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TG Therapeutics

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FY2020 Annual Report · TG Therapeutics
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

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

For the fiscal year ended December 31, 2020.

OR

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

For the transition period from ________ to ________.

Commission File Number 1-32639
TG THERAPEUTICS, INC.
(Exact name of registrant as specified in its charter)

(State or other jurisdiction of incorporation or organization)

Delaware

36-3898269
(I.R.S. Employer Identification No.)

2 Gansevoort St., 9th Floor
New York, New York
(Address of principal executive offices)

10014
(Zip Code)

Registrant’s telephone number, including area code: (212) 554-4484

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

Title of Class
Common Stock, par value $0.001

Trading Symbol(s)
TGTX

Exchange Name
Nasdaq Capital 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 ☐

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 ☒

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 ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§
232.405 of this Chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

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

Accelerated filer ☐
Smaller reporting company ☐
Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial
accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial
reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

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

The aggregate market value of voting common stock held by non-affiliates of the registrant (assuming, for purposes of this calculation, without conceding, that all executive
officers and directors are “affiliates”) was $2,163,126,348 as of June 30, 2020, based on the closing sale price of such stock as reported on the NASDAQ Capital Market.

There were 140,586,187 shares of the registrant’s common stock, $0.001 par value, outstanding as of February 24, 2021.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated by reference in Part III of this Annual Report on Form 10-

K.

    
    
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TG THERAPEUTICS, INC.
ANNUAL REPORT ON FORM 10-K
FOR THE FISCAL YEAR ENDED DECEMBER 31, 2020

TABLE OF CONTENTS

SPECIAL CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS
SUMMARY RISK FACTORS

PART I
ITEM 1
ITEM 1A
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
ITEM 14

PART IV

Business
Risk Factors
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 Disclosure About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements With Accountants on Accounting and Financial Disclosures
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
Principal Accounting Fees and Services

ITEM 15

Exhibits and Financial Statement Schedules

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SPECIAL CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS

Certain matters discussed in this report, including matters discussed under the captions “Business” and “Management’s Discussion
and Analysis of Financial Condition and Results of Operations,” may constitute forward-looking statements for purposes of the Securities
Act of 1933, as amended, or the Securities Act, and the Securities Exchange Act of 1934, as amended, or 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. In some cases, you
can identify forward-looking statements by words such as “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,”
“intend,” “may,” “plan,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will,” “would” or the negative of these words or other
comparable terminology, although not all forward-looking statements contain these identifying words.

All  written  or  oral  forward-looking  statements  attributable  to  us  are  expressly  qualified  in  their  entirety  by  these  cautionary
statements. In addition, with respect to all of our forward-looking statements, we claim the protection of the safe harbor for forward-looking
statements contained in the Private Securities Litigation Reform Act of 1995.  Such forward-looking statements include, but are not limited
to, statements about our:

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our  ability  to  establish  and  maintain  a  commercial  infrastructure,  and  to  successfully  launch,  market  and  sell  UKONIQTM
(umbralisib) in the U.S. and any products for which we obtain regulatory approval in the future;
the commercialization of UKONIQ and any future products, including the rate and degree of market acceptance and pricing and
reimbursement;
the timing of and our ability to apply for, obtain and maintain regulatory approvals for our product candidates;
the  initiation,  timing,  progress  and  results  of  our  pre-clinical  studies  and  clinic  trials,  including,  without  limitation,  UNITY-CLL
Phase 3 clinical trial, ULTIMATE I and II Phase 3 clinical trial and UNITY-NHL Phase 2b clinical trial;
our ability to advance drug candidates into, and successfully complete, clinical trials;
our  ability  to  establish  and  maintain  contractual  relationships,  on  commercially  reasonable  terms,  with  third  parties  for
manufacturing, distribution and supply, and a range of other support functions for our clinical development and commercialization
efforts;
the implementation of our business model, strategic plans for our business, drug candidates and technology;
the  scope  of  protection  we  are  able  to  establish  and  maintain  for  intellectual  property  rights  covering  our  products  and  product
candidates;
estimates of our expenses, future revenues, capital requirements and our needs for additional financing;
our ability to maintain and establish collaborations and enter into strategic arrangements, if desired;
our financial performance and cash burn management; and
developments relating to our competitors and our industry.

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SUMMARY RISK FACTORS

Our  business  is  subject  to  a  number  of  risks  of  which  you  should  be  aware  before  making  an  investment  decision.  The  risks
described below are a summary of the principal risks associated with an investment in us and are not the only risks we face.  You should
carefully  consider  these  risks,  the  risk  factors  in  Item  IA,  and  the  other  reports  and  documents  that  we  have  filed  with  the  Securities  and
Exchange Commission (“SEC”).

Risks Related to Commercialization

● We have limited experience as a commercial company and the marketing and sale of UKONIQ (umbralisib) or any future approved

products may be less successful than anticipated or unsuccessful.

● If  UKONIQ  or  any  future  approved  product  does  not  achieve  broad  market  acceptance  among  physicians,  patients,  healthcare

payors, and the medical community, the revenues that we generate from product sales will be limited.

● If we are unable to maintain regulatory approval for UKONIQ or obtain or maintain regulatory approval for our drug candidates, or

experience significant delays in doing so, our business will be materially harmed.

● If  the  market  opportunities  for  UKONIQ  and  future  approved  products  are  smaller  than  we  estimate  or  if  any  approval  that  we

obtain is based on a narrower patient population, our revenue will be adversely affected.

● We face substantial competition for treatments for our target indications, which may result in others commercializing drugs before

or more successfully than we do resulting in the reduction or elimination of our commercial opportunity.

● If we are unable to establish additional commercial capabilities and infrastructure, we may be unable to generate sufficient revenue

to sustain our business.

● Product liability lawsuits against us could cause us to incur substantial liabilities and could limit commercialization of any of our

approved products or drug candidates that we may develop.

Risks Related to our Financial Position and Need for Additional Capital

● We  have  incurred  significant  operating  losses  since  our  inception  and  anticipate  that  we  will  incur  continued  losses  for  the

foreseeable future.

● We  will  need  to  raise  substantial  additional  funding.  If  we  are  unable  to  raise  capital  when  needed,  we  will  be  forced  to  delay,

reduce or eliminate some of our drug development programs or commercialization efforts.

● Our level of indebtedness and debt service obligations could adversely affect our financial condition and may make it more difficult

for us to fund our operations.

Risks Related to Drug Development and Regulatory Approval

● We may incur additional costs or experience delays in completing, or ultimately be unable to complete, the clinical development and

commercialization of our drug candidates.

● Our  products  and  product  candidates  may  cause  undesirable  side  effects  that  could  delay  or  prevent  their  regulatory  approval  or

significantly limit their commercial profile following marketing approval, if any.

● Because results of preclinical studies and early clinical trials are not necessarily predictive of future results, any product candidate
we advance may not have favorable results in later clinical trials or receive regulatory approval.  Moreover, interim, “top-line,” and
preliminary data from our clinical trials that we announce or publish may change, or the perceived product profile may be impacted,
as more patient data or additional endpoints (including efficacy and safety) are analyzed.

● Any product candidates we may advance through 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.

● A Fast Track or Breakthrough Therapy designation by the FDA may not actually lead to a faster development, regulatory review or

approval process.

● Although we have received orphan drug designation for UKONIQ and for some of our drug candidates for specified indications and
may seek orphan drug designation for additional indications or drug candidates, we may be unsuccessful in obtaining or may be
unable to maintain the benefits associated with orphan drug status.

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Risks Related to Governmental Regulation of the Pharmaceutical Industry

● We  are  subject  to  extensive  regulation,  including  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.

● If we fail to comply with various healthcare laws and regulations, we may incur losses or be subject to liability.
● If we fail to fail to comply with regulatory requirements, any product for which we obtain marketing approval could be subject to

restrictions or withdrawal from the market and we may be subject to penalties.

Risks Related to our Dependence on Third Parties

● If  the  third  parties  on  which  we  rely  to  conduct  our  clinical  trials  and  generate  clinical,  preclinical  and  other  data  necessary  to
support our regulatory applications do not perform their services as required, we may not be able to obtain regulatory approval for
or commercialize our product candidates when expected or at all.

● Our reliance on third parties for commercial and clinical supply of our products and product candidates increases the risk that we
will not have sufficient quantities of our products or product candidates or such quantities at an acceptable cost or quality, which
could delay, prevent or impair our development or commercialization efforts.

● Because we have in-licensed our products and product candidates from third parties, any dispute with or non-performance by our

licensors will adversely affect our ability to develop and commercialize the applicable product.

Risks Related to Intellectual Property

● Our  success  depends  upon  our  ability  to  obtain  and  protect  our  intellectual  property  and  if  the  scope  of  our  patent  protection
obtained is not sufficiently broad, our competitors could develop and commercialize products similar or identical to ours, and our
ability to successfully commercialize our products may be impaired.

● Our  patent  protection  could  be  reduced  or  eliminated  for  non-compliance  with  various  procedural,  document  submission,  fee

payment and other requirements imposed by governmental patent agencies.

● 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.

● If we or our partners 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.

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

Risks Related to COVID-19

● Public health issues, and specifically the pandemic caused by COVID-19, could have an adverse impact on our financial condition

and results of operations and other aspects of our business.

General Risks Related to Our Business Organization and Governance, Strategy, Employees and Growth Management

● We will need to develop and expand our business, which could disrupt our operations.
● Our ability to continue our clinical development and commercialization activities will depend on our ability to attract and maintain

key management and other personnel.

● Certain of our executive officers, directors and other stockholders own more than 10% of our outstanding common stock and may

be able to influence our management and the outcome of matters submitted to shareholders for approval.

● Certain  anti-takeover  provisions  in  our  charter  documents  and  Delaware  law  could  make  a  third-party  acquisition  more  difficult,

which could limit the price investors might be willing to pay for our common stock.
Our stock price is, and we expect it to remain, volatile, which could limit investors ability to sell stock at a profit.

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PART I

  Unless  the  context  requires  otherwise,  references  in  this  report  to  “TG,”  “Company,”  “we,”  “us”  and  “our”  refer  to  TG
Therapeutics, Inc. and our subsidiaries. Our name, logo and UKONIQ are trademarks or tradenames of TG Therapeutics, Inc.  All other
trademarks, service marks or other tradenames appearing in this Annual Report on Form 10-K are the property of their respective owners.

ITEM 1. BUSINESS.

OVERVIEW

TG Therapeutics is a fully-integrated, commercial stage biopharmaceutical company focused on the acquisition, development and
commercialization of novel treatments for B-cell malignancies and autoimmune diseases. In addition to an active research pipeline including
five  investigational  medicines  across  these  therapeutic  areas,  we  have  received  accelerated  approval  from  the  U.S.  Food  and  Drug
Administration (FDA) for UKONIQ (umbralisib),  for  the  treatment  of  adult  patients  with  relapsed  or  refractory  marginal  zone  lymphoma
who  have  received  at  least  one  prior  anti-CD20-based  regimen  and  relapsed  or  refractory  follicular  lymphoma  who  have  received  at  least
three prior lines of systemic therapies. Currently, we have two programs in Phase 3 development for the treatment of patients with relapsing
forms of multiple sclerosis (RMS) and patients with chronic lymphocytic leukemia (CLL) and several investigational medicines in Phase 1
clinical  development.  We  also  actively  evaluate  complementary  products,  technologies  and  companies  for  in-licensing,  partnership,
acquisition and/or investment opportunities.

FDA Accelerated Approval of UKONIQ

On February 5, 2021, we announced that the FDA granted accelerated approval of umbralisib, now referred to as UKONIQ, for the
treatment  of  adult  patients  with  relapsed  or  refractory  Marginal  Zone  Lymphoma  (MZL)  who  have  received  at  least  one  prior  anti-CD20
based  regimen  and  adult  patients  with  relapsed  or  refractory  Follicular  Lymphoma  (FL)  who  have  received  at  least  three  prior  lines  of
systemic  therapy.  UKONIQ  is  the  first  and  only,  oral,  once  daily,  inhibitor  of  phosphoinositide  3  kinase  (PI3K)  delta  and  casein  kinase
1  (CK1)  epsilon.  Accelerated  approval  was  granted  for  these  indications  based  on  overall  response  rate  (ORR)  data  from  the  Phase  2b
UNITY-NHL Trial (NCT02793583). Continued approval for these indications may be contingent upon verification and description of clinical
benefit  in  a  confirmatory  trial.  This  application  was  granted  priority  review  for  the  MZL  indication.  In  addition,  UKONIQ  was  granted
Breakthrough Therapy Designation (BTD) for the treatment of MZL and orphan drug designation (ODD) for the treatment of MZL and FL.

Current Phase 3 or Registration Directed Clinical Trial Highlights:

We have initiated and enrolled several Phase 3 and registration-directed Phase 2b clinical trials (i.e., clinical trials that may support a
marketing application for approval). The following are highlights from our current Phase 3 trials and registration-directed Phase 2b clinical
trials:

● UNITY-NHL Phase 2b Trial:  UNITY-NHL  is  a  broad  Phase  2b  registration-directed  clinical  trial  designed  to  evaluate  the
efficacy and safety of umbralisib monotherapy and ublituximab and umbralisib (U2) combinations in patients with previously
treated  non-Hodgkin’s  lymphoma  (NHL).  The  trial  is  currently  enrolling  patients  with  relapsed/refractory  marginal  zone
lymphoma  (MZL),  follicular  lymphoma  (FL),  small  lymphocytic  lymphoma  (SLL),  and  mantle  cell  lymphoma  (MCL)  to
receive umbralisib either alone or in combination.

o UMBRALISIB MONOTHERAPY MZL/FL COHORTS: The MZL and the FL single agent umbralisib cohorts of
the UNITY-NHL trial met their primary endpoint of ORR. Data from these cohorts were presented in December 2020 at
the  62nd  American  Society  of  Hematology  annual  meeting.    In  addition,  data  from  the  MZL  and  FL  monotherapy
cohorts  were  used  to  support  a  New  Drug  Application  (NDA)  for  umbralisib  to  treat  adult  patients  with  relapsed  or
refractory MZL and FL, which was approved by the FDA on February 5, 2021.

● UNITY-CLL  Phase  3  Trial  Evaluating  Umbralisib  plus  Ublituximab  (U2):  UNITY-CLL  is  a  global  Phase  3  randomized
controlled clinical trial comparing the U2 combination to an active control arm of obinutuzumab plus chlorambucil in patients
with both treatment naive and relapsed or refractory CLL. Two additional arms evaluating single agent ublituximab and single
agent umbralisib were also enrolled for purposes of evaluating contribution in the U2 combination regimen. The primary

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endpoint for this study is progression free survival (PFS). This trial is conducted under Special Protocol Assessment (SPA) with
the FDA. In early December 2020, we initiated a rolling submission of a Biologics License Application (BLA) for ublituximab
in combination with umbralisib as a treatment for patients with CLL, with the completion of the rolling submission targeted for
the  first  half  of  2021.    On  December  7,  2020,  we  presented  safety  and  efficacy  results  from  the  UNITY-  CLL  trial  at  the
American  Society  of  Hematology  (ASH)  annual  meeting,  demonstrating  that  U2  significantly  improved  PFS  over
obinutuzumab plus chlorambucil (HR=0.54, p<0.0001) as well as ORR (p<0.001) in patients with CLL; with consistent PFS
improvement across subgroups, including treatment naïve CLL (HR=0.48) and relapsed/refractory CLL (HR=0.60).

● ULTIMATE  I  &  II  Trials  Evaluating  Single  Agent  Ublituximab  in  RMS:  ULTIMATE  I  and  ULTIMATE  II  are  two
independent Phase 3 trials. Each trial is a global, randomized, multi-center, double-blinded, double-dummy, active-controlled
study  comparing  ublituximab  to  teriflunomide  in  subjects  with  relapsing  forms  of  Multiple  Sclerosis  (RMS).  The  primary
endpoint for each study is Annualized Relapse Rate (ARR) following 96 weeks of treatment which we intend to use to support
a submission for approval of ublituximab in RMS. These trials are conducted under a SPA with the FDA. In December 2020,
we announced positive topline results from the ULTIMATE I & II Phase 3 trials. Both studies met their primary endpoint of
significantly reducing ARR (p<0.005 in each study) with ublituximab demonstrating an ARR of <0.10 in each of the studies
with  relative  reductions  of  approximately  60%  and  50%  in  ARR  over  teriflunomide  observed  in  ULTIMATE  I  &  II,
respectively. Further analyses of the ULTIMATE I & II studies including safety and secondary endpoints are being conducted
and detailed data is targeted to be presented in first half of 2021. Additionally, data from these studies are intended to support a
BLA submission for ublituximab in RMS targeted in mid-year 2021.

● ULTRA-V  Phase  2  Trial  Evaluating  U2  plus  Venetoclax  in  CLL:  ULTRA-V  is  a  Phase  2  open-label,  multicenter,
registration-directed clinical trial designed to investigate the efficacy and safety of U2 combined with venetoclax in subjects
with treatment-naïve and relapsed or refractory CLL. The primary endpoint for the Phase 2 component of this study is ORR and
Complete Response (CR) rate. The primary endpoints for this study are ORR and Complete Response (CR) rate.

CORPORATE INFORMATION

We  were  incorporated  in  Delaware  in  1993.  Our  executive  offices  are  located  at  2  Gansevoort  Street,  9th  Floor,  New  York,  New

York 10014. Our telephone number is 1-877-575-TGTX(8489), and our e-mail address is info@tgtxinc.com.

We  maintain  a  website  with  the  address  www.tgtherapeutics.com  and  maintain  various  social  media  accounts,  including  but  not
limited to Twitter and LinkedIn. We make available free of charge through our corporate website our annual reports on Form 10-K, quarterly
reports on Form 10-Q and current reports on Form 8-K, as well as any amendments to these reports, as soon as reasonably practicable after
we electronically file such material with, or furnish such material to, the SEC. We are not including the information on our website or our
social media accounts as a part of, nor incorporating either by reference into, this report. The SEC maintains a website that contains annual,
quarterly, and current reports, proxy statements, and other information that issuers (including us) file electronically with the SEC. The SEC’s
website address is http://www.sec.gov.

In  addition,  we  intend  to  use  our  corporate  website,  SEC  filings,  press  releases,  public  conference  calls  and  webcasts  as  well  as
social media to communicate with our subscribers and the public. It is possible that the information we post on social media could be deemed
to be material information. Therefore, in light of the SEC’s guidance, we encourage investors, the media and others interested in us to review
the information we post on the U.S. social media channels listed on our website.

STRATEGY

As a fully-integrated, commercial stage biopharmaceutical company focused on the acquisition, development and commercialization of novel
treatments for B-cell malignancies and autoimmune diseases, our key corporate objectives include:

● Successfully commercializing UKONIQ in the U.S. for relapsed or refractory MZL and FL;
● Completing U.S. regulatory submissions for U2 in CLL and ublituximab in MS;
● Obtaining FDA approval for U2 in CLL, and ublituximab in MS;
● Preparing for additional commercial launches and scaling commercialization capabilities to ensure, if approved, broad access to

patients for the approved indications for umbralisib and ublituximab;

● Developing U2 in NHL as well as in combination with other novel agents for CLL;

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● Advancing  cosibelimab  (TG-1501),  TG-1701,  and  TG-1801  through  clinical  development  and  defining  potential  regulatory

paths for these drug candidates either as single agents and in combination with umbralisib, ublituximab, and/or U2;

● Building upon the MS clinical program to develop ublituximab in additional MS indications and other autoimmune diseases;
● Continuing to expand our pipeline with mechanisms of importance to B-cell mediated diseases;
● Evaluating potential strategic collaborations to maximize the value of our programs and B-cell directed platform; and
● Maintaining our “patient first” culture as we grow our business.

Our Approach and Platform

Our  approach  to  drug  development  is  centered  on  developing  solutions  for  patients  rather  than  developing  single  therapies  for  a
disease. Our process begins by identifying validated targets against B-cell diseases, and then searching for and, ideally, acquiring what we
believe  to  be  “best-in-class”  compounds  with  complementary  mechanisms  against  these  targets,  with  the  goal  of  developing  multi-drug
proprietary targeted combinations, which can potentially offer new treatment options for patients in need.

Our  preference  is  to  identify  targets  for  which  there  is  human  clinical  proof  of  concept  that  the  mechanism  is  active  in  B-cell
diseases  and  then  to  identify  drug  candidates  that  effectively  modulate  the  desired  molecular  target.  We  identify  these  drug  candidates  at
academic centers of excellence or in development at biotech companies or pharmaceutical companies globally. Our current drug candidates
were  acquired  through  license  agreements,  collaborations,  or  joint  ventures  with  biopharmaceutical  companies  located  in  the  US,  France,
Switzerland, India, and China. This approach enables us to minimize target risk while looking for the best available drug candidates around
the world. By focusing on B-cell diseases and targets with a known activity profile, we believe that we can quickly identify the patients most
likely to respond, resulting in a more efficient development path with the potential for a greater likelihood of success. Importantly, since our
drug candidates have complementary mechanisms of action, we can rapidly explore combination therapies, which we believe is essential to
improving outcomes for patients and may hold the key to potentially identifying cures for patients with B-cell diseases.

Our approach is enabled by our clinical development platform which includes:

● An internal team with a deep understanding of B-cell diseases and significant experience successfully pioneering innovative

treatments for these complex diseases; and

● A vast external network of more than 350 community and academic clinical trial sites with significant experience researching

B-cell diseases.

B-CELL DISEASES OVERVIEW

The constellation of diseases that arise from abnormally growing or behaving B-cells is substantial. One group of diseases related to
abnormal  B-cell  growth  is  malignant  lymphomas,  including  NHL  and  CLL.  There  are  over  80  types  of  NHL,  approximately  40  to  50  of
which are due to malignant B-cells. These diseases can include some of the slowest and fastest growing cancers known to medicine. Some of
the more common B-cell malignancies include MZL, FL, SLL and CLL.

The other major group of diseases caused by abnormally functioning B-cells is autoimmune disorders. These diseases may result from
inappropriate  production  of  antibodies  from  the  B-cells.  These  antibodies  cannot  discriminate  “self”  from  “non-self,”  and  inadvertently
mount  a  disabling  immune  response  against  normal  organs.  Examples  of  common  and  very  debilitating  autoimmune  disorders  for  which
abnormally functioning B-cells have been implicated include MS and rheumatoid arthritis (RA). 

The Company’s current clinical programs are focused on MZL, FL, CLL and MS.

Marginal Zone Lymphoma Overview

MZL comprises a group of indolent (slow growing) mature B-cell non-Hodgkin lymphomas (NHLs). MZL is generally considered a
chronic and incurable disease. With an annual incidence of approximately 8,200 newly diagnosed patients in the United States MZL is the
third  most  common  B-cell  NHL,  accounting  for  approximately  ten  percent  of  all  NHL  cases.  MZL  consists  of  three  different  subtypes:
extranodal MZL of the mucosal-associated lymphoid tissue (MALT), nodal marginal zone lymphoma (NMZL), and splenic marginal zone
lymphoma (SMZL).

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Follicular Lymphoma Overview

FL  is  typically  an  indolent  form  of  NHL  that  arises  from  B-lymphocytes.  It  is  the  second  most  common  form  of  NHL.  FL  is
generally not curable and is considered a chronic disease, as patients can live for many years with this form of lymphoma. With an annual
incidence in the United States of approximately 13,200 newly diagnosed patients FL is the most common indolent lymphoma accounting for
approximately 17 percent of all NHL cases.

Chronic Lymphocytic Leukemia Overview

Chronic lymphocytic leukemia (CLL) is the most common type of adult leukemia. It is estimated there will be more than 20,000

new cases of CLL diagnosed in the United States in 2020 and approximately 45,000 new cases globally in 2020. Although signs and
symptoms of CLL may disappear for a period of time after initial treatment, the disease is considered incurable and many people will require
additional treatment due to the return of malignant cells.

Multiple Sclerosis Overview

Relapsing  multiple  sclerosis  (RMS)  is  a  chronic  demyelinating  disease  of  the  central  nervous  system  (CNS)  and  includes  people
with  relapsing-remitting  multiple  sclerosis  (RRMS)  and  people  with  secondary  progressive  multiple  sclerosis  (SPMS)  who  continue  to
experience relapses. RRMS is the most common form of multiple sclerosis (MS) and is characterized by episodes of new or worsening signs
or symptoms (relapses) followed by periods of recovery. It is estimated that nearly 1 million people are living with MS in the United States
and approximately 85% are initially diagnosed with RRMS. The majority of people who are diagnosed with RRMS will eventually transition
to SPMS, in which they experience steadily worsening disability over time. Worldwide, more than 2.3 million people have a diagnosis of MS.

OUR PRODUCTS UNDER DEVELOPMENT

We have leveraged our B-cell platform to develop a robust drug pipeline of both targeted orally available, potent and selective small
molecule kinase inhibitors and intravenously delivered “off-the-shelf” immunotherapies that leverage the patient’s own immune system to
fight cancer. We currently license worldwide development and commercial rights, subject to certain limited geographical restrictions, to all of
our pre-clinical and clinical programs. The following table summarizes our most advanced drug candidates as of February 2021.

Clinical Drug Candidate
(molecular target)
Ublituximab (anti-CD20/mAb)

Umbralisib  (PI3K  delta  and  CK1  epsilon
inhibitor)

Cosibelimab (anti-PDL1)
TG-1701 (BTK inhibitor)
TG-1801 (anti-CD47/CD19)

Initial Target Disease

Chronic Lymphocytic Leukemia
Multiple Sclerosis
Chronic Lymphocytic Leukemia
Marginal Zone Lymphoma
Follicular Lymphoma
B-cell Cancers
B-cell Cancers
B-cell Cancers

Stage of Development
(pivotal study)
Phase 3 trial (UNITY-CLL)
Phase 3 trials (ULTIMATE I and II)
Phase 3 trial (UNITY-CLL)
Phase 2b trial (UNITY-NHL)
Phase 2b trial (UNITY-NHL)
Phase 1 trial
Phase 1 trial 
Phase 1 trial

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Ublituximab Overview

Ublituximab is an investigational glycoengineered monoclonal antibody that targets a unique epitope on CD20-expressing B-cells.
When  ublituximab  binds  to  the  B-cell  it  triggers  a  series  of  immunological  reactions  (including  antibody-dependent  cellular  cytotoxicity
(ADCC) and complement dependent cytotoxicity (CDC), leading to destruction of the cell. Additionally, ublituximab is uniquely designed to
lack certain sugar molecules normally expressed on the antibody. Removal of these sugar molecules, a process called glycoengineering, has
been shown to enhance the potency of ublituximab, especially the ADCC activity.

Targeting  CD20  using  monoclonal  antibodies  has  proven  to  be  an  important  therapeutic  approach  for  the  management  of  B-cell

malignancies and autoimmune disorders, both diseases driven by the abnormal growth or function of B-cells.

Ublituximab is being evaluated in pivotal and early phase clinical trials for patients with NHL, CLL, and RMS.   In December 2020,
we announced initiation of a rolling BLA submission of ublituximab in combination with umbralisib for the treatment of CLL based on the
results of the UNITY-CLL Phase 3 trial.

Umbralisib - UKONIQ Overview

Umbralisib is an oral inhibitor of PI3K-delta and CK1-epsilon administered once daily. The phosphoinositide-3-kinases (PI3Ks) are
a family of enzymes involved in many important cellular functions, including cell proliferation and survival, cell differentiation, intracellular
trafficking, and immunity.

There are 4 isoforms of PI3K (alpha, beta, delta, and gamma), of which the delta isoform is highly expressed in hematopoietic cells
and malignant lymphoid diseases. Dysregulation of the PI3K pathway is among one of the most commonly mutated pathways across all of
cancer  biology.    Umbralisib  is  highly  selective  for  the  delta  isoform  of  PI3K  and  has  limited  to  no  impact  on  the  other  PI3K  isoforms.
Umbralisib  also  inhibits  casein  kinase  1  epsilon  (CK1-epsilon).  CK1-epsilon  is  a  major  regulator  of  oncoprotein  translation,  which  drives
growth  and  survival  of  lymphoma  cells,  including  c-Myc.  A  manuscript  titled,  "Silencing  c-Myc  Translation  as  a  Therapeutic  Strategy
through  Targeting  PI3K  Delta  and  CK1  Epsilon  in  Hematological  Malignancies,"  was  published  in  the  First  Edition  section  of  Blood,  the
Journal of the American Society of Hematology. Importantly, the manuscript for the first time reported on umbralisib’s unique complimentary
mechanism of inhibiting the protein kinase casein kinase-1 epsilon (CK1e), which may lead to a differentiated safety profile by supporting T
regulatory cells, a part of the immune system necessary to protect against autoimmune mediated toxicities.

We  are  commercializing  umbralisib  in  the  U.S.  for  the  treatment  of  relapsed  or  refractory  MZL  and  FL  under  the  brand  name
UKONIQ.   In February 2021, we obtained accelerated approval of UKONIQ by the FDA for the treatment of adult patients with relapsed or
refractory  MZL  who  have  received  at  least  1  prior  anti-CD20-based  regimen  and  adult  patients  with  relapsed  or  refractory  FL  who  have
received at least 3 prior lines of systemic therapy.  Both indications were approved based on overall response rate observed in the UNITY-
NHL trial.  Continued approval for these indications may be contingent upon verification and description of clinical benefit in a confirmatory
trial.    In  December  2020,  we  announced  initiation  of  a  rolling  BLA  submission  of  umbralisib  in  combination  with  ublituximab  for  the
treatment  of  CLL  based  on  the  results  of  the  UNITY-CLL  trial.    In  addition,  we  are  studying  umbralisib  in  combination  regimens  with
ublituximab and other treatments, including venetoclax and TG-1701, our investigational Bruton's tyrosine kinase (BTK) inhibitor.

Early Clinical Development of Ublituximab and Umbralisib

Single Agent Ublituximab (TG-1101) in Relapsed/Refractory NHL & CLL

In February 2017, data from the Phase 1/2 trial of ublituximab (TG-1101) were published in the British Journal of Haematology in a 

manuscript titled “A phase 1/2 trial of ublituximab, a novel, glycoengineered anti-CD20 monoclonal antibody, in patients with B-cell non-
Hodgkin lymphoma or chronic lymphocytic leukemia previously exposed to rituximab”.   

Single Agent Ublituximab (TG-1101) in Relapsing Forms of Multiple Sclerosis

In May 2016, we commenced our first study of ublituximab in patients with RMS, a chronic demyelinating disease of the CNS. The
study, entitled "A Placebo-Controlled Multi-Center Phase 2 Dose Finding Study of Ublituximab, a Third-Generation Anti-CD20 Monoclonal
Antibody,  in  Patients  with  Relapsing  Forms  of  Multiple  Sclerosis,"  was  led  by  Edward  Fox,  MD,  PhD,  Director  of  the  Multiple  Sclerosis
Clinic of Central Texas and Clinical Associate Professor at the University of Texas Dell Medical School in Austin, TX. The

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primary objective of the study was to determine the optimal dosing regimen for ublituximab with a focus on accelerating infusion times. In
addition  to  monitoring  for  safety  and  tolerability  at  each  dosing  cohort,  B-cell  depletion  and  established  MS  efficacy  endpoints  were  also
evaluated.

In October 2018, final data from this Phase 2 study were presented at the 34th Congress of the European Committee for Treatment
and Research in Multiple Sclerosis (ECTRIMS) meeting in Berlin, Germany. The presentation included final data on all 48 patients enrolled
in the study through 48 weeks of treatment. Ublituximab was well tolerated across all patients including those receiving rapid infusions, as
low as a one hour for the 450mg dose currently being studied in the Phase 3 ULTIMATE program and no study drug related discontinuations
occurred.  Median  B  cell  depletion  was  >99%  at  the  primary  analysis  point  of  Week  4  (n=48)  and  maintained  at  Week  24  and  Week  48.
Ublituximab also completely eliminated all (100%) T1 Gd-enhancing lesions at Week 24 and maintained complete elimination at Week 48
(n=46) and an ARR of 0.07 was observed with 93% of subjects relapse free at Week 48.

In October of 2019, at the 35th Congress of the ECTRIMS meeting in Stockholm, Sweden, we re-presented the final 48-week data
from the Phase 2 trial, and also presented long-term follow-up data for 45 patients from the Phase 2 trial that enrolled into the Open Label
Extension  (OLE)  trial.  With  a  median  duration  of  follow-up  of  124.7  weeks,  ublituximab  continued  to  be  well  tolerated,  no  subjects
discontinued due to an adverse event (AE) related to ublituximab, and AEs deemed at least possibly related to ublituximab were infrequent
with  all  patients  dosed  at  450mg  administered  in  a  one-hour  infusion.  Additionally,  infusion  related  reactions  (IRRs)  were  rare  during  the
OLE, occurring in only 5 patients (11%) all Grade 1 or 2.

Single Agent Umbralisib (TGR-1202) in Patients with Relapsed/Refractory Hematologic Malignancies

In  February  2018,  data  from  this  first-in-human  Phase  1  clinical  trial  of  umbralisib  was  published  in  The  Lancet  Oncology.  The
manuscript  was  titled,  “Umbralisib,  a  novel  PI3K  and  casein  kinase-1  epsilon  inhibitor,  in  relapsed  or  refractory  chronic  lymphocytic
leukemia and lymphoma: an open-label, phase 1, dose-escalation, first-in-human study.”

In addition to the above Phase 1 trials for ublituximab and umbralisib, the following Phase 1 and Phase 2 studies were conducted:

● Phase 1/2 Study of Umbralisib, Ublituximab and Venetoclax in patients with relapsed or refractory CLL – In December
2020, we presented data from patients with relapsed/refractory CLL treated with the triple therapy combination of ublituximab,
umbralisib and venetoclax during the 62nd ASH annual meeting and exposition. At the time of presentation, 43 patients were
evaluable for safety and 29 were evaluable for efficacy. The triple therapy regimen was administered with 3 cycles of U2 as
induction in cycles 1 through 3, U2 plus venetoclax in cycles 4,5 and 6, followed by umbralisib plus venetoclax in cycles 7
through 12 in patients with R/R CLL. Patients with centrally confirmed undetectable minimal residual disease (uMRD) in the
bone  marrow  after  cycle  12  were  permitted  to  stop  all  therapy,  while  MRD  detectable  patients  continued  on  single  agent
umbralisib. Among evaluable patients, ORR was 77% (30/39) after cycle 3 (U2 only), 100% (31/31) after cycle 7, and 100%
(27/27) after cycle 12. Among the 27 patients who finished 12 cycles of therapy, 41% achieved a complete response (CR) by
iwCLL  criteria,  96%  achieved  undetectable  MRD  in  the  peripheral  blood  and  77%  achieved  undetectable  MRD  in  the  bone
marrow.  At  a  median  follow  up  of  15.6  months  (n=43),  only  1  patient  has  progressed,  occurring  10  months  after  stopping
treatment  in  cycle  12.  Grade  3/4  adverse  events  occurring  in  >  5%  of  patients  were  neutropenia  (21%),  leukopenia  (12%),
infusion  related  reactions  (7%),  anemia  (5%),  and  diarrhea  (5%).  No  TLS  events  were  observed  during  venetoclax
administration, with one TLS event occurring prior to venetoclax administration.  

● Phase 1 Study of TG-1701, a Once-Daily BTK inhibitor, as a Single Agent and in Triple Combination with Umbralisib
and  Ublituximab  in  patients  with  relapsed  or  refractory  NHL  and  CLL  –  In  December  2020,  we  presented  data  from
patients with relapsed/refractory NHL and CLL treated with TG-1701 monotherapy and the triple therapy combination of TG-
1701, umbralisib and ublituximab during the 62nd ASH annual meeting and exposition. A total of 102 patients with R/R CLL
or b-cell lymphoma have been treated with TG-1701, with patients receiving monotherapy in the dose-escalation cohort (n=25)
or in the 200 mg dose-expansion cohort (n=61), or TG-1701 in combination with U2 in the dose escalation cohort (n=16). TG-
1701  monotherapy  was  well  tolerated  and  the  maximum  tolerated  dose  was  not  reached  up  through  400  mg  QD.  Grade  3/4
adverse events (AE) occurring in >10% of patients treated with TG-1701 monotherapy were limited and included ALT increase
(12%), all of which were patients treated with 400 mg QD. At the target single-agent Phase 2 dose of 200mg (QD) (n=61), AEs
of  special  interest  included  Grade  3  hypertension  (1.6%),  atrial  fibrillation  (1.6%),  and  no  instances  of  major  bleeding
observed. Grade 3/4 AEs occurring in >10% of patients treated with U2+1701 were ALT increase (25%), AST increase (19%)
and neutropenia (12%). At a median follow up of 7 months in the 200 mg QD monotherapy expansion cohorts, preliminary

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overall  response  rates  (ORR)  were:  95%  (19/20)  in  CLL,  50%  (6/12)  in  mantle  cell  lymphoma  (MCL),  and  95%  (18/19)  in
Waldenstrom  macroglobulinemia  (WM).  At  a  median  follow  up  of  12  months,  the  1701+U2  dose  escalation  (using  doses  of
100mg to 300 mg QD of TG-1701) resulted in 79% ORR, with 22% CR rate across patients with WM, CLL, MZL, diffuse
large B-cell lymphoma (DLBCL) and FL (n=14).

● Ublituximab in Combination with Umbralisib with/without ibrutinib or bendamustine for Relapsed/Refractory NHL &
CLL— In November 2013, we initiated a multi-center, Phase I study to evaluate the safety and efficacy of the combination of
U2, for patients with relapsed and/or refractory CLL and NHL. The MD Anderson Cancer Center was the lead center for this
clinical trial. Additional cohorts were added to this study to explore the triple therapy combination of U2 plus ibrutinib and the
triple therapy combination of U2 plus bendamustine. Both U2 and the triplet combinations demonstrated acceptable levels of
tolerability with promising activity. Data highlights include the following:

o Ublituximab plus Umbralisib (U2):

◾ In September of 2019, results from the Phase I/IB combination trial of U2 were published in Blood, the Journal of the
American Society of Hematology in a manuscript titled, “Ublituximab and Umbralisib in Relapsed/ Refractory B-cell
Non-Hodgkin Lymphoma and Chronic Lymphocytic Leukemia”. The paper includes safety and efficacy information
from  22  patients  with  CLL  or  SLL  and  53  patients  with  NHL  treated  with  the  combination  of  U2.  Safety  data  was
available  from  all  75  patients  and  demonstrated  that  the  U2  combination  was  well  tolerated  with  the  majority  of
adverse events (AEs) being grade 1 or 2 in severity and no maximum tolerated dose achieved in either CLL or NHL.
Importantly,  U2  exhibited  low  rates  of  immune-mediated  toxicities,  typically  associated  with  other  PI3K-delta
inhibitors including colitis, pneumonia/pneumonitis, or hepatic toxicity, and discontinuations due to AEs were limited
(13%).Efficacy  data  was  available  from  69  patients  and  showed  the  combination  to  be  highly  active  with  a  72.5%
clinical benefit rate (defined as patients obtaining a Complete Response, Partial Response, or Stable Disease) across
all subtypes of B-cell cancers enrolled in the study. Of note, a median PFS of 27.57 months was observed in patients
with relapsed/refractory CLL (n=15) treated at therapeutic dose levels of umbralisib and a 65% ORR was observed in
patients relapsed/refractory indolent NHL (n=20), including a 100% ORR amongst MZL patients (n=5).

o U2 plus Bendamustine: In December 2018, updated data for the U2 plus bendamustine cohort was presented at the 60th
ASH  Annual  Meeting.  Overall,  the  U2  plus  bendamustine  combination  was  well  tolerated  and  highly  active  in  patients
with advanced indolent and aggressive NHL, including those not eligible for HD/SCT or CD19 CART therapy. Efficacy
highlights  from  this  poster  included  an  85%  (11  of  13)  ORR  including  a  54%  CR  rate  in  patients  with  relapsed  or
refractory FL.

o U2  plus  Ibrutinib:  In  January  2019,  we  announced  the  publication  of  results  from  the  U2  plus  ibrutinib  cohort  in  The
Lancet Haematology in a manuscript titled, “Tolerability and activity of ublituximab, umbralisib, and ibrutinib in patients
with chronic lymphocytic leukemia and non-Hodgkin lymphoma: a phase 1 dose escalation and expansion trial”. Safety
data was available from 46 patients and the triple combination of ublituximab, umbralisib, and ibrutinib was well tolerated
with a manageable adverse event profile and no maximum tolerated dose achieved for the combination. Efficacy data was
available  from  44  patients  and  showed  the  U2  plus  ibrutinib  combination  to  be  highly  active.  The  ORR  amongst  all
evaluable  patients  was  84%,  with  100%  (22  of  22)  of  patients  with  CLL/SLL  achieving  a  response,  including  36%
achieving a CR. Among patients with NHL, 68% (15 of 22) achieved a response, including a 71% ORR in FL (n=7), a
100% ORR in MZL (n=3), and a 100% ORR in MCL (n=6).

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● Umbralisib as a single agent in CLL patients who are intolerant to prior BTK inhibitor or PI3K delta inhibitor therapy
— In December 2020, we announced the publication of results from 51 patients with CLL who were intolerant to prior BTK or
PI3K delta inhibitor therapy who were then treated with single agent umbralisib in Blood, the Journal of the American Society
of  Hematology.  Umbralisib  demonstrated  a  favorable  safety  profile  with  only  12%  of  patients  discontinuing  due  to  an
umbralisib  related  adverse  event,  of  which  only  one  patient  discontinued  due  to  a  recurrent  AE  also  experienced  with  prior
kinase inhibitor therapy. Most common (≥5%) grade ≥3 AEs on umbralisib (all causality) were neutropenia (18%), leukocytosis
(14%), thrombocytopenia (12%), pneumonia (12%), and diarrhea (8%). As of the data presentation, over half of the patients
enrolled had been on umbralisib for a duration longer than their prior kinase inhibitor. The estimated median progression free
survival  (PFS)  was  23.5  months  (95%  confidence  interval:  13.1  –  Not  Estimable).  Enrollment  is  now  closed  with  patients
continuing to be followed. In December 2020, data from this trial was described further in the manuscript entitled, “Phase 2
Study of the Safety and Efficacy of Umbralisib in Patients with CLL Who Are Intolerant to BTK or PI3Kδ Inhibitor Therapy,”
which was published online in the First Edition section of Blood, the Journal of the American Society of Haematology.

● Phase 2 trial of Umbralisib plus Ibrutinib in patients with relapsed or refractory CLL and MCL— In December 2018,
we announced the publication of results from the multicenter Phase 1/1b trial of umbralisib in combination with ibrutinib, the
oral BTK inhibitor, in Lancet Haematology. This investigator-initiated trial was conducted at Dana-Farber Cancer Institute and
four  additional  centers  across  the  USA  in  collaboration  with  the  Leukemia  and  Lymphoma  Society,  Blood  Cancer  Research
Partnership  with  funding  by  TG  Therapeutics.  The  publication  includes  safety  and  efficacy  information  from  a  total  of  42
relapsed or refractory patients, 21 with CLL and 21 with MCL. In this study, the combination of umbralisib and ibrutinib was
well tolerated and consistent with the additive toxicity profile of the two drugs individually. No dose-limiting toxicities were
observed, and the maximum-tolerated dose of umbralisib when combined with ibrutinib was not reached. The recommended
phase  2  dose  of  umbralisib  when  given  in  combination  with  ibrutinib  was  800  mg  once  daily.  Importantly,  serious  immune-
mediated toxicities were not observed with this combination, as had previously been reported with combinations of different
agents targeting this pathway, with only one case of transient Grade 3 transaminitis and no Grade 3/4 colitis or pneumonitis.
The combination of umbralisib and ibrutinib was also clinically active, with 90% of relapsed/refractory CLL patients achieving
an overall response (n=19), of which 62% (n=13) achieved a partial response or partial response with lymphocytosis, and 29%
(n=6) achieved a complete response. Of the 21 patients treated with MCL, 67% (n=14) achieved an overall response, of which
48% (n=10) achieved a partial response and 19% (n=4) achieved a complete response. In June 2020, updated long term data
from this trial were presented at the 25th European Hematology Association (EHA) Annual Congress. As of the updated data
cutoff, 42 patients were evaluable for safety and efficacy (21 CLL patients and 21 MCL patients). With long term follow up
(median  follow-up  of  43.5  months  (range  8.4-61),  there  were  no  cumulative  or  recurrent  late  onset  toxicities  observed.  In
relapsed/refractory  CLL,  the  overall  response  rate  was  95%  including  a  29%  complete  response  (CR)  rate,  and  the  4-year
Progression-free Survival (PFS) and Overall Survival (OS) were 78% and 90%, respectively. In relapsed/refractory MCL, the
ORR was 71% with a 24% CR rate, and median PFS and OS were 10.8 and 30.7 months, respectively.

● Phase  2  trial  of  Ublituximab  plus  Ibrutinib  in  patients  with  relapsed  or  refractory  CLL  and  Mantle  Cell  Lymphoma
(MCL)—  In  December  2013,  we  initiated  a  multi-center  Phase  2  clinical  trial  to  evaluate  the  safety  and  efficacy  of  the
combination of ublituximab and ibrutinib for patients with CLL and MCL. Jeff P. Sharman, MD, Medical Director, Hematology
Research, US Oncology Network, was the Study Chair. This trial has completed enrollment. Final data from the MCL cohort of
this  study  was  presented  at  the  57th  ASH  meeting  held  in  December  2015,  with  data  from  the  CLL  cohort  published  in  the
British  Journal  of  Haematology  in  December  2016.  The  combination  displayed  marked  clinical  activity,  reporting  an  88%
(35/41) response rate in patients with CLL, a 95% (19/21) response rate in those CLL patients with high-risk cytogenetics, and
an 87% (13/15) response rate in patients with MCL.

● Additional  early  combination  studies  utilizing  umbralisib  with  approved  agents—  Umbralisib  has  been  evaluated  in
combination with the anti-CD30 antibody drug conjugate, brentuximab vedotin, in patients with relapsed or refractory Hodgkin
lymphoma  and  in  combination  with  the  JAK  inhibitor,  ruxolitinib,  in  patients  with  Myelofibrosis  or  Polycythemia  Vera.
Additional  investigator  sponsored  trials  are  also  underway  which  are  combining  umbralisib  and  or  the  U2  combination  with
other approved agents for the treatment of B-cell malignancies.

Current Phase 3 or Registration Directed Clinical Trials for Ublituximab and Umbralisib:

We have initiated and enrolled several Phase 3 and registration-directed Phase 2b clinical trials (i.e., clinical trials that may support a

marketing application for approval). The following are the current Phase 3 trials and registration-directed Phase 2b clinical trials:

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UNITY-NHL Phase 2b Trial: UNITY-NHL is a broad, multicenter, open-label, Phase 2b registration-directed clinical trial designed
to evaluate the efficacy and safety of umbralisib monotherapy and U2 combinations in patients with previously treated NHL. The marginal
zone lymphoma (MZL) and the follicular lymphoma (FL)/small lymphocytic lymphoma (SLL) single agent umbralisib cohorts of this trial
are fully enrolled. These indolent lymphoma cohorts of the trial are being led by Nathan H. Fowler, MD, Associate Professor, Department of
Lymphoma/Myeloma at the University of Texas MD Anderson Cancer Center. The primary objective of these cohorts is to assess the efficacy
of single agent umbralisib as measured by Overall Response Rate (ORR).

● UNITY-NHL MZL Single Agent Umbralisib Cohort: The MZL cohort enrolled adult patients who had at least one prior line
of therapy that included an anti-CD20 monoclonal antibody. This cohort was designed to evaluate the safety and efficacy of
single agent umbralisib and the primary endpoint is ORR as determined by Independent Review Committee (IRC) assessment.
Secondary endpoints include safety, duration of response, and progression-free survival (PFS). 

In  January  2019,  the  U.S.  Food  and  Drug  Administration  (FDA)  granted  Breakthrough  Therapy  Designation  (BTD)  to
umbralisib for the treatment of adult patients with MZL who have received at least one prior anti-CD20 regimen. The BTD was
based on interim data from the MZL cohort of the UNITY-NHL trial. In April 2019, the FDA granted orphan drug designation
to umbralisib for the treatment of patients with any of the three types of marginal zone lymphoma (MZL): nodal, extranodal,
and splenic MZL.

In  December  2020,  at  the  American  Society  of  Hematology  Annual  meeting  results  from  the  MZL  and  FL/SLL  umbralisib
monotherapy cohorts of the UNITY-NHL were presented.

● UNITY-NHL FL/SLL Single Agent Umbralisib Cohort: The FL/SLL cohort enrolled adult patients who had two or more
prior lines of therapy that included an anti-CD20 monoclonal antibody and an alkylating agent. In October 2019, we announced
that  the  FL  patients  within  this  cohort  met  the  primary  endpoint  of  ORR  as  determined  by  Independent  Review  Committee
(IRC) for all treated follicular lymphoma patients (n=118). In March 2020, the US FDA granted orphan drug designation to
umbralisib, for the treatment of patients with FL. As noted above, in December 2020, at the ASH meeting results from the MZL
and FL/SLL umbralisib monotherapy cohorts of the UNITY-NHL were presented.

● UKONIQ  Approval:  On  February  5,  2021,  we  announced  the  US  FDA  granted  accelerated  approval  of  umbralisib,  now
referred  to  as  UKONIQ,  for  the  treatment  of  adult  patients  with  relapsed  or  refractory  MZL  who  have  received  at  least  one
prior anti-CD20 based regimen and adult patients with relapsed or refractory FL who have received at least three prior lines of
systemic therapy. Accelerated approval was granted for these indications based on overall response rate (ORR) data from the
Phase 2 UNITY-NHL Trial (NCT02793583). Continued approval for these indications may be contingent upon verification and
description of clinical benefit in a confirmatory trial. 

● UNITY-NHL Additional Cohorts: There are additional exploratory cohorts of the UNITY-NHL trial focused on Diffuse Large
B-Cell Lymphoma (DLBCL) and Mantle Cell Lymphoma (MCL). In total, there are currently four cohorts in the UNITY-NHL
trial including, MZL, FL/SLL, DLBCL, and MCL. Each cohort is enrolled and evaluated separately from the others.

UNITY-CLL  Phase  3  Trial  Evaluating  Umbralisib  plus  Ublituximab  (U2):  UNITY-CLL  is  a  global  Phase  3  randomized
controlled clinical trial that includes two key objectives: first, to demonstrate contribution of each agent in the ublituximab plus umbralisib
regimen (the combination sometimes referred to as "U2"), and second, to demonstrate superiority in PFS over the standard of care to support
the submission for full approval of the combination. The study randomized patients into four treatment arms: ublituximab plus umbralisib,
ublituximab alone, umbralisib alone, and an active control arm of obinutuzumab plus chlorambucil. The primary endpoint for this study is
progression free survival (PFS) which we intend to use to support a submission for approval of the U2 combination in CLL. The UNITY-
CLL trial is being led by John Gribben, MD, professor of Medical Oncology, Barts Cancer Institute, United Kingdom. The study completed
enrollment in October 2017 with over 600 patients across the four treatment arms, with approximately 420 patients in the U2 arm and the
active control arm combined.

In  September  2015,  we  reached  an  agreement  with  the  FDA  regarding  a  SPA  on  the  design,  endpoints,  and  statistical  analysis
approach of the UNITY-CLL Phase 3 trial. The SPA provides agreement that the Phase 3 trial design adequately addresses objectives that, if
met, would support the regulatory submission for drug approval of both ublituximab and umbralisib in combination.

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In  May  2017,  a  pre-specified  interim  analysis  was  conducted  to  assess  contribution  of  each  single  agent  in  the  ublituximab  plus
umbralisib combination regimen, which allowed for the early termination of both single agent arms. A second interim analysis was planned
to evaluate ORR to support accelerated approval when all patients in the U2 arm and the active control arm had at least 6 months of follow-
up. In September 2018, we announced that the independent Data Safety Monitoring Board (DSMB) reviewed ongoing data from the trial and
advised us that the second interim analysis of ORR could not be conducted at that time as the data were not sufficiently mature to conduct the
analysis.  Given  the  uncertainty  surrounding  the  timing  and  outcome  of  the  ORR  analysis,  as  well  as  the  significant  regulatory  hurdles
associated  with  accelerated  approval  in  CLL,  we  decided  to  continue  to  conduct  the  trial  under  the  SPA  and  seek  full  approval  for  U2  in
patients with CLL based on the PFS endpoint, if positive.

In  May  2020,  we  announced  the  UNITY-CLL  trial  met  the  primary  endpoint  of  improved  PFS  (p<.0001)  and  the  trial  would  be

stopped early for superior efficacy observed at the interim analysis.  

In October 2020, we announced the US FDA granted Fast Track designation to the combination of ublituximab and umbralisib for
the  treatment  of  adult  patients  with  CLL.  The  US  FDA  previously  granted  Orphan  Drug  Designation  (ODD)  covering  ublituximab  in
combination with umbralisib for the treatment of CLL.

On  December  1,  2020,  we  initiated  a  rolling  submission  of  a  BLA  to  the  US  FDA  requesting  approval  of  ublituximab,  in
combination with umbralisib, as a treatment for patients with CLL, with completion of the rolling submission for the BLA expected in the
first half of 2021.

On  December  7,  2020,  we  presented  safety  and  efficacy  results  from  the  UNITY-  CLL  trial  at  the  ASH  annual  meeting,
demonstrating that U2 significantly improved PFS over obinutuzumab plus chlorambucil (HR=0.54, p<0.0001) as well as ORR (p<0.001) in
patients with CLL; with consistent PFS improvement across treatment naïve CLL (HR=0.48) and relapsed/refractory CLL (HR=0.60). Grade
3/4 Adverse Events (AEs) of clinical interest (U2 vs O+Chl) included elevated ALT (8.3% vs 1.0%), elevated AST (5.3% vs 2.0%), non-
infectious  colitis  (1.9%  vs  0%),  infectious  colitis  (0.5%  vs  0.5%),  pneumonitis  (0.5%  vs  0%),  rash  (2.4%  vs  0.5%),  and  opportunistic
infections (5.8% vs. 1.5%).

GENUINE Phase 3 Trial Evaluating Ublituximab plus Ibrutinib: GENUINE is a randomized controlled clinical trial evaluating
patients with previously treated CLL with specific high-risk cytogenetic abnormalities. Patients in this trial were randomized to receive either
ublituximab plus ibrutinib or ibrutinib alone. In February 2021, final results from this trial were published in The Lancet Haematology, in a
manuscript  titled,  “A  Phase  3,  Randomized  Trial  of  Ublituximab  Plus  Ibrutinib  for  Patients  With  Relapsed/Refractory  High-Risk  Chronic
Lymphocytic Leukemia”.

