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TG Therapeutics

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FY2019 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, 2019.

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, if any, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T
during the preceding 12 months (or for such shorter period that the registrant was required to submit and post 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 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 $687,572,082 as of June 30, 2019, based on the closing sale price of such stock as reported on the NASDAQ Capital Market.

There were 109,401,184 shares of the registrant’s common stock, $0.001 par value, outstanding as of February 21, 2020.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s Proxy Statement for the 2020 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, 2019

TABLE OF CONTENTS

SPECIAL CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS

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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This Annual Report on Form 10-K contains trademarks and trade names of TG Therapeutics, Inc., including our name and logo. All
other trademarks, service marks, or trade names referenced in this Annual Report on Form 10-K are the property of their respective owners.

    
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This Annual Report on Form 10-K contains forward-looking statements that involve substantial risks and uncertainties. All statements,
other than statements of historical facts, contained in this Annual Report on Form 10-K are 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.

The forward-looking statements in this Annual Report on Form 10-K include, but are not limited to, statements about:

● the initiation, timing, progress and results of our pre-clinical studies and clinic trials, including, without limitation, our on-going

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;
● the timing or likelihood of regulatory filings and approvals;
● the commercialization of our drug candidates, if approved;
● the pricing and reimbursement of our drug candidates, if approved;
● 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  drug  candidates  and

technologies;

● 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.

Any forward-looking statements in this Annual Report on Form 10-K reflect our current views with respect to future events or to our
future financial performance and involve known and unknown risks, uncertainties and other important factors that may cause our actual results,
performance or achievements to be materially different from any future results, performance or achievements expressed or implied by these
forward-looking statements. We have included important factors in the cautionary statements included in this Annual Report on Form 10-K,
particularly in the “Risk Factors” section, that could cause actual results or events to differ materially from the forward-looking statements that
we make. Given these uncertainties, you should not place undue reliance on these forward-looking statements. Our forward-looking statements
do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make or enter into.

You should read this Annual Report on Form 10-K and the documents that we have filed as exhibits to this Annual Report on Form 10-
K completely and with the understanding that our actual future results, performance or achievements may be materially different from what we
expect. Except as required by law, we assume no obligation to update or revise these forward-looking statements for any reason, even if new
information becomes available in the future.

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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:

●
●

●
●
●
●
●
●
●
●
●
●
●
●
●

●
●

expectations for increases or decreases in expenses;
expectations  for  the  clinical  and  pre-clinical  development,  manufacturing,  regulatory  approval,  and  commercialization  of  our
pharmaceutical product candidates or any other products we may acquire or in-license;
use of clinical research centers and other contractors;
expectations as to the timing of commencing or completing pre-clinical and clinical trials and the expected outcomes of those trials;
expectations for incurring capital expenditures to expand our research and development and manufacturing capabilities;
expectations for generating revenue or becoming profitable on a sustained basis;
expectations or ability to enter into marketing and other partnership agreements;
expectations or ability to enter into product acquisition and in-licensing transactions;
expectations or ability to build our own commercial infrastructure to manufacture, market and sell our drug candidates;
products being accepted by doctors, patients or payors;
ability to compete against other companies and research institutions;
ability to secure adequate protection for our intellectual property;
ability to attract and retain key personnel;
availability of reimbursement for our products;
estimates of the sufficiency of our existing cash and cash equivalents and investments to finance our operating requirements, including
expectations regarding the value and liquidity of our investments;
stock price and its volatility; and
expectations for future capital requirements.

Our actual results may differ materially from the results anticipated in these forward-looking statements due to a variety of factors, including,
without limitation, those discussed under the captions “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of
Operations” and elsewhere in this report, as well as other factors which may be identified from time to time in our other filings with the Securities and
Exchange  Commission,  or  the  SEC,  or  in  the  documents  where  such  forward-looking  statements  appear.  Given  these  uncertainties,  you  should  not
place  undue  reliance  on  these  forward-looking  statements.  Our  forward-looking  statements  do  not  reflect  the  potential  impact  of  any  future
acquisitions, mergers, dispositions, joint ventures or investments we may make or enter into.

You should read this Annual Report on Form 10-K and the documents that we have filed as exhibits to this Annual Report on Form 10-K
completely and with the understanding that our actual future results, performance or achievements may be materially different from what we expect.
Any forward-looking statements in this Annual Report on Form 10-K reflect our current views with respect to future events or to our future financial
performance  and  involve  known  and  unknown  risks,  uncertainties  and  other  important  factors  that  may  cause  our  actual  results,  performance  or
achievements  to  be  materially  different  from  any  future  results,  performance  or  achievements  expressed  or  implied  by  these  forward-looking
statements. The forward-looking statements contained in this report reflect our views and assumptions only as of the date this report is signed. Except
as required by law, we assume no obligation to update or revise these forward-looking statements for any reason, even if new information becomes
available in the future.

This Annual Report on Form 10-K also contains estimates, projections and other information concerning our industry, our business and the
markets  for  certain  diseases,  including  data  regarding  the  estimated  size  of  those  markets,  and  the  incidence  and  prevalence  of  certain  medical
conditions. Information that is based on estimates, forecasts, projections, market research or similar methodologies is inherently subject to uncertainties
and  actual  events  or  circumstances  may  differ  materially  from  events  and  circumstances  reflected  in  this  information.  Unless  otherwise  expressly
stated, we obtained this industry, business, market and other data from reports, research surveys, studies and similar data prepared by market research
firms and other third parties, industry, medical and general publications, government data and similar sources.

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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.

ITEM 1. BUSINESS.

OVERVIEW

We  are  a  biopharmaceutical  company  dedicated  to  developing  and  delivering  medicines  for  patients  with  B-cell  mediated  diseases,
including Chronic Lymphocytic Leukemia (CLL), non-Hodgkin Lymphoma (NHL) and Multiple Sclerosis (MS). We have developed a robust
B-cell  directed  research  and  development  (R&D)  platform  for  identification  of  key  B-cell  pathways  of  interest  and  rapid  clinical  testing.
Currently,  we  have  five  B-cell  targeted  drug  candidates  in  clinical  development,  with  the  lead  two  therapies,  ublituximab  (TG-1101)  and
umbralisib (TGR-1202), in pivotal trials for CLL, NHL and MS. Ublituximab is a novel anti-CD20 monoclonal antibody (mAb) that has been
glycoengineered for enhanced potency over first generation antibodies. Umbralisib is an oral, once daily, dual inhibitor of PI3K-delta and CK1-
epsilon, which may lead to a differentiated safety profile. When used together in combination therapy, ublituximab and umbralisib are referred
to as "U2". Additionally, in early clinical development we have an anti-PD-L1 monoclonal antibody referred to as cosibelimab (TG-1501), an
oral Bruton’s Tyrosine Kinase (“BTK”) inhibitor referred to as TG-1701, and an anti-CD47/CD19 bispecific antibody referred to as TG-1801.

We  also  actively  evaluate  complementary  products,  technologies  and  companies  for  in-licensing,  partnership,  acquisition  and/or
investment opportunities. To date, we have not received approval for the sale of any of our drug candidates in any market and, therefore, have
not generated any product sales from our drug candidates.

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 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. The primary objective of these cohorts is to assess the efficacy of single agent umbralisib as measured by
Overall  Response  Rate  (ORR).  In  February  2019,  we  announced  that  the  MZL  cohort  met  the  primary  endpoint  of  ORR  as
determined by Independent Review Committee (IRC) for all treated patients (n=69). The results met our target guidance of 40-
50%  ORR.  Interim  safety  and  efficacy  data  from  the  MZL  cohort  were  presented  in  an  oral  presentation  at  three  medical
meetings,  the  American  Association  for  Cancer  Research  (AACR)  annual  meeting  in  April  2019,  the  American  Society  of
Clinical Oncology (ASCO) annual meeting in June 2019 and the International Conference on Malignant Lymphoma (ICML) also
in June 2019. In October 2019, we announced that the FL patients within the FL/SLL cohort met the primary endpoint of ORR as
determined by Independent Review Committee (IRC) for all treated patients (n=118). The results also met our target guidance of
40-50% ORR. Most recently, in January of 2020, we received guidance from the FDA allowing submission of a single New Drug
Application  (NDA)  for  MZL  and  FL  indications  and  initiated  a  rolling  submission  of  an  NDA  to  the  FDA  for  umbralisib  in
MZL/FL. We anticipate completion of the rolling submission in the first half of 2020.

● 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 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 study completed enrollment in October 2017 with over 600 patients enrolled across the four treatment
arms,  with  approximately  420  patients  in  the  U2  and  the  active  control  arm  combined.  This  trial  is  conducted  under  Special
Protocol Assessment (SPA) with the FDA.

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● 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. Full enrollment for the
ULTIMATE studies was completed in second half of 2018, with approximately 1,100 subjects enrolled in both studies combined.

● ULTRA-V  Phase  2b  Trial  Evaluating  U2  plus  Venetoclax  in  CLL:  ULTRA-V  is  a  Phase  2b  open-label,  multicenter,
registration-directed  clinical  trial  designed  to  investigate  the  efficacy  and  safety  of  ublituximab  and  umbralisib  (U2)  combined
with  venetoclax  in  subjects  with  Chronic  Lymphocytic  Leukemia.  The  primary  endpoint  for  this  study  is  ORR  and  Complete
Response (CR) rate. This trial is currently enrolling.

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 1-212-554-4484, 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

Our Strategy 

● Completing our current Phase 3 and registration-directed trials for umbralisib and ublituximab, including, UNITY-CLL, UNITY-

NHL, and the ULTIMATE Phase 3 Program in MS;

● Gaining regulatory approval for umbralisib in NHL, umbralisib plus ublituximab (“U2”) in CLL, and ublituximab in MS;
● Preparing for commercial launch and building commercial capability to ensure, when approved, broad access to patients for the

approved indications for umbralisib and ublituximab;

● Developing U2 in NHL;
● Advancing cosibelimab (TG-1501), TG-1701, and TG-1801 through clinical development and defining potential regulatory paths

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

● Building upon the MS program to expand ublituximab into 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.

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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 better outcomes for patients.

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 all our drug candidates
are focused in one disease area, we can rapidly explore combination therapies, which we believe is essential to improving outcomes for patients
and holds the key to 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 the treatment of patients; and
● An external network of more than 350 community and academic clinical trial sites globally.

B-CELL DISEASES OVERVIEW

B-cell  mediated  diseases  comprise  a  constellation  of  disorders  that  result  from  cancerous  B-cells  or  aberrant  B-cells.  In  the  case  of
cancerous  B-cells,  the  most  common  forms  of  B-cell  cancers  or  B-cell  malignancies  are  non-Hodgkin  Lymphoma  (NHL)  and  Chronic
Lymphocytic Leukemia (CLL). In the case of aberrant B-cells, many autoimmune diseases are believed to result from aberrant B-cell activity,
including, Multiple Sclerosis (MS), Rheumatoid Arthritis (RA), and Lupus.

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

Chronic Lymphocytic Leukemia Overview

CLL  is  the  most  common  type  of  adult  leukemia,  and  in  2019,  it  is  estimated  there  will  be  more  than  20,000  new  cases  of  CLL
diagnosed in the United States1.  Although  signs  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.

Marginal Zone Lymphoma Overview

MZL comprises a group of indolent (slow growing) B-cell non-Hodgkin lymphomas (NHLs) that begin forming in the marginal zone
of lymphoid tissue. With an annual incidence of approximately 7,500 newly diagnosed patients in the United States2, MZL is the third most
common B-cell NHL, accounting for approximately eight 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)3.

1 Cancer Stat Facts: Leukemia – Chronic Lymphocytic Leukemia https://seer.cancer.gov/statfacts/html/clyl.html

2 2016 Lymphoid Malignancy Statistics by World Health Organization Subtypes VOLUME 66 _ NUMBER 6 _ NOVEMBER/DECEMBER
2016 https://onlinelibrary.wiley.com/doi/pdf/10.3322/caac.21357

3 Lymphoma Research Foundation: Marginal Zone Lymphoma https://lymphoma.org/aboutlymphoma/nhl/mzl/

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Follicular Lymphoma Overview

FL is typically a slow-growing or indolent form of NHL which accounts for 20 to 30 percent of all NHL cases4, with a prevalence of
approximately 245,0005 and an incidence of approximately 31,0006 in the US, Japan, and 5 major EU markets. Advanced stage FL is usually
not considered to be curable, but more of a chronic disease, with patients living for many years.

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  1,000,000  people  are  living  with  MS  in  the  United  States7  and
approximately 85 percent are initially diagnosed with RRMS8. The majority of people who are diagnosed with RRMS will eventually transition
to SPMS, in which they experience steadily worsening disability over time.

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 own 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 2020.

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

Umbralisib (Dual 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

4 Lymphoma Research Foundation: Follicular Lymphoma https://lymphoma.org/aboutlymphoma/nhl/fl/
5 Decision Resources via Pharmacyclics Investor Presentation, December 2014

6 Global Data 2016 NHL Model

7 National MS Society https://www.nationalmssociety.org/About-the-Society/MS-Prevalence

8 Multiple Sclerosis International Federation, 2013 via Datamonitor p. 236

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Ublituximab Overview

Ublituximab (also referred to as TG-1101) is a glycoengineered anti-CD20 monoclonal antibody that targets a unique epitope on the
CD20 antigen found on the surface of B-lymphocytes. We hold exclusive worldwide rights to develop and commercialize ublituximab for all
indications, except for the territories of France and Belgium for which an option to commercialize has been retained by LFB Biotechnologies,
South Korea and Southeast Asia which we licensed to Ildong Pharmaceutical Ltd in November 2012.

Generally,  anti-CD20  antibodies  are  believed  to  exert  their  B-cell  depleting  effects  through  three  primary  mechanisms:  antibody
dependent  cell-mediated  cytotoxicity  (ADCC),  complement  dependent  cytotoxicity  (CDC),  and  direct  or  programmed  cell  death  (DCD  or
PCD). Ublituximab has been specifically glycoengineered to enhance ADCC activity, which should enhance its ability to deplete B-cells and
may improve its anti-cancer effects when compared to rituximab the leading anti-CD20 monoclonal antibody, which had worldwide sales in
2018 of approximately $7 billion.

ADCC is a mechanism that is dependent on interactions between the Fc region of the antibody and the FcγR receptors on immune
system effector cells, most notably the Fc−gammaRIIIA (CD16) receptor found on NK cells. These interactions trigger effector cells to release
cytotoxic molecules and proteases resulting in B-cell death. Ublituximab is a next generation, type I chimeric IgG1 monoclonal antibody with a
glycoengineered  Fc  region  designed  specifically  to  induce  higher  ADCC  activity  in  comparison  to  rituximab.  In  pre-clinical  (non-human)
experiments, ublituximab has demonstrated an ability to enhance ADCC by >50x over rituximab, resulting in enhanced potency.

Umbralisib Overview

Umbralisib  (also  referred  to  as  TGR-1202)  is  an  oral,  once  daily  dual  inhibitor  of  PI3K-delta  and  CK1-epsilon,  with  nanomolar
potency  to  the  delta  isoform  and  high  selectivity  over  the  alpha,  beta,  and  gamma  isoforms.  Umbralisib  also  uniquely  inhibits  CK1-epsilon,
which  may  lead  to  a  differentiated  safety  profile.  The  phosphoinositide-3-kinases  (“PI3Ks”)  are  a  family  of  enzymes  involved  in  various
cellular functions, including cell proliferation and survival, cell differentiation, intracellular trafficking, and immunity. There are four isoforms
of PI3K (alpha, beta, delta, and gamma), of which the delta isoform is strongly expressed in cells of hematopoietic origin, and often implicated
in B-cell related lymphomas.

In October 2016, a manuscript titled, "Silencing c-Myc Translation as a Therapeutic Strategy through Targeting PI3K Delta and CK1
Epsilon in Hematological Malignancies," was published online in the First Edition section of Blood, the Journal of the American Society of
Hematology. The publication presents preclinical data describing the synergy of umbralisib with the proteasome inhibitor carfilzomib and the
unique effects of the combination to silence c-Myc in various preclinical lymphoma and myeloma models. 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.

Early Clinical Development of Ublituximab and Umbralisib

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

Two single-agent, dose-escalation, Phase I studies were undertaken with ublituximab to establish an optimal dose in patients with NHL
and CLL. The first was a two part first-in-human Phase I clinical trial completed in France in which ublituximab was evaluated in relapsed or
refractory CLL. In 2012 a second single-agent Phase I study was undertaken in the US entitled "An Open Label Phase I/II Trial of the Efficacy
and Safety of TG-1101 in Patients with B-cell Non-Hodgkin Lymphoma who have Relapsed or are Refractory After CD20 Directed Antibody
Therapy." In July 2014, this trial completed enrollment of 35 patients, of which 12 patients were included in the dose escalation component and
23 patients in various expansion cohorts. All enrolled patients were relapsed or refractory to rituximab or a rituximab containing regimen, and
in most cases multiple other lines of therapy. Dr. Owen O'Connor, Professor of Medicine and Director, Center for Lymphoid Malignancies at
New York Presbyterian Columbia Medical Center was the Principal Investigator for the multi-center study. Data from this study were published
in  the  British  Journal  of  Haematology  in  February  2017.  In  both  Phase  1  studies,  single  agent  ublituximab  was  deemed  well  tolerated  by
treating investigators and displayed promising clinical activity in relapsed and refractory patients.

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

In May 2016, we commenced our first study of ublituximab in patients with relapsing forms of multiple sclerosis (RMS), a chronic
demyelinating  disease  of  the  central  nervous  system  (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 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
Annualized Relapse Rate (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 European Committee for Treatment and Research in Multiple Sclerosis (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 January 2013, we initiated a Phase I, open label, multi-center, first-in-human clinical trial of umbralisib in patients with hematologic
malignancies. The study entitled "A Phase I Dose Escalation Study Evaluating the Safety and Efficacy of TGR-1202 in Patients with Relapsed
or  Refractory  Hematologic  Malignancies,"  is  being  run  in  collaboration  with  the  Sarah  Cannon  Research  Institute  in  Nashville,  TN  with
Howard “Skip” Burris, MD, Executive Director, Drug Development as the acting Study Chair. Enrollment was open to patients with relapsed or
refractory NHL, CLL, and other select hematologic malignancies. As of February 2016, this study closed to enrollment.

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.”  The  paper  includes  safety  and  efficacy  information  from  90
patients with relapsed or refractory hematologic malignancies, including patients with CLL and various forms of lymphoma treated with single
agent umbralisib. In this study, the data showed that umbralisib was well tolerated with a favorable safety profile.

