2018:

Nonvested at December 31, 2017
Granted
Nonvested at December 31, 2018
Granted
Vested
Forfeited
Nonvested at December 31, 2019

  Number of Shares   

Weighted Average
Grant Date Fair
Value

180,000    $
322,636     
502,636    $
119,060     
-     
(322,636)    
299,060    $

5.73 
5.78 
5.76 
3.83 
- 
5.14 
5.66 

As of December 31, 2019, the Company had unrecognized stock-based compensation expense related to restricted stock of $0.7 million, which is expected to be recognized
over a weighted average period of approximately 1.9 years. This amount does not include, as of December 31, 2019, 68,158 shares of restricted stock outstanding which are
performance-based and vest upon achievement of certain corporate milestones. Stock-based compensation expense for milestone awards will be measured and recorded if and
when it is probable that the milestone will be achieved.

F-21

 
 
 
 
 
 
   
   
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
 
 
 
 
Restricted Stock Units

The following table summarizes restricted stock units’ activities for the year ended December 31, 2019 and 2018:

Nonvested at December 31, 2017
Granted
Vested
Nonvested at December 31, 2018
Granted
Forfeited
Vested
Nonvested at December 31, 2019

  Number of Units    

Weighted Average
Grant Date Fair 
Value

134,000    $
1,072,000     
(173,916)    
1,032,084    $
625,000     
(344,750)    
(199,917)    
1,112,417    $

6.53 
8.16 
9.25 
7.77 
3.01 
7.67 
7.81 
5.11 

As of December 31, 2019, the Company had unrecognized stock-based compensation expense related to restricted stock units of approximately $2.8 million, which is expected
to be recognized over a weighted average period of approximately 2.0 years. This amount does not include, as of December 31, 2019, 230,000 shares of restricted stock units
outstanding issued to non-employees, the expense for which is determined each reporting period at the measurement date. The expense is recognized over the vesting period of
the award.

The following table summarizes stock-based compensation expense for the years ended December 31, 2019 and 2018 (in thousands).

General and administrative
Research and development
Total stock-based compensation expense

Warrants

  For the year ended December 31,  

2019

2018

  $

  $

1,790    $
874     
2,664    $

3,664 
1,296 
4,960 

In connection with the Company’s offering of shares of common stock in a private placement, each investor received a warrant equal to 25% of the common shares purchased in
connection with the offering. Further, National Securities Corporation received Placement Agent Warrants.

A summary of warrant activities for years ended December 31, 2019 and 2018, is presented below:

Outstanding as of December 31, 2017
Granted
Exercised
Outstanding as of December 31, 2018
Granted
Exercised
Outstanding as of December 31, 2019

Warrants

Weighted Average
Exercise Price

Weighted Average
Remaining 
Contractual Life 
(in years)

5,253,318    $
-     
(42,620)    
5,210,698    $
288,184     
(93,213)    
5,405,669    $

8.28     
-     
4.25     
8.32     
3.47     
-     
8.20     

3.89 
- 
- 
3.10 
9.25 
- 
2.40 

Upon the exercise of warrants, the Company will issue new shares of Common Stock.

Note 10 - Income Taxes

For financial reporting purposes, the Company calculated income tax provision and deferred income tax balances as if it was a separate entity and had filed its own separate tax
return under Sub-Chapter C of the Internal Revenue Code. 

F-22

 
 
 
 
 
 
   
   
   
   
   
   
   
   
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
   
   
 
   
   
   
   
   
   
   
 
 
 
 
 
 
A reconciliation of the statutory U.S. federal rate to the Company’s effective tax rate is as follows:

Statutory federal income tax rate
State taxes, net of federal tax benefit
Non-deductible items
Credits
Federal tax rate change
State tax rate change
Other
Change in valuation allowance
Income taxes provision (benefit)

The components of the net deferred tax asset as of December 31, 2019 and 2018 are the following ($ in thousands):

Deferred tax assets:

Net operating loss carryovers
Stock compensation and other
Change in fair value of warrant liabilities
Amortization of license
Lease liability
Accruals and reserves
Startup costs
Debt issuance costs
Tax credits