ULTIMATE I & II Trials Evaluating Single Agent Ublituximab in RMS: ULTIMATE I and ULTIMATE II are two independent
Phase  3  trials.  Each  trial  is  a  global,  randomized,  multi-center,  double-blinded,  double-dummy,  active-controlled  study  comparing
ublituximab to teriflunomide in subjects with RMS. The primary endpoint for each study is ARR following 96 weeks of treatment which we
intend  to  use  to  support  a  submission  for  approval  of  ublituximab  in  RMS.  Each  trial  was  designed  to  enroll  approximately  440  subjects,
randomized  in  a  1:1  ratio.    This  program  is  being  led  by  Lawrence  Steinman,  MD,  George  A.  Zimmermann  Professor  and  Professor  of
Pediatrics, Neurology and Neurological Sciences at Stanford University.

In August 2017, we reached an agreement with the FDA regarding an SPA on the design of the ULTIMATE I and ULTIMATE II
trials, for the treatment of RMS.  The SPA provides agreement that the two Phase 3 trial designs adequately address objectives that, if met,
would support the regulatory submission for approval of ublituximab in RMS.

In  August  2018,  we  announced  that  target  enrollment  into  the  ULTIMATE  I  and  II  trials  had  been  achieved,  and  that  enrollment
would continue into September 2018 to allow identified patients to participate in the study. At completion of full enrollment in October of
2018, approximately 1,100 subjects were enrolled in both studies combined.

In  October  2019,  at  the  35th  Congress  of  ECTRIMS,  we  presented  the  ULTIMATE  I  &  II  Phase  3  program  trial  design  and

demographic data. The presentation concluded that patient baseline characteristics were consistent with a typical RMS population.

In December 2020, we announced positive topline results from the ULTIMATE I & II trials. Both studies met their primary endpoint

of significantly reducing ARR (p<0.005 in each study) with ublituximab demonstrating an ARR of <0.10 in each of the studies. Relative

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reductions of approximately 60% and 50% in ARR over teriflunomide were observed in ULTIMATE I & II, respectively. Further analyses of
the ULTIMATE I & II studies including safety and secondary endpoints are being conducted and detailed data is targeted to be presented in
first half of 2021. Additionally, data from these studies are intended to support a BLA submission for ublituximab in RMS targeted in mid-
year 2021.

ULTRA-V Phase 2 Trial Evaluating U2 plus Venetoclax in CLL: ULTRA-V is a Phase 2 open-label, multicenter, registration-
directed clinical trial designed to investigate the efficacy and safety of U2 combined with venetoclax in subjects with treatment naïve and
relapsed or refractory CLL. The primary endpoints for this trial are ORR and CR rate.

Early Pipeline Overview and Clinical Development

Cosibelimab (anti-PD-L1 monoclonal antibody) Overview

Cosibelimab (also referred to as TG-1501) is a fully human monoclonal antibody of IgG1 subtype that binds to Programmed Death-
Ligand  1  (PD-L1)  and  blocks  its  interactions  with  PD-1  and  B7.1  receptors.  Cancer  cells  elude  anti-tumor  immunity  through  multiple
mechanisms, including upregulated expression of ligands for inhibitory immune checkpoint receptors. Signals from PD-L1 on tumor cells
and  in  the  tumor  microenvironment  help  those  tumors  avoid  immune  attack  and  elimination  by  preventing  activation  of  tumor  specific
effector T-cells. Anti-PD-L1 antibodies are designed to block that signal, permitting effector T-cells to attack the cancer. Clinical studies have
shown  that  blockade  of  the  PD-1/PD-L1  pathway  by  monoclonal  antibodies  can  enhance  the  immune  response  and  result  in  anti-tumor
activity.

Preclinically, it has been shown that the effects of anti-PD-L1 intervention can be enhanced by utilizing other mechanisms targeting
the  tumor  microenvironment.  Combining  immunotherapies  like  anti-PD-L1,  which  counters  the  tumor's  immune-evading  defense  system
with other anti-cancer agents such as ublituximab or umbralisib, may better engage the body's own immune system to help fight cancer.

A  comprehensive  array  of  in  vitro  biochemical  and  cellular  assays  was  established  to  characterize  the  binding  and  the  functional
activities of cosibelimab. The in vitro data demonstrated that the affinity, PD-L1 binding capability, relative ability to inhibit PD-1/PDL-1
interactions, and functional activity of cosibelimab in cellular assays are comparable to those of atezolizumab, durvalumab and avelumab -
the currently approved products sharing the same mechanism of action.

Cosibelimab  is  currently  being  evaluated  in  an  ongoing  study  (Study  CK-301-101:  NCT03212404),  enrolling  patients  with  select
solid tumors, being conducted by our licensor. In the dose escalation portion of this trial, doses ranging from 200mg to 800mg were tested
with no dose-limiting toxicities observed and no maximum tolerated dose (MTD) was achieved; therefore, a fixed dose of 800 mg was the
selected starting dose of cosibelimab for patients with hematologic malignancies.

In December 2018, the FDA approved an IND for cosibelimab and a Phase 1 study in subjects with select subtypes of lymphoma
commenced  in  2019,  as  did  a  study  of  cosibelimab  in  combination  with  ublituximab  and/or  umbralisib.  Based  on  our  rapidly  evolving
understanding of the pathobiology of lymphoma subtypes, we envision further combinations with other immunotherapies in the future.

TG-1701 (BTK inhibitor) Overview

TG-1701 is a novel, orally available and covalently-bound Bruton’s tyrosine kinase (BTK) inhibitor that exhibits superior selectivity

to BTK compared to ibrutinib in in vitro kinase screening.

B-cell receptor (BCR) signaling is crucial for normal B-cell development and supports the survival and growth of malignant B-cells
in  patients  with  B-cell  leukemias  or  lymphomas.  Targeting  BTK,  an  essential  element  of  BCR  signaling  pathway  which  regulates  the
survival, activation, proliferation, and differentiation of B lymphocytes, has shown remarkable efficacy with an acceptable safety profile in B-
cell malignancies.           

In June 2018, pre-clinical data for TG-1701 demonstrating favorable pharmacologic properties was presented at the 23rd Congress
of the European Hematology Association (EHA) in Stockholm, Sweden. In vitro pharmacology studies have revealed that TG-1701 inhibited
BTK with greater than 10-fold selectivity as measured by IC50 on the kinase activities of EGFR, ITK, TXK, JAK3, HER2 and HER4. In vivo
pharmacology  studies  showed  that  TG-1701  significantly  inhibited  the  growth  of  xenograft  lymphoid  tumors  including  OCI-LY-10  and
DOHH-2 in nude mice.

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We are currently evaluating TG-1701 in a Phase 1, multi-center, dose-escalation clinical trial in patients with B-cell malignancies.
This trial is designed to evaluate the safety and tolerability of TG-1701 alone and in combination with U2 in adults with B-cell malignancies
and determine the recommended Phase 2 dose. Key secondary objectives include evaluation of pharmacokinetics (PK), pharmacodynamics,
and preliminary anticancer activity.  Preliminary data from this Phase 1 study was presented at ASH 2020 (described above).

TG-1801 (anti-CD47/anti-CD19 bispecific monoclonal antibody) Overview

TG-1801 is a first-in-class, bispecific CD47 and CD19 antibody. It is the first therapy to target both CD19, a B-cell specific market
widely expressed across B-cell malignancies, and CD47, the "don’t eat me" signal used by both healthy and tumor cells to evade macrophage
mediated phagocytosis. CD47 is expressed ubiquitously on normal cells, including red blood cells and platelets. CD19  is  a  specific  B-cell
marker, expressed early during pre-B cell ontogeny and until terminal differentiation into early plasma cells. The majority of B-cell lineage
malignancies (more than 90%) express CD19, including NHL, CLL and acute lymphoblastic leukemia (ALL). Tumor B-cells that have lost
the  expression  of  CD20  after  anti-CD20  mAb  therapy,  have  been  found  to  maintain  the  expression  of  CD19,  making  CD19  an  attractive
target in the treatment of B cell malignancies. By co-targeting both CD47 and CD19, TG-1801 has the potential to overcome the limitations
of existing CD47 targeted therapies by avoiding the side effects caused by indiscriminate blockade of CD47 on healthy cells. In addition to
potentially enhancing tolerability, the co-targeting of CD19 by TG-1801 may provide a secondary mechanism of direct anti-tumor activity
through the engagement of effector cells and induction of ADCC.

TG-1801 binds to human CD19 with significantly higher affinity than towards CD47. This difference between its affinity to CD19
and CD47 allows TG-1801 to bind and selectively block CD47 on CD19+ B-cells but not on CD19-  red  blood  cells  or  platelets  in  human
peripheral blood.

In in vitro assays, TG-1801 induces antibody-dependent cellular phagocytosis (ADCP) and ADCC of malignant tumor B-cell lines
and primary tumor B-cells from patients with B-cell acute lymphoblastic leukemia (B-ALL), B-cell chronic lymphocytic leukemia (B-CLL)
and numerous subtypes of NHL.

In in vivo mouse tumor models, treatment with TG-1801 inhibited tumor growth in Raji cell subcutaneous xenograft model, NALM-
6 cell disseminated tumor model, and patient-derived xenograft models, including primary tumor cells from patients with diffuse large B-cell
lymphoma  (DLBCL)  and  B-ALL.  In  addition,  the  combination  of  rituximab  and  TG-1801  demonstrated  enhanced  activity  over  TG-1801
monotherapy.

In summary, TG-1801 demonstrates anti-tumor activity in both in vitro assays (ADCP and ADCC) and in vivo animal tumor models.

In the first quarter of 2019, we commenced a Phase 1 first-in-human, dose-escalation study of TG-1801. This study is evaluating
escalating doses of TG-1801 in patients with B-Cell lymphoma. The primary objective of the study is to determine the recommended Phase 2
dose and to characterize the safety profile of TG-1801. Key secondary objectives are to evaluate the pharmacokinetics of TG-1801 and its
preliminary anticancer activity.  Enrollment is ongoing in this Phase 1 study.

Preclinical Programs

In addition to our clinical programs, we currently have licensed preclinical programs for BET (TG-1601), IRAK4, and GITR.

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
United States and in other countries. Our policy is to actively seek to obtain, where appropriate, the broadest intellectual property protection
possible 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. This knowledge, trade secrets, proprietary information and experience we call “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

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secret  protection  and  confidentiality  agreements  to  protect  our  interests.  To  this  end,  we  seek  to  protect  our  proprietary  technology  and
processes,  in  part,  by  entering  into  confidentiality  agreements  with  our  collaborators,  scientific  advisors,  employees  and  consultants,  and
invention assignment agreements with our employees and consultants. There can be no assurance, however, that we can prevent unauthorized
disclosure or use of our trade secrets, know-how and proprietary information despite the existence of confidentiality agreements.

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 number of 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.  Since  publication  of
discoveries  in  the  scientific  or  patent  literature  often  lags  behind  actual  discoveries,  we  are  not  certain  that  we  were  the  first  to  make  the
inventions covered by each of our pending patent applications or that we were the first to file those patent applications. 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 proceedings declared by the U.S. Patent and Trademark Office 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. 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 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 involve substantial costs.

We, or those companies from which we have licensed our drug candidates, file patent applications directed to our drug candidates in
an effort to establish intellectual property positions regarding these new chemical entities as well as uses of these new chemical entities in the
treatment  of  diseases.  We  also  file  patent  applications  directed  to  novel  combinations  of  our  drugs  together  and  with  drugs  developed  by
others. The intellectual property portfolios for our most advanced drug candidates as of February 2021 are summarized below. Each of these
portfolios contains one or more pending patent applications covering our products and product candidates and uses and combinations thereof.
 For those patents, prosecution is in progress. Prosecution is a lengthy process, during which the scope of the claims initially submitted for
examination by the USPTO is often significantly narrowed by the time they issue, if they issue at all. This may be the case with respect to our
pending patent applications referred to below.

UKONIQ (umbralisib)

Pursuant  to  our  license  for  UKONIQ  with  Rhizen,  we  have  the  exclusive  commercial  rights  to  a  series  of  patents  and  patent
applications in the U.S. and multiple countries around the world. The patent applications include composition of matter patents relating to the
structure, mechanism of action, and formulation for UKONIQ as well as method of use patents which cover use of UKONIQ in combination
with various agents and for various therapeutic indications.

The  composition  of  matter  patent  for  UKONIQ  has  been  issued  in  the  U.S.,  Europe,  and  other  jurisdictions,  including  Canada,
China, Korea, Japan, and Australia.  The expected expiration of the composition of matter patent is 2033, exclusive of patent term extensions,
which  could  result  in  later  expiration  dates.  Applications  are  pending  in  other  jurisdictions.  We  also  have  a  method  of  use  patent  on  the
combination of UKONIQ and ublituximab, which has been issued in the U.S., Europe, and other jurisdictions, including Australia, China,
Korea, and Japan, and is pending in other territories.  The expected expiration of the method of use patent for the combination of UKONIQ
and ublituximab is 2033.

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Ublituximab

Pursuant  to  our  license  for  ublituximab  with  LFB  Biotechnologies,  GTC  Biotherapeutics,  and  LFB/GTC  LLC,  we  have  the
exclusive commercial rights to a series of patents and patent applications in the U.S. and in multiple countries around the world, as well as a
non-exclusive  license  to  additional  background  patent  rights.  These  patents  and  patent  applications  include  composition  of  matter  patents
relating  to  the  structure  and  mechanism  of  action  for  ublituximab,  as  well  as  method  of  use  patents  which  cover  use  of  ublituximab  in
combination with various agents and for various therapeutic indications.  

The composition of matter patent for ublituximab has been issued in the U.S., Europe and other jurisdictions, including Australia,
Canada, China, Japan, Korea, and India.  The expected expiration for the composition of matter patent is 2029 in the U.S. and 2025 in Europe
and other non-US jurisdictions, exclusive of patent term extensions, which could result in later expiration dates. We also have a method of
use patent on the combination of UKONIQ and ublituximab, which has been issued in the U.S., Europe, and other jurisdictions, including
Australia,  China,  Korea,  and  Japan,  and  is  pending  in  other  territories.    The  expected  expiration  of  the  method  of  use  patent  for  the
combination of UKONIQ and ublituximab is 2033.

Cosibelimab (anti-PD-L1 monoclonal antibody)

Pursuant to our Global Collaboration with Checkpoint Therapeutics, we have the exclusive commercial rights in the treatment of
hematological  cancers  and  autoimmune  diseases  to  a  series  of  patents  and  patent  applications.  Patents  to  the  anti-PD-L1  antibody  and
methods  of  use  have  issued  in  the  U.S.,  Australia,  Japan,  Israel,  Korea,  and  Mexico,  and  are  pending  in  other  jurisdictions.  Any  patents
maturing from these pending applications are expected to expire no sooner than October 2033. A patent directed to the composition of matter
of cosibelimab has issued in the United States and is expected to expire in 2037, exclusive of patent term extensions, which could result in
later expiration dates.  Applications are pending in many other jurisdictions.          

TG-1701 (BTK inhibitor)

Pursuant to our license agreement with Jiangsu Hengrui, we have the exclusive commercial rights in the treatment of hematologic
cancers to a patent family which covers the composition of matter and proposed methods of use for various therapeutic indications in the U.S.
and certain other countries. Patents directed to the compound have granted in the U.S., Europe, and other jurisdictions, including Australia,
Canada, Japan, China, and Korea and are expected to expire no sooner than October 2034.  Applications are pending in other jurisdictions.

TG-1801 (anti-CD47/anti-CD19 bispecific antibody) 

Pursuant  to  our  joint  venture  and  license  option  agreement  with  NovImmune,  we  maintain  an  exclusive  option,  exercisable  at
specific  times  during  development,  to  license  the  commercial  rights  to  a  series  of  global  patent  applications  and  patents,  and  the  non-
exclusive right to certain technology patent applications. Patents directed to a bispecific antibody have issued in Australia, China, Europe,
Japan,  and  Russia  and  are  pending  in  other  jurisdictions  including  the  U.S.  Any  patents  maturing  from  these  pending  applications  are
expected to expire no sooner than December 2033. 

Limitations on Patent Rights and Trade Secrets

The patent rights that we own or have licensed relating to our product candidates are limited in ways that may affect our ability to
exclude third parties from competing against us if we obtain regulatory approval to market these product candidates. See “Item 1A – Risk
Factors -- Risks Related to the Company’s Intellectual Property.” In addition, the limited patent protection may adversely affect the value of
our products or product candidates and may inhibit our ability to obtain a corporate partner at terms acceptable to us, if at all.

Proof  of  direct  infringement  by  a  competitor  for  method  of  use  patents  can  prove  difficult  because  the  competitors  making  and
marketing a product typically do not engage in the patented use. Additionally, proof that a competitor contributes to or induces infringement
of a patented method of use by another can also prove difficult because an off-label use of a product could prohibit a finding of contributory
infringement, and inducement of infringement requires proof of intent by the competitor.

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Moreover, physicians may prescribe such a competitive identical product for indications other than the one for which the product has
been approved, or off-label indications, that are covered by the applicable patents. Although such off-label prescriptions may directly infringe
or contribute to or induce infringement of method of use patents, such infringement is difficult to prevent or prosecute.

Orphan Drug Designation 

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, or FDCA, to provide market exclusivity for certain of our drug 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 that 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 FDA approval of a designated orphan product will be granted a seven-year period of marketing
exclusivity for such FDA-approved orphan product.

Pursuant to these regulations, ublituximab received Orphan Drug Designation from the FDA for the treatment of MZL (Nodal and
Extranodal)  in  September  2013,  for  the  treatment  of  CLL  in  August  of  2010,  and  Orphan  Drug  Designation  by  the  European  Medicines
Agency (“EMA”) for the treatment of CLL in November of 2009.

We  also  obtained  Orphan  Drug  Designation  for  umbralisib  as  monotherapy  for  the  treatment  of  CLL  in  August  2016,  for  the
treatment of nodal, extranodal, and splenic MZL in April 2019, and for the treatment of FL in March 2020.  In addition, in January 2017, we
announced  that  the  FDA  granted  Orphan  Drug  Designation  covering  the  combination  of  ublituximab  and  umbralisib  for  the  treatment  of
patients with CLL and DLBCL.

U.S. Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration and specifics of the FDA approval of our drug candidates, some of our U.S. patents may be
eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, commonly referred to
as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent restoration term of up to five years as compensation
for patent term lost during product development and the FDA regulatory review process. However, patent term restoration cannot extend the
remaining term of a patent beyond a total of 14 years from the product’s approval date. The patent term restoration period is generally one-
half the time between the effective date of an IND and the submission date of an NDA or BLA plus the time between the submission date of
an NDA or BLA and the approval of that application. Only one patent applicable to an approved drug is eligible for the extension and the
application for the extension must be submitted prior to the expiration of the patent. The USPTO, in consultation with the FDA, reviews and
approves the application for any patent term extension or restoration. In the future, we intend to apply for restoration of patent term for one of
our currently owned or licensed patents to add patent life beyond its current expiration date, depending on the expected length of the clinical
trials and other factors involved in the filing of the relevant NDA or the BLA.

Also under the Hatch-Waxman Amendments, drugs that are new chemical entities (NCEs) are eligible for a five-year period of non-
patent marketing exclusivity in the United States. During the exclusivity period, the FDA may not accept for review an abbreviated new drug
application, or ANDA, or a 505(b)(2) NDA submitted by another company for another drug based on the same active moiety, regardless of
whether the drug is intended for the same indication as the original innovator drug or for another indication, where the applicant does not own
or have a legal right of reference to all the data required for approval. However, an application may be submitted after four years if it contains
a certification of patent invalidity or non-infringement to one of the patents listed with the FDA by the innovator NDA holder. The Hatch-
Waxman  Amendments  also  provide  three  years  of  marketing  exclusivity  for  an  NDA,  or  supplement  to  an  existing  NDA  if  new  clinical
investigations, other than bioavailability studies, that were conducted or sponsored by the applicant are deemed by the FDA to be essential to
the approval of the application, for example new indications, dosages or strengths of an existing drug. This three-year exclusivity covers only
the  modification  for  which  the  drug  received  approval  on  the  basis  of  the  new  clinical  investigations.    During  this  period,  FDA  will  not
approve  an  application  filed  by  a  third  party  for  the  protected  conditions  of  use  that  relies  on  any  of  the  data  from  the  new  clinical
investigations that was submitted by the innovator company. Five-year and three-year exclusivity will not delay the submission or approval of
a full NDA that does not rely on the innovator company’s data.

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The Biologics Price Competition and Innovation Act of 2009 (BPCIA) created a 12-year period of data exclusivity for innovator
biologics.  FDA  therefore  cannot  approve  a  biosimilar  application  relying  on  data  for  a  specific  reference  product  until  12  years  after  the
reference  product  is  first  licensed.  BLA  supplements  are  not  eligible  for  any  additional  exclusivity.  The  objectives  of  the  BPCIA  are
conceptually  similar  to  those  of  the  Hatch-Waxman  Act  described  above.  The  implementation  of  an  abbreviated  approval  pathway  for
biological products is under the direction of the FDA. Since the enactment of the BPCIA, the FDA has issued several draft guidance’s for
industry  related  to  the  BPCIA,  addressing  scientific,  quality  and  procedural  issues  relevant  to  an  abbreviated  application  for  a  biosimilar
product.  As of December 2020, FDA had approved 29 biosimilar applications.

Orphan  drug  exclusivity,  as  described  below,  may  offer  a  seven-year  period  of  marketing  exclusivity,  except  in  certain
circumstances.  Pediatric  exclusivity  is  another  type  of  regulatory  market  exclusivity  in  the  United  States.  Pediatric  exclusivity,  if  granted,
adds six months to existing exclusivity periods and patent terms. This six-month exclusivity, which runs from the end of other exclusivity
protection or patent term, may be granted based on the voluntary completion of a pediatric trial in accordance with an FDA-issued “Written
Request” for such a trial. 

 LICENSING AGREEMENTS AND COLLABORATIONS

We  have  formed  strategic  alliances  with  a  number  of  companies  for  the  manufacture  and  commercialization  of  our  products.  Our

current key strategic alliances are discussed below.

Ublituximab

LFB Biotechnologies S.A.S, GTC Biotherapeutics, LFB/GTC LLC.

In  January  2012,  we  entered  into  an  exclusive  license  agreement  with  LFB  Biotechnologies,  GTC  Biotherapeutics,  and  LFB/GTC
LLC,  all  wholly-owned  subsidiaries  of  LFB  Group,  relating  to  the  development  and  commercialization  of  ublituximab.  Under  the  license
agreement, we have acquired the exclusive worldwide rights (exclusive of France/Belgium) for the development and commercialization of
ublituximab.  To  date,  we  have  made  no  payments  to  LFB  Group  under  the  license  agreement,  excluding  an  upfront  equity  payment.  LFB
Group  is  eligible  to  receive  payments  of  up  to  an  aggregate  of  approximately  $31.0  million  upon  our  successful  achievement  of  certain
clinical  development,  regulatory  and  sales  milestones,  in  addition  to  royalty  payments  on  net  sales  of  ublituximab  at  a  royalty  rate  that
escalates from mid-single digits to high-single digits. The license will terminate on a country by country basis upon the expiration of the last
licensed patent right or 15 years after the first commercial sale of a product in such country, unless the agreement is earlier terminated (i) by
LFB if the Company challenges any of the licensed patent rights, (ii) by either party due to a breach of the agreement, or (iii) by either party
in the event of the insolvency of the other party.

Ildong Pharmaceutical Co. Ltd.

In November 2012, we entered into an exclusive (within the territory) sublicense agreement with Ildong relating to the development
and  commercialization  of  ublituximab  in  South  Korea  and  Southeast  Asia.  Under  the  terms  of  the  sublicense  agreement,  Ildong  has  been
granted a royalty bearing, exclusive right, including the right to grant sublicenses, to develop and commercialize ublituximab in South Korea,
Taiwan, Singapore, Indonesia, Malaysia, Thailand, Philippines, Vietnam, and Myanmar. To date, we have received $2 million in the form of
an  upfront  payment  from  Ildong  and  are  eligible  to  receive  sales-based  milestone  payments  up  to  an  aggregate  of  $5  million  and  royalty
payments  on  net  sales  of  ublituximab  at  a  royalty  rate  that  escalates  from  mid-teens  to  high-teens  upon  approval  in  South  Korea  and/or
Southeast Asia. The license will terminate on a country by country basis upon the expiration of the last licensed patent right or 15 years after
the first commercial sale of a product in such country, unless the agreement is earlier terminated (i) by Ildong if the Company challenges any
of the licensed patent rights, (ii) by either party due to a breach of the agreement, or (iii) by either party in the event of the insolvency of the
other party.

UKONIQ (umbralisib)

In  September  2014,  we  exercised  our  option  to  license  the  global  rights  to  umbralisib,  thereby  entering  into  an  exclusive  licensing
agreement  (the  “Umbralisib  License”)  with  Rhizen  Pharmaceuticals,  S  A  (“Rhizen”)  for  the  development  and  commercialization  of
umbralisib. Prior to this, we had been jointly developing umbralisib in a 50:50 joint venture with Rhizen.

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Under the terms of the Umbralisib License, Rhizen received a $4.0 million cash payment and 371,530 shares of our common stock as
an  upfront  license  fee.  With  respect  to  umbralisib,  Rhizen  will  be  eligible  to  receive  regulatory  filing,  approval  and  sales-based  milestone
payments in the aggregate of approximately $175 million, a small portion of which will be payable on the first NDA filing and the remainder
on  approval  in  multiple  jurisdictions  for  up  to  two  oncology  indications  and  one  non-oncology  indication  and  attaining  certain  sales
milestones. In addition, if umbralisib is co-formulated with another drug to create a new product (a "New Product"), Rhizen will be eligible to
receive similar regulatory approval and sales-based milestone payments for such New Product. Additionally, Rhizen will be entitled to tiered
royalties that escalate from high single digits to low double digits on our future net sales of umbralisib and any New Product. Rhizen will also
be eligible to participate in sublicensing revenue, if any, based on a percentage that decreases as a function of the number of patients treated
in clinical trials following the exercise of the license option. Rhizen will retain global manufacturing rights to umbralisib, provided that they
are price competitive with alternative manufacturers. The license will terminate on a country by country basis upon the expiration of the last
licensed patent right or any other exclusivity right in such country, unless the agreement is earlier terminated (i) by us for any reason, (ii) by
either party due to a breach of the agreement.

Cosibelimab

In March 2015, we entered into a Global Collaboration (the “Collaboration”) with Checkpoint Therapeutics, Inc. (“Checkpoint”) for
the development and commercialization of Checkpoint’s anti-PD-L1 and anti-GITR antibody research programs in the field of hematological
malignancies  with  an  option  to  acquire  rights  in  autoimmune  diseases.  These  antibodies  were  generated  at  Dana-Farber  Cancer  Institute
(Dana-Farber). In June 2019, we amended our Collaboration Agreement with Checkpoint to cover additional licenses necessary to continue
the  development  of  the  anti-PD-L1  and  anti-GITR  research  programs.    Under  the  terms  of  the  initial  Collaboration,  we  made  an  up-front
payment of $500,000, and upon entering into the amended agreement, made an additional payment of $1,000,000.  Under the terms of the
amended agreement, we will make development and sales-based milestone payments up to an aggregate of approximately $110 million, and
will pay a tiered low double-digit royalty on net sales. The royalty term will terminate on a country by country basis upon the later of (i) ten
years after the first commercial sale of any applicable licensed product in such country, or (ii) the expiration of the last-to-expire patent held
by Dana Farber containing a valid claim to any licensed product in such country.

TG-1701 (BTK inhibitor)

In January 2018, we entered into a global exclusive license agreement with Jiangsu Hengrui Medicine Co., (“Hengrui”), to acquire
worldwide  intellectual  property  rights,  excluding  Asia  but  including  Japan,  and  for  the  research,  development,  manufacturing,  and
commercialization of products containing or comprising of any of Hengrui’s Bruton’s Tyrosine Kinase inhibitors containing the compounds
of either TG-1701 (SHR-1459 or EBI-1459) or TG-1702 (SHR-1266 or EBI-1266) for hematologic malignancies. Pursuant to the agreement,
we  paid  Hengrui  an  upfront  fee  of  $1.0  million  in  our  common  stock  in  April  2018.  In  addition,  in  July  2019,  we  paid  Jiangsu  the  first
milestone  under  the  agreement  of  $0.1  million  in  our  common  stock.  Hengrui  is  eligible  to  receive  milestone  payments  totaling
approximately $350 million upon and subject to the achievement of certain milestones. Various provisions allow for payments in conjunction
with the agreement to be made in cash or our common stock, while others limit the form of payment. Royalty payments in the low double
digits  are  due  on  net  sales  of  licensed  products  and  revenue  from  sublicenses.  Additionally,  before  we  can  license,  sell,  develop,  or
commercialize ublituximab within China, we must notify Hengrui, giving Hengrui the right of first offer. The agreement allows combinations
of TG-1701 or TG-1702 with umbralisib, ublituximab, or U2. Additional combinations may be undertaken under the agreement subject to
additional pre-specified payments to Hengrui.

The term of the agreement expires after the expiration of the last royalty term to expire with respect to any of the patent rights under
the  agreement.  We  or  Hengrui  may  terminate  the  agreement  upon  notice  to  the  other  upon  breach  without  remedy  or  upon  insolvency.  In
addition, either party may terminate the agreement upon a material breach, after providing the other party with adequate notice and allowing
45 days to cure.

TG-1801 (anti-CD47/anti-CD19 bispecific antibody)

In June 2018, we entered into a Joint Venture and License Option Agreement with Novimmune SA (“Novimmune”) to collaborate
on the development and commercialization of Novimmune’s novel first-in-class anti-CD47/anti-CD19 bispecific antibody known as TG-1801
(previously  NI-1701).  The  companies  will  jointly  develop  the  product  on  a  worldwide  basis,  focusing  on  indications  in  the  area  of
hematologic B-cell malignancies. We serve as the primary responsible party for the development, manufacturing and commercialization of
the product. Pursuant to the agreement, in June 2018 we paid Novimmune an upfront payment of $3.0 million in our common stock. Further
milestone payments will be paid based on early clinical development, and the Company will be responsible for the costs of clinical

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development  of  the  product  through  the  end  of  the  Phase  2  clinical  trials,  after  which  the  Company  and  Novimmune  will  be  jointly
responsible  for  all  development  and  commercialization  costs.  The  Company  and  Novimmune  will  each  maintain  an  exclusive  option,
exercisable at specific times during development, for the Company to license the rights to TG-1801, in which case Novimmune is eligible to
receive additional milestone payments totaling approximately $185 million as well as tiered royalties on net sales in the high single to low
double digits upon and subject to the achievement of certain milestones.

IRAK4

In  June  2014,  we  entered  into  an  exclusive  licensing  agreement  with  Ligand  Pharmaceuticals  Incorporated  (“Ligand”)  for  the
development and commercialization of Ligand's interleukin-1 receptor associated kinase-4 (“IRAK4”) inhibitor technology, which currently
is in preclinical development for potential use against certain cancers and autoimmune diseases. IRAK4 is a serine/threonine protein kinase
that is a key downstream signaling component of the interleukin-1 receptor and multiple toll-like receptors.

Under the terms of the license agreement, Ligand received 125,000 shares of our common stock as an upfront license fee. Ligand
will  also  be  eligible  to  receive  maximum  potential  milestone  payments  of  approximately  $207  million  upon  the  achievement  of  specific
clinical,  regulatory  and  commercial  milestone  events.  Additionally,  Ligand  will  be  entitled  to  royalties  on  our  future  net  sales  of  licensed
products containing IRAK4 inhibitors. The basic royalty rate for licensed products covered by Ligand's issued patents will be 6% for annual
sales of up to $1 billion and 9.5% for annual sales in excess of that threshold. The license will terminate on a country by country basis upon
the expiration of the last licensed patent right or 10 years after the first commercial sale of a product in such country, unless the agreement is
earlier terminated by either party due to a breach of the agreement in the event of the insolvency of the other party.

TG-1601 (BET inhibitor)

In  May  2016,  as  part  of  a  broader  agreement  with  Jubilant  Biosys  (“Jubilant”),  we  entered  into  a  sub-license  agreement  (JBET
Agreement)  with  Checkpoint  for  the  development  and  commercialization  of  Jubilant’s  novel  BET  inhibitor  program  in  the  field  of
hematological  malignancies.  The  BET  inhibitor  program  is  the  subject  of  a  family  of  patents  covering  compounds  that  inhibit  BRD4,  a
member of the BET (Bromodomain and Extra Terminal) domain for cancer treatment. Our BET inhibitor program is currently in pre-clinical
development.

Under the terms of the agreement, we paid Checkpoint an up-front licensing fee of $1.0 million and will make additional payments
contingent  on  certain  preclinical,  clinical,  and  regulatory  milestones,  including  commercial  milestones  totaling  up  to  approximately  $177
million and a single-digit royalty on net sales.  TG will also provide funding to support certain targeted research efforts at Jubilant.

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.

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 diseases and conditions that we are targeting. Some of these potential
competing drugs are further advanced in development than our drug candidates and may be commercialized earlier. The resulting changes in
standard of care can impact the likelihood of regulatory accelerated approval opportunities for our drug candidates.

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For the cancer indications for which we are developing our products there are a number of established therapies with which we will

compete:

● For the treatment of Chronic Lymphocytic Leukemia, if U2 is approved, we expect U2 to compete with approved drugs such as
ibrutinib  (AbbVie  and  Janssen),  acalabrutinib  (AstraZeneca),  venetoclax  (AbbVie  and  Roche),  obinutuzumab  (Roche),
idelalisib  (Gilead),  duvelisib  (Verastem),  and  established  treatments  such  as  rituximab  (Roche),  and  several  generically
available  chemotherapies.  Additionally,  there  are  second  generation  BTK  inhibitors  similar  to  ibrutinib  in  late-stage  clinical
testing for CLL that could enter the market in the next 12-36 months. Each of these agents can be used as monotherapy or in
combination with one or more of the other agents.

● For  the  treatment  of  Marginal  Zone  Lymphoma,  we  expect  UKONIQ  (umbralisib)  to  compete  with  ibrutinib  (AbbVie  and
Janssen),  lenalidomide  (Bristol-Myers),  and  established  treatments  such  as  rituximab,  and  several  generically  available
chemotherapies. There are several kinase inhibitors in earlier stages of development.

● For  the  treatment  of  Follicular  Lymphoma,  we  expect  umbralisib  to  compete  with  approved  drugs  such  as  obinutuzumab
(Roche),  idelalisib  (Gilead),  copanlisib  (Bayer),  duvelisib  (Verastem),  lenalidomide  (Bristol-Myers),  tazemetostat  (Epizyme),
and established treatments such as rituximab (Roche), and several generically available chemotherapies. Each of these agents
can  be  used  as  monotherapy  or  in  combination  with  one  or  more  of  the  other  agents.  There  are  several  kinase  inhibitors  in
earlier  stages  of  development.  In  addition,  a  number  of  pharmaceutical  companies  are  developing  antibodies  and  bispecific
antibodies  targeting  CD20,  CD19,  CD47  and  other  B-cell  associated  targets,  chimeric  antigen  receptor  T-cell  (“CAR-T”)
immunotherapy, and other B-cell ablative therapy which, if approved, would potentially compete with U2 and UKONIQ.

For  Multiple  Sclerosis  for  which  we  are  developing  ublituximab  there  are  a  number  of  established  therapies  with  which  we  will

compete:

● If ublituximab is approved, we expect ublituximab will primarily compete against other CD20 targeted agents, while the group
of CD20 targeted agents will also compete broadly against a number of already approved MS therapies. Currently, there are two
anti-CD20 monoclonal antibodies approved, ocrelizumab (Roche) and ofatumumab (Novartis).

Cosibelimab, TG-1701 and TG-1801 if approved will also face competition from drugs on the market and under development that

are in the same therapeutic class as each of those drugs.

Additional information can be found under Item “1A - Risk Factors – Other Risks Related to Our Business” within this report. 

SUPPLY AND MANUFACTURING

We  have  limited  experience  in  manufacturing  products  for  clinical  or  commercial  purposes.  We  currently  do  not  have  any
manufacturing  capabilities  of  our  own.  We  have  established  contract  manufacturing  relationships  for  the  supply  of  ublituximab.  For  the
supply  of  umbralisib,  Rhizen  has  established  contract  manufacturing  relationships  as  part  of  our  licensing  agreement.  As  with  any  supply
program,  obtaining  pre-clinical  and  clinical  materials  of  sufficient  quality  and  quantity  to  meet  the  requirements  of  our  development
programs  cannot  be  guaranteed  and  we  cannot  ensure  that  we  will  be  successful  in  this  endeavor.  In  addition,  as  we  move  closer  to
commercialization for ublituximab we will need to scale-up production to ensure adequate commercial supply, complete validation batches
and  complete  pre-approval  inspection  batches.  We  have  completed  validation  batches  and  are  currently  in  the  process  of  scaling  up
ublituximab  production,  including  completing  pre-approval  inspection  batches  for  ublituximab.  This  is  an  expensive  process  which  will
require  significant  investment  on  our  part  over  the  next  24  months  and  there  can  be  no  assurance  given  that  such  scale-up  and  process
validation  will  be  successful  in  providing  pharmaceutical  product  that  is  of  sufficient  quantity,  or  of  a  quality  that  is  consistent  with  our
previously established specifications, or that meets the requirements set by regulatory agencies under which we may seek approval of our
product candidates.

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Process improvements are common during clinical development to accommodate raw material and component variability, enhance
productivity  and/or  accommodate  different  or  larger  equipment  utilized  during  the  scale-up  process  required  for  commercial  manufacture.
These types of incremental process changes have been made during clinical development for both TG’s small and large molecule programs.
For  example,  our  UNITY-CLL  Phase  3  clinical  trial  contains  ublituximab  produced  from  both  a  pre-commercial  process  and  the  current
commercial process. While there are some analytical differences between the two materials, we do not expect those differences to have an
effect on the clinical performance of ublituximab. The primary difference is that the commercial process has resulted in further enhancement
to the ADCC effect, potentially enhancing potency. We will analyze the Phase 3 data to ensure that the materials are substantially similar in
performance. If there are material differences in safety or efficacy, we may need to adjust our statistical analysis of the Phase 3 study, which
could impact the approvability of the U2 combination in CLL.

At the time of commercial sale, to the extent possible and commercially practicable, we would seek to engage back-up suppliers for
raw materials, manufacturing and testing services for each of our product candidates. Until such time, we expect that we will rely on a single
contract  manufacturer  to  produce  each  of  our  product  candidates  under  current  Good  Manufacturing  Practice,  or  cGMP,  regulations.  Our
third-party  manufacturers  have  a  limited  number  of  facilities  in  which  our  product  candidates  can  be  produced  and  will  have  limited
experience in manufacturing our product candidates in quantities sufficient for commercialization. Our third-party manufacturers will have
other clients and may have other priorities that could affect their ability to perform the work satisfactorily and/or on a timely basis. Both of
these occurrences would be beyond our control. 

We expect to similarly rely on contract manufacturing relationships for any products that we may in-license or acquire in the future.

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 in the U.S. are subject to ongoing periodic and unannounced inspections by the FDA, the Drug Enforcement
Administration if applicable, and corresponding state agencies to ensure strict compliance with cGMP and other state and federal regulations.
Contract manufacturers outside of the United States face similar challenges from the numerous local and regional 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 after commercialization, the FDA and corresponding foreign regulatory agencies must approve
these  new  manufacturers  in  advance,  which  will  involve  testing,  regulatory  submissions,  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 REGULATION

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.    We,  along  with  our  third-party  contractors,  will  be  required  to  navigate  the  various  pre-  and  post-approval
requirements  of  the  governing  regulatory  agencies  of  the  jurisdictions  in  which  we  wish  to  conduct  clinical  studies  or  market  our  product
candidates.  None of our product candidates, except UKONIQ, have 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 review and approval process implemented by the FDA under the FDCA and, in the case of biologics, the Public Health Service
Act (PHS Act). The FDA regulates, among other things, the pre-clinical and clinical testing, safety, efficacy, approval, manufacturing, quality
control and assurance, record keeping, pharmacovigilance and adverse event reporting, packaging, labeling, storage, advertising, promotion,
import and export, sale and distribution of biopharmaceutical products.  The process of obtaining regulatory approvals and the subsequent
compliance with applicable federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial
resources.

Product Development and Applications for Marketing Authorization

The regulatory review and approval process is lengthy, expensive and uncertain. We are required to submit extensive pre-clinical and

clinical data and supporting information to the FDA for each indication or use to establish a drug candidate’s safety and efficacy before

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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,  pre-clinical  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.

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.  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  drug  candidate,  known  as
toxicological  studies,  or  clinical  trials  of  drug  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 drug candidates and could ultimately prevent approval
by the FDA or foreign regulatory authorities for any or all targeted indications.

For purposes of clinical development and to pursue 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.

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 drug candidates;
● adverse medical events or side effects in treated patients; and
● ineffectiveness of the drug candidates.

For clinical trials that are intended to form the basis of a new drug or biologics license application for approval, sponsors of drugs
may apply for an SPA from the FDA, by which the FDA provides official evaluation and written guidance on the design and size of proposed
protocols.  While  obtaining  an  SPA  provides  some  assurance  the  design  of  a  trial  should  be  sufficient  for  approval,  the  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  agreement  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.

In  September  2015,  we  reached  an  agreement  with  the  FDA  regarding  an  SPA  on  the  design,  endpoints  and  statistical  analysis
approach of a Phase 3 clinical trial, referred to as the UNITY-CLL trial, for the proprietary combination of ublituximab and umbralisib, for
the treatment of CLL. The SPA provides agreement that the Phase 3 trial design adequately addresses objectives that, if met, would support
the regulatory submission for drug approval of both ublituximab and umbralisib in combination. Additionally, in August 2017, we reached

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an agreement with the FDA regarding an SPA on the design of two Phase 3 clinical trials for ublituximab, referred to as the ULTIMATE I and
ULTIMATE II Phase 3 clinical trials, for the treatment of relapsing forms of Multiple Sclerosis (RMS). The SPA provides agreement that the
two Phase 3 trial designs adequately address objectives that, if met, would support the regulatory submission for approval of ublituximab.
Despite obtaining an SPA the trials may not be positive and even if positive may not support FDA approval.

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 expedited 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,
or NDA. To receive Fast Track designation, an applicant must demonstrate:

● that the drug is intended to treat a serious or life-threatening condition; and
● that nonclinical or clinical data demonstrate the potential to address an unmet medical need.

The FDA must respond to a request for Fast Track designation within 60 calendar days of receipt of the request. Over the course of
drug 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 are also permitted to submit portions of an NDA or BLA to the FDA on a rolling basis
where the FDA may consider reviewing portions of a marketing application before the sponsor submits the complete application.

In addition, sponsors may also apply to the FDA for Breakthrough Therapy Designation (“BTD”). The procedures and requirements
for BTD are similar to those required for Fast Track such that the Breakthrough Therapy Designation is intended to expedite the development
and review of a potential new drug for serious or life-threatening diseases, however, with BTD, there is a further requirement that the sponsor
present “preliminary clinical evidence” which “indicates that the drug may demonstrate substantial improvement over existing therapies on
one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development.” The designation of
a drug as a Breakthrough Therapy was enacted as part of the 2012 Food and Drug Administration Safety and Innovation Act.

In  January  2019,  we  announced  that  the  FDA  granted  Breakthrough  Therapy  Designation  for  umbralisib  for  the  treatment  of
adult patients with marginal zone lymphoma (MZL) who have received at least one prior anti-CD20 regimen based on interim results from a
subset of patients from the MZL cohort of the UNITY-NHL clinical trial.

Sponsors  of  drugs  granted  Fast  Track  or  breakthrough  therapy  designation  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. To obtain accelerated approval a sponsor must be able to demonstrate the drug candidate treats a
serious condition, provides a meaningful advantage over other available therapies, and demonstrates an effect on a surrogate endpoint that is
reasonably likely to predict clinical benefit.  Many companies have filed for accelerated approval and have subsequently failed to obtain such
approval  for  a  variety  of  reasons.  To  the  extent  a  product  does  obtain  an  accelerated  approval,  such  approval  will  be  subject  to  the
requirement that the applicant study the drug further in a post-marketing confirmatory clinical trial 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.  Accelerated  approval  is  sometimes  referred  to  as  conditional  approval  because  if  the  results  of  these
confirmatory clinical trials fail to verify clinical benefit, the FDA has the right to remove the drug from the market and has done so in the
recent  past.    Post-marketing  confirmation  studies  are  usually  underway  at  the  time  an  applicant  files  the  NDA.    When  required  to  be
conducted, such post-marketing confirmation studies must also be adequate and well-controlled.  The applicant must carry out any such post-
marketing confirmation studies with due diligence.

In  February  2021,  we  obtained  accelerated  approval  of  UKONIQ  for  relapsed  or  refractory  MZL  who  have  received  at  least  one
prior anti-CD20-based regimen and for relapsed or refractory FL who have received at least three prior lines of systemic therapy.  The FDA
approved these indications based on overall response rate. Continued approval for these indications may be contingent upon verification and
description of clinical benefit in a confirmatory trial.

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

The NDA and BLA review process also generally includes a pre-approval inspection, or PAI, to assess the manufacturing facilities
and  relevant  processes  and  data  for  compliance,  and  readiness  for  commercial  manufacture  in  accordance  with  cGMPs.  Among  the
conditions of approval is the requirement that a manufacturer’s quality systems and manufacturing procedures conform to cGMP.  Even when
product approval is received, manufacturers must expend significant time, money and effort to ensure continued compliance, and the FDA
conducts periodic surveillance inspections to monitor the manufacturing process and drug quality and evaluate whether the manufacturers are
in compliance. It may be difficult for our manufacturers or 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.  Many  drug  approvals  have  been  delayed  due  to  issues  at  contract  manufacturing  facilities.  If  we  were  to
experience  any  such  delay  that  would  negatively  impact  our  business  and  timeline  to  commercialization  of  any  of  our  drug  candidates
affected by such manufacturing issue.

Post-Approval Requirements

Any  products  for  which  we  receive  FDA  approval  are  subject  to  continuing  regulation  by  the  FDA  and  other  federal  and  state
regulators on a wide range of matters, including, among other things cGMPs and product quality, pharmacovigilance and reporting of adverse
events, product distribution requirements, fulfilling post-marketing or confirmatory study or REMS commitments, and complying with FDA
promotion  and  advertising  requirements.    Violations  of  the  FDCA  or  other  post-approval  regulatory  requirements  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.

The FDA promotion and advertising requirements applicable to marketed products include, among other things, standards for direct-
to-consumer  advertising,  restrictions  against  promoting  products  for  uses  or  in  patient  populations  that  are  not  either  described  in  the
product’s approved indications and uses or otherwise consistent with the FDA-approved product labeling, limitations on industry-sponsored
scientific  and  educational  activities,  rules  regarding  communication  of  health  care  economic  information  regarding  biopharmaceutical
products to payors and formularies, and requirements for promotional activities involving the internet. Drugs whose review was accelerated
may carry additional requirements on marketing activities, including the requirement that all promotional materials are pre-submitted to the
FDA. Although a healthcare provider may prescribe a product for a use that has not been approved by the FDA when the healthcare provider
deems such use to be appropriate in his or her professional medical judgment, manufacturers may not market or promote unapproved uses.
Although court decisions have to some degree impacted FDA’s enforcement activity regarding alleged off-label promotion in light of First
Amendment considerations, there are still significant risks in this area, in part because there is the potential for False Claims Act exposure in
addition to the potential for enforcement under the FDCA.

After  product  approval,  quality  control  and  manufacturing  procedures  must  continue  to  conform  to  applicable  manufacturing
requirements. FDA regulations require among other things, quality control and quality assurance as well as the corresponding maintenance of
records  and  documentation  and  the  obligation  to  investigate  and  correct  any  deviations  from  cGMPs.  Manufacturers  and  other  entities
involved in the manufacture and distribution of approved products are required to register their establishments and list their products with the
FDA and certain state agencies.  Manufacturers and their third-party contractors may be subject to periodic unannounced inspections by the
FDA  and  certain  state  agencies  for  assessment  of  compliance  with  cGMPs  and  other  applicable  laws.  Accordingly,  manufacturers  must
continue  to  expend  time,  money,  and  effort  in  the  areas  of  production  and  quality  control  to  maintain  quality  control  and  manufacturing
compliance.  Discovery  of  problems  with  a  product  after  approval  may  result  in  restrictions  on  a  product,  including,  among  other  things,
withdrawal of approval, recall or withdrawal of the product from the market.  In addition, changes to the manufacturing process are strictly
regulated, and depending on the significance of the change, may require prior FDA approval or notification before being implemented. Other
types of changes to the approved product, such as adding new indications and claims to the product labeling, are also subject to further FDA
review and approval.

Marketed products must meet the requirements of the Drug Supply Chain Security Act, or DSCSA, which regulates the commercial
distribution  of  prescription  drug  products  at  the  federal  level.   The  DSCSA  sets  certain  standards  for  federal  or  state  registration,  requires
tracing  of  products  through  the  pharmaceutical  distribution  supply  chain,  and  imposes  other  requirements  on  entities  in  the  supply  chain,
including manufacturers and repackagers, wholesale distributors, third-party logistics providers, and dispensers. The DSCSA requirements,
development of standards, and the system for product tracing have been and will continue to be phased in over a period of years, with FDA
indicating enforcement discretion on certain aspects due to the COVID-19 pandemic.

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In addition, the postmarketing discovery of previously unknown problems with a product or the failure to comply with applicable FDA
requirements can have negative consequences, including adverse publicity, judicial or administrative enforcement, warning letters from the
FDA, mandated corrective advertising or communications with doctors, and civil or criminal penalties, among others. Newly discovered or
developed  safety  or  effectiveness  data  may  require  changes  to  a  product’s  approved  labeling,  including  the  addition  of  new  warnings  and
contraindications, and may require the implementation of other risk management measures.

From time to time, legislation is drafted, introduced and passed in Congress that could significantly change the statutory provisions
governing the approval, manufacturing and marketing of products regulated by the FDA.  In addition to new legislation, FDA regulations,
guidance documents, and policies are often revised or reinterpreted by the agency in ways that may significantly affect our business.  It is
impossible to predict whether further legislative or FDA regulation or policy changes will be enacted or implemented and what the impact of
such changes, if any, may be.

Should  we  wish  to  market  our  products  outside  the  U.S.,  we  must  receive  marketing  authorization  from  the  appropriate  foreign
regulatory  authorities.  The  requirements  governing  the  conduct  of  clinical  trials,  marketing  authorization,  pricing  and  reimbursement  vary
widely from country to country. Importantly, the level of evidence of efficacy and safety necessary to apply for marketing authorization for a
drug candidate differs from country to country. In particular, clinical trial endpoints, and the level of clinical evidence that may support an
accelerated approval filing with the FDA, such as the ORR data from the single-arm cohorts of the UNITY-NHL study that we used as the
basis for a filing and approval for UKONIQ in MZL and FL, may be insufficient to file for marketing applications outside of the U.S. At
present,  companies  are  typically  required  to  apply  for  foreign  marketing  authorizations  at  a  national  level.  However,  within  the  European
Union, centralized registration procedures are available to companies wishing to market a product across the European Union member states.
Typically,  if  the  regulatory  authority  is  satisfied  that  a  company  has  presented  adequate  evidence  of  safety,  quality  and  efficacy,  then  the
regulatory  authority  will  grant  a  marketing  authorization.  This  foreign  regulatory  approval  process,  however,  involves  risks  similar  or
identical to the risks associated with FDA approval discussed above, and therefore we cannot guarantee that we will be able to obtain the
appropriate marketing authorization for any product in any particular country.

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. We cannot predict the likelihood, nature, effect or extent of adverse governmental regulation that might arise from future legislative
or administrative action, either in the U.S. or abroad.

Coverage and Reimbursement

Sales of our drugs will depend, in part, on the extent to which our drugs will be covered by third-party payors, such as government
health  programs,  commercial  insurance  and  managed  healthcare  organizations.  These  third-party  payors  are  increasingly  reducing
reimbursements for medical drugs and services. In addition, the containment of healthcare costs has become a priority of foreign and U.S.
federal and state governments, and the prices of drugs have been a focus in this effort. The U.S. government, state legislatures and foreign
governments  have  shown  significant  interest  in  implementing  cost-containment  programs,  including  price  controls,  restrictions  on
reimbursement, importation, and requirements for substitution of generic drugs. Adoption of price controls and cost-containment measures,
and adoption of more restrictive policies in jurisdictions with existing controls and measures, could further limit our net revenue and results.
Decreases  in  third-party  reimbursement  for  our  drug  candidates,  if  approved,  or  a  decision  by  a  third-party  payor  to  not  cover  our  drug
candidates could reduce physician usage of such drugs and have a material adverse effect on our sales, results of operations and financial
condition.

In the U.S., the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of
2010,  or  collectively  the  Affordable  Care  Act,  enacted  in  March  2010,  has  had  a  significant  impact  on  the  health  care  industry.  The
Affordable  Care  Act  expanded  coverage  for  the  uninsured  while  at  the  same  time  containing  overall  healthcare  costs.  With  regard  to
pharmaceutical  products,  the  Affordable  Care  Act,  among  other  things,  created  a  new  average  manufacturer  price  definition  under  the
Medicaid Drug Rebate Program for drugs that are inhaled, infused, instilled, implanted or injected and not generally dispensed through the
retail channel, increased the minimum Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program and extended the
rebate program to individuals enrolled in Medicaid managed care organizations, established annual fees and taxes on manufacturers of certain
branded  prescription  drugs,  and  a  new  Medicare  Part  D  coverage  gap  discount  program,  in  which  manufacturers  must  agree  to  offer  50%
point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period (subsequent
legislation increased this to 70% effective as of January 1, 2019), as a condition for the manufacturer’s outpatient drugs to be covered under
Medicare Part D.

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Since  the  enactment  of  the  Affordable  Care  Act,  certain  provisions  of  the  Affordable  Care  Act  have  been  subject  to  judicial
challenges as well as efforts to repeal or replace them or to alter their interpretation or implementation.  For example, the Tax Cuts and Jobs
Act enacted on December 22, 2017 (the Tax Act), eliminated the shared responsibility payment for individuals who fail to maintain minimum
essential coverage under section 5000A of the Internal Revenue Code of 1986, commonly referred to as the individual mandate, effective
January 1, 2019.  In December 2018, a United States District Court Judge for the Northern District of Texas ruled (i) that the “individual
mandate”  was  unconstitutional  as  a  result  of  the  associated  tax  penalty  being  repealed  by  Congress  as  part  of  the  Tax  Act;  and  (ii)  the
individual mandate is not severable from the rest of the Affordable Care Act, and as a result the entire Affordable Care Act is invalid.  On
December  18,  2019,  the  U.S.  Court  of  Appeals  for  the  Fifth  Circuit  affirmed  the  district  court’s  decision  that  the  individual  mandate  is
unconstitutional,  but  remanded  the  case  to  the  district  court  to  reconsider  the  severability  question.    Thereafter,  the  U.S.  Supreme  Court
agreed to hear this case. Oral argument in the case took place on November 10, 2020, and a ruling by the Court is expected sometime this
year.  Although  litigation  and  legislation  over  the  Affordable  Care  Act  are  likely  to  continue,  with  unpredictable  and  uncertain  results,  we
expect that the Biden administration may seek to expand and strengthen the Affordable Care Act.

