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Arbutus Biopharma Corporation

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FY2020 Annual Report · Arbutus Biopharma Corporation
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

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

For the Fiscal Year Ended December 31, 2020 

or 

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

For the Transition Period from            to

Commission File Number: 001-34949 
Arbutus Biopharma Corporation
(Exact Name of Registrant as Specified in Its Charter)

British Columbia, Canada
(State or Other Jurisdiction of
Incorporation or Organization)

98-0597776
(I.R.S. Employer
Identification No.)

701 Veterans Circle
Warminster
PA
18974
(Address of Principal Executive Offices)

267-469-0914

 (Registrant’s Telephone Number, Including Area Code)

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

Title of Each Class
Common shares, without par value

Trading Symbol(s)
ABUS

Name of Each Exchange on Which Registered
The Nasdaq Stock Market LLC

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

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

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

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes x No o

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

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an
“emerging  growth  company”.  See  the  definitions  of  “large  accelerated  filer,”  “accelerated  filer,”  “smaller  reporting  company,”  and  emerging  growth
company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

Accelerated filer

Non-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. o

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

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

As of June 30, 2020, the last business day of the registrant’s most recently completed second fiscal quarter, the approximate aggregate market value of
voting and non-voting common equity held by non-affiliates of the registrant was $129,686,974 (based on the closing price of $1.82 per share as reported
on the Nasdaq Global Select Market as of that date).

As of March 3, 2021, the registrant had 95,583,915 common shares, without par value, outstanding. In addition, the registrant had outstanding 1,164,000
convertible  preferred  shares,  which  will  be  mandatorily  converted  into  approximately  23  million  common  shares  on  October  18,  2021.    Assuming  the
convertible preferred shares were converted as of March 3, 2021, the registrant would have had approximately 118 million common shares outstanding at
March 3, 2021.

DOCUMENTS INCORPORATED BY REFERENCE

Portions  of  the  registrant’s  definitive  proxy  statement  for  its  2021  Annual  Meeting  of  Shareholders,  which  the  registrant  intends  to  file  pursuant  to
Regulation  14A  with  the  Securities  and  Exchange  Commission  no  later  than  120  days  after  the  registrant’s  fiscal  year  ended  December  31,  2020,  are
incorporated by reference into Part III of this Form 10-K.

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ARBUTUS BIOPHARMA CORPORATION

TABLE OF CONTENTS

Cautionary Note Regarding Forward-looking Statements
Risk Factors Summary

PART I

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

PART II

Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.

PART III

Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV

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

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Selected Consolidated Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures about Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information

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

Item 15.

Exhibits and Financial Statement Schedules

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Cautionary Note Regarding Forward-looking Statements

This  Annual  Report  on  Form  10-K  (this  “Form  10-K”)  contains  “forward-looking  statements”  or  “forward-looking  information”  within  the  meaning  of
applicable United States and Canadian securities laws (we collectively refer to these items as “forward-looking statements”). Forward-looking statements
are  generally  identifiable  by  use  of  the  words  “believes,”  “may,”  “plans,”  “will,”  “anticipates,”  “intends,”  “budgets,”  “could,”  “estimates,”  “expects,”
“forecasts,” “projects” and similar expressions that are not based on historical fact or that are predictions of or indicate future events and trends, and the
negative of such expressions. Forward-looking statements in this Form 10-K, including the documents incorporated by reference, include statements about,
among other things:

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our strategy, future operations, pre-clinical research, pre-clinical studies, clinical trials, prospects and the plans of management;
the potential impact of the COVID-19 pandemic on our business;
the  discovery,  development  and  commercialization  of  a  curative  combination  regimen  for  chronic  hepatitis  B  infection,  a  disease  of  the  liver
caused by the hepatitis B virus (“HBV”);
our beliefs and development path and strategy to achieve a curative combination regimen for HBV;
obtaining necessary regulatory approvals;
obtaining adequate financing through a combination of financing activities and operations;
using  the  results  from  our  HBV  studies  to  adaptively  design  additional  clinical  trials  to  test  the  efficacy  of  the  combination  therapy  and  the
duration of the result in patients;
the expected timing of and amount for payments related to the Enantigen Therapeutics, Inc.’s transaction and its programs;
the  potential  of  our  product  candidates  to  improve  upon  the  standard  of  care  and  contribute  to  a  functional  curative  combination  treatment
regimen;
the potential benefits of the reversion of the Ontario Municipal Employees Retirement System (“OMERS”) royalty monetization transaction for
our ONPATTRO® (Patisiran) (“ONPATTRO”) royalty interest;
developing a suite of products that intervene at different points in the viral life cycle, with the potential to reactivate the host immune system;
using pre-clinical results to adaptively design clinical trials for additional cohorts of patients, testing the combination and the duration of therapy;
selecting combination therapy regimens and treatment durations to conduct Phase 3 clinical trials intended to ultimately support regulatory filings
for marketing approval;
the potential of substantially increasing diagnosis and treatment rates for people with chronic HBV through the introduction of an HBV curative
regimen with a finite duration;
expanding our HBV product candidate pipeline through internal development, acquisitions and in-licenses;
our expectation for additional data from ongoing cohorts of the Phase 1a/1b trial of AB-729 to be available late in the first half of 2021 (other than
initial data from the 90 mg every 12 week cohort, which is expected in the second half of 2021);
our expectation that AB-729 could be combined with our lead capsid inhibitor candidate, AB-836, and approved NAs, in our first combination
therapy for HBV patients;
our  intention  to  initiate  multiple  Phase  2  clinical  trials  with  AB-729,  some  with  one  or  more  investigational  agents,  in  both  the  first  half  and
second half of 2021;
our  expectations  regarding  the  anticipated  trial  design,  timing,  number  of  patients  and  dosing  of  our  Phase  2  clinical  trial  of  Assembly
Biosciences, Inc.’s investigational HBV core inhibitor candidate, also known as a capsid inhibitor, vebicorvir, in combination with our proprietary
GalNAc delivered RNAi therapeutic candidate, AB-729, and standard-of-care nucleos(t)ide reverse transcriptase inhibitor (NrtI) therapy for the
treatment of patients with chronic HBV infection;
the potential for an oral HBsAg-reducing agent and potential all-oral combination therapy;
our expectation for AB-836 to progress into a Phase 1a/1b clinical trial in the first half of 2021 and for us to obtain initial data therefrom in the
second half of 2021;
the potential for AB-836 to have increased potency and an enhanced resistance profile, compared to our previous capsid inhibitor candidate, AB-
506;
the potential for AB-836 to be once-daily dosing;

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•
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•
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•

the potential for AB-79 to have a dosing schedule as infrequently as every 8 to 12 weeks;
our expectation to pursue development of a next generation oral HBV RNA-destabilizer;
the potential for us to discover and/or develop new molecular entities for treating coronaviruses, including COVID-19;
payments from the Gritstone Oncology, Inc. licensing agreement;
the potential for royalty payments from the agreement related to Genevant Sciences Ltd.;
the expected return from strategic alliances, licensing agreements, and research collaborations;
statements with respect to revenue and expense fluctuation and guidance;
having sufficient cash resources to fund our operations through the third quarter of 2022 based on our expectation of a net cash burn between $70
million and $75 million in 2021; and
obtaining  funding  to  maintain  and  advance  our  business  from  a  variety  of  sources  including  public  or  private  equity  or  debt  financing,
collaborative arrangements with pharmaceutical companies, other non-dilutive commercial arrangements and government grants and contracts.

as well as other statements relating to our future operations, financial performance or financial condition, prospects or other future events. Forward-looking
statements appear primarily in the sections of this Form 10-K entitled “Item 1-Business,” “Item 1A-Risk Factors,” “Item 7-Management’s Discussion and
Analysis of Financial Condition and Results of Operations,” “Item 7A-Quantitative and Qualitative Disclosures About Market Risk,” and “Item 8-Financial
Statements and Supplementary Data.”

Forward-looking statements are based upon current expectations and assumptions and are subject to a number of known and unknown risks, uncertainties
and other factors that could cause actual results to differ materially and adversely from those expressed or implied by such statements. Factors that could
cause  or  contribute  to  such  differences  include,  but  are  not  limited  to,  those  discussed  in  this  Form  10-K  and  in  particular  the  risks  and  uncertainties
discussed under “Item 1A-Risk Factors” of this Form 10-K. As a result, you should not place undue reliance on forward-looking statements.

Additionally, the forward-looking statements contained in this Form 10-K represent our views only as of the date of this Form 10-K (or any earlier date
indicated in such statement). While we may update certain forward-looking statements from time to time, we specifically disclaim any obligation to do so,
even if new information becomes available in the future. However, you are advised to consult any further disclosures we make on related subjects in the
periodic and current reports that we file with the Securities and Exchange Commission.

The foregoing cautionary statements are intended to qualify all forward-looking statements wherever they may appear in this Form 10-K. For all forward-
looking statements, we claim protection of the safe harbor for the forward-looking statements contained in the Private Securities Litigation Reform Act of
1995.

This  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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Risk Factors Summary

The following is a summary of the principal risks that could adversely affect our business, operations and financial results. For more information, see “Item
1A. Risk Factors” in this Annual Report on Form 10-K for the year ended December 31, 2020.

Risks Related to Our Business, Our Financial Results and Need for Additional Capital

• We are in the early stages of our development, and there is a limited amount of information about us upon which you can evaluate our product

candidates.

• We will require additional capital to fund our operations, and such capital may be dilutive to shareholders or impose operational restrictions. If
such capital is not available, we may need to delay, limit or eliminate our research, development and commercialization programs and modify our
overall business strategy.

• We have incurred losses in nearly every year since our inception and we anticipate that we will not achieve profits for the foreseeable future. To

date, we have had no product revenues, and we may never be profitable.

•

The COVID-19 coronavirus could adversely impact our business, including our clinical development plans.

Risks Related to Development, Clinical Testing, Regulatory Approval, Marketing, and Coverage and Reimbursement of our Product Candidates

• Our  product  candidates  are  in  early  stages  of  development  and  must  go  through  clinical  trials,  which  are  very  expensive,  time-consuming  and
difficult to design and implement. The outcomes of clinical trials are uncertain, and delays in the completion of or the termination of any clinical
trial of our product candidates could harm our business, financial condition and prospects.

•

•

•

Pre-clinical studies and data during our clinical trials are not necessarily predictive of the results or success of ongoing or later clinical trials. If we
cannot replicate the results from our pre-clinical studies and initial clinical trials, we may be unable to successfully develop and commercialize our
product candidates.

Because  we  have  limited  resources,  we  may  decide  to  pursue  a  particular  product  candidate  and  fail  to  advance  product  candidates  that  later
demonstrate a greater chance of clinical and commercial success.

Several of our current pre-clinical studies and clinical trials are being conducted outside the United States, and the FDA may not accept data from
trials conducted in locations outside the United States.

• We cannot guarantee how long it will take regulatory agencies to review our applications for product candidates, and we may fail to obtain the

necessary regulatory approvals to market our product candidates.

•

If a particular product candidate causes undesirable side effects, then we may be unable to receive regulatory approval of or commercialize such
product candidate.

• We may find it difficult to enroll subjects in our clinical trials, which could delay or prevent our clinical trials.

• Any approved product candidates may be negatively impacted by future development or regulatory difficulties.

• We face significant competition from other biotechnology and pharmaceutical companies targeting HBV.

• We are largely dependent on the future commercial success of our HBV product candidates.

• We may incur substantial liabilities and may be required to limit commercialization of our products.

•

Coverage and adequate reimbursement may not be available for our product candidates, which could make it difficult for us to sell our products
profitably.

• We  are  subject  to  U.S.  and  Canadian  healthcare  laws  and  regulations.  This  could  expose  us  to,  among  other  things,  criminal  sanctions,  civil
penalties, contractual damages, exclusion from participation in government healthcare programs, curtailment or restricting of our operations and
diminished profits and future earnings.

•

Failure to comply with the United States Foreign Corrupt Practices Act, and potentially other global anti-corruption and anti-bribery laws such as
the Canadian Corruption of Foreign Public Officials Act, could subject us to adverse consequences.

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Risks Related to Our Dependence on Third Parties

• We  expect  to  depend  on  our  licensing  agreements  for  a  significant  portion  of  our  revenues  for  the  foreseeable  future  and  to  develop,  conduct
clinical  trials  with,  obtain  regulatory  approvals  for,  and  manufacture,  market  and  sell  some  of  our  product  candidates.  If  these  licensing
agreements are unsuccessful, or anticipated milestone or royalty payments are not received, our business could be materially adversely affected.

• We  are  dependent  on  our  license  agreement  with  Alnylam  Pharmaceuticals,  Inc.  for  the  commercialization  of  ONPATTRO™  (Patisiran).  In
addition,  we  are  dependent  on  Assembly  Biosciences,  Inc.  (“Assembly”)  pursuant  to  our  clinical  collaboration  agreement,  and  as  such  we  are
subject to the efforts of Assembly and our ability to successfully collaborate with Assembly.

•

•

If conflicts arise between our collaboration or licensing partners and us, our collaboration or licensing partners may act in their best interest and
not in our best interest, which could adversely affect our business.

If the third parties we rely on to conduct our clinical trials fail to meet their obligations, perform services satisfactorily, and/or comply with legal
requirements, our development plans may be adversely affected.

• We rely exclusively on third parties to formulate and manufacture our product candidates, which exposes us to a number of risks that may delay

development, regulatory approval and commercialization of our products or result in higher product costs.

Risks Related to Our Intellectual Property

• Other companies may assert patent rights that prevent us from developing or commercializing our products.
• Our patents and patent applications may be challenged and may be found to be invalid.

• We may incur substantial costs as a result of litigation or other proceedings relating to patent and other intellectual property rights which could
have  a  material  adverse  effect  on  our  business,  financial  condition  and  results  of  operations  and  could  cause  the  market  value  of  our  common
shares to decline.

•

Confidentiality agreements with employees and others, including collaborators, may not adequately prevent disclosure of trade secrets and other
proprietary information.

Risks Related to the Ownership of our Common Shares

•

The concentration of common share ownership with insiders, as well as director nomination rights held by the largest shareholder, will likely limit
the ability of the other shareholders to influence corporate matters.

• We are incorporated in Canada, with our assets located both in Canada and the United States, with the result that it may be difficult for investors to

enforce judgments obtained against us or some of our officers.

•

If  we  are  deemed  a  “passive  foreign  investment  company”  for  the  current  or  any  future  taxable  year,  investors  subject  to  U.S.  federal  taxation
would likely suffer materially adverse U.S. federal income tax consequences.

• Our articles and certain Canadian laws could delay or deter a change of control.

General Risk Factors

•

If we are unable to attract and retain qualified key management, scientific staff, consultants and advisors, our ability to implement our business
plan may be adversely affected.

• We could face liability from our use of hazardous and radioactive materials in our research and development processes.

• Our business, reputation, and operations could suffer in the event of information technology system failures.

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• We may acquire other assets or businesses, or form strategic alliances or collaborations or make investments in other companies or technologies
that could harm our financial condition, results of operations or cash flows, dilute our shareholders’ ownership, incur debt or cause us to incur
significant expense.

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Item 1. Business 

Overview

PART I

Arbutus Biopharma Corporation (“Arbutus”, the “Company”, “we”, “us”, and “our”) is a clinical-stage, biopharmaceutical company focused primarily on
developing a cure for people with chronic hepatitis B virus (“HBV”) infection. We are advancing multiple product candidates with distinct mechanisms of
action and we believe the combination of two or more of these product candidates has the potential to provide a new curative regimen for chronic HBV
infection. We have also initiated a drug discovery and development effort for treating coronaviruses, including COVID-19.