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Additional Early Studies with Ublituximab (TG-1101) and/or Umbralisib (TGR-1202)

In  addition  to  the  above  Phase  1  trials  for  ublituximab  and  umbralisib,  the  following  Phase  1  and  Phase  2  studies,  as  well  as  an

integrated analysis were conducted:

● Phase 1/2 Study of Umbralisib, Ublituximab and Venetoclax in patients with relapsed or refractory CLL – In December
2019, we presented triple therapy data from patients with relapsed/refractory CLL treated with the triple therapy combination of
ublituximab,  umbralisib  and  venetoclax  during  an  oral  session  at  the  61st  American  Society  of  Hematology  (ASH)  annual
meeting and exposition. At the time of presentation, twenty-seven patients were evaluable for safety and 23 were evaluable for
efficacy. The triple therapy regimen was administered with 3 cycles of U2 induction/debulking to reduce the risk of tumor lysis
syndrome (TLS), followed by the combination of umbralisib and venetoclax starting in cycle 4. Patients who were bone marrow
MRD negative after cycle 12 stopped all therapy. Overall response rate (ORR) of 87% (20/23) after U2 induction period at cycle
3, prior to introduction of venetoclax, in relapsed/refractory CLL patients, including patients refractory to ibrutinib. U2 induction
appeared to reduce venetoclax TLS risk, with no patients remaining as TLS high-risk following 3 cycles of U2. 13 patients were
treated for >7 cycles and 9 patients for > 12 cycles, with the following response rates observed: 100% ORR (13/13) after cycle 7
for the triple combination; 100% ORR (9/9) including 44% Complete Response (CR) after cycle 12 for the combination; 100%
(9/9) of patients had undetectable minimal residual disease (MRD) (<0.01%) in peripheral blood after 12 cycles of therapy; and
78% (7/9) of patients who completed 12 cycles of therapy had undetectable MRD in bone marrow and have stopped therapy. At
the  time  of  the  presentation,  no  patients  (n=27)  had  progressed  with  a  median  follow-up  of  6.4  months.    Overall  the  triplet
regimen was generally well tolerated with no events of TLS observed.

● 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  2019,  we  presented  data  from  patients
with  relapsed/refractory  NHL  and  CLL  treated  with  the  triple  therapy  combination  of  TG-1701,  umbralisib  and  ublituximab
during a poster session at the 61st American Society of Hematology (ASH) annual meeting and exposition. The proprietary triplet
of U2 plus TG-1701 induced 86% ORR (6 of 7) in patients with relapsed/refractory NHL and CLL at the lowest dose of TG-1701
tested. Of the 7 patients treated with the triple, 4 patients had follicular lymphoma (FL), of which 2 achieved a complete response
(CR), 1 patient achieved partial response (PR) and 1 patient had stable disease SD). The remaining three patients treated with the
combination included the following: 1 patient with marginal zone lymphoma (MZL) achieved a PR, 1 patient with Waldenström's
macroglobulinemia (WM) achieved a PR; and 1 patient with diffuse large B-cell lymphoma (DLBCL) achieved a PR. As of the
time of the presentation, all patients treated with the triple combination of TG-1701 plus U2 remained on study.

● 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
ublituximab and umbralisib, (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.  Enrollment  in  all  cohorts  is  now  closed  and  patients  continued  to  be
followed for safety and efficacy. Data highlights from each cohort include the following:

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o Ublituximab plus Umbralisib (U2):

◾ In December 2015 we presented the results from the U2 portion of this trial at the 57th American Society of Hematology
(ASH)  annual  meeting,  Abstract  Number  1538.  The  presentation  included  data  from  patients  with  relapsed  and
refractory NHL and CLL treated with U2. The combination was well tolerated in the 71 patients evaluable for safety at
all  dose  levels  up  through  1200mg.  This  was  a  heavily  pretreated  population  with  high-risk  features,  including  58%
refractory to last treatment with multiple previous lines of rituximab-based therapy. Notably, the only Grade 3/4 adverse
event  occurring  in  >  5%  of  patients  was  neutropenia  and  of  the  71  patients  available  for  safety,  only  6  patients  (8%)
discontinued due to an umbralisib related event. Additionally, 26 patients had been on U2 for 6+ months, with no events
of colitis reported as of the date of publication. Efficacy data was presented on patients treated at the higher doses of
umbralisib  (1200mg  of  the  original  formulation  and  600mg  or  greater  of  the  micronized  formulation).  80%  (8  of  10)
ORR  was  observed  in  patients  with  CLL/SLL,  including  1  complete  response  (CR)  and  7  partial  responses  (PRs).
Notably, 75% of CLL patients had high-risk cytogenetics (17p and/or 11q del). 71% (12 of 17) ORR was observed in
heavily pretreated patients with indolent NHL (FL & MZL), including 4 CRs (24%) and 8 PRs, with 4 of the remaining
5 patients achieving stable disease.

◾ 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.  The  paper  includes  safety  and  efficacy  information  from  22  patients  with  CLL  or
small  lymphocytic  lymphoma  (SLL)  and  53  patients  with  NHL  treated  with  the  combination  of  ublituximab  and
umbralisib, referred to as “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% overall response rate (ORR)
was observed in patients relapsed/refractory indolent NHL (n=20), including a 100% ORR amongst MZL patients (n=5).

◾ These data are described further in the manuscript entitled, “Ublituximab and Umbralisib in Relapsed/ Refractory B-cell
Non-Hodgkin Lymphoma and Chronic Lymphocytic Leukemia,” which was published online in the First Edition section
of Blood, the Journal of the American Society of Hematology.

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. 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  September  2019,  at  the  XVIII  iwCLL  meeting  in  Edinburgh,  Scotland,  data  was  presented  from  51  patients  with  CLL  who
were  intolerant  to  prior  BTK  or  PI3K  delta  inhibitor  therapy  who  were  then  treated  with  single  agent  umbralisib.  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 adverse event (AE) also experienced with prior kinase inhibitor therapy.
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.

● Umbralisib Long-term Follow-up Integrated Analysis in Patients with Relapsed/Refractory Hematologic Malignancies—
In  December  2017,  at  the  59th  ASH  Annual  Meeting,  the  Company  presented  integrated  long-term  follow-up  data  from  347
patients exposed to umbralisib across 5 studies, which continued to demonstrate high response rates in CLL, and FL coupled with
a favorable safety profile. In June 2018, an update on the data was presented at the 23rd Congress of the European Hematology
Association  (EHA).  The  presentation  included  data  pooled  from  4  completed  or  ongoing  Phase  1  or  2  studies  containing
umbralisib,  focusing  on  177  patients  who  have  been  on  daily  umbralisib  for  a  minimum  of  6  months.  Patients  were  heavily
pretreated, with 45% of patients having seen 3 or more prior lines of therapy. Umbralisib continued to exhibit a tolerable safety
profile with serious adverse events occurring in >1% of patients after 6 months on therapy limited to pneumonia (3%), diarrhea
(2%), and cellulitis (2%) with only 2% of patients discontinuing umbralisib as a result of diarrhea/colitis after being on umbralisib
for more than 6 months.

● 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
Bruton's tyrosine kinase (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.

● 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. The data from the CLL cohort of this study supported the Phase 3 GENUINE study
evaluating ublituximab plus ibrutinib in CLL patients with high-risk cytogenetics.

● 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.

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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:

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.  The
primary analysis of ORR will be conducted once all treated patients have had at least 9 cycles (Cycle = 28 days) of follow-up.
Secondary endpoints include safety, duration of response, and progression-free survival (PFS). 

In  February  2019,  we  announced  that  the  MZL  cohort  met  the  primary  endpoint  of  ORR  as  determined  by  IRC  for  all  treated
patients (n=69). The results met our target guidance of 40-50% ORR. Interim safety and efficacy data from the MZL cohort were
presented in an oral presentation at the American Association for Cancer Research (AACR) annual meeting on April 1, 2019. The
data presented included safety and tolerability data on all 69 treated patients (safety population) and efficacy data on 42 patients
who  were  enrolled  at  least  9  cycles  (28  day  cycles)  prior  to  the  data  cut-off  date  (interim  efficacy  population).  The  safety
population had a median duration of exposure of 6.9 months and no unexpected toxicities were observed. Analysis of the interim
efficacy  population  showed  an  ORR  by  IRC  of  52%,  including  19%  CR  rate,  an  88%  clinical  benefit  rate  by  IRC  (defined  as
patients obtaining Complete Response + Partial Response + Stable Disease) and a median duration of exposure of 10.1 months.
These results were also presented in oral presentations during the 2019 American Society of Clinical Oncology (ASCO) annual
meeting and the 2019 International Conference on Malignant Lymphoma (ICML) both held in June of 2019.

Previously, 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.

Most  recently,  in  January  of  2020,  we  initiated  a  rolling  submission  of  an  NDA  to  the  FDA  for  umbralisib  as  a  treatment  for
previously treated MZL or FL. We anticipate completion of this rolling submission in the first half of 2020.  

● 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).  The  results  met  our  target  guidance  of  40-50%  ORR.  Importantly,  umbralisib
monotherapy  appeared  to  be  well  tolerated  with  a  safety  profile  consistent  with  previous  reports.  Most  recently,  in  January  of
2020, we received guidance from the FDA allowing submission of a single NDA for MZL and FL indications. As noted earlier,
we  initiated  a  rolling  submission  of  an  NDA  to  the  FDA  for  umbralisib  in  MZL/FL  and  anticipate  completion  of  the  rolling
submission in the first half of 2020. We plan to present the data at a future medical conference as well as discuss the data with the
FDA.

● 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.

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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 Special Protocol Assessment (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.

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  are  no  longer  planning  to  seek  accelerated  approval  for  U2  in  CLL  based  on  ORR.  The
Company remains blinded to all efficacy data and the trial continues to be conducted under SPA agreement with the FDA. We await the results
for  the  primary  endpoint  for  the  study,  PFS,  to  seek  full  approval  for  U2  in  patients  with  CLL,  if  the  study  is  positive.  Importantly,  an
application  based  on  PFS  is  expected  to  support  full  approval  versus  accelerated  approval,  which  is  a  conditional  approval.  Additionally,  in
September 2018, the DSMB reviewed safety data from over 600 patients, including over 300 patients treated with umbralisib either alone or in
combination  with  ublituximab,  of  which  approximately  60%  were  treatment  naïve.  After  review  of  the  data,  the  DSMB  identified  no  safety
concerns and recommended the trial continue without modification.

In March 2019, the UNITY-CLL Data and Safety Monitoring Board (DSMB) conducted a pre-planned futility analysis of PFS. The
DSMB determined that the trial was not futile and recommended the UNITY-CLL trial continue as planned. The pre-specified futility analysis
of the UNITY-CLL trial did not allow for early stopping due to positive efficacy but only for lack of efficacy. The DSMB also again reviewed
safety information from all 600+ CLL patients on the UNITY-CLL trial, including over 300 treatment naive and previously treated patients on
umbralisib alone or in combination with ublituximab. Based on its review, no safety concerns were identified and the DSMB recommended the
UNITY-CLL trial continue without modification.

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. Due to enrollment challenges associated with this study, in October 2016, we announced revisions
to the design of the GENUINE study to accelerate its completion. Initially the study was being conducted pursuant to an SPA with the FDA,
and was designed to enroll approximately 330 patients, with a two-part analysis of both ORR and PFS. The trial as amended in October 2016,
and PFS was removed as a co-primary endpoint leaving ORR as the sole primary endpoint. The target number of patients was also reduced to
120 patients. The SPA was terminated at the time the changes were implemented.

In  March  2017,  we  reported  positive  top-line  data  from  the  GENUINE  study.   The  study  met  its  primary  endpoint  demonstrating  a
statistically  significant  improvement  in  ORR,  as  determined  by  an  Independent  Review  Committee  (IRC)  using  the  iwCLL  (Hallek  2008)
criteria, compared to ibrutinib alone in both the Intent to Treat (ITT) population (p=0.001) and Treated population (p < 0.001). 

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In  June  2017,  the  results  were  presented  by  Dr.  Jeff  P.  Sharman,  Medical  Director,  Hematology  Research,  US  Oncology  in  an  oral
session  during  the  53rd  American  Society  of  Clinical  Oncology  ("ASCO")  Annual  Meeting  in  Chicago,  IL.  We  had  hoped  to  use  the  ORR
results  from  the  GENUINE  trial  to  file  for  accelerated  approval  for  the  combination  of  ublituximab  plus  ibrutinib.  In  October  of  2017,  we
announced the results of a meeting with the FDA related to the potential accelerated approval application. The FDA had expressed concern that
an intervening approval for the treatment of relapsed or refractory CLL could, as available therapy, have the effect of blocking our accelerated
approval application. In June 2018, venetoclax received full approval for the treatment of relapsed or refractory CLL, the same indication for
which we planned to file for accelerated approval. While we do believe under the FDA guidance related to accelerated approval that there are
benefits of ublituximab plus ibrutinib over presently available therapies that could support approval, we have decided at this time to not pursue
the filing of the results from the GENUINE trial to support accelerated approval.

In  October  2019,  we  announced  that  final  long-term  results  from  the  Phase  3  GENUINE  study  demonstrated  that  ublituximab  in
combination with ibrutinib improved progression-free survival (PFS), as determined by Independent Review Committee (IRC). Additionally,
the combination of ublituximab and ibrutinib was well tolerated with no new safety signals identified at a median follow-up of >4 years. We
plan to present these final data at a future medical conference, as well as share the results with the U.S. Food and Drug Administration (FDA).

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. Each trial was
designed  to  enroll  approximately  440  subjects,  randomized  in  a  1:1  ratio.    This  trial  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 two Phase 3 clinical trials for ublituximab,
referred to as the ULTIMATE I and ULTIMATE II 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 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, and topline
results from the ULTIMATE I & II trials are expected in the second half of 2020.

ULTRA-V Phase 2b Trial Evaluating U2 plus Venetoclax in CLL: ULTRA-V is a Phase 2b open-label, multicenter, registration-
directed clinical trial designed to investigate the efficacy and safety of ublituximab and umbralisib (U2) combined with venetoclax in subjects
with Chronic Lymphocytic Leukemia. The primary endpoint for this study is ORR and CR rate. This trial is currently enrolling.

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.

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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.

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 ublituximab and umbralisib (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 2019.

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 antibody dependent cellular cytotoxicity (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.

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In in vitro assays, TG-1801 induces antibody-dependent cellular phagocytosis (ADCP) and antibody-dependent cellular cytotoxicity
(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.

COSTS AND TIME TO COMPLETE PRODUCT DEVELOPMENT

The information below provides estimates regarding the costs associated with the completion of the current development phase and
our current estimated range of the time that will be necessary to complete that development phase for our key pipeline products. We also direct
your attention to the risk factors which could significantly affect our ability to meet these cost and time estimates found in this report in Item 1A
under the heading “Risks Related to the Company’s Business and Industry.” 

Product Candidate
Ublituximab & Umbralisib

Ublituximab
Umbralisib + Ublituximab

Target Indication
  CLL patients
In  Relapsing  forms  of  Multiple
Sclerosis (RMS)
  Relapsed/refractory NHL patients

  Development
Status
  Phase III

Estimated
Completion
of Phase
  2020

  Estimated  Cost 
Phase
  Approximately $2 million

to  Complete

Phase III
  Phase IIb

2020
  2021*

Approximately $15 million
  Approximately $3 million

*Completion of phase for this study indicates completion of portion of study, which, if successful, would support an accelerated approval.

Completion  dates  and  costs  in  the  above  table  are  estimates  due  to  the  uncertainties  associated  with  clinical  trials  and  the  related
requirements of development. In the cases where the requirements for clinical trials and development programs have not been fully defined, or
are dependent on the success of other trials, we cannot estimate trial completion or cost with any certainty. The actual spending on each trial
during the year is also dependent on funding. We therefore direct your attention to Item 7 under the heading “Liquidity and Capital Resources.”

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.

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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  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 2020 are summarized below. Each of these portfolios
contains pending patent applications covering our drug candidates and uses and combinations of the drug candidates, prosecution has just begun
or 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.  We  expect  this  to  be  the  case  with  respect  to  our  pending  patent
applications referred to below.

Additionally, because the date for any potential regulatory approval is currently unknown we cannot predict the expected expiration

date, and it is possible that the life of these patents following regulatory approval could be minimal.

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 protections 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.  

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The composition of matter patent for ublituximab has been issued in the U.S. and Europe, which affords patent protection until 2029 in
the U.S. and 2025 in Europe, exclusive of patent term extensions. We also have a method of use patent on the combination of umbralisib and
ublituximab which has been issued in the U.S., Europe, and Japan, and is pending in other territories globally. Additionally, we have numerous
granted patents and pending patent applications outside the U.S. which include claims directed to the composition of matter and methods of
treatment with ublituximab in various settings.

Umbralisib

Pursuant to our license for umbralisib with Rhizen, we have the exclusive commercial rights to a series of 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  umbralisib  as  well  as  method  of  use  patents  which  cover  use  of  umbralisib  in  combination  with
various agents and for various therapeutic indications. The composition of matter patent for umbralisib has been issued in the U.S. and Europe,
which affords patent protection until 2033, exclusive of patent term extensions. We also have a method of use patent on the combination of
umbralisib  and  ublituximab  which  has  been  issued  in  the  U.S.,  EU,  and  Japan,  and  is  pending  in  other  territories  globally.  All  other  patent
applications currently filed for umbralisib are currently pending. Because the dates for any potential regulatory approval are currently unknown
we cannot predict the expected expiration date, and it is possible that the life of these patents following regulatory approval could be minimal.

Cosibelimab (anti-PDL1 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  patent  applications  pending  in  the  United  States,  Australia,  Canada,  Europe,
Israel and Korea. Any patents maturing from these pending applications will expire no sooner than October 2033. 

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. All patent applications currently filed for the BTK program are currently pending. Any patents maturing from these
pending applications will expire no sooner than October 2034.

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  the  non-exclusive  right  to  certain
technology patent applications. Any patents maturing from these pending applications will expire no sooner than December 2032. 

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
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.

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.

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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,  and  for  the
treatment of nodal, extranodal, and splenic MZL in April 2019.  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.  We  believe  that
ublituximab  and  umbralisib,  as  well  as  our  other  pipeline  products  may  be  eligible  for  additional  Orphan  Drug  Designations;  however,  we
cannot  assure  you  that  ublituximab,  umbralisib,  or  any  other  drug  candidates  we  may  acquire  or  in-license,  will  obtain  such  Orphan  Drug
Designations or that we will be the first to receive FDA approval for any drug candidates that do obtain Orphan Drug Designation so as to be
eligible for market exclusivity protection.

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.

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 2019, FDA had approved 26 biosimilar applications.

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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. 

Upon FDA approval, we believe umbralisib would qualify for five years of data exclusivity as a NCE and ublituximab would qualify

for twelve years of data exclusivity as an innovator biologic.

 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.

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.

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 New Drug Application (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"),

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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 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.

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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.

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),  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  two  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.

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● For  the  treatment  of  Marginal  Zone  Lymphoma,  if  approved,  we  expect  umbralisib  to  compete  with  ibrutinib  (AbbVie  and
Janssen),  lenalidomide  (Bristol-Myers)  and  established  treatments  such  as  rituximab  and  several  generically  available
chemotherapies.

● For  the  treatment  of  Follicular  Lymphoma,  if  approved,  we  expect  umbralisib  to  compete  with  approved  drugs  such  as
obinutuzumab  (Roche),  idelalisib  (Gilead),  copanlisib  (Bayer),  and  duvelisib  (Verastem),  lenalidomide  (Bristol-Myers)  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  also  several  PI3K  delta  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 umbralisib.