There  has  been  increasing  legislative  and  enforcement  interest  in  the  United  States  with  respect  to  drug  pricing  practices.
 Specifically, there have been several recent U.S. Congressional inquiries and proposed federal and state legislation designed to, among other
things,  bring  more  transparency  to  drug  pricing,  reduce  the  cost  of  prescription  drugs  under  Medicare,  review  the  relationship  between
pricing  and  manufacturer  patient  programs,  and  reform  government  program  reimbursement  methodologies  for  drugs.  The  Trump
administration issued five executive orders intended to lower the costs of prescription drug products but it is unclear whether, and to what
extent,  these  orders  will  remain  in  force  under  the  Biden  administration,  which,  like  the  Trump  administration,  has  indicated  lowering
prescription drug prices is a priority.  Although we do not know what steps the Biden administration will take with respect to drug pricing, we
expect that additional U.S. federal healthcare reform measures could be adopted in the future, any of which could limit the amounts that the
U.S. federal government will pay for healthcare products and services, which could result in additional pricing pressures and reduced demand
for any of our products that receive marketing approval.

At  the  state  level,  individual  states  are  increasingly  aggressive  in  passing  legislation  and  implementing  regulations  designed  to
control prescription drug pricing, including price and marketing cost disclosure and transparency measures, and, in some cases, authorizing
importation of prescription drugs from other countries. In addition, regional health care authorities and individual hospitals are increasingly
using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other
health care programs. These measures could reduce the ultimate demand for our products or put pressure on our product pricing. We expect
that additional state healthcare reform measures will be adopted in the future, which could limit the amounts that state governments will pay
for healthcare products and services and result in additional pricing pressures.

  In  addition,  in  some  foreign  countries,  the  proposed  pricing  for  a  prescription  drug  must  be  approved  before  the  drug  may  be
lawfully marketed. The requirements governing drug pricing vary widely from country to country. For example, the United Kingdom and
many  European  Union  member  states  have  robust  health  technology  assessment  processes  to  determine  pricing  and  reimbursement  for
pharmaceuticals through their national health insurance system.   Many European Union members states also include either direct or indirect
price referencing, or other price control mechanisms, in determining the price of a pharmaceutical in their market. There can be no assurance
that  any  country  that  has  price  controls  or  reimbursement  limitations  for  pharmaceutical  drugs  will  allow  favorable  reimbursement  and
pricing arrangements for any of our products. Historically, drugs launched in the European Union do not follow price structures of the U.S.
and generally tend to be significantly lower.

Other U.S. Healthcare Laws

We may also be subject to healthcare regulation and enforcement by the federal government and the states and foreign governments
where we may market our product candidates, if approved. These laws include, without limitation: state and federal anti-kickback, fraud and
abuse,  false  claims,  privacy  and  security  laws;  laws  governing  interactions  with  healthcare  professionals  and  related  transparency
requirements (such as the federal Sunshine Act and a range of state biopharmaceutical marketing and transparency laws); and requirements
for  manufacturers  to  report  certain  calculated  product  prices  to  the  government  or  provide  certain  discounts  or  rebates  to  government
authorities  or  private  entities,  often  as  a  condition  of  reimbursement  under  government  healthcare  programs.  The  compliance  and
enforcement  landscape  is  informed  by  government  enforcement  precedent  and  settlement  history,  Advisory  Opinions,  and  Special  Fraud
Alerts. The risks we face and our approach to compliance may evolve over time in light of these types of developments. The potential safe
harbors available for, example, relative to the Anti-Kickback Statute, are subject to change through legislative and regulatory action, and we
may decide to adjust our business practices or be subject to heightened scrutiny as a result.  

The  federal  Anti-Kickback  Statute  prohibits,  among  other  things,  any  person  from  knowingly  and  willfully  offering,  soliciting,
receiving or paying remuneration, directly or indirectly, to induce either the referral of an individual, for an item or service or the purchasing
or ordering of a good or service, for which payment may be made under federal healthcare programs such as the Medicare and Medicaid

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programs. The government has enforced the Anti-Kickback Statute to reach large settlements with healthcare companies based on research,
consulting  and  other  financial  arrangements  with  physicians  that  the  government  alleged  were  not  based  on  the  provision  of  bona  fide
services and were intended as an inducement or reward. A person or entity does not need to have actual knowledge of the statute or specific
intent to violate it in order to have committed a violation. In addition, the government may assert that a claim including items or services
resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the federal False Claims
Act.  The  majority  of  states  also  have  anti-kickback  laws,  which  establish  similar  prohibitions  and  in  some  cases  may  apply  to  items  or
services reimbursed by any third-party payor, including commercial insurers.

In addition, the civil False Claims Act prohibits, among other things, knowingly presenting or causing the presentation of a false,
fictitious  or  fraudulent  claim  for  payment  to  the  U.S.  government.  Actions  under  the  False  Claims  Act  may  be  brought  by  the  Attorney
General or as a qui tam action by a private individual in the name of the government. Violations of the False Claims Act can result in very
significant monetary penalties and treble damages. The federal government is using the False Claims Act, and the accompanying threat of
significant liability, in its investigation and prosecution of pharmaceutical and biotechnology companies throughout the U.S., for example, in
connection with the promotion of products for unapproved uses and other sales and marketing practices. The government has obtained multi-
million  and  multi-billion  dollar  settlements  under  the  False  Claims  Act  in  addition  to  individual  criminal  convictions  under  applicable
criminal  statutes.  Given  the  significant  size  of  actual  and  potential  settlements,  it  is  expected  that  the  government  will  continue  to  devote
substantial resources to investigating healthcare providers’ and manufacturers’ compliance with applicable fraud and abuse laws.

The federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, also created new federal criminal statutes that
prohibit  among  other  actions,  knowingly  and  willfully  executing,  or  attempting  to  execute,  a  scheme  to  defraud  any  healthcare  benefit
program, including private third-party payors, knowingly and willfully embezzling or stealing from a healthcare benefit program, willfully
obstructing a criminal investigation of a healthcare offense, and knowingly and willfully falsifying, concealing or covering up a material fact
or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items
or services. Similar to the federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific
intent to violate it in order to have committed a violation.

There has also been a recent trend of increased federal and state regulation of payments made to physicians and other healthcare
providers. The Affordable Care Act, among other things, imposes new reporting requirements on drug manufacturers for payments made by
them  to  physicians  and  teaching  hospitals,  as  well  as  ownership  and  investment  interests  held  by  physicians  and  their  immediate  family
members. Failure to submit required information may result in civil monetary penalties of up to an aggregate of $150,000 per year (or up to
an aggregate of $1 million per year for “knowing failures”), for all payments, transfers of value or ownership or investment interests that are
not  timely,  accurately  and  completely  reported  in  an  annual  submission.  Drug  manufacturers  are  required  to  submit  annual  reports  to  the
Centers  for  Medicare  &  Medicaid  Services,  which  publicly  posts  the  data  on  its  website.  Effective  January  1,  2022,  these  reporting
obligations  will  extend  to  include  transfers  of  value  made  to  certain  non-physician  providers  such  as  physician  assistants  and  nurse
practitioners.  Certain  states  also  mandate  implementation  of  compliance  programs,  impose  restrictions  on  drug  manufacturer  marketing
practices and/or require the tracking and reporting of gifts, compensation and other remuneration to physicians.

We may also be subject to data privacy and security regulation by both the federal government and the states in which we conduct
our  business.  HIPAA,  as  amended  by  the  Health  Information  Technology  and  Clinical  Health  Act,  or  HITECH,  and  their  respective
implementing  regulations,  including  the  final  omnibus  rule  published  on  January  25,  2013,  imposes  specified  requirements  relating  to  the
privacy, security and transmission of individually identifiable health information. Among other things, HITECH makes HIPAA’s privacy and
security standards directly applicable to “business associates,” defined as independent contractors or agents of covered entities that create,
receive,  maintain  or  transmit  protected  health  information  in  connection  with  providing  a  service  for  or  on  behalf  of  a  covered  entity.
HITECH also increased the civil and criminal penalties that may be imposed against covered entities, business associates and possibly other
persons, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal
HIPAA laws and seek attorney’s fees and costs associated with pursuing federal civil actions. In addition, according to the U.S. Federal Trade
Commission, or the FTC, failing to take appropriate steps to keep consumers' personal information secure constitutes unfair acts or practices
in  or  affecting  commerce  in  violation  of  Section  5(a)  of  the  Federal  Trade  Commission  Act.  The  FTC  expects  a  company's  data  security
measures to be reasonable and appropriate in light of the sensitivity and volume of consumer information it holds, the size and complexity of
its  business,  and  the  cost  of  available  tools  to  improve  security  and  reduce  vulnerabilities.  Medical  data  is  considered  sensitive  data  that
merits  stronger  safeguards.  The  FTC's  guidance  for  appropriately  securing  consumers'  personal  information  is  similar  to  what  is  required
under HIPAA.

In addition, we may be subject to state law equivalents of each of the above federal laws, such as anti-kickback and false claims laws

which may apply to items or services reimbursed by any third-party payor, including commercial insurers, and state laws governing

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the  privacy  and  security  of  health  information  in  certain  circumstances,  many  of  which  differ  from  each  other  in  significant  ways,  thus
complicating compliance efforts.  For example, the California Consumer Protection Act, or CCPA, which went into effect on January 1, 2020,
establishes a new privacy framework for covered businesses by creating an expanded definition of personal information, establishing new
data privacy rights for consumers in California, and creating a new and potentially severe statutory damages framework for violations of the
CCPA  and  for  businesses  that  fail  to  implement  reasonable  security  procedures  and  practices  to  prevent  data  breaches.    The  CCPA  was
recently  amended  by  the  California  Privacy  Rights  Act  (CPRA),  expanding  certain  consumer  rights  such  as  the  right  to  know.  It  remains
unclear what, if any, additional modifications will be made to these laws by the California legislature or how these laws will be interpreted
and  enforced.  The  potential  effects  of  the  CCPA  and  CPRA  are  significant  and  may  cause  us  to  incur  substantial  costs  and  expenses  to
comply.

Rest of the World Healthcare Regulation

For  other  countries  outside  of  the  U.S.  and  the  European  Union,  the  requirements  governing  the  conduct  of  clinical  trials,  drug
licensing,  sales  and  marketing,  pricing  and  reimbursement  vary  from  country  to  country.  If  we  fail  to  comply  with  applicable  foreign
regulatory requirements, we may be subject to, among other things, fines, suspension or withdrawal of regulatory approvals, product recalls,
seizure of products, operating restrictions and criminal prosecution.

European Union member states, the United Kingdom, Switzerland and other foreign jurisdictions have adopted data protection laws
and regulations, which impose significant compliance obligations. In the European Union and the United Kingdom, the collection and use of
personal data, including clinical trial data, is governed by the provisions of the General Data Protection Regulation, or GDPR. The GDPR,
together with national legislation, regulations and guidelines of the European Union member states and the United Kingdom governing the
processing of personal data, impose strict obligations and restrictions on the ability to collect, analyze and transfer personal data, including
health  data  from  clinical  trials  and  adverse  event  reporting.  In  particular,  these  obligations  and  restrictions  concern  the  consent  of  the
individuals to whom the personal data relates, the information provided to the individuals, the transfer of personal data out of the European
Union or the United Kingdom, security breach notifications, security and confidentiality of the personal data and imposition of substantial
potential fines for breaches of the data protection obligations. Compliance with the GDPR is a rigorous and time-intensive process that may
increase the cost of doing business to ensure full compliance.  Furthermore, European data protection authorities may interpret the GDPR and
national  laws  differently  and  impose  additional  requirements,  which  add  to  the  complexity  of  processing  personal  data  in  or  from  the
European Union or United Kingdom.

Human Capital

As  of  February  18,  2021,  we  had  272  full-time  employees.  None  of  our  employees  are  represented  by  a  collective  bargaining

agreement, and we have never experienced a work stoppage.

We  believe  that  our  future  success  largely  depends  upon  our  continued  ability  to  attract  and  retain  a  diverse  workforce  of  highly
skilled and dedicated employees. We provide our employees with competitive salaries and bonuses and opportunities for equity ownership.
 In addition, we provide an inclusive and collaborative work environment with learning and development opportunities. We strive to foster a
culture of diversity in backgrounds and ideas as we believe that diversity, equity, and inclusion are paramount to our success. We understand
that in order to perform at maximum capacity, our workforce needs to cultivate a welcoming and inclusive environment wherein employees
feel  they  can  represent  themselves  fully.  We  pride  ourselves  on  being  an  equal  opportunity  employer  and  strictly  prohibit  unlawful
discrimination based on color, religion, gender, sexual orientation, gender identity/expression, national origin/ancestry, age, disability, marital
and veteran status.

We  expect  to  continue  to  grow  our  organizational  footprint  in  2021  with  a  focus  on  expanding  our  commercialization  team  in
preparation for the potential U.S. launches of U2 in CLL and ublituximab in MS. We will continue to evaluate the business needs and market
opportunities, balancing in-house expertise and core competencies with outsourced capacity.  

Drug development and commercialization requires deep expertise across a broad array of disciplines. Pharmaceutical companies of
all sizes compete for a limited number of qualified applicants to fill specialized positions. To attract qualified candidates, the Company offers
an attractive total rewards package, consisting of base salary, cash bonus, a comprehensive benefit package, equity compensation, and 401(k)
plan. Bonus opportunities and equity compensation increase as a percentage of total compensation based on level of responsibility, and actual
bonus awards are based on performance.

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ITEM 1A. RISK FACTORS.

You should carefully consider the following risk factors and the other information contained elsewhere in this Annual Report before
making an investment in our securities. If any of the following risks occur, our business, financial condition or operating results could be
materially harmed. An investment in our securities is speculative in nature, involves a high degree of risk, and should not be made by an
investor  who  cannot  bear  the  economic  risk  of  its  investment  for  an  indefinite  period  of  time  and  who  cannot  afford  the  loss  of  its  entire
investment. The risks described below are not the only ones that our business faces. Additional risks not currently known to us or that we
currently  deem  to  be  immaterial  may  adversely  impact  our  business  in  the  future.  Additionally,  many  of  these  risks  and  uncertainties  are
currently elevated by and may or will continue to be elevated by the COVID-19 pandemic.

Risks Related to Commercialization

If UKONIQ, or any product candidate for which we in the future obtain regulatory approval, does not achieve broad market acceptance
among  physicians,  patients,  healthcare  payors,  and  the  medical  community,  the  revenues  that  we  generate  from  product  sales  will  be
limited.

We have one marketed product, UKONIQ (umbralisib), which received accelerated approval from the FDA on February 5, 2021 for
the  treatment  of  relapsed  or  refractory  MZL  in  patients  who  have  received  at  least  one  prior  anti-CD20-based  regimen  and  relapsed  or
refractory FL in patients who have received at least three prior lines of systemic therapy.  While we have initiated the commercial launch of
UKONIQ in the U.S., we have limited experience as a commercial company and our ability to successfully overcome the risks associated
with  commercializing  drugs  in  the  biopharmaceutical  industry,  including  the  risk  that  our  products  do  not  achieve  an  adequate  level  of
acceptance,  remains  uncertain.    UKONIQ  as  well  as  other  drugs  that  we  may  bring  to  the  market  in  the  future  may  not  gain  market
acceptance by physicians, patients, third-party payors and others in the healthcare community.  If our products do not achieve an adequate
level  of  acceptance,  we  may  not  generate  significant  revenues,  and  we  may  not  become  profitable.  The  degree  of  market  acceptance  of
UKONIQ, as well as any future product candidates for which we obtain approval, will depend on a number of factors, including:

● the timing of our receipt of marketing approvals, the terms of such approvals, and the countries in which such approvals are

obtained;

● the efficacy, safety and tolerability as demonstrated in clinical trials and as compared to alternative treatments;
● the timing of market introduction of any of our product candidates as well as competitive products;
● the indications for which our products are approved, and other aspects of the approved labeling for such products;
● acceptance by physicians, major operators of cancer or neurology clinics, and patients of our products as safe, tolerable and

effective treatments;

● the potential and perceived advantages or disadvantages of our products compared to alternative treatments;
● our ability to offer our products for sale at competitive prices;
● the availability of adequate reimbursement by third party payors and government authorities;
● the extent of patient cost-sharing obligations, including copays and deductibles;
● changes in regulatory requirements by government authorities for our products;
● relative convenience and ease of administration;
● the prevalence and severity of side effects and adverse events;
● the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;
● the effectiveness of our sales and marketing efforts;
● protecting our rights in our intellectual property portfolio;
● our ability to maintain a reliable supply of our products that meets market demand; and
● favorable or unfavorable publicity relating to our products or relating to the Company.

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Our ability to successfully launch and secure market acceptance of UKONIQ and our late-stage product candidate ublituximab, if
approved, may be impacted by the evolving COVID-19 pandemic, although we are currently unable to predict or quantify any such potential
impact  with  any  degree  of  certainty.   As  a  result  of  the  measures  state  and  local  governments  have  taken  to  date  to  control  the  spread  of
COVID-19,  our  office-based  employees  are  working  remotely  and  many  of  our  commercialization  efforts  are  happening  virtually.    The
success  of  our  commercialization  may  be  impacted  by  the  increased  reliance  on  work-from-home  arrangements  for  our  employees,
consultants, vendors, and potential customers. If the spread of COVID-19 and the social distancing measures taken by various governments
continue, any commercial launch we undertake, including the ongoing launch of UKONIQ, may be hindered by various factors, including
challenges in hiring employees necessary to support expansion of our commercialization footprint; delays in demand due to impacts on the
healthcare  system  and  overall  economy;  delays  in  coverage  decisions  from  Medicare  and  third-party  payors;  restrictions  on  our  personal
interactions with physicians, hospitals, payors, and other customers; interruptions or delays in our commercial supply chain; and increases in
the number of uninsured or underinsured patients.  

If  UKONIQ  or  any  future  products  for  which  we  receive  regulatory  approval  do  not  achieve  an  adequate  level  of  acceptance  by
physicians, hospitals, healthcare payors and patients, we may not generate sufficient revenue from these products and we may not become or
remain profitable, which would have a material adverse effect on our business.

We may be subject to limitations on the indicated uses or requirements to fulfill certain post-marketing requirements to the satisfaction of
regulatory authorities, or may be unable to maintain marketing approval for UKONIQ or future products that we may bring to market.

Regulatory approvals for any of our product candidates may be subject to limitations on the approved indicated uses for which the
product  may  be  marketed  or  contain  requirements  for  potentially  costly  post-marketing  testing,  including  Phase  IV  clinical  trials,  and
surveillance  to  monitor  the  safety  and  efficacy  of  the  approved  product  candidate.  With  respect  to  the  FDA’s  approval  of  UKONIQ  for
relapsed or refractory MZL and FL, we received accelerated approval and are subject to certain post-approval requirements.  For example, we
will need to conduct a confirmatory clinical trial, which will involve a Phase 3 trial that may be expensive and time-consuming and may not
confirm the benefit making the MZL and FL indications for UKONIQ subject to withdrawal of continued approval by the FDA, which could
significantly harm our business. In addition, we will need to conduct additional clinical studies to address post-marketing commitments and
post-marketing  requirements  related  to  further  assessing  the  drug-drug  interaction  profile  of  UKONIQ  and  its  safety,  efficacy,  and
pharmacokinetic properties in certain at-risk populations.  These studies are highly specialized in their design and conduct and are associated
with considerable expenses, and based on the outcome, could result in further labeling restrictions that could impair or restrict the way in
which we are able to market UKONIQ, or negatively impact its overall clinical profile.  

In  addition,  with  respect  to  UKONIQ,  and  any  product  candidate  that  the  FDA  or  a  comparable  foreign  regulatory  authority
approves,  the  manufacturing  processes,  labeling,  packaging,  distribution,  import,  export,  adverse  event  reporting,  storage,  advertising,
promotion and recordkeeping for the product will be subject to extensive and ongoing regulatory requirements. These requirements include
submissions  of  safety  and  other  post-marketing  information  and  reports,  registration,  as  well  as  continued  compliance  with  current  Good
Manufacturing Practices, or GMPs, with Good Clinical Practices, or GCPs, for any clinical trials that we conduct post-approval, and with
Good Laboratory Practices, or GLPs, for any nonclinical studies. Later discovery of previously unknown problems with a product or with our
third-party manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may result in, among other things,
restrictions on the marketing or manufacturing of the product, withdrawal of the product from the market, mandatory safety labeling changes
or  product  recalls,  suspension  or  revocation  of  product  approvals,  product  seizure  or  detention,  refusal  to  permit  the  import  or  export  of
products,  and  injunctions  or  the  imposition  of  civil  or  criminal  penalties,  all  of  which  would  adversely  affect  our  business,  prospects  and
ability to achieve or sustain profitability.

UKONIQ, and any of product candidates for which we in the future obtain approval, may after approval be found to cause undesirable
side effects that could result in significant negative consequences following commercialization.

As UKONIQ or any future approved products are used more widely or for a longer duration after being brought to market, data may
emerge  from  clinical  studies,  including  confirmatory  or  other  post-marketing  studies,  or  from  adverse  event  reporting  that  may  affect  the
commercial potential of our products.  For example, as additional patients are exposed for longer durations to UKONIQ in the commercial
and clinical settings, it is unknown whether greater frequency and/or severity of adverse events are likely to occur or whether an acceptable
safety and tolerability profile will continue to be demonstrated. If we or others identify unexpected side effects, caused by UKONIQ or our
product candidates following introduction into the market, a number of potentially significant negative consequences could result, including:

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● regulatory authorities may withdraw or limit the use (indication) of such products;
● regulatory authorities may require the addition of labeling statements, including warnings or boxed warnings, precautions, or
contraindications  that  could  diminish  the  usage  of  the  product  or  otherwise  limit  the  commercial  success  of  the  affected
product;

● we may be required to change the way such drug candidates are distributed or administered, or to conduct additional clinical

trials;

● regulatory  authorities  may  require  a  Risk  Evaluation  and  Mitigation  Strategy  (REMS),  a  plan  to  mitigate  risks,  which  could
include  a  Medication  Guide,  physician  communication  plans,  or  elements  to  assure  safe  use,  such  as  restricted  distribution
methods, patient registries and other risk minimization tools;

● we may be subject to regulatory investigations and government enforcement actions;
● we may decide to remove such drug candidates from the marketplace;
● we may not be able to enter into collaboration agreements on acceptable terms and execute on our business model;
● we could be sued and held liable for injury caused to individuals exposed to or taking our products; and
● our reputation may suffer.

Any  one  or  a  combination  of  these  events  could  prevent  us  from  maintaining  regulatory  approval  and  achieving  or  maintaining
market  acceptance  of  the  affected  product  or  could  substantially  increase  the  costs  and  expenses  of  commercializing  the  affected  product,
which in turn could significantly impact our ability to successfully commercialize our drug candidates and generate revenues.

The  incidence  and  prevalence  for  target  patient  populations  of  UKONIQ  and  our  product  candidates  have  not  been  established  with
precision. If the market opportunities for UKONIQ and our product candidates are smaller than we estimate or if any approval that we
obtain  is  based  on  a  narrower  definition  of  the  patient  population,  our  revenue  and  ability  to  achieve  profitability  will  be  adversely
affected, possibly materially.

The  precise  incidence  and/or  prevalence  of  relapsed  or  refractory  MZL  after  one  prior  anti-CD20-based  regimen,  relapsed  or
refractory FL after three prior lines of systemic therapy, CLL, and relapsing forms of MS are unknown. Our projections of both the number of
patients  within  our  FDA-approved  indications  for  UKONIQ  and  target  indications  for  ublituximab  and  UKONIQ  (U2)  in  CLL  and
ublituximab in MS, as well as the subset of these patients who have the potential to benefit from treatment with our products, are based on
estimates. These estimates are typically based on one on one and group interactions with target physicians and other sources available at the
time we make the estimates, including the scientific literature, healthcare utilization databases and market research. Although we believe our
estimates are reasonable, many factors may limit their accuracy.  For example, the sources we use to make the estimates may prove to be
incorrect. Further, new studies may change the estimated incidence or prevalence of these diseases and the number of patients may turn out to
be lower than expected.

The total addressable market opportunity for UKONIQ in MZL and FL, U2 in CLL, and ublituximab in MS will ultimately depend
upon, among other things, the scope of the final approved indication and other elements of the approved prescribing information, acceptance
by  the  medical  community,  patient  access,  and  drug  pricing  and  reimbursement.  The  number  of  patients  in  major  markets,  including  the
number  of  addressable  patients  in  those  markets,  may  turn  out  to  be  lower  than  expected,  patients  may  not  be  otherwise  amenable  to
treatment with our drugs, new patients may become increasingly difficult to identify or gain access to, or patients and physicians may choose
to utilize competitive products, all of which would adversely affect our results of operations and our business.

We face substantial competition, which may result in others commercializing drugs before or more successfully than we do resulting in
the reduction or elimination of our commercial opportunity.

We  operate  in  a  highly  competitive  segment  of  the  biotechnology  and  biopharmaceutical  market.  We  face  competition  from
numerous  sources,  including  commercial  pharmaceutical  and  biotechnology  enterprises,  academic  institutions,  government  agencies,  and
private and public research institutions. Many of our competitors have significantly greater financial, product development, manufacturing
and  commercialization  resources.  Large  pharmaceutical  companies  have  extensive  experience  in  clinical  testing  and  obtaining  regulatory
approval  for  drugs.  Additionally,  many  universities  and  private  and  public  research  institutes  are  active  in  cancer  research,  some  in  direct
competition with us. We may also compete with these organizations to recruit scientists and clinical development personnel. Smaller or early-
stage  companies  may  also  prove  to  be  significant  competitors,  particularly  through  collaborative  arrangements  with  large  and  established
companies.

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Our  commercial  opportunity  could  be  reduced  or  eliminated  if  our  competitors  develop  and  commercialize  drugs  that  are  more
effective, have fewer or less severe side effects, are more convenient or are priced or contracted differently than any drugs that we or our
collaborators  may  develop.  Our  competitors  also  may  obtain  FDA  or  other  regulatory  approval  for  their  drugs  more  rapidly  than  we  may
obtain approval for ours, which could result in our competitors establishing a strong market position before we or our collaborators are able to
enter the market. In a competitive environment, a company’s communications may also be subject to heightened scrutiny from regulators and
competitors,  under  laws,  regulations,  and  guidance  about  promotional  communications  (advertising  and  promotional  labeling)  and  non-
promotional communications (e.g., certain educational and scientific exchange); and with regard to potential competitor actions under federal
law (the Lanham Act) and congruous state law, which protect businesses against the unfair competition of misleading advertising or labeling.

The key competitive factors affecting the success of all of our drug candidates, if approved, are likely to be their efficacy, safety,

convenience, price, the level of generic competition and the availability of reimbursement from government and other third-party payors.

For the cancer indications for which we received FDA approval of UKONIQ or for which we are developing our product candidates

there are a number of established therapies with which we will compete:

● For  the  treatment  of  MZL,  we  expect  UKONIQ  to  compete  with  ibrutinib  (AbbVie  and  Janssen),  and  the  combination  of
rituximab and lenalidomide (Bristol-Myers Squibb), as well as established treatments such as rituximab (Roche) and several
generically available chemotherapies.   In addition, there are investigational PI3K inhibitors being developed in MZL.  

● For  the  treatment  of  FL,  we  expect  UKONIQ  to  compete  with  recently  approved  drugs  such  as  obinutuzumab  (Roche),
idelalisib  (Gilead),  copanlisib  (Bayer),  duvelisib  (Verastem),  tazemetostat  (Epizyme),  and  the  combination  of  rituximab  and
lenalidomide (Bristol-Myers Squibb), and established treatments such as rituximab (Roche), and several generically available
chemotherapies,  many  of  which  have  FDA-approved  indications  for  earlier  lines  of  therapy  (e.g.,  after  two  prior  lines  of
systemic therapy) than UKONIQ. There are also several PI3K delta inhibitors in earlier stages of development for FL.

● For the treatment of CLL, if U2 is approved, we expect the regimen to compete with recently approved drugs such as ibrutinib
(AbbVie  and  Janssen),  acalabrutinib  (AstraZeneca),  venetoclax  (AbbVie  and  Roche),  obinutuzumab  (Roche),  idelalisib
(Gilead)  and  duvelisib  (Verastem),  and  established  treatments  such  as  rituximab  (Roche),  and  several  generically  available
chemotherapies. Additionally, there are second generation BTK inhibitors similar to ibrutinib in late-stage clinical testing for
CLL that could enter the market in the next 12-36 months. These agents can be used as monotherapy or in combination with
one or more of the other agents.

● In addition, a number of pharmaceutical companies are developing antibodies and bispecific antibodies targeting CD20, CD19,
CD47 and other B-cell associated targets, chimeric antigen receptor T-cell (CAR-T) immunotherapy, and other B-cell ablative
therapy which, if approved, would potentially compete with U2 and UKONIQ.

For  Multiple  Sclerosis  for  which  we  are  developing  ublituximab  there  are  a  number  of  established  therapies  with  which  we  will

compete:

● If ublituximab is approved, we expect ublituximab will primarily compete against other CD20 targeted agents, while the group
of CD20 targeted agents will also compete broadly against a number of already approved MS therapies. Currently, there are two
anti-CD20 monoclonal antibodies approved, ocrelizumab (Roche) and ofatumumab (Novartis).

Cosibelimab, TG-1701 and TG-1801 if approved will also face competition from drugs on the market and under development in the

same therapeutic class as each of those drugs.

New developments, including the development of other pharmaceutical technologies and methods of treating disease, occur in the
pharmaceutical  and  life  sciences  industries  at  a  rapid  pace.  These  developments  may  render  our  product  candidates  obsolete  or
noncompetitive. Compared to us, many of our potential competitors have substantially greater:

● research and development resources, including personnel and technology;
● regulatory experience;
● pharmaceutical development, clinical trial and pharmaceutical commercialization experience;
● experience and expertise in exploitation of intellectual property rights; and
● capital resources.

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We will also face competition from these third parties in recruiting and retaining qualified personnel, establishing clinical trial sites,

patient registration for clinical trials, and in identifying and in-licensing new product candidates.

UKONIQ, as well as any products that we are able to commercialize in the future, may become subject to unfavorable pricing regulations
or third-party coverage and reimbursement policies, which would harm our business.

The regulations that govern regulatory approvals, pricing and reimbursement for new drugs vary widely from country to country.
Some countries require approval of the sale price of a drug before it can be marketed. In many countries, the pricing review period begins
after marketing approval is granted. In some foreign markets, prescription pharmaceutical pricing remains subject to continuing governmental
control even after initial approval is granted. As a result, we might obtain marketing approval for a product in a particular country, but then be
subject to price regulations that delay our commercial launch of the drug candidate, possibly for lengthy time periods, and negatively impact
the revenues we are able to generate from the sale of the drug candidate in that country. Adverse pricing limitations may hinder our ability to
recoup our investment in one or more products, even if our product candidates obtain marketing approval.  Eligibility for reimbursement does
not imply that any drug will be paid for in all cases or at a rate that covers our costs, including research, development, manufacture, sale and
distribution. Interim reimbursement levels for new drugs, if applicable, may also not be sufficient to cover our costs and may not be made
permanent. In addition, if we are successful in obtaining FDA approval for ublituximab for the treatment of CLL and MS, we will need to
identify  and  execute  a  pricing  strategy  that  takes  into  account  the  value  of  the  product  in  each  indication  independently  to  realize  the
product’s  full  potential  in  both  indications.    If  we  are  unable  to  identify  and  execute  such  a  strategy,  the  pricing  of  ublituximab  across
indications may not be optimal, which may have a material adverse impact on the sales in one or both of the indications and on our overall
business.

Our ability to commercialize any product successfully also will depend in part on the extent to which coverage and reimbursement
for  our  products  and  related  treatments  will  be  available  from  government  authorities,  private  health  insurers  and  other  organizations.
Government  authorities  and  third-party  payors,  such  as  private  health  insurers  and  health  maintenance  organizations,  decide  which
medications  they  will  pay  for  and  establish  reimbursement  and  co-payment  levels.  A  primary  trend  in  the  U.S.  healthcare  industry  and
elsewhere is cost containment. Government authorities and third-party payors have attempted to control costs by limiting coverage and the
amount  of  reimbursement  for  particular  drugs.  Increasingly,  third-party  payors  are  requiring  that  drug  companies  provide  them  with
predetermined  discounts  from  list  prices  and  are  challenging  the  prices  charged  for  drugs,  examining  the  cost  effectiveness  of  drugs  in
addition to their safety and efficacy.  Third-party commercial payors often rely upon Medicare coverage policy and payment limitations in
setting their own reimbursement policies.  Payors may restrict coverage of some products by using formularies under which only selected
drugs  are  covered,  variable  co-payments  that  make  drugs  that  are  not  preferred  by  the  payor  more  expensive  for  patients,  and  utilization
management controls, such as requirements for prior authorization or failure first on another type of treatment.  Payors may target higher-
priced  drugs  for  imposition  of  these  obstacles  to  coverage,  and  consequently  our  products  may  be  subject  to  payer-driven  restrictions.
Additionally, in countries where patients have access to insurance, as in the U.S., insurance co-payment amounts or other benefit limits may
represent  a  barrier  to  obtaining  or  continuing  use  of  our  products  that  receive  regulatory  approval.  If  we  are  unable  to  obtain  or  maintain
coverage, or coverage is reduced in one or more countries, our product sales may be lower than anticipated and our financial condition could
be harmed.

Net  prices  for  drugs  may  be  reduced  by  mandatory  discounts  or  rebates  required  by  government  healthcare  programs  or  private
payors and by any future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices.  In
the United States, for example, we must offer discounted pricing or rebates on purchases of pharmaceutical products under various federal
and state healthcare programs, such as the Medicaid Drug Rebate Program, the 340B drug pricing program and the Medicare Part D Program.
We  must  also  report  specific  prices  to  government  agencies  under  healthcare  programs,  such  as  the  Medicaid  Drug  Rebate  Program  and
Medicare  Part  B.  The  calculations  necessary  to  determine  the  prices  reported  are  complex  and  the  failure  to  report  prices  accurately  may
expose us to penalties. 

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If, in the future, we are unable to establish a commercial operation, including sales and marketing capabilities or enter into agreements
with  third  parties  to  sell  and  market  our  drug  candidates,  we  may  not  be  successful  in  commercializing  our  product  candidates  if  and
when they are approved, and we may not be able to generate any revenue.

In  preparation  for  the  FDA  approval  and  commercial  introduction  of  UKONIQ,  we  made  and  continue  to  make  significant
investments to build a commercial organization and infrastructure. We have hired and continue to hire marketing, sales, and medical support
personnel and have built processes and systems to support a commercial launch of UKONIQ in the U.S. We are expanding the build out of
our commercialization team and infrastructure in planning for the potential commercial launches of U2 in CLL and ublituximab in MS prior
to knowing whether we can complete the necessary regulatory submissions and, if so, whether FDA will approve such submissions.  It is
possible  that  the  FDA  approval  is  unexpectedly  delayed  or  is  not  received  at  all.  In  either  case  we  will  incur  delays  that  may  impede  or
significantly delay our ability to generate revenue and at the same time will incur significant expenses. If this were to occur, it would have a
material adverse effect on the Company.

There are risks involved with both establishing our own sales, marketing, and other commercialization capabilities. For example,
recruiting  and  training  a  sales  force  are  expensive  and  time-consuming  and  could  delay  any  drug  launch.  If  the  commercial  launch  of  a
product candidate (e.g., U2 in CLL or ublituximab in MS) 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  UKONIQ  and  our  product  candidates  on  our  own  and  generate  product

revenues include:

● our inability to recruit and retain adequate numbers of effective sales and marketing personnel;
● the  costs  and  time  associated  with  the  initial  and  ongoing  training  of  sales  and  marketing  personnel  on  legal  and  regulatory

compliance matters and with ongoing monitoring of their activities;

● the inability of sales personnel to obtain access to physicians or to effectively promote any future drugs;
● the lack of complementary drugs to be offered by sales personnel, which may put us at a competitive disadvantage relative to

companies with more extensive product lines;

● our ability to maintain a healthcare compliance program including effective mechanisms for compliance monitoring; and
● unforeseen costs and expenses associated with creating a sales and marketing organization.

In the future, we may choose to participate in sales activities with collaborators for some of our product candidates if and when they
are approved.  However, there are also risks with entering into these types of arrangements with third parties to perform sales, marketing and
distribution services.  For example, we may not be able to enter into such arrangements on terms that are favorable to us.  Our drug revenues
or  the  profitability  of  these  drug  revenues  to  us  are  likely  to  be  lower  than  if  we  were  to  market  and  sell  any  product  candidates  that  we
develop ourselves. In addition, we likely will have little control over such third parties, and any of them may fail to devote the necessary
resources  and  attention  to  sell  and  market  our  product  candidates  effectively.  If  we  do  not  establish  sales  and  marketing  capabilities
successfully,  either  on  our  own  or  in  collaboration  with  third  parties,  we  will  not  be  successful  in  commercializing  our  drug  candidates.
Further, our business, results of operations, financial condition and prospects will be materially adversely affected.

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Product  liability  lawsuits  against  us  could  cause  us  to  incur  substantial  liabilities  and  could  limit  commercialization  of  any  drug
candidates that we may develop.

We face an inherent risk of product liability exposure related to the testing of our product candidates in human clinical trials and use
of our product candidates through compassionate use programs in the event we establish such programs, and we will face an even greater risk
as we commercially sell UKONIQ and any other product candidates that we may develop. If we cannot successfully defend ourselves against
claims  that  UKONIQ  or  our  product  candidates  caused  injuries,  we  could  incur  substantial  liabilities.  Regardless  of  merit  or  eventual
outcome, liability claims may result in:

● decreased demand for any products that we may commercialize;
● injury to our reputation and significant negative media attention;
● withdrawal of clinical trial participants;
● significant costs to defend the related litigation;
● substantial monetary awards to trial participants or patients;
● loss of revenue; and
● the inability to commercialize any product candidates that we may develop.

Although  we  maintain  product  liability  insurance  coverage,  it  may  not  be  adequate  to  cover  all  liabilities  that  we  may  incur.  Insurance
coverage  is  increasingly  expensive.  We  may  not  be  able  to  maintain  insurance  coverage  at  a  reasonable  cost  or  in  an  amount  adequate  to
satisfy any liability that may arise.

Risks Related to Our Financial Position and Need for Additional Capital

We have incurred significant operating losses since our inception and anticipate that we will incur continued losses for the foreseeable
future.

Biopharmaceutical drug development is a highly speculative undertaking and involves a substantial degree of risk. We commenced
operations in January 2012. Our operations to date have been limited primarily to organizing and staffing our company, business planning,
raising  capital,  developing  our  technology,  identifying  potential  drug  candidates,  undertaking  pre-clinical  studies  and  clinical  trials,  and
preparing for commercialization of only marketed product UKONIQ, which received FDA approval in February 2021. We are transitioning
from a company with a research and development focus to a company capable of supporting commercial activities. We may not be successful
in such a transition.  

Since inception, we have focused our efforts and financial resources on clinical trials, manufacturing of our drug candidates, and
preparing to support a commercial product. To date, we have financed our operations primarily through public offerings of our common stock
and  a  debt  financing.  Through  February  18,  2021,  we  have  received  an  aggregate  of  approximately  $1.3  billion  from  such  transactions.
Approximately  $30  million  is  from  our  term  loan  facility  with  Hercules  (as  defined  below)  that  we  secured  in  February  of  2019.  The
remaining amount constitutes the aggregate gross proceeds from the sale of common stock in one or more offerings and through the use of
our at the market sales program, or ATM. 

Since inception, we have incurred significant operating losses. As of December 31, 2020, we had an accumulated deficit of $980.6
million. Substantially all of our operating losses have resulted from costs incurred in connection with our research and development programs
and from general and administrative costs associated with our operations. We expect to continue to incur significant expenses and operating
losses  for  the  foreseeable  future.    Our  prior  losses,  combined  with  expected  future  losses,  have  had  and  will  continue  to  have  an  adverse
effect on our stockholders’ deficit and working capital.  Other than the FDA approval of UKONIQ, we have not obtained marketing approval
for any of our product candidates, which are in preclinical or clinical development stages.  We expect to continue to incur significant research
and development expenses in connection with continuing our existing clinical trials and beginning additional clinical trials. In addition, we
expect to continue to incur significant sales, marketing and outsourced-manufacturing expenses as we commercialize UKONIQ and plan for
the  possible  commercialization  of  our  other  product  candidates,  if  approved.  As  a  result,  we  expect  to  continue  to  incur  significant  and
increasing  operating  losses  for  the  foreseeable  future.  Because  of  the  numerous  risks  and  uncertainties  associated  with  developing
pharmaceuticals, we are unable to predict the extent of any future losses or when we will become profitable, if at all. Even if we do become
profitable, we may not be able to sustain or increase our profitability on a quarterly or annual basis. Our ability to become profitable depends
upon our ability to generate revenue.

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To date, we have not generated any significant revenue from our product sales, and it is uncertain when and if we will generate any
significant  revenue  from  the  sale  of  our  products  in  the  future.  Our  ability  to  become  profitable  depends  upon  our  ability  to  generate
significant  and  sustained  revenues.  To  obtain  significant  and  sustained  revenues,  we  must  succeed,  either  alone  or  with  others,  in  (i)
developing and obtaining regulatory approval for our product candidates, including ublituximab, and for additional indications of UKONIQ;
and  (ii)  manufacturing  and  marketing  our  products  and  product  candidates.  Accordingly,  we  do  not  expect  to  generate  significant  and
sustained revenue unless and until we obtain marketing approval of ublituximab and additional indications of UKONIQ and/or one of our
other product candidates. Our ability to generate significant and sustained revenue depends on a number of factors, including, but not limited
to, our ability to:

● successfully complete clinical trials that meet their clinical endpoints;
● initiate and successfully complete all safety, pharmacokinetic, biodistribution, and non-clinical studies required to obtain U.S.

and foreign marketing approval for our product candidates;

● obtain approval from the FDA and foreign equivalents to market and sell our product candidates and maintain FDA approval of

UKONIQ for relapsed or refractory MZL and FL;

● establish  commercial  manufacturing  capabilities  with  third  parties  that  are  satisfactory  to  the  regulatory  authorities,  cost
effective, and that are capable of providing commercial supply of our product candidates, or, in the case of UKONIQ, maintain
these capabilities;

● expand  on  our  commercial  infrastructure  to  commercialize  ublituximab,  our  other  product  candidates,  and  additional
indications  of  UKONIQ,  if  approved,  by  increasing  the  size  of  our  sales  force  and/or  entering  into  collaborations  with  third
parties; and

● achieve  market  acceptance  of  UKONIQ  and  our  product  candidates,  if  approved,  in  the  medical  community  and  with  third-

party payors.

If we are unable to generate significant and sustained revenues, we will not become profitable and we will be unable to continue our

operations without continued funding.

We will need to raise substantial additional funding. If we are unable to raise capital when needed, we would be forced to delay, reduce or
eliminate some of our drug development programs or commercialization efforts.

The  development  of  pharmaceuticals  is  capital-intensive.  We  are  currently  advancing  our  most  advanced  drug  candidates,
ublituximab,  cosibelimab,  TG-1701  and  TG-1801,  and  UKONIQ  for  additional  indications  through  clinical  development.  While  we  may
experience short-term decreases in clinical trial expenses as our larger Phase 3 clinical trials complete and before our Phase 1 and 2 programs
can  advance  into  Phase  2  and  3,  we  do  expect  over  time  our  overall  expenses  will  increase  in  connection  with  our  ongoing  activities,
particularly as we continue the research and development of, initiate or continue clinical trials of, seek marketing approval for, and expand
our infrastructure to commercialize our product candidates and additional indications of UKONIQ. Moreover, in anticipation of submitting
applications for regulatory approvals for UKONIQ and ublituximab in chronic lymphocytic leukemia (CLL) and for ublituximab in relapsing
multiple sclerosis (MS), we will need to expend substantial resources on manufacturing and biologics license application (BLA) preparation
over the next 12 to 18 months, which could exceed any cost savings associated with lower clinical trial expenses during the same period.

While this timing is our current estimate, the amount and timing of our future funding requirements will depend on many factors,

including, but not limited to, the following:

● the progress of our clinical trials, including expenses to support the trials and milestone payments that may become payable

under our license agreements;

● developments relating to the COVID-19 pandemic in the U.S. and around the world;
● the costs and timing of regulatory approvals;
● the costs and timing of clinical and commercial manufacturing supply arrangements for each product and product candidate;
● the costs of expanding our sales or distribution capabilities;
● the success of the commercialization of UKONIQ and any product candidates, if approved;
● our ability to establish and maintain strategic collaborations, including licensing and other arrangements;
● the costs involved in enforcing or defending patent claims or other intellectual property rights; and
● the extent to which we in-license or invest in other indications or product candidates.

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As a result, significant additional funding will be required. Additional sources of financing to continue our operations in the future
might not be available on favorable terms, if at all. If we do not succeed in raising additional funds on acceptable terms, we might be unable
to complete planned preclinical studies and clinical trials or obtain approval of any of our product candidates from the FDA or any foreign
regulatory authorities. In addition, we could be forced to discontinue product development, reduce or forego sales, marketing and medical
educational efforts that are required for a successful launch of UKONIQ, ublituximab (if approved), or any of our other product candidates
and  otherwise  forego  attractive  business  opportunities.  Any  additional  sources  of  financing  will  likely  involve  the  issuance  of  our  equity
securities, which would have a dilutive effect to stockholders. Currently, other than UKONIQ, our products are investigational and have not
been approved by the FDA or any foreign regulatory authority for sale. Therefore, for the foreseeable future, we will have to fund all of our
operations and capital expenditures from sales of UKONIQ in the U.S., cash on hand and amounts raised in future offerings or financings.
Accordingly,  our  prospects  must  be  considered  in  light  of  the  uncertainties,  risks,  expenses  and  difficulties  frequently  encountered  by
companies in the early stages of operations and the competitive environment in which we operate.

Raising  additional  capital  may  cause  dilution  to  our  stockholders,  restrict  our  operations  or  require  us  to  relinquish  rights  to  our
technologies or drug candidates and occupy valuable management time and resources.

Until such time, if ever, as we can generate substantial drug revenues, we expect to finance our cash needs through a combination of
public  and  private  equity  offerings,  debt  financings,  collaborations,  strategic  alliances  and  licensing  arrangements.  We  do  not  have  any
committed  external  source  of  funds,  other  than  funds  already  borrowed  under  the  loan  and  security  agreement  that  we  entered  into  with
Hercules in February 2019 (see Note 7 to our consolidated financial statements for more information). To the extent that we raise additional
capital  through  the  sale  of  common  stock  or  securities  convertible  or  exchangeable  into  common  stock,  the  ownership  interest  of  our
stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that materially adversely affect the
rights of our common stockholders. We may also seek funds through collaborations, strategic alliances or licensing arrangements with third
parties at a time that is not desirable to us and we may be required to relinquish valuable rights to some intellectual property, future revenue
streams, research programs or drug candidates or to grant licenses on terms that may not be favorable to us, any of which may have a material
adverse effect on our business, operating results and prospects. Debt 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. See our risk factors below under the heading “Risks Related to Our Indebtedness”.

Additionally, fundraising efforts may divert our management from their day-to-day activities, which may adversely affect our ability
to develop and commercialize our drug candidates. Dislocations in the financial markets have generally made equity and debt financing more
difficult  to  obtain  and  may  have  a  material  adverse  effect  on  our  ability  to  meet  our  fundraising  needs.  We  cannot  guarantee  that  future
financing  will  be  available  in  sufficient  amounts  or  on  terms  acceptable  to  us,  if  at  all.  Moreover,  the  issuance  of  additional  securities,
whether equity or debt, by us, or the possibility of such issuance, may cause the market price of our shares to decline.

All commercialization and product candidate development timelines and projections in this report are based on the assumption of further
financing.

The timelines and projections in this report are predicated upon the assumption that we will raise additional financing in the future to
continue our commercialization efforts and the development of our product candidates. In the event we do not successfully raise subsequent
financing, our commercialization and product development activities will necessarily be curtailed commensurate with the magnitude of the
shortfall. If our commercialization or product development activities are slowed or stopped, we would be unable to meet the timelines and
projections  outlined  in  this  filing.  Failure  to  progress  our  commercialization  activities  or  the  development  of  our  product  candidates  as
anticipated will have a negative effect on our business, future prospects, and ability to obtain further financing on acceptable terms, if at all,
and the value of the enterprise.

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 Due to limited resources we may fail to capitalize on programs or product candidates that may present a greater commercial opportunity
or for which there is a greater likelihood of success.

Because we have limited resources, we may forego or delay pursuit of opportunities with certain programs or product candidates or
for  indications  that  later  prove  to  have  greater  commercial  potential.  Our  estimates  regarding  the  potential  market  for  a  product  candidate
could  be  inaccurate,  and  our  spending  on  current  and  future  research  and  development  programs  may  not  yield  any  commercially  viable
products. If we do not accurately evaluate the commercial potential for a particular product candidate, we may relinquish valuable rights to
that  product  candidate  through  strategic  collaboration,  licensing  or  other  arrangements  in  cases  in  which  it  would  have  been  more
advantageous  for  us  to  retain  sole  development  and  commercialization  rights  to  such  product  candidate.  Alternatively,  we  may  allocate
internal  resources  to  a  product  candidate  in  a  therapeutic  area  in  which  it  would  have  been  more  advantageous  to  enter  into  a  partnering
arrangement.

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

Our level of indebtedness and debt service obligations could adversely affect our financial condition and may make it more difficult for us
to fund our operations.

In February 2019, we entered into a Loan and Security Agreement (the “Loan Agreement”), with Hercules Capital, Inc., a Maryland
corporation (“Hercules”) (see Note 7 to our consolidated financial statements for more information). Under the Loan Agreement, Hercules
will provide access to term loans with an aggregate principal amount of up to $60.0 million (the “Term Loan”). Concurrently with the closing
of the Loan Agreement, we borrowed an initial tranche of $30.0 million. As of December 31, 2020, we had outstanding obligations of $30
million  under  the  Loan  Agreement.  In  addition,  we  have  incurred  short-term  liabilities  of  approximately  $19.4  million  with  a  contract
manufacturing organization (CMO) for the scale-up, tech-transfer, and long-term supply of one of our drug candidates. This is an expensive
and lengthy process and we expect to incur additional obligations associated with these ongoing manufacturing activities over the course of
the next 24 months, and potentially longer. To date, this CMO has provided payment terms which we believe are reasonable; however, no
assurance  can  be  given  that  such  terms  will  continue  to  be  available  to  us  in  the  future.  No  assurances  can  be  made  that  the  obligations
associated with the Loan Agreement and the CMO will not have a material adverse impact on our financial condition.

All obligations under the Loan Agreement are secured by substantially all of our existing property and assets, excluding intellectual
property. This indebtedness may create additional financing risk for us, particularly if our business or prevailing financial market conditions
are  not  conducive  to  paying  off  or  refinancing  its  outstanding  debt  obligations  at  maturity.  This  indebtedness  could  also  have  important
negative consequences, including:

● we will need to repay the indebtedness by making payments of interest and principal, which will reduce the amount of money

available to finance our operations, our research and development efforts and other general corporate activities; and

● our failure to comply with the restrictive covenants in the Loan Agreement could result in an event of default that, if not cured
or waived, would accelerate our obligation to repay this indebtedness, and Hercules could seek to enforce its security interest in
the assets securing such indebtedness.

To the extent additional debt is added to our current debt levels, the risks described above could increase.

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We may not have cash available in an amount sufficient to enable us to make interest or principal payments on our indebtedness when
due. 

Failure to satisfy our current and future debt obligations under the Loan Agreement, or the breach of any of its covenants, subject to
specified cure periods with respect to certain breaches, could result in an event of default and, as a result, Hercules could accelerate all of the
amounts due. In the event of an acceleration of amounts due under the Loan Agreement as a result of an event of default, we may not have
enough available cash or be able to raise additional funds through equity or debt financings to repay such indebtedness at the time of such
acceleration. In that case, we may be required to delay, limit, reduce or terminate our product candidate development or commercialization
efforts or grant to others rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.
Hercules  could  also  exercise  its  rights  as  collateral  agent  to  take  possession  and  dispose  of  the  collateral  securing  the  Term  Loan  for  its
benefit,  which  collateral  includes  substantially  all  of  our  property  other  than  intellectual  property.  Our  business,  financial  condition  and
results of operations could be materially adversely affected as a result of any of these events.

The Loan Agreement imposes operating and other restrictions on the Company. Such restrictions will affect, and in many respects

limit or prohibit, our ability and the ability of any future subsidiary to, among other things: 

● dispose of certain assets;
● change its lines of business;
● engage in mergers, acquisitions or consolidations;
● incur additional indebtedness;
● create liens on assets;
● pay dividends and make contributions or repurchase our capital stock; and
● engage in certain transactions with affiliates.

The breach of any of these restrictive covenants could have a material adverse effect on our business and prospects.

Risks Related to Drug Development and Regulatory Approval

If we are unable to obtain regulatory approval for our product candidates and ultimately cannot commercialize one or more of them, or
experience significant delays in doing so, our business will be materially harmed.

We  have  invested  substantially  all  of  our  efforts  and  financial  resources  in  the  identification  and  pre-clinical  and  clinical
development  of  UKONIQ  and  our  product  candidates,  including  ublituximab,  cosibelimab,  TG-1701  and  TG-1801,  and  building  a
commercial infrastructure. Our ability to generate revenues from product sales will depend completely on the successful completion of our
current and future Phase 3 and registration-directed clinical trials and commercialization of our product candidates and additional indications
of UKONIQ, which may never occur.  Each of our product candidates will require additional non-clinical or clinical development, regulatory
approval in multiple jurisdictions, and obtaining sufficient clinical and commercial supply.  The success of our development programs and
achievement of regulatory approval of our product candidates will depend on several factors, including the following:

● successful completion of our clinical programs with positive results that support a finding of effectiveness and an acceptable

safety profile of our product candidates in the intended populations within the timeframes we have projected;

● INDs or clinical trial applications, or CTAs, being cleared such that our product candidates can commence clinical trials;
● successful initiation and completion of preclinical studies and successful initiation of, enrollment in and completion of clinical

trials;

● successful preparation of the Biologics License Application (BLA) and the complete data sets from the UNITY-CLL trial and

ULTIMATE I and II trials for regulatory submission within the timeframes we have projected;

● sufficiency of our financial and other resources to complete the necessary preclinical studies and clinical trials;
● receipt of regulatory approvals from applicable regulatory authorities for our product candidates;
● establishing  commercially  viable  arrangements  with  third-party  manufacturers  for  clinical  supply  and  commercial

manufacturing; and

● obtaining and maintaining patent and trade secret protection or regulatory exclusivity for our product candidates.