Strategy

The core elements of our strategy include:

• Developing a broad portfolio of proprietary therapeutic product candidates that target multiple elements of the HBV viral lifecycle. Our
HBV product pipeline includes RNA interference (“RNAi”) therapeutics, oral capsid inhibitors, oral HBV RNA destabilizer compounds and oral
compounds  that  inhibit  PD-L1  with  the  intention  of  reawakening  patients’  HBV-specific  immune  response.  We  believe  that  suppressing  HBV
DNA replication and hepatitis B surface antigen (“HBsAg”) expression as well as reawakening patients’ HBV-specific immune response are the
most  important  elements  to  achieving  a  functional  cure.  We  define  a  functional  cure  as  unquantifiable  plasma  HBV  DNA  and  HBsAg  levels
greater than six months after end of therapy with or without quantifiable anti-HBsAg antibodies.

Our  two  lead  product  candidates  are  AB-729,  our  proprietary  subcutaneously-delivered  RNAi  product  candidate  that  suppresses  HBsAg
expression, which is thought to be a key prerequisite to enable reawakening of a patient’s immune system to respond to HBV, and AB-836, our
proprietary next-generation oral capsid inhibitor that suppresses HBV DNA replication.

AB-729 is currently in an ongoing Phase 1a/1b clinical trial. We have announced positive preliminary results from several single and multi-dose
cohorts of subjects with chronic HBV infection, which have demonstrated that treatment with AB-729 resulted in meaningful declines in HBsAg
while being well tolerated with no serious adverse events noted after both single and repeat dosing. We expect to provide additional data from
ongoing cohorts of this Phase 1a/1b clinical trial in the first half of 2021, except for initial data from the 90 mg every 12-week cohort which is
expected in the second half of 2021.

We expect AB-836 to progress into a Phase 1a/1b clinical trial in the first half of 2021 with initial data anticipated in the second half of 2021. AB-
836 is from a novel chemical series differentiated from competitor compounds and has the potential to provide increased efficacy and an enhanced
resistance profile.

Additionally,  we  are  in  lead  optimization  with  oral  compounds  that  inhibit  PD-L1  with  the  intention  of  reawakening  patients’  HBV-specific
immune response and next-generation oral HBV RNA destabilizer compounds that are designed to destabilize and ultimately degrade HBV RNAs
resulting in the reduction of HBsAg.

• Creating combinations of therapeutic product candidates with complementary mechanisms of action designed to provide a functional cure
for people with chronic HBV infection. We believe that our proprietary product candidates AB-729 and AB-836, along with existing approved
therapies, may be combined into our first combination therapy for people with chronic HBV infection. Additionally,  through  our  collaboration
with  Assembly  Biosciences,  Inc.  (“Assembly”),  screening  has  initiated  for  a  Phase  2  proof-of-concept  clinical  trial  with  AB-729,  our  RNAi
product  candidate,  in  combination  with  Assembly’s  lead  HBV  core  inhibitor  (capsid  inhibitor)  product  candidate,  vebicorvir  (“VBR”),  and
nucleos(t)ide analog (“NA”) therapy for the treatment of people with chronic HBV infection. We also intend to initiate two Phase 2 clinical trials
with AB-729, both with one or more approved or investigational agents, in the second half of 2021.

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• Advancement  of  an  internal  research  program  focused  on  identifying  new  small  molecule  antiviral  medicines  to  treat  COVID-19  and
future coronavirus outbreaks. This program is focused on the discovery and development of new molecular entities for treating coronaviruses
(including COVID-19) that address specific viral targets including the nsp12 viral polymerase and the nsp5 viral protease.

Background

HBV

Hepatitis B is a potentially life-threatening liver infection caused by HBV. HBV can cause chronic infection which leads to a higher risk of death from
cirrhosis and liver cancer. Chronic HBV infection represents a significant unmet medical need. There are HBV vaccines approved by the FDA, which are
indicated for the prevention of infection caused by HBV. However, the World Health Organization estimates that over 250 million people worldwide suffer
from chronic HBV infection, while other estimates indicate that approximately 2 million people in the United States suffer from chronic HBV infection.
Even with the availability of effective vaccines and current treatment options, approximately 900,000 people die every year from complications related to
chronic HBV infection. We believe there is a compelling market opportunity for an HBV curative regimen. Currently, an estimated 27 million (10.5%) of a
total of over 250 million people worldwide with chronic HBV infection are diagnosed and approximately 4.5 million (1.8%) are on treatment. We believe
that the introduction of an HBV curative regimen with a finite duration would substantially increase diagnosis and treatment rates for people with chronic
HBV.

Current treatments and their limitations

Today’s current treatment options for chronic HBV infection include pegylated interferon-α regimens (“Peg-IFNα”) and nucleos(t)ide analogues (“NAs”).
Peg-IFNα, a synthetic version of a substance produced by the body to fight infection, is administered by injection and has numerous side effects including
flu-like symptoms and depression. NAs are oral antiviral medications which, when taken chronically, reduce HBV virus replication and inflammation and
significantly reduce HBV DNA in the blood. Oral NAs have become the standard-of-care for HBV treatment, mainly due to their ability to drive viral load
to undetectable levels in the serum of patients, easy single pill once-a-day dosing and favorable safety profile. However, in most cases, once Peg-IFNα and
NA therapies are stopped, virus replication resumes and liver inflammation and fibrosis may still progress. While these treatments reduce viral load, less
than 5% of patients are functionally cured after a finite treatment duration. With such low cure rates, most patients with chronic HBV infection are required
to take NA therapy daily for the rest of their lives.

HBV Lifecycle and Key Points for Intervention

The viral lifecycle of HBV is shown below. Given the biology of HBV, we believe combination therapies are the key to more effective HBV treatment and
a potential functional cure. Our product pipeline includes multiple product candidates that target various steps in the viral lifecycle. We believe each of
these  mechanisms,  when  administered  for  a  finite  duration  in  combination  with  existing  approved  therapies,  have  the  potential  to  improve  upon  the
standard of care and potentially lead to a functional cure.

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1. NAs:  NAs  work  by  inhibiting  HBV  DNA  polymerase  activity  and  suppressing  HBV  replication.  However,  NAs  functionally  cure  only  a  small

percentage of patients and typically require chronic dosing to maintain their benefits, which can be challenging for patients.

2. Capsid  inhibitor  (AB-836):  this  orally-delivered  product  candidate  has  the  potential  to  inhibit  HBV  replication  by  preventing  the  assembly  of
functional viral capsids. HBV  core  protein  assembles  into  a  capsid  structure,  which  is  required  for  viral  replication.  The  current  standard-of-care
therapy  for  HBV,  primarily  NAs  that  work  by  inhibiting  the  viral  polymerase,  significantly  reduce  virus  replication,  but  not  completely.  Capsid
inhibitors inhibit replication by destabilizing core particle assembly or disassembly. Capsid inhibitors also have been shown to inhibit the uncoating
step of the viral life cycle thus reducing the formation of new covalently closed circular DNA ("cccDNA"), the viral reservoir which resides in the
cell nucleus and which is believed to play a role in viral persistence.

3. RNAi (AB-729): this subcutaneously-delivered RNAi therapeutic product candidate targeted to hepatocytes uses our novel covalently conjugated N-
acetylgalactosamine (“GalNAc”) delivery technology. AB-729 inhibits viral replication and reduces all HBV antigens, including HBsAg. Reducing
HBsAg is thought to be a key prerequisite to enable reawakening of a patient’s immune system to respond to the virus.

HBV RNA destabilizers: these small molecule orally active agents cause the destabilization and ultimate degradation of HBV RNAs. These agents
result  in  the  reduction  of  HBsAg  and  other  viral  proteins  in  both  whole  cell  systems  and  animal  models.  They  have  the  potential  to  selectively
impact HBV versus other RNA or DNA viruses and demonstrate pangenotypic characteristics. HBV RNA destabilizers have demonstrated additive
effects  in  combination  with  other  mechanism  of  action  anti-HBV  agents.  HBV  RNA  destabilizers  have  the  potential  to  complement  or  replace
subcutaneously delivered RNAi agents with an oral therapy in combination with a capsid inhibitor and an approved NA.

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Our Product Pipeline

Our HBV product pipeline consists of the following programs:

In  addition  to  our  HBV  product  pipeline,  we  have  an  internal  research  program  focused  on  identifying  new  small  molecule  antiviral  medicines  to  treat
COVID-19 and future coronavirus outbreaks.

We continue to explore expansion of our HBV pipeline through internal discovery and development and potential strategic alliances.

Our Product Candidates

GalNAc RNAi (AB-729)

RNAi  therapeutics  represent  a  recent  significant  advancement  in  drug  development.  RNAi  therapeutics  utilize  a  natural  pathway  within  cells  to  silence
genes by eliminating the disease-causing proteins that they code for. We are developing RNAi therapeutics that are designed to reduce HBsAg expression
and  other  HBV  antigens  in  people  chronically  infected  with  HBV.  Reducing  HBsAg  is  widely  believed  to  be  a  key  prerequisite  to  enable  a  patient’s
immune system to reawaken and respond against the virus.

AB-729 is a subcutaneously-delivered RNAi therapeutic targeted to hepatocytes using our proprietary covalently conjugated GalNAc delivery technology.
AB-729 reduces all HBV antigens and inhibits viral replication. In July 2019, we initiated a single- and multi-dose Phase 1a/1b clinical trial for AB-729,
designed to investigate the safety, tolerability, pharmacokinetics, and pharmacodynamics of AB-729 in healthy volunteers and in chronic HBV subjects and
determine the most appropriate doses and dosing intervals to take forward into Phase 2 clinical development.

The ongoing first-in-human clinical trial of AB-729 consists of three parts:

•

•

In Part 1, three cohorts of healthy volunteers were randomized 4:2 to receive single doses (60 mg, 180 mg or 360 mg) of AB-729 or placebo.

In Part 2, non-cirrhotic, hepatitis B e-antigen (“HBeAg”) positive or negative chronic HBV subjects (n=6) currently taking NA therapy with HBV
DNA below the limit of quantitation received single doses (60 mg to 180 mg) of AB-729. An additional cohort in Part 2 included 90 mg single-
dose of AB-729 in HBV DNA positive chronic HBV subjects (n=6).

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•

In Part 3, chronic HBV subjects, HBV DNA negative first and HBV DNA positive later, receive multiple doses of AB-729 for up to six months.
Upon completion of six months of dosing, so far, all subjects in the 60 mg dose every 4 weeks and 60 mg dose every 8 weeks cohorts have elected
the option to reconsent and receive an additional six months of dosing for a total of 48 weeks.

Part 1 of the trial, which dosed healthy volunteers, was completed and supported advancing doses ranging from 60 mg to 180 mg into Part 2. We expect
Part 2, which dosed subjects with chronic HBV infection with single doses of AB-729, to complete its 48 weeks of follow-up period in the first half of
2021. Additionally, several cohorts in Part 3 have received multiple doses of AB-729. Results to date demonstrate that treatment of AB-729 has been safe
and well tolerated. Efficacy results to date suggest that:

•

•

•

•

Single doses of 60 mg, 90 mg and 180 mg resulted in comparable mean HBsAg declines at week 12 followed by a sustained plateau phase (-0.99
log10 IU/mL vs -1.23 log10 IU/mL, vs -1.10 log10 IU/mL, respectively)

Repeat dosing using the 60 mg dose every 4 weeks resulted in a continuous and robust mean HBsAg decline at week 16 (-1.44 log10 IU/mL, N=7)
and continued through week 24 (-1.84 log10 IU/mL, N=7)

Repeat dosing using the 60 mg dose every 8 weeks resulted in comparable mean HBsAg declines relative to the 60 mg dose every 4 weeks at
week 16 (-1.39 log10 IU/mL vs -1.44 log10 IU/mL, p<0.7, respectively)

In HBV DNA positive HBV subjects, a single 90 mg dose resulted in robust mean declines in HBsAg (-1.02 log10 IU/mL) and HBV DNA (-1.53
log10 IU/mL) at week 12, as well as decreases in HBV RNA and core-related antigen

–
–

Similar mean HBsAg reductions were observed in HBV DNA positive and negative chronic HBV subjects
These findings support complete target engagement by AB-729

We expect to provide additional data from ongoing cohorts of the Phase 1a/1b clinical trial in the first half of 2021, including additional data from the 60
mg multi-dose cohort (4 week and 8 week dosing intervals), initial data from the 90 mg multi-dose cohort (8 week dosing interval), and initial data from
the 90 mg multi-dose cohort (8 week dosing interval) in HBV DNA positive subjects. We expect initial data from the 90 mg every 12-week dosing interval
cohort to be available in the second half of 2021. Additionally, we intend to advance AB-729 into two Phase 2 combination clinical trials with one or more
approved or investigational agents in the second half of 2021 with dosing of AB-729 as infrequently as every 8 or 12 weeks.

Collaboration with Assembly

In August 2020, we entered into a clinical collaboration agreement with Assembly to evaluate AB-729 in combination with Assembly’s lead HBV core
inhibitor (capsid inhibitor) candidate vebicorvir (“VBR”) and standard-of-care NA therapy for the treatment of subjects with chronic HBV infection. Under
the  terms  of  the  agreement,  this  trial  will  be  a  randomized,  multi-center,  open-label  Phase  2  proof-of-concept  clinical  trial  that  will  evaluate  the  safety,
pharmacokinetics, and antiviral activity of the triple combination of AB-729, VBR, and an NA compared to the double combinations of VBR with an NA
and AB-729 with an NA. We expect to enroll approximately 60 virologically-suppressed subjects with HBeAg negative chronic HBV infection in the first
cohort of this trial. Patients will be dosed for 48 weeks with AB-729 60 mg subcutaneously every 8 weeks and VBR 300 mg orally once daily, with a 48-
week follow-up period. We and Assembly recently initiated screening for this clinical trial. We and Assembly will share in the costs of the collaboration.
Under  the  terms  of  the  collaboration,  we  and  Assembly  may  also  add  additional  cohorts  in  the  future  to  evaluate  other  patient  populations  and/or
combinations. Except  to  the  extent  necessary  to  carry  out  Assembly’s  responsibilities  with  respect  to  the  collaboration  trial,  we  have  not  provided  any
license grant to Assembly for use of our AB-729 compound.

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Oral Capsid Inhibitors (AB-836)

HBV core protein assembles into a capsid structure, which is required for viral replication. The current commercially available therapies (NAs or Peg-IFN)
significantly reduce HBV DNA levels in the serum, but HBV replication continues in the liver, thereby enabling HBV infection to persist. More effective
therapies  for  patients  require  new  agents  which  will  further  block  viral  replication.  We  are  developing  capsid  inhibitors  (also  known  as  core  protein
inhibitors) as oral therapeutics which, in combination with NAs, could further reduce HBV replication. By inhibiting assembly of functional viral capsids,
the ability of HBV to replicate is impaired. Capsid inhibitor molecules also inhibit the uncoating step of the viral life cycle and thus reduce the formation of
cccDNA, the viral reservoir which resides in the cell nucleus, and which is believed to play a role in viral persistence.

Our oral capsid inhibitor discovery effort generated promising next-generation compounds, which led to the nomination of AB-836 in January 2020. AB-
836 is a novel chemical series differentiated from competitor compounds with the potential for increased efficacy and an enhanced resistance profile. AB-
836 leverages a novel binding site within the core protein dimer-dimer interface, has shown to be active against NA resistant variants and has the potential
to address certain known capsid resistant variants. AB-836 is anticipated to be combinable with other mechanisms of action and is also anticipated to be
dosed once daily. We completed CTA/IND-enabling studies for AB-836 in the fourth quarter of 2020 and anticipate initiating a Phase 1a/1b clinical trial for
AB-836 in the first half of 2021 with initial data expected in the second half of 2021.