Total deferred tax assets

Less: valuation allowance

Net deferred tax assets
Deferred tax liabilities:

Stock compensation and other
Unrealized gain/loss on investment
Right of use asset
Basis in subsidiary

Total deferred tax assets, net

For the year ended December 31,

2019

2018

21%    
15%    
-%    
3%    
-%    
4%    
(2)%    
(41)%   
- 

21%
7%
-%
3%
-%
(2)%
(1)%
(28)%
- 

For the year ended December 31,

2019

2018

  $

  $

  $

  $

27,446    $
2,037     
57     
9,454     
746     
519     
7     
21     
2,746     
43,033     
(42,608)    
425    $

-    $
-     
(425)     
-     
-    $

14,305 
1,427 
45 
6,258 
- 
237 
6 
-  
1,070 
23,348 
(23,348)
- 

- 
- 
- 
- 
- 

The Company has determined, based upon available evidence, that it is more likely than not that the net deferred tax asset will not be realized and, accordingly, has provided a
full  valuation  allowance  against  its  net  deferred  tax  assets  as  of  December  31,  2019  and  2018. A  valuation  allowance  of  approximately  $42.6  million  and  $23.3  million,
respectively, was recorded for the year ended December 31, 2019 and 2018.

As of December 31, 2019, the Company had federal and state net operating loss carryforwards of approximately $87.1 million and $141.1 million, respectively. The federal and
state net operating loss carryforwards will begin to expire, if not utilized, by 2035 and 2035, respectively. Utilization of the net operating loss carryforward may be subject to an
annual limitation due to the ownership change limitations provided by Section 382 of the Internal Revenue Code of 1986, as amended and similar state provisions.

There are no significant items determined to be unrecognized tax benefits taken or expected to be taken in a tax return, in accordance with ASC 740 “Income Taxes” (“ASC
740”), which clarifies the accounting for uncertainty in income taxes recognized in the financial statements, that have been recorded on the Company’s financial statements for
the period ended December 31, 2019. The Company does not anticipate a material change to unrecognized tax benefits in the next twelve months.

Additionally, ASC 740 provides guidance on the recognition of interest and penalties related to income taxes. There were no interest or penalties related to income taxes that
have been accrued or recognized as of and for the period ended December 31, 2019. 

The federal and state tax returns for the years ended December 31, 2018, 2017, and 2016 are currently open for examination under the applicable federal and state income tax
statues of limitations.

F-23

 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
   
 
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Note 11 - Quarterly Financial Information (unaudited)

(in thousands, except per share data)
2019
Total Revenue
Operating expenses
Other income (expense)
Net loss
Basic and diluted net loss per common share

2018
Total Revenue
Operating expenses
Other income
Net loss
Basic and diluted net loss per common share

Note 12 - Subsequent Events 

First Quarter

  Second Quarter     Third Quarter     Fourth Quarter  

  $
  $
  $
  $
  $

  $
  $
  $
  $
  $

  $
- 
  $
9,754 
141 
  $
(9,613)   $
(0.34)   $

  $
50 
  $
6,477 
146 
  $
(6,281)   $
(0.24)   $

-    $
10,212    $
(187)   $
(10,399)   $
(0.29)   $

-    $
5,240    $
147    $
(5,093)   $
(0.19)   $

-    $
9,996    $
(172)   $
(10,168)   $
(0.25)   $

-    $
7,656    $
138    $
(7,518)   $
(0.28)   $

- 
15,923 
(286)
(16,209)
(0.41)

(50)
11,850 
130 
(11,770)
(0.43) 

Management has evaluated subsequent events through the date the financial statements were available to be issued.

F-24

 
 
 
 
 
 
 
  
 
 
      
      
  
  
 
  
 
 
      
      
  
 
 
  
 
 
      
      
  
 
 
 
 
 
Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the registrant has duly caused this Form 10-K to be signed on its behalf by the undersigned,
thereunto duly authorized.

SIGNATURES

Mustang Bio, Inc.