If we do not achieve one or more of these factors in a timely manner or at all, we could experience significant delays in our clinical

programs and regulatory submission timelines and may not be able to obtain regulatory approval for our product candidates.

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 Because results of preclinical studies and early clinical trials are not necessarily predictive of future results, any product candidate we
advance  may  not  have  favorable  results  in  later  clinical  trials  or  receive  regulatory  approval.    Moreover,  interim,  “top-line,”  and
preliminary  data  from  our  clinical  trials  that  we  announce  or  publish  may  change,  or  the  perceived  product  profile  may  be  negatively
impacted, as more patient data or additional endpoints (including efficacy and safety) are analyzed.

Pharmaceutical development has inherent risks. The outcome of preclinical development testing and early clinical trials may not be
predictive  of  the  outcome  of  later  clinical  trials,  and  interim  results  of  a  clinical  trial  do  not  necessarily  predict  final  results.  Moreover,
preclinical  and  clinical  data  are  often  susceptible  to  varying  interpretations  and  analyses,  and  many  companies  that  have  believed  their
product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of
their  product  candidates.  Once  a  product  candidate  has  displayed  sufficient  preclinical  data  to  warrant  clinical  investigation,  we  will  be
required to demonstrate through adequate and well-controlled clinical trials that our product candidates are effective with a favorable benefit-
risk profile for use in populations for their target indications before we can seek regulatory approvals for their commercial sale. Many drug
candidates  fail  in  the  early  stages  of  clinical  development  for  safety  and  tolerability  issues  or  for  insufficient  clinical  activity,  despite
promising pre-clinical results. Accordingly, no assurance can be made that a safe and efficacious dose can be found for these compounds or
that  they  will  ever  enter  into  advanced  clinical  trials  alone  or  in  combination  with  other  product  candidates.    Moreover,  success  in  early
clinical  trials  does  not  mean  that  later  clinical  trials  will  be  successful  because  product  candidates  in  later-stage  clinical  trials  may  fail  to
demonstrate  sufficient  safety  or  efficacy  despite  having  progressed  through  initial  clinical  testing.  Companies  frequently  experience
significant setbacks in advanced clinical trials, even after earlier clinical trials have shown promising results. There is an extremely high rate
of failure of pharmaceutical candidates proceeding through clinical trials.

Individually  reported  outcomes  of  patients  treated  in  clinical  trials  may  not  be  representative  of  the  entire  population  of  treated
patients in such studies. In addition, larger scale Phase 3 studies, which are often conducted internationally, are inherently subject to increased
operational risks compared to earlier stage studies, including the risk that the results could vary on a region to region or country to country
basis,  which  could  materially  adversely  affect  the  outcome  of  the  study  or  the  opinion  of  the  validity  of  the  study  results  by  applicable
regulatory agencies.

From time to time, we may publicly disclose top-line or preliminary data from our clinical trials, which is based on a preliminary
analysis of then available data, and the results and related findings and conclusions are subject to change following a more comprehensive
review of the data related to the particular study or trial. We also make assumptions, estimations, calculations and conclusions as part of our
analyses of such data, and we may not have received or had the opportunity to fully and carefully evaluate all data from the particular study
or trial, including all endpoints and safety data. As a result, top-line or preliminary results that we report may differ from future results of the
same studies, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated.
Top-line  or  preliminary  data  also  remain  subject  to  audit  and  verification  procedures  that  may  result  in  the  final  data  being  materially
different  from  the  topline,  interim,  or  preliminary  data  we  previously  published.  When  providing  top-line  results,  we  may  disclose  the
primary endpoint of a study before all secondary endpoints have been fully analyzed.  A positive primary endpoint does not translate to all, or
any, secondary endpoints being met. As a result, top-line and preliminary data should be viewed with caution until the final data are available,
including data from the full safety analysis and the final analysis of all endpoints.  

Further,  from  time  to  time,  we  may  also  disclose  interim  data  from  our  preclinical  studies  and  clinical  trials.  Interim  data  from
clinical  trials  that  we  may  complete  are  subject  to  the  risk  that  one  or  more  of  the  clinical  outcomes  may  materially  change  as  patient
enrollment  continues  and  more  patient  data  become  available.  For  example,  time-to-event  based  endpoints  such  as  duration  of  response
(DOR) and PFS have the potential to change, sometimes drastically, with longer follow-up. In addition, as patients continue on therapy, there
can be no assurance given that the final safety data from studies, once fully analyzed, will be consistent with prior safety data presented, will
be  differentiated  from  other  similar  agents  in  the  same  class,  will  support  continued  development,  or  will  be  favorable  enough  to  support
regulatory  approvals  for  the  indications  studied.    Further,  others,  including  regulatory  agencies,  may  not  accept  or  agree  with  our
assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact
the value of the particular program, the approvability or commercialization of the particular product candidate or product and our company in
general.  The information we choose to publicly disclose regarding a particular study or clinical trial is based on what is typically extensive
information, and regulators or others may not agree with what we determine is material or otherwise appropriate information to include in our
disclosure. If the interim, top-line or preliminary data that we report differ from final results, or if others, including regulatory authorities,
disagree  with  the  conclusions  reached,  our  ability  to  obtain  approval  for,  or  successfully  commercialize,  our  product  candidates  may  be
harmed, which could harm our business, operating results, prospects or financial condition.

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Many of the results reported in our early clinical trials rely on local investigator-assessed efficacy outcomes which may be subject to
greater variability or subjectivity than results assessed in a blinded, independent, centrally reviewed manner, often required of later phase,
adequate  and  well-controlled  registration-directed  clinical  trials.  If  the  results  from  our  registration-directed  trials  are  different  from  the
results  found  in  the  earlier  studies,  we  may  need  to  terminate  or  revise  our  clinical  development  plan,  which  could  extend  the  time  for
conducting our development program and could have a material adverse effect on our business.

Clinical  drug  development  involves  a  lengthy  and  expensive  process,  with  an  uncertain  outcome.  We  may  incur  additional  costs  or
experience delays in completing, or ultimately be unable to complete, the development and commercialization of our product candidates.

Before  obtaining  marketing  approval  from  regulatory  authorities  for  the  sale  of  any  product  candidate,  we  must  complete  pre-
clinical studies and then conduct extensive clinical trials to demonstrate the safety and efficacy of our product candidates in humans. Clinical
testing is expensive, difficult to design and implement, can take many years to complete and is uncertain as to outcome. It is impossible to
predict  when  or  if  our  product  candidates  will  prove  effective  and  safe  in  humans  or  will  receive  regulatory  approval  or  will  have  a
differentiated  safety  and  tolerability  profile.  A  failure  of  one  or  more  clinical  trials  can  occur  at  any  stage  of  testing.   Accordingly,  our
ongoing trials and future clinical trials may not be successful.  Even if our clinical trials produce positive results, there can be no guarantee
that  the  positive  outcomes  will  be  replicated  in  future  studies  either  within  the  same  indication  as  previously  evaluated  or  in  alternate
indications and settings.  

Successful  completion  of  our  clinical  trials  is  a  prerequisite  to  submitting  a  New  Drug  Application  (NDA)  or  a  Biologics  License
Application  (BLA)  to  the  FDA  and  a  Marketing  Authorization  Application  (MAA)  to  the  European  Medicines  Agency  (EMA)  for  each
product candidate and, consequently, the ultimate approval and commercial marketing of our product candidates. We do not know whether
any of our ongoing or future clinical trials for our product candidates will be completed on schedule, if at all.

Whether or not and how quickly we complete clinical trials depends in part upon the rate at which we are able to engage clinical
research/trial sites and, thereafter, the rate of enrollment of patients, and the rate at which we collect, clean, lock and analyze the clinical trial
database. Patient enrollment is a function of many factors, including the size of the patient population, the proximity of patients to clinical
sites, the eligibility criteria for the study, the existence of competitive clinical trials, and whether existing or new drugs are approved for the
indication we are studying. We are aware that other companies are currently conducting or planning clinical trials that seek to enroll patients
with the same diseases that we are studying. We may experience numerous unforeseen events, such as the COVID-19 pandemic, that could
delay or prevent our ability to complete current clinical trials, initiate new trials, receive marketing approval or commercialize our product
candidates, including:

● the  FDA  or  other  regulatory  authorities  may  require  us  to  submit  additional  data  or  impose  other  requirements  before

permitting us to initiate a clinical trial;

● the FDA or other regulatory authorities or institutional review boards (IRBs) or ethics committees (ECs) may not authorize us
or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site or in a country; we may
experience  delays  in  reaching,  or  fail  to  reach,  agreement  on  acceptable  terms  with  prospective  trial  sites  and  prospective
CROs, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial
sites;

● clinical trials of our drug candidates may produce negative or inconclusive results, and we may decide, or regulatory authorities
may  require  us,  to  conduct  additional  pre-clinical  studies  or  clinical  trials  or  we  may  decide  to  abandon  drug  development
programs;

● the number of patients required for clinical trials of our drug candidates may be larger than we anticipate, and enrollment in
these clinical trials may be slower than we anticipate or participants may drop out of these clinical trials or fail to return for
post-treatment follow-up at a higher rate than we anticipate;

● our  third-party  contractors,  including  our  clinical  trial  sites,  may  fail  to  comply  with  regulatory  requirements  or  meet  their
contractual obligations to us in a timely manner, or at all, or may deviate from the clinical trial protocol or drop out of the trial,
which may require that we add new clinical trial sites or investigators;

● we may elect to or regulatory authorities or IRBs or ECs may require that we or our investigators suspend or terminate clinical
research for various reasons, including noncompliance with regulatory requirements or a finding that the participants are being
exposed to unacceptable health risks;

● the cost of clinical trials of our product candidates may be greater than we anticipate;

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● the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our product candidates
may be insufficient or inadequate, including, without limitation, as a result of disruptions to our supply chains caused by the
COVID-19 pandemic and related work stoppages across the globe;

● regulatory authorities may revise the requirements for approving our product candidates, or such requirements may not be as

we anticipate; and

● our product candidates may have undesirable side effects or other unexpected characteristics, causing us or our investigators,
regulatory authorities, IRBs or ECs to suspend or terminate the trials, or reports may arise from pre-clinical or clinical testing of
other therapies in the same or a similar class that raise safety or efficacy concerns about our product candidates.

We also could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs of the institutions in which such trials
are being conducted, by the DSMB for such trial or by the FDA or other regulatory authorities. Such regulatory authorities may impose a
suspension or termination due to a number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements
or  our  clinical  protocols,  inspection  of  the  clinical  trial  operations  or  trial  site  by  the  FDA  or  other  regulatory  authorities  resulting  in  the
imposition of a clinical hold, unforeseen safety issues or adverse side effects, failure to demonstrate a benefit from using a drug, changes in
governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial. The DSMB for our clinical trials
may recommend modification to the study design or closure of the study entirely based on the DSMB’s interpretation of the benefit/risk of
the  study.    While  we  develop  charters  that  guide  the  nature  of  the  DSMB  meetings,  their  analysis  and  interpretation  of  study  data  occurs
independently from us and is wholly within their control.  Even if the DSMB finds no safety concerns and recommends no modifications to
the ongoing study, this does not mean the safety profile reported in the study may support a marketing approval or commercial acceptance if
marketing approval is granted. Many of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may
also ultimately lead to the denial of regulatory approval of our product candidates.

Further, the FDA or other regulatory authorities may disagree with or not accept our clinical trial design, may have questions about
the potential impact of our study design on conclusions that can be drawn from the data, may interpret results differently than we do, and may
change its view on the criteria that must be met for approval over time. This could happen even for a protocol that has received a SPA, as is
the  case  for  some  of  our  studies.  In  September  2015,  we  announced  a  Phase  3  clinical  trial  for  U2  for  patients  with  CLL,  which  is  being
conducted  pursuant  to  a  SPA  with  the  FDA  (UNITY-CLL)  and  in  August  2017  we  announced  SPAs  for  the  ULTIMATE  I  and  II  studies
evaluating ublituximab in RMS. Many companies that have been granted SPAs have ultimately failed to obtain final approval to market their
drugs. Since we are seeking approvals under SPAs for some of our product registration strategies, based on protocol designs negotiated with
the  FDA,  we  may  be  subject  to  enhanced  scrutiny.  Further,  while  changes  or  amendments  to  protocols  are  common  during  conduct  of  a
clinical trial, protocol changes or amendments to a study that is being conducted under a SPA will have to be reviewed and approved by the
FDA to verify that the SPA agreement is still valid. The FDA’s willingness to agree to changes or amendments to a protocol or statistical
analysis  plan  under  a  SPA  agreement  is  wholly  within  the  FDA’s  discretion.    Such  reviews  also  provide  an  opportunity  for  the  FDA  to
scrutinize any aspect of the study design and conduct, even if previously agreed to under the existing SPA.  Failure to reach agreement with
the FDA for protocol changes or modifications for any study we conduct under a SPA could have a material negative impact to our ability to
execute these studies. Even if the primary endpoint in a Phase 3 clinical trial is achieved, a SPA does not guarantee approval.

Some  of  our  clinical  trials  may  be  conducted  as  open-label  studies,  meaning  that  trial  participants,  investigators,  site  staff,  some
employees  of  our  contract  research  organizations,  and  our  field-level  employees  (e.g.,  clinical  research  associates  and  monitors),  among
others, have knowledge of treatment arm assignments on a patient-level, which has the potential to introduce bias into study conduct. Further,
even when our clinical trials are double-blind, double-dummy studies, unblinding of treatment arm assignment may occur from time to time,
for example, on the occurrence of unexpected safety events which may necessitate understanding of study treatment.  While we believe we
have  put  in  place  adequate  firewalls  to  prevent  inappropriate  unblinding  of  study  data  consistent  with  standard  industry  practice  for  these
types of studies, no assurance can be given that issues related to study conduct will not be raised. The FDA may raise issues of safety, study
conduct, bias, deviation from the protocol, statistical power, patient completion rates, changes in scientific or medical parameters or internal
inconsistencies in the study design or data prior to making its final decision. The FDA may also seek the guidance of an outside advisory
committee in evaluating (among other things) clinical data and safety and effectiveness considerations prior to making its final decision.

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Negative or inconclusive results from the clinical trials we conduct or unanticipated adverse medical events could cause us to have
to repeat or terminate the clinical trials. If we are required to repeat or conduct additional clinical trials or other testing of our drug candidates
beyond those that we currently contemplate, if we are unable to successfully complete clinical trials of our drug candidates or other testing, if
the results of these trials or tests are not positive or are only modestly positive or if there are safety concerns, we may:

● be delayed in obtaining marketing approval for our product candidates;
● not obtain marketing approval at all;
● obtain marketing approval in some countries and not others;
● obtain approval for indications or patient populations that are not as broad as intended or desired;
● be subject to post-marketing requirements or post-marketing commitments;
● be subject to increased pricing pressure; or
● have the drug removed from the market after obtaining marketing approval.

Our drug development costs will also increase if we experience delays in testing or regulatory approvals. Certain clinical trials are
designed to continue until a pre-determined number of events have occurred in the patients enrolled. Trials such as this are subject to delays
stemming from patient withdrawal and from lower than expected event rates. Significant clinical trial delays could also shorten any periods
during which we may have the exclusive right to commercialize our product candidates or allow our competitors to bring products to market
before we do and impair our ability to successfully commercialize our product candidates. Any delays in our pre-clinical or future clinical
development  programs  may  harm  our  business,  financial  condition  and  prospects  significantly.  We  may  also  incur  additional  costs  if
enrollment  is  increased.      All  of  our  current  Phase  3  and  registration-directed  clinical  trials,  such  as  UNITY-CLL,  UNITY-NHL  and
ULTIMATE I and II, enrolled a larger number of patients than our initial projections, adding significant costs to those studies over and above
what had been projected.

In addition, principal investigators for our clinical trials may serve as scientific advisors or consultants to us from time to time and
receive  compensation  in  connection  with  such  services.  If  these  relationships  and  any  related  compensation  result  in  perceived  or  actual
conflicts of interest, the integrity of the data generated at the applicable clinical trial site, or the FDA’s willingness to accept such data, may be
jeopardized.

Our  product  candidates  may  cause  undesirable  side  effects  that  could  delay  or  prevent  their  regulatory  approval,  or  impact  their
availability and commercial potential after approval.

Unacceptable  or  undesirable  adverse  events  caused  by  any  of  our  product  candidates  that  we  take  into  clinical  trials  could  cause
either us, a DSMB, or regulatory authorities to interrupt, delay, modify or halt clinical trials and could result in a more restrictive label or the
delay or denial of regulatory approval by the FDA or other regulatory authorities. This, in turn, could prevent us from commercializing the
affected product candidate and generating revenues from its sale.

As is the case with all drugs, it is likely that there will be side effects associated with the use of our drug candidates. Results of our
trials  could  reveal  a  higher  than  expected  and  unacceptable  severity  and  prevalence  of  side  effects.  In  such  an  event,  our  trials  could  be
suspended or terminated and the FDA or comparable foreign regulatory authorities could order us to cease further development of or deny
approval of our drug candidates for any or all targeted indications. The drug-related side effects could also affect patient recruitment or the
ability of enrolled patients to complete the trial or result in potential product liability claims. In addition, data may emerge, from confirmatory
or  other  post-marketing  studies,  or  from  pharmacovigilance  reporting,  as  products  are  used  more  widely,  or  for  a  longer  duration,  after
approval that may affect the commercial potential of our products.  Any of these occurrences may harm our business, financial condition and
prospects significantly.

Many  compounds  that  initially  showed  promise  in  early  stage  testing  have  later  been  found  to  cause  side  effects  that  prevented
further development of the compound. Further, early clinical trials by their nature utilize a small sample of the potential patient population.
With  a  limited  number  of  patients  and  limited  duration  of  exposure,  rare  and  severe  side  effects  of  our  drug  candidates  may  only  be
uncovered when a significantly larger number of patients are exposed to the drug candidate in Phase 3 or registration-directed trials or when
the drug candidate is on the market.  If any of our product candidates cause unacceptable adverse events in clinical trials, we may not be able
to  obtain  marketing  approval  and  generate  revenues  from  its  sale,  or  even  if  approved  for  sale  may  lack  differentiation  from  competitive
products, which could have a material adverse impact on our business and operations.

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Many  of  our  ongoing  and  planned  clinical  studies  involve  combinations  of  two  or  more  drugs.  In  drug-combination  clinical
development,  there  is  an  inherent  risk  of  drug-drug  interactions  between  combination  agents  that  may  affect  each  component’s  individual
pharmacologic  properties  and  the  overall  efficacy  and  safety  of  the  combination  regimen.  Both  ublituximab  and  UKONIQ  are  being
evaluated in combination with each other, as well as with a variety of other active anti-cancer agents, which may cause unforeseen toxicity, or
impact the severity, duration, and incidence of adverse events observed compared to those seen in the single-agent studies of these agents. We
also intend to explore multiple combination studies involving cosibelimab, TG-1701, and TG-1801. Further, with multi-drug combinations, it
is often difficult to interpret or properly assign attribution of an adverse event to any one particular agent, introducing the risk that toxicity
caused by a component of a combination regimen could have a material adverse impact on the development of our product candidates. There
can be no assurances given that the combination regimens being studied will display tolerability or efficacy suitable to warrant further testing
or produce data that is sufficient to obtain marketing approval.

 Any product candidates we may advance through 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.

The  clinical  development,  manufacturing,  labeling,  packaging,  storage,  record-keeping,  advertising,  promotion,  import,  export,
marketing and distribution, and pharmacovigilance and adverse event reporting of our product candidates or any future product candidates are
subject to extensive regulation by the FDA in the United States and by comparable regulatory authorities worldwide. In the United States, we
are not permitted to market a product candidate until we receive approval of a BLA or NDA from the FDA. The process of obtaining a BLA
or  NDA  approval  is  expensive,  often  takes  many  years,  and  can  vary  substantially  based  upon  the  type,  complexity  and  novelty  of  the
products  involved.  Approval  policies  or  regulations  may  change,  and  the  FDA  has  substantial  discretion  in  the  pharmaceutical  product
approval process, including the ability to delay, limit or deny approval of a product candidate for many reasons. In addition, the FDA may
require  post-marketing  studies,  including  drug  interaction  studies  or  clinical  trials  which  also  may  be  costly.  For  example,  as  part  of  the
accelerated  approval  of  UKONIQ  for  relapsed  or  refractory  MZL  and  FL,  continued  approval  for  those  indications  is  contingent  upon
verification  and  description  of  clinical  benefit  in  a  confirmatory  trial.    The  FDA  approval  for  a  limited  indication  with  required  warning
language, such as a boxed warning, could significantly impact our ability to successfully market our product candidates. Finally, the FDA
may require adoption of a Risk Evaluation and Mitigation Strategies (REMS) requiring prescriber training or a post-marketing registry or
may restrict the marketing and dissemination of these products. Despite the time and expense invested in the clinical development of product
candidates,  regulatory  approval  is  never  guaranteed.  Assuming  successful  clinical  development,  we  intend  to  seek  product  approvals  in
countries outside of the United States. As a result, we would be subject to regulation by the EMA, as well as the other regulatory agencies in
these countries.

Approval procedures vary among countries and can involve additional product testing and additional administrative review periods.
The time required to obtain approval in other countries might differ from that required to obtain FDA approval.  Interruptions or delays in the
operations of the FDA and foreign regulatory authorities as a result of the COVID-19 pandemic may negatively impact review, inspection,
and approval timelines.  Regulatory approval in one country does not ensure regulatory approval in another, but a failure or delay in obtaining
regulatory approval in one country may negatively impact the regulatory process in others. As in the United States, the regulatory approval
process in Europe and in other countries is lengthy and challenging. The FDA, and any other regulatory body around the world, can delay,
limit or deny approval of a product candidate for many reasons, including:

● the  FDA  or  comparable  foreign  regulatory  authorities  may  disagree  with  the  study  design  or  implementation  of  our  clinical

trials;

● we  may  be  unable  to  demonstrate  to  the  satisfaction  of  the  FDA  or  comparable  foreign  regulatory  authorities  that  a  product

candidate is tolerable 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  or  comparable  foreign

regulatory authorities for approval;

● we may be unable to demonstrate that a product candidate’s clinical and other benefits outweigh its safety risks;
● the  FDA  or  comparable  foreign  regulatory  authorities  may  disagree  with  our  interpretation  of  data  from  preclinical  studies

and/or clinical trials;

● the data collected from clinical trials of our product candidates may not be sufficient to support the submission of a BLA, NDA

or other marketing authorization submission or to obtain regulatory approval in the United States or elsewhere;

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

● the  approval  policies  or  regulations  of  the  FDA  or  comparable  foreign  regulatory  authorities  may  significantly  change  in  a

manner rendering our clinical data insufficient for approval.

Regulatory approvals for our product candidates may not be obtained without lengthy delays, if at all. Any delay in obtaining, or

inability to obtain, applicable regulatory approvals would prevent us from commercializing our product candidates.

A  breakthrough  therapy  or  Fast  Track  designation  by  the  FDA  may  not  actually  lead  to  a  faster  development  or  regulatory  review  or
approval process.

We may seek breakthrough therapy or Fast Track designation for some of our drug candidates.   For example, in January 2019, the
FDA granted breakthrough therapy designation to UKONIQ for the treatment of adult patients with marginal zone lymphoma (MZL) who
have received at least one prior anti-CD20 regimen, and in October 2020, the FDA granted Fast Track designation to the investigation of
ublituximab in combination with UKONIQ for the treatment of adult patients with CLL. If a drug is intended for the treatment of a serious or
life-threatening condition and the drug demonstrates the potential to address unmet medical needs for this condition, the sponsor may apply
for breakthrough therapy or Fast Track designations. The FDA has broad discretion whether or not to grant these designations, so even if we
believe a particular drug candidate is eligible for such a designation, we cannot be sure that the FDA would decide to grant it. Even if we
receive breakthrough therapy or Fast Track designation for a drug candidate, we may not experience a faster development process, review or
approval compared to conventional FDA procedures. Neither breakthrough therapy nor Fast Track designation guarantees priority review of
an NDA or BLA application, and therefore despite receiving a Fast Track designation for U2 for the treatment of adult patients with CLL,
there  can  be  no  guarantee  that  the  FDA  will  not  assign  a  standard  review  timeline  to  our  BLA  filing  for  this  indication.    The  FDA  may
withdraw a breakthrough therapy or Fast Track designation if it believes that the designation is no longer supported by data from our clinical
development program.  

We have received orphan drug designation for some of our drug candidates for specified indications, and we may seek additional orphan
drug designations for other indications and some of our other drug candidates. However, we may be unsuccessful in obtaining or may be
unable to maintain the benefits associated with orphan drug designation, including the potential for market exclusivity.

Ublituximab (as monotherapy) received orphan drug designation from the FDA for the treatment of MZL (nodal and extranodal) in
September 2013, for the treatment of CLL in August 2010, and received orphan drug designation by the EMA for the treatment of CLL in
November  2009.  We  also  obtained  orphan  drug  designation  for  UKONIQ  (as  monotherapy)  for  the  treatment  of  CLL  in  August  2016,  all
three  types  of  MZL  (nodal,  extranodal  and  splenic)  in  April  2019,  and  FL  in  March  2020.  In  January  2017,  we  announced  that  the  FDA
granted orphan drug designation covering the combination of ublituximab and UKONIQ for the treatment of patients with CLL and DLBCL.
As  part  of  our  business  strategy,  we  may  seek  orphan  drug  designation  for  our  other  drug  candidates;  however,  we  may  be  unsuccessful.
Regulatory authorities in some jurisdictions, including the United States and the European Union, may designate drugs for relatively small
patient  populations  as  orphan  drugs.  Under  the  U.S.  Orphan  Drug  Act,  the  FDA  may  designate  a  drug  as  an  orphan  drug  if  it  is  a  drug
intended to treat a rare disease or condition, which is generally defined as a patient population of fewer than 200,000 individuals annually in
the United States, or a patient population greater than 200,000 in the United States where there is no reasonable expectation that the cost of
developing  the  drug  will  be  recovered  from  sales  in  the  United  States.  In  the  United  States,  orphan  drug  designation  entitles  a  party  to
financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and user-fee waivers.

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Generally,  if  a  product  with  an  orphan  drug  designation  subsequently  receives  the  first  marketing  approval  for  the  indication  for
which it has such designation, the product is entitled to a period of marketing exclusivity, which precludes FDA or EMA from approving
another marketing application for the same drug or biologic for that time period.  Even if we obtain orphan drug exclusivity for a drug, that
exclusivity may not effectively protect the designated drug from competition because different drugs can be approved for the same condition.
Even after an orphan drug is approved, the FDA can subsequently approve another product that meets the definition of a “same drug” under
21 C.F.R. 316.3 for the same condition if the FDA concludes that the later product is clinically superior in that it is shown to be safer, more
effective or makes a major contribution to patient care. In addition, a designated orphan drug may not receive orphan drug exclusivity if it is
approved  for  a  use  that  is  broader  than  the  indication  for  which  it  received  orphan  drug  designation.  Moreover,  orphan  drug  exclusive
marketing rights in the United States may be lost if the FDA exercises its authority to revoke orphan drug designation, which it may do on a
variety of grounds, including that the request contained an untrue statement of material fact or omitted material information, or that the drug
in  fact  was  not  eligible  for  orphan  drug  designation.  Orphan  drug  designation  neither  shortens  the  development  time  or  regulatory  review
time of a drug nor gives the drug any advantage in the regulatory review or approval process. While we intend to seek additional orphan drug
designation for our other drug candidates, we may never receive such designations. Even if we receive orphan drug designation for any of our
drug candidates, there is no guarantee that we will enjoy the benefits of those designations or obtain orphan drug exclusivity.

We are conducting clinical trials, and anticipate additional clinical trials, for product candidates at sites outside the United States, and the
FDA may not accept data from trials conducted in such locations.

Many  of  our  Phase  3  and  registration-directed  clinical  trials  such  as  UNITY-CLL,  UNITY-NHL  and  ULTIMATE  I  and  II  utilize
international clinical research sites, including sites in eastern European countries. We work with what we believe are reputable CROs and
clinical research sites in conducting our studies internationally. Nevertheless, there can be heightened challenges to monitoring and oversight
of global clinical trials and sponsors are subject to the risk that fraud, misconduct, incompetence, unexpected patient variability and other
issues affecting the reliability, quality, and outcome of studies. Such problems, if they were to occur, could negatively impact trial results, and
depending on the circumstances and scope of concerns could potentially even prevent a trial from being useful or acceptable for regulatory
approval. If such events were to occur with respect to any of our trials (and in particular with respect to registration-directed studies), they
would have a substantial negative impact on our business. 

An approval of one of our product candidates in the United States would not assure approval of that candidate in foreign jurisdictions.

The approval procedures for pharmaceuticals vary among countries and obtaining approval in one jurisdiction does not guarantee
approval in another jurisdiction.  For example, even if the FDA grants approval of a product candidate, comparable regulatory authorities in
foreign jurisdictions may not approve the same product candidate or may require additional evidence for approval.  In many countries outside
the  United  States,  the  product  must  be  approved  for  reimbursement  before  it  can  be  marketed.   As  a  general  matter,  however,  the  foreign
regulatory approval process involves risks similar or identical to the risks associated with the FDA approval discussed above.  Therefore, we
cannot guarantee that we, or future collaborators, will obtain approvals of our product candidates in any foreign jurisdiction on a timely basis,
if at all.  Failure to receive approval in certain foreign markets could significantly impact the full market potential of our product candidates.
 Furthermore, if we obtain regulatory approval for a product candidate in a foreign jurisdiction, we will be subject to the burden of complying
with complex regulatory, legal, and other requirements that could be costly and could subject us to additional risks and uncertainties.

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We have product candidates still under development and are also preparing for commercial manufacturing activities, and as such clinical
and  commercial  manufacturing  site  additions,  scale-up  and  process  improvements  implemented  in  the  production  of  those  product
candidates may affect their ultimate activity or function.

Generally, our product candidates are currently manufactured in relatively small batches for use in pre-clinical and clinical studies.
Process improvements implemented to date have changed, and process improvements in the future may change, the activity and/or analytical
profile  of  the  product  candidates,  which  may  affect  the  safety  and  efficacy  of  the  products.  For  instance,  the  manufacturing  process  for
ublituximab  has  undergone  several  process  improvements  during  the  clinical  trial  process  which  have  resulted  in  analytical  differences
between  the  materials.  Such  process  improvements  continued  during  the  conduct  of  the  Phase  3  study  and  materials  from  more  than  one
manufacturing process were utilized in the Phase 3 UNITY-CLL trial. While analytical differences exist between those materials, we do not
believe the differences will alter the safety or efficacy profile of ublituximab. However, it is possible that additional and/or different adverse
events may appear among patients exposed to drug product manufactured under one process compared to the other, or that adverse events
may arise with greater frequency, intensity and duration among patients exposed to drug product manufactured under one process compared
to the other. Additionally, the efficacy of ublituximab may also be negatively impacted by such process changes. Given the uncertainty of the
impact on product specifications, quality and performance, process improvements made during Phase 3 development carry a higher level of
risk than those made prior to Phase 3 development. If there are significant differences in product attributes between the two materials, we
may need to adjust our statistical analysis plans of the Phase 3 study to confirm that there is no difference in safety or efficacy between the
product  made  by  each  process  in  order  to  allow  us  to  utilize  data  from  all  enrolled  patients,  as  well  as  be  able  to  integrate  clinical  safety
and/or efficacy results across studies to support any potential marketing application. There can be no assurance given that such analyses will
be  successful  in  demonstrating  that  there  are  no  clinical  differences  between  these  drug  products,  which  could  substantially  impact  the
approvability of the combination of UKONIQ and ublituximab based on the results of the UNITY-CLL study. In such circumstances, that
would have a material adverse effect on the Company.

Further, no assurance can be given that the material manufactured from any future optimized processes, if any, for ublituximab or
any of our product candidates will perform comparably to the product candidates as manufactured to date which could result in an unexpected
safety or efficacy outcome as compared to the data published or presented to date. Similarly, following each round of process improvements,
if any, for any of our drug candidates, future clinical trial results conducted with the new material will be subject to uncertainty related to the
effects, if any, of those additional process improvements that were made.

In addition, we have engaged a secondary manufacturer for ublituximab to meet our current clinical and future commercial needs
and anticipate engaging additional manufacturing sources for UKONIQ to meet expanded clinical trial and projected commercial needs. If a
secondary  manufacturer  is  not  successful  in  replicating  the  product  or  experiences  delays,  or  if  regulatory  authorities  impose  unforeseen
requirements with respect to product comparability from multiple manufacturing sources, we may experience delays in clinical development.
No assurance can be given that any additional manufacturers will be successful or that material manufactured by the additional manufacturers
will  perform  comparably  to  ublituximab  or  UKONIQ  as  manufactured  to  date  and  used  in  currently  available  pre-clinical  data  and  or  in
clinical  trials  presented  publicly  or  reported  in  this  or  any  previous  filing,  or  that  the  relevant  regulatory  agencies  will  agree  with  our
interpretation of comparability.

In  addition,  with  the  FDA  approval  of  UKONIQ  and  as  we  move  closer  to  commercialization  of  ublituximab,  we  are  scaling-up
production to ensure adequate commercial supply. This is an expensive process and there can be no assurance given that such scale-up will be
successful in providing pharmaceutical product that is of sufficient quantity, or of a quality that is consistent with our previously established
specifications,  or  that  meets  the  requirements  set  by  regulatory  agencies  under  which  we  may  seek  approval  of  our  product  candidates.  If
scale-up were not to succeed, our ability to supply our anticipated market at a reasonable cost of goods would be negatively impacted. In such
an event, that would have a material adverse effect on the Company. Scale up could also require additional process improvement that might
be required to accommodate new and larger equipment utilized in the scaled-up process. If that were to occur and we could not demonstrate
to the FDA that the materials were analytically substantially similar, we might be required to run additional clinical testing to demonstrate
that  they  are  substantially  similar.  That  would  entail  a  significant  delay  and  significant  increase  in  total  cost,  all  of  which  would  have  a
material adverse effect on the Company.

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Risks Related to Governmental Regulation of Pharmaceutical Industry and Legal Compliance Matters

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 both the United States and certain foreign countries, there have been a number of legislative and regulatory changes or proposed
changes to the healthcare system, many of which have focused on prescription drug pricing and lowering overall healthcare costs, that could
impact our ability to sell our products profitably. We expect prescription drug pricing and other healthcare costs to continue to be subject to
intense political and social pressures on a global basis.

In  the  United  States,  the  President,  federal  and  state  legislatures,  health  agencies  and  third-party  payors  continue  to  focus  on
containing the cost of healthcare and addressing public concern over access and affordability of prescription drugs.  The Patient Protection
and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010 (collectively, the ACA) was enacted in
2010 and made significant changes to the U.S. healthcare system. ACA changes included expanding healthcare coverage through Medicaid
expansion  and  implementation  of  the  individual  health  insurance  mandate;  changing  coverage  and  reimbursement  of  drug  products  under
government  healthcare  programs;  imposing  an  annual  fee  on  manufacturers  of  branded  drugs;  and  expanding  government  enforcement
authority.   Although the ACA has been the subject of a number of legislative and litigation challenges since it passed, it is expected that the
Biden Administration will seek to strengthen and expand the ACA.  We cannot product what affect further changes to the ACA (whether
repeal, replacement, or further amendment) would have on our business.

Beyond the ACA, there has been increasing legislative, regulatory and enforcement interest with respect to prescription drug pricing
practices.  With the election of President Biden and changes in make-up of the Senate following the 2020 election, we face uncertainties with
respect to executive and legislative actions relating to drug pricing.  Proposals that may garner bipartisan legislative support include adding a
cap on out-of-pocket spending under Medicare Part D and imposing limits on increases in drug prices.  In addition, President Biden may take
executive action to introduce new drug pricing models and other drug pricing initiatives.  

Federal and state elections in 2020 have changed which persons and parties occupy the Office of the President of the United States
and  control  both  chambers  of  Congress  and  many  states’  governors  and  legislatures.    These  changes  will  likely  result  in  new  priorities,
rulemakings and legislation.  We anticipate that the new Biden Administration will issue a number of Executive Orders, which may alter the
policies of the previous administration.  Additionally, certain agency rules and policy statements of the prior four years may be rescinded.
 Further, the Biden Administration may propose substantial changes to the U.S. healthcare system, including expanding government-funded
health  insurance  options.    We  are  uncertain  of  the  impact  or  outcome  of  these  potential  Executive  Orders,  rescission  of  rules  and  policy
statements, or new legislation, especially any relative impact on the healthcare regulatory and policy landscape, or the impact they may have
on  our  business.  While  drug  pricing  was  a  priority  for  the  prior  administration,  we  expect  that  it  will  continue  to  be  a  focus  of  the  Biden
Administration in 2021 and beyond. At the state level, legislatures have increasingly passed legislation and implemented regulations designed
to control pharmaceutical pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and
marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk
purchasing.  

There continue to be efforts to lower drug prices through increased competition, with policy proposals seeking to facilitate generic
and biosimilar approval and marketing authorization.  For example, in 2018, the FDA announced the Biosimilar Action Plan and sought input
on how the agency can best facilitate greater availability of biosimilar products, including input on whether changes to an approved biologic
(e.g., a new indication) would be protected by the remainder of the statutory 12-year exclusivity period (commonly referred to as “umbrella
exclusivity”).  In the event there is a modification to the biologic exclusivity period or other steps taken to facilitate biosimilar or generic
approvals, we could experience biosimilar/generic competition of any products for which we receive FDA approval at an earlier time than
currently anticipated.

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There  have  been  several  recent  U.S.  Congressional  inquiries  and  proposed  and  enacted  legislation  designed  to  bring  more
transparency to drug pricing, reduce the cost of prescription drugs under Medicare, limit price increases, evaluate the relationship between
pricing and manufacturer patient programs, and reform government health care program reimbursement methodologies for prescription drugs.
  For  example,  the  Bipartisan  Budget  Act  of  2018  (the  BBA)  increased  manufacturer  point-of-sale  discounts  off  negotiated  prices  of
applicable  brand  drugs  in  the  Medicare  Part  D  coverage  gap  from  50%  to  70%  effective  as  of  January  1,  2019,  ultimately  increasing  the
liability for brand drug manufacturers.   We expect that health care 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  may  receive  for  any  of  our  product  candidates,  if
approved.  Any  reduction  in  reimbursement  from  Medicare  or  other  government  health  care  programs  may  result  in  a  similar  reduction  in
payments from private payors.

At  the  state  level,  individual  states  are  experiencing  significant  economic  pressure  within  their  state  Medicaid  programs  and
responding to public concern over the cost of healthcare.  The economic impact of the COVID-19 pandemic has further exacerbated state
budgetary pressures.  States, including California, Florida, Nevada and Maine, among others, have responded to these pressures with a range
of  legislative  enactments  and  policy  proposals  designed  to  control  prescription  drug  prices  by,  for  example,  allowing  importation  of
pharmaceutical  products  from  jurisdictions  outside  the  U.S.,  imposing  price  controls  on  state  drug  purchases,  consolidating  state  drug
purchasing to a single purchaser, and imposing transparency measures around prescription drug prices and marketing costs.  These measures,
which vary by state, could reduce the ultimate demand for our products, if approved, or put pressure on our product pricing.

In addition, other legislative changes have been adopted that could have an adverse effect upon, and could prevent, our products’ or
product candidates’ commercial success. More broadly, the Budget Control Act of 2011, as amended, or the Budget Control Act, includes
provisions intended to reduce the federal deficit, including reductions in Medicare payments to providers through 2030 (except May 1, 2020
to  December  31,  2020).  Any  significant  spending  reductions  affecting  Medicare,  Medicaid  or  other  publicly  funded  or  subsidized  health
programs,  or  any  significant  taxes  or  fees  imposed  as  part  of  any  broader  deficit  reduction  effort  or  legislative  replacement  to  the  Budget
Control Act, or otherwise, could have an adverse impact on our anticipated product revenues.

Furthermore,  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 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.

In  many  international  markets,  including  the  European  Union,  the  government  regulates  prescription  drug  prices,  patient  access,
and/or reimbursement levels to control the biopharmaceutical budget of their government-sponsored healthcare system.  The European Union
and some individual countries have announced or implemented measures and may in the future implement new or additional measures, to
reduce biopharmaceutical costs to contain the overall level of healthcare expenditures.  These measures vary by country and may include,
among other things, non-coverage decisions, patient access restrictions, international price referencing, mandatory discounts or rebates, and
cross-border sales of prescription drugs.  These measures may adversely affect our ability to generate revenues or commercialize our product
candidates in certain international markets.

There likely will continue to be pressure on prescription drug prices globally and legislative and regulatory proposals, including at
the federal and state levels in the U.S., directed at broadening the availability of health care and containing or lowering the cost of health care
products and services. We cannot predict the initiatives that may be adopted in the future. The continuing efforts of the government, health
insurance  companies,  managed  care  organizations  and  other  payors  of  health  care  services  to  contain  or  reduce  costs  of  health  care  may
adversely affect, among other things:

● our ability to generate revenues and achieve or maintain profitability;
● the demand for any products for which we may obtain regulatory approval;
● our ability to set a price that we believe is fair for our products;
● the level of taxes that we are required to pay; and
● the availability of capital.

In addition, governments may impose price controls, which may adversely affect our future profitability.

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  Our  relationships  with  customers  and  third-party  payors  will  be  subject  to  applicable  fraud  and  abuse  laws,  false  claims  laws,
transparency and disclosure laws, health information and security laws, and other healthcare laws and regulations, which could expose
us to criminal sanctions, civil penalties, exclusion from government healthcare programs, contractual damages, reputational harm and
diminished profits and future earnings.

With  the  FDA  approval  of  UKONIQ  in  February  2021,  we  became  subject  to  additional  extensive  healthcare  statutory  and
regulatory requirements and oversight by the federal government and the states and foreign governments in which we conduct our business.
Healthcare providers and third-party payors play a primary role in the recommendation and prescription of any drug candidates for which we
obtain marketing approval. Our past, current and future relationships, arrangements and interactions with these professionals and entities, as
well as with patients and patient advocacy organizations will expose us to broadly applicable fraud and abuse and other healthcare laws and
regulations that may constrain the business or financial arrangements and relationships through which we market, sell and distribute our drug
candidates for which we obtain marketing approval. Restrictions under applicable federal and state healthcare laws and regulations include
the following:

● the  federal  Anti-Kickback  Statute  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  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.  A  person  or  entity  does  not  need  to  have  actual
knowledge of the statute or specific intent to violate it in order to have committed a violation;

● the  federal  False  Claims  Act  imposes  civil  penalties,  including  through  civil  whistleblower  or  qui  tam  actions,  against
individuals  or  entities  for,  among  other  things,  knowingly  presenting,  or  causing  to  be  presented,  to  the  federal  government,
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. In addition, the government may assert that a claim including items and services resulting
from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the False Claims
Act;

● the  federal  Health  Insurance  Portability  and  Accountability  Act  of  1996  (or  HIPAA)  imposes  criminal  and  civil  liability  for
executing a scheme to defraud any healthcare benefit program, or knowingly and willfully falsifying, concealing or covering up
a material fact or making any materially false statement in connection with the delivery of or payment for healthcare benefits,
items or services; similar to the federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the
statute or specific intent to violate it in order to have committed a violation;

● the  so-called  federal  “Sunshine  Act”  under  the  Affordable  Care  Act  requires  manufacturers  of  drugs,  devices,  biologics  and
medical supplies that are reimbursable under Medicare, Medicaid, or the Children’s Health Insurance Program to monitor and
report information related to payments and other transfers of value to and the ownership and investment interests of physicians
and  teaching  hospitals  (and  additional  categories  of  healthcare  providers  beginning  with  reports  submitted  in  2022)  to  the
federal government for redisclosure to the public;

● HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 and its implementing
regulations,  which  also  imposes  obligations  on  certain  covered  entity  healthcare  providers,  health  plans,  and  healthcare
clearinghouses as well as their business associates that perform certain services involving the use or disclosure of individually
identifiable health information, including mandatory contractual terms, with respect to safeguarding the privacy, security and
transmission of individually identifiable health information;

● a  wide  range  of  federal  and  state  consumer  protection  and  unfair  competition  laws,  which  broadly  regulate  marketplace

activities and activities that potentially harm consumers including those related to privacy;

● the Federal Food, Drug, and Cosmetic Act and its implementing regulations, which among other things, strictly regulate drug
product  marketing  and  prohibit  manufacturers  from  promotion  and  marketing  of  products  prior  to  approval  or  for  uses
inconsistent with the FDA-required labeling;

● federal  laws,  including  the  Medicaid  Drug  Rebate  Program,  that  require  pharmaceutical  manufacturers  to  report  certain
calculated product prices to the government or provide certain discounts or rebates to government authorities or private entities,
often as a condition of reimbursement under government healthcare programs;

● the Drug Supply Chain Security Act, or DSCSA, which imposes obligations on entities in the commercial product supply chain,

including manufacturers, to identify and track prescription drugs as they are distributed in the U.S.; and

● state law equivalents of some of the above federal laws, such as anti-kickback and false claims laws that may apply to items or
services  reimbursed  by  any  third-party  payor,  including  commercial  insurers,  state  transparency  laws,  state  laws  limiting
interactions between pharmaceutical manufacturers and members of the healthcare industry, and state laws governing the

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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 federal laws, thus complicating compliance efforts.

In the U.S., to help patients who have no or inadequate insurance access to UKONIQ, we have a patient support program that we
administer in conjunction with a patient support program vendor and other third parties.  There has been heightened governmental scrutiny
recently over the scope of patient support programs and the manner in which drug manufacturers and their vendors operate such programs.
 We cannot ensure that our compliance controls, policies, and procedures will be sufficient to protect against acts of our employees, business
partners  or  vendors  that  may  violate  the  laws,  regulations,  or  evolving  government  guidance  on  patient  support  programs.  A  government
investigation, regardless of its outcome, could impact our business practices, harm our reputation, divert attention of management, increase
our  expenses  and  reduce  availability  of  assistance  to  patients.    If  we  or  our  vendors  are  deemed  to  fail  to  comply  with  relevant  laws,
regulations or government guidance in the operation of these programs, we could be subject to damages, fines, penalties or other criminal,
civil or administrative sanctions or enforcement actions.  

Ensuring  that  our  future  business  arrangements  with  third  parties  comply  with  applicable  healthcare  laws  and  regulations  will
involve substantial costs. It is possible that governmental authorities will conclude that our business practices do not comply with current or
future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations.  The compliance and
enforcement landscape, and related risk, is informed by government enforcement precedent and settlement history, Advisory Opinions, and
Special Fraud Alerts.  Our approach to compliance may evolve over time in light of these types of developments.  Additionally, the potential
safe  harbors  available  under  the  AKS  are  subject  to  change  through  legislative  and  regulatory  action,  and  we  may  decide  to  adjust  our
business practices or be subject to heightened scrutiny as a result.  If our operations, including anticipated activities to be conducted by our
sales team, were to be 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,  damages,  fines,  exclusion  from  government-funded  healthcare  programs,
such as Medicare and Medicaid, qui tam actions brought by individual whistleblowers in the name of the government, and the curtailment or
restructuring of our operations.

If we violate applicable data privacy and security laws, we may be subject to penalties, including civil and criminal penalties, damages,
fines and the curtailment or restructuring of our operations.

We  may  be  subject  to  privacy  and  security  laws  in  the  various  jurisdictions  in  which  we  operate,  obtain  or  store  personally
identifiable information. The legislative and regulatory landscape for privacy and data protection continues to evolve, and there has been an
increasing focus on privacy and data protection issues with the potential to affect our business.

Within the United States, various federal and state laws regulate the privacy and security of personal information and so may affect
our  business  operations.    For  example,  at  the  federal  level,  our  operations  may  be  affected  by  the  data  privacy  and  security  provisions  of
HIPAA,  as  amended  by  the  Health  Information  Technology  for  Economic  and  Clinical  Health  Act  and  its  implementing  regulations.
Although we are not currently directly subject to HIPAA, HIPAA affects the ability of healthcare providers and other entities with which we
may interact, including clinical trial sites, to disclose patient health information to us.  Under Section 5(a) of the Federal Trade Commission
Act,  or  the  FTCA,  the  FTC  expects  a  company’s  data  security  measures  to  be  reasonable  and  appropriate  in  light  of  the  sensitivity  and
volume  of  consumer  information  it  holds,  the  size  and  complexity  of  its  business,  and  the  cost  of  available  tools  to  improve  security  and
reduce  vulnerabilities.  Medical  data  is  considered  sensitive  data  that  merits  stronger  safeguards.  States  may  also  impose  requirements,  for
example the California Consumer Privacy Act, or the CCPA, went into effect in January 2020 creating data privacy obligations for covered
companies and providing privacy rights to California residents, including the right to opt out of certain disclosures of their information.

Numerous  other  jurisdictions  regulate  the  privacy  and  security  of  personally  identifiable  data.  For  example,  the  processing  of
personal data in the European Economic Area, or the EEA, is subject to the General Data Protection Regulation, or the GDPR, which took
effect in May 2018. The GDPR increases obligations with respect to clinical trials conducted in the EEA, such as in relation to the provision
of fair processing notices, exercising data subject rights and reporting certain data breaches to regulators and affected individuals, as well as
how we document our relationships with third parties that process GDPR-covered personal data on our behalf. The GDPR also increases the
scrutiny applied to transfers of personal data from the EEA (including from clinical trial sites in the EEA) to countries that are considered by
the European Commission to lack an adequate level of data protection, such as the United States. In July 2020, the Court of Justice of the
European Union invalidated the EU-U.S. Privacy Shield framework, one of the mechanisms used to legitimize the transfer of personal data
from the EEA to the U.S., which decision may lead to increased scrutiny on data transfers from the EEA to the U.S. generally and increase
our costs of compliance with data privacy legislation.  

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If our operations are found to be in violation of any data privacy and security laws, rules or regulations that apply to us, we may be
subject to penalties, including civil and criminal penalties, damages, fines and the curtailment or restructuring of our operations, which could
adversely  affect  our  ability  to  operate  our  business  and  our  financial  results.  Although  compliance  programs  can  mitigate  the  risk  of
investigation and prosecution for violations of these laws, rules or regulations, we cannot be certain that our program will address all areas of
potential  exposure  and  the  risks  in  this  area  cannot  be  entirely  eliminated,  particularly  because  the  requirements  and  government
interpretations  of  the  requirements  in  this  space  are  constantly  evolving.  Any  action  against  us  for  violation  of  these  laws,  rules  or
regulations,  even  if  we  successfully  defend  against  it,  could  cause  us  to  incur  significant  legal  expenses  and  divert  our  management’s
attention from the operation of our business, as well as damage our business or reputation. Moreover, achieving and sustaining compliance
with applicable federal and state privacy, security, fraud and reporting laws may prove costly.

If  we  fail  to  adequately  understand  and  comply  with  the  local  laws  and  customs  as  we  expand  into  new  international  markets,  these
operations may incur losses or otherwise adversely affect our business and results of operations.

We expect to operate a portion of our business in certain countries through subsidiaries or through supply, marketing, and distributor
arrangements. In those countries where we have limited experience in operating subsidiaries and in reviewing equity investees, we will be
subject to additional risks related to complying with a wide variety of national and local laws, including restrictions on the import and export
of certain intermediates, drugs, technologies and multiple and possibly overlapping tax laws. In addition, we may face competition in certain
countries from companies that may have more experience with operations in such countries or with international operations generally. We
may also face difficulties integrating new facilities in different countries into our existing operations, as well as integrating employees hired
in  different  countries  into  our  existing  corporate  culture.  If  we  do  not  effectively  manage  our  operations  in  these  subsidiaries  and  review
equity  investees  effectively,  or  if  we  fail  to  manage  our  alliances,  we  may  lose  money  in  these  countries  and  it  may  adversely  affect  our
business and results of our operations. In all interactions with foreign regulatory authorities and other government agencies, we are exposed
to liability risks under the Foreign Corrupt Practices Act or similar anti-bribery laws.

Any  product  for  which  we  obtain  marketing  approval  could  be  subject  to  restrictions  or  withdrawal  from  the  market  and  we  may  be
subject to penalties if we fail to comply with regulatory requirements or if we experience unanticipated problems with products.

Any regulatory approvals that we receive for our drug candidates may be subject to limitations on the indicated uses for which the
drug may be marketed or to conditions of approval that may require potentially costly post-marketing clinical trials or surveillance to monitor
safety and efficacy of the drug candidate.  In addition, any product for which we obtain marketing approval, along with the manufacturing
processes  and  facilities,  post-approval  clinical  data,  labeling,  advertising  and  promotional  activities  for  such  product,  will  be  subject  to
continual requirements of, and review by, the FDA and comparable regulatory authorities. These requirements include submissions of safety
and  other  post-marketing  information  and  reports,  registration  requirements,  current  Good  Manufacturing  Practice  (cGMP)  requirements
relating  to  quality  control,  quality  assurance  and  corresponding  maintenance  of  records  and  documents,  and  requirements  regarding
promotional interactions with healthcare professionals.

Failure  to  comply  with  these  regulatory  requirements  or  later  discovery  of  previously  unknown  problems  with  products,

manufacturers, or manufacturing processes, may result in actions such as:

● restrictions on product manufacturing, distribution or use;
● restrictions on the labeling or marketing of a product;
● requirements to conduct post-marketing studies or clinical trials;
● warning letters;
● withdrawal of the products from the market;
● refusal to approve pending applications or supplements to approved applications that we or our subsidiaries submit;
● recalls;
● suspension or termination of ongoing clinical trials;
● fines, restitutions, or disgorgement of profits or revenues;
● refusal to permit the import or export of products;
● product seizure or detentions;
● injunctions or the imposition of civil or criminal penalties; and
● adverse publicity.

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Any government investigation of alleged violations of law could require us to expend significant time and resources in response and
could  generate  negative  publicity.    In  addition,  the  FDA’s  regulations,  policies  or  guidance  may  change  and  new  or  additional  statutes  or
government  regulations  may  be  enacted  that  could  prevent  or  delay  regulatory  approval  of  our  product  candidates  or  further  restrict  or
regulate post-approval activities.  We also cannot predict the likelihood, nature, or extent of adverse government regulation that may arise
from pending or future legislation or administrative action, either in the United States or abroad.

If we, or our respective suppliers, third-party contractors, clinical investigators or collaborators are slow to adapt, or are unable to
adapt,  to  changes  in  existing  regulatory  requirements  or  adoption  of  new  regulatory  requirements  or  policies,  we,  our  subsidiaries,  or  our
respective collaborators may be subject to the actions listed above, including losing marketing approval for products, resulting in decreased
revenue from milestones, product sales or royalties.