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 is one anti-
CD20  monoclonal  antibody  approved,  ocrelizumab  (Roche),  and  another  having  recently  completed  Phase  3  development,
ofatumumab (Novartis), which is expected to enter the market in the next 12 months.

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  and  umbralisib  we  will  need  to  scale-up  production  to  ensure  adequate  commercial  supply,  complete  validation  batches  and
complete  pre-approval  inspection  batches.  We  are  currently  in  the  process  of  scaling  up  ublituximab  and  completing  validation  and  pre-
approval inspection batches for both ublituximab and umbralisib. 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.

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.

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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  are  subject  to  ongoing  periodic  and  unannounced  inspections  by  the  FDA,  the  Drug  Enforcement
Administration  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  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 drug candidates, as well as our ongoing research and development
activities. None of our drug candidates 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  approval  process
implemented  by  the  FDA  under  the  FDCA.  The  FDA  regulates,  among  other  things,  the  pre-clinical  and  clinical  testing,  safety,  efficacy,
approval,  manufacturing,  record  keeping,  adverse  event  reporting,  packaging,  labeling,  storage,  advertising,  promotion,  export,  sale  and
distribution of biopharmaceutical products.

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 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.

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For purposes of NDA 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  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 fast track drug development programs. A sponsor can apply for fast
track designation at the time of submission of an IND, or at any time prior to receiving marketing approval of the new drug application, 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.

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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 ordinarily are eligible for priority review of a completed application in six months or less and also may
be permitted to submit portions of an NDA to the FDA for review before the complete application is submitted.

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 designated as fast track and as breakthrough therapy 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  you  have  to  be  the  first  company  to  have  a  treatment  that  successfully  addresses  a
certain unmet medical need or you need to clearly be better than all other treatments for that medical need, subject to certain qualifications.
Many companies have filed for accelerated approval and have subsequently failed to obtain such approval for a variety of reasons, including not
being first or not being best. 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  confirmation  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 confirmation clinical
trials are not successful, the FDA has the right to remove the drug from the market and has done so in the 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.

It  is  also  becoming  more  common  for  the  FDA  to  request  a  Risk  Evaluation  and  Mitigation  Strategy,  or  REMS,  as  part  of  a
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.

As part of the approval process, the FDA must inspect and approve each manufacturing facility. Among the conditions of approval is
the requirement that a manufacturer’s quality control and manufacturing procedures conform to cGMP. Manufacturers must expend significant
time, money and effort to ensure continued compliance, and the FDA conducts periodic inspections to certify compliance. It may be difficult for
our manufacturers or 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.

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

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 US FDA, such as the ORR data we intend to use as the basis for a filing for umbralisib in MZL, may be
insufficient  to  file  for  marketing  application  outside  of  the  US.  At  present,  companies  are  typically  required  to  apply  for  foreign  marketing
authorizations at a national level. However, within the European Union, registration procedures are available to companies wishing to market a
product  in  more  than  one  European  Union  member  state.  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  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 United States, 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.  It is unclear how the ultimate decision in this case, or other efforts to repeal,
replace, or invalidate the Affordable Care Act or its implementing regulations, or portions thereof, will affect the Affordable Care Act or our
business.  Further, on January 20, 2017, U.S. President Donald Trump signed an Executive Order directing federal agencies with authorities and
responsibilities  under  the  Affordable  Care  Act  to  waive,  defer,  grant  exemptions  from,  or  delay  the  implementation  of  any  provision  of  the
Affordable  Care  Act  that  would  impose  a  fiscal  burden  on  states  or  a  cost,  fee,  tax,  penalty  or  regulatory  burden  on  individuals,  healthcare
providers, health insurers, or manufacturers of pharmaceuticals or medical devices. On October 13, 2017, President Trump signed an Executive
Order  that  terminated  the  cost-sharing  subsidies  under  the  Affordable  Care  Act.  Several  state  Attorneys  General  filed  suit  to  stop  the
administration from terminating these subsidies, but on October 25, 2017, a federal judge in California denied their request for a restraining
order.  In  addition,  CMS  has  issued  regulations  giving  states  greater  flexibility,  starting  in  2020,  in  the  identification  of  the  essential  health
benefits  benchmarks  for  non-grandfathered  individual  and  small  group  market  health  insurance  coverage,  including  plans  sold  through  the
health insurance exchanges established under the Affordable Care Act. There may be further action to repeal, replace or modify the Affordable
Care Act. While any legislative and regulatory changes will likely take time to develop and may or may not have an impact on the regulatory
regime to which we are subject, we cannot predict the ultimate content, timing or effect of any healthcare reform legislation or the impact of
potential legislation on us.

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  is
currently  assessing  additional  proposals  that  are  designed  to  affect  drug  pricing,  such  as  tying  U.S.  drug  prices  to  prices  outside  the  United
States.  Congress  and  the  Trump  administration  have  each  indicated  that  they  will  continue  to  seek  new  legislative  and/or  administrative
measures to control drug costs.  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.

 In addition, in some foreign countries, the proposed pricing for a drug must be approved before it may be lawfully marketed. The
requirements governing drug pricing vary widely from country to country. For example, the European Union provides options for its member
states to restrict the range of medicinal drugs for which their national health insurance systems provide reimbursement and to control the prices
of medicinal drugs for human use. A member state may approve a specific price for the medicinal drug or it may instead adopt a system of
direct or indirect controls on the profitability of the company placing the medicinal drug on the 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 drugs. Historically, drugs launched in the European Union do not follow price structures of the United States and
generally tend to be significantly lower.

Other 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 and physician sunshine laws and regulations.

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
programs.  The  government  has  enforced  the  Anti-Kickback  Statute  to  reach  large  settlements  with  healthcare  companies  based  on  sham
consulting  and  other  financial  arrangements  with  physicians.  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.

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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.  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, 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 the privacy and security of health information in certain circumstances, many of which
differ from each other in significant ways, thus complicating compliance efforts.

 EMPLOYEES

As of February 14, 2020, we had 134 full and part-time employees. None of our employees are represented by a collective bargaining

agreement, and we have never experienced a work stoppage.

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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.

Risks Related to Our Financial Position and Need for Additional Capital

We  are  a  biopharmaceutical  company  with  a  limited  operating  history  and  have  not  generated  any  revenue  from  drug  sales.  We  have
incurred significant operating losses since our inception and anticipate that we will incur continued losses for the foreseeable future.

We  are  a  biopharmaceutical  company  with  a  limited  operating  history  on  which  investors  can  base  an  investment  decision.
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 and undertaking pre-clinical studies and commencing clinical trials. We have
never generated any revenue from drug sales. We have not obtained regulatory approvals for any of our drug candidates.

We  have  not  yet  demonstrated  our  ability  to  successfully  complete  large-scale,  pivotal  clinical  trials,  obtain  regulatory  approvals,
manufacture a commercial scale drug, or arrange for a third party to do so on our behalf, or conduct sales and marketing activities necessary for
successful commercialization. Typically, it takes many years to develop one new drug from the time it is discovered to when it is available for
treating patients. Consequently, any predictions about our future success or viability may not be as accurate as they could be if we had a longer
operating  history.  We  will  need  to  transition  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 substantially all of our efforts and financial resources on clinical trials and manufacturing of our drug
candidates. To date, we have financed our operations primarily through public offerings of our common stock and a debt financing. Through
February 18, 2020, we have received an aggregate of approximately $640 million from such transactions. Approximately $610 million of that
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. The remaining $30.0 million is from our term loan facility with Hercules that we secured in February 2019.

Since inception, we have incurred significant operating losses. As of December 31, 2019, we had an accumulated deficit of $701.2
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.  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, if we obtain regulatory approval for our drug
candidates, we will incur significant sales, marketing and outsourced-manufacturing expenses. We also have incurred and will continue to incur
additional costs associated with operating as a public company. 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 drug candidates and it is uncertain when and if we will generate any
revenue from the sale of our drugs 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  developing,  obtaining  regulatory
approval  for  and  manufacturing  and  marketing  our  product  candidates.  Accordingly,  we  do  not  expect  to  generate  significant  and  sustained
revenue unless and until we obtain marketing approval of, and begin to sell umbralisib, ublituximab and/or one of our other product candidates.
Our ability to generate 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 drug candidates;

● Obtain  approval  from  the  U.S.  Food  and  Drug  Administration  (FDA)  and  Foreign  equivalents  to  market  and  sell  our  drug

candidates;

● Establish commercial manufacturing capabilities alone and/or with third parties that are satisfactory to the regulatory authorities,

cost effective, and that are capable of providing commercial supply of our drug candidates;

● Establish  a  commercial  infrastructure  to  commercialize  our  drug  candidates,  if  approved,  by  developing  a  sales  force  and/or

entering into collaborations with third parties; and

● Achieve market acceptance of our drug candidates 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, umbralisib,
ublituximab, cosibelimab, TG-1701 and TG-1801 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 develop an infrastructure to commercialize our drug candidates. In
addition, depending on the status of regulatory approval or, if we obtain marketing approval for any of our drug candidates, we expect to incur
significant commercialization expenses related to drug sales, marketing, manufacturing and distribution. Moreover, in anticipation of filing for
regulatory approvals for umbralisib and ublituximab we will need to expend substantial resources on manufacturing and new drug application
(NDA)/ biologics license application (BLA) preparation over the next 12 to 24 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;

● the costs and timing of regulatory approvals;
● the costs and timing of clinical and commercial manufacturing supply arrangements for each product candidate;
● the costs of establishing sales or distribution capabilities;
● the success of the commercialization of our products;
● 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 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  umbralisib  and/or  ublituximab  or  any  of  our  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, none of our product candidates have 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  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 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 the development of our product candidates. In the event we do not successfully raise subsequent financing, our product development
activities will necessarily be curtailed commensurate with the magnitude of the shortfall. If our 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  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.

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.

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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.

Risks Related to our Indebtedness

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. In addition, we have incurred short-term liabilities of approximately $47.2
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.

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.

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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  most  advanced  drug  candidates  or  other  drug  candidates  and  ultimately  cannot
commercialize our most advanced drug candidates or other drug candidates, or experience significant delays in doing so, our business will
be materially harmed.

We are a development-stage biopharmaceutical company, and do not currently have any commercial products that generate revenues or
any other sources of revenue. We may never be able to successfully develop marketable products. Our pharmaceutical development methods
are unproven and may not lead to commercially viable products for a variety of reasons. We have substantially invested all of our efforts and
financial  resources  in  the  identification  and  pre-clinical  and  clinical  development  of  our  drug  candidates,  including  ublituximab,  umbralisib,
cosibelimab, TG-1701 and TG-1801. Our ability to generate drug revenues will depend completely on the successful completion of our current
and future Phase 3 and registration-directed clinical trials and commercialization of our drug candidates, which may never occur. We currently
generate no revenues from sales of any drugs, and we may never be able to develop or commercialize a marketable drug. Each of our drug
candidates  will  require  additional  non-clinical  or  clinical  development,  management  of  clinical,  non-clinical  and  manufacturing  activities,
regulatory approval in multiple jurisdictions, obtaining or manufacturing supply, building of a commercial organization, substantial investment
and significant marketing efforts before we generate any revenues from drug sales. The success of our most advanced drug candidates and other
drug candidates will depend on several factors, including the following:

● Successful completion of our UNITY-NHL trial, UNITY-CLL trial and our ULTIMATE I and II trials;
● Receipt of regulatory approvals from applicable regulatory authorities for our drug candidates;
● Establishing commercially viable arrangements with third-party manufacturers for clinical supply and commercial manufacturing;
● Obtaining and maintaining patent and trade secret protection or regulatory exclusivity for our drug candidates;
● Establishing sales and marketing capabilities, whether alone or through a collaboration, to support commercialization of our drug

candidates;

● Acceptance of the drug candidates, if and when approved, by patients, the medical community and third-party payors;
● Effectively differentiating and competing with other therapies;
● Establishing  competitive  prices  for  any  drug  candidates  that  receive  regulatory  approval  that  reflect  the  value  that  the  drug
candidates  offer  in  the  indications  for  which  they  are  approved;  Obtaining  and  maintaining  healthcare  coverage  and  adequate
reimbursement;

● Enforcing and defending intellectual property rights and claims; and
● Maintaining an acceptable safety profile of the drug candidates following approval.

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

successfully commercialize our drug candidates, which would materially harm our business.

If we are unable to develop or receive regulatory approval for or successfully commercialize any of our product candidates, we will
not  be  able  to  generate  product  revenues  and  we  may  not  be  able  to  continue  our  operations.  Even  if  we  are  able  to  develop  or  receive
regulatory approval for or successfully commercialize any of our product candidates, we may not be able to gain market acceptance for our
product candidates if healthcare providers and patients do not view the overall safety, tolerability and efficacy profile of our drug candidates
favorably.

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Because the results of preclinical studies and early clinical trials are not necessarily predictive of future results, any product candidate we
advance into clinical trials may not have favorable results in later clinical trials, if any, or receive regulatory approval.

Pharmaceutical development has inherent risks. The outcome of pre-clinical 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, pre-
clinical  and  clinical  data  are  often  susceptible  to  varying  interpretations  and  analyses,  and  many  companies  that  have  believed  their  drug
candidates performed satisfactorily in pre-clinical studies and clinical trials have nonetheless failed to obtain marketing approval of their drug
candidates. Once a drug candidate has displayed sufficient pre-clinical 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. 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.

For instance, early clinical results seen with ublituximab (TG-1101) and/or umbralisib (TGR-1202) in a small number of patients may
not be reproduced in expanded or larger clinical trials such as in our UNITY-CLL, UNITY-NHL or the ULTIMATE I and II trials. Individually
reported  outcomes  of  patients  treated  in  clinical  trials  may  not  be  representative  of  the  entire  population  of  treated  patients  in  such  studies.
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. In addition, early clinical
trial  results  from  interim  analysis  or  from  the  review  of  a  Data  Safety  Monitoring  Board  (DSMB)  or  similar  safety  committee  may  not  be
reflective of the safety or efficacy results of the entire study, when completed. Clinical trial results can change over time as additional patients
are added to a study or as additional follow-up is conducted, which may result in a material negative impact on the preliminary results. For
instance,  we  recently  announced  that  the  Marginal  Zone  Lymphoma  (MZL)  and  the  Follicular  Lymphoma  (FL)  cohorts  of  the  UNITY-NHL
study met the primary endpoint of overall response rate (ORR), falling within our target range which was between 40%-50%, and while we
believe  that  the  ORR  results  have  the  potential  to  increase  over  time  within  this  range,  or  beyond,  as  patients  continue  to  be  followed,  no
assurance can be given that this will be the case, and the results may ultimately fall at the lower end of the range. Further, time to event based
endpoints such as duration of response (DOR) and progression free survival (PFS) have the potential to change, sometimes drastically, with
longer follow-up. No assurance can be provided that the ORR, DOR and PFS data from the MZL and FL cohorts of the UNITY-NHL study will
be supportive of an FDA approval or will support broad market uptake based on the profile of competitor drugs which may be available. While
the  MZL  and  FL  cohorts  of  the  UNITY-NHL  study  met  their  primary  endpoint,  each  cohort  of  this  study  is  operated  and  analyzed
independently, and no assurance can be given that other cohorts from the UNITY-NHL study, including the MCL cohort, the DLBCL cohort, or
the  Small  Lymphocytic  Lymphoma  (SLL)  patients  enrolled  within  the  FL/SLL  cohort  will  meet  their  primary  endpoint,  have  a  positive
outcome, or will be supportive of an FDA filing.

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 contract research
organizations  (CROs)  and  clinical  research  sites  in  conducting  our  studies  internationally.  Nevertheless,  the  risk  of  fraud,  misconduct,
incompetence,  unexpected  patient  variability  and  other  issues  affecting  the  quality  and  the  outcome  of  our  Phase  3  and  registration-directed
studies could arise from U.S. or international sites. If that were to occur, the study could be negatively impacted, potentially even preventing it
from being useful for regulatory approval. If such event were to occur, it would have a substantial negative impact on our business.

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Many  of  the  results  reported  in  our  early  clinical  trials  rely  on  local  investigator-assessed  safety  and  efficacy  outcomes  which  may
differ from results assessed in a blinded, independent, centrally reviewed manner, often required of adequate and well-controlled registration-
directed clinical trials which may be undertaken at a later date. All of our current Phase 3 and registration-directed studies such as UNITY-CLL,
UNITY-NHL and the ULTIMATE I and II trials utilize blinded, independent, central review to assess the primary endpoint of such studies. If
the results from interim analyses are not consistent with final results or results from our registration-directed trials are different from the results
found  in  the  earlier  studies  of  ublituximab  and  umbralisib,  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. For example, in January
2019, we presented to the FDA, interim results from the MZL cohort of our UNITY-NHL trial that supported the granting of Breakthrough
Therapy Designation (BTD). These interim results were also presented at the 2019 American Association of Cancer Research (AACR) annual
meeting,  2019  American  Society  of  Clinical  Oncology  (ASCO)  annual  meeting,  and  the  2019  International  Conference  on  Malignant
Lymphoma (ICML).  In October 2019, we announced that the FL cohort of the UNITY-NHL trial met our target range for overall response rate
based on interim preliminary data.  No assurance can be given that the final results from the MZL cohort or FL cohort will reflect the activity
seen in these interim results, or that the final results will be sufficient to file for accelerated approval for umbralisib for the treatment of MZL
and FL, and if filed that umbralisib will receive accelerated approval. Similarly, while early Phase 1 data for umbralisib and ublituximab alone
and  together  looked  promising  there  is  no  assurance  that  the  UNITY-CLL  trial  will  be  positive.  Moreover,  while  we  believe  one  of  the  key
differentiators for umbralisib is its tolerability and side effect profile compared to other drugs in the same class, no assurance can be given that a
differentiated safety and tolerability profile will be realized in our Phase 3 or registration-directed trials such as UNITY-CLL or UNITY-NHL.
Specifically,  we  have  not  yet  assessed  the  final  safety  data  from  the  MZL  or  FL  cohorts  of  the  UNITY-NHL  study  as  patients  continue  on
therapy,  therefore  there  can  be  no  assurance  given  that  the  final  safety  data,  once  fully  analyzed,  will  be  consistent  with  prior  safety  data
presented  on  umbralisib,  will  be  differentiated  from  other  similar  agents  in  the  same  class,  or  that  it  will  be  favorable  enough  to  support
regulatory approval. In addition, no assurance can be given that new toxicities, or an increase in the severity or frequency of previously seen
toxicities, will not be observed, which could have a material negative impact on the approvability or marketability of umbralisib or any of our
product  candidates.  Finally,  while  the  Phase  2  data  for  ublituximab  in  MS  looked  promising,  no  assurance  can  be  given  that  the  safety,
tolerability and efficacy profile will carry into Phase 3 and that the ULTIMATE I and II clinical trials will be positive.

In addition to umbralisib and ublituximab, we have a number of compounds in early clinical development, such as cosibelimab, TG-
1701 and TG-1801. 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 umbralisib and/or ublituximab.

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 drug candidates.