Oral PD-L1 Inhibitors

PD-L1 inhibitors complement our pipeline of agents and could potentially be an important part of a combination therapy for the treatment of HBV. Highly
functional HBV-specific T cells within our immune system are believed to be required for long-term HBV viral resolution. However, HBV-specific T cells
become  functionally  defective,  and  greatly  reduced  in  their  frequency  during  chronic  HBV  infection.  One  approach  to  boost  HBV-specific  T  cells  is  to
prevent PD-L1 proteins from attaching to and inhibiting the HBV-specific T cells. We are in lead optimization with oral compounds which are potentially
capable of reawakening patients’ HBV-specific immune response by inhibiting PD-L1.

Oral HBV RNA Destabilizers

HBV RNA destabilizers are small molecule orally available agents that cause the destabilization and ultimate degradation of HBV RNAs. These agents
result in the reduction of HBsAg and other viral proteins in both whole cell systems and animal models. They have the potential to selectively impact HBV
versus  other  RNA  or  DNA  viruses  and  demonstrate  pangenotypic  characteristics.  HBV  RNA  destabilizers  have  demonstrated  additive  effects  in
combination with other anti-HBV mechanisms of action. HBV RNA destabilizers have the potential to complement or replace subcutaneously delivered
RNAi agents, such as AB-729, with an oral therapy in combination with a capsid inhibitor and an approved NA. We continue to advance next-generation
oral HBV RNA-destabilizers through lead optimization.

COVID-19 Research Efforts

While our core mission is to find a cure for HBV, the magnitude of the coronavirus pandemic is undeniable. Given our proven expertise in the discovery of
new antiviral therapies, we initiated a drug discovery effort for treating coronaviruses, including COVID-19, in 2020. To that end, we have assembled an
internal team of expert scientists under the direction of our Chief Scientific Officer, Dr. Michael Sofia, to identify novel small molecule therapies to treat
COVID-19 and future coronavirus outbreaks. Dr. Sofia, who was awarded the Lasker-DeBakey Award for his discovery of sofosbuvir, brings extensive
antiviral drug discovery experience to this new program. We are also a member of the COVID R&D consortium to address the SARS-CoV-2 pandemic and
any future coronavirus outbreaks. At this time, our COVID-19 research program is focused on the discovery and development of new molecular entities
that address specific viral targets including the nsp12 viral polymerase and the nsp5 viral protease. These targets are essential viral proteins which we have
experience in targeting. We are actively screening multiple new oral molecular entities.

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COVID-19 Impact

In December 2019, an outbreak of a novel strain of coronavirus (COVID-19) was identified in Wuhan, China. This virus continues to spread globally, has
been declared a pandemic by the World Health Organization and has spread to nearly every country in the world. The impact of this pandemic has been,
and will likely continue to be, extensive in many aspects of society. The pandemic has resulted in and will likely continue to result in significant disruptions
to businesses. A number of countries and other jurisdictions around the world have implemented extreme measures to try and slow the spread of the virus.
These measures include the closing of businesses and requiring people to stay in their homes, the latter of which raises uncertainty regarding the ability to
travel to hospitals in order to participate in clinical trials. Additional measures that have had, and will likely continue to have, a major impact on clinical
development, at least in the near-term, include shortages and delays in the supply chain, and prohibitions in certain countries on enrolling subjects in new
clinical  trials.  Future  disruptions  related  to  the  COVID-19  pandemic  could  negatively  impact  our  plans  and  timelines  in  2021  and  beyond,  including
enrolling and monitoring subjects in our clinical trials.

Collaborations and Royalty Entitlements

Collaboration with Assembly

In  August  2020,  we  entered  into  a  clinical  collaboration  agreement  with  Assembly  to  evaluate  AB-729  in  a  Phase  2  proof-of-concept  clinical  trial  in
combination with Assembly’s lead HBV core inhibitor (capsid inhibitor) candidate VBR and standard-of-care NA therapy for the treatment of patients with
chronic HBV infection. We and Assembly have initiated screening and will share in the costs of the collaboration.

Alnylam Pharmaceuticals, Inc. and Acuitas Therapeutics, Inc.

We have two royalty entitlements to Alnylam’s global net sales of ONPATTRO.

In  2012,  we  entered  into  a  license  agreement  with  Alnylam  that  entitles  Alnylam  to  develop  and  commercialize  products  with  our  lipid  nanoparticle
(“LNP”) delivery technology. Alnylam’s ONPATTRO, which represents the first approved application of our LNP technology, was approved by the United
States  Food  and  Drug  Administration  (“FDA”)  and  the  European  Medicines  Agency  (“EMA”)  during  the  third  quarter  of  2018  and  was  launched  by
Alnylam immediately upon approval in the United States. Under the terms of this license agreement, we are entitled to tiered royalty payments on global
net sales of ONPATTRO ranging from 1.00% - 2.33% after offsets, with the highest tier applicable to annual net sales above $500 million. This royalty
interest was sold to the Ontario Municipal Employees Retirement System (“OMERS”), effective as of January 1, 2019, for $20 million in gross proceeds
before advisory fees. OMERS will retain this entitlement until it has received $30 million in royalties, at which point 100% of this royalty entitlement on
future  global  net  sales  of  ONPATTRO  will  revert  to  us.  OMERS  has  assumed  the  risk  of  collecting  up  to  $30  million  of  future  royalty  payments  from
Alnylam and we are not obligated to reimburse OMERS if they fail to collect any such future royalties. If this royalty entitlement reverts to us, it has the
potential to provide an active royalty stream or to be otherwise monetized again in full or in part. From the inception of the royalty sale through December
31, 2020, an aggregate of $5.1 million of royalties have been collected by OMERS.

We also have rights to a second, lower royalty interest on global net sales of ONPATTRO originating from a settlement agreement and subsequent license
agreement  with  Acuitas  Therapeutics,  Inc.  (“Acuitas”).  This  royalty  entitlement  from  Acuitas  has  been  retained  by  us  and  was  not  part  of  the  royalty
entitlement sale to OMERS.

Genevant Sciences, Ltd.

In  April  2018,  we  entered  into  an  agreement  with  Roivant  Sciences  Ltd.  (“Roivant”),  our  largest  shareholder,  to  launch  Genevant  Sciences  Ltd.
(“Genevant”), a company focused on the discovery, development, and commercialization of a broad range of RNA-based therapeutics enabled by our LNP
and ligand conjugate delivery technologies. We licensed exclusive rights to our LNP and ligand conjugate delivery platforms to Genevant for RNA-based
applications outside of HBV, except to the extent certain rights had already been licensed to other third parties (the “Genevant License”). We retained all
rights to our LNP and conjugate delivery platforms for HBV. Under the Genevant License, we are entitled to receive tiered low single-digit

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royalties  on  future  sales  of  Genevant  products  covered  by  the  licensed  patents.  If  Genevant  sub-licenses  the  intellectual  property  licensed  by  us  to
Genevant, we are entitled to receive under the Genevant License, upon the commercialization of a product developed by such sub-licensee, the lesser of (i)
twenty percent of the revenue received by Genevant for such sublicensing and (ii) tiered low single-digit royalties on product sales by the sublicensee.

On July 23, 2020, the United States Patent and Trademark Office before the Patent Trial and Appeal Board (“PTAB”) announced its decision in Moderna
Therapeutics,  Inc.'s  (“Moderna”)  challenge  of  the  validity  of  U.S.  Patent  8,058,069  (“the  ‘069  Patent”).  In  this  decision,  the  PTAB  determined  no
challenged  claims  were  unpatentable.  On  September  23,  2020,  Moderna  appealed  the  ‘069  Patent  decision  to  the  Federal  Circuit  Court  of  Appeals.
Moderna filed its opening brief in that appeal on February 23, 2021, and our responsive brief is due on May 4, 2021. While we are the patent holder, this
patent has been licensed to Genevant. The ‘069 Patent was included in the exclusive rights licensed by us to Genevant under the Genevant License.

On July 31, 2020, Roivant recapitalized Genevant through an equity investment and conversion of previously issued convertible debt securities held by
Roivant. We participated in the recapitalization of Genevant with an equity investment of $2.5 million. In connection with the recapitalization, the three
parties entered into an Amended and Restated Shareholders Agreement that provides Roivant with substantial control of Genevant. We have a non-voting
observer  seat  on  Genevant’s  Board  of  Directors.  As  of  December  31,  2020,  we  owned  approximately  16%  of  the  common  equity  of  Genevant  and  the
carrying value of our investment in Genevant was zero. Our entitlement to receive future royalties or sublicensing revenue under the Genevant License was
not impacted by the recapitalization.

Gritstone Oncology, Inc.

In  October  2017,  we  entered  into  a  license  agreement  with  Gritstone  Oncology,  Inc.  (“Gritstone”)  that  granted  Gritstone  a  worldwide  license  to  our
portfolio  of  proprietary  and  clinically  validated  LNP  technology  and  associated  intellectual  property  to  deliver  Gritstone’s  self-replicating,  non-mRNA,
RNA-based  neoantigen  immunotherapy  products.  Gritstone  paid  us  an  upfront  payment,  and  is  obligated  to  make  payments  to  us  for  achievement  of
development, regulatory, and commercial milestones, as well as royalties (which Genevant has a right to 50% of such royalty payments under the Genevant
License).

Potential Additional Payments Related to the Acquisition of Enantigen Therapeutics, Inc.

In October 2014, Arbutus Inc., our wholly-owned subsidiary, acquired all of the outstanding shares of Enantigen Therapeutics, Inc. (“Enantigen”) pursuant
to  a  stock  purchase  agreement.  The  amount  paid  to  Enantigen’s  selling  shareholders  could  be  up  to  an  additional  $102.5  million  in  sales  performance
milestones in connection with the sale of the first commercialized product by us for the treatment of HBV, regardless of whether such product is based upon
assets  acquired  under  this  agreement,  and  a  low  single-digit  royalty  on  net  sales  of  such  first  commercialized  HBV  product,  up  to  a  maximum  royalty
payment of $1.0 million that, if paid, would be offset against our performance milestone payment obligations.

Patents and Proprietary Rights

Our commercial success depends in part on our ability to obtain and maintain proprietary protection for our product candidates, novel discoveries, product
development technologies and other know-how, to operate without infringing on the proprietary rights of others and to prevent others from infringing our
proprietary rights. Our policy is to seek to protect our proprietary position by, among other methods, filing or in licensing United States and foreign patents
and patent applications related to our proprietary technology, inventions and improvements that are important to the development and implementation of
our business. We also rely on trademarks, trade secrets, know how, continuing technological innovation and potential in licensing opportunities to develop
and maintain our proprietary position.

In addition to our proprietary expertise, we own a portfolio of patents and patent applications directed to HBV core/capsid protein assembly inhibitors,
HBV surface antigens secretion inhibitors, LNP inventions, LNP compositions for delivering nucleic acids such as mRNA and RNAi, the formulation and
manufacture  of  LNP-based  pharmaceuticals,  chemical  modification  of  RNAi  molecules,  and  RNAi  drugs  and  processes  directed  at  particular  disease
indications. In the United States our patents might be challenged by inter parte review or opposition proceedings. In Europe, upon grant, a period of nine
months is allowed for notification of opposition to such granted patents.  If our patents are subjected to inter parte review or opposition

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proceedings,  we  would  incur  significant  costs  to  defend  them.  Further,  our  failure  to  prevail  in  any  such  proceedings  could  limit  the  patent  protection
available to our therapeutic HBV programs or RNAi platform, including our product candidates.

We  have  a  portfolio  of  approximately  55  patent  families,  in  the  United  States  and  abroad,  that  are  directed  to  our  therapeutic  HBV  product  candidates,
HBV technology and various aspect of LNPs and LNP formulations. The portfolio includes approximately 150 issued patents throughout the world and an
extensive portfolio of pending patent applications. The  earliest  any  of  the  material  patents  with  respect  to  our  current  product  candidates  will  expire  is
2037.

Human Capital

We are committed to an inclusive culture that values equality, opportunity, and respect. We seek to secure and develop top talent with a diversity of thought,
experiences and backgrounds. Drug development is a complex endeavor that requires deep expertise and attracting and retaining qualified employees for
specialized  biopharmaceutical  positions  is  very  competitive.  Our  compensation  programs  are  designed  to  attract  and  retain  top  talent.  We  offer  every
employee a total compensation package consisting of base salary, cash target bonus targeting the 50th to 75th percentile of market based on geography and
company  size,  a  comprehensive  benefit  package  and  equity  compensation  for  every  employee.  Bonus  opportunity  and  equity  compensation  generally
increase as a percentage of total compensation based on level of responsibility. Actual bonus payout is based on performance. We also provide eligible
employees  the  opportunity  to  participate  in  our  employee  stock  purchase  plan  and  wellness  programs  to  allow  our  employees  to  maintain  a  work/life
balance while striving to achieve company objectives.

We are invested in the development of our employees, including performance management and mentorship programs. In 2020, we experienced our lowest
turnover  in  the  previous  five  years.  Given  our  financial  resources  and  our  track  record,  we  continue  to  be  successful  in  filling  vacated  positions  and  in
supporting our expanding pipeline of research programs and product candidates. We supplement our in-house expertise with outsourced capabilities when it
would  be  cost  prohibitive  to  build  our  own  in-house  capabilities.  For  example,  we  outsource  a  substantial  portion  of  our  clinical  trial  work  to  clinical
research organizations and a majority of our drug manufacturing to contract manufacturers. Our in-house clinical development and manufacturing teams
implement our HBV development strategies and oversee the activities of our outside vendors.

At December 31, 2020, Arbutus had 78 employees (76 full-time and 2 part-time), 57 of whom were engaged in research and development, including three
medical doctors, 30 individuals with Doctors of Philosophy (PhDs) degrees, and eight scientists with Master of Science degrees. Substantially all of our
employees work out of our corporate headquarters in Warminster, PA. None of our employees are represented by a labor union or covered by a collective
bargaining agreement, nor have we experienced any work stoppages. We believe that relations with our employees are good.

During  the  COVID-19  pandemic,  fewer  than  half  of  our  employees  have  continued  to  work  at  our  facilities,  where  we  have  adopted  health  screening,
implemented social distancing and personal protective equipment requirements, enhanced cleaning and sanitation procedures, and modified workspaces to
reduce the potential for disease transmission. Our employees who do not require access to our facility to perform their work have been working from home
during the pandemic. The change in protocols and working arrangements have not had a significant impact on productivity.

Competition

We face a broad range of current and potential competitors, from established global pharmaceutical companies with significant resources, to research-stage
companies.  In  addition,  we  face  competition  from  academic  and  research  institutions  and  government  agencies  for  the  discovery,  development  and
commercialization of novel therapeutics to treat HBV. Many of our competitors, either alone or with their collaborative partners, have significantly greater
financial, product development, technical, manufacturing, sales, and marketing resources than we do. In addition, many of our direct competitors are large
pharmaceutical  companies  with  internal  research  and  development  departments  that  have  significantly  greater  experience  in  testing  product  candidates,
obtaining FDA and other regulatory approvals of product candidates, and achieving widespread market acceptance for those products.

As  a  significant  unmet  medical  need  exists  for  HBV,  there  are  several  large  and  small  pharmaceutical  companies  focused  on  delivering  singular  or
combinations of therapeutics for the treatment of HBV. These companies include, but are not limited to Johnson & Johnson, Roche, Vir Biotechnology,
GlaxoSmithKline, Gilead Sciences, Assembly, Dicerna Pharmaceuticals, Replicor, Enanta Pharmaceuticals and Aligos Therapeutics. These companies are
developing products such as capsid

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inhibitors, RNAi agents, immune modulators, surface antigen inhibitors, and gene editing agents. These product candidates are in various stages of pre-
clinical and clinical development. Further, in addition to current investigational therapeutics in development, it is likely that additional drugs will become
available in the future for the treatment of HBV.