Our third-party manufacturers may use hazardous materials in the production of UKONIQ and our product candidates and if so, they
must comply with environmental laws and regulations, which can be expensive and restrict how we or they do business.

Manufacturing activities for the production of UKONIQ and our product candidates involve the controlled storage, use, and disposal
of hazardous materials, including the components of our product candidates, and other hazardous compounds. Our third-party manufacturers
and we are subject to federal, state, and local laws and regulations governing the use, manufacture, storage, handling, release, disposal of, and
exposure  to,  these  hazardous  materials.  Violation  of  these  laws  and  regulations  could  lead  to  substantial  fines  and  penalties.  Although  we
believe that our safety procedures, and those of our third-party manufacturers, 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 an accident, state or federal authorities may curtail our use of these materials and interrupt our business operations. In addition,
we could become subject to potentially material liabilities relating to the investigation and cleanup of any contamination, whether currently
unknown or caused by future releases.

Risks Related to Our Dependence on Third Parties

We rely on third parties to generate clinical, preclinical and other data necessary to support the regulatory applications needed to conduct
clinical trials and file for marketing approval. We rely on third parties to help conduct our planned clinical trials. If these third parties do
not  perform  their  services  as  required,  we  may  not  be  able  to  obtain  regulatory  approval  for  or  commercialize  our  product  candidates
when expected or at all.

In order to submit an Investigational New Drug application (IND), BLA, or NDA to the FDA and maintain these applications, it is
necessary  to  submit  all  information  on  the  clinical,  non-clinical,  chemistry,  manufacturing,  controls  and  quality  aspects  of  the  product
candidate.  Clinical  trial  applications  and  marketing  authorization  applications  for  foreign  regulatory  bodies  have  substantially  similar
requirements.  We rely on our third-party contractors and our licensing partners to provide portions of this data. If we are unable to obtain this
data, or the data is not sufficient to meet the regulatory requirements, we may experience significant delays in our development programs.

Additionally, we use CROs to assist in the conduct of our current clinical trials and expect to use such services for future clinical
trials  and  we  rely  upon  medical  institutions,  clinical  investigators  and  contract  laboratories  to  conduct  our  trials  in  accordance  with  our
clinical protocols and appropriate regulations. Our current and future CROs, investigators and other third parties play a significant role in the
conduct  of  our  trials  and  the  subsequent  collection  and  analysis  of  data  from  the  clinical  trials.  There  is  no  guarantee  that  any  CROs,
investigators and other third parties will devote adequate time and resources to our clinical trials or perform as contractually required. If any
third  parties  upon  whom  we  rely  for  administration  and  conduct  of  our  clinical  trials  fail  to  meet  expected  deadlines,  fail  to  adhere  to  its
clinical protocols or otherwise perform in a substandard manner, our clinical trials may be extended, delayed or terminated, and we may not
be able to commercialize our product candidates. In addition to the third parties identified above, we are also heavily reliant on the conduct of
our patients enrolled to our studies by our third-party investigators. We rely on our clinical trial sites and investigators to properly identify
and  screen  eligible  candidates  for  our  clinical  trials,  and  for  them  to  ensure  participants  adhere  to  our  clinical  protocol  requirements.  The
majority of our clinical trial conduct occurs in the outpatient setting, where patients are expected to continue to adhere to our study protocol
specified requirements. The ability of our enrolled patients to properly identify, document, and report adverse events; take protocol specified
study  drugs  at  the  correct  quantity,  time,  and  setting,  as  applicable;  avoid  contraindicated  medications;  and  comply  with  other  protocol
specified  procedures  such  as  returning  to  the  trial  site  for  scheduled  laboratory  and  disease  assessments,  is  wholly  out  of  our  control.
Deviations  from  protocol  procedures,  such  as  those  identified  previously,  could  materially  affect  the  quality  of  our  clinical  trial  data,  and
therefore ultimately affect our ability to develop and commercialize our drug candidates. If any of our clinical trial sites terminates for any
reason, we may experience the loss of follow-up information on patients enrolled in our ongoing clinical trials unless we are able to transfer

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the care of those patients to another qualified clinical trial site. If any of our clinical trial sites are required by the FDA or IRB to close down
due to data management or patient management or any other issues, we may lose patients. In our MS Phase 2 trial, during routine monitoring
and site audits, significant Good Clinical Practice (GCP) violations and other noncompliance issues were identified at one of our US-based
large academic sites. The investigator left the institution and shortly thereafter the site terminated their participation in our study before all
data  could  be  source  document  verified.  While  we  do  not  believe  this  will  have  any  effect  on  the  overall  results  of  the  MS  Phase  2  trial,
sensitivity analyses excluding data from this site will be performed and no assurance can be given that the results were not affected.

Whether conducted through a CRO or through our internal staff, we are solely responsible for ensuring that each of our clinical trials
is conducted in accordance with the applicable protocol, legal and regulatory requirements and scientific standards, and our reliance on CROs
will not relieve us of our regulatory responsibilities. For any violations of laws and regulations during the conduct of our clinical trials, we
could be subject to warning letters or other enforcement actions that may include civil penalties up to and including criminal prosecution. We
and our CROs are required to comply with regulations, including GCP guidelines for conducting, monitoring, recording and reporting the
results of clinical trials to ensure that the data and results are scientifically credible and accurate, and that the trial patients are adequately
informed of the potential risks of participating in clinical trials and their rights are protected. These regulations are enforced by the FDA, the
Competent  Authorities  of  the  Member  States  of  the  European  Economic  Area  and  comparable  foreign  regulatory  authorities  for  any  drug
candidates  in  clinical  development.  The  FDA  enforces  GCP  regulations  through  periodic  inspections  of  clinical  trial  sponsors,  clinical
investigators, CROs, institutional review boards, and non-clinical laboratories. If we, our CROs, our investigators or other third parties 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, the FDA will determine that our current or future clinical trials comply with GCPs. In addition, our clinical trials must
be conducted with drug candidates produced under cGMP regulations. Our failure or the failure of our CROs or CMOs to comply with these
regulations  may  require  us  to  repeat  clinical  trials,  which  would  delay  the  regulatory  approval  process  and  could  also  subject  us  to
enforcement  action.  We  also  are  required  to  register  most  ongoing  clinical  trials  and  post  the  results  of  completed  clinical  trials  on
government-sponsored databases, e.g., ClinicalTrials.gov, within certain timeframes. Failure to do so can result in fines, adverse publicity and
civil and criminal sanctions.

Although we intend to design the clinical trials for our drug candidates, CROs play an important role in the conduct of our clinical
trials, especially outside of the United States. As a result, many important aspects of our development programs, including their conduct and
timing, will be outside of our direct control. Our reliance on third parties to conduct current or future clinical trials will also result in less
direct control over the management of data developed through clinical trials than would be the case if we were relying entirely upon our own
staff.  Communicating  with  outside  parties  can  also  be  challenging,  potentially  leading  to  mistakes  as  well  as  difficulties  in  coordinating
activities. Outside parties may:

● have staffing difficulties;
● fail to comply with contractual obligations;
● experience regulatory compliance issues;
● undergo changes in priorities or become financially distressed; or
● form relationships with other entities, some of which may be our competitors.

These factors may materially adversely affect the willingness or ability of third parties to conduct our clinical trials and may subject
us to unexpected cost increases that are beyond our control. If the CROs do not perform clinical trials in a satisfactory manner, breach their
obligations to us or fail to comply with regulatory requirements, the development, regulatory approval and commercialization of our drug
candidates may be delayed, we may not be able to obtain regulatory approval and commercialize our drug candidates, or our development
program may be materially and irreversibly harmed. If we are unable to rely on clinical data collected by our CROs, we could be required to
repeat, extend the duration of, or increase the size of any clinical trials we conduct and this could significantly delay commercialization and
require significantly greater expenditures.

If any of our relationships with these third-party CROs terminate, we may not be able to enter into arrangements with alternative
CROs. If CROs do not successfully carry out their contractual duties or obligations or meet expected deadlines, if they need to be replaced or
if  the  quality  or  accuracy  of  the  clinical  data  they  obtain  is  compromised  due  to  the  failure  to  adhere  to  our  clinical  protocols,  regulatory
requirements or for other reasons, any clinical trials such CROs are associated with may be extended, delayed or terminated, and we may not
be  able  to  obtain  regulatory  approval  for  or  successfully  commercialize  our  product  candidates.  As  a  result,  we  believe  that  our  financial
results and the commercial prospects for our product candidates in the subject indication would be harmed, our costs could increase and our
ability to generate revenue could be delayed.

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 We contract with third parties for the manufacture of UKONIQ for commercial supply and of our product candidates for pre-clinical
development and clinical trials, and we expect to continue to do so. This reliance on third parties increases the risk that we will not have
sufficient quantities of our products or product candidates or such quantities at an acceptable cost or quality, which could delay, prevent
or impair our development or commercialization efforts.

We do not currently own or operate, nor do we have any plans to establish in the future, any manufacturing facilities. We rely, and
expect  to  continue  to  rely,  on  third  parties  for  the  manufacture,  packaging  and  labeling  of  any  products  that  we  commercialize,  including
UKONIQ, and our product candidates for pre-clinical development and clinical testing.  In some circumstances, our licensor has entered into
arrangements with contract manufacturers to supply product for our clinical and commercial demand. Our reliance on third parties increases
the risk that we will not have sufficient quantities of our products or product candidates or such quantities at an acceptable cost or quality,
which could delay, prevent or impair our development or commercialization efforts.

The  facilities  used  by  contract  manufacturers  to  manufacture  our  drug  candidates  typically  undergo  inspections  by  the  FDA  or  a
comparable foreign regulatory to verify compliance with applicable cGMP regulations.  Such inspections may be conducted after we submit
our marketing applications to or receive marketing approval from the FDA or a comparable foreign regulatory authority. Although FDA and
other regulators impose requirements regarding our selection, qualification, oversight, and monitoring of our contract manufacturers and hold
us responsible for the ultimate compliance of our products, we do not directly control the manufacturing process of our third-party contract
manufacturers and are subject to risks associated with their ability to comply with cGMPs in connection with the manufacture of our products
and product candidates. If our contract manufacturers cannot successfully manufacture material that conforms to our specifications and the
strict regulatory requirements of the FDA or others and the compliance concerns cannot be resolved, remediated, or otherwise addressed to
FDA’s  satisfaction  in  a  timely  manner  during  the  review  of  our  NDAs  or  BLAs,  it  may  negatively  impact  our  ability  to  obtain  regulatory
approval  for  our  drug  candidates  or  obtain  approval  within  projected  timelines.  We  cannot  guarantee  the  ability  of  our  third-party
manufacturers  to  maintain  compliance  with  cGMP  regulations,  including  having  adequate  quality  control,  quality  assurance  and  qualified
personnel. Further, 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,  civil  penalties,  delays,  suspension  or  withdrawal  of  approvals,  license
revocation,  seizures  or  recalls  of  products  or  product  candidates,  operating  restrictions  and  criminal  prosecutions,  any  of  which  could
significantly and adversely affect our business and supplies of our products or product candidates.

For certain of our product candidates, we do not have long-term supply agreements with contract manufacturers. For these product
candidates,  we  purchase  our  required  drug  supply,  including  the  drug  product  and  drug  substance  on  a  purchase  order  basis.  We  may  be
unable to establish or maintain agreements with third-party manufacturers for these products or product candidates or do so on acceptable
terms.  No  assurance  can  be  given  that  long-term,  scalable  manufacturers  can  be  identified  or  that  they  can  make  clinical  and  commercial
supplies of our product candidates that meet the product specifications of previously manufactured batches, or are of a sufficient quality, or at
an appropriate scale and cost to make it commercially feasible. If they are unable to do so, it could have a material adverse impact on our
business.

Even  if  we  are  able  to  establish  and  maintain  agreements  with  third-party  manufacturers,  reliance  on  third-party  manufacturers

entails additional risks, including:

● reliance on the third party for regulatory compliance and quality assurance;
● the possible breach of the manufacturing or supply agreement by the third party;
● 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.

Moreover, our current long-term supply agreement contains certain minimum purchases in what are commonly referred to as a “take
or pay” provision, and it is possible that future supply agreements could contain such provisions. To the extent our demand does not meet the
minimum supply required amounts, we would be forced to pay more than desired. This could create a situation where we are spending more
than required and could impact our on-going operations and entail curtailing other important research and development or commercialization
efforts, all of which could have a material adverse effect on the Company.

Our drug candidates and any drugs that we may develop may compete with other drug candidates and approved drugs 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.

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Any performance failure on the part of our existing or future manufacturers could delay clinical development or marketing approval,
or  interrupt  commercial  distribution.  If  our  current  contract  manufacturers  cannot  perform  as  agreed,  we  may  be  required  to  replace  such
manufacturers causing additional costs and delays in identifying and qualifying any such replacement.

Our current and anticipated future dependence upon others for the manufacture of our products or product candidates could result in
significant delays or gaps in availability of such products or product candidates and may adversely affect our future profit margins and our
ability to commercialize any drugs that receive marketing approval on a timely and competitive basis.

We  also  rely  on  other  third  parties  to  store  and  distribute  drug  supplies  for  our  clinical  trials  and  for  commercial  demand  for
UKONIQ and expect to continue to do so for any other product candidates that may receive approval. Any performance failure on the part of
our  distributors  could  delay  clinical  development  or  marketing  approval  of  any  future  product  candidates  or  commercialization  of  our
products, producing additional losses and depriving us of potential product revenue.

The  third  parties  upon  whom  we  rely  for  the  supply  of  starting  materials,  intermediates,  active  pharmaceutical  ingredient  (API)/drug
substance, drug product, and other materials used in our drug candidates are our sole source of supply, and the loss or disruption of any
of these suppliers, including as a result of the COVID-19 pandemic, could significantly harm our business.

The  starting  materials,  intermediates,  API/drug  substance,  and  drug  product  used  in  many  of  our  drug  candidates  are  currently
supplied to us from single-source suppliers. Our ability to successfully develop our drug candidates, supply our drug candidates for clinical
trials  and  to  ultimately  supply  our  commercial  drugs  in  quantities  sufficient  to  meet  the  market  demand,  depends  in  part  on  our  ability  to
obtain starting materials, intermediates, API/drug substance, and drug product for these drugs in accordance with regulatory requirements and
in sufficient quantities for clinical testing and commercialization. It is expected that many of our manufacturing partners will be sole source
suppliers  from  single  site  locations  for  the  foreseeable  future.  Various  raw  materials,  components,  and  testing  services  required  for  our
products may also be single sourced.  We are not certain that our single-source suppliers will be able to supply sufficient quantities of their
products or on the timelines necessary to meet our needs, either because of the nature of our agreements with those suppliers, our limited
experience with those suppliers, our relative importance as a customer to those suppliers, public health emergencies such as the COVID-19
pandemic or natural disasters that may cause those suppliers to stop work for a period of time.  If any of our suppliers ceases its operations for
any reason or is unable or unwilling to supply starting materials, intermediates, API/drug substance, and drug product in sufficient quantities
or on the timelines necessary to meet our needs, it could significantly and adversely affect our business, the supply of our drug candidates and
our  financial  condition.    In  addition,  if  our  current  or  future  supply  of  any  of  our  products  or  product  candidates  should  fail  to  meet
specifications during its stability program there could be a voluntary or mandatory product recall if the product is approved and, even in the
absence of a recall, there could be significant interruption of our supply of drug, which would adversely affect the clinical development and
commercialization of the product.  

Although COVID-19 has not had a material adverse effect on our supply chain to date, no assurance can be given that it will not in
the future if the situation persists or worsens. UKONIQ is manufactured in India, ublituximab is manufactured in South Korea, and TG-1701
is  manufactured  in  China.    Each  of  these  countries  continues  to  be,  or  has  been,  subject  to  government-imposed  quarantines  and  travel
restrictions  due  to  the  COVID-19  pandemic,  which,  in  some  cases,  have  resulted  in  reduced  operations  at  manufacturing  and  research
locations and time-limited shutdowns.  Our contract manufacturers for UKONIQ and ublituximab are continuing operations at varying levels
of capacity. We have worked closely with our contract manufacturer for UKONIQ to plan for anticipated commercial supply needs.  We also
are working closely with our contract manufacturer for ublituximab to plan for our anticipated commercial supply needs if we are successful
in our continued clinical and regulatory development.  We will continue to monitor the situation very closely with our suppliers in impacted
regions.  

We continually evaluate our supply chains to identify potential risks and needs for additional manufacturers and other suppliers for
the production of our products and product candidates. Establishing additional or replacement suppliers for the API/drug substance and drug
product, if required, may not be accomplished quickly or at all and may involve significant expense. If we are able to find a replacement
supplier,  we  would  need  to  evaluate  and  qualify  such  replacement  supplier  and  its  ability  to  meet  quality  and  compliance  standards.  Any
change in suppliers or the manufacturing process could require additional regulatory approval and result in operational delays. While we seek
to maintain adequate inventory of materials necessary for the production of our products and product candidates, any supply interruption or
delay,  or  our  inability  to  identify  alternate  sources  at  acceptable  prices  in  a  timely  manner  could  impede,  delay,  limit  or  prevent  our
commercialization and development efforts, which could harm our business, results of operations, financial condition and prospects.

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Because  we  have  in-licensed  UKONIQ  and  our  product  candidates  from  third  parties,  any  dispute  with  or  non-performance  by  our
licensors will adversely affect our ability to develop and commercialize the applicable product or product candidate.

Because  we  license  UKONIQ  and  our  product  candidates  from  third  parties  and  we  expect  to  continue  to  in-license  additional
product candidates, if there is any dispute between us and our licensor regarding our rights under a license agreement, our ability to develop
and  commercialize  the  applicable  product  or  product  candidate  may  be  adversely  affected.  Disputes  may  arise  with  the  third  parties  from
whom we license our products and product candidates for a variety of reasons, including:

● the scope of rights granted under the license agreement and other interpretation-related issues;
● the  extent  to  which  our  technology  and  processes  infringe  on  intellectual  property  of  the  licensor  that  is  not  subject  to  the

license agreement;

● the sublicensing of patent and other rights under our collaborative development relationships and obligations associated with

sublicensing;

● our diligence obligations under the license agreement and what activities satisfy those diligence obligations;
● the ownership of inventions and know-how resulting from the joint creation or use of intellectual property by our licensors and

us and our partners; and

● the priority of invention of patented technology.

In addition, the agreements under which we currently license umbralisib and our product candidates 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 our 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 agreement,
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  or  product  candidate,
which could have a material adverse effect on our business, financial conditions, results of operations, and prospects.

If conflicts arise between us and our future collaborators or strategic partners, these parties may act in a manner adverse to us and could
limit our ability to implement our strategies.

If conflicts arise between our future corporate or academic collaborators or strategic partners and us, the other party may act in a
manner adverse to us and could limit our ability to implement our strategies. Future collaborators or strategic partners, may develop, either
alone  or  with  others,  products  in  related  fields  that  are  competitive  with  the  products  or  potential  products  that  are  the  subject  of  these
collaborations.  Competing  products,  either  developed  by  the  collaborators  or  strategic  partners  or  to  which  the  collaborators  or  strategic
partners have rights, may result in the withdrawal of partner support for any future product candidates. Our current or future collaborators or
strategic  partners  may  preclude  us  from  entering  into  collaborations  with  their  competitors,  fail  to  obtain  timely  regulatory  approvals,
terminate their agreements with us prematurely, or fail to devote sufficient resources to the development and commercialization of products.
Any of these developments could harm any future product development efforts.

We may seek to establish additional collaborations, and, if we are not able to establish them on commercially reasonable terms, we may
have to alter our development and commercialization plans.

Our drug development programs and the potential commercialization of our drug candidates will require substantial additional cash
to  fund  expenses.  For  some  of  our  drug  candidates,  we  may  decide  to  collaborate  with  additional  pharmaceutical  and  biotechnology
companies for the development and potential commercialization of those drug candidates.

We face significant competition in seeking appropriate collaborators. Whether we reach a definitive agreement for a collaboration
will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed
collaboration,  and  the  proposed  collaborator’s  evaluation  of  a  number  of  factors.  Those  factors  may  include  the  design  or  results  of  our
clinical trials, the likelihood of approval by the FDA or similar regulatory authorities outside the United States, the potential market for the
subject  product  candidate,  the  costs  and  complexities  of  manufacturing  and  delivering  such  product  candidate  to  patients,  the  potential  of
competing drugs, the existence of uncertainty with respect to our ownership of technology, which can exist if there is a challenge to such
ownership without regard to the merits of the challenge, and industry and market conditions generally. The collaborator 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 our product candidate. The terms of any additional collaborations or other arrangements that
we may establish may not be favorable to us.

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We  may  be  restricted  under  our  collaboration  agreements  from  entering  into  future  agreements  on  certain  terms  with  potential
collaborators. Collaborations are complex and time-consuming to negotiate and document. In addition, there have been a significant number
of  recent  business  combinations  among  large  pharmaceutical  companies  that  have  resulted  in  a  reduced  number  of  potential  future
collaborators.

We may not be able to negotiate additional collaborations on a timely basis, on acceptable terms, or at all. If we are unable to do so, we
may  have  to  curtail  the  development  of  the  product  candidate  for  which  we  are  seeking  to  collaborate,  reduce  or  delay  its  development
program  or  one  or  more  of  our  other  development  programs,  delay  its  potential  commercialization  or  reduce  the  scope  of  any  sales  or
marketing activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect
to  increase  our  expenditures  to  fund  development  or  commercialization  activities  on  our  own,  we  may  need  to  obtain  additional  capital,
which may not be available to us on acceptable terms or at all. If we do not have sufficient funds, we may not be able to further develop our
product candidates or bring them to market and generate revenue from their sales.

Any  future  collaborations  that  we  enter  into  may  not  be  successful.  The  success  of  our  collaboration  arrangements  will  depend
heavily on the efforts and activities of our collaborators. Collaborators generally have significant discretion in determining the efforts and
resources  that  they  will  apply  to  these  collaborations.  Disagreements  between  parties  to  a  collaboration  arrangement  regarding  clinical
development  and  commercialization  matters  can  lead  to  delays  in  the  development  process  or  commercializing  the  applicable  product
candidate and, in some cases, termination of the collaboration arrangement. These disagreements can be difficult to resolve if neither of the
parties has final decision-making authority. Collaborations with pharmaceutical or biotechnology companies and other third parties often are
terminated or allowed to expire by the other party. Any termination or expiration of any future collaboration agreement could adversely affect
us financially or harm our business reputation.

Risks Relating to Our Intellectual Property

Our success depends upon our ability to obtain and protect our intellectual property and proprietary technologies and if the scope of our
patent  protection  obtained  is  not  sufficiently  broad,  our  competitors  could  develop  and  commercialize  technology  and  drugs  similar  or
identical to ours, and our ability to successfully commercialize our technology and drugs may be impaired.

Our commercial success in part depends on obtaining and maintaining patent protection and trade secret protection in the United
States and other countries with respect to any product we commercialize, including UKONIQ, our product candidates, their formulations and
uses and the methods we use to manufacture them, as well as successfully defending these patents against third-party challenges. We seek to
protect  our  proprietary  and  intellectual  property  position  by  filing  patent  applications  in  the  United  States  and  abroad  related  to  our  novel
technologies and product candidates, and by maintenance of our trade secrets through proper procedures.  Because we in-license our products
and  product  candidates,  we  also  rely  on  our  licensors  to  protect  the  patent  and  other  intellectual  property  rights  necessary  for
commercialization.  

We  will  only  be  able  to  protect  our  technologies  from  unauthorized  use  by  third  parties  to  the  extent  that  valid  and  enforceable
patents or trade secrets cover them in the market they are being used or developed. The degree of patent protection we require to successfully
commercialize our products and product candidates may be unavailable or severely limited in some cases and may not adequately protect our
rights or permit us to gain or keep any competitive advantage. We cannot provide any assurances that any of our patents have, or that any of
our pending patent applications that mature into issued patents will include, claims with a scope sufficient to protect any of our products. In
addition, the laws of foreign countries may not protect our rights to the same extent as the laws of the United States.

Furthermore, patents have a limited lifespan. In the United States, the natural expiration of a patent is generally twenty years after it
is filed. Various extensions may be available; however, the life of a patent, and the protection it affords, is limited. Given the amount of time
required for the development, testing and regulatory review of new drug candidates, patents protecting such candidates might expire before or
shortly after such candidates are commercialized. As a result, our owned patent portfolio may not provide us with adequate and continuing
patent protection sufficient to exclude others from commercializing drugs similar or identical to our product candidates, including generic
versions of such drugs.

Currently,  the  composition  of  matter  patent  for  ublituximab  and  UKONIQ  are  granted  in  both  the  United  States  and  EU,  among
other countries. A method of use patent covering the combination of ublituximab and UKONIQ has also been granted in the United States,
European Union, Japan, and several other territories. Additionally, several method of use patents for ublituximab and UKONIQ in various
indications and settings have also been applied for but have not yet been issued or have been issued in certain territories but not under all
jurisdictions in which such applications have been filed. There can be no guarantee that any patents for which an application has already been
filed, nor any patents filed in the future, for cosibelimab, TG-1701 and TG-1801 or for our pre-clinical product candidates will be

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granted in any or all jurisdictions in which they were filed, or that all claims initially included in such patent applications will be allowed in
the final patent that is issued. 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 protecting our product candidates by obtaining and defending patents, or what the scope of an issued
patent may ultimately be.

These risks and uncertainties include the following:

● the patent applications that we or our licensors file may not result in any patents being issued;
● patents that may be issued or in-licensed may be challenged, invalidated, modified, revoked or circumvented, or otherwise may

not provide any competitive advantage;

● as of March 16, 2013, the United States converted from a first to invent to a first to file system. If we do not win the filing race,

we will not be entitled to inventive priority;

● our  competitors,  many  of  which  have  substantially  greater  resources  than  we  do,  and  many  of  which  have  made  significant
investments  in  competing  technologies,  may  seek,  or  may  already  have  obtained,  patents  that  will  limit,  interfere  with,  or
eliminate its ability to file new patent applications or make, use, and sell our potential products either in the United States or in
international markets;

● there  may  be  significant  pressure  on  the  United  States  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 less restrictive patent laws than those upheld by United States courts, allowing

foreign competitors the ability to exploit these laws to create, develop, and market competing products.

If  patents  are  not  issued  that  protect  our  products  or  product  candidates,  it  could  have  a  material  adverse  effect  on  our  financial

condition and results of operations.

In  addition,  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.  Further,  with  respect  to  some  of  the  pending  patent
applications covering our drug candidates, prosecution has yet to commence. Patent prosecution is a lengthy process, during which the scope
of the claims initially submitted for examination by the USPTO have been significantly narrowed by the time they issue, if at all. 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. Moreover, in some circumstances, we do not have the right
to control the preparation, filing and prosecution of patent applications, or to maintain the patents, covering technology that we license from
third parties. Therefore, these patents and applications may not be prosecuted and enforced in a manner consistent with the best interests of
our business. If our licensors or we fail to appropriately prosecute and maintain patent protection or trade secret protection for one or more
products or product candidates, our ability to develop and commercialize such drugs may be adversely affected and we may not be able to
prevent  competitors  from  making,  using  and  selling  competing  products.  This  failure  to  properly  protect  the  intellectual  property  rights
relating to these product candidates could impair our ability to compete in the market and adversely affect our ability to generate revenues
and  achieve  profitability,  which  would  have  a  material  adverse  effect  on  our  financial  condition  and  results  of  operations.  Furthermore,
should  we  enter  into  other  collaborations,  including  out-licensing  or  partnerships,  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 United States. The patent situation outside the United States is
even more uncertain. The laws of foreign countries may not protect our rights to the same extent as the laws of the United States, 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 United States law does. 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  United  States  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 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 United States.
Accordingly, we cannot predict the breadth of claims that may be allowed or enforced in our patents or in those licensed from a third-party.

In  addition,  U.S.  patent  laws  may  change,  which  could  prevent  or  limit  us,  our  subsidiaries,  or  our  licensors  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. For example, on September 16, 2011, the Leahy-Smith America Invents
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-to-file system and to the way issued patents are challenged. The formation of the Patent
Trial and Appeal Board now provides a quicker and less expensive process for challenging issued patents.  

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 parties 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  position.  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 technology 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  patents  and  patent
applications  for  our  drug  candidates  is  threatened,  it  could  dissuade  companies  from  collaborating  with  us  to  license,  develop  or
commercialize current or future product candidates.

The issuance of a patent does not foreclose challenges to its inventorship, scope, validity or enforceability. Therefore, our owned and
licensed patents may be challenged in the courts or patent offices in the U.S. and abroad. Such challenges may result in loss of exclusivity or
in patent claims being narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using
or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and products.
Given  the  amount  of  time  required  for  the  development,  testing  and  regulatory  review  of  new  product  candidates,  patents  protecting  such
product  candidates  might  expire  before  or  shortly  after  such  product  candidates  are  commercialized.  As  a  result,  our  owned  and  licensed
patent portfolio may not provide us with enough rights to exclude others from commercializing products similar or identical to ours.

Even if our patent applications issue as patents, and they are unchallenged, our issued patents and our pending patents, if issued, may
not provide us with any meaningful protection or prevent competitors from designing around our patent claims to circumvent our owned or
licensed  patents  by  developing  similar  or  alternative  technologies  or  drugs  in  a  non-infringing  manner.  For  example,  a  third  party  may
develop  a  competitive  drug  that  provides  benefits  similar  to  one  or  more  of  our  products  or  product  candidates  but  that  has  a  different
composition that falls outside the scope of our patent protection. If the patent protection provided by the patents and patent applications we
hold  or  pursue  with  respect  to  our  products  or  product  candidates  is  not  sufficiently  broad  to  impede  such  competition,  our  ability  to
successfully commercialize our products or product candidates could be negatively affected, which would harm our business.

In addition, we may in the future be subject to claims by our former employees or consultants asserting an ownership right in our
patents or patent applications, as a result of the work they performed on our behalf. Although we have entered into agreements with many of
our employees, consultants and advisors and any other third parties who have access to our proprietary know-how, information or technology
to assign or grant similar rights to their inventions to us, we cannot be certain that we have executed such agreements with all parties who
may have contributed to our intellectual property, nor can we be certain that our agreements with such parties will be upheld in the face of a
potential challenge, or that they will not be breached, for which we may not have an adequate remedy. An adverse determination

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in any such submission or proceeding may result in loss of exclusivity or freedom to operate or in patent claims being narrowed, invalidated
or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical
technology  and  drugs,  without  payment  to  us,  or  could  limit  the  duration  of  the  patent  protection  covering  our  technology  and  drug
candidates. Such challenges may also result in our inability to manufacture or commercialize our products and product candidates 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 drug candidates.

Patent protection and other intellectual property protection are crucial to the success of our business and prospects, and there is a

substantial risk that such protections will prove inadequate.

Obtaining  and  maintaining  patent  protection  depends  on  compliance  with  various  procedural,  document  submission,  fee  payment  and
other  requirements  imposed  by  governmental  patent  agencies,  and  our  patent  protection  could  be  reduced  or  eliminated  for  non-
compliance with these requirements.

The USPTO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee
payment and other similar provisions during the patent application process. In addition, periodic maintenance fees on issued patents often
must be paid to the USPTO and foreign patent agencies over the lifetime of the patent. While an unintentional lapse can in many cases be
cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which noncompliance can
result  in  abandonment  or  lapse  of  the  patent  or  patent  application,  resulting  in  partial  or  complete  loss  of  patent  rights  in  the  relevant
jurisdiction.

Non-compliance events that could result in abandonment or lapse of a patent or patent application include, but are not limited to,
failure to respond to official actions within prescribed time limits, non-payment of fees and failure to properly legalize and submit formal
documents.  If  we  fail  to  maintain  the  patents  and  patent  applications  covering  our  drugs  or  procedures,  we  may  not  be  able  to  stop  a
competitor from marketing drugs that are the same as or similar to our products or product candidates, which would have a material adverse
effect on our business.

If we do not obtain patent term extensions under the Hatch-Waxman Amendments and similar foreign legislation extending the terms of
our licensed patents and any future patents we may own, our business may be materially harmed.

Depending  on  the  timing,  duration,  and  specifics  of  any  FDA  regulatory  approval  for  our  drug  candidates,  one  or  more  of  our
licensed U.S. patents or future U.S. patents that we may license or own may be eligible for limited patent term restoration under the Hatch-
Waxman Amendments.  The Hatch-Waxman Amendments permit a patent term extension of up to five years as compensation for patent term
lost during the FDA regulatory review process.  A patent term extension cannot extend the remaining term of a patent beyond 14 years from
the date of product approval by the FDA, and only one patent covering the approved product may be extended.  

The  application  for  a  patent  term  extension  is  subject  to  approval  by  the  USPTO,  in  conjunction  with  the  FDA.   We  may  not  be
granted  an  extension  because  of,  for  example,  failing  to  apply  within  applicable  deadlines,  failing  to  apply  prior  to  expiration  of  relevant
patents or otherwise failing to satisfy applicable requirements.  Moreover, the applicable time period or the scope of the patent protection
afforded could be less than we request.  If we are unable to obtain patent term extension or any term of such extension is less than we request,
the period during which we will have the right to exclusively market our product will be shortened and our competitors may obtain earlier
approval of competing products, and our ability to generate revenues could be materially adversely affected.

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

Filing, prosecuting and defending patents on drug candidates throughout the world would be prohibitively expensive. Competitors
may use our licensed and owned technologies in jurisdictions where we have not licensed or obtained patent protection to develop their own
products and, further, may export otherwise infringing products to territories where we may obtain or license patent protection, but where
patent enforcement is not as strong as that in the United States. These products may compete with our products in jurisdictions where we do
not have any issued or licensed patents and any future patent claims or other intellectual property rights may not be effective or sufficient to
prevent them from so competing.

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Moreover,  our  ability  to  protect  and  enforce  our  intellectual  property  rights  may  be  adversely  affected  by  unforeseen  changes  in
foreign  intellectual  property  laws.  Additionally,  laws  of  some  countries  outside  of  the  United  States  and  Europe  do  not  afford  intellectual
property protection to the same extent as the laws of the United States and Europe. Many companies have encountered significant problems
in protecting and defending intellectual property rights in certain foreign jurisdictions. The legal systems of some countries, including India,
China  and  other  developing  countries,  do  not  favor  the  enforcement  of  patents  and  other  intellectual  property  rights.  This  could  make  it
difficult for us to stop the infringement of our patents or the misappropriation of our other intellectual property rights. For example, many
foreign countries have compulsory licensing laws under which a patent owner must grant licenses to third parties. Consequently, we may not
be able to prevent third parties from practicing our inventions in certain countries outside the United States and Europe.

Proceedings to enforce our future patent rights, if any, in foreign jurisdictions could result in substantial cost and divert our resources
and attention from other aspects of our business.  Moreover, such proceedings could put our patents at risk of being invalidated or interpreted
narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims against us. We may not prevail in
any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be meaningful. Furthermore, while we intend to
protect our intellectual property rights in major markets for our products, we cannot ensure that we will be able to initiate or maintain similar
efforts in all jurisdictions in which we may wish to market our products. Accordingly, our efforts to protect our intellectual property rights in
such countries may be inadequate.

We  may  be  involved  in  lawsuits  to  protect  or  enforce  our  patents  or  the  patents  of  our  licensors,  which  could  be  expensive,  time
consuming and unsuccessful.

Competitors  may  infringe  our  patents  or  the  patents  of  our  licensors.  To  counter  infringement  or  unauthorized  use,  we  may  be
required to file infringement claims, which typically are very expensive, time-consuming and disruptive of day-to-day business operations.
Any claims we assert against accused infringers could provoke these parties to assert counterclaims against us alleging invalidity of our or
certain of our subsidiaries patents or that we infringe their patents; or provoke those parties to petition the USPTO to institute inter parties
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 an
infringement proceeding, a court may decide that a patent of ours or our licensors is not valid or is unenforceable, or may 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. An adverse result in
any  litigation  or  defense  proceedings  could  put  one  or  more  of  our  pending  patents  at  risk  of  being  invalidated,  held  unenforceable,  or
interpreted narrowly.

In patent litigation in the United States, defendant counterclaims challenging the validity, enforceability or scope of asserted patents
are  commonplace.  In  addition,  third  parties  may  initiate  legal  proceedings  against  us  to  assert  such  challenges  to  our  intellectual  property
rights. The outcome of any such proceeding is generally unpredictable. Grounds for a validity challenge could be an alleged failure to meet
any of several statutory requirements, including lack of novelty, obviousness or non-enablement. Patents may be unenforceable if someone
connected with prosecution of the patent withheld relevant information from the USPTO or made a misleading statement during prosecution.
It  is  possible  that  prior  art  of  which  we  and  the  patent  examiner  were  unaware  during  prosecution  exists,  which  could  render  our  patents
invalid. Moreover, it is also possible that prior art may exist that we are aware of but do not believe is relevant to our current or future patents,
but that could nevertheless be determined to render our patents invalid.

Competing  drugs  may  also  be  sold  in  other  countries  in  which  our  patent  coverage  might  not  exist  or  be  as  strong.  If  we  lose  a
foreign patent lawsuit, alleging our infringement of a competitor’s patents, we could be prevented from marketing our drugs in one or more
foreign countries. Any of these outcomes would have a materially adverse effect on our business.

In addition, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk
that some of our confidential information could be compromised by disclosure during this type of litigation. Furthermore, adverse results on
United States patents may affect related patents in our global portfolio. The adverse result could also put related pending patent applications
at risk of not issuing. Additionally, there could be public announcements of the results of hearings, motions or other interim proceedings or
developments. 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.

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Interference  proceedings  provoked  by  third  parties  or  brought  by  the  USPTO  may  be  necessary  to  determine  the  priority  of
inventions with respect to our patents or pending patent applications or those of our collaborators or licensors. An unfavorable outcome could
require us to cease using the related technology or to attempt to license rights to it from the prevailing party. The costs of these proceedings
could be substantial. As a result, the issuance, scope, validity, enforceability and commercial value of our or any of our respective licensors
patent  rights  are  highly  uncertain.  Our  business  could  be  harmed  if  the  prevailing  party  does  not  offer  us  a  license  on  commercially
reasonable  terms.  Litigation  or  interference  proceedings  may  fail  and,  even  if  successful,  may  result  in  substantial  costs  and  distract  our
management  and  other  employees.  We  may  not  be  able  to  prevent,  alone  or  with  our  licensors,  misappropriation  of  our  trade  secrets  or
confidential information, particularly in countries where the laws may not protect those rights as fully as in the United States.

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

If  we  or  our  partners  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 commercial success depends upon our ability and the ability of our collaborators to develop, manufacture, market and sell our
drug candidates and use our proprietary technologies without infringing the proprietary rights and intellectual property of third parties. The
biotechnology  and  pharmaceutical  industries  are  characterized  by  extensive  and  frequent  litigation  regarding  patents  and  other  intellectual
property rights. We may in the future become party to, or threatened with, adversarial proceedings or litigation regarding intellectual property
rights with respect to our drug candidates and technology, including interference proceedings before the USPTO.

Our competitors or other third parties may assert infringement claims against us, alleging that our drugs are covered by their patents.
Given the vast number of patents in our field of technology, we cannot be certain that we do not infringe existing patents or that we will not
infringe patents that may be granted in the future. Numerous United States 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 intellectual property. In addition, 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 are not aware. Publications of discoveries in
the scientific literature often lag behind the actual discoveries, and patent applications in the United States 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.

We  are  aware  of  certain  patents  that  may  pose  issues  for  our  commercialization  of  our  drug  candidates.  If  we  decide  to  initiate
proceedings to challenge the validity of these patents in the future, we may be unsuccessful, as courts or patent offices in the United States
and abroad could uphold the validity of any such patents. If we were to challenge the validity of any issued United States patent in court, we
would need to overcome a statutory presumption of validity that attaches to every United States patent. This means that in order to prevail,
we would have to present clear and convincing evidence as to the invalidity of the patent’s claims. If we are unable to do so, we may be
forced to delay the launch of ublituximab or launch at the risk of litigation for patent infringement, which may have a material adverse effect
on our business and results of operations.

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If a third-party claims that we or any collaborators of ours infringe their intellectual property rights, we may have to defend litigation
or administrative proceedings which may be costly whether we win or lose, and which could result in a substantial diversion of our financial
and management resources. If we are found to infringe a third party’s intellectual property rights, we could be required to obtain a license
from such third party to continue developing and marketing our drug candidates and technology. However, we may not be able to obtain any
required  license  on  commercially  reasonable  terms  or  at  all.  Even  if  we  were  able  to  obtain  such  a  license,  it  could  be  granted  on  non-
exclusive  terms,  thereby  providing  our  competitors  and  other  third  parties  access  to  the  same  technologies  licensed  to  us.  Without  such  a
license, we could be forced, including by court order, to cease developing and commercializing the infringing technology or drug candidates.
In addition, we could be found liable for monetary damages, including treble damages and attorney’s fees if we are found to have willfully
infringed such third-party patent rights. A finding of infringement could prevent us from commercializing our drug candidates or force us to
cease some of our business operations, which could materially harm our business.

No assurance can be given that patents issued to third parties do not exist, have not been filed, or could not be filed or issued, which
contain claims covering its products, technology or methods that may encompass all or a portion of our products and methods. Given the
number of patents issued and patent applications filed in our technical areas or fields, we believe there is a risk that third parties may allege
they have patent rights encompassing our products or methods.

Other product candidates that we may in-license or acquire could be subject to similar risks and uncertainties.

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 to commercialize
our products, in which case we would be required to obtain a license from these third parties, whom may or may not be interested in granting
such a license, on commercially reasonable terms, or our business could be harmed, possibly materially. For example, we engage extensively
with third parties, including academic institutions, to conduct non-clinical and clinical research on our product candidates. While we seek to
ensure  all  material  transfer  and  service  agreements  governing  this  research  provide  us  with  favorable  terms  covering  newly  generated
intellectual  property,  a  general  principle  under  which  much  of  this  research  with  academic  institutions  is  conducted  provides  third-party
ownership of newly generated intellectual property, with an exclusive option available for us to obtain a license to such intellectual property.
Through the conduct of this research, it is possible that valuable intellectual property could be developed by a third party, which we will then
need  to  license  in  order  to  better  develop  or  commercialize  our  products.  No  assurance  can  be  given  that  we  will  be  able  to  successfully
negotiate  such  a  license  on  commercially  reasonable  terms,  or  at  all.  Further,  should  we  fail  to  successfully  negotiate  a  license  to  such
intellectual property, most institutions are then free to license such intellectual property to any other third party, including potentially direct
competitors of ours. Should we fail to adequately secure a license to any newly generated intellectual property, our ability to successfully
develop or commercialize our products may be hindered, possibly materially.

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

In  addition  to  the  protection  afforded  by  patents,  we  rely  upon  unpatented  trade  secret  protection,  unpatented  know-how  and
continuing  technological  innovation  to  develop  and  maintain  our  competitive  position.  With  respect  to  the  building  of  our  proprietary
compound  library,  we  consider  trade  secrets  and  know-how  to  be  our  primary  intellectual  property.  We  seek  to  protect  our  proprietary
technology  and  processes,  in  part,  by  entering  into  confidentiality  agreements  with  our  collaborators,  scientific  advisors,  employees  and
consultants,  and  invention  assignment  agreements  with  our  consultants  and  employees.  We  may  not  be  able  to  prevent  the  unauthorized
disclosure or use of our technical know-how or other trade secrets by the parties to these agreements, however, despite the existence generally
of  confidentiality  agreements  and  other  contractual  restrictions.  Monitoring  unauthorized  uses  and  disclosures  is  difficult,  and  we  do  not
know whether the steps we have taken to protect our proprietary technologies will be effective. If any of the collaborators, scientific advisors,
employees and consultants who are parties to these agreements breaches or violates the terms of any of these agreements, we may not have
adequate  remedies  for  any  such  breach  or  violation,  and  we  could  lose  our  trade  secrets  as  a  result.  Enforcing  a  claim  that  a  third  party
illegally obtained and is using our trade secrets, like patent litigation, is expensive and time-consuming, and the outcome is unpredictable. In
addition, courts outside the United States are sometimes less willing to protect trade secrets.

Our trade secrets could otherwise become known or be independently discovered by our competitors. Competitors could purchase
our  drug  candidates  and  attempt  to  replicate  some  or  all  of  the  competitive  advantages  we  derive  from  our  development  efforts,  willfully
infringe our intellectual property rights, design around our protected technology or develop their own competitive technologies that fall

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outside  of  our  intellectual  property  rights.  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  our  trade  secrets  are  not  adequately  protected  so  as  to  protect  our  market  against  competitors’  drugs,  our  competitive
position could be adversely affected, as could our business.

We may be subject to damages resulting from claims that we or our employees have wrongfully used or disclosed alleged trade secrets of
our competitors or are in breach of non-competition or non-solicitation agreements with our competitors.

We could in the future be subject to claims that we or our employees have inadvertently or otherwise used or disclosed alleged trade
secrets or other proprietary information of former employers or competitors. Although we try to ensure that our employees and consultants do
not use the intellectual property, proprietary information, know-how or trade secrets of others in their work for us, we may in the future be
subject to claims that we caused an employee to breach the terms of his or her non-competition or non-solicitation agreement, or that we or
these individuals have, inadvertently or otherwise, used or disclosed the alleged trade secrets or other proprietary information of a former
employer  or  competitor.  Litigation  may  be  necessary  to  defend  against  these  claims.  Even  if  we  are  successful  in  defending  against  these
claims, litigation could result in substantial costs and could be a distraction to management. If our defenses to these claims fail, in addition to
requiring us to pay monetary damages, a court could prohibit us from using technologies or features that are essential to our drug candidates,
if such technologies or features are found to incorporate or be derived from the trade secrets or other proprietary information of the former
employers. An inability to incorporate such technologies or features would have a material adverse effect on our business and may prevent us
from successfully commercializing our drug candidates. In addition, we may lose valuable intellectual property rights or personnel as a result
of  such  claims.  Moreover,  any  such  litigation  or  the  threat  thereof  may  adversely  affect  our  ability  to  hire  employees  or  contract  with
independent sales representatives. A loss of key personnel or their work product could hamper or prevent our ability to commercialize our
drug candidates, which would have an adverse effect on our business, results of operations and financial condition.

Risks Related to Our Business Organization and Governance, Strategy, Employees and Growth Management

If we fail to attract and keep key management, commercial, and clinical development personnel, we may be unable to successfully develop
or commercialize our product candidates.

We are highly dependent on the research and development, commercialization, manufacturing, quality, financial and legal expertise
of our senior management team as well as the other principal members of our management. Although we have entered into an employment
agreement with our chief executive officer and employment letters with our senior managers, each of our executive officers may terminate
their employment with us at any time. We do not maintain key person insurance for any of our executives or other employees. In addition, we
rely  on  consultants  and  advisors,  including  scientific  and  clinical  advisors,  to  assist  us  in  formulating  our  research  and  development  and
commercialization strategy. Our consultants and advisors may be employed by employers other than us and may have commitments under
consulting or advisory contracts with other entities that may limit their availability to us. If we are unable to continue to attract and retain high
quality personnel, our ability to pursue our growth strategy will be limited.

We expect to continue hiring qualified development and commercialization personnel. Recruiting and retaining qualified scientific,
clinical,  manufacturing  and  sales  and  marketing  personnel  will  be  critical  to  our  success.  The  loss  of  the  services  of  our  chief  executive
officer or other key employees could impede the achievement of our research, development and commercialization objectives and seriously
harm our ability to successfully implement our business strategy. Furthermore, replacing key employees may be difficult and may take an
extended period of time because of the limited number of individuals in our industry with the breadth of skills and experience required to
successfully develop, gain regulatory approval of and commercialize products. Competition to hire from this limited pool is intense, and we
may  be  unable  to  hire,  train,  retain  or  motivate  these  key  personnel  on  acceptable  terms  given  the  competition  among  numerous
pharmaceutical  and  biotechnology  companies  for  similar  personnel.  Failure  to  succeed  in  clinical  trials  may  make  it  more  challenging  to
recruit and retain qualified medical and scientific personnel. If we are not able to attract and retain the 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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We will need to develop and expand our business, and we may encounter difficulties in managing this development and expansion, which
could disrupt our operations.

We  may  attempt  to  expand  our  business  by  acquiring  additional  businesses  or  drugs,  forming  strategic  alliances  or  creating  joint
ventures with third parties. We may encounter numerous difficulties in developing, manufacturing and marketing any new products resulting
from any such arrangement or transaction that may delay or prevent us from realizing their expected benefits. If we are unable to successfully
integrate such acquired businesses with our existing operations and company culture, we may never realize the benefits of such acquisitions
or  strategic  alliances.  We  cannot  assure  you  that,  following  any  such  transaction,  we  will  achieve  the  expected  synergies  to  justify  the
transaction.

Expanding our business will increase our operating needs. As of February 18, 2021, we had 272 full -time employees, and we expect
to continue to increase our number of employees and expand the scope of our operations. Our management and medical, commercial, and
scientific personnel, systems and facilities currently in place may not be adequate to support our anticipated future growth. To manage our
anticipated  future  growth,  we  must  continue  to  implement  and  improve  our  managerial,  operational  and  financial  systems,  expand  our
facilities and continue to recruit and train additional qualified personnel. Also, our management may need to divert a disproportionate amount
of its attention away from its day-to-day activities and devote a substantial amount of time to managing these development activities. Due to
our  limited  resources,  we  may  not  be  able  to  effectively  manage  the  expansion  of  our  operations  or  recruit  and  train  additional  qualified
personnel.  This  may  result  in  weaknesses  in  our  infrastructure,  give  rise  to  operational  mistakes,  loss  of  business  opportunities,  loss  of
employees and reduced productivity among remaining employees. To accommodate growth, additional physical expansion of our operations
in the future may lead to significant costs, including capital expenditures, and may divert financial resources from other projects, such as the
development  of  our  drug  candidates.  If  our  management  is  unable  to  effectively  manage  our  expected  development  and  expansion,  our
expenses  may  increase  more  than  expected,  our  ability  to  generate  or  increase  our  revenue  could  be  reduced  and  we  may  not  be  able  to
implement our business strategy. Our future financial performance and our ability to commercialize our drug candidates, if approved, and
compete effectively will depend, in part, on our ability to effectively manage the future development and expansion of our business.

Additionally, to help manage the expanding needs, we may utilize the services of outside vendors or consultants to perform tasks
including clinical trial management, statistics and analysis, regulatory affairs, formulation development, chemistry, manufacturing, controls,
and other pharmaceutical development functions. Our growth strategy may also entail expanding our group of contractors or consultants to
implement these tasks going forward. Because we rely on a substantial number of consultants, effectively outsourcing many key functions of
our  business,  we  will  need  to  be  able  to  effectively  manage  these  consultants  to  ensure  that  they  successfully  carry  out  their  contractual
obligations  and  meet  expected  deadlines.  However,  if  we  are  unable  to  effectively  manage  our  outsourced  activities  or  if  the  quality  or
accuracy of the services provided by consultants is compromised for any reason, our clinical trials may be extended, delayed or terminated,
and  we  may  not  be  able  to  obtain  regulatory  approval  for  our  product  candidates  or  otherwise  advance  our  business.  There  can  be  no
assurance  that  we  will  be  able  to  manage  our  existing  consultants  or  find  other  competent  outside  contractors  and  consultants  on
economically reasonable terms, or at all. If we are not able to effectively expand our organization by hiring new employees and expanding
our groups of consultants and contractors, we may be unable to successfully implement the tasks necessary to advance the commercialization
of UKONIQ and further develop and commercialize our product candidates and, accordingly, may not achieve our research, development and
commercialization goals.

Certain anti-takeover provisions in our governing documents and Delaware law could make a third-party acquisition of us difficult. This
could limit the price investors might be willing to pay in the future for our common stock.

Certain provisions in our amended and restated certificate of incorporation and restated bylaws may make it more difficult for a third
party to acquire us, or discourage a third party from attempting to acquire or control us and may limit the price that certain investors might be
willing to pay in the future for shares of our common stock. For example, our amended and restated certificate of incorporation allows us to
issue  preferred  stock  without  the  approval  of  our  stockholders,  the  issuance  of  which  could  decrease  the  amount  of  earnings  and  assets
available  for  distribution  to,  or  affect  the  rights  and  powers  (including  voting  rights)  of,  of  our  common  stockholders.  In  certain
circumstances,  such  issuance  could  have  the  effect  of  decreasing  the  market  price  of  our  common  stock.  In  addition,  our  restated  bylaws
eliminate the right of stockholders to call a special meeting of stockholders, which could make it more difficult for stockholders to effect
certain corporate actions. Any of these provisions could also have the effect of delaying or preventing a change in control.

On July 18, 2014, the Board of Directors declared a distribution of one right for each outstanding share of common stock. The rights
may have certain anti-takeover effects. The rights will cause substantial dilution to a person or group that attempts to acquire us on terms not
approved  by  the  Board  of  Directors  unless  the  offer  is  conditioned  on  a  substantial  number  of  rights  being  acquired.  However,  the  rights
should not interfere with any merger, statutory share exchange or other business combination approved by the Board of Directors

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since the rights may be terminated by us upon resolution of the Board of Directors. Thus, the rights are intended to encourage persons who
may seek to acquire control of the Company to initiate such an acquisition through negotiations with the Board of Directors. However, the
effect of the rights may be to discourage a third party from making a partial tender offer or otherwise attempting to obtain a substantial equity
position in the equity securities of, or seeking to obtain control of, the Company. To the extent any potential acquirers are deterred by the
rights, the rights may have the effect of preserving incumbent management in office.

Our ability to utilize our net operating loss carryforwards and certain other tax attributes may be limited.

Under Section 382 of the Internal Revenue Code of 1986, as amended, if a corporation undergoes an ownership change (generally
defined as a greater than 50% change (by value) in the ownership of its equity over a three year period), the corporation’s ability to use its
pre-change net operating loss carryforwards and certain other pre-change tax attributes to offset its post-change income may be limited. We
may have experienced such ownership changes in the past, and we may experience ownership changes in the future as a result of shifts in our
stock  ownership,  some  of  which  are  outside  our  control.  As  of  December  31,  2020,  we  had  federal  net  operating  loss  carryforwards  of
approximately 956.3 million, and our ability to utilize those net operating loss carryforwards could be limited by an ownership change as
described above, which could result in increased tax liability to us. In addition, pursuant to the Tax Act, we may not use net operating loss
carry-forwards to reduce our taxable income in any year by more than 80%, and we may not carry back any net operating losses to prior
years.  On  March  27,  2020,  the  “CARES  Act”  was  signed  by  the  U.S.  President.  Certain  provisions  of  the  CARES  Act  alter  the  rules
regarding net-operating losses for such losses arising in 2018, 2019 and 2020. Such losses may be carried back for five years. We cannot
assure you, however, of our ability to utilize these favorable offset rules within the applicable time period. These rules apply regardless of the
occurrence of an ownership change.