Our drug candidates umbralisib and ublituximab are in several Phase 3 and registration-directed clinical trials such as UNITY-CLL,
UNITY-NHL and ULTIMATE I and II. Despite promising early results, as with all clinical trials, the risk of failure for our drug candidates is
high.  It  is  impossible  to  predict  when  or  if  any  of  our  drug  candidates  will  prove  effective  and  safe  in  humans  or  will  receive  regulatory
approval or will have a differentiated safety and tolerability profile. Before obtaining marketing approval from regulatory authorities for the
sale  of  any  drug  candidate,  we  must  complete  pre-clinical  studies  and  then  conduct  extensive  clinical  trials  to  demonstrate  the  safety  and
efficacy of our drug candidates in humans. Clinical testing is expensive, difficult to design and implement, can take many years to complete and
is  uncertain  as  to  outcome.  A  failure  of  one  or  more  clinical  trials  can  occur  at  any  stage  of  testing.  Accordingly,  our  current  Phase  3  and
registration-directed trials, such as UNITY-CLL, UNITY-NHL and ULTIMATE I and II and future clinical trials may not be successful.

Successful  completion  of  our  clinical  trials  is  a  prerequisite  to  submitting  an  NDA,  or  a  BLA  to  the  U.S.  FDA  and  a  Marketing
Authorization Application (MAA), in the European Union for each drug candidate and, consequently, the ultimate approval and commercial
marketing  of  our  drug  candidates.  We  do  not  know  whether  any  of  our  on-going  or  future  clinical  trials  for  our  drug  candidates  will  be
completed on schedule, if at all.

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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 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 during, or as a result of, any current or future clinical trials that
we may conduct that could delay or prevent our ability to receive marketing approval or commercialize our drug 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;

● health  authorities  or  institutional  review  boards  (IRBs),  or  ethics  committees  may  not  authorize  us  or  our  investigators  to

commence a clinical trial or conduct a clinical trial at a prospective trial site or 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 health 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 health authorities or IRBs or ethics committees 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 drug candidates may be greater than we anticipate;
● the supply or quality of our drug candidates or other materials necessary to conduct clinical trials of our drug candidates may be
insufficient or inadequate, including, without limitation, as a result of disruptions to our supply chains caused by the Coronavirus
(COVID-19) and related work stoppages across China, South Korea, and potentially other parts of the world; and

● our drug candidates may have undesirable side effects or other unexpected characteristics, causing us or our investigators, health
authorities, IRBs or ethics committees to suspend or terminate the trials, or reports may arise from pre-clinical or clinical testing
of other cancer therapies that raise safety or efficacy concerns about our drug candidates.

We 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 health 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 DSMBs for the UNITY-CLL and UNITY-
NHL  studies  meet  regularly  to  review  ongoing  safety  from  these  studies,  in  an  unblinded  manner  if  applicable,  and  may  recommend
modification to the study design or closure of the study entirely based on their interpretation of the benefit/risk of the study.  While we develop
charters  that  guide  the  nature  of  the  DSMBs  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 our ongoing studies, this does not
mean the safety profile of these studies 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 drug candidates. Further, the FDA may disagree with our clinical trial design and our interpretation of data from
clinical trials, or may change the requirements for approval even after it has reviewed and commented on the design for our clinical trials. This
could happen even for a protocol that has received a Special Protocol Assessment (SPA). In September 2015, we announced a Phase 3 clinical
trial  for  the  combination  of  ublituximab  plus  umbralisib  for  patients  with  chronic  lymphocytic  leukemia  (CLL),  which  is  being  conducted
pursuant  to  an  SPA  with  the  FDA  and  in  August  2017  we  announced  an  SPA  for  our  registration  program  for  ublituximab  in  RMS.  Many
companies which have been granted SPAs have ultimately failed to obtain final approval to market

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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 SPA will have to be reviewed and approved by the FDA
to verify that the SPA agreement is still valid. The FDAs willingness to agree to changes or amendments to a protocol or statistical analysis plan
under SPA agreement is wholly within their discretion.  Such re-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 routine protocol
changes or modifications for any study we conduct under 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. While UNITY-CLL is being operated in
a blinded manner, it is an open label study; 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,  while  the  ULTIMATE  1  and  2  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 prior to making its
final decision.

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 drug candidates;
● not obtain marketing approval at all;
● obtain approval for indications or patient populations that are not as broad as intended or desired;
● be subject to post-marketing testing requirements; 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. 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.  We  do  not  know  whether  any  of  our  clinical  trials  will  begin  as  planned,  will  need  to  be  restructured  or  will  be
completed on schedule, or at all. 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. UNITY-
CLL is an event-driven study, which means the study can only end when a certain pre-specified number of events have occurred. In the case of
UNITY-CLL,  an  event  is  defined  as  disease  progression  or  death.  Given  that  these  events  cannot  be  predicted  with  certainty,  predicting
accurately when this study will reach a sufficient number of events is impossible. We have stated we believe the number of events to conduct an
efficacy analysis can be reached by the end of the first quarter of 2020 or at some point in 2020 but there can be no assurance that this will
occur  and  timelines  for  this  analysis  and  for  the  completion  of  this  study  should  not  be  relied  upon  given  this  inherent  uncertainty.    Delays
beyond the first quarter of 2020 could have a material and adverse impact on the Company. Significant clinical trial delays also could shorten
any periods during which we may have the exclusive right to commercialize our drug candidates or allow our competitors to bring products to
market before we do and impair our ability to successfully commercialize our drug candidates. Any delays in our pre-clinical or future clinical
development programs may harm our business, financial condition and prospects significantly.

In addition, principal investigators for our clinical trials may serve as scientific advisors or consultants to us from time to time and
receive cash or equity 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 FDAs willingness to accept such data,
may be jeopardized.

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The sufficiency of our clinical trial results for accelerated approval are subject to the FDA’s discretion.

We have and will continue to explore strategies for ublituximab and/or umbralisib that involve use of the FDA’s accelerated approval
pathway. Obtaining accelerated approval for an agent requires demonstration of meaningful benefit over all available therapies for a serious
condition.  While  we  believe  we  have  an  understanding  of  what  is  considered  available  therapy  today,  ultimately  the  determination  of  what
constitutes available therapy is wholly up to the FDA and is subject to change. No assurance can be given that other agents will not receive full
approval prior to our potential receipt of accelerated approval. If that were to occur, no assurance can be given that we would be successful in
proving meaningful benefit over those later approved drugs. If we were unable to prove meaningful benefit over any such agents, we would be
effectively blocked from receiving accelerated approval. We announced that we are planning to file the results from the MZL and FL cohorts
from our UNITY-NHL trial for accelerated approval. No assurance can be given that umbralisib will obtain accelerated approval for either MZL
or  FL  for  a  variety  of  reasons,  including,  without  limitation,  if  we  are  unable  to  demonstrate  meaningful  benefit  over  a  currently  approved
agent/regimen  or  any  new  treatment,  if  any,  that  receives  full  approval  prior  to  our  potential  receipt  of  accelerated  approval.  Previously,  we
were hopeful to utilize the results from our GENUINE study for accelerated approval but the intervening full approval of a new therapy for the
treatment of relapsed/refractory CLL has made that potential application more challenging. In October 2019, we announced that final results
from the GENUINE study demonstrated improved progression-free survival for the combination arm compared to ibrutinib alone.  Despite this
positive  outcome,  no  assurance  can  be  given  that  a  filing  based  on  the  GENUINE  results  will  ever  be  made,  or  if  made  would  result  in  a
favorable review by regulatory authorities.

Finally, if any of our drugs were ever to receive accelerated approval, we would be required to conduct a post-market confirmatory
study,  which  we  may  not  complete,  or  if  completed,  may  prove  unsuccessful.  In  such  instance,  the  FDA  can  remove  the  product  from  the
market.

Our drug candidates may cause undesirable side effects that could delay or prevent their regulatory approval, limit the commercial profile
of an approved label, or result in significant negative consequences following marketing approval, if any.

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. 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 with a
significantly larger number of patients exposed to the drug candidate in Phase 3 or registration-directed trials and on the market.

We are currently running our Phase 3 and registration-directed trials, such as UNITY-CLL, UNITY-NHL and ULTIMATE I and II and
have not completed testing of any of our product candidates for the treatment of the indications for which we intend to seek product approval in
humans, and we currently do not know the extent that the adverse events, if any, will be observed in patients who receive any of our product
candidates. To date, clinical trials using ublituximab and umbralisib have demonstrated a toxicity profile that was deemed acceptable by the
investigators performing such studies. Such interpretation may not be shared by future investigators or by the health authorities and in the case
of ublituximab and umbralisib, even if deemed acceptable for oncology and/or autoimmune indications, it may not be acceptable for diseases
outside  the  oncology  and  autoimmune  settings,  and  likewise  for  any  other  product  candidates  we  may  develop.  Additionally,  the  severity,
duration  and  incidence  of  adverse  events  may  increase  in  larger  study  populations  such  as  found  in  our  on-going  Phase  3  and  registration-
directed  trials.  Particularly,  with  respect  to  umbralisib,  although  over  1,500  patients  have  been  dosed  in  umbralisib  studies  to  date,  the  full
adverse effect profile of umbralisib is not known. As additional patients are exposed for longer durations to umbralisib, it is unknown whether
greater frequency and/or severity of adverse events are likely to occur. Common toxicities of other drugs in the same class as umbralisib include
high levels of liver toxicity, infections and colitis, the latter of which notably has presented with later onset, with

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incidence increasing with duration of exposure. No assurance can be given that an acceptable safety and tolerability profile for umbralisib will
continue  to  be  demonstrated  in  the  future  with  longer  durations  of  exposure,  at  the  fixed  800mg  dose  being  evaluated  in  our  registration-
directed trials and in multiple drug combinations. 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.

Additionally, in drug-combination clinical development, there is an inherent risk of drug-drug interactions between combination agents
which may affect each component’s individual pharmacologic properties and the overall efficacy and safety of the combination regimen. Both
ublituximab and umbralisib 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.

If  any  of  our  drug  candidates  receive  marketing  approval  and  we  or  others  later  identify  undesirable  or  unacceptable  side  effects
caused  by  such  drug  candidates  (or  any  other  similar  drugs)  after  such  approval,  a  number  of  potentially  significant  negative  consequences
could result, including:

● regulatory authorities may withdraw or limit their approval of such drug candidates;
● regulatory authorities may require a more significant clinical benefit for approval to offset the risk;
● regulatory authorities may require the addition of labeling statements, including warnings, contra-indications, or precautions, that

could diminish the usage of the product or otherwise limit the commercial success of the affected product;

● we may be required to create a medication guide outlining the risks of such side effects for distribution to patients;
● 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), plan to mitigate risks, which could include
medication guides, 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 drug candidates; and
● our reputation may suffer.

Any  one  or  a  combination  of  these  events  could  prevent  us  from  obtaining  or  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.

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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,  storage,  record-keeping,  advertising,  promotion,  import,  export,  marketing  and
distribution of our product candidates or any future product candidates are subject to extensive regulation by the FDA in the United States and
by comparable health 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  BLA  and  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 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-approval clinical trials or studies which also may be costly. The FDA approval for a
limited indication or approval with required warning language, such as a box warning, could significantly impact our ability to successfully
market  our  product  candidates.  Finally,  the  FDA  may  require  adoption  of  a  REMS  requiring  prescriber  training,  post-market  registries,  or
otherwise restricting 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 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. 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 a lengthy
and challenging process. 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 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 safe and effective for an indication;

● the FDA may not accept clinical data from trials conducted by individual investigators or in countries where the standard of care

is potentially different from 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  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 submission or to obtain regulatory approval in the United States or elsewhere;

● 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.

In addition, raising questions about the safety of marketed pharmaceuticals may result in increased cautiousness by the FDA and other
regulatory  authorities  in  reviewing  new  pharmaceuticals  based  on  safety,  efficacy  or  other  regulatory  considerations  and  may  result  in
significant  delays  in  obtaining  regulatory  approvals.  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.

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A  breakthrough  therapy  designation  by  the  FDA  for  our  drug  candidates,  including  umbralisib  for  the  treatment  of  adult  patients  with
relapsed  or  refractory  Marginal  Zone  Lymphoma  who  have  received  at  least  one  prior  treatment  including  an  anti-CD20  monoclonal
antibody, may not lead to a faster development or regulatory review or approval process, and it does not ensure that our drug candidates will
receive marketing approval.

In January 2019, the FDA granted breakthrough therapy designation (also referred to as BTD) to umbralisib for the treatment of adult
patients with relapsed or refractory MZL who have received at least one prior treatment including an anti-CD20 monoclonal antibody. We may
also seek breakthrough therapy designation for some of our other drug candidates. A breakthrough therapy is defined as a drug that is intended,
alone  or  in  combination  with  one  or  more  other  drugs,  to  treat  a  serious  or  life-threatening  disease  or  condition,  and  preliminary  clinical
evidence  indicates  that  the  drug  may  demonstrate  substantial  improvement  over  existing  therapies  on  one  or  more  clinically  significant
endpoints,  such  as  substantial  treatment  effects  observed  early  in  clinical  development.  Our  breakthrough  therapy  designation  was  based  on
interim data from the MZL cohort of the UNITY-NHL clinical trial. No assurance can be given that the full results from the MZL cohort of the
UNITY-NHL clinical trial will support accelerated approval.

For drugs that have been designated as breakthrough therapies, interaction and communication between the FDA and the sponsor of
the trial can help to identify the most efficient path for clinical development while minimizing the number of patients who may be placed in
potentially less effective control regimens. Drugs designated as breakthrough therapies by the FDA are also eligible for accelerated approval.
Designation as a breakthrough therapy is wholly within the discretion of the FDA. Accordingly, even if we believe one of our drug candidates
meets the criteria for designation as a breakthrough therapy, the FDA may disagree and instead determine not to grant such designation to the
drug  candidate.  In  any  event,  the  receipt  of  a  breakthrough  therapy  designation  for  a  drug  candidate  may  not  result  in  a  faster  development
process,  review  or  approval  compared  to  drugs  considered  for  approval  under  conventional  FDA  procedures  and  does  not  assure  ultimate
approval by the FDA. In addition, even if one or more of our drug candidates qualify as breakthrough therapies, the FDA may later decide that
the drugs no longer meet the conditions for qualification and rescind the designation.

A fast track designation by the FDA may not actually lead to a faster development or regulatory review or approval process.

We may seek fast track designation for some of our other drug candidates. 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 drug sponsor may apply for
fast track designation. The FDA has broad discretion whether or not to grant this designation, so even if we believe a particular drug candidate
is eligible for this designation, we cannot assure you that the FDA would decide to grant it. Even if we receive fast track designation for our
other drug candidates, we may not experience a faster development process, review or approval compared to conventional FDA procedures.
The FDA may withdraw fast track designation if it believes that the designation is no longer supported by data from our clinical development
program.

While we have received orphan drug designation for umbralisib and ublituximab for specified indications, we may seek additional orphan
drug  designation  for  those  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 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 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 and all three types of MZL (nodal,
extranodal  and  splenic)  in  April  2019,  and  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. As part of our business strategy, we may seek
orphan drug designation for our other drug candidates, and 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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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  later
determines that the request for designation was materially defective or if the manufacturer is unable to assure sufficient quantity of the drug to
meet  the  needs  of  patients  with  the  rare  disease  or  condition.  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.

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 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.

As all of our product candidates are still under development, manufacturing site additions, scale-up and process improvements implemented
in the production of those product candidates may affect their ultimate activity or function.

Our product candidates are in the initial stages of development and 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 Phase 3 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 also can 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 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 no clinical differences between these drug products, which could substantially impact the approvability of the U2 combination
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.

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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  umbralisib  to  meet  expanded  clinical  trial  and  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  umbralisib  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,  as  we  move  closer  to  commercialization  for  ublituximab  and  umbralisib  we  will  need  to  scale-up  production  to  ensure
adequate  commercial  supply.  We  are  currently  in  the  process  of  scaling  up  ublituximab.  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 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.

Risks Related to Commercialization

The incidence and prevalence for target patient populations of our drug candidates have not been established with precision. If the market
opportunities for our drug 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  CLL,  relapsed/refractory  MZL,  relapsed/refractory  FL  and  multiple  sclerosis  (MS)are
unknown. Our projections of both the number of people who are affected by disease within our target indications, as well as the subset of these
people who have the potential to benefit from treatment with our product candidates, are based on our beliefs and estimates. Our beliefs are
typically  based  on  one  on  one  and  group  interactions  with  target  physicians  and  our  estimates  have  been  derived  from  a  variety  of  sources,
including the scientific literature, healthcare utilization databases and market research, and may prove to be incorrect. Further, new studies may
change the estimated incidence or prevalence of these diseases.

The total addressable market opportunity for umbralisib and ublituximab for the treatment of patients with CLL, MZL, FL and MS
will ultimately depend upon, among other things, the final label indication, approval for sale for these indications, acceptance by the medical
community,  patient  access,  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 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.

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 marketing
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 less expensive 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. 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
effectiveness of any related companion diagnostic tests, the level of generic competition and the availability of reimbursement from government
and other third-party payors.

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 CLL, if U2 is approved, we expect U2 to compete with recently approved drugs such as ibrutinib (AbbVie
and  Janssen),  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 two
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,  if  approved,  we  expect  umbralisib  to  compete  with  ibrutinib  (AbbVie  and
Janssen)  and  established  treatments  such  as  rituximab  and  several  generically  available  chemotherapies.  Additionally,  in  May
2019, the FDA approved the combination of rituximab and lenalidomide (Bristol-Myers) for the treatment of previously treated
MZL.

● For the treatment of Follicular Lymphoma, if approved, we expect umbralisib to compete with recently approved drugs such as
obinutuzumab  (Roche),  idelalisib  (Gilead),  copanlisib  (Bayer),  and  duvelisib  (Verastem),  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. In addition, in May 2019, the FDA approved the combination of rituximab and
lenalidomide  (Bristol-Myers)  for  the  treatment  of  previously  treated  FL.  There  are  also  several  PI3K  delta  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 umbralisib.

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 is one anti-
CD20 monoclonal antibody approved, ocrelizumab (Roche), and another in Phase 3 development, ofatumumab (Novartis), which
is expected to enter the market in the next 12-24 months.

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.

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.

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

● decreased demand for any drug candidates that we may develop;
● 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 drug 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.  We
anticipate  that  we  will  need  to  increase  our  insurance  coverage  if  we  successfully  commercialize  any  drug  candidate.  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.

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

Even  if  our  product  candidates  receive  regulatory  approval,  they  may  not  gain  market  acceptance  among  physicians,  patients,
healthcare payors, and the medical community. Commercial success also will depend, in large part, on the coverage and reimbursement of our
product candidates by third-party payors, including private insurance providers and government payors. The degree of market acceptance of
any approved product would depend on a number of factors, including:

● the efficacy, safety and tolerability as demonstrated in clinical trials;
● the timing of market introduction of such product candidate as well as competitive products;
● the clinical indications for which the product is approved;
● acceptance by physicians, major operators of cancer clinics and patients of the product as a safe, tolerable and effective treatment;
● the potential and perceived advantages of the product candidate over alternative treatments;
● the safety and tolerability of the product candidate in a broader patient group;
● the cost of treatment in relation to alternative treatments;
● the availability of adequate reimbursement and pricing by third parties and government authorities;
● changes in regulatory requirements by government authorities for the product candidate;
● relative convenience and ease of administration;
● the prevalence and severity of side effects and adverse events;
● the effectiveness of our sales and marketing efforts; and
● unfavorable publicity relating to the product.