We  anticipate  that  we  will  face  competition  as  new  products  enter  the  marketplace  Our  competitors’  products  may  be  safer,  more  effective,  or  more
effectively  marketed  and  sold  than  any  product  we  may  commercialize.  Competitive  singular  or  combination  products  may  render  one  or  more  of  our
product candidates obsolete or non-competitive before we can recover the expenses of developing and commercializing any of our product candidates. It is
also  possible  that  the  development  of  a  cure  or  new  treatment  methods  for  HBV  could  render  one  or  more  of  our  product  candidates  non-competitive,
obsolete, or reduce the demand for our product candidates.

We  believe  that  our  ability  to  compete  depends,  in  part,  upon  our  ability  to  develop  products,  successfully  complete  the  clinical  trials  and  regulatory
approval processes, and effectively market any approved products. Further, we need to attract and retain qualified personnel, obtain patent protection or
otherwise develop proprietary product candidates or processes, and secure sufficient capital resources for the substantial time period between the discovery
of lead compounds and their commercial sales, if any.

Manufacturing

We currently rely on third-party manufacturers to supply drug substance and drug products, including AB-729 and AB-836, for our ongoing and anticipated
clinical trials and non-clinical studies. We currently have no plans to establish any large-scale internal manufacturing facilities for our product candidates.

Government Regulation

Regulation by governmental authorities in the United States and in other countries is a significant consideration in our product development, manufacturing
and, if our product candidates are approved, marketing strategies. We expect that all our product candidates will require regulatory approval by the FDA
and  by  similar  regulatory  authorities  in  foreign  countries  prior  to  commercialization  and  will  be  subjected  to  rigorous  pre-clinical,  clinical,  and  post-
approval testing to demonstrate safety and effectiveness, as well as other significant regulatory requirements and restrictions in each jurisdiction in which
we would seek to market our products. In the United States, we are subject to extensive regulation by the FDA and other federal, state, and local regulatory
agencies. United States federal laws, such as the Federal Food, Drug, and Cosmetic Act (“FD&C Act”), and regulations govern the testing, development,
manufacture, quality control, safety, effectiveness, approval, storage, labeling, record keeping, reporting, distribution, import, export, sale, and marketing of
all  biopharmaceutical  products  intended  for  therapeutic  purposes.  We  believe  that  we  and  the  third  parties  that  work  with  us  are  in  compliance  in  all
material respects with currently applicable laws, rules and regulations; however, any failure to comply could have a material negative impact on our ability
to successfully develop and commercialize our products, and therefore on our financial performance. In addition, the laws, rules and regulations that apply
to our business are subject to change and it is difficult to foresee whether, how, or when such changes may affect our business.

Obtaining governmental approvals to market our product candidates and maintaining ongoing compliance with applicable federal, state, local and foreign
statutes and regulations following any such approvals will require the expenditure of significant financial and human resources.

Development and Approval

The process to develop and obtain approval for biopharmaceutical products for commercialization in the United States and many other countries is lengthy,
complex and expensive, and the outcome is far from certain. Although foreign requirements for conducting clinical trials and obtaining approval may differ
in certain respects from those in the United States, there are many similarities and they often are equally rigorous and the outcome cannot be predicted with
confidence. A  key  component  of  any  submission  for  approval  in  any  jurisdiction  is  pre-clinical  and  clinical  data  demonstrating  the  product  candidate’s
safety and effectiveness.

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Pre-clinical Testing. Before testing any product candidate in humans in the United States, a company must develop pre-clinical data, generally including
laboratory evaluation of the product candidate’s chemistry and formulation, as well as toxicological and pharmacological studies in animal species to assess
safety and quality. Certain types of animal studies must be conducted in compliance with the FDA’s Good Laboratory Practice (“GLP”) regulations and the
Animal Welfare Act, which is enforced by the Department of Agriculture.

IND Application. A person or entity sponsoring clinical trials in the United States to evaluate a product candidate’s safety and effectiveness must submit to
the FDA, prior to commencing such trials, an investigational new drug (“IND”) application, which contains, among other data and information, pre-clinical
testing results and provides a basis for the FDA to conclude that there is an adequate basis for testing the drug in humans. If the FDA does not object to the
IND application within 30 days of submission, the clinical testing proposed in the IND may begin. Even after the IND has gone into effect and clinical
testing has begun, the FDA may put the clinical trials on “clinical hold,” suspending (or in some cases, ending) them because of safety concerns or for other
reasons.

Clinical  Trials.  Clinical  trials  involve  administering  a  product  candidate  to  human  volunteers  or  patients  under  the  supervision  of  a  qualified  clinical
investigator.  Clinical  trials  are  subject  to  extensive  regulation.  In  the  United  States,  this  includes  compliance  with  the  FDA’s  bioresearch  monitoring
regulations  and  current  good  clinical  practices  (“GCP”)  requirements,  which  establish  standards  for  conducting,  recording  data  from,  and  reporting  the
results of clinical trials, with the goals of assuring that the data and results are credible and accurate and that study participants’ rights, safety and well-
being  are  protected.  Each  clinical  trial  must  be  conducted  under  a  protocol  that  details,  among  other  things,  the  study  objectives  and  parameters  for
monitoring safety and the efficacy criteria, if any, to be evaluated. The protocol is submitted to the FDA as part of the IND and reviewed by the agency.
Additionally, each clinical trial must be reviewed, approved and conducted under the auspices of an Institutional Review Board (“IRB”). The sponsor of a
clinical trial, the investigators and IRBs each must comply with requirements and restrictions that govern, among other things, obtaining informed consent
from each study subject, complying with the protocol and investigational plan, adequately monitoring the clinical trial, and timely reporting adverse events.
Foreign studies conducted under an IND must meet the same requirements applicable to studies conducted in the United States. However, if a foreign study
is not conducted under an IND, the data may still be submitted to the FDA in support of a product application, if the study was conducted in accordance
with GCP and the FDA is able to validate the data.

The  sponsor  of  a  clinical  trial  or  the  sponsor’s  designated  responsible  party  may  be  required  to  register  certain  information  about  the  trial  and  disclose
certain results on government or independent registry websites, such as clinicaltrials.gov.

Clinical testing is typically performed in three phases, which may overlap or be subdivided in some cases.

In  Phase  1  trials,  the  product  candidate  is  administered  to  a  small  number  of  human  subjects  to  assess  its  safety  and  to  develop  detailed  profiles  of  its
pharmacological  and  pharmacokinetic  actions  (i.e.,  absorption,  distribution,  metabolism  and  excretion),  assess  the  early  safety  profile,  determine  side
effects associated with increasing doses, and, if possible, gain early evidence of effectiveness. Although Phase 1 trials are typically conducted in healthy
human subjects, in some instances (including, for example, with some cancer therapies) the trial subjects are patients with the targeted disease or condition.

In  Phase  2  trials,  the  product  candidate  is  administered  to  a  relatively  small  sample  of  the  intended  patient  population  to  develop  initial  data  regarding
efficacy in the targeted disease, determine the optimal dose range, and generate additional information regarding the product candidate’s safety. Additional
animal toxicology studies may precede this phase.

In Phase 3 trials, the product candidate is administered to a larger group of patients with the target disease or disorder, which may include patients with
concomitant diseases and medications. Typically, Phase 3 trials are conducted at multiple study sites and may be conducted concurrently for the sake of
time  and  efficiency.  The  purpose  of  Phase  3  clinical  trials  is  to  obtain  additional  information  about  safety  and  effectiveness  necessary  to  evaluate  the
product  candidate’s  overall  risk-benefit  profile  and  to  provide  a  basis  for  product  labeling.  Phase  3  data  often  form  the  core  basis  on  which  the  FDA
evaluates a product candidate’s safety and effectiveness when considering the product application.

The  study  sponsor,  the  FDA  or  an  IRB  may  suspend  or  terminate  a  clinical  trial  at  any  time  on  various  grounds,  including  a  determination  that  study
subjects are being exposed to an unacceptable health risk. Success in early-stage clinical trials does not

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assure success in later-stage clinical trials. Moreover, data from clinical trials are not always conclusive and may be subject to alternative interpretations
that could delay, limit or prevent approval.

NDA Submission and Review. After completing the clinical studies, a sponsor seeking approval to market a product candidate in the United States submits
to  the  FDA  a  New  Drug  Application  (“NDA”).  The  NDA  is  a  comprehensive  application  intended  to  demonstrate  the  product  candidate’s  safety  and
effectiveness and includes, among other things, pre-clinical and clinical data, information about the product candidate’s composition, the sponsor’s plans
for manufacturing and packaging and proposed labeling. When an NDA is submitted, the FDA makes an initial determination as to whether the application
is  sufficiently  complete  to  be  accepted  for  review.  If  the  application  is  not,  the  FDA  may  refuse  to  accept  the  NDA  for  filing  and  request  additional
information. A refusal to file, which requires resubmission of the NDA with the requested additional information, delays review of the application.

FDA performance goals generally provide for action on an NDA within 10 months of the 60-day filing date, or within 12 months of the NDA submission.
That deadline can be extended under certain circumstances, including by the FDA’s requests for additional information. The targeted action date can also be
shortened  to  6  months  of  the  60-day  filing  date,  or  8  months  after  NDA  submission  for  product  candidates  that  are  granted  priority  review  designation
because they are intended to treat serious or life-threatening conditions and demonstrate the potential to address unmet medical needs. The FDA has other
programs  to  expedite  development  and  review  of  product  candidates  that  address  serious  or  life-threatening  conditions.  For  example,  the  Fast  Track
program is intended to facilitate the development and review of new drugs that demonstrate the potential to address unmet medical needs involving serious
or life-threatening diseases or conditions. If a product candidate receives Fast Track designation, the FDA may review sections of the NDA on a rolling
basis, rather than requiring the entire application to be submitted to begin the review. Product candidates with Fast Track designation also may be eligible
for  more  frequent  meetings  and  correspondence  with  the  FDA  about  the  product  candidate’s  development.  Another  FDA  program  intended  to  expedite
development is the Accelerated Approval pathway, which allows approval on the basis of a surrogate endpoint that is reasonably likely to predict clinical
benefit or on an intermediate clinical endpoint. To qualify for review under the Accelerated Approval pathway, a product candidate must treat a serious
condition, provide a meaningful advantage over available therapies, and demonstrate an effect on a surrogate endpoint that is reasonably likely to predict
clinical benefit or on an intermediate clinical endpoint. Breakthrough Therapy designation, which is available for product candidates under development for
serious or life-threatening conditions and where preliminary clinical evidence shows that the product candidate may have substantial improvement on at
least  one  clinically  significant  endpoint  over  available  therapies,  means  that  a  product  candidate  will  be  eligible  for  all  of  the  benefits  of  Fast  Track
designation, as well as more intensive guidance from the FDA on an efficient drug development program and a commitment from the agency to involve
senior FDA managers in such guidance. Even if a product candidate qualifies for Fast Track designation or Breakthrough Therapy designation, the FDA
may later decide that the product no longer meets the conditions for designation and may rescind the designation, and/or may determine that the product
does not meet the standards for approval. As applicable, we anticipate seeking to utilize these programs to expedite the development and review of our
product candidates, but we cannot ensure that our product candidates will qualify for such programs, or that we will be able to maintain such designations if
we qualify for such programs.

The FDA reviews applications to determine, among other things, whether a product is safe and effective for its intended use and whether the manufacturing
controls  are  adequate  to  assure  and  preserve  the  product’s  identity,  strength,  quality,  and  purity.  For  some  NDAs,  the  FDA  may  convene  an  advisory
committee to seek insights and recommendations on issues relevant to approval of the application. Although the FDA is not bound by the recommendation
of an advisory committee, the agency considers such recommendations carefully when making decisions. Before approving a new drug product, the FDA
also  requires  that  the  facilities  at  which  the  product  will  be  manufactured  or  advanced  through  the  supply  chain  be  in  compliance  with  current  good
manufacturing practices (“GMP”) requirements and regulations governing, among other things, the manufacture, shipment, and storage of the product. The
FDA  also  can  conduct  audits  to  determine  if  the  clinical  trials  were  conducted  in  compliance  with  GCP.  After  review  of  an  NDA,  the  FDA  may  grant
marketing approval, request additional information, or issue a complete response letter (“CRL”) communicating the reasons for the agency’s decision not to
approve  the  application.  The  CRL  may  request  additional  information,  including  additional  preclinical  or  clinical  data,  for  the  FDA  to  reconsider  the
application. An NDA may be resubmitted with the deficiencies addressed, but resubmission does not guarantee approval. Data from clinical trials are not
always conclusive, and the FDA’s interpretation of data may differ from the sponsor’s. Obtaining approval can take years, requires substantial resources
and depends on a number of factors, including the severity of the targeted disease or condition, the availability of alternative treatments, and the risks and
benefits demonstrated in clinical trials. Additionally, as a condition of approval, the FDA may impose restrictions that could affect the commercial

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prospects of a product and increase our costs, such as a Risk Evaluation and Mitigation Strategy (“REMS”), and/or post-approval commitments to conduct
additional clinical trials or non-clinical studies or to conduct surveillance programs to monitor the product’s effects. Under the Pediatric Research Equity
Act (“PREA”), certain applications for approval must also include an assessment, generally based on clinical study data, of the safety and effectiveness of
the subject product in relevant pediatric populations, unless a waiver or deferral is granted.

Moreover,  once  a  product  is  approved,  information  about  its  safety  or  effectiveness  from  broader  clinical  use  may  limit  or  prevent  successful
commercialization  because  of  regulatory  action,  market  forces  or  for  other  reasons.  Post-approval  modifications  to  a  drug  product,  such  as  changes  in
indications,  labeling  or  manufacturing  processes  or  facilities,  may  require  development  and  submission  of  additional  information  or  data  in  a  new  or
supplemental NDA, which would also require prior FDA approval.

Competition. The Drug Price Competition and Patent Term Restoration Act of 1984 (the “Hatch-Waxman Act”) establishes two abbreviated approval
pathways for product candidates that are in some way follow-on versions of already approved branded NDA products: (i) generic versions of the approved
reference listed drug (“RLD”), which may be approved under an abbreviated new drug application (“ANDA”) by showing that the generic product is the
“same as” the approved product in key respects; and (ii) a product that is similar but not identical to a listed drug, which may be approved under a 505(b)
(2) NDA, in which the sponsor relies to some degree on information from investigations that were not conducted by or for the applicant and for which the
applicant has not obtained a right of reference, and submits its own product-specific data to support the differences between the product and the listed drug.

The sponsor of an ANDA or 505(b)(2) application seeking to rely on an approved product as the RLD or listed drug must make one of several certifications
regarding  each  patent  for  the  RLD  that  is  listed  in  the  FDA  publication,  Approved  Drug  Products  with  Therapeutic  Equivalence  Evaluations,  which  is
referred  to  as  the  Orange  Book.  A  “Paragraph  I”  certification  is  the  sponsor’s  statement  that  patent  information  has  not  been  filed  for  the  RLD.  A
“Paragraph II” certification is the sponsor’s statement that the RLD’s patents have expired. A “Paragraph III” certification is the sponsor’s statement that it
will wait for the patent to expire before obtaining approval for its product. A “Paragraph IV” certification is an assertion that the patent does not block
approval of the later product, either because the patent is invalid or unenforceable or because the patent, even if valid, is not infringed by the new product.
Once the FDA accepts for filing an ANDA or 505(b)(2) application containing a Paragraph IV certification, the applicant must within 20 days provide
notice  to  the  RLD  or  listed  drug  NDA  holder  and  patent  owner  that  the  application  has  been  submitted,  and  provide  the  factual  and  legal  basis  for  the
applicant’s assertion that the patent is invalid or not infringed. If the NDA holder or patent owner files suit against the ANDA or 505(b)(2) applicant for
patent infringement within 45 days of receiving the Paragraph IV notice, the FDA is prohibited from approving the ANDA or 505(b)(2) application for a
period of 30 months or the resolution of the underlying suit, whichever is earlier.