By:

/s/ Manuel Litchman
Name: Manuel Litchman
Title: President and Chief Executive Officer

March 13, 2020

 POWER OF ATTORNEY

We, the undersigned directors and/or executive officers of Mustang Bio, Inc., hereby severally constitute and appoint Manuel Litchman, acting singly, his or her true and lawful
attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her in any and all capacities, to sign this Form 10-K and to file the same, with all 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 necessary or appropriate to be done in connection therewith, as fully for all intents and purposes as he or she might or could do in
person, hereby approving, ratifying and confirming all that said attorney-in-fact and agent, or his substitute, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Form 10-K has been signed below by the following persons on behalf of the registrant and in the
capacities and on the dates indicated.

Signature

Title

/s/ Michael S. Weiss
Michael S. Weiss

/s/ Manuel Litchman
Manuel Litchman, M.D.

/s/ Lindsay A. Rosenwald
Lindsay A. Rosenwald, M.D.

/s/ Neil Herskowitz
Neil Herskowitz

/s/ Adam Chill
Adam Chill

/s/ Michael Zelefsky
Michael Zelefsky, M.D.

/s/ Brian Achenbach
Brian Achenbach

Executive Chairman of the Board

President and Chief Executive Officer

Director

Director

Director

Director

Date

March 13, 2020

March 13, 2020

March 13, 2020

March 13, 2020

March 13, 2020

March 13, 2020

Senior Vice President of Finance & Corporate Controller

March 13, 2020

60

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DESCRIPTION OF THE REGISTRANT’S SECURITIES
REGISTERED PURSUANT TO SECTION 12 OF THE
SECURITIES EXCHANGE ACT OF 1934

DESCRIPTION OF CAPITAL STOCK

EXHIBIT 4.3

When used herein, the terms “Company,” “we,” “our,” and “us” refer to Mustang Bio, Inc.

Capital Stock

The Company is authorized to issue 85,000,000 shares of common stock with a par value of $0.0001 per share, of which 1,000,000 shares are designated as Class A

common stock and 2,000,000 of preferred stock at $0.0001 par value of which 250,000 are designated as Class A preferred stock.

The holders of common stock are entitled to one vote per share of common stock held.

The undesignated preferred stock may be issued from time to time in one or more series. The Board of Directors is authorized to determine or alter the dividend rights,
dividend  rate,  conversion  rights,  voting  rights,  rights  and  terms  of  redemption  (including  sinking  fund  provisions,  if  any),  the  redemption  price  or  prices,  the  liquidation
preferences  and  other  designations,  powers,  preferences  and  relative,  participating,  optional  or  other  special  rights,  if  any,  and  the  qualifications,  limitations  and  restrictions
granted to or imposed upon any wholly unissued series of preferred stock, and to fix the number of shares of any series of preferred stock (but not below the number of shares of
any such series then outstanding).

Class A Common Stock

The holders of Class A common stock are entitled to the number of votes equal to the number of whole shares of common stock into which the shares of Class A
common shares held by such holder are convertible. For a period of ten years from issuance, the holders of the Class A common stock have the right to appoint one member of
the board of directors of Mustang. To date, the holders of Class A common stock have not yet appointed such director.

Class A Preferred Stock

The Class A Preferred Stock is identical to undesignated common stock other than as to voting rights, conversion rights, and the PIK dividend right.

The holders of the outstanding shares of Class A Preferred Stock receive on each January 1 (each a “PIK Dividend Payment Date”) after the original issuance date of
the Class A Preferred Stock until the date all outstanding Class A Preferred Stock is converted into common stock or redeemed (and the purchase price is paid in full), pro rata
per share dividends paid in additional fully paid and non-assessable shares of common stock such that the aggregate number of shares of common stock issued pursuant to such
PIK dividend is equal to 2.5% of the Corporation’s fully-diluted outstanding capitalization on the date that is one business day prior to any PIK Dividend Payment Date (“PIK
Record Date”). In the event the Class A Preferred Stock converts into common stock, the holders shall receive all PIK dividends accrued through the date of such conversion.
No dividend or other distribution shall be paid, or declared and set apart for payment (other than dividends payable solely in capital stock on the capital stock) on the shares of
common stock until all PIK dividends on the Class A Preferred Stock shall have been paid or declared and set apart for payment. All dividends are non-cumulative.