If any product candidate is approved but does 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.

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Even if we are able to commercialize any drug candidates, such drugs 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 drug candidate 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 drug candidates, even if our drug candidates obtain marketing approval.  In addition, if we are
successful in receiving 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  drug  candidates  successfully  also  will  depend  in  part  on  the  extent  to  which  coverage  and
reimbursement for these drug candidates 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 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.  We  cannot  be  sure  that  coverage  will  be  available  for  any  drug
candidate that we commercialize and, if coverage is available, the level of reimbursement. Reimbursement may impact the demand for, or the
price of, any drug candidate for which we obtain marketing approval. If reimbursement is not available or is available only to limited levels, we
may not be able to successfully commercialize any drug candidate for which we obtain marketing approval.

There may be significant delays in obtaining reimbursement for newly approved drugs, and coverage may be more limited than the
purposes  for  which  the  drug  is  approved  by  the  FDA  or  similar  regulatory  authorities  outside  the  United  States.  Moreover,  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. Reimbursement rates may vary according to the use of the drug and the clinical setting in which it is used, may be
based on reimbursement levels already set for lower-cost drugs and may be incorporated into existing payments for other services. 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  than  in  the  United  States.
Third-party payors often rely upon Medicare coverage policy and payment limitations in setting their own reimbursement policies. Our inability
to  promptly  obtain  coverage  and  profitable  payment  rates  from  both  government-funded  and  private  payors  for  any  approved  drugs  that  we
develop could have a material adverse effect on our operating results, our ability to raise capital needed to commercialize drugs and our overall
financial condition.

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  to  the
healthcare system that could impact our ability to sell our products profitably. In particular, the Medicare Modernization Act of 2003 revised the
payment  methodology  for  many  products  reimbursed  by  Medicare,  resulting  in  lower  rates  of  reimbursement  for  many  types  of  drugs,  and
added  a  prescription  drug  benefit  to  the  Medicare  program  that  involves  commercial  plans  negotiating  drug  prices  for  their  members.  Since
2003, there have been a number of other legislative and regulatory changes to the coverage and reimbursement landscape for pharmaceuticals. 

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 United States healthcare system. The ACA and any revisions or
replacements of that Act, any substitute legislation, and other changes in the law or regulatory framework could have a material adverse effect
on our business.

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

● an annual, nondeductible fee on any entity that manufactures or imports specified branded prescription drugs and biologic agents,

apportioned among these entities according to their market share in certain government healthcare programs;

● an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program to 23.1% and

13.0% of the average manufacturer price for branded and generic drugs, respectively;

● expansion of healthcare fraud and abuse laws, including the federal False Claims Act and the federal Anti-Kickback Statute, new

government investigative powers and enhanced penalties for non-compliance;

● a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 50% point-of-sale discounts
off  negotiated  prices  of  applicable  brand  drugs  to  eligible  beneficiaries  during  their  coverage  gap  period,  as  a  condition  for  a
manufacturer’s  outpatient  drugs  to  be  covered  under  Medicare  Part  D  (subsequent  legislation  increased  this  amount  to  70%
effective as of January 1, 2019);

● extension of a manufacturer’s Medicaid rebate liability to covered drugs dispensed to individuals who are enrolled in Medicaid

managed care organizations;

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

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

● the new requirements under the federal Open Payments program and its implementing regulations;
● a new requirement to annually report drug samples that manufacturers and distributors provide to physicians;
● a  new  regulatory  pathway  for  the  approval  of  biosimilar  biological  products,  all  of  which  will  impact  existing  government

healthcare programs and will result in the development of new programs; and

● a  new  Patient-Centered  Outcomes  Research  Institute  to  oversee,  identify  priorities  in,  and  conduct  comparative  clinical

effectiveness research, along with funding for such research.

Certain  provisions  of  the  ACA  have  been  subject  to  judicial  challenges  as  well  as  efforts  to  release  or  replace  them  or  to  alter  the
interpretation or implementation.  For example, at the end of 2017, Congress passed the Tax Cuts and Jobs Act (Tax Act), which repealed the
penalty for individuals who fail to maintain minimum essential health coverage as required by the ACA, 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  as  part  of  the  Tax  Act;  and  (ii)  that  the
individual mandate is not severable from the rest of the ACA and, as a result, the ACA in its entirety is invalid. In December 2019, the Fifth
Circuit Court of Appeals upheld the district court’s decision that the individual mandate is unconstitutional, but remanded the case back to the
district court to reconsider the severability question.  It is unclear how the ultimate decision in this case, or other efforts to repeal, replace, or
invalidate the ACA or its implementing regulations, or portions thereof, will affect the ACA or our business.  Other attempts have been made in
Congress  to  modify  or  repeal  all  or  certain  provisions  of  the  ACA,  and  we  anticipate  that  there  may  be  further  efforts  to  repeal,  replace  or
invalidate the ACA, which could affect our business and operations.

The Bipartisan Budget Act of 2018, the BBA, which set government spending levels for Fiscal Years 2018 and 2019, revised certain
provisions  of  the  ACA.  Specifically,  beginning  in  2019,  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%, ultimately increasing the liability for brand drug manufacturers.
Further, this mandatory manufacturer discount applied to biosimilars beginning in 2019.  

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  is
currently  assessing  additional  proposals  that  are  designed  to  affect  drug  pricing,  such  as  tying  U.S.  drug  prices  to  prices  outside  the  United
States. Congress and the Trump administration have each indicated that it will continue to seek new legislative and/or administrative measures
to control drug costs.  Most recently, President Trump signed into law the U.S.-Mexico-Canada (USMCA) trade agreement.  As enacted, there
are  no  commitments  with  respect  to  biologic  product  intellectual  property  rights  or  data  protection,  which  may  create  an  unfavorable
environment across the three countries.

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The  116th  Congress  has  explored  legislation  intended  to  address  the  cost  of  prescription  drugs.  Notably,  the  major  committees  of
jurisdiction in the Senate (Finance Committee, Health, Education, Labor and Pensions Committee, and Judiciary Committee) have marked up
legislation intended to address various elements of the prescription drug supply chain. Proposals include a significant overhaul of the Medicare
Part D benefit design, addressing patent loopholes, and efforts to cap increases in drug prices. The House Energy and Commerce Committee
approved drug-related legislation intended to increase transparency of drug prices and also curb anti-competitive behavior in the pharmaceutical
supply chain. In addition, the House Ways and Means Committee approved legislation intended to improve drug price transparency, including
for drug manufacturers to justify certain price increases.  On December 12, 2019, the House of Representatives passed broad legislation that
would, among other provisions, require the Department of Health and Human Services (HHS) to negotiate drug prices and impose price caps.
 Failure by a manufacturer to reach an agreement with HHS on the negotiated price could result in significant penalties for prescription drug
manufacturers.    While  we  cannot  predict  what  proposals  may  ultimately  become  law,  the  proposals  under  consideration  could  significantly
change the landscape in which the pharmaceutical market operates. 

The Trump Administration has also taken several regulatory steps to redirect ACA implementation. HHS finalized Medicare fee-for-
service hospital payment reductions for Part B drugs acquired through the 340B Drug Pricing Program, which remains subject to ongoing legal
challenge. HHS also has signaled its intent to continue to pursue reimbursement policy changes for Medicare Part B drugs as a whole that likely
would reduce hospital and physician reimbursement for these drugs.

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

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

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

Legislative  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.

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

● 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.

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

We  cannot  predict  the  likelihood,  nature  or  extent  of  how  government  regulation  that  may  arise  from  future  legislation  or
administrative or executive action taken by the U.S. presidential administration may impact our business and industry. In particular, the U.S.
President has taken several executive actions, including the issuance of a number of Executive Orders, that could impose significant burdens on,
or otherwise materially delay, the FDA’s ability to engage in routine regulatory and oversight activities such as implementing statutes through
rulemaking, issuance of guidance, and review and approval of marketing applications. Notably, on January 23, 2017, President Trump ordered a
civilian hiring freeze for all executive departments and agencies, including the FDA, which prohibits the FDA from filling employee vacancies
or creating new positions. Under the terms of the order, the freeze was to remain in effect until implementation of a plan to be recommended by
the Director for the Office of Management and Budget (OMB) in consultation with the Director of the Office of Personnel Management, to
reduce the size of the federal workforce through attrition. An under-staffed FDA could result in delays in FDA’s responsiveness or in its ability
to review submissions or applications, issue regulations or guidance or implement or enforce regulatory requirements in a timely fashion or at
all. This hiring freeze was lifted later in 2017. Moreover, on January 30, 2017, President Trump issued an Executive Order, applicable to all
executive agencies, including the FDA, which requires that for each notice of proposed rulemaking or final regulation to be issued in fiscal year
2017, the agency shall identify at least two existing regulations to be repealed, unless prohibited by law. These requirements are referred to as
the  two-for-one  provisions.  This  Executive  Order  includes  a  budget  neutrality  provision  that  requires  the  total  incremental  cost  of  all  new
regulations in the 2017 fiscal year, including repealed regulations, to be no greater than zero, except in limited circumstances. For fiscal years
2018  and  beyond,  the  Executive  Order  requires  agencies  to  identify  regulations  to  offset  any  incremental  cost  of  a  new  regulation  and
approximate the total costs or savings associated with each new regulation or repealed regulation. In interim guidance issued by the Office of
Information and Regulatory Affairs within OMB on February 2, 2017, the administration indicates that the two-for-one provisions may apply
not  only  to  agency  regulations,  but  also  to  significant  agency  guidance  documents.  It  is  difficult  to  predict  how  these  requirements  will  be
implemented, and the extent to which they will impact the FDA’s ability to exercise its regulatory authority. If these executive actions impose
constraints  on  the  FDA’s  ability  to  engage  in  oversight  and  implementation  activities  in  the  normal  course,  our  business  may  be  negatively
impacted. 

In addition, on October 12, 2017, the President released an Executive Order intended to promote health care choices and competition
and on June 24, 2019, the President released an Executive Order intended to improve price transparency and quality transparency. These may
push HHS, FDA, and other relevant agencies to engage in rulemaking that may impact the pharmaceutical industry.

If, in the future, we are unable to establish 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 drug candidates if and when they are approved, and we may not be
able to generate any revenue.

We do not currently have a sales or marketing infrastructure and have limited experience in the sale, marketing or distribution of drugs.
To achieve commercial success for any approved drug candidate for which we retain sales and marketing responsibilities, we must build our
sales,  marketing,  managerial,  and  other  non-technical  capabilities  or  make  arrangements  with  third  parties  to  perform  these  services.  In  the
future, we may choose to build a focused sales and marketing infrastructure to sell, or participate in sales activities with our collaborators for,
some of our drug candidates if and when they are approved.

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In advance of FDA approval of our first product, we will need to make significant investments to build a commercial organization and
infrastructure.  We  will  need  to  hire  a  sales  force  and  commercial  support  personnel,  in  order  to  build  processes  and  systems  to  support  a
commercial  launch  prior  to  knowing  whether  our  product  will  receive  FDA  approval.  It  is  possible  that  the  FDA  approval  is  unexpectedly
delayed or our product is not approved 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  and  marketing  capabilities  and  entering  into  arrangements  with  third
parties to perform these services. 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 drug candidate for which we recruit a sales force and establish marketing capabilities is delayed or does
not occur for any reason, we would have prematurely or unnecessarily incurred these commercialization expenses. This may be costly, and our
investment would be lost if we cannot retain or reposition our sales and marketing personnel.

Factors that may inhibit our efforts to commercialize our drug candidates on our own include:

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

● unforeseen costs and expenses associated with creating a sales and marketing organization.

If  we  enter  into  arrangements  with  third  parties  to  perform  sales,  marketing  and  distribution  services,  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  drug  candidates  that  we  develop
ourselves. In addition, we may not be successful in entering into arrangements with third parties to sell and market our drug candidates or may
be unable to do so on terms that are favorable to us. 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 drug 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.

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.

Although we do not currently have any drugs on the market, once we begin commercializing our drug candidates, we will be 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,  physicians  and  third-party  payors  play  a  primary  role  in  the
recommendation  and  prescription  of  any  drug  candidates  for  which  we  obtain  marketing  approval.  Our  future  arrangements  with  third-party
payors and customers 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

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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 federal physician payment transparency requirements, sometimes referred to as the Sunshine Act under the Affordable Care
Act require manufacturers of drugs, devices, biologics and medical supplies that are reimbursable under Medicare, Medicaid, or
the  Children’s  Health  Insurance  Program  to  report  to  the  Department  of  Health  and  Human  Services  information  related  to
physician  payments  and  other  transfers  of  value  and  the  ownership  and  investment  interests  of  such  physicians  and  their
immediate family members;

● 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;

● federal  consumer  protection  and  unfair  competition  laws,  which  broadly  regulate  marketplace  activities  and  activities  that

potentially harm consumers; and

● analogous  state  laws  and  regulations,  such  as  state  anti-kickback  and  false  claims  laws  that  may  apply  to  sales  or  marketing
arrangements  and  claims  involving  healthcare  items  or  services  reimbursed  by  non-governmental  third-party  payors,  including
private insurers; and some state laws require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary
compliance guidelines and the relevant compliance guidance promulgated by the federal government in addition to requiring drug
manufacturers to report information related to pricing of products or payments to physicians and other health care providers or
marketing expenditures, and governing the privacy and security of health information in certain circumstances, many of which
differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

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.  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 any of the physicians or other providers or entities with whom we
expect to do business is found to be not in compliance with applicable laws, they may be subject to criminal, civil or administrative sanctions,
including exclusions from government-funded healthcare programs.

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,  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

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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;
● fines;
● suspension or withdrawal of marketing or regulatory approvals;
● 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.

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.

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

A pharmaceutical product candidate cannot be marketed in the United States or other countries until we have completed a rigorous and
extensive regulatory review process, including approval of a brand name. Any brand names we intend to use for ublituximab, umbralisib or any
future product candidates will require approval from the FDA regardless of whether we have secured a formal trademark registration from the
United States Patent and Trademark Office (USPTO). The FDA typically conducts a review of proposed product brand names, including an
evaluation  of  potential  for  confusion  with  other  product  names.  The  FDA  may  also  object  to  a  product  brand  name  if  it  believes  the  name
inappropriately  implies  medical  claims.  If  the  FDA  objects  to  any  of  our  proposed  product  brand  names,  we  may  be  required  to  adopt  an
alternative brand name for ublituximab, umbralisib or any future product candidates. If we adopt an alternative brand name, we would lose the
benefit of our existing trademark applications for such product candidate and may be required to expend significant additional resources in an
effort to identify a suitable product brand name that would qualify under applicable trademark laws, not infringe the existing rights of third
parties and be acceptable to the FDA. We may be unable to build a successful brand identity for a new trademark in a timely manner or at all,
which would limit our ability to commercialize ublituximab, umbralisib, or any future product candidates. We do not currently have an agreed
upon brand name for umbralisib, and no assurance can be given that we will obtain one in a timely fashion. Any delay in obtaining a brand
name  for  umbralisib  or  any  other  of  our  drug  candidates  could  delay  approval  and/or  commercialization  and  have  a  negative  impact  on  our
launch and future prospects for umbralisib or any other such drug candidates.

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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. 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. While we
maintain an active IND for ublituximab and umbralisib enabling the conduct of studies in the FDA’s Division of Hematology and Oncology,
and an active IND for ublituximab under the FDA’s Division of Neurology, there can be no assurance that the FDA will allow us to continue the
development of our product candidates in those divisions where we maintain an active IND.

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  out-patient  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 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

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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 drug candidates. As a result, we believe that our financial results and
the commercial prospects for our drug candidates in the subject indication would be harmed, our costs could increase and our ability to generate
revenue could be delayed.

We contract with third parties for the manufacture of our drug candidates for pre-clinical development and clinical trials, and we expect to
continue to do so for commercialization. This reliance on third parties increases the risk that we will not have sufficient quantities of our
drug  candidates  or  drugs  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 or personnel. We
rely, and expect to continue to rely, on third parties for the manufacture of our drug candidates for pre-clinical development and clinical testing,
as well as for the commercial manufacture of our drugs if any of our drug candidates receive marketing approval.  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 drug candidates or drugs 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  must  be  approved  by  the  FDA  or  a  comparable
foreign  regulatory  authority  pursuant  to  inspections  that  may  be  conducted  after  we  submit  our  marketing  applications  to  the  FDA  or  a
comparable foreign regulatory authority. We do not control the manufacturing process of, and will be completely dependent on, our contract
manufacturers for compliance with cGMPs in connection with the manufacture of our drug candidates. If our contract manufacturers cannot
successfully manufacture material that conforms to our specifications and the strict regulatory requirements of the FDA or others, they will not
be able to secure and/or maintain regulatory approval for their manufacturing facilities. In addition, we have no control over the ability of our
contract  manufacturers  to  maintain  adequate  quality  control,  quality  assurance  and  qualified  personnel.  If  the  FDA  or  a  comparable  foreign
regulatory authority does not approve these facilities for the manufacture of our drug candidates or if it withdraws any such approval in the
future, we may need to find alternative manufacturing facilities, which would significantly impact, including causing substantial delay,

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in our ability to develop, obtain regulatory approval for or market our drug candidates.  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  drug  candidates  or  drugs,  operating
restrictions and criminal prosecutions, any of which could significantly and adversely affect our business and supplies of our drug candidates.

For  certain  of  our  drug  candidates,  we  do  not  have  long-term  supply  agreements  with  contract  manufacturers.  For  these  drug
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 drug 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 agreements contain certain minimum purchases in what are commonly referred to as “take or
pay” provisions, and we would expect all future supply agreements to 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.

Any performance failure on the part of our existing or future manufacturers could delay clinical development or marketing approval. 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  drug  candidates  or  drugs  could  result  in
significant delays or gaps in availability of such drug candidates or drugs 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 expect to rely on other third parties to store and distribute drug supplies for our clinical trials. 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.

In  addition,  we  do  not  have  the  capability  to  package  finished  products  for  distribution  to  hospitals  and  other  customers.  Prior  to
commercial  launch,  we  intend  to  enter  into  agreements  with  one  or  more  alternate  packaging  and  labeling  suppliers  so  that  we  can  ensure
proper supply chain management once we are authorized to make commercial sales of our product candidates. If we receive marketing approval
from  the  FDA,  we  intend  to  sell  pharmaceutical  product  finished  and  packaged  by  such  suppliers.  We  have  not  yet  entered  into  long-term
agreements  with  our  fill/finish  suppliers  for  all  of  our  drug  candidates,  and  we  may  be  unable  to  enter  into  such  an  agreement  or  do  so  on
commercially reasonable terms, which could have a material adverse impact upon our business.

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The  third  parties  upon  whom  we  rely  for  the  supply  of  the  active  pharmaceutical  ingredient  (API),  drug  product,  regulatory  starting
materials and intermediates for drug substance and other materials used in our drug candidates are our sole source of supply, and the loss
of any of these suppliers could significantly harm our business.