Exclusivity  and  Patent  Protection.  In  the  United  States  and  elsewhere,  certain  regulatory  exclusivities  and  patent  rights  can  provide  an  approved  drug
product with protection from certain competitors’ products for a period of time and within a certain scope. In the United States, those protections include
regulatory exclusivity under the Hatch-Waxman Act, which provides periods of exclusivity for a branded drug product that would serve as an RLD for a
generic drug applicant filing and an ANDA under section 505(j) of the FD&C Act or as a listed drug for an applicant filing an NDA under section 505(b)
(2) of the FD&C Act. If such a product is a “new chemical entity” (“NCE”) generally meaning that the active moiety has never before been approved in
any drug, there is a period of five years from the product’s approval during which the FDA may not accept for filing any ANDA or 505(b)(2) application
for a drug with the same active moiety. An ANDA or 505(b)(2) application may be submitted after four years, however, if the sponsor of the application
makes a Paragraph IV certification (as described above). Such a product that is not an NCE may qualify for a three-year period of exclusivity if its NDA
contains new clinical data (other than bioavailability studies), derived from studies conducted by or for the sponsor, that were necessary for approval. In
this instance, the three-year exclusivity period does not preclude filing or review of an ANDA or 505(b)(2) application; rather, the FDA is precluded from
granting final approval to the ANDA or 505(b)(2) application until three years after approval of the RLD. This three-year exclusivity applies only to the
conditions of approval that required submission of the clinical data.

The Hatch-Waxman Act also provides for the restoration of a portion of the patent term lost during product development and FDA review of an NDA if
approval  of  the  application  is  the  first  permitted  commercial  marketing  of  a  drug  containing  the  active  ingredient.  The  patent  term  restoration  period  is
generally one-half the time between the effective date of the IND or the

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date of patent grant (whichever is later) and the date of submission of the NDA, plus the time between the date of submission of the NDA and the date of
FDA approval of the product. The maximum period of restoration is five years, and the patent cannot be extended to more than 14 years from the date of
FDA approval of the product. Only one patent claiming each approved product is eligible for restoration and the patent holder must apply for restoration
within 60 days of approval. The U.S. Patent and Trademark Office (“USPTO”), in consultation with the FDA, reviews and approves the application for
patent term restoration.

Post-Approval Regulation

Once  approved,  drug  products  are  subject  to  continuing  extensive  regulation  by  the  FDA.  If  ongoing  regulatory  requirements  are  not  met,  or  if  safety
problems occur after a product reaches market, the FDA may take actions to change the conditions under which the product is marketed, such as requiring
labeling  modifications,  restricting  distribution,  or  even  withdrawing  approval.  In  addition  to  FDA  regulation,  our  business  is  also  subject  to  extensive
federal, state, local and foreign regulation.

Good Manufacturing Practices. Companies engaged in manufacturing drug products or their components must comply with applicable GMP requirements,
which include requirements regarding organization and training of personnel, building and facilities, equipment, control of components and drug product
containers,  closures,  production  and  process  controls,  packaging  and  labeling  controls,  holding  and  distribution,  laboratory  controls  and  records  and
reports. The FDA inspects equipment, facilities and manufacturing processes before approval and conducts periodic re-inspections after approval. If, after
receiving approval, a company makes a material change in manufacturing equipment, location, or process (all of which are, to some degree, incorporated in
the  NDA),  additional  regulatory  review  and  approval  may  be  required.  Failure  to  comply  with  applicable  GMP  requirements  or  the  conditions  of  the
product’s approval may lead the FDA to take enforcement actions, such as issuing a warning letter, or to seek sanctions, including fines, civil penalties,
injunctions, suspension of manufacturing operations, imposition of operating restrictions, withdrawal of FDA approval, seizure or recall of products, and
criminal prosecution. Although we periodically monitor FDA compliance of the third parties on which we rely for manufacturing our product candidates,
we  cannot  be  certain  that  our  present  or  future  third-party  manufacturers  will  consistently  comply  with  cGMP  or  other  applicable  FDA  regulatory
requirements.

Sales and Marketing. Once a product is approved, the advertising, promotion and marketing of the product will be subject to close regulation, including
with  regard  to  promotion  to  healthcare  practitioners,  direct-to-consumer  advertising,  communications  regarding  unapproved  uses,  industry-sponsored
scientific  and  educational  activities  and  promotional  activities  involving  the  internet.  In  addition  to  FDA  restrictions  on  marketing  of  pharmaceutical
products, state and federal fraud and abuse laws have been applied to restrict certain marketing practices in the pharmaceutical industry. Failure to comply
with applicable requirements in this area may subject a company to adverse publicity, investigations and enforcement action by the FDA, the Department of
Justice, the Office of the Inspector General of the Department of Health and Human Services, and/or state authorities. This could subject a company to a
range of penalties that could have a significant commercial impact, including civil and criminal fines and agreements that materially restrict the manner in
which a company promotes or distributes drug products.

Other  Requirements.  Companies  that  manufacture  or  distribute  drug  products  pursuant  to  approved  NDAs  must  meet  numerous  other  regulatory
requirements, including adverse event reporting, submission of periodic reports, and record-keeping obligations.

Fraud and Abuse Laws. At such time as we market, sell and distribute any products for which we obtain marketing approval, it is possible that our business
activities could be subject to scrutiny and enforcement under one or more federal or state health care fraud and abuse laws and regulations, which could
affect our ability to operate our business. These restrictions under applicable federal and state health care fraud and abuse laws and regulations that may
affect our ability to operate include:

•

The  federal  Anti-Kickback  Law,  which  prohibits,  among  other  things,  knowingly  or  willingly  offering,  paying,  soliciting  or  receiving
remuneration, directly or indirectly, in cash or in kind, to induce or reward the purchasing, leasing, ordering or arranging for or recommending the
purchase, lease or order of any health care items or service for which payment may be made, in whole or in part, by federal healthcare programs
such as Medicare and Medicaid. This statute has been interpreted to apply to arrangements between pharmaceutical companies on one hand and
prescribers, purchasers and formulary managers on the other. Liability may be established under the federal Anti-Kickback Law without proving
actual knowledge of the statute or specific intent to violate it. In addition, the government may assert

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that a claim including items or services resulting from a violation of the federal Anti-Kickback Law constitutes a false or fraudulent claim for
purposes of the federal civil False Claims Act. Although there are a number of statutory exemptions and regulatory safe harbors to the federal
Anti-Kickback Law protecting certain common business arrangements and activities from prosecution or regulatory sanctions, the exemptions and
safe harbors are drawn narrowly, and practices that do not fit squarely within an exemption or safe harbor, or for which no exception or safe harbor
is available, may be subject to scrutiny.

•

The  federal  civil  False  Claims  Act,  which  prohibits,  among  other  things,  individuals  or  entities  from  knowingly  presenting,  or  causing  to  be
presented, a false or fraudulent claim for payment of government funds or knowingly making, using or causing to be made or used, a false record
or  statement  material  to  an  obligation  to  pay  money  to  the  government  or  knowingly  concealing  or  knowingly  and  improperly  avoiding,
decreasing or concealing an obligation to pay money to the federal government. Actions under the False Claims Act may be brought by the United
States Attorney General or as a qui tam action by a private individual (a whistleblower) in the name of the government and the individual, and the
whistleblower  may  share  in  any  monetary  recovery.  Many  pharmaceutical  and  other  healthcare  companies  have  been  investigated  and  have
reached substantial financial settlements with the federal government under the civil False Claims Act for a variety of alleged improper marketing
activities,  including:  providing  free  product  to  customers  with  the  expectation  that  the  customers  would  bill  federal  programs  for  the  product;
providing  sham  consulting  fees,  grants,  free  travel  and  other  benefits  to  physicians  to  induce  them  to  prescribe  the  company’s  products;  and
inflating prices reported to private price publication services, which are used to set drug payment rates under government healthcare programs. In
addition, in recent years the government has pursued civil False Claims Act cases against a number of pharmaceutical companies for causing false
claims to be submitted as a result of the marketing of their products for unapproved, and thus non-reimbursable, uses. Because of the threat of
treble  damages  and  mandatory  penalties  per  false  or  fraudulent  claim  or  statement,  healthcare  and  pharmaceutical  companies  often  resolve
allegations without admissions of liability for significant and material amounts. Pharmaceutical and other healthcare companies also are subject to
other  federal  false  claim  laws,  including,  among  others,  federal  criminal  healthcare  fraud  and  false  statement  statutes  that  extend  to  non-
government health benefit programs.

• Analogous  state  and  local  laws  and  regulations,  such  as  state  anti-kickback  and  false  claims  laws,  which  may  apply  to  sales  or  marketing
arrangements and claims involving healthcare items or services reimbursed by non-governmental third-party payors, including private insurers;
state and foreign laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and
the  relevant  compliance  guidance  promulgated  by  the  federal  government  or  otherwise  restrict  payments  that  may  be  made  to  healthcare
providers;  state  laws  that  restrict  the  ability  of  manufacturers  to  offer  co-pay  support  to  patients  for  certain  prescription  drugs;  and  state  and
foreign laws that require drug manufacturers to report information related to clinical trials, or information related to payments and other transfers
of  value  to  physicians  and  other  healthcare  providers  or  marketing  expenditures;  state  laws  and  local  ordinances  that  require  identification  or
licensing of sales representatives.

•

•

The federal Physician Payment Sunshine Act, being implemented as the Open Payments Program, which requires manufacturers of drugs, devices,
biologics,  and  medical  supplies  for  which  payment  is  available  under  Medicare,  Medicaid  or  the  Children’s  Health  Insurance  Program  (with
certain  exceptions)  to  report  annually  to  the  Centers  for  Medicare  and  Medicaid  Services  (“CMS”)  information  related  to  direct  or  indirect
payments and other transfers of value to physicians and teaching hospitals, as well as ownership and investment interests held in the company by
physicians  and  their  immediate  family  members.  Beginning  in  2022,  applicable  manufacturers  also  will  be  required  to  report  information
regarding  payments  and  transfers  of  value  provided  (starting  in  2021)  to  physician  assistants,  nurse  practitioners,  clinical  nurse  specialists,
certified nurse anesthetists, and certified nurse-midwives.

The federal Foreign Corrupt Practices Act of 1997 and other similar anti-bribery laws in other jurisdictions generally prohibit companies and their
intermediaries  from  providing  money  or  anything  of  value  to  officials  of  foreign  governments,  foreign  political  parties  or  international
organizations  with  the  intent  to  obtain  or  retain  business  or  seek  a  business  advantage.  Recently,  there  has  been  a  substantial  increase  in  anti-
bribery law enforcement activity by United States regulators, with more frequent and aggressive investigations and enforcement proceedings by
both the Department of Justice and the United States Securities and Exchange Commission (the “SEC”). Violations of United States or foreign
laws  or  regulations  could  result  in  the  imposition  of  substantial  fines,  interruptions  of  business,  loss  of  supplier,  vendor  or  other  third-party
relationships, termination of necessary licenses and permits and other legal or

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equitable sanctions. Other internal or government investigations or legal or regulatory proceedings, including lawsuits brought by private litigants,
may also follow as a consequence.

Violations  of  any  of  the  laws  described  above  or  any  other  governmental  regulations  are  punishable  by  significant  civil,  criminal  and  administrative
penalties, damages, fines and exclusion from government-funded healthcare programs, such as Medicare and Medicaid. Although  compliance  programs
can  mitigate  the  risk  of  investigation  and  prosecution  for  violations  of  these  laws,  the  risks  cannot  be  entirely  eliminated.  Moreover,  achieving  and
sustaining compliance with applicable federal and state privacy, security and fraud laws may prove costly.

Privacy Laws. We are also subject to federal, state and foreign laws and regulations governing data privacy and security of health information, and the
collection, use and disclosure, and protection of health-related and other personal information. The legislative and regulatory landscape for privacy and data
protection continues to evolve, and there has been an increasing focus on privacy and data protection issues that may affect our business, including recently
enacted  laws  in  all  jurisdictions  where  we  operate.    Numerous  federal  and  state  laws,  including  state  security  breach  notification  laws,  state  health
information privacy laws, state genetic privacy laws, and federal and state consumer protection and privacy laws, (including, for example, Section 5 of the
FTC Act, and the California Consumer Privacy Act (“CCPA”)) govern the collection, use and disclosure of personal information. These laws may differ
from each other in significant ways, thus complicating compliance efforts. Federal regulators, state attorneys general, and plaintiffs’ attorneys have been
and will likely continue to be active in this space.

Failure to comply with such laws and regulations could result in government enforcement actions and create liability for us (including the imposition of
significant penalties), private litigation and/or adverse publicity that could negatively affect our business. In addition, if we successfully commercialize our
product candidates, we may obtain patient health information from healthcare providers who prescribe our products and research institutions we collaborate
with,  and  they  are  subject  to  privacy  and  security  requirements  under  the  Health  Insurance  Portability  and  Accountability  Act  of  1996  (“HIPAA”). 
Although we are not directly subject to HIPAA other than potentially with respect to providing certain employee benefits, we could potentially be subject to
criminal  penalties  if  we,  or  our  affiliates  or  our  agents  knowingly  obtain,  use  or  disclose  individually  identifiable  health  information  maintained  by  a
HIPAA-covered entity in a manner that is not authorized or permitted by HIPAA.

In California, the CCPA took effect on January 1, 2020. The CCPA establishes certain requirements for data use and sharing transparency and provides
California residents certain rights concerning the use, disclosure, and retention of their personal data. The CCPA and its implementing regulations have
already been amended multiple times since their enactment. Similarly, there are a number of legislative proposals in the United States, at both the federal
and state level, that could impose new obligations or limitations in areas affecting our business. These laws and regulations are evolving and subject to
interpretation, and may impose limitations on our activities or otherwise adversely affect our business. Similarly, there are a number of legislative proposals
in the European Union, the United States, at both the federal and state level, as well as other jurisdictions that could impose new obligations or limitations
in  areas  affecting  our  business.  In  addition,  some  countries  are  considering  or  have  passed  legislation  implementing  data  protection  requirements  or
requiring local storage and processing of data or similar requirements that could increase the cost and complexity of delivering our services and research
activities.  These  laws  and  regulations,  as  well  as  any  associated  claims,  inquiries,  or  investigations  or  any  other  government  actions  may  lead  to
unfavorable  outcomes  including  increased  compliance  costs,  delays  or  impediments  in  the  development  of  new  products,  negative  publicity,  increased
operating costs, diversion of management time and attention, and remedies that harm our business, including fines or demands or orders that we modify or
cease existing business practices.

Coverage and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any product candidates for which we may obtain regulatory approval. The
regulations that govern marketing approvals, pricing and reimbursement for new drug products vary widely from country to country. Current  and  future
legislation may significantly change the approval requirements in ways that could involve additional costs and cause delays in obtaining approvals. 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 or
product licensing approval is granted. In  some  foreign  markets,  prescription  pharmaceutical  pricing  remains  subject  to  continuing  governmental  control
even after initial approval is granted. As a result, we might obtain marketing approval for a product in a particular country, but then be subject to price
regulations that delay our commercial launch of the product, possibly for lengthy time periods, which could negatively impact the revenues we are able to
generate from the sale of the product in that particular

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country. Adverse  pricing  limitations  may  hinder  our  ability  to  recoup  our  investment  in  one  or  more  product  candidates  even  if  our  product  candidates
obtain marketing approval.