Certain of our executive officers, directors, principal stockholders and their affiliates maintain the ability to exercise significant influence
over our company and all matters submitted to stockholders for approval.

Certain of our executive officers, directors and stockholders own more than 10% of our outstanding common stock and, together
with their affiliates and related persons, beneficially own a significant percentage of our capital stock. If these stockholders were to choose to
act  together,  they  would  be  able  to  influence  our  management  and  affairs  and  the  outcome  of  matters  submitted  to  our  stockholders  for
approval,  including  the  election  of  directors  and  any  sale,  merger,  consolidation,  or  sale  of  all  or  substantially  all  of  our  assets.  This
concentration of voting power could delay or prevent an acquisition of our company on terms that other stockholders may desire. In addition,
this concentration of ownership might adversely affect the market price of our common stock by:

● delaying, deferring or preventing a change of control of us;
● impeding a merger, consolidation, takeover or other business combination involving us; or
● discouraging a potential acquirer from making a tender offer or otherwise attempting to obtain control of us.

Our internal computer systems, or those of our third-party CROs, CMOs, or other contractors or consultants, may fail or suffer security
breaches, which could result in a material disruption of our drug candidates’ development programs and our commercialization of any
products for which we receive regulatory approval.

Despite  the  implementation  of  security  measures,  our  internal  computer  systems  and  those  of  our  third-party  CROs,  CMOs,  and
other  contractors  and  consultants  are  vulnerable  to  damage  from  computer  viruses,  unauthorized  access,  cyber-attacks  or  cyber-intrusions
over the Internet, natural disasters, terrorism, war and telecommunication and electrical failures.  Although we have been the targets of cyber-
attacks  and  cyber-intrusions,  the  impact  on  our  operations  and  financial  condition  has  not  been  material.    We  expect  such  cybersecurity
threats to continue and become more sophisticated.  A significant cyber-attack or cyber-intrusion could cause our systems to fail, leakage of
confidential information, or business interruption, which could result in a material disruption of our operations, financial loss, or reputational
harm.  For  example,  the  loss  of  clinical  trial  data  for  our  drug  candidates  could  result  in  delays  in  our  regulatory  approval  efforts  and
significantly increase our costs to recover or reproduce the data.  We have invested in protections and monitoring practices of our data and
information  technology  systems  to  reduce  these  risks  and  expect  to  continue  do  so  as  our  computer  systems  increase  in  magnitude  and
complexity.  However, there can be no assurance that our efforts and investments will prevent breakdowns or breaches in our systems that
could adversely affect our business.

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

Our  results  of  operations  could  be  adversely  affected  by  general  conditions  in  the  global  economy  and  in  the  global  financial
markets. For example, the COVID-19 pandemic has caused extreme volatility and disruptions in the capital and credit markets. A severe or
prolonged economic downturn could result in a variety of risks to our business, including, weakened demand for our drug candidates and our
ability to raise additional capital when needed on acceptable terms, if at all. A weak or declining economy could also strain our suppliers,
possibly resulting in supply disruption, or cause our customers to delay making payments for our services.

On January 31, 2019 (Brexit Day), the United Kingdom formally left the European Union. Although Brexit has already and may
continue  to  adversely  affect  European  and/or  worldwide  economic  or  market,  political  or  regulatory  conditions  and  may  contribute  to
instability in the global financial markets, political institutions and regulatory agencies, the resulting immediate changes in foreign currency
exchange rates have had a limited overall impact due to natural hedging. Although the United Kingdom and the European Union reached a
trade  agreement  in  late  2020,  the  long-term  impact  of  Brexit,  including  on  our  business  and  our  industry,  remains  uncertain.    Despite  the
Brexit developments, we do not expect macroeconomic conditions to have a significant impact on our liquidity needs, financial condition or
results of operations. 

Our employees, principal investigators, CROs, CMOs and consultants may engage in misconduct or other improper activities, including
non-compliance  with  regulatory  standards  and  requirements  and  insider  trading,  which  could  have  a  material  adverse  effect  on  our
business.

We  are  exposed  to  the  risk  that  our  employees,  principal  investigators,  CROs,  CMOs,  and  consultants  may  engage  in  fraudulent
conduct  or  other  illegal  activity.  Misconduct  by  these  parties  could  include  intentional  failures  to  comply  with  FDA  regulations,  provide
accurate information to the FDA, comply with manufacturing standards we have established, comply with federal and state healthcare fraud
and abuse laws and regulations, report financial information or data accurately 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,
misconduct, 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. Activities subject to
these laws also involve the improper use of information obtained in the course of clinical trials or creating fraudulent data in our pre-clinical
studies  or  clinical  trials,  which  could  result  in  regulatory  sanctions  and  cause  serious  harm  to  our  reputation.  We  have  adopted  a  code  of
ethics  applicable  to  all  of  our  employees  and  have  implemented  a  compliance  program,  but  it  is  not  always  possible  to  identify  and  deter
misconduct  by  employees  and  other  third  parties,  and  the  precautions  we  take  to  detect  and  prevent  this  activity  may  not  be  effective  in
controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming
from a failure to comply with these laws or regulations. In addition, we are subject to the risk that a person could allege such fraud or other
misconduct, even if none occurred. If any such actions are instituted against us, regardless of the outcome, our reputation and our business
may suffer.  If we are not successful in defending ourselves or asserting our rights, those actions could lead to imposition of civil, criminal
and  administrative  penalties,  damages,  monetary  fines,  possible  exclusion  from  participation  in  Medicare,  Medicaid  and  other  federal
healthcare programs, contractual damages, reputational harm, diminished profits and future earnings, and curtailment of our operations, any
of which could adversely affect our ability to operate our business.

We may acquire businesses or drugs, or form strategic alliances, in the future, and we may not realize the benefits of such acquisitions.

We may acquire additional businesses or drugs, form strategic alliances or create joint ventures with third parties that we believe will
complement  or  augment  our  existing  business.  If  we  acquire  businesses  with  promising  markets  or  technologies,  we  may  not  be  able  to
realize  the  benefit  of  acquiring  such  businesses  if  we  are  unable  to  successfully  integrate  them  with  our  existing  operations  and  company
culture. We may encounter numerous difficulties in developing, manufacturing and marketing any new products resulting from a strategic
alliance or acquisition that delay or prevent us from realizing their expected benefits or enhancing our business. We cannot assure you that,
following any such acquisition, we will achieve the expected synergies to justify the transaction.

We may be subject to adverse legislative or regulatory tax changes that could negatively impact our financial condition.

The  rules  dealing  with  U.S.  federal,  state  and  local  income  taxation  are  constantly  under  review  by  persons  involved  in  the
legislative process and by the IRS and the U.S. Treasury Department. Changes to tax laws (which changes may have retroactive application)
could adversely affect our stockholders or us. In recent years, many such changes have been made and changes are likely to continue to occur
in the future. We cannot predict whether, when, in what form, or with what effective dates, tax laws, regulations and rulings may be enacted,
promulgated or decided, which could result in an increase in our, or our stockholders, tax liability or require changes in the manner in which
we operate in order to minimize increases in our tax liability.

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On  December  22,  2017,  legislation  commonly  referred  to  as  the  Tax  Act  was  signed  into  law  and  is  generally  effective  after
December  31,  2017.  The  Tax  Act  makes  significant  changes  to  the  United  States  federal  income  tax  rules  for  taxation  of  individuals  and
business entities. Most of the changes applicable to individuals are temporary and apply only to taxable years beginning after December 31,
2017 and before January 1, 2026. For corporations, the Tax Act reduces the top corporate income tax rate to 21% and repeals the corporate
alternative  minimum  tax,  limits  the  deduction  for  net  interest  expense,  limits  the  deduction  for  net  operating  losses  and  eliminates  net
operating loss carrybacks, modifies or repeals many business deductions and credits, shifts the United States toward a more territorial tax
system, and imposes new taxes to combat erosion of the U.S. federal income tax base. The Tax Act makes numerous other large and small
changes to the federal income tax rules that may affect potential investors and may directly or indirectly affect us. We continue to examine
the impact this tax reform legislation may have on our business. However, the effect of the Tax Act on us, whether adverse or favorable, is
uncertain, and may not become evident for some period of time. This document does not discuss such legislation or the manner in which it
might affect us or purchasers of our common stock. Prospective investors are urged to consult with their legal and tax advisors with respect to
the Tax Act and any other regulatory or administrative developments and proposals, and their potential effects on them based on their unique
circumstances.

Risks Related to the COVID-19 Pandemic

Major public health issues, and specifically the pandemic caused by COVID-19, could have an adverse impact on our financial condition
and results of operations and other aspects of our business.

In  December  2019,  a  novel  strain  of  coronavirus  which  causes  a  disease  referred  to  as  COVID-19,  was  first  detected  in  Wuhan,
China,  and  has  since  spread  around  the  world.  On  March  11,  2020,  the  World  Health  Organization  declared  that  the  rapidly
spreading  COVID-19  outbreak  had  evolved  into  a  pandemic.  In  response  to  the  pandemic,  many  governments  around  the  world  have
implemented a variety of control measures to reduce the spread of COVID-19, including travel restrictions and bans, instructions to residents
to practice social distancing, quarantine advisories, shelter-in-place orders and required closures of non-essential businesses.

The  COVID-19  pandemic  has  negatively  impacted  the  global  economy,  disrupted  global  supply  chains,  and  created  significant
volatility and disruption of financial markets. Although COVID-19 has not had a material adverse effect on our business to date, no assurance
can  be  given  that  it  will  not  in  the  future  if  the  situation  persists  or  worsens.  The  extent  to  which  the  COVID-19  pandemic  impacts  our
business and operating results will depend on future developments that are highly uncertain and cannot be accurately predicted, including
new information that may emerge concerning the virus, the duration, spread and severity of the COVID-19 pandemic, the rate of vaccination
and efficacy of approved vaccines against the virus and any variant strains of the virus, other actions to contain the virus or treat its impact,
and how quickly and to what extent normal economic and operating conditions can resume if and when the pandemic subsides, among others.

Should the COVID-19 pandemic persist or worsen and government restrictions continue, our business operations could be materially
delayed or interrupted. For instance, our ongoing clinical trials may be delayed or compromised; our ability to conduct new clinical trials may
be adversely impacted; our supply chain may be disrupted; health authority inspections of clinical sites or manufacturing facilities, or review
of our regulatory submissions may be delayed, and our commercialization efforts may be impacted.  It is unknown how long these disruptions
could  continue,  were  they  to  occur.  Any  delay  in  our  clinical  trials,  preapproval  inspections  or  in  regulatory  review  resulting  from  such
disruptions could materially affect the development and commercialization of our product candidates.  

We currently rely on third parties for certain functions or services in support of our clinical trials and key areas of our operations.
These  third  parties  include  contract  research  organizations  (CROs),  medical  institutions  and  clinical  investigators,  contract  manufacturing
organizations,  suppliers,  and  external  business  partners  supporting  commercialization  of  UKONIQ.  If  these  third  parties  themselves  are
adversely impacted by restrictions resulting from the COVID-19 outbreak, we will likely experience delays and/or realize additional costs. As
a result, our efforts to commercialize UKONIQ and obtain regulatory approvals for, and to commercialize, our product candidates may be
delayed or disrupted.

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In addition, as a result of government directives on social distancing and to protect the health of our workforce, we have asked our
office-based employees to work remotely and have restricted domestic and international travel indefinitely. Third parties on which we rely
may  also  increase  their  use  of  remote  working  arrangements  in  response  to  COVID-19.  Our  increased  reliance  on  personnel  working
remotely may negatively impact productivity, including our ability to monitor clinical trials, prepare regulatory applications, and conduct data
analysis, or disrupt, delay, or otherwise adversely impact our business. In addition, remote working could increase our cybersecurity risk and
make us more susceptible to communication disruptions, any of which could adversely impact our business operations or delay necessary
interactions with local and federal regulators, manufacturing sites, research or clinical trial sites and contractors.

Our ability to successfully commercialize UKONIQ, and any of our product candidates for which we in the future obtain regulatory
approval, also may be adversely impacted by restrictions and safety measures instituted due to COVID-19.  For example, reduced access to
healthcare providers and institutions as a result of social distancing protocols has impacted our commercialization activities, including, the
manner in which our field teams engage with healthcare providers and facilities.  Our compliance monitoring and oversight of interactions
and communications with HCPs, payors, and other stakeholders may also be impacted by the remote work environment.  

The potential economic impact brought by and the duration of the pandemic may be difficult to assess or predict. However, it has
already caused, and is likely to result in further, significant disruption of global financial markets. It is likely that the pandemic will cause an
economic slowdown of potentially extended duration, and it is possible that it could cause a global recession. This disruption may reduce our
ability  to  access  capital  either  at  all  or  on  favorable  terms.  In  addition,  a  recession,  depression  or  other  sustained  adverse  market  event
resulting from the spread of COVID-19 could materially and adversely affect our business and the value of our common stock.

The ultimate impact of the current pandemic, or any other health epidemic, is highly uncertain and subject to change. We do not yet
know the full extent of potential delays or impacts on our business, our clinical trials, our research programs, healthcare systems or the global
economy  as  a  whole.  However,  these  effects  could  have  a  material  adverse  effect  on  our  business,  financial  condition  and  results  of
operations.

To the extent the COVID-19 pandemic materially adversely affects our business and financial results, it may also have the effect of

significantly heightening many of the other risks described in this Risk Factors section.

The  COVID-19  pandemic  could  have  a  material  adverse  effect  on  our  clinical  development  program  if  the  pandemic  and  associated
government control measures continue.

The ongoing COVID-19 pandemic has presented substantial public health challenges and is impacting the global healthcare system,
including the conduct of clinical trials in the U.S. and other parts of the world. As a result of the COVID-19 pandemic, we may encounter
delays  in  our  clinical  development  program.    The  majority  of  our  clinical  trials  involve  patients  with  cancer  or  those  receiving  ongoing
immunosuppressive therapy who may be at higher risk of infection. These patients are thus more likely to be subject to travel restrictions and
self-quarantining and may be more likely to withdraw from our clinical trials or unable to complete study assessments. We have made efforts
to allow patients currently enrolled in our ongoing clinical trials to continue unimpeded and have continued to allow new patients to enroll in
our  trials.  While  we  have  allowed  continued  enrollment  to  our  trials,  many  trial  sites  have  limited  enrollment  or  suspended  enrollment
entirely in response to the COVID-19 pandemic, which may affect our ability to enroll to our trials and meet our projected timelines.  

The  UNITY-NHL  FL  and  MZL  monotherapy  cohorts,  the  UNITY-CLL  and  the  ULTIMATE  I  and  II  trials  are  fully  enrolled.
However, follow-up is ongoing and data continue to be collected from these or related follow-up studies.  These data collection efforts rely on
study participants’ ability to contribute such data, often through study specific visits and procedures that can only be conducted in-person.
 While we anticipate minimal impact from COVID-19 on the previously estimated timelines for these trials, no guarantee can be made that
our estimated timelines, or the ultimate outcome from these trials, will not be materially negatively impacted by the COVID-19 pandemic.  

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Further, we may not be able to complete our clinical trials that we initiated more recently and for which we have not yet completed
enrollment  in  the  time  frame  that  we  had  previously  planned.    In  addition,  the  pandemic  may  adversely  affect  our  ability  to  conduct  new
trials.  Some  factors  from  the  COVID-19  outbreak  that  may  delay  or  otherwise  adversely  affect  our  clinical  trial  programs,  as  well  as
adversely impact our business generally, include:

● delays  or  difficulties  in  clinical  site  initiation,  including  difficulties  in  recruiting  and  retaining  clinical  sites,  impacts  on
compliance  with  clinical  study  protocols,  delays  enrolling  patients  in  our  clinical  trials,  decreased  enrollment  in  our  clinical
trials or increased rates of patients withdrawing from our clinical trials following enrollment, in each case, as a result of patients
contracting COVID-19, being forced to quarantine, experiencing reluctance to seek medical attention in a healthcare facility
setting, or otherwise not being able or willing to complete study assessments, particularly for older patients or others with a
higher risk of contracting COVID-19;
impacts to clinical results, including an increased number of observed adverse events, as a result of participants enrolled in our
clinical trials contracting COVID-19;
prioritization by healthcare providers, facilities, lawmakers, and regulators of COVID-19-related healthcare needs or, when the
pandemic subsides, to address the potential backlog of patients who have deferred medical procedures during the pendency of
the pandemic, which may reduce availability of professionals and resources for clinical trials in other disease areas;

●

●

●

● limitations  on  travel,  including  limitations  on  domestic  and  international  travel,  and  government-imposed  quarantines  or
restrictions  imposed  by  key  third  parties  that  could  interrupt  key  trial  activities,  such  as  clinical  trial  site  initiations  and
monitoring, which could impact the reliability or integrity of subject data and clinical study endpoints;
interruption of, or delays in receiving, supplies of our product candidates from our contract manufacturing organizations due to
staffing shortages, production slowdowns or stoppages or interruption in global shipping that may affect the transport of clinical
trial materials;
disruptions and delays caused by potential workplace, laboratory and office closures and an increased reliance on employees
working from home across the healthcare system;

●

● disruptions  in  or  delays  to  regulatory  reviews,  responses,  inspections,  or  other  regulatory  activities,  including  review  of
marketing applications and approvals of protocol changes or amendments to Special Protocol Assessments (SPA), as a result of
the  spread  of  COVID-19  affecting  the  operations  of  the  U.S.  Food  and  Drug  Administration  (FDA)  or  other  regulatory
authorities;

● changes  in  local  regulations  as  part  of  a  response  to  the  COVID-19  pandemic  which  may  require  us  to  change  the  ways  in

which clinical trials are conducted, which may result in unexpected costs, or to discontinue the clinical trials altogether;

● refusal of the FDA to accept data from clinical trials in affected geographies outside the United States; and
● negative effects on the quality, completeness, integrity, interpretability and cost of our clinical study data.

The potential disruptions discussed above and other consequences of the COVID-19 pandemic could result in missed study visits or
study procedures in our clinical trials, which could lead to an abundance of protocol deviations that impact  the  interpretability  of  the  trial
results.  A significant number of deviations may call into question whether the execution of a clinical trial was consistent with the protocol,
which  is  of  particular  importance  where  study  designs  were  agreed  to  as  part  of  a  SPA  as  in  the  case  of  our  Phase  3  clinical  trial  for  the
combination of ublituximab plus UKONIQ for patients with chronic lymphocytic leukemia (UNITY-CLL) and our registration program for
ublituximab  in  relapsing  multiple  sclerosis  (ULTIMATE  I  and  II).    In  extreme  cases,  significant  deviations  from  the  protocol  may  be
considered a violation of the SPA and result in potential rescindment of the SPA agreement, which could adversely affect our ability to use
the results of the impacted study to support a future regulatory application.

We will continue to monitor the potential impact of COVID-19 on our clinical trial program, however, the full extent to which the
COVID-19 pandemic may directly or indirectly impact the progress of our current and planned trials will depend on future developments that
are highly uncertain and cannot be accurately predicted.

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General Risks

Risks Related to Our Common Stock and Being a Publicly-Traded Company

Our stock price is, and we expect it to remain, volatile, which could limit investors ability to sell stock at a profit.

The trading price of our common stock has been and is likely to continue to be highly volatile and subject to wide fluctuations in

price in response to various factors, many of which are beyond our control. These factors include:

● publicity regarding actual or potential clinical results relating to products under development by our competitors or us;
● delay or failure in initiating, completing or analyzing nonclinical or clinical trials or the unsatisfactory design or results of these

trials;

● achievement or rejection of regulatory approvals by our competitors or us;
● announcements of technological innovations or new commercial products by our competitors or us;
● developments concerning proprietary rights, including patents;
● developments concerning our collaborations;
● regulatory developments in the United States and foreign countries;
● economic  or  other  crises  and  other  external  factors  such  as  the  disruptions  in  the  global  economy  caused  by  the  COVID-19

pandemic;

● period-to-period fluctuations in our revenues and other results of operations;
● changes in financial estimates by securities analysts; and
● sales of our common stock by us.

We will not be able to control many of these factors, and we believe that period-to-period comparisons of our financial results will

not necessarily be indicative of our future performance.

In addition, the stock market in general, and the market for biotechnology companies in particular, has experienced extreme price
and volume fluctuations that may have been unrelated or disproportionate to the operating performance of individual companies. These broad
market and industry factors may seriously harm the market price of our common stock, regardless of our operating performance.

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

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

An active trading market for our common stock may not be sustained, and investors may not be able to resell their shares at or above the
price they paid.

Although  we  have  listed  our  common  stock  on  the  Nasdaq  Capital  Market,  an  active  trading  market  for  our  shares  may  not  be
sustained. In the absence of an active trading market for our common stock, investors may not be able to sell their common stock at or above
the price at which they acquired their shares or at the time that they would like to sell. An inactive trading market may also impair our ability
to raise capital to continue to fund operations by selling shares and may impair our ability to acquire other companies or technologies by
using our shares as consideration.

If equity research analysts do not publish research or reports about our business or if they publish negative evaluations of or downgrade
our common stock, the price of our common stock could decline.

The trading market for our common stock relies in part on the research and reports that equity research analysts publish about us or
our business. We do not control these analysts. We may never obtain research coverage by industry or financial analysts. If no or few analysts

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commence coverage of us, the trading price of our stock would likely decrease. Even if we do obtain analyst coverage, if one or more of the
analysts covering our business downgrade their evaluations of our common stock, the price of our common stock could decline. If one or
more of these analysts cease to cover our common stock, we could lose visibility in the market for our common stock, which in turn could
cause our common stock price to decline.

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

As a public company, we incur significant legal, accounting and other expenses under the Sarbanes-Oxley Act of 2002, as well as
rules  subsequently  implemented  by  the  SEC,  and  the  rules  of  any  stock  exchange  on  which  we  are  listed.  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  team  has  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 of 2002 requires, among other things, that we maintain effective internal control over financial reporting
and  disclosure  controls  and  procedures.  As  a  result,  we  are  required  to  periodically  perform  an  evaluation  of  our  internal  control  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 control
over  financial  reporting.  These  efforts  to  comply  with  Section  404  will  require  the  commitment  of  significant  financial  and  managerial
resources. While we anticipate maintaining the integrity of our internal control 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 control, which could
have an adverse effect on the market price of our stock.

Volatility  in  the  price  of  our  common  stock  may  subject  us  to  securities  litigation,  which  could  cause  us  to  incur  substantial  costs  and
divert management’s attention, financial resources and other company assets.

In the past, securities class action litigation has often been brought against a company following periods of volatility in the market
price  of  its  securities.  This  risk  is  especially  relevant  for  us  because  pharmaceutical  companies  have  experienced  significant  stock  price
volatility in recent years. Past lawsuits and any future lawsuits to which we may become a party are subject to inherent uncertainties and will
likely  be  expensive  and  time-consuming  to  investigate,  defend  and  resolve,  and  will  divert  our  management’s  attention  and  financial  and
other resources. The outcome of litigation is necessarily uncertain, and we could be forced to expend significant resources in the defense of
these and other suits, and we may not prevail. Any litigation to which we are a party may result in an onerous or unfavorable judgment that
may not be reversed upon appeal or in payments of substantial monetary damages or fines, or we may decide to settle this or other lawsuits
on similarly unfavorable terms, which could adversely affect our business, financial condition, results of operations or stock price.

Future sales of our common stock, including by us or our directors and executive officers or shares issued upon the exercise of currently
outstanding options, could cause our stock price to decline.

A substantial portion of our outstanding common stock can be traded without restriction at any time. In addition, a portion of our
outstanding  common  stock  is  currently  restricted  as  a  result  of  federal  securities  laws,  but  can  be  sold  at  any  time  subject  to  applicable
volume limitations. As such, sales of a substantial number of shares of our common stock in the public market could occur at any time. These
sales,  or  the  perception  in  the  market  that  the  holders  of  a  large  number  of  shares  intend  to  sell  shares,  by  us  or  others,  could  reduce  the
market price of our common stock or impair our ability to raise adequate capital through the sale of additional equity securities. In addition,
we have a significant number of shares that are subject to outstanding options. The exercise of these options and the subsequent sale of the
underlying  common  stock  could  cause  a  further  decline  in  our  stock  price.  These  sales  also  might  make  it  difficult  for  us  to  sell  equity
securities in the future at a time and at a price that we deem appropriate. We cannot predict the number, timing or size of future issuances or
the effect, if any, that any future issuances may have on the market price for our common stock.

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ITEM 2. PROPERTIES.

We maintain corporate and executive space in New York, New York, and Edison, New Jersey. We are also currently leasing small
office spaces in Raleigh, North Carolina and Kingsport, Tennessee. We believe that our existing facilities are adequate to meet our current
requirements. We do not own any real property.

ITEM 3. LEGAL PROCEEDINGS.

We, and our subsidiaries, are not a party to, and our property is not the subject of, any material pending legal proceedings.

ITEM 4. MINE SAFETY DISCLOSURES.

None.

PART II

ITEM  5.  MARKET  FOR  REGISTRANT’S  COMMON  EQUITY,  RELATED  STOCKHOLDER  MATTERS  AND  ISSUER
PURCHASES OF EQUITY SECURITIES.

Market Information

Our common stock is listed on the Nasdaq Capital Market and trades under the symbol “TGTX”.

Holders

The number of record holders of our common stock as of February 24, 2021 was 235.

Dividends

We have never declared or paid any cash dividends on our common stock and do not anticipate paying any cash dividends in the

foreseeable future. Any future determination to pay dividends will be at the discretion of our board of directors.

Securities Authorized for Issuance Under Equity Compensation Plans

The following table provides information as of December 31, 2020, regarding the securities authorized for issuance under our equity

compensation plan, the TG Therapeutics, Inc. Amended and Restated 2012 Incentive Plan.

Equity Compensation Plan Information

Plan Category

Number of
securities to be
issued upon
exercise of
outstanding
options

Weighted-average
exercise price of
outstanding
options

Number of
securities
remaining
available for
future issuance
under equity
compensation
plans (excluding
securities reflected
in column 1)

Equity compensation plans approved by security holders
Equity compensation plans not approved by security holders
Total

 2,526,166
 —
 2,526,166

$

$

 6.99
 —
 6.99

 4,054,913
 —
 4,054,913

For information about all of our equity compensation plans see Note 5 to our Consolidated Financial Statements included in this

report.

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COMMON STOCK PERFORMANCE GRAPH

The  following  graph  compares  the  cumulative  total  stockholder  return  on  our  common  stock  for  the  period  from  December  31,
2015 through December 31, 2020, with the cumulative total return over such period on (i) the U.S. Index of The Nasdaq Stock Market and
(ii) the Biotechnology Index of The Nasdaq Stock Market. The graph assumes an investment of $100 on December 31, 2015, in our common
stock  (at  the  adjusted  closing  market  price)  and  in  each  of  the  indices  listed  above,  and  assumes  the  reinvestment  of  all  dividends.
Measurement points are December 31 of each year.

*     $100 invested on December 31, 2015 in stock or index, including reinvestment of dividends. Fiscal Years ending December 31.

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ITEM 6. SELECTED FINANCIAL DATA.

The following Statement of Operations Data for the years ended December 31, 2020, 2019, 2018, 2017 and 2016, and Balance Sheet
Data as of December 31, 2020, 2019, 2018, 2017 and 2016, as set forth below are derived from our audited consolidated financial statements.
Audited  financial  statements  prior  to  2018  are  not  contained  herein.  This  financial  data  should  be  read  in  conjunction  with  “Item  7.
Management’s  Discussion  and  Analysis  of  Financial  Condition  and  Results  of  Operations”  and  “Item  8.  Financial  Statements  and
Supplementary Data.”

(in thousands, except per share information)

License revenue

Costs and expenses:

Research and development:
Noncash stock expense associated with in-licensing agreements
Noncash compensation
Other research and development

Total research and development

General and administrative:
Noncash compensation
Other general and administrative

Total general and administrative

Total costs and expenses

Operating loss

Other (income) expense:

Interest expense
Other income

Total other (income) expense, net

2020

Years ended December 31, 
2018

2019

2017

2016

$

 152

$

 152

$

 152

$

 152

$

 152

 —  

 13,962
 151,934
 165,896

 100
 5,811
 148,269
 154,180

 4,000
 5,598
 149,793
 159,391

 —  

 5,647
 96,886
 102,533

 —
 2,742
 66,490
 69,232

 66,327
 41,523
 107,850

 5,523
 9,504
 15,027

 7,288
 7,873
 15,161

 10,298
 6,033
 16,331

 4,767
 5,122
 9,889

 273,746

 169,207

 174,552

 118,864

 79,121

   (273,594)

   (169,055)

   (174,400)

   (118,712)

 (78,969)

 6,329
 (542)
 5,787

 5,287
 (1,471)
 3,816

 877
 (1,795)
 (918)

 845
 (1,081)
 (236)

 886
 (1,602)
 (716)

Net loss

$  (279,381)

$  (172,871)

$  (173,482)

$  (118,476)

$  (78,253)

Basic and diluted net loss per common share

$

 (2.42)

$

 (1.96)

$

 (2.30)

$

 (1.91)

$

 (1.60)

Balance Sheet Information:

(in thousands)
Cash, cash equivalents, investment securities and interest receivable
Total assets
Accumulated deficit
Total equity

2020
$  605,426
 625,642
   (980,597)
 519,350

2019
$  140,435
 163,014
   (701,216)
 38,615

$

December 31, 
2018
 68,901
 83,616
   (528,345)
 24,036

$

2017
 84,825
 97,381
   (354,863)
 66,993

$

2016
 44,969
 54,782
 (236,387)
 35,868

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

The following discussion and analysis contains forward-looking statements about our plans and expectations of what may happen in
the future. Forward-looking statements are based on a number of assumptions and estimates that are inherently subject to significant risks and
uncertainties, and our results could differ materially from the results anticipated by our forward-looking statements as a result of many known
or  unknown  factors,  including,  but  not  limited  to,  those  factors  discussed  in  “Risk  Factors.”  See  also  the  “Special  Cautionary  Notice
Regarding Forward-Looking Statements” set forth at the beginning of this report.

You should read the following discussion and analysis in conjunction with “Item 8. Financial Statements and Supplementary Data,”

and our consolidated financial statements beginning on page F-1 of this report.

Overview

TG Therapeutics is a fully-integrated, commercial stage biopharmaceutical company focused on the acquisition, development and
commercialization of novel treatments for B-cell malignancies and autoimmune diseases. In addition to an active research pipeline including
five  investigational  medicines  across  these  therapeutic  areas,  we  have  received  accelerated  approval  from  the  U.S.  Food  and  Drug
Administration (FDA) for UKONIQ (umbralisib),  for  the  treatment  of  adult  patients  with  relapsed  or  refractory  marginal  zone  lymphoma
who  have  received  at  least  one  prior  anti-CD20-based  regimen  and  relapsed  or  refractory  follicular  lymphoma  who  have  received  at  least
three prior lines of systemic therapies. Currently, we have two programs in Phase 3 development for the treatment of patients with relapsing
forms of multiple sclerosis (RMS) and patients with chronic lymphocytic leukemia (CLL) and several investigational medicines in Phase 1
clinical  development.  We  also  actively  evaluate  complementary  products,  technologies  and  companies  for  in-licensing,  partnership,
acquisition and/or investment opportunities.

Our research and development expenses consist primarily of expenses related to in-licensing of new product candidates, fees paid to
consultants and outside service providers for clinical and laboratory development, facilities-related and other expenses relating to the design,
development,  manufacture,  testing  and  enhancement  of  our  drug  candidates  and  technologies.  We  expense  our  research  and  development
costs as they are incurred. Research and development expenses for the years ended December 31, 2020, 2019 and 2018 were approximately
$151.9  million,  $148.4  million  and  $153.8  million,  respectively,  excluding  noncash  compensation  expenses  related  to  research  and
development.

The following table sets forth the research and development expenses per project, exclusive of noncash compensation expenses, for

the periods presented.

(in thousands)
Ublituximab
Umbralisib
Early Clinical Pipeline & Pre-Clinical

Total

$

2020
 72,400
 66,495
 13,039
$  151,934

$

2019
 93,302
 46,074
 8,993
$  148,369

2018
$  105,429
 42,852
 5,512
$  153,793

Our general and administrative expenses consist primarily of expenses related to the US launch of UKONIQ, including salaries and
related expenses for our commercialization team and commercial development activities. Other general and administrative expenses consist
of  executive,  finance  and  other  administrative  personnel,  recruitment  expenses,  professional  fees  and  other  corporate  expenses,  including
investor relations, legal activities and facilities-related expenses.

Our  results  of  operations  include  noncash  compensation  expenses  as  a  result  of  the  grants  of  restricted  stock  and  stock  options.
Compensation expense for awards of restricted stock and stock options granted to employees and directors represents the fair value of the
award recorded over the respective vesting periods of the individual awards. The expense is included in the respective categories of expense
in the consolidated statements of operations. We expect to continue to incur significant noncash compensation expenses.

We  recognize  all  share-based  payments  to  employees  and  non-employee  directors  (as  compensation  for  service)  as  noncash
compensation expense in the consolidated financial statements based on the fair values of such payments. Stock-based compensation expense
recognized  each  period  is  based  on  the  value  of  the  portion  of  share-based  payment  awards  that  is  ultimately  expected  to  vest  during  the
period. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those
estimates.

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In  addition,  some  of  the  restricted  stock  and  stock  options  issued  to  employees,  consultants  and  other  third  parties  vest  upon
achievement  of  certain  milestones,  and  accordingly,  the  total  expense  is  uncertain.  Compensation  expense  for  such  awards  is  recognized
when the achievement of such milestones becomes probable.

Our clinical trials will be lengthy and expensive. In addition, we expect losses to continue as we fund in-licensing and development
of new drug candidates. As we further our development efforts, we may enter into additional third-party collaborative agreements and incur
additional  expenses,  such  as  licensing  fees  and  milestone  payments.  In  addition,  we  will  need  to  maintain  and  expand  our  commercial
infrastructure for the manufacturing, marketing and selling of UKONIQ and our drug candidates following approval, if any, by the FDA or a
foreign health authority, which would result in incurring significant additional expenses. As a result, our annual results may fluctuate and a
year-by-year comparison of our operating results may not be a meaningful indication of our future performance.

RESULTS OF OPERATIONS

Years Ended December 31, 2020, 2019 and 2018

(in thousands)

License revenue

Costs and expenses:
Research and development:
Noncash stock expense associated with in-licensing agreements
Noncash compensation
Other research and development
Total research and development

General and administrative:
Noncash compensation
Other general and administrative
Total general and administrative

Total costs and expenses

Operating loss

Other (income) expense, net

Net loss

Years Ended December 31, 2020 and 2019

Years Ended December 31, 
2019

2018

2020

$

 152

$

 152

$

 152

 —  

 13,962
 151,934
 165,896

 100
 5,811
 148,269
 154,180

 66,327
 41,523
 107,850

 5,523
 9,504
 15,027

 4,000
 5,598
 149,793
 159,391

 7,288
 7,873
 15,161

 273,746

 169,207

 174,552

 (273,594)

 (169,055)

 (174,400)

 5,787

 3,816

 (918)

$  (279,381)

$  (172,871)

$  (173,482)

License Revenue. License revenue was approximately $152,000 for each of the years ended December 31, 2020 and 2019. License
revenue is related to the amortization of an upfront payment of $2.0 million associated with our license agreement with Ildong. The upfront
payment from Ildong will be recognized as license revenue on a straight-line basis through December 2025, which represents the estimated
period over which we will have certain ongoing responsibilities under the sublicense agreement.

Noncash Stock Expense Associated with In-Licensing Agreement (Research and Development).  Noncash  stock  expense  associated
with  in-licensing  agreement  (research  and  development)  amounted  to  zero  for  the  year  ended  December  31,  2020,  as  compared  to  $0.1
million during the comparable period in 2019.

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Noncash Compensation Expense (Research and Development). Noncash compensation expense (research and development) related
to equity incentive grants totaled $14.0 million for the year ended December 31, 2020, as compared to $5.8 million during the comparable
period in 2019. The increase in noncash compensation expense was primarily due to an increase in research and development personnel and a
higher stock price during the year ended December 31, 2020.

Other  Research  and  Development  Expenses.  Other  research  and  development  expenses  increased  by  $3.6  million  from  $148.3
million for the year ended December 31, 2019 to $151.9 million for the year ended December 31, 2020. The increase in R&D expense is
primarily  attributable  to  the  achievement  of  various  milestones,  offset  by  a  decrease  in  manufacturing  expense  during  the  year  ended
December 31, 2020. We expect our other research and development costs to remain at consistent levels throughout 2021.

Noncash Compensation Expense (General and Administrative). Noncash compensation expense (general and administrative) related
to  equity  incentive  grants  increased  by  $60.8  million  from  $5.5  million  for  the  year  ended  December  31,  2019  to  $66.3  million  during
the year ended December 31, 2020. The increase in noncash compensation expense was primarily related to more milestone-based vesting of
restricted stock granted to executive personnel during the year ended December 31, 2020.

Other  General  and  Administrative  Expenses.  Other  general  and  administrative  expenses  increased  by  $32.0  million  from  $9.5
million for the year ended December 31, 2019 to $41.5 million for the year ended December 31, 2020. The increase was due primarily to
commercial costs, including personnel, incurred in preparation for the launch of UKONIQ. We expect our other general and administrative
expenses to increase modestly during 2021.

Interest Expense. Interest expense increased by $1.0 million to $6.3 million for the year ended December 31, 2020, as compared to
expense of $5.3 million for year ended December 31, 2019. The increase is mainly due to interest expense related to administrative fees in
connection with contract manufacturing costs during the year ended December 31, 2020.

Other Income. Other income decreased by $1.0 million to $0.5 million for the year ended December 31, 2020, as compared to $1.5
million for the year ended December 31, 2019. The decrease in other income is mainly due to a decrease in interest income during the year
ended December 31, 2020. We expect our other income to remain at a comparable level during 2021.

Years Ended December 31, 2019 and 2018

License Revenue. License revenue was approximately $152,000 for each of the years ended December 31, 2019 and 2018. License
revenue is related to the amortization of an upfront payment of $2.0 million associated with our license agreement with Ildong. The upfront
payment from Ildong will be recognized as license revenue on a straight-line basis through December 2025, which represents the estimated
period over which we will have certain ongoing responsibilities under the sublicense agreement.

Noncash Stock Expense Associated with In-Licensing Agreement (Research and Development). Noncash stock expense associated
with in-licensing agreement (research and development) amounted to $0.1 million for the year ended December 31, 2019, as compared to
$4.0 million during the comparable period in 2018. The expense during the year ended December 31, 2018 was recorded in conjunction with
the 333,868 total shares of common stock issued to Novimmune and Jiangsu Hengrui as upfront payments for the licenses to the CD47/CD19
and BTK programs.

Noncash Compensation Expense (Research and Development). Noncash compensation expense (research and development) related
to  equity  incentive  grants  remained  consistent  between  the  two  periods  totaling  $5.8  million  for  the  year  ended  December  31,  2019,  as
compared to $5.6 million during the comparable period in 2018.

Other  Research  and  Development  Expenses.  Other  research  and  development  expenses  decreased  by  $1.5  million  from  $149.8
million for the year ended December 31, 2018 to $148.3 million for the year ended December 31, 2019. The decrease in R&D expense is
primarily attributable to the winding down of our late-stage clinical development programs during the year ended December 31, 2019.

Noncash Compensation Expense (General and Administrative). Noncash compensation expense (general and administrative) related
to equity incentive grants decreased by $1.8 million from $7.3 million for the year ended December 31, 2018 to $5.5 million during the year
ended December 31, 2019. The decrease in noncash compensation expense was primarily related to more vesting of restricted stock granted
to executive personnel during the year ended December 31, 2018.

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Other General and Administrative Expenses. Other general and administrative expenses increased by $1.6 million from $7.9 million
for the year ended December 31, 2018 to $9.5 million for the year ended December 31, 2019. The increase was due primarily to increased
personnel and other general and administrative costs.

Interest Expense. Interest expense increased by $4.4 million to $5.3 million for the year ended December 31, 2019, as compared to
expense  of  $0.9  million  for  year  ended  December  31,  2018.  The  increase  is  mainly  due  to  the  interest  expense  related  to  the  Hercules
financing agreement.

Other Income. Other income decreased by $0.3 million to $1.5 million for the year ended December 31, 2019, as compared to $1.8
million  for  the  year  ended  December  31,  2018.  The  decrease  in  other  income  is  mainly  due  to  a  greater  change  in  the  fair  value  of  notes
payable during the year ended December 31, 2018.

LIQUIDITY AND CAPITAL RESOURCES

Our major sources of cash have been proceeds from the private placement and public offering of equity securities, and in 2019 from
our loan and security agreement executed with Hercules Capital, Inc. (“Hercules”) (see Note 7 for more information). As of December 31,
2020 we had not yet generated revenue from drug sales of UKONIQ. UKONIQ first became commercially available in the United States in
February of 2021. Even with the commercialization of UKONIQ and the future commercialization of our other drug candidates, we may not
become profitable. Our ability to achieve profitability depends on our ability to generate revenue and many other factors, including our ability
to  obtain  regulatory  approval  for  our  drug  candidates;  successfully  complete  any  post-approval  regulatory  obligations;  and  successfully
commercialize our drug candidates alone or in partnership. We may continue to incur substantial operating losses even if we begin to generate
revenues from our drug candidates.

As of December 31, 2020, we had $605.4 million in cash and cash equivalents, and investment securities. We anticipate that our
cash and cash equivalents, and investment securities as of December 31, 2020 will provide sufficient liquidity for more than a twelve-month
period from the date of filing this Annual Report on Form 10-K. The actual amount of cash that we will need to operate is subject to many
factors,  including,  but  not  limited  to,  the  timing,  design  and  conduct  of  clinical  trials  for  our  drug  candidates.  We  are  dependent  upon
significant future financing to provide the cash necessary to execute our current operations, including the commercialization of any of our
drug candidates.

Cash  used  in  operating  activities  for  the  year  ended  December  31,  2020  was  $214.5  million  as  compared  to  $132.8  million  for
the year ended December 31, 2019. The increase in cash used in operating activities was due primarily to increased expenditures associated
with our clinical development programs for ublituximab and umbralisib.

For the year ended December 31, 2020, net cash used in investing activities was $24.5 million as compared to cash used in investing
activities of $0.7 million for the year ended December 31, 2019. The increase in net cash used in investing activities was primarily due to
greater investment in short-term securities during the year ended December 31, 2020.

For the year ended December 31, 2020, net cash provided by financing activities of $679.8 million related to the net proceeds from

the issuance of common stock as part of our ATM program and public offerings in May 2020 and December 2020.

ATM Program

In December 2014, we filed a shelf registration statement on Form S-3 (the "2015 S-3"), which was declared effective in January
2015. Under the 2015 S-3, the Company may sell up to a total of $250 million of its securities. In connection with the 2015 S-3, we amended
our 2013 At-the-Market Issuance Sales Agreement (the "2015 ATM") with MLV & Co. LLC (“MLV”) such that we were able to issue and
sell additional shares of our common stock, having an aggregate offering price of up to $175.0 million, from time to time through MLV and
FBR  Capital  Markets  &  Co.  ("FBR",  each  of  MLV  and  FBR  individually  an  "Agent"  and  collectively  the  "Agents"),  acting  as  the  sales
agents.  Under  the  2015  ATM,  we  paid  the  Agents  a  commission  rate  of  up  to  3.0%  of  the  gross  proceeds  from  the  sale  of  any  shares  of
common stock sold through the Agents.

During the year ended December 31, 2017, we sold a total of 3,104,253 shares of common stock under the 2015 ATM for aggregate
total gross proceeds of approximately $31.6 million at an average selling price of $10.18 per share, resulting in net proceeds of approximately
$31.0 million after deducting commissions and other transaction costs.

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In  May  2017,  we  filed  a  shelf  registration  statement  on  Form  S-3  (the  "2017  S-3"),  which  was  declared  effective  in  June  2017.
Under  the  2017  S-3,  we  may  sell  up  to  a  total  of  $300  million  of  securities.  In  connection  with  the  2017  S-3,  we  entered  into  an  At-the-
Market Issuance Sales Agreement (the "2017 ATM") with Jefferies LLC, Cantor Fitzgerald & Co., FBR Capital Markets & Co., SunTrust
Robinson Humphrey, Inc., Raymond James & Associates, Inc., Ladenburg Thalmann & Co. Inc. and H.C. Wainwright & Co., LLC (each a
"2017 Agent" and collectively, the "2017 Agents"), relating to the sale of shares of our common stock. Under the 2017 ATM we paid the
2017 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,  we  sold  a  total  of  13,620,165  shares  of  common  stock  under  the  2017  ATM  for
aggregate  total  gross  proceeds  of  approximately  $99.3  million  at  an  average  selling  price  of  $7.29  per  share,  resulting  in  net  proceeds  of
approximately $97.5 million after deducting commissions and other transactions costs.

On September 5, 2019, we filed an automatic “shelf registration” statement on Form S-3 (the “2019 WKSI Shelf”) as a “well-known
seasoned issuer” as defined in Rule 405 under the Securities Act, which registered an unlimited and indeterminate amount of debt or equity
securities for future issuance and sale. The 2019 WKSI Shelf was declared effective in September 2019. In connection with the 2019 WKSI
Shelf, we entered into an At-the-Market Issuance Sales Agreement (the “2020 ATM”) with Jefferies LLC, Cantor Fitzgerald & Co. and B.
Riley Securities, Inc. (each a “2020 Agent” and collectively, the “2020 Agents”), relating to the sale of shares of our common stock. Under
the 2020 ATM, we paid the 2020 Agents a commission rate of up to 3.0% of the gross proceeds from the sale of any shares of common stock.
In November 2020, we entered into an At-the-Market Issuance Sales Agreement (the “2021 ATM”) with the same terms and agents (each a
“2021 Agent” and collectively, the “2021 Agents”) as the 2020 ATM.

During the year ended December 31, 2020, we sold a total of 8,528,286 shares of common stock under the 2020 ATM for aggregate
total  gross  proceeds  of  approximately  $187.5  million  at  an  average  selling  price  of  $21.99  per  share,  resulting  in  net  proceeds  of
approximately $184.2 million after deducting commissions and other transactions costs.

During the year ended December 31, 2020, we sold a total of 804,100 shares of common stock under the 2021 ATM for aggregate
total gross proceeds of approximately $33.9 million at an average selling price of $42.18 per share, resulting in net proceeds of approximately
$33.3 million after deducting commissions and other transactions costs.

The  2019  WKSI  Shelf  is  currently  our  only  active  shelf-registration  statement.  We  may  offer  any  combination  of  the  securities
registered under the 2019 WKSI Shelf from time to time in response to market conditions or other circumstances if we believe such a plan of
financing is in the best interests of our stockholders. We believe that the 2019 WKSI Shelf provides us with the flexibility to raise additional
capital to finance our operations as needed.

Equity Financings

On  March  1,  2019,  we  completed  a  public  offering  of  4,100,000  shares  of  our  common  stock  (plus  a  30-day  underwriter
overallotment option to purchase up to an additional 615,000 shares of common stock, which was exercised) at a price of $5.87 per share.
Proceeds  from  this  offering,  including  the  overallotment,  after  underwriting  discounts  and  offering  expenses  were  approximately  $27.5
million.

On  December  22,  2019,  we  completed  a  securities  purchase  agreement  with  an  institutional  investor  in  which  we  agreed  to  sell

5,434,783 shares of our common stock at a price of $9.20 per share. Net proceeds from this offering were approximately $50.0 million.

In May 2020, we completed an underwritten public offering of 8,500,000 shares of our common stock (plus an underwriter option to
purchase up to an additional 1,275,000 shares of common stock, which was exercised) at a price of $18 per share. Net proceeds from this
offering,  including  the  overallotment,  were  approximately  $165.1  million,  net  of  underwriting  discounts  and  offering  expenses  of
approximately $10.8 million.

On  December  17,  2020,  we  completed  a  public  offering  of  6,320,000  shares  of  our  common  stock  (plus  a  30-day  underwriter
overallotment option to purchase up to an additional 948,000 shares of common stock, which was exercised) at a price of $43.50 per share.
Net proceeds from this offering, including the overallotment, were approximately $297.2 million after underwriting discounts and offering
expenses of approximately $19.0 million.

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Debt Financings

On February 28, 2019 (the “Closing Date”), we entered into a term loan facility of up to $60.0 million (“Term Loan”) with Hercules
Capital, Inc. (“Hercules”), the proceeds of which will be used research and development programs and for general corporate purposes. The
Term Loan is governed by a loan and security agreement, dated February 28, 2019 (the “Loan Agreement”), which provides for up to four
separate  advances.  The  first  advance  of  $30.0  million  was  drawn  on  the  Closing  Date.  Two  additional  advances  of  $10.0  million  may  be
drawn at our option but subject to certain clinical trial milestones, and the fourth advance of $10.0 million, available in minimum increments
of $5.0 million, was available through December 15, 2020 subject to the approval of Hercules’ investment committee.

The Term Loan will mature on March 1, 2022 (the “Loan Maturity Date”). Each advance accrues interest at a per annum rate of
interest equal to the greater of either (i) the “prime rate” as reported in The Wall Street Journal plus 4.75%, or (ii) 10.25%. The Term Loan
provides  for  interest-only  payments  until  October  1,  2020.  The  interest-only  period  may  be  extended  to  April  1,  2021  if  on  or  before
September 30, 2020, we achieve either the third milestone or we have raised at least $150.0 million in unrestricted net cash proceeds from
one or more equity financings, subordinated indebtedness and/or upfront proceeds from business development transactions permitted under
the  Loan  Agreement,  in  each  case  after  February  7,  2019,  and  prior  to  September  30,  2020  (“Milestone  IV”).  Thereafter,  amortization
payments will be payable monthly in eighteen installments (or, if the period requiring interest-only payments has been extended to April 1,
2021, in twelve installments) of principal and interest (subject to recalculation upon a change in prime rates). As a result of the Company
having raised in excess of $150 million before the required timeline in the Loan Agreement, the interest-only period has been extended to
April 1, 2021. At our option upon seven business days’ prior written notice to Hercules, we may prepay all or any portion greater than or
equal to $5.0 million of the outstanding advances by paying the entire principal balance (or portion thereof), all accrued and unpaid interest,
subject to a prepayment charge of 3.0%, if such advance is prepaid in any of the first twelve months following the Closing Date; 1.5%, if
such advance is prepaid after twelve months following the Closing Date but on or prior to twenty-four months following the Closing Date;
and 0% thereafter. In addition, a final payment equal to 3.5% of the aggregate principal amount of the loan extended by Hercules is due on
the maturity date. Amounts outstanding during an event of default shall be payable on demand and accrue interest at an additional rate of
4.0% per annum of the past due amount outstanding.

The  Term  Loan  is  secured  by  a  lien  on  substantially  all  of  our  assets,  other  than  intellectual  property,  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.

The events of default under the Loan Agreement include, without limitation, and subject to customary grace periods, (1) our failure
to make any payments of principal or interest under the Loan Agreement, promissory notes or other loan documents, (2) our breach or default
in  the  performance  of  any  covenant  under  the  Loan  Agreement,  (3)  the  occurrence  of  a  material  adverse  effect,  (4)  a  false  or  misleading
representation or warranty in any material respect, (5) our insolvency or bankruptcy, (6) certain attachments or judgments on the Borrower’s
assets, or (7) the occurrence of any material default under certain agreements or obligations involving indebtedness in excess of $750,000. If
an event of default occurs, Hercules is entitled to take enforcement action, including acceleration of amounts due under the Loan Agreement.

The  Loan  Agreement  also  contains  warrant  coverage  of  2%  of  the  total  amount  funded.  A  warrant  (the  “Hercules  Warrant”)  was
issued  to  Hercules  to  purchase  147,058  shares  of  common  stock  with  an  exercise  price  of  $4.08.  The  Hercules  Warrant  is  exercisable  for
seven years from the date of issuance. Hercules may exercise the Hercules Warrant either by (a) cash or check or (b) through a net issuance
conversion. The shares will be registered and freely tradeable within six months of issuance. We accounted for the Hercules Warrant as an
equity instrument since it was indexed to our common shares and met the criteria for classification in shareholders’ equity. The relative fair
value  of  the  Hercules  Warrant  on  the  date  of  issuance  was  approximately  $1.0  million  and  was  recorded  as  debt  issuance  costs  and  as  an
offset to the Term Loan. This amount will be amortized to interest expense using the straight-line method, which approximates the effective
interest method, over the life of the Term Loan.

Contract Manufacturer

In 2018, we entered into an agreement with a contract manufacturer for the clinical and potential commercial supply of one of our
product candidates. As part of this agreement, the contract manufacturer has agreed to defer payment of certain costs and expenses under the
agreement  in  exchange  for  the  payment  of  an  administrative  fee.  To  date  we  have  incurred  expenses  related  to  this  agreement  of
approximately $53.7 million as of December 31, 2020, which include service fees, raw material costs and administrative fees. We have made
payments of $37.4 million to the contract manufacturer as of December 31, 2020. Accordingly, as of December 31, 2020, $15.7 million is

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included in current liabilities in the Company’s consolidated balance sheet, of which $4.2 million is due in the first quarter of 2021.  We will
incur an administrative fee of six percent (6%) per year starting from the date of invoice issuance. For the years ended December 31, 2020,
2019  and  2018,  we  have  accrued  $1.2  million,  $1.2  million  and  zero,  respectively,  in  administrative  fees  in  connection  with  these  costs,
which has been included in interest expense in the Company’s consolidated statements of operations.

Leases

In  October  2014,  we  entered  into  an  agreement  (the  “Office  Agreement”)  with  Fortress  Biotech,  Inc.  (“FBIO”)  to  occupy
approximately 45% of the 24,000 square feet of New York City office space leased by FBIO. The Office Agreement requires us to pay our
respective share of the average annual rent and other costs of the 15-year lease. We approximate an average annual rental obligation of $1.4
million under the Office Agreement. We began to occupy this new space in April 2016, with rental payments beginning in the third quarter of
2016. At January 1, 2020, we recognized a lease liability and corresponding right of use (“ROU”) asset based on the present value of the
remaining  lease  payments  for  all  of  our  leased  office  spaces,  the  majority  of  which  is  comprised  of  our  New  York  City  office  space.  The
present values of our lease liability and corresponding ROU asset are $12.1 million and $9.3 million, respectively, as of December 31, 2020.
Our leases have remaining lease terms of 4 months to 11 years. One lease has a renewal option to extend the lease for an additional term of
two years.