On any matter presented to the stockholders for their action or consideration at any meeting of stockholders (or by written consent of stockholders in lieu of meeting),
each holder of outstanding shares of Class A Preferred Stock shall be entitled to cast for each share of Class A Preferred Stock held by such holder as of the record date for
determining stockholders entitled to vote on such matter, the number of votes that is equal to one and one-tenth (1.1) times a fraction, the numerator of which is the sum of (A)
the number of shares of outstanding common stock and (B) the whole shares of common stock in to which the shares of outstanding Class A Common Stock and the Class A
Preferred Stock are convertible, and the denominator of which is number of shares of outstanding Class A Preferred Stock. Thus, the Class A Preferred Stock will at all times
constitute a voting majority.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Each  share  of  Class A  Preferred  Stock  is  convertible,  at  the  option  of  the  holder,  into  one  fully  paid  and  nonassessable  share  of  common  stock,  subject  to  certain
adjustments. If the Company, at any time effects a subdivision or combination of the outstanding common stock (by any stock split, stock dividend, recapitalization, reverse
stock  split  or  otherwise),  the  applicable  conversion  ratio  in  effect  immediately  before  that  subdivision  is  proportionately  decreased  or  increased,  as  applicable,  so  that  the
number of shares of common stock issuable on conversion of each share of Class A Preferred Stock shall be increased or decreased, as applicable, in proportion to such increase
or  decrease  in  the  aggregate  number  of  shares  of  common  stock  outstanding. Additionally,  if  any  reorganization,  recapitalization,  reclassification,  consolidation  or  merger
involving the Company occurs in which the common stock (but not the Class A Preferred Stock) is converted into or exchanged for securities, cash or other property, then each
share of Class A Preferred Stock becomes convertible into the kind and amount of securities, cash or other property which a holder of the number of shares of common stock of
the Company issuable upon conversion of one share of the Class A Preferred Stock immediately prior to such reorganization, recapitalization, reclassification, consolidation or
merger would have been entitled to receive pursuant to such transaction.

Additional Features

Other features of our capital stock include:

·

·

·

·

·

Dividend Rights.  The  holders  of  outstanding  shares  of  our  common  stock,  including  Class A  common  stock,  are  entitled  to  receive  dividends  out  of  funds
legally available at the times and in the amounts that our board of directors may determine. All dividends are non-cumulative.

Voting Rights.  The  holders  of  our  common  stock  are  entitled  to  one  vote  for  each  share  of  common  stock  held  on  all  matters  submitted  to  a  vote  of  the
stockholders, including the election of directors. Our certificate of incorporation and bylaws do not provide for cumulative voting rights.

No Preemptive or Similar Rights. The holders of our common stock have no preemptive, conversion, or subscription rights, and there are no redemption or
sinking fund provisions applicable to our common stock.

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,  including  Class A  common  stock,  outstanding  at  that  time  after  payment  of  other
claims of creditors, if any.

Fully Paid and Non-Assessable. All of the outstanding shares of our common stock, including Class A common stock, and the Class A Preferred Stock are duly
issued, fully paid and non-assessable.

DESCRIPTION OF WARRANTS

The terms relating to any warrants to purchase shares of our common stock or preferred stock, in one or more series together with other securities or separately, will

include some or all of the following:

·

·

·

·

·

·

·

·

the title of the warrants;

the aggregate number of warrants offered;

the designation, number and terms of the shares of common stock purchasable upon exercise of the warrants and procedures by which those numbers may be
adjusted;

the exercise price of the warrants;

the dates or periods during which the warrants are exercisable;

the designation and terms of any securities with which the warrants are issued;

if the warrants are issued as a unit with another security, the date on and after which the warrants and the other security will be separately transferable;

if the exercise price is not payable in U.S. dollars, the foreign currency, currency unit or composite currency in which the exercise price is denominated;

2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
·

·

·

·

any minimum or maximum amount of warrants that may be exercised at any one time;

any terms relating to the modification of the warrants;

any terms, procedures and limitations relating to the transferability, exchange or exercise of the warrants; and

any other specific terms of the warrants.