Our  ability  to  commercialize  any  products  successfully  also  will  depend  in  part  on  the  extent  to  which  coverage  and  adequate  reimbursement  for  these
products and related treatments will be available in a timely manner from government third-party payors, including government healthcare programs such
as  Medicare  and  Medicaid,  commercial  health  insurers  and  managed  care  organizations.  Government  authorities  and  other  third-party  payors,  such  as
private health insurers and health maintenance organizations, determine which medications they will cover and establish reimbursement levels. Third-party
payors may limit coverage to specific products on an approved list, or formulary, which may not include all of the FDA-approved products for a particular
indication. The  process  for  determining  whether  a  payor  will  provide  coverage  for  a  product  may  be  separate  from  the  process  for  setting  the  price  or
reimbursement rate that the payor will pay for the product once coverage is approved.

A primary trend in the United States healthcare industry and elsewhere is cost containment. Government healthcare programs and other third-party payors
are increasingly challenging the prices charged for medical products and services and examining the medical necessity and cost-effectiveness of medical
products and services, in addition to their safety and efficacy, and have attempted to control costs by limiting coverage and the amount of reimbursement
for particular medications. Increasingly, third-party payors are requiring that drug companies provide them with predetermined discounts from list prices
and are challenging the prices charged for medical products. We cannot be sure that coverage and reimbursement will be available promptly or at all for
any  product  that  we  commercialize  and,  if  reimbursement  is  available,  what  the  level  of  reimbursement  will  be.  Moreover,  eligibility  for  coverage  and
reimbursement  does  not  imply  that  any  drug  will  be  paid  for  in  all  cases.  Limited  coverage  may  impact  the  demand  for,  or  the  price  of,  any  product
candidate for which we obtain marketing approval. If coverage and reimbursement are not available or reimbursement is available only to limited levels,
we may not successfully commercialize any product candidate for which we obtain marketing approval.

Obtaining  coverage  and  adequate  reimbursement  is  a  time-consuming  and  costly  process.  There  may  be  significant  delays  in  obtaining  coverage  and
reimbursement for newly approved drugs, and coverage may be more limited than the purposes for which the drug is approved by the FDA or comparable
foreign regulatory authorities. Moreover, eligibility for coverage and reimbursement does not imply that a 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 only be temporary. 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. Limited coverage
may impact the demand for, or the price of, any product candidate for which we obtain marketing approval. Third-party payors also may seek additional
clinical evidence, including expensive pharmacoeconomic studies, beyond the data required to obtain marketing approval, demonstrating clinical benefits
and value in specific patient populations, before covering our products for those patients. If reimbursement is available only for limited indications, we may
not be able to successfully commercialize any product candidate for which we obtain marketing approval. Our inability to promptly obtain coverage and
profitable reimbursement rates from both government-funded and private payors for any approved products that we develop could have a material adverse
effect on our operating results, our ability to raise capital needed to commercialize products and our overall financial condition.

If we successfully commercialize any of our products, we may participate in the Medicaid Drug Rebate Program. Participation is required for federal funds
to be available for our products under Medicaid and Medicare Part B. Under the Medicaid Drug Rebate Program, we would be required to pay a rebate to
each state Medicaid program for our covered outpatient drugs that are dispensed to Medicaid beneficiaries and paid for by a state Medicaid program as a
condition of having federal funds being made available to the states for our drugs under Medicaid and Part B of the Medicare program.

Federal law requires that any company that participates in the Medicaid Drug Rebate Program also participate in the Public Health Service’s 340B drug
pricing program in order for federal funds to be available for the manufacturer’s drugs under Medicaid and Medicare Part B. The 340B program requires
participating manufacturers to agree to charge statutorily-defined covered entities no more than the 340B “ceiling price” for the manufacturer’s covered
outpatient drugs. These 340B covered

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entities  include  a  variety  of  community  health  clinics  and  other  entities  that  receive  health  services  grants  from  the  Public  Health  Service,  as  well  as
hospitals that serve a disproportionate share of low-income patients.

In addition, in order to be eligible to have its products paid for with federal funds under the Medicaid and Medicare Part B programs and purchased by the
Department of Veterans Affairs (the “VA”), Department of Defense (“DoD”), Public Health Service, and Coast Guard (the “Big Four agencies”) and certain
federal  grantees,  a  manufacturer  also  must  participate  in  the  VA  Federal  Supply  Schedule  (“FSS”)  pricing  program,  established  by  Section  603  of  the
Veterans Health Care Act of 1992 (the “VHCA”). Under this program, the manufacturer is obligated to make its covered drugs (innovator multiple source
drugs, single source drugs, and biologics) available for procurement on an FSS contract and charge a price to the Big Four agencies that is no higher than
the Federal Ceiling Price (“FCP”), which is a price calculated pursuant to a statutory formula. The FCP is derived from a calculated price point called the
“non-federal average manufacturer price” (“Non-FAMP”), which we will be required to calculate and report to the VA on a quarterly and annual basis.
Moreover, pursuant to Defense Health Agency (“DHA”) regulations, manufacturers must provide rebates on utilization of their innovator and single source
products that are dispensed to TRICARE beneficiaries by TRICARE network retail pharmacies. The formula for determining the rebate is established in the
regulations and is based on the difference between the annual non-federal average manufacturer price and the Federal Ceiling Price, each required to be
calculated  by  us  under  the  VHCA.  The  requirements  under  the  Medicaid  Drug  Rebate  Program,  340B  program,  FSS,  and  TRICARE  programs  could
reduce the revenue we may generate from any products that are commercialized in the future and could adversely affect our business and operating results.

United States Healthcare Reform

The United States and many foreign jurisdictions have enacted or proposed legislative and regulatory changes affecting the healthcare system that could
prevent  or  delay  marketing  approval  of  our  product  candidates,  restrict  or  regulate  post-approval  activities  and  affect  our  ability  to  profitably  sell  any
product  candidate  for  which  we  obtain  marketing  approval.  The  United  States  government,  state  legislatures  and  foreign  governments  also  have  shown
significant  interest  in  implementing  cost-containment  programs  to  limit  the  growth  of  government-paid  healthcare  costs,  including  price  controls,
restrictions on reimbursement and requirements for substitution of generic products for branded prescription drugs.

In recent years, Congress has considered reductions in Medicare reimbursement levels for drugs administered by physicians. The Centers for Medicare &
Medicaid Services (CMS), the agency that administers the Medicare and Medicaid programs, has authority to revise reimbursement rates and to implement
coverage restrictions. Cost reduction initiatives and changes in coverage implemented through legislation or regulation could decrease utilization of and
reimbursement for any approved products, which in turn would affect the price we can receive for those products. Any reduction in reimbursement from
Medicare and other government programs may result in a similar reduction in payment from commercial payers. The implementation of cost containment
measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability, or commercialize our products.

The  Affordable  Care  Act,  as  amended  by  the  Health  Care  and  Education  Reconciliation  Act  of  2010  (collectively,  the  “Affordable  Care  Act”),  has
substantially changed the way healthcare is financed by both governmental and private insurers, and has significantly impacted the pharmaceutical industry.
The Affordable Care Act was intended to broaden access to health insurance, reduce or constrain the growth of healthcare spending, enhance remedies
against  healthcare  fraud  and  abuse,  add  new  transparency  requirements  for  healthcare  and  health  insurance  industries,  impose  new  taxes  and  fees  on
pharmaceutical and medical device manufacturers, and impose additional health policy reforms.

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 and implementation. For example, the Tax Cuts and Jobs Act, enacted on December 22, 2017, eliminated the tax-based 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. Currently, the Supreme Court is considering whether the Affordable Care Act’s individual mandate,
post-repeal of its associated tax penalty, is unconstitutional, and, if so, whether the remaining provisions of the Affordable Care Act are inseverable from
the  mandate.  A  ruling  is  expected  by  mid-2021  and  could  produce  any  of  a  number  of  results,  including  invalidation  of  the  Affordable  Care  Act  in  its
entirety if there is a finding of inseverability. It is unclear how the ultimate decision in this case, or other efforts to repeal, replace or otherwise modify, or
invalidate, the Affordable Care Act or its implementing regulations, or portions thereof, will impact our business. Additional legislative changes, regulatory
changes, and

26

judicial challenges related to the Affordable Care Act remain possible. Any such changes could decrease the number of individuals with health coverage. It
is possible that the Affordable Care Act, as currently enacted or as it may be amended in the future, and other healthcare reform measures that may be
adopted  in  the  future  could  have  a  material  adverse  effect  on  our  industry  generally  and  on  our  ability  to  successfully  commercialize  our  product
candidates, if approved.

In addition, other legislative changes have been proposed since the Affordable Care Act was enacted. For example, the Budget Control Act of 2011, among
other  things,  created  the  Joint  Select  Committee  on  Deficit  Reduction  to  recommend  to  Congress  proposals  for  spending  reductions.  The  Joint  Select
Committee did not achieve a targeted deficit reduction, which triggered the legislation’s automatic reductions. In concert with subsequent legislation, this
has resulted in aggregate reductions to Medicare payments to providers of, on average, 2% per fiscal year through 2030 (with the exception of a temporary
suspension from May 1, 2020 through March 31, 2021) unless Congress takes additional action. As long as these cuts remain in effect, they could adversely
impact payment for any of our products that are reimbursed under Medicare, once commercialized.

We expect that the Affordable Care Act, as well as other healthcare reform measures that have been adopted and may be adopted in the future, may result in
more rigorous coverage criteria and new payment methodologies, and in additional downward pressure on coverage and payment and the price that we
receive  for  any  approved  product,  and  could  seriously  harm  our  future  revenues.  Any  reduction  in  reimbursement  from  Medicare,  Medicaid  or  other
government  programs  may  result  in  a  similar  reduction  in  payments  from  private  payors.  The  implementation  of  cost  containment  measures  or  other
healthcare reforms may prevent us from being able to generate revenue, attain profitability or commercialize our products.

Foreign Regulation

In addition to regulations in the United States, we will be subject to a number of significant regulations in other jurisdictions regarding research, clinical
trials,  approval,  manufacturing,  distribution,  marketing  and  promotion  and  safety  reporting.  These  requirements  and  restrictions  vary  from  country  to
country,  but  in  many  instances  are  similar  to  the  United  States  requirements,  and  failure  to  comply  with  them  could  have  the  same  negative  effects  as
noncompliance in the United States.

Corporate Information

Tekmira Pharmaceuticals Corporation (“Tekmira”) was incorporated pursuant to the British Columbia Business Corporations Act (“BCBCA”) on October
6,  2005,  and  commenced  active  business  on  April  30,  2007,  when  Tekmira  and  its  parent  company,  Inex  Pharmaceuticals  Corporation  (“Inex”),  were
reorganized under a statutory plan of arrangement (the “Plan of Arrangement”) completed under the provisions of the BCBCA. Pursuant to the Plan of
Arrangement, all of Inex’s business was transferred to Tekmira.

On March 4, 2015, we completed a business combination pursuant to which OnCore Biopharma, Inc. (“OnCore”) became our wholly-owned subsidiary of
Tekmira.

On July 31, 2015, we changed our corporate name from Tekmira Pharmaceuticals Corporation to Arbutus Biopharma Corporation and OnCore changed its
corporate name to Arbutus Biopharma, Inc.

We had two wholly-owned subsidiaries as of December 31, 2020: Arbutus Biopharma, Inc. and Arbutus Biopharma US Holdings, Inc. In February 2021,
Arbutus Biopharma US Holdings, Inc. merged with Arbutus Biopharma, Inc. with Arbutus Biopharma, Inc. as the surviving entity.

Protiva  Biotherapeutics  Inc.  (“Protiva”)  was  acquired  on  May  30,  2008.  On  January  1,  2018,  Protiva  was  amalgamated  with  Arbutus  Biopharma
Corporation.

Our principal executive office is located at 701 Veterans Circle, Warminster, Pennsylvania, USA, 18974, and our telephone number is (267) 469-0914.

Unless stated otherwise or the context otherwise requires, references herein to “Arbutus”, “we”, “us” and “our” refer to Arbutus Biopharma Corporation,
and, unless the context requires otherwise, the subsidiaries through which we conduct business.

27

Investor Information

We are a reporting issuer in Canada under the securities laws of each of the Provinces of Canada. Our common shares trade on the Nasdaq Global Select
Market under the symbol “ABUS”. We maintain a website at http://www.arbutusbio.com. The information on our website is not incorporated by reference
into this Annual Report on Form 10-K and should not be considered to be a part of this Annual Report on Form 10-K. Our website address is included in
this Annual Report on Form 10-K as an inactive technical reference only. Copies of this Annual Report on Form 10-K, and our other annual reports on
Form  10-K,  proxy  statements,  quarterly  reports  on  Form  10-Q,  current  reports  on  Form  8-K  and,  if  applicable,  amendments  to  those  reports  filed  or
furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, are available free of charge through our website under
“Investors – Financial Information – SEC Filings” as soon as reasonably practicable after we electronically file these materials with, or otherwise furnish
them to, the SEC. The SEC maintains an Internet site that contains reports, proxy and information statements and other information regarding issuers that
file electronically with the SEC at www.sec.gov.

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Item 1A. Risk Factors

Our business is subject to substantial risks and uncertainties. The occurrence of any of the following risks and uncertainties, either alone or taken together,
could materially and adversely affect our business, financial condition, results of operations or prospects. In these circumstances, the market price of our
common shares could decline and you may lose all or part of your investment. The risks and uncertainties described below are not the only ones we face.
Risks and uncertainties of general applicability and additional risks and uncertainties not currently known to us or that we currently deem to be immaterial
may also materially and adversely affect our business, financial condition, results of operations or prospects.

Risks Related to Our Business, Our Financial Results and Need for Additional Capital

We  are  in  the  early  stages  of  our  development,  and  there  is  a  limited  amount  of  information  about  us  upon  which  you  can  evaluate  our  product
candidates.

We  have  not  begun  to  market  or  generate  revenues  from  the  commercialization  of  any  of  our  product  candidates.  We  have  only  a  limited  history  upon
which you can evaluate our business and prospects as our product candidates are still at an early stage of development and thus we have limited experience
and have not yet demonstrated an ability to successfully overcome many of the risks and uncertainties frequently encountered by companies in new and
rapidly evolving fields, particularly in the biopharmaceutical area. For example, to execute our business plan, we will need to successfully:

execute research and development activities using technologies involved in the development of our product candidates;
build, maintain and protect a strong intellectual property portfolio;
gain regulatory approval and market acceptance for the commercialization of any product candidates we develop;
conduct sales and marketing activities if any of our product candidates are approved;
develop and maintain successful strategic relationships; and

•
•
•
•
•
• manage our spending and cash requirements as our expenses are expected to continue to increase due to research and pre-clinical work, clinical

trials, regulatory approvals, commercialization and maintaining our intellectual property portfolio.

If  we  are  unsuccessful  in  accomplishing  these  objectives,  we  may  not  be  able  to  develop  our  product  candidates,  raise  capital,  expand  our  business  or
continue  our  operations. The  approach  we  are  taking  to  discover  and  develop  novel  product  candidates  is  unproven  and  may  never  lead  to  marketable
products.

We are concentrating and intend to continue to concentrate our internal research and development efforts primarily on the discovery and development of
product  candidates  targeting  chronic  HBV  in  order  to  ultimately  develop  a  functional  curative  combination  regimen,  as  well  as  on  therapies  to  treat
coronaviruses, including COVID-19. Our future success depends in part on the successful development of these product candidates. Our approach to the
treatment of HBV is unproven, and we do not know whether we will be able to develop any products of commercial value.