The  API,  drug  product  and  drug  substance  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 the API, drug product and drug
substance for these drugs in accordance with regulatory requirements and in sufficient quantities for clinical testing and commercialization. If
any  of  our  suppliers  ceases  its  operations  for  any  reason  or  is  unable  or  unwilling  to  supply  API,  drug  product,  drug  substance  and  other
materials 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 most cases, our manufacturing partners are single source suppliers. 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. Given this, any disruption of supply from these partners could have a material, long-term impact on
our ability to supply products for clinical trials or commercial sale. This includes potential disruptions to our supply chains that may be caused
by COVID-19 and related work stoppages across regions impacted by this public health crisis. Ublituximab is manufactured in South Korea,
and  TG-1701 is manufactured in China.We have sufficient inventory of clinical supplies of ublituximab to support our current clinical program
needs.  In addition, we source certain raw materials for umbralisib from China; however, we have sufficient quantities of these raw materials to
meet  our  current  clinical  program  needs  and  our  anticipated  initial  commercial  demand  in  the  event  we  receive  FDA  approval.  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. We continue to monitor the situation very closely with our suppliers in impacted regions. If our suppliers do not deliver
sufficient quantities of our product candidates on a timely basis, or at all, and in accordance with applicable specifications, there could be a
significant interruption of our supply, which would adversely affect clinical development and commercialization of our products. In addition, if
our current or future supply of any of our product candidates should fail to meet specifications during its stability program there could be a
significant interruption of our supply of drug, which would adversely affect the clinical development and commercialization of the product.

For all of our drug candidates, we plan to identify and qualify additional manufacturers and other suppliers to provide such API, drug
product and drug substance prior to or following submission of an NDA or BLA to the FDA and/or an MAA to the EMA. We are not certain,
however, that our single-source suppliers will be able to meet our demand for their products, 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,  or  public  health
emergencies (i.e., COVID-19) or natural disasters that may cause those suppliers to stop work for a period of time.. It may be difficult for us to
assess their ability to timely meet our demand in the future based on past performance.

Establishing additional or replacement suppliers for the API, drug product and drug substance used in our drug candidates, if required,
may not be accomplished quickly or at all and may involve significant expense. If we are able to find a replacement supplier, such replacement
supplier would need to be qualified and require additional regulatory approval, which could result in further delay. While we seek to maintain
adequate  inventory  of  the  API,  drug  product  and  drug  substance  used  in  our  drug  candidates,  any  interruption  or  delay  in  the  supply  of
components or materials, or our inability to obtain such API, drug product and drug substance from alternate sources at acceptable prices in a
timely manner could impede, delay, limit or prevent our development efforts, which could harm our business, results of operations, financial
condition and prospects.

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Because we have in-licensed 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 candidates.

Because we license 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 our
product candidates may be adversely affected. Disputes may arise with the third parties from whom we license our 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 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 candidates, 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 drug
candidate, the costs and complexities of manufacturing and delivering such drug 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 drug 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  drug  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 drug 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 drug candidates or
bring them to market and generate drug revenue.

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 drug 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 our product candidates or any future product candidate that we may license or acquire, 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  drug
candidates, we also rely on our licensors to protect the patent and other intellectual property rights necessary for commercialization of our drug
candidates.  

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 drug 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 drug candidates. 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 drug candidates, including generic versions
of such drugs.

Currently, the composition of matter patent for ublituximab and umbralisib are granted in both the United States and EU, among other
countries. A method of use patent covering the combination of ublituximab and umbralisib has also been granted in the US, EU, Japan, and
several other territories. Additionally, several method of use patents for ublituximab and umbralisib 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

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in the future, for our cosibelimab, TG-1701 and TG-1801 or for our pre-clinical product candidates will be 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  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 U.S. Patent and Trademark Office, or 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 product candidates or any future product candidate we may license or acquire, our ability to develop and
commercialize  these  product  candidates  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.

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 United States 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

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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 United States 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  United  States  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  sufficient  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 drug 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
drug candidates is not sufficiently broad to impede such competition, our ability to successfully commercialize our drug 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 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 drug 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.

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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 drug 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.

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.

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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.

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. For example, Roche, Biogen
Idec, and Genentech hold patents for the use of anti-CD20 antibodies utilized in the treatment of CLL in the United States which expired in
November of 2019. While these patents have been challenged, to the best of our knowledge, those matters were settled in a way that permitted
additional anti-CD20 antibodies to be marketed for CLL. If those patents are still valid and enforced at the time we are intending to launch
ublituximab, then we will need to either prevail in a litigation to challenge those patents or negotiate a settlement agreement with the patent
holders. 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.

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 attorneys 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.

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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.

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.

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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.

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 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 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.

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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 Employee Matters, Managing Growth and Other Risks Related to Our Business

If  we  fail  to  attract  and  keep  key  management  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, clinical, business development, financial and legal expertise of our senior
management team as well as the other principal members of our management, scientific and clinical team. 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  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  drugs.  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  impede  significantly  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.

As of February 14, 2020, we had 134 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 will
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 further develop and commercialize our product candidates and, accordingly,
may not achieve our research, development and commercialization goals.

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  global  financial  crisis  caused  extreme  volatility  and  disruptions  in  the  capital  and  credit  markets.  A  severe  or  prolonged
economic downturn, such as the global financial crisis, 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. The long-term impact of Brexit, including on our business and our industry, will
depend on the terms that are negotiated in relation to the United Kingdom’s future relationship with the European Union during the transition
period which began on Brexit Day and is currently set to end on December 31, 2020.  We are closely monitoring the Brexit developments in
order  to  determine,  quantify  and  proactively  address  changes  as  they  become  clear.  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. 

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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.

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,  natural  disasters,  terrorism,  war  and
telecommunication and electrical failures. While we have not experienced any such system failure, accident, or security breach to date, if such
an event were to occur and cause interruptions in our operations, it could result in a material disruption of our programs. 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.  Furthermore,  in  preparing  for  potential  commercialization  of  our  first  drug  candidate,  we  anticipate  that  our
computer  systems  will  increase  in  magnitude  and  complexity.    Building  the  systems  and  infrastructure  required  for  commercialization  with
appropriate  security  measures  may  be  time  consuming  and  costly.    In  addition,  there  can  be  no  assurance  that  our  efforts  will  prevent
breakdowns  or  breaches  in  our  systems.      To  the  extent  that  any  disruption  or  security  breach  results  in  a  loss  of  or  damage  to  our  data  or
applications or other data or applications relating to our technology or drug candidates, or inappropriate disclosure of confidential or proprietary
information, we could incur financial, legal, business or reputational harm.

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, 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  drugs  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 Cuts and Jobs Act (Tax Act) was signed into law and is generally
effective  after  December  31,  2017.  The  Tax  Cuts  and  Jobs  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 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;
● 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.

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.

Our  executive  officers,  directors  and  stockholders  who  own  more  than  5%  of  our  outstanding  common  stock,  together  with  their
affiliates and related persons, beneficially own shares of common stock representing a significant percentage of our capital stock. As a result, 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.

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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.

Certain anti-takeover provisions in our charter 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.

Provisions  in  our  amended  and  restated  certificate  of  incorporation  and  restated  bylaws  could  have  the  effect  of  making  it  more
difficult for a third party to acquire, or of discouraging a third party from attempting to acquire, or control us. These factors could limit the price
that  certain  investors  might  be  willing  to  pay  in  the  future  for  shares  of  our  common  stock.  Our  amended  and  restated  certificate  of
incorporation allows us to issue preferred stock without the approval of our stockholders. The issuance of preferred stock could decrease the
amount of earnings and assets available for distribution to the holders of our common stock or could adversely affect the rights and powers,
including  voting  rights,  of  such  holders.  In  certain  circumstances,  such  issuance  could  have  the  effect  of  decreasing  the  market  price  of  our
common stock. 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 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.

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
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.

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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 Securities and Exchange Commission (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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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 corporations 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, 2019, we had federal net operating loss carryforwards of approximately
$709.9 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 TCJA, 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. These new rules apply
regardless of the occurrence of an ownership change.

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 to accommodate our clinical operations groups and commercial team. 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 21, 2020 was 230.

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.

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Securities Authorized for Issuance Under Equity Compensation Plans

The following table provides information as of December 31, 2019, 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

 2,605,730
 —
 2,605,730

$

$

 6.74
 —
 6.74

 779,346
 —
 779,346

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

report.

COMMON STOCK PERFORMANCE GRAPH

The  following  graph  compares  the  cumulative  total  stockholder  return  on  our  common  stock  for  the  period  from  December  31,
2014 through December 31, 2019, 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, 2014, 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, 2014 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, 2019, 2018, 2017, 2016 and 2015, and Balance Sheet
Data as of December 31, 2019, 2018, 2017, 2016 and 2015, as set forth below are derived from our audited consolidated financial statements.
Audited  financial  statements  prior  to  2017  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)

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

2019

Years ended December 31, 
2017

2018

2016

2015

$

 152

$

 152

$

 152

$

 152

$

 152

 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

 5,523
 9,504
 15,027

 7,288
 7,873
 15,161

 10,298
 6,033
 16,331

 4,767
 5,122
 9,889

 —
 4,261
 43,446
 47,707

 11,436
 4,189
 15,625

 169,207

 174,552

 118,864

 79,121

 63,332

   (169,055)

 (174,400)

 (118,712)

 (78,969)

 (63,180)

 5,287
 (1,471)
 3,816

 877
 (1,795)
 (918)

 845
 (1,081)
 (236)

 886
 (1,602)
 (716)

 973
 (1,204)
 (231)

Net loss

$  (172,871)

$  (173,482)

$  (118,476)

$  (78,253)

$  (62,949)

Basic and diluted net loss per common share

$

 (1.96)

$

 (2.30)

$

 (1.91)

$

 (1.60)

$

 (1.38)

Balance Sheet Information:

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

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

$

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

$

December 31, 
2017
 84,825
 97,381
 (354,863)
 66,993

$

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

2015
$  102,417
 113,473
 (158,134)
 101,573

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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

We  are  a  biopharmaceutical  company  dedicated  to  developing  and  delivering  medicines  for  patients  with  B-cell  mediated  diseases,
including Chronic Lymphocytic Leukemia (CLL), non-Hodgkin Lymphoma (NHL) and Multiple Sclerosis (MS). We have developed a robust
B-cell  directed  research  and  development  (R&D)  platform  for  identification  of  key  B-cell  pathways  of  interest  and  rapid  clinical  testing.
Currently,  we  have  five  B-cell  targeted  drug  candidates  in  clinical  development,  with  the  lead  two  therapies,  ublituximab  (TG-1101)  and
umbralisib (TGR-1202), in pivotal trials for CLL, NHL and MS. Ublituximab is a novel anti-CD20 monoclonal antibody (mAb) that has been
glycoengineered for enhanced potency over first generation antibodies. Umbralisib is an oral, once daily, dual inhibitor of PI3K-delta and CK1-
epsilon, which may lead to a differentiated safety profile. When used together in combination therapy, ublituximab and umbralisib are referred
to as "U2". Additionally, in early clinical development we have an anti-PD-L1 monoclonal antibody referred to as cosibelimab (TG-1501), an
oral Bruton’s Tyrosine Kinase (“BTK”) inhibitor referred to as TG-1701, and an anti-CD47/CD19 bispecific antibody referred to as TG-1801.

We  also  actively  evaluate  complementary  products,  technologies  and  companies  for  in-licensing,  partnership,  acquisition  and/or
investment opportunities. To date, we have not received approval for the sale of any of our drug candidates in any market and, therefore, have
not generated any product sales from our drug candidates.

Our  license  revenues  currently  consist  of  license  fees  arising  from  our  agreement  with  Ildong.  In  accordance  with  Financial
Accounting Standards Board (“FASB”) ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”), which the Company adopted on
January  1,  2018,  we  recognize  upfront  license  fee  revenues  ratably  over  the  estimated  period  in  which  we  will  have  certain  performance
obligations, with unamortized amounts recorded as deferred revenue. We have not earned any revenues from the commercial sale of any of our
drug candidates.

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, 2019, 2018 and 2017 were approximately $148.4
million, $153.8 million and $96.9 million, respectively, excluding non-cash compensation expenses related to research and development.

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

the periods presented.

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

Total

$

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

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

2017
 62,441
 31,964
 2,481
 96,886

$

$

Our  general  and  administrative  expenses  consist  primarily  of  salaries  and  related  expenses  for  executive,  finance  and  other
administrative personnel, recruitment expenses, professional fees and other corporate expenses, including investor relations, legal activities and
facilities-related expenses.

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Our  results  of  operations  include  non-cash  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 non-cash 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.

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.  Even  if  these  trials  show  that  our  drug  candidates  are  effective  in  treating  certain
indications, there is no guarantee that we will be able to record commercial sales of any of our drug candidates in the near future, or at all. 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  further  establish  a  commercial  infrastructure  required  to  manufacture,  market  and  sell  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, 2019, 2018 and 2017

(in thousands)

License revenue

Costs and expenses:
Research and development:
Non-cash 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

75

Years Ended December 31, 
2018

2017

2019

$

 152

$

 152

$

 152

 100
 5,811
 148,269
 154,180

 5,523
 9,504
 15,027

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

 7,288
 7,873
 15,161

 —
 5,647
 96,886
 102,533

 10,298
 6,033
 16,331

 169,207

 174,552

 118,864

 (169,055)

 (174,400)

 (118,712)

 3,816

 (918)

 (236)

$  (172,871)

$  (173,482)

$  (118,476)

    
    
    
 
    
    
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
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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. We expect our
other research and development costs to continue to decrease modestly during 2020.

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.

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.  We  expect  our  other  general  and  administrative  expenses  to  increase  during  2020  as
commercial costs will increase in preparation for potential launch.

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. We expect our interest expense to decrease modestly during 2020.

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. We expect our other income to remain at a comparable level during 2020.

Years Ended December 31, 2018 and 2017

License Revenue.  License  revenue  was  approximately  $152,000  for  each  of  the  years  ended  December  31,  2018  and  2017.  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 the Company 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  $4.0  million  for  the  year  ended  December  31,  2018,  as  compared  to  zero
during the comparable period in 2017. 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, respectively.

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Noncash Compensation Expense (Research and Development). Noncash compensation expense (research and development) related to

equity incentive grants remained consistent between the two periods totaling $5.6 million for the years ended December 31, 2018 and 2017.

Other Research and Development Expenses. Other research and development expenses increased by $52.9 million from $96.9 million
for the year ended December 31, 2017 to $149.8 million for the year ended December 31, 2018. The increase in R&D expense is primarily
attributable  to  ongoing  late-stage  clinical  development  programs  and  related  manufacturing  costs  for  ublituximab  and  umbralisib  during
the year ended December 31, 2018.

Noncash Compensation Expense (General and Administrative). Noncash compensation expense (general and administrative) related to
equity incentive grants decreased by $3.0 million from $10.3 million for the year ended December 31, 2017 to $7.3 million during the year
ended December 31, 2018. The decrease in noncash compensation expense was primarily related to a decrease in the measurement date fair
value of certain consultant restricted stock during the year ended December 31, 2018 and greater compensation expense during the year ended
December 31, 2017 related to restricted stock granted to executive personnel.

Other General and Administrative Expenses. Other general and administrative expenses increased by $1.9 million from $6.0 million
for  the  year  ended  December  31,  2017  to  $7.9  million  for  the  year  ended  December  31,  2018.  The  increase  was  due  primarily  to  increased
personnel and other general and administrative costs.

Other Expense (Income), Net. Other income increased by $0.7 million from $0.2 million for the year ended December 31, 2017 to $0.9

million for the year ended December 31, 2018. The increase is mainly due to an increase in interest income during 2018.

LIQUIDITY AND CAPITAL RESOURCES

Our primary sources of cash have been from the sale of equity securities, and the issuance of debt. We have not yet commercialized
any of our drug candidates and cannot be sure if we will ever be able to do so. Even if we commercialize one or more of our drug candidates,
we may not become profitable. Our ability to achieve profitability depends on a number of 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, 2019, we had $140.4 million in cash and cash equivalents, and investment securities. We anticipate that our cash
and cash equivalents, and investment securities as of December 31, 2019 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, 2019 was $132.8 million as compared to $128.9 million for the year
ended December 31, 2018. 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,  2019,  net  cash  used  in  investing  activities  was  $0.7  million  as  compared  to  cash  provided  by
investing  activities  of  $1.2  million  for  the  year  ended  December  31,  2018.  The  decrease  in  net  cash  provided  by  investing  activities  was
primarily due to greater proceeds from the sale of short-term securities during the year ended December 31, 2018.

For the year ended December 31, 2019, net cash provided by financing activities of $204.2 million related to the net proceeds from
debt  financings  and  net  proceeds  from  the  issuance  of  common  stock  as  part  of  our  ATM  program,  a  public  offering  in  March  2019,  and  a
registered direct offering in December 2019.

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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.

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 an "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, 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.

On  September  5,  2019,  we  filed  an  automatic  "shelf  registration"  statement  on  Form  S-3  (the  "2019  WKSI")  as  a  "well-known
seasoned issuer" as defined in Rule 405 under the Securities Act of 1933, as amended. Under this shelf process, we may sell any combination of
the securities described in the related prospectus in one or more offerings.

Equity Financings

In March 2017, we completed an underwritten public offering of 5,128,206 shares of our common stock (plus a 30-day underwriter
overallotment option to purchase up to an additional 769,230 shares of common stock, which was exercised) at a price of $9.75 per share. Net
proceeds  from  this  offering,  including  the  overallotment  option,  were  approximately  $54  million,  net  of  underwriting  discounts  and  offering
expenses of approximately $3.6 million.

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. 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. Net proceeds from this offering were approximately $50.0 million.

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, is available through December 15, 2020 subject to the approval of Hercules’ investment committee.

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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%, and (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.

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.

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OBLIGATIONS AND COMMITMENTS

As  of  December  31,  2019,  we  have  known  contractual  obligations,  commitments  and  contingencies  of  $97.6  million  related  to  our

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  

$

$

 20,440
 30,000
 47,168  
 97,608

$

$

 2,331
 —

 47,168  
 49,499

$

$

 3,785
 30,000

$

 —  

$

 3,709
 —
 —  

 33,785

$

 3,709

$

 10,615
 —
 —
 10,615

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. We have incurred expenses related to this agreement of approximately $47.2
million as of December 31, 2019, which include both service fees, raw material costs and administrative fees. No payments have been made to
the contract manufacturer as of December 31, 2019. Accordingly, as of December 31, 2019, $47.2 million is included in current liabilities in the
Company’s consolidated balance sheet, of which $19.6 million is due in the first quarter of 2020. As of December 31, 2018, $18.4 million is
included in long-term liabilities in the Company’s consolidated balance sheet. We will incur an administrative fee of six percent (6%) per year
starting  from  the  date  of  invoice  issuance.  For  the  year  ended  December  31,  2019,  we  have  accrued  $1.2  million  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,  2019,  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 $11.8 million and $9.4 million, respectively, as of December 31, 2019. Our leases
have remaining lease terms of 4 months to 12 years. One lease has a renewal option to extend the lease for an additional term of 2 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, 2019, the allocation rate is 61%
and will be evaluated again in August 2020 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, $1.4 million and $1.4 million for the years ended December 31, 2019, 2018 and

2017, respectively.