Under the Office Agreement, we agreed to pay FBIO our portion of the build-out costs, which have been allocated to us at the 45%
rate mentioned above. The allocated build-out costs have been recorded in Leasehold Interest, net on the Company’s consolidated balance
sheets and will be amortized over the 15-year term of the Office Agreement. The initial commitment period of the 45% rate was for a period
of three (3) years. We and FBIO currently determine actual office space utilization annually and if our utilization differs from the amount we
have been billed, we will either receive credits or be assessed incremental utilization charges. As of December 31, 2020, the allocation rate is
65% and will be evaluated again in August 2021 for the following rent year. Also, in connection with this lease, in October 2014 we pledged
$0.6  million  to  secure  a  line  of  credit  as  a  security  deposit  for  the  Office  Agreement,  which  has  been  recorded  as  restricted  cash  in  the
accompanying consolidated balance sheets. Additional collateral of $0.6 million was pledged in April 2018 to increase the letter of credit for
the office space.

In October 2019, we finalized a five-year lease for office space in New Jersey (the “NJ Lease”). We approximate an average annual
rental obligation of $0.3 million under the NJ Lease. We took possession of this space in October 2019, with rental payments beginning in
November 2019.

Total rental expense was approximately $2.7 million, $2.7 million and $1.4 million for the years ended December 31, 2020, 2019

and 2018, respectively.

Future  minimum  lease  commitments  as  of  December  31,  2020  total,  in  the  aggregate,  approximately  $19.5  million  through
December  31,  2031.  Our  future  minimum  lease  commitments  include  our  office  leases  in  New  York,  New  Jersey,  North  Carolina  and
Tennessee as of December 31, 2020.

OFF-BALANCE SHEET ARRANGEMENTS

We have not entered into any transactions with unconsolidated entities whereby we have financial guarantees, subordinated retained
interests,  derivative  instruments  or  other  contingent  arrangements  that  expose  us  to  material  continuing  risks,  contingent  liabilities,  or  any
other  obligations  under  a  variable  interest  in  an  unconsolidated  entity  that  provides  us  with  financing,  liquidity,  market  risk  or  credit  risk
support.

CRITICAL ACCOUNTING POLICIES AND SIGNIFICANT JUDGMENTS AND ESTIMATES

The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements,
which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these financial statements
requires  us  to  make  estimates  and  judgments  that  affect  the  reported  amount  of  assets  and  liabilities  and  related  disclosure  of  contingent
assets and liabilities at the date of our financial statements and the reported amounts of revenues and expenses during the applicable period.
Actual results may differ from these estimates under different assumptions or conditions.

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We  define  critical  accounting  policies  as  those  that  are  reflective  of  significant  judgments  and  uncertainties  and  which  may
potentially result in materially different results under different assumptions and conditions. In applying these critical accounting policies, our
management uses its judgment to determine the appropriate assumptions to be used in making certain estimates. These estimates are subject
to an inherent degree of uncertainty. Our critical accounting policies include the following:

Stock Compensation. We have granted stock options and restricted stock to employees, directors and consultants, as well as warrants
to other third parties. For employee, director and consultant grants the value of each option award is estimated on the date of grant using the
Black-Scholes option-pricing model. The Black-Scholes model takes into account volatility in the price of our stock, the risk-free interest
rate, the estimated life of the option, the closing market price of our stock and the exercise price. We base our estimates of our stock price
volatility  on  the  historical  volatility  of  our  common  stock  and  our  assessment  of  future  volatility;  however,  these  estimates  are  neither
predictive nor indicative of the future performance of our stock. For purposes of the calculation, we assumed that no dividends would be paid
during  the  life  of  the  options  and  warrants.  The  estimates  utilized  in  the  Black-Scholes  calculation  involve  inherent  uncertainties  and  the
application of management judgment. In addition, because some of the options, restricted stock and warrants issued to employees, consultants
and other third parties vest upon the achievement of certain milestones, the total expense is uncertain. Compensation expense for such awards
that vest upon the achievement of milestones is recognized when the achievement of such milestone becomes probable.

Accrued  Research  and  Development  Expenses.  As  part  of  the  process  of  preparing  our  financial  statements,  we  are  required  to
estimate our accrued expenses. This process involves reviewing open contracts, communicating with our personnel to identify services that
have been performed on our behalf and estimating the level of service performed and the associated cost incurred for the service when we
have not yet been invoiced or otherwise notified of the actual cost. The majority of our service providers invoice us monthly for services
performed or when contractual milestones are met. We make estimates of our accrued expenses as of each balance sheet date in our financial
statements based on facts and circumstances known to us at that time. We periodically confirm the accuracy of our estimates with the service
providers and make adjustments, if necessary. Examples of estimated accrued research and development expenses include:

● fees paid to contract research organizations (CROs) in connection with clinical studies;
● fees paid to contract manufacturing organizations (CMOs);
● fees paid to trial sites in connection with clinical studies; and
● fees paid to vendors associated with licenses/milestones.

We base our expenses related to clinical studies on our estimates of the services received and efforts expended pursuant to contracts
with multiple CROs that conduct and manage clinical studies on our behalf. The financial terms of these agreements are subject to an initial
negotiation, vary from contract to contract and may result in uneven payment flows. There may be instances in which payments made to our
vendors will exceed the level of services provided and result in a prepayment of the clinical expense. Payments under some of these contracts
depend  on  factors  such  as  the  successful  enrollment  of  patients  and  the  completion  of  clinical  trial  milestones.  In  accruing  certain  service
fees, we estimate the time period over which services will be performed, enrollment of patients, number of sites activated and the level of
effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from our estimate, we
adjust the accrual or prepaid accordingly. Although we do not expect our estimates to be materially different from amounts actually incurred,
our understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and
may result in us reporting amounts that are too high or too low in any particular period.

RECENTLY ISSUED ACCOUNTING STANDARDS

In  July  2018,  the  FASB  issued  Accounting  Standards  Update  (“ASU”)  No.  2018-11,  “Leases  -  Targeted  Improvements”  (“ASU
2018-11”) as an update to ASU 2016-02, Leases (“ASU 2016-02” or “Topic 842”) issued on February 25, 2016. ASU 2016-02 is effective for
public business entities for fiscal years beginning January 1, 2019. ASU 2016-02 required companies to adopt the new leases standard at the
beginning  of  the  earliest  period  presented  in  the  financial  statements,  which  is  January  1,  2017,  using  a  modified  retrospective  transition
method where lessees must recognize lease assets and liabilities for all leases even though those leases may have expired before the effective
date of January 1, 2017. Lessees must also provide the new and enhanced disclosures for each period presented, including the comparative
periods.

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ASU 2018-11 provides an entity with an additional (and optional) transition method to adopt the new leases standard. Under this
new transition method, an entity initially applies the new lease standard at the adoption date and recognizes a cumulative-effect adjustment to
the opening balance of retained earnings in the period of adoption. Consequently, an entity’s reporting for the comparative periods presented
in the financial statements in which it adopts the new lease standard will continue to be in accordance with ASC 840, Leases (“ASC 840”).
An  entity  that  elects  this  additional  (and  optional)  transition  method  must  provide  the  required  ASC  840  disclosures  for  all  periods  that
continue to be in accordance with ASC 840. The amendments do not change the existing disclosure requirements in ASC 840.

ASU 2018-11 is effective for public business entities for fiscal years beginning after December 15, 2018, and interim periods within
those fiscal years, with earlier adoption permitted. The Company adopted ASU 2018-11 on January 1, 2019 using a modified retrospective
method  and  will  not  restate  comparative  periods.  We  elected  the  package  of  practical  expedients  permitted  under  the  transition  guidance,
which  allows  us  to  carryforward  our  historical  lease  classification  and  our  assessment  on  whether  a  contract  is  or  contains  a  lease.  The
adoption of this guidance resulted in the addition of material balances of ROU assets and lease liabilities to our consolidated balance sheets at
January 1, 2019, primarily relating to our lease of office space (see Note 8). The impact to our consolidated statements of operations was not
material as a result of this standard.

In  June  2018,  the  FASB  issued  ASU  No.  2018-07,  “Improvements  to  Nonemployee  Share-Based  Payment  Accounting”  (“ASU
2018-07”). ASU 2018-07 expands the scope of FASB Topic 718, Compensation – Stock Compensation (“Topic 718”) to include share-based
payment  transactions  for  acquiring  goods  and  services  from  nonemployees.  An  entity  should  only  remeasure  equity-classified  awards  for
which a measurement date has not been established through a cumulative-effect adjustment to retained earnings as of the beginning of the
fiscal year of adoption. Upon transition, the entity is required to measure these nonemployee awards at fair value as of the adoption date. The
entity  must  not  remeasure  assets  that  are  completed.  Disclosures  required  at  transition  include  the  nature  of  and  reason  for  the  change  in
accounting  principle  and,  if  applicable,  quantitative  information  about  the  cumulative  effect  of  the  change  on  retained  earnings  or  other
components of equity.

ASU 2018-07 is effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods
within that fiscal year. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. The Company adopted ASU
2018-07  on  January  1,  2019.  The  adoption  of  ASU  2018-07  did  not  have  a  material  effect  on  our  consolidated  financial  statements  as  of
January  1,  2019.  The  adoption  of  ASU  2018-07  had  no  impact  on  nonemployee  performance  awards  as  they  are  measured  based  on  the
outcome that is probable.

Other pronouncements issued by the FASB or other authoritative accounting standards group with future effective dates are either

not applicable or not significant to our consolidated financial statements.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK.

The  primary  objective  of  our  investment  activities  is  to  preserve  principal  while  maximizing  our  income  from  investments  and
minimizing  our  market  risk.  We  currently  invest  in  government  and  investment-grade  corporate  debt  in  accordance  with  our  investment
policy, which we may change from time to time. The securities in which we invest have market risk. This means that a change in prevailing
interest rates, and/or credit risk, may cause the fair value of the investment to fluctuate. For example, if we hold a security that was issued
with a fixed interest rate at the then-prevailing rate and the prevailing interest rate later rises, the fair value of our investment will probably
decline.  As  of  December  31,  2020,  our  portfolio  of  financial  instruments  consists  of  cash  equivalents  and  short-term  interest-bearing
securities, including government debt and money market funds. The average duration of all of our held-to-maturity investments held as of
December 31, 2020, was less than 12 months. Due to the relatively short-term nature of these financial instruments, we believe there is no
material exposure to interest rate risk, and/or credit risk, arising from our portfolio of financial instruments.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

Our consolidated financial statements and the notes thereto, included in Part IV, Item 15(a), part 1, are incorporated by reference into

this Item 8.

ITEM  9.  CHANGES  IN  AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND  FINANCIAL
DISCLOSURES.

Not applicable.

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ITEM 9A. CONTROLS AND PROCEDURES.

Evaluation  of  Disclosure  Controls  and  Procedures.  As  of  December  31,  2020,  management  carried  out  an  evaluation,  under  the
supervision and with the participation of our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and
operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as
amended (the “Exchange Act”)). Our disclosure controls and procedures are designed to provide reasonable assurance that information we
are required to disclose in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within
the  time  periods  specified  in  applicable  rules  and  forms.  Based  upon  that  evaluation,  our  Chief  Executive  and  Chief  Financial  Officers
concluded that, as of December 31, 2020, our disclosure controls and procedures were effective.

Management’s  Annual  Report  on  Internal  Control  over  Financial  Reporting.  Our  management  is  responsible  for  establishing  and
maintaining adequate internal control over financial reporting (as defined in Rule 13a-15(f) or Rule 15d-15(f) under the Exchange Act). Our
management assessed the effectiveness of our internal control over financial reporting as of December 31, 2020. In making this assessment,
our  management  used  the  criteria  established  in  Internal  Control  –  Integrated  Framework  (2013)  issued  by  the  Committee  of  Sponsoring
Organizations  of  the  Treadway  Commission,  or  COSO  Framework.  Our  management  has  concluded  that,  as  of  December  31,  2020,  our
internal control over financial reporting was effective based on these criteria.

The effectiveness of our internal control over financial reporting as of December 31, 2020 was audited by CohnReznick LLP, our
independent  registered  public  accounting  firm,  as  stated  in  their  report  appearing  below,  which  expressed  an  unqualified  opinion  on  the
effectiveness of our internal control over financial reporting as of December 31, 2020.

Changes  in  Internal  Control  Over  Financial  Reporting.  There  were  no  changes  in  our  internal  control  over  financial  reporting
during the quarter ended December 31, 2020 that have materially affected, or are reasonably likely to materially affect, our internal control
over financial reporting.

Limitations on the Effectiveness of Controls. Our management, including our Chief Executive Officer and Chief Financial Officer,
does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent all errors and all fraud.
A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the
control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of
controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can
provide absolute assurance that all control issues and instances of fraud, if any, within our Company have been detected.

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Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders
TG Therapeutics, Inc.

Opinion on Internal Control over Financial Reporting

We have audited TG Therapeutics, Inc. and subsidiaries (the “Company’s”) internal control over financial reporting as of December
31,  2020,  based  on  criteria  established  in  Internal  Control—Integrated  Framework  (2013)  issued  by  the  Committee  of  Sponsoring
Organizations  of  the  Treadway  Commission  (COSO).  In  our  opinion,  the  Company  maintained,  in  all  material  respects,  effective  internal
control over financial reporting as of December 31, 2020, based on criteria established in Internal Control—Integrated Framework (2013)
issued by COSO.

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board  (United  States)
(PCAOB), the consolidated balance sheets and the related consolidated statements of operations, stockholders’ equity and cash flows of the
Company as of December 31, 2020 and 2019 and for each of the three years in the period ended December 31, 2020 and our report dated
March 1, 2021, expressed an unqualified opinion.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment
of  the  effectiveness  of  internal  control  over  financial  reporting  included  in  the  accompanying  Management’s  Annual  Report  on  Internal
Control  Over  Financial  Reporting.  Our  responsibility  is  to  express  an  opinion  on  the  Company’s  internal  control  over  financial  reporting
based  on  our  audit.  We  are  a  public  accounting  firm  registered  with  the  PCAOB  and  are  required  to  be  independent  with  respect  to  the
Company  in  accordance  with  the  U.S.  federal  securities  laws  and  the  applicable  rules  and  regulations  of  the  Securities  and  Exchange
Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit
to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our
audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the
risk  that  a  material  weakness  exists,  and  testing  and  evaluating  the  design  and  operating  effectiveness  of  internal  control  based  on  the
assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our
audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability
of  financial  reporting  and  the  preparation  of  financial  statements  for  external  purposes  in  accordance  with  generally  accepted  accounting
principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of
records  that,  in  reasonable  detail,  accurately  and  fairly  reflect  the  transactions  and  dispositions  of  the  assets  of  the  company;  (2)  provide
reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally
accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of
management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized
acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements.  Also,
projections  of  any  evaluation  of  effectiveness  to  future  periods  are  subject  to  the  risk  that  controls  may  become  inadequate  because  of
changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ CohnReznick LLP

We have served as the Company’s auditor since 2003.

New York, New York

March 1, 2021

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ITEM 9B. OTHER INFORMATION.

None.

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE.

The information required by this Item is incorporated herein by reference from our Proxy Statement for our 2021 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 2021 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 2021 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 2021 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 2021 Annual Meeting of

Stockholders.

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PART IV

ITEM 15. EXHIBITS and FINANCIAL STATEMENT SCHEDULES.

1.      Consolidated Financial Statements

The following consolidated financial statements of TG Therapeutics, Inc. are filed as part of this report.

Contents
Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets as of December 31, 2020 and 2019

Consolidated Statements of Operations for the years ended December 31, 2020, 2019 and 2018

Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2020, 2019 and 2018

Consolidated Statements of Cash Flows for the years ended December 31, 2020, 2019 and 2018

Notes to Consolidated Financial Statements

2.      Consolidated Financial Statement Schedules

Page
F-1

F-2

F-3

F-4

F-5

F-6

All schedules are omitted as the information required is inapplicable or the information is presented in the consolidated financial

statements or the related notes.

3.     Exhibits

Exhibit
Number

Exhibit Description

3.1

3.2

3.3

4.1

4.4

4.5

10.1

10.2

Amended and Restated Certificate of Incorporation of TG Therapeutics, Inc. dated April 26, 2012 (incorporated by reference to
Exhibit 3.1 to the Registrant’s Form 10-Q for the quarter ended June 30, 2012).

Certificate of Amendment to Amended and Restated Certificate of Incorporation of TG Therapeutics, Inc. dated June 9, 2014
(incorporated by reference to Exhibit 3.2 to the Registrant’s Form 10-Q for the quarter ended June 30, 2014).

Amended and Restated Bylaws of TG Therapeutics, Inc. dated July 18, 2014 (incorporated by reference to Exhibit 3.1 to the
Registrant’s Current Report on Form 8-K filed on July 21, 2014).

Specimen common stock certificate (incorporated by reference to Exhibit 4.1 to the Registrant’s Form 10-K for the year ended
December 31, 2011).

Stockholder Protection Rights Agreement, dated July 18, 2014 between TG Therapeutics, Inc. and American Stock Transfer &
Trust Company, LLC, as Rights Agent (incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K
filed on July 21, 2014).

Description of Securities of TG Therapeutics, Inc. #

Employment Agreement, effective December 29, 2011, between the Registrant and Michael Weiss (incorporated by reference to
Exhibit 10.30 to the Registrant’s Form 10-K for the fiscal year ended December 31, 2011). †

Restricted  Stock  Subscription  Agreement,  effective  December  29,  2011,  between  the  Registrant  and  Michael  Weiss
(incorporated by reference to Exhibit 10.31 to the Registrant’s Form 10-K for the fiscal year ended December 31, 2011). †

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10.3

10.4

10.5

10.6

10.7

10.8

10.9

10.10

10.11

10.12

10.13

10.14

10.15

10.16

10.17

Amendment to Restricted Stock Agreement, dated July 12, 2013, by and between TG Therapeutics, Inc. and Michael S. Weiss
(incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on July 16, 2013). †

Amendment to Restricted Stock Agreements, dated December 31, 2014, by and between TG Therapeutics, Inc. and Michael S.
Weiss (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on January 7, 2015). †

Employment Agreement, effective December 29, 2011, between the Registrant and Sean Power (incorporated by reference to
Exhibit 10.32 to the Registrant’s Form 10-K for the fiscal year ended December 31, 2011). †

Restricted Stock Subscription Agreement, effective December 29, 2011 between the Registrant and Sean Power (incorporated
by reference to Exhibit 10.33 to the Registrant’s Form 10-K for the fiscal year ended December 31, 2011). †

Amendment  to  Restricted  Stock  Agreement,  dated  July  12,  2013,  by  and  between  TG  Therapeutics,  Inc.  and  Sean  A.  Power
(incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on July 16, 2013). †

Amendment  to  Restricted  Stock  Agreements,  dated  December  31,  2014,  by  and  between  TG  Therapeutics,  Inc.  and  Sean  A.
Power (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on January 7, 2015). †

License  Agreement,  dated  January  30,  2012,  by  and  among  the  Registrant,  GTC  Biotherapeutics,  Inc.,  LFB  Biotechnologies
S.A.S. and LFB/GTC LLC (incorporated by reference to Exhibit 10.35 to the Registrant’s Form 10-K for the fiscal year ended
December 31, 2011). *

TG Therapeutics, Inc. Amended and Restated 2012 Incentive Plan, dated May 14, 2012 (incorporated by reference to Exhibit
10.1 to the Registrant’s Form 10-Q/A for the quarter ended March 31, 2012). †

First Amendment to TG Therapeutics, Inc. Amended and Restated 2012 Incentive Plan, filed with the Registrant’s Definitive
Proxy Statement for the Annual Meeting of Stockholders on June 4, 2015, filed on April 24, 2015, and incorporated herein by
reference. †

Second Amendment to TG Therapeutics, Inc. Amended and Restated 2012 Incentive Plan (incorporated by reference to Exhibit
10.1 to the Registrant’s Current Report on Form 8-K filed on June 24, 2020). †

Sublicense  Agreement  between  TG  Therapeutics,  Inc.  and  Ildong  Pharmaceutical  Co.  Ltd.,  dated  November  13,  2012
(incorporated by reference to Exhibit 10.37 to the Registrant’s Form 10-K for the fiscal year ended December 31, 2012). *

License Agreement between TG Therapeutics, Inc. and Ligand Pharmaceuticals Incorporated, dated June 23, 2014 (incorporated
by reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended June 30, 2014).*

License Agreement between TG Therapeutics, Inc. and Rhizen Pharmaceuticals SA, dated September 22, 2014 (incorporated by
reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on January 20, 2015). *

Collaboration Agreement between TG Therapeutics, Inc. and Checkpoint Therapeutics, Inc., dated March 3, 2015 (incorporated
by reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended March 31, 2015). *

Sublicense Agreement between TG Therapeutics, Inc. and Checkpoint Therapeutics, Inc., dated May 27, 2016, (incorporated by
reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended June 30, 2016). *

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10.18

10.19

10.20

10.21

10.22

10.23

10.24

10.25

10.26

21.1

23.1

31.1

31.2

32.1

32.2

101

Amendment  to  Employment  Agreement,  effective  January  1,  2017,  between  TG  Therapeutics,  Inc.  and  Michael  S.  Weiss
(incorporated by reference to Exhibit 10.18 to the Registrant’s Form 10-K/A for the year ended December 31, 2016). †

Advisory Agreement, effective January 1, 2017, between TG Therapeutics, Inc. and Caribe BioAdvisors, LLC (incorporated by
reference to Exhibit 10.19 to the Registrant’s Form 10-K/A for the year ended December 31, 2016).

License Agreement between TG Therapeutics, Inc. and Jiangsu Hengrui Medicine Co., dated January 8, 2018 (incorporated by
reference to Exhibit 10.20 to the Registrant’s Form 10-K for the year ended December 31, 2017). *

Joint Venture and License Option Agreement by and between TG Therapeutics, Inc. and Novimmune S.A., dated June 18, 2018
(incorporated by reference to Exhibit 10.20 to the Registrant’s Form 10-Q for the quarter ended June 30, 2018). *

Master  Services  Agreement  between  Samsung  Biologics  Co.,  Ltd.  and  TG  Therapeutics,  Inc.,  effective  February  21,  2018
(incorporated by reference to the Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended June 30, 2019). *

Loan and Security Agreement, dated February 28, 2019, by and among TG Therapeutics, Inc., TG Biologics, Inc. and Hercules
Capital, Inc. (incorporated by reference to the Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on March 5,
2019).

Warrant Agreement, dated February 28, 2019, by and between TG Therapeutics, Inc. and Hercules Capital, Inc. (incorporated by
reference to the Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed on March 5, 2019).

Warrant  Agreement,  dated  February  28,  2019,  by  and  between  TG  Therapeutics,  Inc.  and  Hercules  Technology  III,  L.P.
(incorporated by reference to the Exhibit 10.4 to the Registrant’s Current Report on Form 8-K filed on March 5, 2019).

Amended  and  Restated  Collaboration  Agreement  by  and  between  TG  Therapeutics,  Inc.  and  Checkpoint  Therapeutics,  Inc.,
dated  June  19,  2019  (incorporated  by  reference  to  Exhibit  10.1  to  the  Registrant’s  Form  10-Q  for  the  quarter  ended  June  30,
2019). *

Subsidiaries of TG Therapeutics, Inc. #

Consent of Independent Registered Public Accounting Firm #

Certification of Principal Executive Officer #

Certification of Principal Financial Officer #

Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 #

Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 #

The following financial information from TG Therapeutics, Inc.’s Annual Report on Form 10-K for the year ended December
31,  2020,  formatted  in  iXBRL  (Inline  eXtensible  Business  Reporting  Language):  (i)  Consolidated  Balance  Sheets,  (ii)
Consolidated Statements of Operations, (iii) Consolidated Statements of Stockholders’ Equity, (iv) Consolidated Statements of
Cash Flows, (v) the Notes to Consolidated Financial Statements.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

Filed Herewith.
Indicates management contract or compensatory plan or arrangement.

#
†
* Certain portions of this exhibit have been omitted pursuant to Item 601(b)(10) of Regulation S-K.

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TG Therapeutics, Inc.

Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets as of December 31, 2020 and 2019

Consolidated Statements of Operations for the years ended December 31, 2020, 2019 and 2018

Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2020, 2019 and 2018

Consolidated Statements of Cash Flows for the years ended December 31, 2020, 2019 and 2018

Notes to Consolidated Financial Statements

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Page
F-1

F-2

F-3

F-4

F-5

F-6

    
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Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders
TG Therapeutics, Inc.

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of TG Therapeutics, Inc. and subsidiaries (the “Company”) as of
December 31, 2020 and  2019, and the related consolidated statements of operations, stockholders’ equity and cash flows for each of the three
years in the period ended December 31, 2020, and the related notes (collectively referred to as the consolidated financial statements). In our
opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December
31, 2020 and  2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020, in
conformity with accounting principles generally accepted in the United States of America.

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board  (United  States)
(PCAOB), the Company’s internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control
—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), and our report
dated March 1, 2021, expressed an unqualified opinion.

Basis for Opinion

These  consolidated  financial  statements  are  the  responsibility  of  the  Company’s  management.  Our  responsibility  is  to  express  an
opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB
and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules
and regulations of the Securities and Exchange Commission and the PCAOB.

We  conducted  our  audits  in  accordance  with  the  standards  of  the  PCAOB.  Those  standards  require  that  we  plan  and  perform  the
audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to
error  or  fraud.  Our  audits  included  performing  procedures  to  assess  the  risks  of  material  misstatement  of  the  consolidated  financial
statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a
test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the
accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated
financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

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

/s/ CohnReznick LLP

We have served as the Company’s auditor since 2003.

New York, New York

March 1, 2021

F-1

Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Consolidated Balance Sheets as of December 31
(in thousands, except share and per share amounts)

Assets
Current assets:

Cash and cash equivalents
Short-term investment securities
Prepaid research and development
Other current assets

Total current assets

Restricted cash
Leasehold interest, net
Equipment, net
Right of use assets
Goodwill

Total assets

Liabilities and stockholders’ equity
Current liabilities:

Accounts payable and accrued expenses
Other current liabilities
Loan payable – current portion
Lease liability – current portion
Accrued compensation

Total current liabilities
Deferred revenue, net of current portion
Long-term debt
Lease liability – non-current
Total liabilities

Commitments and contingencies
Stockholders’ equity:

Preferred stock, $0.001 par value per share (10,000,000 shares authorized, none issued and
outstanding as of December 31, 2020 and December 31, 2019)
Common stock, $0.001 par value per share (150,000,000 shares authorized, 140,617,606 and
109,425,243 shares issued, 140,576,297 and 109,383,934 shares outstanding at December 31, 2020
and December 31, 2019, respectively)
Additional paid-in capital
Treasury stock, at cost, 41,309 shares at December 31, 2020 and December 31, 2019
Accumulated deficit

Total stockholders’ equity
Total liabilities and stockholders’ equity

$

$

$

2020

2019

$

$

$

553,439
51,987
5,231
1,083
611,740
1,259
2,051
481
9,312
799
625,642

37,014
18,236
22,179
1,669
8,456
87,554
610
7,716
10,412
106,292

112,637
27,798
8,105
611
149,151
1,251
2,129
282
9,402
799
163,014

30,041
48,994
—
1,616
3,798
84,449
762
28,970
10,218
124,399

—  

—

141
1,500,040
(234)
(980,597)
519,350
625,642

$

$

109
739,956
(234)
(701,216)
38,615
163,014

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

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Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Consolidated Statements of Operations for the Years Ended December 31
(in thousands, except share and per share amounts)

License revenue

Costs and expenses:
Research and development:

Noncash stock expense associated with in-licensing agreements
Noncash compensation
Other research and development

Total research and development

General and administrative:
Noncash compensation
Other general and administrative

Total general and administrative

Total costs and expenses

Operating loss

Other expense (income):

Interest expense
Other income

Total other expense (income), net

Net loss

Basic and diluted net loss per common share

2020

2019

2018

$

152

$

152

$

152

—  

13,962
151,934
165,896

100
5,811
148,269
154,180

66,327
41,523
107,850

5,523
9,504
15,027

4,000
5,598
149,793
159,391

7,288
7,873
15,161

273,746

169,207

174,552

(273,594)

(169,055)

(174,400)

6,329
(542)
5,787

5,287
(1,471)
3,816

877
(1,795)
(918)

$

$

(279,381) $

(172,871) $

(173,482)

(2.42) $

(1.96) $

(2.30)

Weighted-average shares used in computing basic and diluted net loss per common share

  115,333,693

  88,368,844

  75,466,813

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

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Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Consolidated Statements of Stockholders’ Equity for the Years Ended December 31
(in thousands, except share amounts)

Balance at January 1, 2018
Issuance of restricted stock
Forfeiture of restricted stock
Issuance of common stock in At-the-Market offerings (net of offering costs of
$2.0 million)
Compensation in respect of restricted stock granted to employees, directors and
consultants
Shares issued in connection with in-licensing agreements
Net loss
Balance at December 31, 2018
Issuance of restricted stock
Warrants issued with debt financing
Forfeiture of restricted stock
Issuance of common stock in offerings (net of offering costs of $0.2 million)
Issuance of common stock in At-the-Market offerings (net of offering costs of
$2.0 million)
Compensation in respect of restricted stock granted to employees, directors and
consultants
Shares issued in connection with in-licensing agreements
Net loss
Balance at December 31, 2019
Issuance of common stock in connection with exercise of options
Issuance of restricted stock
Forfeiture of restricted stock
Issuance of common stock in offerings (net of offering costs of $29.9 million)
Issuance of common stock in At-the-Market offerings (net of offering costs of
$4.0 million)
Compensation in respect of restricted stock granted to employees, directors and
consultants
Net loss
Balance at December 31, 2020

* Amount less than one thousand dollars.

Common Stock

Amount

     Additional

paid-in
 capital

Treasury Stock  

Shares

Amount 

$

Shares
73,181,750
1,562,211
(191,196)

9,025,222

—  

333,868

—  

83,911,855
1,851,520
—
(116,463)
10,149,783

13,620,165

—  

8,383

—  

109,425,243
35,814
4,909,829
(128,666)
17,043,000

$

73
2
*

9

—  

*

—  
84
1
—
*
10

422,017
(2)
*

113,630

12,886
4,000
—
552,531
(1)
993
*
77,465

14

97,533

—  

*

—  
109
*
5
*
17

11,335
100
—
739,956
146
(5)
—
462,212

41,309

$
—  
—  

—  

—  
—
—  

41,309

—  
—
—  
—

—  

—  
—  
—  

Accumulated
Deficit
(354,863)

$
—  
—  

Total

66,993
—
—

(234)

$
—  
—  

—  

—  

113,639

—  
—
—  

(234)

—  

—  
—
(173,482)
(528,345)

—  

12,886
4,000
(173,482)
24,036
—
993
—
77,475

—  
—

—  

97,547

—  
—  

(172,871)
(701,216)

—  
—  
—

11,335
100
(172,871)
38,615
146
—
—
462,229

—  

217,452

—  
—

—  

—  
—  
—  

41,309

(234)

—  
—  
—

—  

—  
—  
—

—  

9,332,386

10

217,442

—  
—  
$

140,617,606

—  
—  
141

80,289
—
$ 1,500,040

—  
—  
$

41,309

—  
—  
$

(234)

—  

(279,381)
(980,597)

$

80,289
(279,381)
519,350

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

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TG Therapeutics, Inc. and Subsidiaries
Consolidated Statements of Cash Flows for the Years Ended December 31
(in thousands)

CASH FLOWS FROM OPERATING ACTIVITIES

Net loss
Adjustments to reconcile net loss to net cash used in operating activities:
Noncash stock compensation expense
Shares issued in connection with in-licensing agreement
Depreciation and amortization
Amortization of premium on investment securities
Amortization of debt issuance costs
Amortization of leasehold interest
Noncash change in lease liability and right of use asset
Change in fair value of notes payable
Changes in assets and liabilities:

Decrease (increase) in other current assets
(Increase) decrease in accrued interest receivable
Increase (decrease) in accounts payable and accrued expenses
(Decrease) increase in lease liabilities
(Decrease) increase in interest payable
(Decrease) increase in other liabilities
Decrease in deferred revenue
Net cash used in operating activities

CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from maturity of short-term securities
Investment in held-to-maturity securities
Purchases of equipment
Net cash (used in) provided by investing activities

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from sale of common stock, net
Proceeds from exercise of options
Proceeds from debt financings
Financing costs paid
Net cash provided by financing activities

NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH

CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF YEAR

CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF YEAR

Reconciliation to amounts on consolidated balance sheets:

Cash and cash equivalents
Restricted cash
Total cash, cash equivalents and restricted cash 

Cash paid for:

Interest

NONCASH TRANSACTIONS
Deferred financing costs
Warrants issued with debt financing
Shares issued in connection with in-licensing

2020

2019

2018

$

(279,381)

$

(172,871)

$

(173,482)

80,289

—  
158
(30)
925
216
2,325
748

2,263
(6)
11,631
(1,988)
(43)
(31,462)
(152)
(214,507)

43,250
(67,403)
(357)
(24,510)

679,680
147
—
—  

679,827

440,810

113,888

554,698

553,439
1,259
554,698

4,501

$

$

$

$

— $
— $
— $

11,335
100
100
(257)
772
182
2,519
124

1,395
(11)
(4,795)
(1,548)
1,491
28,810
(152)
(132,806)

29,250
(29,837)
(131)
(718)

175,021
—
29,987
(795)
204,213

70,689

43,199

113,888

112,637
1,251
113,888

2,622

988
993
100

$

$

$

$

$
$
$

12,886
4,000
88
(119)
—
135
—
(61)

(1,638)
14
10,957
—
—
18,350
(152)
(128,925)

32,500
(31,230)
(90)
1,180

113,639
—
—
—
113,639

(14,106)

57,305

43,199

41,958
1,241
43,199

—

—
—
4,000

$

$

$

$

$
$
$

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

F-5

    
    
    
 
   
   
  
 
   
   
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Unless the context requires otherwise, references in this report to “TG,” “Company,” “we,” “us” and “our” refer to TG Therapeutics, Inc.
and our subsidiaries.

NOTE 1 – ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

DESCRIPTION OF BUSINESS

TG Therapeutics is a fully-integrated, commercial stage biopharmaceutical company focused on the acquisition, development and
commercialization of novel treatments for B-cell malignancies and autoimmune diseases. In addition to an active research pipeline including
five  investigational  medicines  across  these  therapeutic  areas,  we  have  received  accelerated  approval  from  the  U.S.  Food  and  Drug
Administration (FDA) for UKONIQ (umbralisib),  for  the  treatment  of  adult  patients  with  relapsed  or  refractory  marginal  zone  lymphoma
who  have  received  at  least  one  prior  anti-CD20-based  regimen  and  relapsed  or  refractory  follicular  lymphoma  who  have  received  at  least
three prior lines of systemic therapies. Currently, we have two programs in Phase 3 development for the treatment of patients with relapsing
forms of multiple sclerosis (RMS) and patients with chronic lymphocytic leukemia (CLL) and several investigational medicines in Phase 1
clinical  development.  We  also  actively  evaluate  complementary  products,  technologies  and  companies  for  in-licensing,  partnership,
acquisition and/or investment opportunities.

LIQUIDITY AND CAPITAL RESOURCES

We have incurred operating losses since our inception, and expect to continue to incur operating losses for the foreseeable future and

may never become profitable. As of December 31, 2020, we have an accumulated deficit of $980.6 million.

Our major sources of cash have been proceeds from the private placement and public offering of equity securities, and in 2019 from
our loan and security agreement executed with Hercules Capital, Inc. (“Hercules”) (see Note 7 for more information). As of December 31,
2020 we had not yet generated revenue from drug sales of UKONIQ. UKONIQ first became commercially available in the United States in
February of 2021. Even with the commercialization of UKONIQ and the future commercialization of our other drug candidates, we may not
become  profitable.  Our  ability  to  achieve  profitability  depends  on  our  ability  to  generate  revenue  and    many  other  factors,  including  our
ability  to  obtain  regulatory  approval  for  our  drug  candidates;  successfully  complete  any  post-approval  regulatory  obligations;  and
successfully  commercialize  our  drug  candidates  alone  or  in  partnership.  We  may  continue  to  incur  substantial  operating  losses  even  if  we
begin to generate revenues from our drug candidates.

As of December 31, 2020, we had $605.4 million in cash and cash equivalents, and investment securities. We anticipate that our
cash and cash equivalents, and investment securities as of December 31, 2020 will provide sufficient liquidity for more than a twelve-month
period  from  the  date  of  filing  this  Annual  Report  on  Form  10-K  ,  during  which  time  the  Company  plans  to  continue  to  commercialize
UKONIQ in the United States, which commenced in February 2021. The actual amount of cash that we will need to operate is subject to
many factors, including, but not limited to, the timing, design and conduct of clinical trials for our drug candidates. We are dependent upon
significant future financing to provide the cash necessary to execute our current operations, including the commercialization of any of our
drug candidates.

Our common stock is quoted on the Nasdaq Capital Market and trades under the symbol “TGTX.”

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RECENTLY ISSUED ACCOUNTING STANDARDS

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

In  July  2018,  the  Financial  Accounting  Standards  Board  ("FASB")  issued  Accounting  Standards  Update  (“ASU”)  No.  2018-11,
Leases  -  Targeted  Improvements  (“ASU  2018-11”)  as  an  update  to  ASU  2016-02,  Leases  (“ASU  2016-02”  or  “Topic  842”)  issued  on
February 25, 2016. ASU 2016-02 is effective for public business entities for fiscal years beginning January 1, 2019. ASU 2016-02 required
companies to adopt the new leases standard at the beginning of the earliest period presented in the financial statements, which is January 1,
2017, using a modified retrospective transition method where lessees must recognize lease assets and liabilities for all leases even though
those leases may have expired before the effective date of January 1, 2017. Lessees must also provide the new and enhanced disclosures for
each period presented, including the comparative periods.

ASU 2018-11 provides an entity with an additional (and optional) transition method to adopt the new leases standard. Under this
new transition method, an entity initially applies the new lease standard at the adoption date and recognizes a cumulative-effect adjustment to
the opening balance of retained earnings in the period of adoption. Consequently, an entity’s reporting for the comparative periods presented
in  the  financial  statements  in  which  it  adopts  the  new  lease  standard  will  continue  to  be  in  accordance  with  Accounting  Standards
Codification (“ASC”) ASC 840, Leases (“ASC 840”). An entity that elects this additional (and optional) transition method must provide the
required ASC 840 disclosures for all periods that continue to be in accordance with ASC 840. The amendments do not change the existing
disclosure requirements in ASC 840.

ASU 2018-11 is effective for public business entities for fiscal years beginning after December 15, 2018, and interim periods within
those fiscal years, with earlier adoption permitted. The Company adopted ASU 2018-11 on January 1, 2019 using a modified retrospective
method  and  will  not  restate  comparative  periods.  We  elected  the  package  of  practical  expedients  permitted  under  the  transition  guidance,
which  allows  us  to  carry  forward  our  historical  lease  classification  and  our  assessment  on  whether  a  contract  is  or  contains  a  lease.  The
adoption of this guidance resulted in the addition of material balances of ROU assets and lease liabilities to our consolidated balance sheets at
January 1, 2019, primarily relating to our lease of office space (see Note 8). The impact to our consolidated statements of operations was not
material as a result of this standard.

In June 2018, the FASB issued ASU No. 2018-07, Improvements to Nonemployee Share-Based Payment Accounting (“ASU 2018-
07”).  ASU  2018-07  expands  the  scope  of  FASB  Topic  718,  Compensation  –  Stock  Compensation  (“Topic  718”)  to  include  share-based
payment  transactions  for  acquiring  goods  and  services  from  nonemployees.  An  entity  should  only  remeasure  equity-classified  awards  for
which a measurement date has not been established through a cumulative-effect adjustment to retained earnings as of the beginning of the
fiscal year of adoption. Upon transition, the entity is required to measure these nonemployee awards at fair value as of the adoption date. The
entity  must  not  remeasure  assets  that  are  completed.  Disclosures  required  at  transition  include  the  nature  of  and  reason  for  the  change  in
accounting  principle  and,  if  applicable,  quantitative  information  about  the  cumulative  effect  of  the  change  on  retained  earnings  or  other
components of equity.

ASU 2018-07 is effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods
within that fiscal year. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. The Company adopted ASU
2018-07  on  January  1,  2019.  The  adoption  of  ASU  2018-07  did  not  have  a  material  effect  on  our  consolidated  financial  statements  as  of
January  1,  2019.  The  adoption  of  ASU  2018-07  had  no  impact  on  nonemployee  performance  awards  as  they  are  measured  based  on  the
outcome that is probable.

Other  pronouncements  issued  by  the  FASB  or  other  authoritative  accounting  standards  with  future  effective  dates  are  either  not

applicable or not significant to our consolidated financial statements.

USE OF ESTIMATES

The  preparation  of  financial  statements  in  conformity  with  U.S.  generally  accepted  accounting  principles  (“GAAP”)  requires
management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of contingent assets
and  liabilities  at  the  date  of  the  financial  statements  and  the  reported  amounts  of  revenues  and  expenses  during  the  applicable  reporting
period. On an ongoing basis, we evaluate our estimates and judgments, including those related to accrued clinical trial expenses and stock-
based compensation. Actual results could differ from those estimates. Such differences could be material to the financial statements.

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Table of Contents

CASH AND CASH EQUIVALENTS

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

We treat liquid investments with original maturities of less than three months when purchased as cash and cash equivalents.

RESTRICTED CASH

We record cash pledged or held in trust as restricted cash. As of December 31, 2020 and 2019, we have approximately $1.3 million

of restricted cash pledged to secure a line of credit as a security deposit for an Office Agreement (see Note 8).

INVESTMENT SECURITIES

Investment securities at both December 31, 2020 and 2019 consist of short-term government securities. We classify these securities
as held-to-maturity. Held-to-maturity securities are those securities in which we have the ability and intent to hold the security until maturity.
Held-to-maturity securities are recorded at amortized cost, adjusted for the amortization or accretion of premiums or discounts. Premiums and
discounts are amortized or accreted over the life of the related held-to-maturity security as an adjustment to yield using the effective interest
method.

A decline in the market value of any investment security below cost that is deemed to be other than temporary, results in a reduction
in the carrying amount to fair value. The impairment is charged to operations and a new cost basis for the security is established. Other-than-
temporary impairment charges are included in interest and other income (expense), net. Dividend and interest income are recognized when
earned.

CREDIT RISK

Financial  instruments  that  potentially  subject  the  Company  to  concentrations  of  credit  risk  consist  primarily  of  cash  and  cash
equivalents and short-term investments. The Company maintains its cash and cash equivalents and short-term investments with high-credit
quality financial institutions. At times, such amounts may exceed federally-insured limits.

REVENUE RECOGNITION

Effective January 1, 2018, the Company began recognizing revenue under ASC Topic 606, Revenue from Contracts with Customers
(“ASC 606”), using the modified retrospective transition method. The impact of adopting the new revenue standard was not material to our
consolidated financial statements and there was no adjustment to beginning retained earnings on January 1, 2018. The core principle of this
new revenue standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an
amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The following
five steps are applied to achieve that core principle:

● Step 1: Identify the contract with the customer

● Step 2: Identify the performance obligations in the contract

● Step 3: Determine the transaction price

● Step 4: Allocate the transaction price to the performance obligations in the contract

● Step 5: Recognize revenue when the company satisfies a performance obligation

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Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

In order to identify the performance obligations in a contract with a customer, a company must assess the promised goods or services
in  the  contract  and  identify  each  promised  good  or  service  that  is  distinct.  A  performance  obligation  meets  ASC  606’s  definition  of  a
“distinct” good or service (or bundle of goods or services) if both of the following criteria are met:

● The customer can benefit from the good or service either on its own or together with other resources that are readily available

to the customer (i.e., the good or service is capable of being distinct).

● The entity’s promise to transfer the good or service to the customer is separately identifiable from other promises in the contract

(i.e., the promise to transfer the good or service is distinct within the context of the contract).

If a good or service is not distinct, the good or service is combined with other promised goods or services until a bundle of goods or

services is identified that is distinct.

The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised
goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). The consideration
promised  in  a  contract  with  a  customer  may  include  fixed  amounts,  variable  amounts,  or  both.  Variable  consideration  is  included  in  the
transaction price only to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur
when the uncertainty associated with the variable consideration is subsequently resolved.

The transaction price is allocated to each performance obligation on a relative standalone selling price basis. The transaction price
allocated  to  each  performance  obligation  is  recognized  when  that  performance  obligation  is  satisfied,  at  a  point  in  time  or  over  time  as
appropriate.

RESEARCH AND DEVELOPMENT COSTS

Generally, research and development costs are expensed as incurred. Nonrefundable advance payments for goods or services that
will  be  used  or  rendered  for  future  research  and  development  activities  are  deferred  and  amortized  over  the  period  that  the  goods  are
delivered or the related services are performed, subject to an assessment of recoverability. We make estimates of  certain costs incurred in
relation to external clinical research organizations, or CROs, and clinical site costs. We analyze the progress of clinical trials, including levels
of patient enrollment, invoices received and contracted costs when evaluating the adequacy of the amount expensed and the related prepaid
asset  and  accrued  liability.  Judgments  and  estimates  must  be  made  and  used  in  determining  the  accrued  balance  and  expense  in  any
accounting  period  for  expenses  that  are  not  explicitly  defined  by  contractual  rates  and  terms.  We  review  and  accrue  CRO  expenses  and
clinical trial study expenses based on work performed and rely upon estimates of those costs applicable to the stage of completion of a study.
Accrued CRO costs are subject to revisions as such trials progress to completion. Revisions are charged to expense in the period in which the
facts that give rise to the revision become known. With respect to clinical site costs, the financial terms of these agreements are subject to an
initial  negotiation  and  vary  from  contract  to  contract.  Payments  under  these  contracts  may  be  uneven,  and  depend  on  factors  such  as  the
achievement of certain events, the successful recruitment of patients, the completion of portions of the clinical trial or similar conditions. As
such, certain expense accruals related to clinical site costs are recognized based on our estimate of the degree of performance of the event or
events specified in the specific clinical study or trial contract.

Prepaid research and development in our consolidated balance sheets includes, among other things, costs related to agreements with
CROs,  certain  costs  to  third-party  service  providers  related  to  development  and  manufacturing  services  as  well  as  clinical  development.
These agreements often require payments in advance of services performed or goods received. Accordingly, as of December 31, 2020 and
December 31, 2019, we recorded approximately $5.2 million and $8.1 million, respectively, in prepaid research and development related to
such advance agreements.

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Table of Contents

INCOME TAXES

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future
tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and
their respective tax bases, operating losses and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax
rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect
on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment date. If the
likelihood of realizing the deferred tax assets or liability is less than “more likely than not,” a valuation allowance is then created.

We, and our subsidiaries, file income tax returns in the U.S. federal jurisdiction and in various states. We have tax net operating loss
carryforwards that are subject to examination for a number of years beyond the year in which they were generated for tax purposes. Since a
portion of these net operating loss carryforwards may be utilized in the future, many of these net operating loss carryforwards will remain
subject to examination. We recognize interest and penalties related to uncertain income tax positions in income tax expense. Refer to Note 9
for further information on impact of tax reform.

The Coronavirus Aid, Relief, and Economic Security Act of 2020 (“CARES Act”) was enacted on March 27, 2020 in response to
the economic fallout of the COVID-19 pandemic in the United States.  There are several provisions of the CARES Act that were considered
in  the  December  31,  2020  year-end  tax  provision.  However,  the  Company  chose  not  to  utilize  any  provisions  or  participate  in  certain
programs due to lack of a benefit to the Company.

STOCK-BASED COMPENSATION

We  recognize  all  stock-based  payments  to  employees  and  non-employee  directors  (as  compensation  for  service)  as  noncash
compensation expense in the consolidated financial statements based on the fair values of such payments. Stock-based compensation expense
recognized  each  period  is  based  on  the  value  of  the  portion  of  stock-based  payment  awards  that  is  ultimately  expected  to  vest  during  the
period. Forfeitures are recognized as they occur.

In addition, because some of the options, restricted stock and warrants issued to employees, consultants and other third parties vest
upon  achievement  of  certain  milestones,  the  total  expense  is  uncertain.  Compensation  expense  for  such  awards  that  vest  upon  the
achievement of milestones is recognized when the achievement of such milestones becomes probable.

BASIC AND DILUTED NET LOSS PER COMMON SHARE

Basic net loss per share of our common stock is calculated by dividing net loss applicable to the common stock by the weighted-
average number of our common stock outstanding for the period. Diluted net loss per share of common stock is the same as basic net loss per
share of common stock since potentially dilutive securities from stock options, stock warrants and convertible preferred stock would have an
antidilutive effect either because we incurred a net loss during the period presented or because such potentially dilutive securities were out of
the money and the Company realized net income during the period presented. The amounts of potentially dilutive securities excluded from
the  calculation  were  11,976,276,  8,361,739  and  6,528,932  at  December  31,  2020,  2019  and  2018,  respectively.  During  the  years  ended
December 31, 2020, 2019 and 2018, the Company incurred a net loss; therefore, all of the securities are antidilutive and excluded from the
computation of diluted loss per share.

 Unvested restricted stock
 Options
Warrants
 Shares issuable upon note conversion
 Total

2020

9,285,020  
2,526,166  
147,058

18,032  
11,976,276  

December 31, 

2019
5,591,786  
2,605,730  
147,058

17,165  
8,361,739  

2018
4,595,689
1,916,900
—
16,343
6,528,932

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LONG-LIVED ASSETS AND GOODWILL

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Long-lived assets are reviewed for potential impairment when circumstances indicate that the carrying value of long-lived tangible
and intangible assets with finite lives may not be recoverable. Management’s policy in determining whether an impairment indicator exists, a
triggering event, comprises measurable operating performance criteria as well as qualitative measures. If an analysis is necessitated by the
occurrence  of  a  triggering  event,  we  make  certain  assumptions  in  determining  the  impairment  amount.  If  the  carrying  amount  of  an  asset
exceeds its estimated future cash flows, an impairment charge is recognized.

Goodwill is reviewed for impairment annually, or earlier when events arise that could indicate that an impairment exists. We test for
goodwill  impairment  using  a  two-step  process.  The  first  step  compares  the  fair  value  of  the  reporting  unit  with  the  unit’s  carrying  value,
including  goodwill.  When  the  carrying  value  of  the  reporting  unit  is  greater  than  fair  value,  the  unit’s  goodwill  may  be  impaired,  and  the
second step must be completed to measure the amount of the goodwill impairment charge, if any. In the second step, the implied fair value of
the reporting unit’s goodwill is compared with the carrying amount of the unit’s goodwill. If the carrying amount is greater than the implied
fair value, the carrying value of the goodwill must be written down to its implied fair value. We will continue to perform impairment tests
annually,  at  December  31,  and  whenever  events  or  changes  in  circumstances  suggest  that  the  carrying  value  of  an  asset  may  not  be
recoverable. There was no impairment to goodwill as of December 31, 2020.

NOTE 2 – CASH AND CASH EQUIVALENTS

The following tables summarize our cash and cash equivalents at December 31, 2020 and 2019:

 (in thousands)

Checking and bank deposits
Money market funds
    Total

December 31, 
2020

     December 31, 

2019

$

$

399,879
153,560
553,439

$

$

110,135
2,502
112,637

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NOTE 3 – INVESTMENT SECURITIES

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Our investments as of December 31, 2020 and 2019 are classified as held-to-maturity. Held-to-maturity investments are recorded at

amortized cost.

The following tables summarize our investment securities at December 31, 2020 and 2019:

Short-term investments:
Obligations of domestic governmental agencies (maturing between January 2021
and December 2021) (held-to-maturity)
Total short-term investment securities

Short-term investments:
Obligations of domestic governmental agencies (maturing between January 2020
and September 2020) (held-to-maturity)
Total short-term investment securities

NOTE 4 – FAIR VALUE MEASUREMENTS

December 31, 2020

     Amortized     
cost, as
adjusted

Gross
unrealized
holding gains

Gross
unrealized
holding losses

Estimated fair
value

$
$

51,987
51,987

$
$

1
1

$
$

4
4

$
$

51,984
51,984

December 31, 2019

     Amortized     
cost, as
adjusted

Gross
unrealized
holding gains

Gross
unrealized
holding losses

Estimated fair
value

$
$

27,798
27,798

$
$

28
28

$
$

— $
— $

27,826
27,826

We  measure  certain  financial  assets  and  liabilities  at  fair  value  on  a  recurring  basis  in  the  financial  statements.  The  fair  value
hierarchy ranks the quality and reliability of inputs, or assumptions, used in the determination of fair value and requires financial assets and
liabilities carried at fair value to be classified and disclosed in one of the following three categories:

● Level 1 – quoted prices in active markets for identical assets and liabilities;

● Level 2 – inputs other than Level 1 quoted prices that are directly or indirectly observable; and

● Level 3 – unobservable inputs that are not corroborated by market data.

As  of  December  31,  2020  and  2019,  the  fair  values  of  cash  and  cash  equivalents,  restricted  cash,  and  notes  and  interest  payable

approximate their carrying value.

At  the  time  of  our  merger  (we  were  then  known  as  Manhattan  Pharmaceuticals,  Inc.  (“Manhattan”))  with  Ariston
Pharmaceuticals, Inc. (“Ariston”) in March 2010, Ariston issued $15.5 million of five-year 5% notes payable (the “5% Notes”) in satisfaction
of  several  note  payable  issuances.  The  5%  Notes  and  accrued  and  unpaid  interest  thereon  are  convertible  at  the  option  of  the  holder  into
common stock at the conversion price of $1,125 per share. Ariston agreed to make quarterly payments on the 5% Notes equal to 50% of the
net product cash flow received from the exploitation or commercialization of Ariston’s product candidates, AST-726 and AST-915. We have
no obligations under the 5% Notes aside from a) 50% of the net product cash flows from Ariston’s product candidates, if any, payable to
noteholders; and b) the conversion feature, discussed above.

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

The cumulative liability including accrued and unpaid interest of the 5% Notes was approximately $20.3 million at December 31,

2020 and $19.3 million at December 31, 2019. No payments have been made on the 5% Notes through December 31, 2020.

In December 2011, we elected the fair value option for valuing the 5% Notes. The fair value option was elected in order to reflect in

our financial statements the assumptions that market participants use in evaluating these financial instruments.

As of December 31, 2013, as a result of expiring intellectual property rights and other factors, it was determined that net product
cash flows from AST-726 were unlikely. As we have no other obligations under the 5% Notes aside from the net product cash flows and the
conversion  feature,  the  conversion  feature  was  used  to  estimate  the  5%  Notes’  fair  value  as  of  December  31,  2020  and  2019.  The
assumptions, assessments and projections of future revenues are subject to uncertainties, difficult to predict, and require significant judgment.
The use of different assumptions, applying different judgment to inherently subjective matters and changes in future market conditions could
result in significantly different estimates of fair value and the differences could be material to our consolidated financial statements.