There is no known functional cure for HBV. Any compounds that we develop may not effectively address HBV persistence. Even if we are able to develop
compounds  that  address  one  or  more  of  the  key  factors  in  the  HBV  life  cycle  (e.g.,  HBV  replication,  HBsAg  expression  and  immune  reactivation),
targeting these key factors has not been proven to functionally cure HBV. If we cannot develop compounds to achieve our goal of functionally curing HBV
internally, we may be unable to acquire additional product candidates on terms acceptable to us, or at all. Even if we are able to acquire or develop product
candidates that address one of these mechanisms of action in pre-clinical studies, we may not succeed in demonstrating safety and efficacy of the product
candidate in clinical trials. If we are unable to identify suitable compounds for pre-clinical and clinical development, we will not succeed in realizing our
goal of a functional curative combination regimen for HBV.

We  will  require  substantial  additional  capital  to  fund  our  operations.  Additional  funds  may  be  dilutive  to  shareholders  or  impose  operational
restrictions. Further, if additional capital is not available, we may need to delay, limit or eliminate our research, development and commercialization
programs and modify our business strategy.

Our principal sources of liquidity are cash, cash equivalents and marketable securities, which were $123.3 million as of December 31, 2020. From January
1, 2021 through March 4, 2021, we received an additional $24.3 million of net proceeds from the issuance of common shares under the ATM program. We
believe that our cash resources will be sufficient to fund our operations through the third quarter of 2022. However, changing circumstances may cause us
to consume capital faster than we

29

currently  anticipate,  and  we  may  need  to  spend  more  money  than  currently  expected  because  of  such  circumstances.  Within  the  next  several  years,
substantial additional funds will be required to continue with the active development of our pipeline product candidates and technologies. In particular, our
funding needs may vary depending on a number of factors including:

•
•
•
•

revenues earned from our licensing partners, including Alnylam and Gritstone;
the extent to which we continue the development of our product candidates or form licensing arrangements to advance our product candidates;
our decisions to in-license or acquire additional products, additional product candidates or technology for development;
our ability to attract and retain development or commercialization partners, and their effectiveness in carrying out the development and ultimate
commercialization of one or more of our product candidates;

• whether  batches  of  product  candidates  that  we  manufacture  fail  to  meet  specifications  resulting  in  clinical  trial  delays  and  investigational  and

remanufacturing costs;
the decisions, and the timing of decisions, made by health regulatory agencies regarding our technology and product candidates;
competing products, product candidates and technological and market developments; and
prosecuting and enforcing our patent claims and other intellectual property rights.

•
•
•

We  will  seek  to  obtain  funding  to  maintain  and  advance  our  business  from  a  variety  of  sources  including  equity  financings,  debt  financings,  licensing
agreements, partnerships, government grants and contracts and other strategic transactions and funding opportunities. There can be no assurance that we
will be able to complete any such transaction on acceptable terms or otherwise.

If we are able to raise additional capital through the issuance of equity securities, the percentage ownership of our current shareholders will be reduced. In
addition, we may issue equity as part of the consideration to our licensors, to compensate consultants or to settle outstanding payables, all of which could
cause our shareholders to experience additional dilution in net book value per share. Any such additional equity securities may have rights, preferences and
privileges senior to those of the holders of our common shares.

Debt financing, if available, will result in increased fixed payment obligations and 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. Any debt financing or additional
equity that we raise may contain terms, such as liquidation and other preferences, which are not favorable to us or our existing shareholders. If we raise
additional  funds  through  corporate  collaborations,  partnerships  or  other  strategic  transactions,  it  may  be  necessary  to  relinquish  valuable  rights  to  our
product candidates, our technologies or future revenue streams or to grant licenses or sell assets on terms that may not be favorable to us.

If we are unable to raise additional capital in sufficient amounts or on terms acceptable to us, we will need to curtail and reduce our operations and costs,
and modify our business strategy which may require us to, among other things:

•

•

•

•

significantly delay, scale back or discontinue the development or commercialization of one or more of our product candidates or one or more of
our research and development initiatives;
seek collaborators for one or more of our product candidates or one or more of our research and development initiatives at an earlier stage than
otherwise would be desirable or on terms that are less favorable than might otherwise be available;
sell or license on unfavorable terms our rights to one or more of our technologies, product candidates or research and development initiatives that
we otherwise would seek to develop or commercialize ourselves; or
cease operations.

We have incurred losses in nearly every year since our inception and we anticipate that we will not achieve profits for the foreseeable future. To date,
we have had no product revenues.

With the exception of the years ended December 31, 2006 and December 31, 2012, we have incurred losses each fiscal year since inception through the
year ended December 31, 2020 and have not received any revenues other than from research and development collaborations, royalties, license fees and
milestone  payments.  From  inception  to  December  31,  2020,  we  have  an  accumulated  net  deficit  of  approximately  $1.0  billion.  Investment  in  drug
development is highly speculative because it entails

30

substantial upfront capital expenditures and significant risk that a product candidate will fail to gain regulatory approval or become commercially viable.
We  continue  to  incur  significant  research,  development  and  other  expenses  related  to  our  ongoing  operations,  including  development  of  our  product
candidates.  We  do  not  expect  to  achieve  profits  until  such  time  as  product  sales,  milestone  payments  and  royalty  payments,  if  any,  generate  sufficient
revenues to fund our continuing operations. We cannot predict if we will ever achieve profitability and, if we do, we may not be able to remain consistently
profitable or increase our profitability.

We  expect  to  continue  to  incur  significant  expenses  and  operating  losses  for  the  foreseeable  future.  We  anticipate  that  our  expenses  will  continue  to  be
significant if and as we:

continue our research and pre-clinical and clinical development of our product candidates;
•
initiate additional pre-clinical, clinical or other studies or trials for our product candidates;
•
continue or expand our licensing arrangements with our licensing partners;
•
change or add additional manufacturers or suppliers;
•
seek regulatory approvals for our product candidates that successfully complete clinical trials;
•
establish a sales, marketing and distribution infrastructure to commercialize any product candidates for which we may obtain regulatory approval;
•
seek to identify and validate additional product candidates;
•
•
acquire or in-license other product candidates and technologies;
• maintain, protect and expand our intellectual property portfolio;
•
•
•

attract and retain skilled personnel;
create additional infrastructure to support our research, product development and planned future commercialization efforts; and
experience any delays or encounter issues with any of the above.

The  net  losses  we  incur  may  fluctuate  significantly  from  quarter  to  quarter  and  year  to  year,  such  that  a  period-to-period  comparison  of  our  results  of
operations may not be a good indication of our future performance.

The COVID-19 coronavirus could adversely impact our business, including our clinical development plans.

In  December  2019,  a  novel  strain  of  coronavirus,  SARS-CoV-2  (the  “COVID-19  coronavirus”),  was  reported  to  have  surfaced  in  Wuhan,  China.  Since
then, the COVID-19 coronavirus has spread to multiple countries, including the United States, and has caused significant disruptions around the world. We
may continue to experience disruptions as a result of the COVID-19 coronavirus pandemic that could severely impact our business, including:

•

•

•

•

•

•

•

interruption of key manufacturing, research and clinical development activities due to limitations on work and travel imposed or recommended by
federal or state governments, employers and others;
delays  or  difficulties  in  clinical  trial  site  operations,  including  difficulties  in  recruiting  clinical  site  investigators  and  clinical  site  staff  and
difficulties in enrolling subjects or treating subjects in active trials;
the  diversion  of  healthcare  resources  away  from  the  conduct  of  clinical  trial  matters  to  focus  on  COVID-19  coronavirus  pandemic  concerns,
including the administration of COVID-19 coronavirus vaccines, which could negatively affect the attention of physicians serving as our clinical
trial investigators, the hospitals serving as our clinical trial sites and the hospital staff supporting the conduct of our clinical trials;
limitations on travel and quarantine requirements that interrupt key clinical trial activities, such as clinical trial site initiations, our ability and the
ability  of  our  CROs  to  access  and  monitor  clinical  trial  sites,  and  new  clinical  trial  site  policies  resulting  from  the  COVID-19  coronavirus
pandemic that determine essential and non-essential functions and staff, which may impact the ability of site staff to conduct assessments or result
in delays to the conduct of the assessments as part of our clinical trial protocols, or impact the ability to enter assessment results into clinical trial
databases  in  a  timely  manner,  or  limit  the  ability  of  a  subject  to  participate  in  a  clinical  trial  or  delay  access  to  product  candidate  dosing  or
assessments;
interruption of key business activities due to illness and/or quarantine of key individuals and delays associated with recruiting, hiring and training
new temporary or permanent replacements for such key individuals, both internally and at our third party service providers;
delays in research and clinical trial sites receiving the supplies and materials needed to conduct preclinical studies and clinical trials, due to work
stoppages, travel and shipping interruptions or restrictions or other reasons;
potential clinical trial subjects may be unable or unwilling to participate further (or may have to limit participation) in our clinical trials due to
risks related to the COVID-19 coronavirus pandemic;

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•

•

•

difficulties  in  raising  additional  capital  needed  to  pursue  the  development  of  our  programs  due  to  the  slowing  of  our  economy  and  near  term
and/or long term negative effects of the pandemic on the financial, banking and capital markets;
changes  in  local  regulations  as  part  of  a  response  to  the  COVID-19  coronavirus  outbreak  that  may  require  us  to  change  the  ways  in  which
research, including clinical development, is conducted, which may result in unexpected costs; and
delays  in  necessary  interactions  with  regulators  and  other  important  agencies  and  contractors  due  to  limitations  in  employee  resources,  travel
restrictions or forced furlough of government employees.

If a subject participating in one of our clinical trials contracts COVID-19 coronavirus, this could negatively impact the data readouts from these trials; for
example, the subject may be unable to participate further (or may have to limit participation) in our clinical trial, the subject may show a different clinical
trial assessment than if the subject had not contracted the COVID-19 coronavirus, or the subject could experience an adverse event that could be attributed
to our product candidate.

The global outbreak of the COVID-19 coronavirus continues to rapidly evolve. The extent to which the COVID-19 coronavirus may further impact our
business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the duration of the pandemic,
travel restrictions and social distancing in the United States and other countries, business closures or business disruptions and the effectiveness of actions
taken in the United States and other countries to contain and treat the virus.

We do not generate revenues from product sales and may never be profitable.

Our ability to generate revenue and achieve profitability depends on our ability, alone or with strategic partners, to successfully complete the development
of, and obtain the regulatory approvals necessary for, the manufacture and commercialization of our product candidates. We do not anticipate generating
significant revenues from product sales for the foreseeable future, if ever. Our ability to generate future revenues from product sales depends heavily on our
success in:

•
•
•
•

•

completing research and pre-clinical and clinical development of our product candidates;
seeking and obtaining regulatory approvals for product candidates for which we complete clinical trials;
developing a sustainable, scalable, reproducible, and transferable manufacturing process for our product candidates;
establishing and maintaining supply and manufacturing relationships with third parties that can provide adequate (in amount and quality) products
and services to support clinical development and the market demand for our product candidates for which we obtain regulatory approval;
launching and commercializing product candidates for which we obtain regulatory approval, either by collaborating with partners or, if launched
independently, by establishing a sales force, marketing, sales operations and distribution infrastructure;
obtaining market acceptance of our product candidates for which we obtain regulatory approval as viable treatment options;
addressing any competing technological and market developments;
implementing additional internal systems and infrastructure, as needed;
identifying and validating new product candidates;
negotiating favorable terms in any collaboration, licensing or other arrangements into which we may enter;

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• maintaining, protecting and expanding our portfolio of intellectual property rights, including patents, trade secrets and know-how; and
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attracting, hiring and retaining qualified personnel.

Even if one or more of the product candidates that we develop is approved for commercial sale, we anticipate incurring significant costs associated with
commercializing  any  approved  product  candidate.  Our  expenses  could  increase  beyond  expectations  if  we  are  required  by  the  FDA  or  other  regulatory
authorities  outside  the  United  States  to  perform  clinical  trials  or  other  studies  in  addition  to  those  that  we  currently  anticipate.  Even  if  we  are  able  to
generate revenues from the sale of any approved product candidates, we may not become profitable and may need to obtain additional funding to continue
operations.

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Risks Related to Development, Clinical Testing, Regulatory Approval, Marketing, and Coverage and Reimbursement of our Product Candidates

Our product candidates are in early stages of development and must go through clinical trials, which are very expensive, time-consuming and difficult
to design and implement. The outcomes of clinical trials are uncertain, and delays in the completion of or the termination of any clinical trial of our
product candidates could harm our business, financial condition and prospects.

Our research and development programs are at an early stage of development. We must demonstrate our product candidates’ safety and efficacy in humans
through extensive clinical testing, which is expensive and time-consuming and requires specialized knowledge and expertise.

Clinical trials are also expensive and difficult to design and implement, in part because they are subject to rigorous regulatory requirements. The clinical
trial process is also time-consuming, and the outcome is not certain. We estimate that clinical trials of our product candidates will take multiple years to
complete.  Failure  can  occur  at  any  stage  of  a  clinical  trial,  and  we  could  encounter  problems  that  cause  us  to  abandon  or  repeat  clinical  trials.  The
commencement and completion of clinical trials may be delayed or precluded by a number of factors, including:

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delay or failure in reaching agreement with the FDA or other regulatory authority outside the United States on the design of a given trial, or in
obtaining authorization to commence a trial;
delay or failure in reaching agreement on acceptable terms with prospective clinical research organizations (“CROs”) and clinical trial sites;
delay or failure in obtaining approval of an institutional review board (“IRB”) or ethics committees before a clinical trial can be initiated at a given
site;
any  shelter-in-place  orders  from  local,  state  or  federal  governments  or  clinical  trial  site  policies  resulting  from  the  COVID-19  coronavirus
pandemic that determine essential and non-essential functions and staff, which may impact the ability of the staff to conduct assessments or result
in delays to the conduct of the assessments as part of our clinical trial protocols, or impact the ability to enter assessment results into clinical trial
databases in a timely manner;

• withdrawal  of  clinical  trial  sites  from  our  clinical  trials,  including  as  a  result  of  changing  standards  of  care  or  the  ineligibility  of  a  site  to

participate;
delay or failure in recruiting and enrolling subjects in our clinical trials;
delay or failure in having subjects complete a clinical trial or return for post-treatment follow up;
clinical sites or investigators deviating from trial protocol, failing to conduct the trial in accordance with applicable regulatory requirements, or
dropping out of a trial;
inability to identify and maintain a sufficient number of trial sites;
failure of CROs to meet their contractual obligations or deadlines;
the need to modify a trial protocol;
unforeseen safety issues;
emergence of dosing issues;
lack of effectiveness data during clinical trials;
changes in the standard of care of the indication being studied;
reliance  on  third-party  suppliers  for  the  clinical  trial  supply  of  product  candidates  and  failure  by  our  third-party  suppliers  to  comply  with
regulatory requirements or meet their contractual obligations to us in a timely manner, or at all;
inability to monitor subjects adequately during or after treatment;
limitations  on  our  or  our  CROs’  ability  to  access  and  verify  clinical  trial  data  captured  at  clinical  trial  sites  through  monitoring  and  source
document verification;
lack of sufficient funding to finance the clinical trials; and
changes in governmental regulations or administrative action.

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We, the FDA, other regulatory authorities outside the United States, or an IRB may suspend a clinical trial at any time for various reasons, including if it
appears  that  the  clinical  trial  is  exposing  participants  to  unacceptable  health  risks  or  if  the  FDA  or  one  or  more  other  regulatory  authorities  outside  the
United  States  find  deficiencies  in  our  IND  or  similar  application  outside  the  United  States  or  the  conduct  of  the  trial.  If  we  experience  delays  in  the
completion of, or the termination of, any clinical trial

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of any of our product candidates, the commercial prospects of such product candidate will be harmed, and our ability to generate product revenues from
such product candidate will be delayed or rendered impossible. In addition, any delays in completing our clinical trials will increase our costs, slow down
our product candidate development and approval process, and jeopardize our ability to commence product sales and generate revenues.