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Future minimum lease commitments as of December 31, 2019 total, in the aggregate, approximately $19.9 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 period as of December 31, 2019.

CRITICAL ACCOUNTING POLICIES

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.

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:

Revenue Recognition. Effective January 1, 2018, the Company began recognizing revenue under Accounting Standards Codification
(“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

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.

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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.

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.

Accruals  for  Clinical  Research  Organization  and  Clinical  Site  Costs.  We  make  estimates  of  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.
Significant  judgments  and  estimates  must  be  made  and  used  in  determining  the  accrued  balance  and  expense  in  any  accounting  period.  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 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.  The  objective  of  our  policy  is  to  match  the  recording  of  expenses  in  our  financial  statements  to  the  actual  services  received  and
efforts expended. As such, expense accruals related to clinical site costs are recognized based on our estimate of the degree of completion of the
event or events specified in the specific clinical study or trial contract.

Accounting For Income Taxes. In preparing our consolidated financial statements, we are required to estimate our income taxes in each
of the jurisdictions in which we operate. This process involves management estimation of our actual current tax exposure and assessment of
temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets
and liabilities. We must then assess the likelihood that our deferred tax assets will be recovered from future taxable income and, to the extent we
believe that recovery is not likely, we must establish a valuation allowance. To the extent we establish a valuation allowance or increase this
allowance  in  a  period,  we  must  include  an  expense  within  the  tax  provision  in  the  consolidated  statements  of  operations.  Significant
management  judgment  is  required  in  determining  our  provision  for  income  taxes,  our  deferred  tax  assets  and  liabilities  and  any  valuation
allowance  recorded  against  our  net  deferred  tax  assets.  We  have  fully  offset  our  deferred  tax  assets  with  a  valuation  allowance.  Our  lack  of
earnings history and the uncertainty surrounding our ability to generate taxable income prior to the reversal or expiration of such deferred tax
assets were the primary factors considered by management in maintaining the valuation allowance.

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.

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.

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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 right of use 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,  2019,  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, 2019, 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,  2019,  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, 2019, 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, 2019. 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, 2019, 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,  2019  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, 2019.

Changes in Internal Control Over Financial Reporting. There were no changes in our internal control over financial reporting during
the  quarter  ended  December  31,  2019  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. (the Company’s) internal control over financial reporting as of December 31, 2019, 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, 2019, 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  Stated)
(PCAOB),  the  consolidated  balance  sheets  and  the  related  consolidated  statements  of  operations,  stockholders’  equity  and  cash  flows  of  the
Company as of December 31, 2019 and 2018 and for each of the three years in the period ended December 31, 2019 and our report dated March
2, 2020, 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 2, 2020

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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 2020 Annual Meeting of

Stockholders.

ITEM 11. EXECUTIVE COMPENSATION.

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

Stockholders.

ITEM  12.  SECURITY  OWNERSHIP  OF  CERTAIN  BENEFICIAL  OWNERS  AND  MANAGEMENT  AND  RELATED
STOCKHOLDER MATTERS.

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

Stockholders.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE.

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

Stockholders.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES.

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

Stockholders.

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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, 2019 and 2018

Consolidated Statements of Operations for the years ended December 31, 2019, 2018 and 2017

Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2019, 2018 and 2017

Consolidated Statements of Cash Flows for the years ended December 31, 2019, 2018 and 2017

Notes to Consolidated Financial Statements

2.      Consolidated Financial Statement Schedules

Page
F-1

F-3

F-4

F-5

F-6

F-7

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 3.2 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

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.

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).*

Licensing 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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10.17

10.18

10.19

10.20

10.21

10.22

10.23

10.24

10.25

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,
2019, 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, 2019 and 2018

Consolidated Statements of Operations for the years ended December 31, 2019, 2018 and 2017

Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2019, 2018 and 2017

Consolidated Statements of Cash Flows for the years ended December 31, 2019, 2018 and 2017

Notes to Consolidated Financial Statements

90

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Table of Contents

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. (the “Company”) as of December 31, 2019
and  2018, and the related consolidated statements of operations, stockholders’ equity and cash flows for each of the three years in the period
ended  December  31,  2019,  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, 2019 and 
2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, 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, 2019, 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 2,
2020, 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.

Change in Accounting Principle

As discussed in Notes 1 and 8 to the consolidated financial statements, the Company has changed its method of accounting for leases

as of January 1, 2019 due to the adoption of Accounting Standard Codification Topic 842, Leases.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements
that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to
the  consolidated  financial  statements  and  (ii)  involved  especially  challenging,  subjective,  or  complex  judgments.    The  communication  of  a
critical  audit  matter  does  not  alter  in  any  way  our  opinion  on  the  consolidated  financial  statements,  taken  as  a  whole,  and  we  are  not,  by
communicating  the  critical  audit  matter  below,  providing  a  separate  opinion  on  the  critical  audit  matter  or  on  the  accounts  or  disclosures  to
which it relates.

Liquidity and Capital Resources

As  discussed  in  Note  1  to  the  consolidated  financial  statements,  the  Company  has  incurred  losses  since  inception,  and  expects  to
continue to incur losses for the foreseeable future.  At December 31, 2019, the Company believes its cash and cash equivalents and short-term
investment  securities  will  be  sufficient  to  fund  the  Company’s  planned  operations  for  at  least  a  year  beyond  the  date  of  the  issuance  of  the
consolidated financial statements.

F-1

Table of Contents

We identified Liquidity and Capital Resources as a critical audit matter due to the subjective judgments required of management to
conclude the Company would have sufficient liquidity to sustain itself for at least a year beyond the date of the issuance of the consolidated
financial  statements.  This  in  turn  led  to  a  high  degree  of  auditor  subjectivity  and  judgment  to  evaluate  the  audit  evidence  supporting  the
liquidity conclusions. Additionally, the relevance of management’s liquidity conclusions to the users of the consolidated financial statements
also impacted our assessment of these circumstances as a critical audit matter.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with our overall opinion on the

consolidated financial statements.  The procedures we performed to address this critical audit matter included:

● Testing the reasonableness of the total liquid assets at December 31, 2019.
● Evaluating the amount and timing of forecasted clinical trial expenses and related payments, including negotiated vendor payment

terms (see Note 6 to the consolidated financial statements).

● Evaluating  the  fluctuations  in  forecasted  clinical  trial  expenses  and  payments  thereof  as  compared  to  historic  amounts  and  the

underlying management assumptions.

● Evaluating the reasonableness of the amounts and timing of payments of forecasted general and administrative expenses and other

income, net.

● Reconsidering  certain  prior  management  forecasted  amounts  to  evaluate  whether  those  forecasted  amounts  approximated  the

ultimate actual results. This was performed in consideration of management’s ability to put forth reasonable estimates.
● Evaluating the adequacy of the Company’s disclosure of these circumstances in the consolidated financial statements.

/s/ CohnReznick LLP

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

New York, New York

March 2, 2020

F-2

TG Therapeutics, Inc. and Subsidiaries
Consolidated Balance Sheets as of December 31
(in thousands, except share and per share amounts)

Table of Contents

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 asset
Goodwill

Total assets

Liabilities and stockholders’ equity
Current liabilities:

Accounts payable and accrued expenses
Other current liabilities
Lease liability – current portion
Accrued compensation

Total current liabilities

Deferred rent
Deferred revenue, net of current portion
Long-term debt
Lease liability – non current
Long-term liabilities

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, 2019 and 2018)
Common stock, $0.001 par value per share (150,000,000 shares authorized, 109,425,243 and
83,911,855 shares issued, 109,383,934 and 83,870,546 shares outstanding at December 31, 2019 and
2018, respectively)
Additional paid-in capital
Treasury stock, at cost, 41,309 shares at December 31, 2019 and 2018
Accumulated deficit

Total stockholders’ equity
Total liabilities and stockholders’ equity

2019

2018

$

$

$

$

$

$

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

41,958
26,943
9,691
439
79,031
1,241
2,294
251
—
799
83,616

36,377
219
—
2,258
38,854
1,462
914
—
—
18,350
59,580

—  

—

109
739,956
(234)
(701,216)
38,615
163,014

$

84
552,531
(234)
(528,345)
24,036
83,616

$

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

F-3

    
    
 
    
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
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:

Non-cash 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

Net loss

Basic and diluted net loss per common share

2019

2018

2017

$

152

$

152

$

152

100
5,811
148,269
154,180

5,523
9,504
15,027

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

7,288
7,873
15,161

—
5,647
96,886
102,533

10,298
6,033
16,331

169,207

174,552

118,864

(169,055)

(174,400)

(118,712)

5,287
(1,471)
3,816

877
(1,795)
(918)

845
(1,081)
(236)

(172,871) $

(173,482) $

(118,476)

(1.96) $

(2.30) $

(1.91)

$

$

Weighted average shares used in computing basic and diluted net loss per common share

  88,368,844

  75,466,813

  62,069,570

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

F-4

    
    
    
 
    
    
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Consolidated Statements of Stockholders’ Equity for the Years Ended December 31, 2019, 2018 and 2017
(in thousands, except share amounts)

Balance at January 1, 2017
Issuance of common stock in connection with exercise of
warrants
Issuance of restricted stock
Forfeiture of restricted stock
Issuance of common stock in public offering (net of
offering costs of $3.6 million)
Issuance of common stock in At-the-Market offering (net
of offering costs of $1.1 million)
Compensation in respect of restricted stock granted to
employees, directors and consultants
Net loss
Balance at December 31, 2017
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

* Amount less than one thousand dollars.

Additional
Paid-in
     Amount           Capital

Common Stock

Shares
56,820,422   $

Treasury Stock
     Shares      Amount     

Accumulated
Deficit

Total

57  

  $

272,432  

41,309   $

(234)  $

(236,387)  $

35,868

887,585  
1,836,511  
(53,875) 

5,897,436  

7,793,671  

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

*  
2  

6  

8  

73  
2  
*  

9  

*  

84
1

*

10

14

*

2,142  
(2) 
*  

53,634  

77,865  

15,945  

422,017  
(2) 
*  

113,630  

12,886  
4,000  

552,531  
(1) 

993
*

77,465

97,533

11,335
100

41,309  

(234) 

(118,476) 
(354,863) 

41,309

(234)

(173,482) 
(528,345)

109,425,243

$

109

$

739,956

41,309

$

(234)

$

(172,871)
(701,216)

$

2,142
—
—

53,640

77,873

15,945
(118,476)
66,993
—
—

113,639

12,886
4,000
(173,482)
24,036
—
993
—

77,475

97,547

11,335
100
(172,871)
38,615

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

F-5

    
    
 
 
 
    
    
    
 
 
    
    
    
 
 
 
    
    
    
 
 
    
    
    
 
 
    
    
    
 
 
 
 
    
    
    
 
 
 
 
    
    
    
 
 
 
 
    
    
    
 
 
    
    
    
 
 
    
    
    
 
 
 
 
    
    
    
 
 
    
    
    
 
 
 
 
    
    
    
 
 
 
 
  
 
  
 
  
 
Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Consolidated Statements of Cash Flows for the Years Ended December 31
(in thousands)

CASH FLOWS FROM OPERATING ACTIVITIES

Consolidated net loss
Adjustments to reconcile consolidated net loss to net cash used in operating activities:
Non-cash 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
Non-cash change in lease liability and right-of-use asset
Change in fair value of notes payable and accrued interest
Changes in assets and liabilities:

Decrease (increase)  in other current assets
(Increase) decrease in accrued interest receivable
Decrease in other assets
(Decrease) increase in accounts payable and accrued expenses
Decrease in lease liabilities
Increase in interest payable
Increase in other liabilities
Increase in deferred rent
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 debt financings
Proceeds from the exercise of warrants
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 

NONCASH TRANSACTIONS
Deferred financing costs
Warrants issued with debt financing
Shares issued in connection with in-licensing
Reclassification of deferred financing costs to additional paid-in capital

2019

2018

2017

$

(172,871)

$

(173,482)

$

(118,476)

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)

12,886
4,000
88
(119)
—
135
—
(61)

(1,638)
14
—  

10,957
—
—
18,350
97
(152)
(128,925)

32,500
(31,230)
(90)
1,180

175,021
29,987

—  

(795)
204,213

113,639
—
—  
—  

113,639

70,689

43,199

113,888

112,637
1,251
113,888

$

$

$

(14,106)

57,305

43,199

41,958
1,241
43,199

$

$

$

15,945
—
82
61
—
125
—
59

(2,665)
(25)
162
11,020
—
—
—
104
(152)
(93,760)

19,800
(28,006)
(2)
(8,208)

131,516
—
2,143
—
133,659

31,691

25,614

57,305

56,718
587
57,305

$
988
$
993
100
$
— $

— $
— $
$
— $

4,000

—
—
—
(3)

$

$

$

$
$
$
$

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

F-6

    
    
    
 
    
    
  
 
    
    
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
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

We  are  a  biopharmaceutical  company  dedicated  to  developing  and  delivering  medicines  for  patients  with  B-cell  mediated  diseases,
including Chronic Lymphocytic Leukemia (CLL), non-Hodgkin Lymphoma (NHL) and Multiple Sclerosis (MS). We have developed a robust
B-cell  directed  research  and  development  (R&D)  platform  for  identification  of  key  B-cell  pathways  of  interest  and  rapid  clinical  testing.
Currently,  we  have  five  B-cell  targeted  drug  candidates  in  clinical  development,  with  the  lead  two  therapies,  ublituximab  (TG-1101)  and
umbralisib (TGR-1202), in pivotal trials for CLL, NHL and MS. Ublituximab is a novel anti-CD20 monoclonal antibody (mAb) that has been
glycoengineered for enhanced potency over first generation antibodies. Umbralisib is an oral, once daily, dual inhibitor of PI3K-delta and CK1-
epsilon, which may lead to a differentiated safety profile. When used together in combination therapy, ublituximab and umbralisib are referred
to as "U2". Additionally, in early clinical development we have an anti-PD-L1 monoclonal antibody referred to as cosibelimab (TG-1501), an
oral Bruton’s Tyrosine Kinase (“BTK”) inhibitor referred to as TG-1701, and an anti-CD47/CD19 bispecific antibody referred to as TG-1801.

We  also  actively  evaluate  complementary  products,  technologies  and  companies  for  in-licensing,  partnership,  acquisition  and/or
investment opportunities. To date, we have not received approval for the sale of any of our drug candidates in any market and, therefore, have
not generated any product sales from our drug candidates.

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, 2019, we have an accumulated deficit of $701.2 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).  We  have  not  yet
commercialized any of our drug candidates and cannot be sure if we will ever be able to do so. Even if we commercialize one or more of our
drug candidates, we may not become profitable. Our ability to achieve profitability depends on many 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, 2019, we had $140.4 million in cash and cash equivalents, and investment securities. We anticipate that our cash
and cash equivalents, and investment securities as of December 31, 2019 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.

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

F-7

 
Table of Contents

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 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 right of use 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 condensed 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  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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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, 2019 and 2018, 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, 2019 and 2018 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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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 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.
Significant  judgments  and  estimates  must  be  made  and  used  in  determining  the  accrued  balance  and  expense  in  any  accounting  period.  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 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.  The  objective  of  our  policy  is  to  match  the  recording  of  expenses  in  our  financial  statements  to  the  actual  services  received  and
efforts expended. As such, expense accruals related to clinical site costs are recognized based on our estimate of the degree of completion 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
CRO’s, 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,  2019  and
December  31,  2018,  we  recorded  approximately  $8.1  million  and  $9.7  million,  respectively,  in  prepaid  research  and  development  related  to
such advance agreements.

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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.

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 8,361,739, 6,528,932 and 4,835,706 at December 31, 2019, 2018 and 2017, respectively. During the years ended December 31,
2019, 2018 and 2017, 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
 Shares issuable upon note conversion
 Warrants
 Total

2019
5,591,786  
2,605,730  
17,165  
147,058  
8,361,739  

December 31, 
2018
4,595,689  
1,916,900  
16,343  
—  
6,528,932  

2017
4,820,143
—
15,563
—
4,835,706

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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, 2019.

NOTE 2 – CASH AND CASH EQUIVALENTS

The following tables summarize our cash and cash equivalents at December 31, 2019 and 2018:

(in thousands)

Checking and bank deposits
Money market funds
    Total

NOTE 3 – INVESTMENT SECURITIES

December 31, 
2019

December 31, 
2018

     $

110,135      $

2,502
112,637

$

$

39,268
2,690
41,958

Our investments as of December 31, 2019 and 2018 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, 2019 and 2018:

(in thousands)
Short-term investments:
Obligations of domestic governmental agencies (maturing between January 2020
and September 2020) (held-to-maturity)
Total short-term investment securities

Short-term investments:
Obligations of domestic governmental agencies (maturing between January 2019
and November 2019) (held-to-maturity)
Total short-term investment securities

F-12

Amortized
cost, as
adjusted

December 31, 2019

Gross
unrealized

Gross
unrealized

     holding gains      holding losses     

Estimated
fair value

$
$

27,798
27,798

$
$

28
28

$
$

— $
— $

27,826
27,826

December 31, 2018

     Amortized     
cost, as
adjusted

Gross
unrealized
holding gains

Gross
unrealized
holding losses

Estimated
fair value

$
$

26,943
26,943

$
$

2
2

$
$

10
10

$
$

26,935
26,935

 
    
  
  
    
    
    
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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

NOTE 4 – FAIR VALUE MEASUREMENTS

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,  2019  and  2018,  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.

The cumulative liability including accrued and unpaid interest of the 5% Notes was approximately $19.3 million at December 31, 2019

and $18.4 million at December 31, 2018. No payments have been made on the 5% Notes through December 31, 2019.

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, 2019 and 2018. 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, 2019 and 2018:

(in thousands)

5% Notes
Total

5% Notes
Total

$
$

$
$

Financial liabilities at fair value as of December 31, 2019
Total

Level 2

Level 3

Level 1

— $
— $

— $
— $

190
190

$
$

190
190

Financial liabilities at fair value as of December 31, 2018
Total

Level 3

Level 2

Level 1

— $
— $

— $
— $

67
67

$
$

67
67

The Level 3 amounts above represent the fair value of the 5% Notes and related accrued interest.

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

The following table summarizes the changes in Level 3 instruments for the years ended December 31, 2018 and 2019:

(in thousands)
Balance at January 1, 2018

Interest accrued on face value of 5% Notes
Conversion of 5% Notes
Change in fair value of Level 3 liabilities

Balance at December 31, 2018

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

     $

$

128
878
—
(939)
67
924
—
(801)
190

The  change  in  the  fair  value  of  the  Level  3  liabilities  is  reported  in  other  (income)  expense  in  the  accompanying  consolidated

statements of operations.

NOTE 5 – STOCKHOLDERS’ EQUITY

Preferred Stock

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.

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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 with MLV & Co, LLC (“MLV”) (the "2015 ATM") such that we may 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 pay 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.