DESCRIPTION OF DEBT SECURITIES

We may offer debt securities which may be senior, subordinated or junior subordinated and may be convertible. Unless otherwise specified, our debt securities will be
issued in one or more series under an indenture to be entered into between us and a trustee. The debt securities will be issued under an indenture to be entered into between us
and a trustee. The terms of the debt securities will include those stated in the indenture and those made part of the indenture by reference to the Trust Indenture Act of 1939, as
in effect on the date of the indenture. The indenture will be subject to and governed by the terms of the Trust Indenture Act of 1939.

The following description briefly sets forth certain general terms and provisions of the debt securities that we may offer.

Debt Securities

The aggregate principal amount of debt securities that may be issued under the indenture is unlimited. The debt securities may be issued in one or more series as may
be authorized from time to time pursuant to a supplemental indenture entered into between us and the trustee or an order delivered by us to the trustee. Debt securities we offer
will be subject to the following terms and conditions of the series of debt securities being offered, to the extent applicable:

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

title and aggregate principal amount;

whether the debt securities will be senior, subordinated or junior subordinated;

applicable subordination provisions, if any;

provisions regarding whether the debt securities will be convertible or exchangeable into other securities or property of the Company or any other person;

percentage or percentages of principal amount at which the debt securities will be issued;

maturity date(s);

interest rate(s) or the method for determining the interest rate(s);

whether interest on the debt securities will be payable in cash or additional debt securities of the same series;

dates on which interest will accrue or the method for determining dates on which interest will accrue and dates on which interest will be payable;

whether the amount of payment of principal of, premium, if any, or interest on the debt securities may be determined with reference to an index, formula or
other method;

redemption,  repurchase  or  early  repayment  provisions,  including  our  obligation  or  right  to  redeem,  purchase  or  repay  debt  securities  under  a  sinking  fund,
amortization or analogous provision;

if other than the debt securities’ principal amount, the portion of the principal amount of the debt securities that will be payable upon declaration of acceleration
of the maturity;

authorized denominations;

form;

amount of discount or premium, if any, with which the debt securities will be issued, including whether the debt securities will be issued as “original issue
discount” securities;

the place or places where the principal of, premium, if any, and interest on the debt securities will be payable;

where the debt securities may be presented for registration of transfer, exchange or conversion;

3

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

the place or places where notices and demands to or upon the Company in respect of the debt securities may be made;

whether the debt securities will be issued in whole or in part in the form of one or more global securities;

if the debt securities will be issued in whole or in part in the form of a book-entry security, the depository or its nominee with respect to the debt securities and
the circumstances under which the book-entry security may be registered for transfer or exchange or authenticated and delivered in the name of a person other
than the depository or its nominee;

whether a temporary security is to be issued with respect to such series and whether any interest payable prior to the issuance of definitive securities of the
series will be credited to the account of the persons entitled thereto;

the terms upon which beneficial interests in a temporary global security may be exchanged in whole or in part for beneficial interests in a definitive global
security or for individual definitive securities;

the  guarantors,  if  any,  of  the  debt  securities,  and  the  extent  of  the  guarantees  and  any  additions  or  changes  to  permit  or  facilitate  guarantees  of  such  debt
securities;

any covenants applicable to the particular debt securities being issued;

any defaults and events of default applicable to the debt securities, including the remedies available in connection therewith;

currency,  currencies  or  currency  units  in  which  the  purchase  price  for,  the  principal  of  and  any  premium  and  any  interest  on,  such  debt  securities  will  be
payable;

time period within which, the manner in which and the terms and conditions upon which the Company or the purchaser of the debt securities can select the
payment currency;

securities exchange(s) on which the debt securities will be listed, if any;