The following tables provide the fair value measurements of applicable financial liabilities as of December 31, 2020 and 2019:

(in thousands)

5% Notes
Total

5% Notes
Total

$
$

$
$

Financial liabilities at fair value as of December 31, 2020
Total
Level 1

Level 3

Level 2

— $
— $

— $
— $

938
938

$
$

938
938

Financial liabilities at fair value as of December 31, 2019
Total
Level 1

Level 3

Level 2

— $
— $

— $
— $

190
190

$
$

190
190

The Level 3 amounts above represent the fair value of the 5% Notes and related accrued interest.

The following table summarizes the changes in Level 3 instruments for the years ended December 31, 2019 and 2020:

(in thousands)
Balance at January 1, 2019

Interest accrued on face value of 5% Notes
Conversion of 5% Notes
Change in fair value of Level 3 liabilities

Balance at December 31, 2019

Interest accrued on face value of 5% Notes
Conversion of 5% Notes
Change in fair value of Level 3 liabilities

Balance at December 31, 2020

     $

$

67
924
—
(801)
190
976
—
(228)
938

The  change  in  the  fair  value  of  the  Level  3  liabilities  is  reported  in  other  (income)  expense  in  the  accompanying  consolidated

statements of operations.

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NOTE 5 – STOCKHOLDERS’ EQUITY

Preferred Stock

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Our amended and restated certificate of incorporation authorizes the issuance of up to 10,000,000 shares of preferred stock, $0.001
par value, with rights senior to those of our common stock, issuable in one or more series. Upon issuance, the Company can determine the
rights,  preferences,  privileges  and  restrictions  thereof.  These  rights,  preferences  and  privileges  could  include  dividend  rights,  conversion
rights, voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting any series or the
designation of such series, any or all of which may be greater than the rights of common stock.

Stockholder Rights Plan

On  July  18,  2014,  we  adopted  a  stockholder  rights  plan.  The  stockholder  rights  plan  is  embodied  in  the  Stockholder  Protection
Rights Agreement dated as of July 18, 2014 (the "Rights Agreement"), between us and American Stock Transfer & Trust Company, LLC, as
rights agent (the "Rights Agent").

Accordingly, the Board of Directors declared a distribution of one right (a “Right”) for each outstanding share of common stock, to
stockholders of record at the close of business on July 28, 2014, for each share of common stock issued (including shares distributed from
Treasury) by us thereafter and prior to the Separation Time (as defined in the Rights Agreement), and for certain shares of common stock
issued  after  the  Separation  Time.  Following  the  Separation  Time,  each  Right  entitles  the  registered  holder  to  purchase  from  us  one  one-
thousandth  (1/1,000)  of  a  share  of  Series A  Junior  Participating  Preferred  Stock,  par  value  $0.001  per  share  (the  "Preferred  Stock"),  at  a
purchase price of $100.00 (the "Exercise Price"), subject to adjustment. The description and terms of the Rights are set forth in the Rights
Agreement. Each one one-thousandth of a share of Preferred Stock has substantially the same rights as one share of common stock. Subject to
the terms and conditions of the Rights Agreement, Rights become exercisable ten days after the public announcement that a “Person” has
become an “Acquiring Person” (as each such term is defined in the Rights Agreement). Any Rights held by an Acquiring Person are void and
may not be exercised.

The Rights Agreement was approved by our Board of Directors on July 18, 2014. The Rights will expire at the close of business on

its ten-year anniversary, unless earlier exchanged or terminated by us.

Common Stock

Our  amended  and  restated  certificate  of  incorporation  authorizes  the  issuance  of  up  to  150,000,000  shares  of  $0.001  par  value

common stock.

In  May  2017,  we  filed  a  shelf  registration  statement  on  Form  S-3  (the  "2017  S-3"),  which  was  declared  effective  in  June  2017,
replacing the 2015 S-3. Under the 2017 S-3, we may sell up to a total of $300 million of securities. In connection with the 2017 S-3, we
entered  into  an  At-the-Market  Issuance  Sales  Agreement  (the  "2017  ATM")  with  Jefferies  LLC,  Cantor  Fitzgerald  &  Co.,  FBR  Capital
Markets  &  Co.,  SunTrust  Robinson  Humphrey,  Inc.,  Raymond  James  &  Associates,  Inc.,  Ladenburg  Thalmann  &  Co.  Inc.  and  H.C.
Wainwright  &  Co.,  LLC  (each  a  "2017  Agent"  and  collectively,  the  "2017  Agents"),  relating  to  the  sale  of  shares  of  our  common  stock.
Under the 2017 ATM we pay the 2017 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, 2018, we sold a total of 9,025,222 shares of common stock under the 2017 ATM for aggregate
total  gross  proceeds  of  approximately  $115.8  million  at  an  average  selling  price  of  $12.83  per  share,  resulting  in  net  proceeds  of
approximately $113.7 million after deducting commissions and other transactions costs.

During  the  year  ended  December  31,  2019,  we  sold  a  total  of  13,620,165  shares  of  common  stock  under  the  2017  ATM  for
aggregate  total  gross  proceeds  of  approximately  $99.3  million  at  an  average  selling  price  of  $7.29  per  share,  resulting  in  net  proceeds  of
approximately $97.5 million after deducting commissions and other transactions costs.

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

On  March  1,  2019,  we  completed  a  public  offering  of  4,100,000  shares  of  our  common  stock  (plus  a  30-day  underwriter
overallotment option to purchase up to an additional 615,000 shares of common stock, which was exercised) at a price of $5.87 per share. Net
proceeds  from  this  offering,  including  the  overallotment,  were  approximately  $27.5  million  after  underwriting  discounts  and  offering
expenses of approximately $0.2 million.

On September 5, 2019, we filed an automatic “shelf registration” statement on Form S-3 (the “2019 WKSI Shelf”) as a “well-known
seasoned issuer” as defined in Rule 405 under the Securities Act, which registered an unlimited and indeterminate amount of debt or equity
securities for future issuance and sale. The 2019 WKSI Shelf was declared effective in September 2019. In connection with the 2019 WKSI
Shelf, we entered into an At-the-Market Issuance Sales Agreement (the “2020 ATM”) with Jefferies LLC, Cantor Fitzgerald & Co. and B.
Riley Securities, Inc. (each a “2020 Agent” and collectively, the “2020 Agents”), relating to the sale of shares of our common stock. Under
the 2020 ATM, we pay the 2020 Agents a commission rate of up to 3.0% of the gross proceeds from the sale of any shares of common stock.
In November 2020, we entered into an At-the-Market Issuance Sales Agreement (the “2021 ATM”) with the same terms and agents (each a
“2021 Agent” and collectively, the “2021 Agents”) as the 2020 ATM.

During the year ended December 31, 2020, we sold a total of 8,528,286 shares of common stock under the 2020 ATM for aggregate
total  gross  proceeds  of  approximately  $187.5  million  at  an  average  selling  price  of  $21.99  per  share,  resulting  in  net  proceeds  of
approximately $184.2 million after deducting commissions and other transactions costs.

During the year ended December 31, 2020, we sold a total of 804,100 shares of common stock under the 2021 ATM for aggregate
total gross proceeds of approximately $33.9 million at an average selling price of $42.18 per share, resulting in net proceeds of approximately
$33.3 million after deducting commissions and other transactions costs.

On  December  22,  2019,  we  completed  a  securities  purchase  agreement  with  an  institutional  investor  in  which  we  agreed  to  sell

5,434,783 shares of our common stock at a price of $9.20 per share. Net proceeds from this offering were approximately $50.0 million.

In May 2020, we completed an underwritten public offering of 8,500,000 shares of our common stock (plus an underwriter option to
purchase up to an additional 1,275,000 shares of common stock, which was exercised) at a price of $18 per share. Net proceeds from this
offering,  including  the  overallotment,  were  approximately  $165.1  million,  net  of  underwriting  discounts  and  offering  expenses  of
approximately $10.8 million.

On  December  17,  2020,  we  completed  a  public  offering  of  6,320,000  shares  of  our  common  stock  (plus  a  30-day  underwriter
overallotment option to purchase up to an additional 948,000 shares of common stock, which was exercised) at a price of $43.50 per share.
Net proceeds from this offering, including the overallotment, were approximately $297.2 million after underwriting discounts and offering
expenses of approximately $19.0 million.

The  2019  WKSI  Shelf  is  currently  our  only  active  shelf-registration  statement.  We  may  offer  any  combination  of  the  securities
registered under the 2019 WKSI Shelf from time to time in response to market conditions or other circumstances if we believe such a plan of
financing is in the best interests of our stockholders. We believe that the 2019 WKSI Shelf provides us with the flexibility to raise additional
capital to finance our operations as needed.

Treasury Stock

As of December 31, 2020 and 2019, 41,309 shares of common stock are being held in Treasury, at a cost of approximately $234,000,

representing the fair market value on the date the shares were surrendered to the Company to satisfy employee tax obligations.

Equity Incentive Plans

The  TG  Therapeutics,  Inc.  Amended  and  Restated  2012  Incentive  Plan  (“2012  Incentive  Plan”)  was  approved  by  stockholders  in
June  2020.  Pursuant  to  this  amendment,  8,000,000  shares  were  added  to  the  2012  Incentive  Plan.  As  of  December  31,  2020  and  2019,
2,526,166  and  2,605,730  options,  respectively,  were  outstanding  and  up  to  an  additional  4,054,913  shares  may  be  issued  under  the  2012
Incentive Plan.

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Table of Contents

Stock Options

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

The estimated fair value of the options granted in the year ended December 31, 2020 was determined utilizing the Black-Scholes
option-pricing model at the date of grant. The following table summarizes stock option activity for the years ended December 31, 2020 and
2019:

Outstanding at December 31, 2018
Granted
Exercised
Forfeited
Expired
Outstanding at December 31, 2019
Granted
Exercised
Forfeited
Expired
Outstanding at December 31, 2020

Vested and expected to vest at December 31, 2020
Outstanding at December 31, 2020
Expected to vest at December 31, 2020
Exercisable at December 31, 2020

Number of 
shares

Weighted-
 average 
exercise price

     Weighted-     
average
contractual 
term
(in years)

Aggregate 
intrinsic value

1,916,900
815,000

$
—  

(126,170)
—
2,605,730
75,000
(35,814)
(118,750)
—
2,526,166

2,526,166
2,526,166
2,526,166
910,625

$

$

$
$
$
$

—
6.50  
—  
—  
—  

6.73
8.21
4.10
10.16
—
6.99

6.99  
6.99  
6.99
6.23  

— $

—

8.92

$

11,706,110

8.10

$ 115,472,832

8.10
8.10
8.10
8.13

$ 115,472,832
$ 115,472,832
$ 115,472,832
$ 41,701,656

Total  expense  associated  with  the  stock  options  was  approximately  $6.0  million,  $3.5  million  and  zero  during  the  years  ended
December  31,  2020,  2019  and  2018,  respectively.  As  of  December  31,  2020,  there  was  approximately  $1.7  million  of  total  unrecognized
compensation cost related to unvested time-based stock options, which is expected to be recognized over a weighted-average period of 1.0
year. As of December 31, 2020, the stock options outstanding include options granted to both employees and non-employees which are both
time-based and milestone-based. Stock-based compensation for milestone-based options will be recorded if and when a milestone occurs. We
recognized stock-based compensation expense of $3.8 million during the year ended December 31, 2020 for these stock options.

The fair value of the Company’s option awards were estimated using the assumptions below:

Volatility
Expected term (in years)
Risk-free rate
Expected dividend yield

Year ended

December 31, 2020

December 31, 2019

186.91-191.05 %

172.99-291.61 %

5.0-6.25
0.34-0.54 %
%

—

5.0-6.25  
1.82-2.49 %
%

—

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Restricted Stock

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Certain employees, directors and consultants have been awarded restricted stock. The restricted stock vesting consists of milestone

and time-based vesting. The following table summarizes restricted share activity for the years ended December 31, 2020, 2019 and 2018:

Outstanding at January 1, 2018
Granted
Vested
Forfeited
Outstanding at December 31, 2018
Granted
Vested
Forfeited
Outstanding at December 31, 2019
Granted
Vested
Forfeited
Outstanding at December 31, 2020

Number of shares

     Weighted-average 

grant date fair 
value

6,321,643   $
1,562,211  
(1,596,966) 
(191,196) 
6,095,692  
1,851,520  
(738,960) 
(116,463) 
7,091,789
4,909,829
(1,087,918)
(128,666)
10,785,034

$

7.17
13.07
9.38
8.13
8.07
12.95
9.08
7.96
7.78
20.34
8.40
8.70
13.38

Total  compensation  expense  associated  with  restricted  stock  grants  was  $74.2  million,  $7.8  million  and  $12.9  million  during
the years ended December 31, 2020, 2019 and 2018, respectively. As of December 31, 2020, there was approximately $47.4 million of total
unrecognized  compensation  expense  related  to  unvested  time-based  restricted  stock,  which  is  expected  to  be  recognized  over  a  weighted-
average period of 1 year. This amount does not include, as of December 31, 2020, 2,961,174 shares of restricted stock outstanding which are
milestone-based and vest upon certain corporate milestones; and 1,866,250 shares of restricted stock outstanding issued to non-employees.
Milestone-based noncash compensation expense will be measured and recorded if and when a milestone becomes probable.

Warrants

The Company’s only outstanding warrant is the warrant issued to Hercules as part of our debt agreement to purchase 147,058 shares
of common stock with an exercise price of $4.08. See Note 7 for further details. There was no expense related to warrants during the years
ended December 31, 2020, 2019 and 2018.

NOTE 6 – OTHER LIABILITIES

The following is a summary of notes payable included in other current liabilities on the Company's consolidated balance sheets:

(in thousands)

Convertible 5% Notes Payable
  Totals

December 31, 2020
Non-
current 
portion, 
net

Current 
portion, 
net

Total

December 31, 2019
Non-
current 
portion, 
net

Current 
portion, 
net

$
$

938
938

$
$

— $
— $

938
938

$
$

190
190

$
$

— $
— $

Total

190
190

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Convertible 5% Notes Payable

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

The  5%  Notes  and  accrued  and  unpaid  interest  thereon  are  convertible  at  the  option  of  the  holder  into  common  stock  at  the
conversion  price  of  $1,125  per  share.  We  have  no  obligation  under  the  5%  Notes  aside  from  (a)  50%  of  the  net  product  cash  flows  from
Ariston’s  product  candidates,  if  any,  payable  to  noteholders;  and  (b)  the  conversion  feature,  discussed  above.  Interest  accrues  monthly,  is
added to principal on an annual basis, every March 8, and is payable at maturity, which was March 8, 2015 (see Note 4 for further details).

The cumulative liability including accrued and unpaid interest of these notes was approximately $20.3 million at December 31, 2020

and $19.3 million at December 31, 2019. No payments have been made on the 5% Notes through December 31, 2020.

In December 2011, we elected the fair value option for valuing the 5% Notes. The fair value option was elected in order to reflect in
our financial statements the assumptions that market participants use in evaluating these financial instruments (see Note 4 for further details).

Current Liabilities

In 2018, we entered into an agreement with a contract manufacturer for the clinical and potential commercial supply of one of our
product candidates. As part of this agreement, the contract manufacturer has agreed to defer payment of certain costs and expenses under the
agreement  in  exchange  for  the  payment  of  an  administrative  fee.  To  date  we  have  incurred  expenses  related  to  this  agreement  of
approximately $53.7 million as of December 31, 2020, which include service fees, raw material costs and administrative fees. We have made
payments of $37.4 million to the contract manufacturer as of December 31, 2020. Accordingly, as of December 31, 2020 and 2019, $15.7
million and $47.2 million is included in current liabilities in the Company’s consolidated balance sheets. Of the remaining $15.7 million, $4.2
million is due in the first quarter of 2021.  We will incur an administrative fee of six percent (6%) per year starting from the date of invoice
issuance.  For  the  years  ended  December  31,  2020,  2019  and  2018,  we  have  accrued  $1.2  million,  $1.2  million  and  zero,  respectively,  in
administrative fees in connection with these costs, which has been included in interest expense in the Company’s consolidated statements of
operations.

NOTE 7 – LONG-TERM DEBT

On February 28, 2019 (the “Closing Date”), we entered into a term loan facility of up to $60.0 million (“Term Loan”) with Hercules,
the proceeds of which were used for research and development programs and for general corporate purposes. The Term Loan is governed by
a loan and security agreement, dated February 28, 2019 (the “Loan Agreement”), which provides for up to four separate advances. The first
advance of $30.0 million was drawn on the Closing Date. Two additional advances of $10.0 million may be drawn at our option but subject to
certain  clinical  trial  milestones,  and  the  fourth  advance  of  $10.0  million,  available  in  minimum  increments  of  $5.0  million,  is  available
through December 15, 2020 subject to the approval of Hercules’ investment committee.

The Term Loan will mature on March 1, 2022 (the “Loan Maturity Date”). Each advance accrues interest at a per annum rate of
interest equal to the greater of either (i) the “prime rate” as reported in The Wall Street Journal plus 4.75%, or (ii) 10.25%. The Term Loan
provides  for  interest-only  payments  until  October  1,  2020.  The  interest-only  period  may  be  extended  to  April  1,  2021  if,  on  or  before
September 30, 2020, we achieve either the third milestone or we have raised at least $150.0 million in unrestricted net cash proceeds from
one or more equity financings, subordinated indebtedness and/or upfront proceeds from business development transactions permitted under
the  Loan  Agreement,  in  each  case  after  February  7,  2019,  and  prior  to  September  30,  2020  (“Milestone  IV”).  Thereafter,  amortization
payments will be payable monthly in eighteen installments (or, if the period requiring interest-only payments has been extended to April 1,
2021, in twelve installments) of principal and interest (subject to recalculation upon a change in prime rates). As a result of the Company
having raised in excess of $150 million before the required timeline in the Loan Agreement, the interest-only period has been extended to
April 1, 2021. At our option upon seven business days’ prior written notice to Hercules, we may prepay all or any portion greater than or
equal to $5.0 million of the outstanding advances by paying the entire principal balance (or portion thereof), all accrued and unpaid interest,
subject to a prepayment charge of 3.0%, if such advance is prepaid in any of the first twelve months following the Closing Date; 1.5%, if
such advance is prepaid after twelve months following the Closing Date but on or prior to twenty-four months following the Closing Date;
and 0% thereafter. In addition, a final payment equal to 3.5% of the aggregate principal amount of the loan extended by Hercules is due on
the maturity date. Amounts outstanding during an event of default shall be payable on demand and accrue interest at an additional rate of
4.0% per annum of the past due amount outstanding.

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Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

The  Term  Loan  is  secured  by  a  lien  on  substantially  all  of  our  assets,  other  than  intellectual  property,  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. As of
and through December 31, 2020, the Company has been in compliance with all covenants.

The events of default under the Loan Agreement include, without limitation, and subject to customary grace periods, (1) our failure
to make any payments of principal or interest under the Loan Agreement, promissory notes or other loan documents, (2) our breach or default
in  the  performance  of  any  covenant  under  the  Loan  Agreement,  (3)  the  occurrence  of  a  material  adverse  effect,  (4)  a  false  or  misleading
representation or warranty in any material respect, (5) our insolvency or bankruptcy, (6) certain attachments or judgments on the Borrower’s
assets, or (7) the occurrence of any material default under certain agreements or obligations involving indebtedness in excess of $750,000. If
an event of default occurs, Hercules is entitled to take enforcement action, including acceleration of amounts due under the Loan Agreement.

The  Loan  Agreement  also  contains  warrant  coverage  of  2%  of  the  total  amount  funded.  A  warrant  (the  “Hercules  Warrant”)  was
issued  to  Hercules  to  purchase  147,058  shares  of  common  stock  with  an  exercise  price  of  $4.08.  The  Hercules  Warrant  is  exercisable  for
seven years from the date of issuance. Hercules may exercise the Hercules Warrant either by (a) cash or check or (b) through a net issuance
conversion. The shares will be registered and freely tradeable within six months of issuance. We accounted for the Hercules Warrant as an
equity instrument since it was indexed to our common shares and met the criteria for classification in shareholders’ equity. The relative fair
value of the Hercules Warrant on the date of issuance was approximately $1.0 million and was treated as debt issuance costs and as an offset
to the Term Loan. This amount will be amortized to interest expense using the straight-line method, which approximates the effective interest
method, over the life of the Term Loan.

The  Company  estimated  the  fair  value  of  the  Hercules  Warrant  using  the  Black-Scholes  model  based  on  the  following  key

assumptions:

Exercise price
Common share price on date of issuance
Volatility
Risk-free interest rate
Expected dividend yield
Contractual term (in years)

     $
$

4.08  
6.80
195.9 %
2.63 %
-- %

7.00 years

The Company incurred financing expenses of $2.8 million (including the fair value of the Hercules Warrant) related to the Hercules
Loan Agreement which are recorded as debt issuance costs and as an offset to long-term debt on the Company’s consolidated balance sheet.
The  debt  issuance  costs  are  being  amortized  over  the  term  of  the  debt  using  the  straight-line  method,  which  approximates  the  effective
interest method, and are included in interest expense in the Company’s consolidated statements of operations. Amortization of debt issuance
costs was $0.9 million and $0.8 million for the years ended December 31, 2020 and 2019. At December 31, 2020 and 2019, the remaining
unamortized balance of debt issuance costs was approximately $1.1 million and $2.0 million, respectively.

Long-term debt as of December 31, 2020 and 2019, is as follows (in thousands):

(in thousands)
Long-term debt
End of term fee

Less: unamortized debt issuance costs

Less: current portion
Long-term debt non-current

F-19

December 31,
2020

December 31,
2019

30,000
975
30,975
(1,080)
29,895
(22,179)
7,716

$

$

30,000
975
30,975
(2,005)
28,970
—
28,970

$

$

 
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

NOTE 8 – LEASES

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

In  October  2014,  we  entered  into  an  agreement  (the  “Office  Agreement”)  with  Fortress  Biotech,  Inc.  (“FBIO”)  to  occupy
approximately 45% of the 24,000 square feet of New York City office space leased by FBIO. The Office Agreement requires us to pay our
respective share of the average annual rent and other costs of the 15-year lease. We approximate an average annual rental obligation of $1.4
million under the Office Agreement. We began to occupy this new space in April 2016, with rental payments beginning in the third quarter of
2016. At January 1, 2019, we recognized a lease liability and corresponding ROU asset of $9.5 million and $8.1 million, respectively, based
on the present value of the remaining lease payments for all of our leased office spaces, the majority of which is comprised of our New York
City office space. The present values of our lease liability and corresponding ROU asset are $12.1 million and $9.3 million, respectively, as
of December 31, 2020. Our leases have remaining lease terms of 4 months to 11 years. One lease has a renewal option to extend the lease for
an additional term of two years.

The initial commitment period of the 45% rate was for a period of three (3) years. We and FBIO currently determine actual office
space utilization annually and if our utilization differs from the amount we have been billed, we will either receive credits or be assessed
incremental  utilization  charges.  As  of  December  31,  2020,  the  allocation  rate  is  65%  and  will  be  evaluated  again  in  August  2021  for  the
following rent year. Also in connection with this lease, in October 2014 we pledged $0.6 million to secure a line of credit as a security deposit
for the Office Agreement, which has been recorded as restricted cash in the accompanying consolidated balance sheets. Additional collateral
of $0.6 million was pledged in April 2018 to increase the letter of credit for the office space.

In October 2019, we finalized a five-year lease for office space in New Jersey (the “NJ Lease”). We approximate an average annual
rental obligation of $0.3 million under the NJ Lease. We took possession of this space in October 2019, with rental payments beginning in
November 2019.

The following components of lease expense are included in the Company’s consolidated statements of operations for the years ended

December 31, 2020, 2019 and 2018:

(in thousands)
Operating lease cost
Net lease cost

December 31,   
2020

December 31, 
2019

December 31, 
2018

$
$

2,656
2,656

$
$

2,651
2,651

$
$

1,440
1,440

As of December 31, 2020, the weighted-average remaining operating lease term was 7.7 years and the weighted-average discount
rate for operating leases was 10.25%. Cash paid for amounts included in the measurement of operating lease liabilities during the year ended
December 31, 2020 was $2.0 million.

The balance sheet classification of lease liabilities was as follows:

(in thousands)
Liabilities
Lease liability current portion
Lease liability non-current
Total lease liability

     December 31, 

     December 31, 

2020

2019

$

$

1,669
10,412
12,081

$

$

1,616
10,218
11,834

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

As of December 31, 2020, the maturities of lease liabilities were as follows:

F”

(in thousands)
2021
2022
2023
2024
2025
After 2025
Total lease payments
Less: interest
Present value of lease liabilities(*)

Operating
leases

2,012
2,035
2,040
1,923
1,653
9,884
19,547
(7,466)
12,081

$

$

(*)  As  our  leases  do  not  provide  an  implicit  rate,  we  use  our  incremental  borrowing  rate  based  on  the  information  available  at
commencement  date  and  considering  the  term  of  the  lease  to  determine  the  present  value  of  lease  payments.  We  used  the  incremental
borrowing rate of 10.25% on February 28, 2019, for operating leases that commenced prior to that date.

NOTE 9 – INCOME TAXES

We  account  for  income  taxes  under  the  asset  and  liability  method.  Deferred  tax  assets  and  liabilities  are  determined  based  on
differences between the financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that
will be in effect when the differences are expected to reverse. A valuation allowance is established when necessary to reduce deferred tax
assets  to  the  amount  expected  to  be  realized.  In  determining  the  need  for  a  valuation  allowance,  management  reviews  both  positive  and
negative evidence, including current and historical results of operations, future income projections and the overall prospects of our business.
Based upon management's assessment of all available evidence, we believe that it is more-likely-than-not that the deferred tax assets will not
be realizable, and therefore, a valuation allowance has been established. The valuation allowance for deferred tax assets was approximately
$276.7 million and $186.7 million as of December 31, 2020 and 2019, respectively.  

The  CARES  Act  was  enacted  on  March  27,  2020  in  response  to  the  economic  fallout  of  the  COVID-19  pandemic  in  the  United
States.  There are several provisions of the CARES Act that were considered in the December 31, 2020 year-end tax provision as follows.
  Under  the  CARES  Act,  a  net  operating  loss  carryforward  (“NOL”)  arising  in  tax  years  beginning  after  December  31,  2017  and  before
January 1, 2021 may be carried back to each of the five tax years preceding the tax year of such loss.  The Company has incurred taxable
losses  in  prior  years;  therefore,  there  is  no  carry-back  opportunity  to  the  Company.    Under  the  Tax  Cuts  and  Jobs  Act  of  2017  (“TCJA”),
deductible interest expense was limited to 30% of adjusted taxable income.  The CARES Act increased the limit to 50% of adjusted taxable
income for 2019 and 2020 and allowed companies to elect to use 2019 adjusted taxable income for the 2020 limitation, if it resulted in more
interest expense allowed.  Due to the significant amount of taxable losses, this provision did not provide any benefit to the Company as all
interest expense is disallowed (except as offset by interest income), even under the 50% limitation and using 2019 adjusted taxable income.
 The CARES Act allows employers to defer the deposit and payment of the employer’s share of Social Security taxes during the payroll tax
deferral period of March 27, 2020 through December 31, 2020.  The CARES Act provides for half of the deferred payroll taxes to be paid by
December 31, 2021 and the second half to be paid by December 31, 2022.  The Company did not participate in this deferral program.

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

As  of  December  31,  2020,  we  have  U.S.  NOLs  of  approximately  $956.3  million,  research  and  development  credit  carryforwards
(“R&D credits”) of approximately $27.6 million and business interest expense carryforwards of $7.5 million.  For income tax purposes, these
NOLs  and  R&D  credits  will  expire  in  various  amounts  through  2037.  NOLs  generated  after  2017  and  the  business  interest  expense
carryforwards do not expire. The Tax Reform Act of 1986 contains provisions which limit the ability to utilize NOL carryforwards and R&D
credit carryforwards in the case of certain events including significant changes in ownership interests.  The Exchange Transaction with TG
Bio  may  have  resulted  in  a  “change  in  ownership”  as  defined  by  IRC  Section  382  of  the  Internal  Revenue  Code  of  1986,  as  amended.
Additionally, stock issuance activities may have resulted in a “change in ownership” as defined by IRC Section 382 of the Internal Revenue
Code  of  1986,  as  amended.    Accordingly,  a  substantial  portion  of  the  Company’s  NOLs  above  may  be  subject  to  annual  limitations  in
reducing any future year’s taxable income, and a substantial portion of the R&D credit carryforwards may be subject to annual limitations in
reducing any future year’s tax.

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at

December 31, 2020 and 2019 are presented below.

(in thousands)
Deferred tax assets:
Net operating loss carryforwards
Research and development credit
Noncash compensation
Disallowed interest
Other
Deferred tax asset, excluding valuation allowance

Less valuation allowance
Net deferred tax assets

2020

2019

$

223,685
27,558
22,381
1,855
1,224
276,703

158,177
22,483
4,680
710
661
186,711

(276,703)

— $

(186,711)
—

$

$

There  was  no  current  or  deferred  income  tax  expense  for  the  year  ended  December  31,  2020.  Income  tax  expense  differed  from
amounts computed by applying the U.S. federal income tax rate of 21% for the years ended December 31, 2020, 2019 and 2018, to pretax
loss as follows:

(in thousands)

Loss before income taxes, as reported in the consolidated statements of operations

Computed “expected” tax benefit

Increase (decrease) in income taxes resulting from:

Expected benefit from state and local taxes
Research and development credits
Other
Stock options

Enactment of federal tax reform

Change in the balance of the valuation allowance for deferred tax assets

For the year ended December 31, 
2019

2018

2020

$

$

(279,381)

(58,670)

$

$

(172,871)

(36,303)

$

$

(173,482)

(36,431)

(10,801)
(5,265)
1,065
(1,558)
(14,763)
89,992

(2,128)
(7,266)
641
1,292

—  

43,764

$

— $

— $

(2,243)
(4,726)
639
(473)
—
43,234
—

We file income tax returns in the U.S. federal and various state and local jurisdictions. With certain exceptions, the Company is no
longer subject to U.S. federal and state income tax examinations by tax authorities for years prior to 2016. However, NOLs and tax credits
generated from those prior years could still be adjusted upon audit.

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

The Company would recognize interest and penalties, if any, to uncertain tax positions in income tax expense in the statement of
operations. There was no accrual for interest and penalties related to uncertain tax positions for 2020. We do not believe that there will be a
material change in our unrecognized tax positions over the next twelve months. All of the unrecognized tax benefits, if recognized, would be
offset by the valuation allowance.

NOTE 10 – LICENSE AGREEMENTS

TG-1101 (Ublituximab)

In November 2012, we entered into an exclusive (within the territory) sublicense agreement with Ildong Pharmaceutical Co. Ltd.
(“Ildong”)  relating  to  the  development  and  commercialization  of  ublituximab  in  South  Korea  and  Southeast  Asia.  Under  the  terms  of  the
sublicense  agreement,  Ildong  has  been  granted  a  royalty  bearing,  exclusive  right,  including  the  right  to  grant  sublicenses,  to  develop  and
commercialize ublituximab in South Korea, Taiwan, Singapore, Indonesia, Malaysia, Thailand, Philippines, Vietnam, and Myanmar.

An upfront payment of $2.0 million, which was received in December 2012, net of $0.3 million of income tax withholdings, is being
recognized as license revenue on a straight-line basis over the life of the agreement, which is through the expiration of the last licensed patent
right or 15 years after the first commercial sale of a product in such country, unless the agreement is earlier terminated, and represents the
estimated period over which we will have certain ongoing responsibilities under the sublicense agreement. We recorded license revenue of
approximately $152,000 for each of the years ended December 31, 2020, 2019 and 2018, and, at December 31, 2020 and 2019, have deferred
revenue of approximately $0.8 million and $0.9 million, respectively, associated with this $2 million payment (approximately $152,000 of
which has been classified in current liabilities at December 31, 2020 and 2019).

We may receive up to an additional $5.0 million in payments upon the achievement of pre-specified milestones. In addition, upon

commercialization, Ildong will make royalty payments to us on net sales of ublituximab in the sublicense territory.

TGR-1202 (Umbralisib)

On  September  22,  2014,  we  exercised  our  option  to  license  the  global  rights  to  umbralisib,  thereby  entering  into  an  exclusive
licensing agreement (the “TGR-1202 License”) with Rhizen Pharmaceuticals, SA (“Rhizen”) for the development and commercialization of
umbralisib. Prior to this, we had been jointly developing umbralisib in a 50:50 joint venture with Rhizen.

Under the terms of the TGR-1202 License, Rhizen received a $4.0 million cash payment and 371,530 shares of our common stock
as an upfront license fee. With respect to umbralisib, Rhizen is eligible to receive an aggregate of approximately $175 million in milestone
payments, a small portion of which is attributable to the milestone paid upon the NDA filing for umbralisib and that will be payable based on
the February 2021 FDA approval of umbralisib.  The remainder of the milestone payments are payable on approval in multiple jurisdictions
for up to two oncology indications and one non-oncology indication and attaining certain sales milestones. In addition, if umbralisib is co-
formulated with another drug to create a new product (a "New Product"), Rhizen will be eligible to receive similar regulatory approval and
sales-based  milestone  payments  for  such  New  Product.  Additionally,  Rhizen  will  be  entitled  to  tiered  royalties  on  our  future  net  sales  of
umbralisib  and  any  New  Product.  In  lieu  of  sales  milestones  and  royalties  on  net  sales,  Rhizen  shall  also  be  eligible  to  participate  in
sublicensing revenue, if any, based on a percentage that decreases as a function of the number of patients treated in clinical trials following
the exercise of the license option. Rhizen will retain global manufacturing rights to umbralisib, provided that they are price competitive with
alternative manufacturers.

TG-1501: PDL1 (Cosibelimab)

In  March  2015,  we  entered  into  a  Global  Collaboration  Agreement  (“Collaboration  Agreement”)  with  Checkpoint  for  the
development  and  commercialization  of  anti-PD-L1  and  anti-GITR  antibody  research  programs  in  the  field  of  hematological  malignancies.
The Collaboration Agreement was amended in June 2019 and upon execution of the amendment we incurred an upfront fee of $1.0 million.
We incurred expenses of approximately $1.1 million, $4.1 million and $0.6 million for the years ended December 31, 2020, 2019 and 2018,
respectively, the majority of which relates to manufacturing expenses and milestone payments of PD-L1. The relevant expenses are recorded
in other research and development in the accompanying consolidated statements of operations.

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TG-1601: BET

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

In  May  2016,  as  part  of  a  broader  agreement  with  Jubilant  Biosys  (“Jubilant”),  we  entered  into  a  sub-license  agreement  (“JBET
Agreement”)  with  Checkpoint  Therapeutics,  Inc.  (“Checkpoint”)  (see  Note  11),  for  the  development  and  commercialization  of  Jubilant’s
novel BET inhibitor program in the field of hematological malignancies.

Under the terms of the agreement, we paid Checkpoint an up-front licensing fee of $1.0 million and will make additional payments
contingent  on  certain  preclinical,  clinical,  and  regulatory  milestones,  including  commercial  milestones  totaling  up  to  approximately  $177
million and a single-digit royalty on net sales. TG will also provide funding to support certain targeted research efforts at Jubilant.

TG-1701: BTK

In January 2018, we entered into a global exclusive license agreement with Jiangsu Hengrui Medicine Co. (“Hengrui”), to acquire
worldwide  intellectual  property  rights,  excluding  Asia  but  including  Japan,  and  for  the  research,  development,  manufacturing,  and
commercialization of products containing or comprising of any of Hengrui’s Bruton’s Tyrosine Kinase inhibitors containing the compounds
of either TG-1701 (SHR1459 or EBI1459) or TG1702 (SHR1266 or EBI1266). Pursuant to the agreement, in April 2018, we paid Hengrui an
upfront  fee  of  $1.0  million  in  our  common  stock  recorded  to  noncash  stock  expense  associated  with  in-licensing  agreements  in  our
consolidated  statement  of  operations.  In  addition,  in  July  2019,  we  paid  Hengrui  the  first  milestone  of  $0.1  million  in  our  common  stock
recorded to noncash stock expense associated with in-licensing agreements in our consolidated statement of operations. Hengrui is eligible to
receive  milestone  payments  totaling  approximately  $350  million  upon  and  subject  to  the  achievement  of  certain  milestones.  Various
provisions allow for payments in conjunction with the agreement to be made in cash or our common stock, while others limit the form of
payment. Royalty payments in the low double digits are due on net sales of licensed products and revenue from sublicenses.

TG-1801: anti-CD47/anti-CD19

In June 2018, we entered into a Joint Venture and License Option Agreement with Novimmune SA (“Novimmune”) to collaborate
on the development and commercialization of Novimmune’s novel first-in-class anti-CD47/anti-CD19 bispecific antibody known as TG-1801
(previously  NI-1701).  The  companies  will  jointly  develop  the  product  on  a  worldwide  basis,  focusing  on  indications  in  the  area  of
hematologic B-cell malignancies. We serve as the primary responsible party for the development, manufacturing and commercialization of
the product. Pursuant to the agreement, in June 2018 we paid Novimmune an upfront payment of $3.0 million in our common stock recorded
to noncash stock expense associated with in-licensing agreements in our consolidated statement of operations. Further milestone payments
will be paid based on early clinical development, and the Company will be responsible for the costs of clinical development of the product
through the end of the Phase 2 clinical trials, after which the Company and Novimmune will be jointly responsible for all development and
commercialization  costs.  The  Company  and  Novimmune  will  each  maintain  an  exclusive  option,  exercisable  at  specific  times  during
development,  for  the  Company  to  license  the  rights  to  TG-1801,  in  which  case  Novimmune  is  eligible  to  receive  additional  milestone
payments totaling approximately $185 million as well as tiered royalties on net sales in the high single to low double digits upon and subject
to the achievement of certain milestones.

NOTE 11 – RELATED PARTY TRANSACTIONS

LFB Biotechnologies

On  January  30,  2012,  we  entered  into  an  exclusive  license  agreement  with  LFB  Biotechnologies,  GTC  Biotherapeutics  and
LFB/GTC LLC, all wholly-owned subsidiaries of LFB Group, relating to the development of ublituximab (the “LFB License Agreement”).
In  connection  with  the  LFB  License  Agreement,  LFB  Group  was  issued  5,000,000  shares  of  common  stock,  and  a  warrant  to  purchase
2,500,000 shares of common stock at a purchase price of $0.001 per share.

Under the terms of the LFB License Agreement, we utilize LFB Group for certain development and manufacturing services. As of
December 31, 2020 we accrued approximately $6.0 million in expense related to the achievement of certain milestones of the LFB License
Agreement.  These  expenses  are  included  in  other  research  and  development  expenses  in  the  accompanying  consolidated  statements  of
operations. As of December 31, 2020, we had approximately zero recorded in accounts payable related to the LFB License Agreement.

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Other Parties

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

In October 2014, we entered into the Office Agreement with FBIO, to occupy approximately 45% of the 24,000 square feet of New
York City office space leased by FBIO. The Office Agreement requires us to pay our respective share of the average annual rent and other
costs of the 15-year  lease.  We  approximate  an  average  annual  rental  obligation  of  $1.1  million  under  the  Office  Agreement.  We  began  to
occupy this new space in April 2016, with rental payments beginning in the third quarter of 2016. At January 1, 2019, we recognized a lease
liability of $9.3 million, with a corresponding ROU asset of $7.7 million based on the present value of the remaining lease payments for all of
our  leased  office  spaces,  the  majority  of  which  is  comprised  of  our  New  York  City  office  space.  Mr. Weiss,  our  Executive  Chairman  and
CEO, is also Executive Vice Chairman of FBIO.

Under the Office Agreement, we agreed to pay FBIO our portion of the build-out costs, which have been allocated to us at the 45%
rate mentioned above. The allocated build-out costs have been recorded in Leasehold Interest, net on the Company's consolidated balance
sheets and will be amortized over the 15-year term of the Office Agreement. The initial commitment period of the 45% rate was for a period
of three (3) years. We and FBIO currently determine actual office space utilization annually and if our utilization differs from the amount we
have been billed, we will either receive credits or be assessed incremental utilization charges. As of December 31, 2020, the allocation rate is
65% and will be evaluated again in August 2021 for the following rent year. Also, in connection with this lease, in October 2014 we pledged
$0.6  million  to  secure  a  line  of  credit  as  a  security  deposit  for  the  Office  Agreement,  which  has  been  recorded  as  restricted  cash  in  the
accompanying consolidated balance sheets. Additional collateral of $0.6 million was pledged in April 2018 to increase the letter of credit for
the office space.

In  July  2015,  we  entered  into  a  Shared  Services  Agreement  (the  “Shared  Services  Agreement”)  with  FBIO  to  share  the  cost  of
certain services such as facilities use, personnel costs and other overhead and administrative costs. This Shared Services Agreement requires
us to pay our respective share of services utilized. In connection with the Shared Services Agreement, we incurred expenses of approximately
$0.8 million, $0.9 million and $1.6 million for shared services for the years ended December 31, 2020, 2019 and 2018, respectively, primarily
related to shared personnel.

In May 2016, as part of a broader agreement with Jubilant, we entered into a sublicense agreement with Checkpoint, a subsidiary of
FBIO, for the development and commercialization of Jubilant’s novel BET inhibitor program in the field of hematological malignancies. We
paid  Checkpoint  an  up-front  licensing  fee  of  $1.0  million  in  July  2016  and  incurred  expenses  of  $0.2  million  in  March  2017  for  the  first
milestone  achievement  as  part  of  the  JBET  Agreement  which  is  recorded  in  other  research  and  development  in  the  accompanying
consolidated statement of operations.

In March 2015, we entered into the Collaboration Agreement with Checkpoint for the development and commercialization of anti-
PD-L1 and anti-GITR antibody research programs in the field of hematological malignancies. The Collaboration Agreement was amended in
June 2019 and upon execution of the amendment we incurred an upfront fee of $1.0 million. We incurred expenses of approximately $1.1
million, $4.1 million and $0.6 million for the years ended December 31, 2020, 2019 and 2018, respectively, the majority of which relates to
manufacturing  expenses  and  milestone  expenses  PD-L1.  The  relevant  expenses  are  recorded  in  other  research  and  development  in  the
accompanying consolidated statements of operations.

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Table of Contents

NOTE 12 – COMMITMENTS AND CONTINGENCIES

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

As of December 31, 2020, we have known contractual obligations; commitments and contingencies of $65.2 million related to our

short- and long-term liabilities and operating lease obligations.

Payment due by period (in thousands)
Contractual obligations
Operating leases
Long-term debt
Contract manufacturer
    Total

Contract Manufacturer

Total

Less than 
1 year

1-3 years

3-5 years

More than 
5 years

$

$ 19,548
30,000
15,669  

$

2,012
22,179
15,669  

$

4,075
7,821

—  

3,577
—
—  

$ 65,217

$ 39,860

$ 11,896

$

3,577

$

$

9,884
—
—
9,884

See Note 6 for a detailed description of our current liabilities. Future minimum contractual commitments as of December 31, 2020

total approximately $15.7 million and are due in 2021.

Leases

See  Note  8  for  a  detailed  description  of  our  lease  arrangements  in  New  York  and  New  Jersey.  Total  rental  expense  was

approximately $2.7 million, $2.7 million and $1.4 million for the years ended December 31, 2020, 2019, and 2018, respectively.

Future  minimum  lease  commitments  as  of  December  31,  2020,  in  the  aggregate  total  approximately  $19.5  million  through
December  31,  2031.  The  preceding  table  shows  future  minimum  lease  commitments,  which  include  our  office  leases  in  New  York,  New
Jersey, North Carolina and Tennessee by year as of December 31, 2020.

F-26

    
    
    
    
    
 
   
   
   
   
  
 
Table of Contents

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report

to be signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Date: March 1, 2021

TG THERAPEUTICS, INC.

By:   /s/ Michael S. Weiss

Michael S. Weiss 
Executive Chairman,
Chief Executive Officer and President 

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Table of Contents

POWER OF ATTORNEY

KNOW  ALL  MEN  BY  THESE  PRESENTS,  that  each  person  whose  signature  appears  below  constitutes  and  appoints  each  of
Michael S. Weiss and Sean A. Power, his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for
him and his name, place and stead, in any and all capacities, to sign any or all amendments to this annual report on Form 10-K, and to file the
same, with all exhibits thereto and other documents in connection therewith, with the SEC, granting unto said attorney-in-fact and agent, full
power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to
all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent or any of
his substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Form 10-K has been signed by the following

persons on behalf of the Registrant on March 1, 2021, and in the capacities indicated:

Signatures
/s/ Michael S. Weiss
Michael S. Weiss

/s/ Sean A. Power
Sean A. Power

/s/ Laurence N. Charney
Laurence N. Charney

/s/ Yann Echelard
Yann Echelard

/s/ Kenneth Hoberman
Kenneth Hoberman

/s/ Daniel Hume
Daniel Hume

/s/ William J. Kennedy
William J. Kennedy

/s/ Sagar Lonial
Sagar Lonial

Executive Chairman, Chief Executive Officer and President
(principal executive officer)

Title

Chief Financial Officer (principal financial and accounting
officer)

Director

Director

Director

Director

Director

Director

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Exhibit 4.5

When used herein, the terms “we,” “our,” and “us” refer to TG Therapeutics, Inc.

DESCRIPTION OF SECURITIES

DESCRIPTION OF CAPITAL STOCK

The following summary of the terms of our common stock may not be complete and is subject to, and qualified in its entirety by
reference to, the terms and provisions of our amended and restated certificate of incorporation and our restated bylaws. You should refer
to, and read this summary together with, our amended and restated certificate of incorporation and restated bylaws to review all of the
terms of our common stock that may be important to you.

Common Stock

Under our certificate of incorporation, we are authorized to issue a total of 150,000,000 shares of common stock, par value $0.001
per  share.  All  outstanding  shares  of  our  common  stock  are  fully  paid  and  nonassessable.  Our  common  stock  is  listed  on  the  Nasdaq
Capital Market under the symbol “TGTX.”

Dividends

Subject to the dividend rights of the holders of any outstanding series of preferred stock, holders of our common stock are entitled
to  receive  ratably  such  dividends  and  other  distributions  of  cash  or  any  other  right  or  property  as  may  be  declared  by  our  board  of
directors out of our assets or funds legally available for such dividends or distributions.

Voting Rights

The holders of our common stock are entitled to one vote for each share of common stock owned by that stockholder on every
matter  properly  submitted  to  the  stockholders  for  their  vote.  Stockholders  are  not  entitled  to  vote  cumulatively  for  the  election  of
directors.

Liquidation and Dissolution

In the event of any voluntary or involuntary liquidation, dissolution or winding up of our affairs, holders of common stock would
be entitled to share ratably in our assets that are legally available for distribution to stockholders after payment of liabilities. If we have
any  preferred  stock  outstanding  at  such  time,  holders  of  the  preferred  stock  may  be  entitled  to  distributions  and/or  liquidation
preferences. In either such case, we must pay the applicable distribution to the holders of our preferred stock (if any) before we may pay
distributions to the holders of common stock.

Other

Holders of our common stock have no conversion, redemption, preemptive, subscription or similar rights.

Transfer Agent

American Stock Transfer and Trust Company serves as the transfer agent and registrar for all of our common stock.

Preferred Stock

Under the terms of our restated certificate of incorporation, our board of directors is authorized to issue up to 10,000,000 shares of
preferred stock, par value $0.001 per share. Our board of directors may issues shares of preferred stock in one or more series without
stockholder  approval,  and  has  the  discretion  to  determine  the  rights,  preferences,  privileges  and  restrictions,  including  voting  rights,
dividend rights, conversion rights, redemption privileges and liquidation preferences, of each series of preferred stock. We may amend
from  time  to  time  our  restated  certificate  of  incorporation  to  increase  the  number  of  authorized  shares  of  preferred  stock.  Any  such
amendment would require the

approval  of  the  holders  of  a  majority  of  the  voting  power  of  the  shares  entitled  to  vote  thereon.  As  of  the  current  date,  we  have
10,000,000 shares of preferred shares authorized, but no shares of preferred stock outstanding.

  It  is  not  possible  to  state  the  actual  effect  of  the  issuance  of  any  shares  of  preferred  stock  upon  the  rights  of  the  holders  of
common  stock  until  the  board  of  directors  determines  the  specific  rights  of  the  holders  of  preferred  stock.  However,  effects  of  the
issuance of preferred stock include restricting dividends on common stock, diluting the voting power of common stock, impairing the
liquidation  rights  of  common  stock,  and  making  it  more  difficult  for  a  third  party  to  acquire  us,  which  could  have  the  effect  of
discouraging a third party from acquiring, or deterring a third party from paying a premium to acquire, a majority of our outstanding
voting stock.

The particular terms of any series of preferred stock being offered by us will be described in the applicable prospectus supplement

relating to that series of preferred stock. Those terms may include:

·      the title and liquidation preference per share of the preferred stock and the number of shares offered;

·      the purchase price of the preferred stock;

·      the dividend rate (or method of calculation);

·      the dates on which dividends will be paid and the date from which dividends will begin to accumulate;

·      any redemption or sinking fund provisions of the preferred stock;

·      any listing of the preferred stock on any securities exchange or market;

·      any conversion provisions of the preferred stock;

·      the voting rights, if any, of the preferred stock; and

·            any  additional  dividend,  liquidation,  redemption,  sinking  fund  and  other  rights,  preferences,  privileges,  limitations  and

restrictions of the preferred stock.

The preferred stock will, when issued, be fully paid and non-assessable.

DESCRIPTION OF WARRANTS

We may issue warrants to purchase shares of our common stock and/or preferred stock in one or more series together with other

securities or separately, as described in each applicable prospectus supplement.

The prospectus supplement relating to any warrants we offer will include specific terms relating to the offering. These terms 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;

2

·      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;

·      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  in  the  applicable  prospectus  supplement,  our  debt  securities  will  be  issued  in  one  or  more  series  under  an  indenture  to  be
entered into between us and a trustee. We will issue the debt securities offered by any prospectus supplement under an indenture to be
entered into between us and the trustee identified in the applicable prospectus supplement. 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.  The
particular terms of the debt securities offered by any prospectus supplement and the extent, if any, to which these general provisions may
apply  to  the  debt  securities,  will  be  described  in  the  related  prospectus  supplement.  Accordingly,  for  a  description  of  the  terms  of  a
particular issue of debt securities, reference must be made to both the related prospectus supplement and to the following description.

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. For each series of debt securities we offer, a prospectus supplement will describe the
following terms and conditions of the series of debt securities that we are offering, 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);

3

·      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;

·      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;

4

·      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).

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.

United States federal income tax consequences and special considerations, if any, applicable to any such series will be described in

the applicable prospectus supplement.

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. Information as to the methods for
determining the amount of principal or interest, if any, payable on any date, the currencies, commodities, equity indices or other factors
to which the amount payable on such date is linked and certain additional United States federal income tax considerations will be set
forth in the applicable prospectus supplement.

The  term  “debt  securities”  includes  debt  securities  denominated  in  U.S.  dollars  or,  if  specified  in  the  applicable  prospectus

supplement, 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  $2,000  and  any
integral multiples thereof. Subject to the limitations provided in the indenture and in the prospectus supplement, debt securities that are
issued in registered form may be transferred or exchanged at the principal

5

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  identified  in  the  prospectus  supplement.  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. The specific terms of the depositary arrangement with respect to any debt
securities of a series and the rights of and limitations upon owners of beneficial interests in a global security will be described in the
applicable prospectus supplement.

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  or  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. We will indicate the name and address and other information regarding the unit
agent in the applicable prospectus supplement relating to a particular series of units if we elect to use a unit agent.

We will describe in the applicable prospectus supplement the terms of the series of units being offered, including:

·            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 section will

apply to each unit to the extent such unit consists of shares of our common stock, preferred stock, warrants and/or debt securities.

6

Subsidiaries of TG Therapeutics, Inc.

Exhibit 21.1

Ariston Pharmaceuticals, Inc.

TG Biologics, Inc.

TG Therapeutics AUS Pty Ltd

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in registration statement Nos. 333-181439, 333-210227 and 333-225868 on
Form S-8 and registration statement Nos. 333-233636 and 333-226097 on Form S-3 of TG Therapeutics, Inc. of our report
dated March 1, 2021 on our audits of the consolidated financial statements of TG Therapeutics, Inc. and Subsidiaries as of
December 31, 2020 and 2019, and for each of the three years in the period ended December 31, 2020, and our report on our
audit of internal control over financial reporting of TG Therapeutics, Inc. and Subsidiaries as of December 31, 2020, dated
March 1, 2021, included in this Annual Report on Form 10-K of TG Therapeutics, Inc. and Subsidiaries for the year ended
December 31, 2020.

Exhibit 23.1

/s/ CohnReznick LLP

New York, New York
March 1, 2021

Exhibit 31.1

CERTIFICATION OF PERIODIC REPORT
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Michael S. Weiss, certify that:

1.

I have reviewed this annual report on Form 10-K of TG Therapeutics, Inc.;

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, including its
consolidated subsidiaries, 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 this 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.

Date: March 1, 2021

/s/ Michael S. Weiss
Michael S. Weiss
Executive Chairman, Chief Executive Officer and President
Principal Executive Officer

Exhibit 31.2

CERTIFICATION OF PERIODIC REPORT
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Sean A. Power, certify that:

1.

I have reviewed this annual report on Form 10-K of TG Therapeutics, Inc.;

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, including its
consolidated subsidiaries, 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 this 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.

Date: March 1, 2021

/s/ Sean A. Power
Sean A. Power
Chief Financial Officer
Principal Financial and Accounting Officer

Exhibit 32.1

STATEMENT OF CHIEF EXECUTIVE OFFICER OF

TG THERAPEUTICS, INC.

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the annual report of TG Therapeutics, Inc. (the “Company”) on Form 10-K for the year ended
December 31, 2020 as filed with the Securities and Exchange Commission (the “Report”), I, Michael S. Weiss, Executive
Chairman, Chief Executive Officer and President of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted
pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, based on my knowledge:

1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of

1934, as amended; and

2) The information contained in the Report fairly presents, in all material respects, the financial condition and results

of operations of the Company.

Date: March 1, 2021

/s/ Michael S. Weiss
Michael S. Weiss
Executive Chairman, Chief Executive Officer and President
Principal Executive Officer

Exhibit 32.2

STATEMENT OF CHIEF FINANCIAL OFFICER OF

TG THERAPEUTICS, INC.

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the annual report of TG Therapeutics, Inc. (the “Company”) on Form 10-K for the year ended
December 31, 2020 as filed with the Securities and Exchange Commission (the “Report”), I, Sean A. Power, Chief
Financial Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley
Act of 2002, that, based on my knowledge:

1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of

1934, as amended; and

2) The information contained in the Report fairly presents, in all material respects, the financial condition and results

of operations of the Company.

Date: March 1, 2021

/s/ Sean A. Power
Sean A. Power
Chief Financial Officer
Principal Financial and Accounting Officer