In March 2017, we completed an underwritten public offering of 5,128,206 shares of our common stock (plus a 30-day underwriter
overallotment option to purchase up to an additional 769,230 shares of common stock, which was exercised) at a price of $9.75 per share. Net
proceeds  from  this  offering,  including  the  overallotment  option,  were  approximately  $54  million,  net  of  underwriting  discounts  and  offering
expenses of approximately $3.6 million.

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 an "Agent" and collectively, the "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.

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.  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")  as  a  "well-known
seasoned issuer" as defined in Rule 405 under the Securities Act of 1933, as amended. The 2019 WKSI was declared effective in September
2019. Under this shelf process, we may sell any combination of the securities described in the related prospectus in one or more offerings.

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. Net proceeds from this offering were approximately $50.0 million.

The 2017 S-3 and the 2019 WKSI are currently our only active shelf registration statements. After deducting shares already sold, there
is  approximately  $9.5  million  of  common  stock  that  remains  available  for  sale  under  the  2017  S-3,  and  unlimited  capacity  under  the  2019
WKSI,  at  December  31,  2019.  We  may  offer  the  securities  under  the  2017  S-3  and  2019  WKSI  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 provides us with the flexibility to raise additional capital to finance our operations as needed.

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Treasury Stock

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

As of December 31, 2019 and 2018, 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  2018.  Pursuant  to  this  amendment,  6,000,000  shares  were  added  to  the  2012  Incentive  Plan.  As  of  December  31,  2019  and  2018,
2,605,730 and 1,916,900 options, respectively, were outstanding and up to an additional 779,346 shares may be issued under the 2012 Incentive
Plan.

Effective as of January 1, 2017, we entered into an amendment (the “Amendment”) to the employment agreement entered into as of
December 15, 2011 (together with the Amendment, the “Employment Agreement”) with Michael S. Weiss, our Executive Chairman and Chief
Executive Officer and President. Under the Amendment, Mr. Weiss will remain as Chief Executive Officer and President, removing the interim
status.  Simultaneously,  we  entered  into  a  Strategic  Advisory  Agreement  (the  “Advisory  Agreement”)  with  Caribe  BioAdvisors,  LLC  (the
“Advisor”)  owned  by  Mr. Weiss  to  provide  the  services  of  Mr. Weiss  as  Chairman  of  the  Board  and  as  Executive  Chairman.  As  part  of  the
Amendment,  Mr.  Weiss  also  agreed  to  forfeit  3,381,866  restricted  shares  previously  granted  under  the  Employment  Agreement  that  were
predominantly subject to time-based vesting over the next three years. Simultaneously, (i) Mr. Weiss was issued 418,371 restricted shares under
the  Employment  Agreement  that  vest  in  2018  and  2019  and  (ii)  the  Advisor  was  issued  2,960,000  restricted  shares  under  the  Advisory
Agreement that vested on market capitalization thresholds ranging from $375 million to $750 million. In accordance with GAAP, there was no
incremental stock compensation expense recognition as a result of the modification.

Stock Options

The  estimated  fair  value  of  the  options  granted  in  the  year  ended  December  31,  2019  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, 2019 and
2018:

Number of 
shares

Weighted-
 average 
exercise price

     Weighted-

average
Contractual 
Term
(in years)

Aggregate 
intrinsic value

Outstanding at December 31, 2017
Granted
Exercised
Forfeited
Expired
Outstanding at December 31, 2018
Granted
Exercised
Forfeited
Expired
Outstanding at December 31, 2019

—
  1,916,900

$
—  
—  
—
1,916,900
815,000
—
(126,170)
—
2,605,730

$

$

—
6.50  
—  
—  
—  

6.50
7.18
—
6.10
—
6.73

— $

—

9.75

$

—

8.92

$ 11,706,110

Vested and expected to vest at December 31, 2019

  2,605,730

$

6.73  

8.92

$ 11,706,110

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Total expense associated with the stock options was approximately $3.5 million, zero and zero during the years ended December 31,
2019, 2018 and 2017, respectively. As of December 31, 2019, there was approximately $2.6 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  1.5  years.  As  of
December 31, 2019, 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 compensation expense of $0.3 million  during the year ended December 31, 2019 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

Restricted Stock

Year ended

December 31, 
2019

December 31, 
2018

172.99-291.61  
5.0-6.25  
1.82-2.49 %

--

192.76-296.71
5.0-6.25
2.49-2.56 %

--

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, 2019, 2018 and 2017:

Outstanding at January 1, 2017
Granted
Vested
Forfeited
Outstanding at December 31, 2017
Granted
Vested
Forfeited
Outstanding at December 31, 2018
Granted
Vested
Forfeited
Outstanding at December 31, 2019

Number of Shares

     Weighted Average 
Grant Date Fair 
Value

8,642,055   $
1,836,511  
(4,103,048) 
(53,875) 
6,321,643  
1,562,211  
(1,596,966) 
(191,196) 
6,095,692
1,851,520
(738,960)
(116,463)
7,091,789

$

7.20
6.40
5.24
8.47
7.17
13.07
9.38
8.13
8.07
12.95
9.08
7.96
7.78

Total compensation expense associated with restricted stock grants was $7.8 million, $12.9 million and $15.9 million during the years
ended December 31, 2019, 2018 and 2017, respectively. As of December 31, 2019, there was approximately $15.3 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, 2019, 1,103,011 shares of restricted stock outstanding which are milestone-based and
vest  upon  certain  corporate  milestones;  and  2,021,250  shares  of  restricted  stock  outstanding  issued  to  non-employees.  Milestone-based  non-
cash compensation expense will be measured and recorded if and when a milestone becomes probable.

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Warrants

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

The following table summarizes warrant activity for the years ended December 31, 2019, 2018 and 2017:

Outstanding at January 1, 2017
Issued
Exercised
Expired
Outstanding at December 31, 2017
Issued
Exercised
Expired
Outstanding at December 31, 2018
Issued
Exercised
Expired
Outstanding at December 31, 2019

Warrants
913,379

$
—  

(887,585)
(25,794)

—  
—  
—  
—  
—
147,058

—  
—  
$

147,058

Weighted-
 average exercise 
price

2.41

Aggregate 
intrinsic value
$ 1,961,403

—  

2.41

—  
—
—  
—  
—  
—
4.08

—  
—  

—

—

4.08

$ 1,032,347

There was no expense related to warrants during the years ended December 31, 2019, 2018 and 2017.

NOTE 6 – OTHER LIABILITIES

The following is a summary of notes payable included in other current liabilities on the Company's consolidated balance sheet:

(in thousands)

Convertible 5% Notes Payable
  Totals

Convertible 5% Notes Payable

December 31, 2019
Non-
current 
portion, 
net

Current 
portion, 
net

Total

December 31, 2018
Non-
current 
portion, 
net

Current 
portion, 
net

$
$

190
190

$
$

— $
— $

190
190

$
$

67
67

$
$

— $
— $

Total

67
67

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 $19.3 million at December 31, 2019

and $18.4 million at December 31, 2018. No payments have been made on the 5% Notes through December 31, 2019.

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).

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Current Liabilities

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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
$47.2 million as of December 31, 2019, which include service fees, raw material costs and administrative fees. No payments have been made to
the contract manufacturer as of December 31, 2019. Accordingly, as of December 31, 2019, $47.2 million is included in current liabilities in the
Company’s consolidated balance sheet, of which $19.6 million is due in the first quarter of 2020. As of December 31, 2018, $18.4 million is
included  in  long-term  liabilities  in  the  Company’s  condensed  consolidated  balance  sheet.  We  will  incur  an  administrative  fee  of  six  percent
(6%) per year starting from the date of invoice issuance. For the year ended December 31, 2019, we have accrued $1.2 million 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%, and (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. As of and through
December 31, 2019, 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.

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Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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
$0.8 million for the year ended December 31, 2019. At December 31, 2019, the remaining unamortized balance of debt issuance costs was $2.0
million.

Long-term debt as of December 31, 2019, is as follows (in thousands):

Long-term debt
End of term fee

Less: unamortized debt issuance costs

Less: Current portion
Long-term debt non-current

NOTE 8 - LEASES

December 31,
2019

30,000
975
30,975
(2,005)
28,970
—
28,970

$

$

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  Right  of  Use  (“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 $11.8 million and $9.4 million,
respectively, as of December 31, 2019. Our leases have remaining lease terms of 4 months to 12 years. One lease has a renewal option to extend
the lease for an additional term of 2 years.

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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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,  2019,  the  allocation  rate  is  61%  and  will  be  evaluated  again  in  August  2020  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 year ended

December 31, 2019 and 2018:

(in thousands)
Operating lease cost
Net lease cost

December 31, 
2019

December 31, 
2018

$
$

2,651
2,651

$
$

1,440
1,440

As of December 31, 2019, the weighted-average remaining operating lease term was 8.4 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, 2019 was $1.5 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

As of December 31, 2019, the maturities of lease liabilities were as follows:

(in thousands)
2020
2021
2022
2023
2024
After 2024
Total lease payments
Less: Interest
Present value of lease liabilities(*)

December 31, 
2019

1,616
10,218
11,834

Operating
leases

1,804
1,874
1,911
1,913
1,796
10,615
19,913
(8,079)
11,834

$

$

$

$

(*)  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.

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NOTE 9 – INCOME TAXES

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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 basis 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 $186,711,000 and
$142,947,000 as of December 31, 2019 and 2018, respectively.

On December 22, 2017, H.R.1, commonly known as the Tax Cuts and Jobs Act (the “Act”) was signed into law. Among other things,
the Act reduced our corporate federal tax rate from 34% to 21% effective January 1, 2018. As a result, we were required to re-measure, through
income tax expense, our deferred tax assets and liabilities using the enacted rate at which we expect them to be recovered or settled. The re-
measurement  of  our  net  deferred  tax  asset  would  have  resulted  in  additional  income  tax  expense  of  $51,767,584  as  of  December  31,  2017;
however,  with  full  valuation  allowance  in  place,  the  expense  was  reversed  through  a  corresponding  adjustment  to  the  valuation  allowance,
resulting in no impact on income tax expense.

As  of  December  31,  2019,  we  have  U.S.  net  operating  loss  carryforwards  (“NOLs”)  of  approximately  $709,949,000,  research  and
development credit carryforwards (“R&D credits”) of approximately $22,483,000 and business interest expense carryforward of $3,189,000.
  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 net
operating loss 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, 2019 and 2018 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

F-22

2019

2018

$

158,177
22,483
4,680
710
661
186,711

122,678
15,217
4,394
—
658
142,947

(186,711)

— $

(142,947)
—

$

$

    
    
 
    
  
 
 
 
 
 
 
 
 
 
 
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TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

There  was  no  current  or  deferred  income  tax  expense  for  the  year  ended  December  31,  2019.  Income  tax  expense  differed  from
amounts computed by applying the US Federal income tax rate of 21% for the years ended December 31, 2019 and 2018, and 34% for the year
ended December 31, 2017 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, 
2018

2017

2019

$

$

(172,871)

(36,303)

$

$

(173,482)

$

(118,476)

(36,431)

(40,282)

(2,128)
(7,266)
641
1,292

(2,243)
(4,726)
639
(473)

—  

43,764

—  

43,234

$

— $

— $

(1,106)
(3,697)
1,563
8,213
51,768
(16,459)
—

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.

The  Company  would  recognize  interest  and  penalties,  if  any,  to  uncertain  tax  position  in  income  tax  expense  in  the  statement  of
operations. There was no accrual for interest and penalties related to uncertain tax positions for 2019. 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, 2019 and 2018, and, at December 31, 2019 and 2018, have deferred revenue
of approximately $0.9 million and $1.1 million, respectively, associated with this $2 million payment (approximately $152,000 of which has
been classified in current liabilities at December 31, 2019 and 2018).

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.

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Table of Contents

TGR-1202 (Umbralisib)

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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  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 New Drug Application (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 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  $4.1  million  and  $0.6  million  for  the  years  ended  December  31,  2019  and  2018,  the  majority  of  which  relates  to
manufacturing expenses of PD-L1. The relevant expenses are recorded in other research and development in the accompanying consolidated
statement of operations.

TG-1601: BET

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  Jiangsu  an
upfront fee of $1.0 million in our common stock recorded to noncash stock expense associated with in-licensing agreements in our condensed
consolidated  statement  of  operations.  In  addition,  in  July  2019,  we  paid  Jiangsu  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. Jiangsu 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.

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Table of Contents

TG-1801: anti-CD47/anti-CD19

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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

Other Parties

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 Right of Use (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 condensed 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, 2019, the allocation rate
is 61% and will be evaluated again in August 2020 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  $0.9
million, $1.6 million and $1.2 million for shared services for the years ended December 31, 2019, 2018 and 2017, 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 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.

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Table of Contents

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

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 $4.1 million and $0.6 million for the years ended December 31, 2019 and 2018 , the majority of which
relates  to  manufacturing  expenses  of  PD-L1.  The  relevant  expenses  are  recorded  in  other  research  and  development  in  the  accompanying
consolidated statement of operations.

NOTE 12 – COMMITMENTS AND CONTINGENCIES

As  of  December  31,  2019,  we  have  known  contractual  obligations;  commitments  and  contingencies  of  $97.6  million  related  to  our

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

$

$

20,440
30,000
47,168
97,608

$

$

2,331
—
47,168
49,499

$

$

3,785
30,000

$

—  
$

33,785

$

3,709
—
—  
$

3,709

10,615
—
—
10,615

See Note 6 for a detailed description of our current liabilities. Future minimum contractual commitments as of December 31, 2019

total approximately $47.2 million and are due in 2020.

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, $1.4 million and $1.4 million for the years ended December 31, 2019, 2018, and 2017, respectively.

Future  minimum  lease  commitments  as  of  December  31,  2019,  in  the  aggregate  total  approximately  $20.4  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, 2019.

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Table of Contents

NOTE 13 – QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

TG Therapeutics, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

(in thousands)

License revenue

Total costs and expenses

Net loss

March 31, 
2019

June 30, 
2019

September 30, 
2019

December 31, 
2019

3 Months Ended

$

38

$

38

$

38

$

38

34,727

35,582

60,899

37,998

$ (35,156) $ (36,213) $

(61,930) $

(39,571)

Basic and diluted net loss per common share

$

(0.43) $

(0.42) $

(0.69) $

(0.44)

(in thousands)

License revenue

Total costs and expenses

Net loss

     March 31, 

2018

June 30, 
2018

     September 30,       December 31, 

2018

2018

3 Months Ended 

$

38

$

38

$

38

$

38

41,615

44,383

34,366

54,188

$ (41,529) $ (44,142) $

(33,951) $

(53,860)

Basic and diluted net loss per common share

$

(0.59) $

(0.59) $

(0.43) $

(0.68)

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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 2, 2020

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 2, 2020, 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

Executive Chairman, Chief Executive Officer and President
(principal executive officer)

Title

Chief Financial Officer (principal financial and accounting officer)

Director

Director

Director

Director

Director

99

    
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:

(cid:0)      the title and liquidation preference per share of the preferred stock and the number of shares offered;

(cid:0)      the purchase price of the preferred stock;

(cid:0)      the dividend rate (or method of calculation);

(cid:0)      the dates on which dividends will be paid and the date from which dividends will begin to accumulate;

(cid:0)      any redemption or sinking fund provisions of the preferred stock;

(cid:0)      any listing of the preferred stock on any securities exchange or market;

(cid:0)      any conversion provisions of the preferred stock;

(cid:0)      the voting rights, if any, of the preferred stock; and

(cid:0)            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:

(cid:0)      the title of the warrants;

(cid:0)      the aggregate number of warrants offered;

(cid:0)      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;

(cid:0)      the exercise price of the warrants;

(cid:0)      the dates or periods during which the warrants are exercisable;

(cid:0)      the designation and terms of any securities with which the warrants are issued;

2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(cid:0)      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;

(cid:0)      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;

(cid:0)      any minimum or maximum amount of warrants that may be exercised at any one time;

(cid:0)      any terms relating to the modification of the warrants;

(cid:0)      any terms, procedures and limitations relating to the transferability, exchange or exercise of the warrants; and

(cid:0)      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:

(cid:0)      title and aggregate principal amount;

(cid:0)      whether the debt securities will be senior, subordinated or junior subordinated;

(cid:0)      applicable subordination provisions, if any;

(cid:0)      provisions regarding whether the debt securities will be convertible or exchangeable into other securities or property of the

Company or any other person;

(cid:0)      percentage or percentages of principal amount at which the debt securities will be issued;

(cid:0)      maturity date(s);

(cid:0)      interest rate(s) or the method for determining the interest rate(s);

3

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(cid:0)      whether interest on the debt securities will be payable in cash or additional debt securities of the same series;

(cid:0)      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;

(cid:0)      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;

(cid:0)      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;

(cid:0)      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;

(cid:0)      authorized denominations;

(cid:0)      form;

(cid:0)      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;

(cid:0)      the place or places where the principal of, premium, if any, and interest on the debt securities will be payable;

(cid:0)      where the debt securities may be presented for registration of transfer, exchange or conversion;

(cid:0)      the place or places where notices and demands to or upon the Company in respect of the debt securities may be made;

(cid:0)      whether the debt securities will be issued in whole or in part in the form of one or more global securities;

(cid:0)      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;

(cid:0)      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;

(cid:0)      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;

(cid:0)      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;

(cid:0)      any covenants applicable to the particular debt securities being issued;

(cid:0)      any defaults and events of default applicable to the debt securities, including the remedies available in connection therewith;

(cid:0)      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

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(cid:0)      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;

(cid:0)      securities exchange(s) on which the debt securities will be listed, if any;

(cid:0)      whether any underwriter(s) will act as market maker(s) for the debt securities;

(cid:0)      extent to which a secondary market for the debt securities is expected to develop;

(cid:0)      provisions relating to defeasance;

(cid:0)      provisions relating to satisfaction and discharge of the indenture;

(cid:0)      any restrictions or conditions on the transferability of the debt securities;

(cid:0)      provisions relating to the modification of the indenture both with and without the consent of holders of debt securities issued

under the indenture;

(cid:0)      any addition or change in the provisions related to compensation and reimbursement of the trustee;

(cid:0)      provisions, if any, granting special rights to holders upon the occurrence of specified events;

(cid:0)      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

(cid:0)      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:

(cid:0)      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;

(cid:0)      any provisions of the governing unit agreement that differ from those described herein; and

(cid:0)      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 333‑218293 and 333‑226097 on Form S‑3 of TG Therapeutics, Inc. of
our  report  dated  March  2,  2020  on  our  audits  of  the  consolidated  financial  statements  of  TG  Therapeutics,  Inc.  and
Subsidiaries as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and
our  report  on  our  audit  of  internal  control  over  financial  reporting  of  TG  Therapeutics,  Inc.  and  Subsidiaries  as  of
December  31,  2019,  dated  March  2,  2020,  included  in  this  Annual  Report  on  Form  10‑K  of  TG  Therapeutics,  Inc.  and
Subsidiaries for the year ended December 31, 2019.

Exhibit 23.1

/s/ CohnReznick LLP

New York, New York
March 2, 2020

 
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 2, 2020

/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 2, 2020

/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, 2019 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 2, 2020

/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, 2019 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 2, 2020

/s/ Sean A. Power
Sean A. Power
Chief Financial Officer
Principal Financial and Accounting Officer