whether any underwriter(s) will act as market maker(s) for the debt securities;

extent to which a secondary market for the debt securities is expected to develop;

provisions relating to defeasance;

provisions relating to satisfaction and discharge of the indenture;

any restrictions or conditions on the transferability of the debt securities;

provisions relating to the modification of the indenture both with and without the consent of holders of debt securities issued under the indenture;

any addition or change in the provisions related to compensation and reimbursement of the trustee;

provisions, if any, granting special rights to holders upon the occurrence of specified events;

whether the debt securities will be secured or unsecured, and, if secured, the terms upon which the debt securities will be secured and any other additions or
changes relating to such security; and

any other terms of the debt securities that are not inconsistent with the provisions of the Trust Indenture Act (but may modify, amend, supplement or delete any
of the terms of the indenture with respect to such series of debt securities).

4

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
General

One  or  more  series  of  debt  securities  may  be  sold  as  “original  issue  discount”  securities.  These  debt  securities  would  be  sold  at  a  substantial  discount  below  their
stated principal amount, bearing no interest or interest at a rate which at the time of issuance is below market rates. One or more series of debt securities may be variable rate
debt securities that may be exchanged for fixed rate debt securities.

Debt securities may be issued where the amount of principal and/or interest payable is determined by reference to one or more currency exchange rates, commodity
prices, equity indices or other factors. Holders of such debt securities may receive a principal amount or a payment of interest that is greater than or less than the amount of
principal or interest otherwise payable on such dates, depending upon the value of the applicable currencies, commodities, equity indices or other factors.

The term “debt securities” includes debt securities denominated in U.S. dollars or, if applicable, in any other freely transferable currency or units based on or relating

to foreign currencies.

We expect most debt securities to be issued in fully registered form without coupons and in denominations of $1,000 and any integral multiples thereof. Subject to
applicable limitations, debt securities that are issued in registered form may be transferred or exchanged at the principal corporate trust office of the trustee, without the payment
of any service charge, other than any tax or other governmental charge payable in connection therewith.

Global Securities

The debt securities of a series may be issued in whole or in part in the form of one or more global securities that will be deposited with, or on behalf of, a depositary.
Global  securities  will  be  issued  in  registered  form  and  in  either  temporary  or  definitive  form.  Unless  and  until  it  is  exchanged  in  whole  or  in  part  for  the  individual  debt
securities,  a  global  security  may  not  be  transferred  except  as  a  whole  by  the  depositary  for  such  global  security  to  a  nominee  of  such  depositary  or  by  a  nominee  of  such
depositary to such depositary or another nominee of such depositary or by such depositary or any such nominee to a successor of such depositary or a nominee of such successor.

Governing Law

The indenture and the debt securities shall be construed in accordance with and governed by the laws of the State of New York.

DESCRIPTION OF UNITS

We  may  issue,  in  one  more  series,  units  comprised  of  shares  of  our  common  stock,  preferred  stock,  warrants  to  purchase  common  stock  or  preferred  stock,  debt
securities or any combination of those securities. Each unit will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of
a unit will have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the
unit may not be held or transferred separately, at any time or at any time before a specified date.

We may evidence units by unit certificates that we issue under a separate agreement. We may issue the units under a unit agreement between us and one or more unit
agents. If we elect to enter into a unit agreement with a unit agent, the unit agent will act solely as our agent in connection with the units and will not assume any obligation or
relationship of agency or trust for or with any registered holders of units or beneficial owners of units.

The terms of the series of units that may be offered will include:

·

·

·

the designation and terms of the units and of the securities comprising the units, including whether and under what circumstances those securities may be held
or transferred separately;

any provisions of the governing unit agreement that differ from those described herein; and

any provisions for the issuance, payment, settlement, transfer or exchange of the units or of the securities comprising the units.

The other provisions regarding our common stock, preferred stock, warrants and debt securities as described in this exhibit will apply to each unit to the extent such

unit consists of shares of our common stock, warrants and/or debt securities.

5

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Consent of Independent Registered Public Accounting Firm

Exhibit 23.1 

Mustang Bio, Inc.
New York, New York

We  hereby  consent  to  the  incorporation  by  reference  in  the  Registration  Statements  on  Form  S-3  (Nos.  333-226175  and  333-233350)  and  Form  S-8  (Nos.  333-221819)  of
Mustang Bio, Inc. of our report dated March 16, 2020 relating to the financial statements, which appears in this Form 10-K.

/s/ BDO USA, LLP

Boston, Massachusetts
March 16, 2020

 
 
 
 
 
 
 
 
 
 
CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 31.1

I, Manual Litchman, M.D., President and Chief Executive Officer (Principal Executive Officer), certify that:

(1)

I have reviewed this Annual Report on Form 10-K for the year ended December 31, 2019 of Mustang Bio, Inc. (the registrant);

(2) 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;

(3) 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 registrant as of, and for, the periods presented in this report;

(4) The registrant’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 registrant and have:

(a) 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 registrant is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) 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;

(c) evaluated  the  effectiveness  of  the  registrant’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

(d) disclosed in the report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the
registrant’s  fourth  fiscal  quarter  in  the  case  of  an  annual  report)  that  has  materially  affected,  or  is  reasonably  likely  to  materially  affect,  the  registrant’s  internal
control over financial reporting; and

(5) The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors

and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) 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 registrant’s ability to record, process, summarize and report financial information; and

(b) any  fraud,  whether  or  not  material,  that  involves  management  or  other  employees  who  have  a  significant  role  in  the  registrant’s  internal  control  over  financial

reporting.

Dated: March 13, 2020

By:

/s/ Manuel Litchman
Manuel Litchman, M.D.
President and Chief Executive Officer
(Principal Executive Officer)

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 

EXHIBIT 31.2

I, Brian Achenbach, Senior Vice President of Finance & Corporate Controller (Principal Financial Officer), certify that:

(1)

I have reviewed this Annual Report on Form 10-K for the year ended December 31, 2019 of Mustang Bio, Inc. (the registrant);

(2) 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;

(3) 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 registrant as of, and for, the periods presented in this report;

(4) The registrant’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 registrant and have:

(a) 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 registrant is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) 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;

(c) evaluated  the  effectiveness  of  the  registrant’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

(d) disclosed in the report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the
registrant’s  fourth  fiscal  quarter  in  the  case  of  an  annual  report)  that  has  materially  affected,  or  is  reasonably  likely  to  materially  affect,  the  registrant’s  internal
control over financial reporting; and

(5) The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors

and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) 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 registrant’s ability to record, process, summarize and report financial information; and

(b) any  fraud,  whether  or  not  material,  that  involves  management  or  other  employees  who  have  a  significant  role  in  the  registrant’s  internal  control  over  financial

reporting.

Dated: March 13, 2020

By:

/s/ Brian Achenbach
Brian Achenbach
Senior Vice President of Finance & Corporate Controller
(Principal Financial Officer)  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002  

EXHIBIT 32.1

In connection with the Annual Report on Form 10-K of Mustang Bio, Inc. (the “Company”) for the period ended December 31, 2019, as filed with the Securities and Exchange
Commission on the date hereof (the “Report”), I, Manuel Litchman, M.D., President and Chief Executive Officer, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of, and for, the periods
presented in the Report.

Dated: March 13, 2020

By:

/s/ Manuel Litchman
Manuel Litchman, M.D.,
President and Chief Executive Officer
(Principal Executive Officer)

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 32.2

In connection with the Annual Report on Form 10-K of Mustang Bio, Inc. (the “Company”) for the period ended December 31, 2019, as filed with the Securities and Exchange
Commission on the date hereof (the “Report”), I, Brian Achenbach, Senior Vice President Finance & Corporate Controller, hereby certify, pursuant to 18 U.S.C. Section 1350,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company, as of, and for, the periods
presented in the Report.

Dated: March 13, 2020

By:

/s/ Brian Achenbach
Brian Achenbach
Senior Vice President of Finance & Corporate Controller
(Principal Financial Officer)