Even  if  our  clinical  trials  are  successfully  completed  as  planned,  the  results  may  not  support  approval  of  our  product  candidates  under  the  laws  and
regulations  of  the  FDA  or  other  regulatory  authorities  outside  the  United  States.  The  clinical  trial  process  may  fail  to  demonstrate  that  our  product
candidates are both safe and effective for their intended uses. Pre-clinical and clinical data and analyses are often able to be interpreted in different ways.
Even  if  we  view  our  results  favorably,  if  a  regulatory  authority  has  a  different  view,  we  may  still  fail  to  obtain  regulatory  approval  of  our  product
candidates.

Any of these occurrences may harm our business, financial condition, results of operations, cash flows and prospects significantly.

Pre-clinical  studies  and  preliminary  and  interim  data  from  clinical  trials  of  our  product  candidates  are  not  necessarily  predictive  of  the  results  or
success of ongoing or later clinical trials of our product candidates. If we cannot replicate the results from our pre-clinical studies and initial clinical
trials of our product candidates in later clinical trials, we may be unable to successfully develop, obtain regulatory approval for and commercialize our
product candidates.

Pre-clinical studies and any positive preliminary and interim data from our clinical trials of our product candidates may not necessarily be predictive of the
results  of  ongoing  or  later  clinical  trials.  A  number  of  companies  in  the  pharmaceutical  and  biotechnology  industries,  including  us  and  many  other
companies with greater resources and experience than we, have suffered significant setbacks in clinical trials, even after seeing promising results in prior
pre-clinical  studies  and  clinical  trials.  Even  if  we  are  able  to  complete  our  planned  clinical  trials  of  our  product  candidates  according  to  our  current
development  timeline,  initial  positive  results  from  pre-clinical  studies  and  clinical  trials  of  our  product  candidates  may  not  be  replicated  in  subsequent
clinical  trials.  The  design  of  our  later  stage  clinical  trials  could  differ  in  significant  ways  (e.g.,  inclusion  and  exclusion  criteria,  endpoints,  statistical
analysis plan) from our earlier stage clinical trials, which could cause the outcomes of the later stage trials to differ from those of our earlier stage clinical
trials. If we fail to produce positive results in our planned clinical trials of any of our product candidates, the development timeline and regulatory approval
and  commercialization  prospects  for  our  product  candidates,  and,  correspondingly,  our  business  and  financial  prospects,  would  be  materially  adversely
affected.

Because  we  have  limited  resources,  we  may  decide  to  pursue  a  particular  product  candidate  and  fail  to  advance  product  candidates  that  later
demonstrate a greater chance of clinical and commercial success.

We are an early-stage company with limited resources and revenues. The product candidates we currently have under development will require significant
development, pre-clinical and clinical testing and investment of significant funds before their commercialization. Because of this, we must make strategic
decisions regarding resource allocations and which product candidates to pursue, such as our decisions to no longer pursue the development of AB-452 and
AB-506. There can be no assurance that we will be able to develop all potentially promising product candidates that we may identify. Based on preliminary
results, we may choose to advance a particular product candidate that later fails to be successful, and simultaneously forgo or defer further investment in
other  product  candidates  that  later  are  discovered  to  demonstrate  greater  promise  in  terms  of  clinical  and  commercial  success.  If  we  make  resource
allocation decisions that later are shown to be inaccurate, our business and prospects could be harmed.

Several of our current pre-clinical studies and clinical trials are being conducted outside the United States, and the FDA may not accept data from
trials conducted in locations outside the United States.

Several of our current pre-clinical studies and clinical trials are being conducted outside the United States and we may conduct further pre-clinical studies
and  clinical  trials  outside  the  United  States  in  the  future.  We  are  currently  conducting  clinical  trials  in  Moldova,  Thailand,  South  Korea,  Hong  Kong,
Australia and New Zealand. To the extent we do not conduct these clinical trials under an IND, the FDA may not accept data from such trials. Although the
FDA may accept data from clinical trials conducted outside the United States that are not conducted under an IND, the FDA’s acceptance of these data is
subject to certain conditions. For example, the clinical trial must be well designed and conducted and performed by qualified investigators in accordance
with ethical principles. The trial population must also adequately represent the United States population, and the

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data must be applicable to the United States population and United States medical practice in ways that the FDA deems clinically meaningful. In general,
the patient population for any clinical trials conducted outside of the United States must be representative of the population for whom we intend to label the
product in the United States. In addition, while these clinical trials are subject to the applicable local laws, FDA acceptance of the data will be dependent
upon its ability to verify the data and its determination that the trials complied with all applicable United States laws and regulations. We cannot assure you
that the FDA will accept data from trials conducted outside of the United States that are not conducted under an IND. If the FDA does not accept the data
from such clinical trials, we likely would need to conduct additional trials, which would be costly and time-consuming and could delay or permanently halt
our development of our product candidates.

We  cannot  guarantee  how  long  it  will  take  regulatory  agencies  to  review  our  applications  for  product  candidates,  and  we  may  fail  to  obtain  the
necessary regulatory approvals to market our product candidates.

Before we can commercialize our product candidates in the United States, we must obtain approval from the FDA. We must similarly obtain approvals
from comparable regulatory authorities to commercialize our product candidates in jurisdictions outside the United States.

To obtain marketing approval, United States laws require:

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controlled research and human clinical testing that comply with GLP and GCP, as applicable;
establishment of the safety and efficacy of the product for each use sought;
government review and approval of a submission containing, among other things, manufacturing, pre-clinical and clinical data; and
compliance with GMP regulations.

The process of reviewing and approving a drug is time-consuming, unpredictable, and dependent on a variety of factors outside of our control. The FDA
and corresponding regulatory authorities in jurisdictions outside the United States have a significant amount of discretion in deciding whether or not to
approve  a  marketing  application.  Our  product  candidates  could  fail  to  receive  regulatory  approval  from  the  FDA  or  comparable  regulatory  authorities
outside the United States for several reasons, including:

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disagreement with the design or implementation of our clinical trials;
failure to demonstrate that our product candidate is safe and effective for the proposed indication;
failure of clinical trial results to meet the level of statistical significance required for approval;
failure to demonstrate that the product candidate’s benefits outweigh its risks;
disagreement with our interpretation of pre-clinical or clinical data; and
inadequacies in the manufacturing facilities or processes of third-party manufacturers.

The FDA or comparable regulatory authorities outside the United States may require us to conduct additional pre-clinical and clinical testing, which may
delay or prevent approval of a product candidate and our commercialization plans, or cause us to abandon the development program. Further, any approval
we receive may be for fewer or more limited indications than we request, may not include labeling claims necessary for successful commercialization of
the  product  candidate,  or  may  be  contingent  upon  our  conducting  costly  post-marketing  studies.  Any  of  these  scenarios  could  materially  harm  the
commercial prospects of a product candidate, and our operations will be adversely effected.

If  a  particular  product  candidate  causes  undesirable  side  effects,  then  we  may  be  unable  to  receive  regulatory  approval  of  or  commercialize  such
product candidate.

We may experience numerous unforeseen events during, or as a result of, the testing process that could delay or prevent commercialization of any of our
product candidates, including the occurrence of undesirable side effects. Such side effects could lead to clinical trial challenges, such as difficulties in
subject recruitment, retention, and adherence, potential product liability claims, and possible termination by health authorities. These types of clinical trial
challenges could in turn, delay or prevent regulatory approval of our product candidate. Side effects may also lead regulatory authorities to require stronger
product warnings on the product label, costly post-marketing studies, and/or a Risk Evaluation and Mitigation Strategy (“REMS”), among other possible
requirements. If the product candidate has already been approved, such approval may be withdrawn. Any delay in, denial, or withdrawal of marketing
approval for one of our product candidates will adversely affect our business, including our results of operations and financial position. Even if one or more
of our product candidates receives marketing approval, undesirable side effects may limit such product’s commercial viability. Patients may not wish to use
our

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product, physicians may not prescribe our product, and our reputation may suffer. Any of these events may significantly harm our business and financial
prospects.

We may find it difficult to enroll subjects in our clinical trials, which could delay or prevent clinical trials of our product candidates.

Identifying  and  qualifying  subjects  to  participate  in  clinical  trials  of  our  product  candidates  is  critical  to  our  success.  The  timing  of  our  clinical  trials
depends in part on the speed at which we can recruit subjects to participate in testing our product candidates.

We may not be able to identify, recruit and enroll a sufficient number of subjects, or those with required or desired characteristics to achieve diversity in a
clinical trial, or complete our clinical trials in a timely manner. Subject enrollment is affected by a variety factors including, among others:

severity of the disease under investigation;
design of the trial protocol;
prevalence of the disease/size of the patient population;
eligibility criteria for the clinical trial in question;
perceived risks and benefits of the product candidate under study;

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proximity and availability of clinical trial sites for prospective subjects;
ability to recruit clinical trial investigators with the appropriate competencies and experience;
availability of competing therapies and clinical trials;
efforts to facilitate timely enrollment in clinical trials;
ability to obtain and maintain subject consents;
patient referral practices of physicians;
risk that subjects enrolled in clinical trials will drop out of the trials before completion; and
ability to monitor subjects adequately during and after treatment.

If patients are unwilling to participate in our clinical trials, the timeline for recruiting subjects, conducting clinical trials and obtaining regulatory approval
of potential products may be delayed. These delays could result in increased costs, delays in advancing or testing our product candidates or termination of
the clinical trials altogether.

Even if our product candidates obtain regulatory approval, they may be negatively impacted by future development or regulatory difficulties.

Approved drug products are subject to ongoing regulatory requirements and oversight, including requirements related to manufacturing, quality control,
further development, labeling, packaging, storage, distribution, safety surveillance, import, export, advertising, promotion, recordkeeping and reporting. In
addition, we will be subject to continued compliance with GMP and GCP requirements for any clinical trials that we conduct post-approval. If we or any of
the third parties on which we rely fail to meet those requirements, the FDA or comparable regulatory authorities outside the United States could initiate
enforcement action. Other potential consequences include the issuance of fines, warning letters, untitled letters or holds on clinical trials, product seizure or
detention  or  refusal  to  permit  the  import  or  export  of  our  product  candidates,  permanent  injunctions  and  consent  decrees,  or  the  imposition  of  civil  or
criminal  penalties,  any  of  which  could  significantly  impair  our  ability  to  successfully  commercialize  a  given  product.  If  the  FDA  or  a  comparable
regulatory  authority  outside  the  United  States  becomes  aware  of  new  safety  information,  it  can  impose  additional  restrictions  on  how  the  product  is
marketed or may seek to withdraw marketing approval altogether.

We face significant competition from other biotechnology and pharmaceutical companies targeting HBV.

As a significant unmet medical need exists for HBV, there are several large and small pharmaceutical companies focused on delivering therapeutics for
treatment of HBV. These companies include, but are not limited to, Johnson & Johnson, Roche, Vir Biotechnology, GlaxoSmithKline, Gilead Sciences,
Assembly Biosciences, Dicerna Pharmaceuticals, Replicor, Enanta

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Pharmaceuticals and Aligos Therapeutics. Further, it is likely that additional drugs will become available in the future for the treatment of HBV.

Many  of  our  existing  or  potential  competitors  have  substantially  greater  financial,  technical  and  human  resources  than  we  do  and  significantly  greater
experience in the discovery and development of product candidates, as well as in obtaining regulatory approvals of those product candidates in the United
States and other countries. Many of our current and potential future competitors also have significantly more experience commercializing drugs that have
been approved for marketing.

We anticipate significant competition in the HBV market with several early phase product candidates announced. We will also face competition for other
product candidates that we expect to develop in the future. Competition may increase further as a result of advances in the commercial applicability of
technologies and greater availability of capital for investment in these industries. Our competitors may succeed in developing, acquiring or licensing, on an
exclusive basis, product candidates that are more effective or less costly than any product candidate that we may develop.

If  we  successfully  develop  product  candidates,  and  obtain  approval  for  them,  we  will  face  competition  based  on  many  different  factors,  including  the
following:

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safety and effectiveness of our products;
ease with which our products can be administered and the extent to which patients and physicians accept new routes of administration;
timing and scope of regulatory approvals for these products;
availability and cost of manufacturing, marketing and sales capabilities;
price;
reimbursement coverage; and
patent position.

Our  competitors  may  develop  or  commercialize  products  with  significant  advantages  over  any  products  we  develop  based  on  any  of  the  factors  listed
above, or on other factors. Our competitors may therefore be more successful in commercializing their products than we are, which could adversely affect
our competitive position and business. Competitive products may make any products we develop and commercialize obsolete or uncompetitive before we
can recover the expenses of developing and commercializing such products. Such competitors could also recruit our employees, which could negatively
impact our level of expertise and the ability to execute on our business plan.

We are largely dependent on the future commercial success of our HBV product candidates.

Our ability to generate revenues and become profitable will depend in large part on the future commercial success of our HBV product candidates, if they
are approved for marketing. If any product that we commercialize in the future does not gain an adequate level of acceptance among physicians, patients
and third parties, or our estimates of the number of people who have chronic HBV are lower than we expected, we may not generate significant product
revenues or become profitable. Market acceptance by physicians, patients and third party payors of the products we may commercialize will depend on a
number of factors, some of which are beyond our control, including:

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their efficacy, safety and other potential advantages in relation to alternative treatments;
their relative convenience and ease of administration in relation to alternative treatments;
the  availability  of  adequate  coverage  or  reimbursement  by  third  parties,  such  as  insurance  companies  and  other  healthcare  payors,  and  by
government healthcare programs, including Medicare and Medicaid;
the prevalence and severity of adverse events;
their cost of treatment in relation to alternative treatments, including generic products;
the extent and strength of our third party manufacturer and supplier support;
the extent and strength of marketing and distribution support;
the limitations or warnings contained in a product’s approved labeling; and
distribution  and  use  restrictions  imposed  by  the  FDA  or  other  regulatory  authorities  outside  the  United  States  or  that  are  part  of  a  REMS  or
voluntary risk management plan.

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For example, even if our products have been approved by the FDA, physicians and patients may not immediately be receptive to them and may be slow to
adopt  them.  If  our  products  do  not  achieve  an  adequate  level  of  acceptance  among  physicians,  patients  and  third  party  payors,  we  may  not  generate
meaningful revenues and we may not become profitable.

We may incur substantial liabilities and may be required to limit commercialization of our products in response to product liability lawsuits.

The testing and marketing of medical products entail an inherent risk of product liability. Product liability claims may be brought against us by patients,
healthcare providers or others using, administering or selling our products. Large judgments have been awarded in class action lawsuits based on drugs that
had unanticipated side effects, which is an example of just one possible product liability claim that may be brought against us. If we cannot successfully
defend  ourselves  against  product  liability  claims,  we  may  incur  substantial  liabilities  or  be  required  to  limit  commercialization  of  our  products.  Our
inability to obtain sufficient product liability insurance at an acceptable cost to protect against potential product liability claims could prevent or inhibit the
commercialization of products we develop, alone or with partners. Although we currently have product liability insurance coverage for our clinical trials
for expenses or losses, our insurance coverage is limited to $10 million per occurrence, and $10 million in the aggregate, and may not reimburse us or may
not be sufficient to reimburse us for any or all expenses or losses we may suffer. Moreover, insurance coverage is becoming increasingly expensive and in
the future, we may not be able to maintain insurance coverage at a reasonable cost or in sufficient amounts to protect us against losses due to liability. We
intend  to  expand  our  insurance  coverage  to  include  the  sale  of  commercial  products  if  we  obtain  marketing  approval  for  our  product  candidates  in
development, but we may be unable to obtain commercially reasonable product liability insurance for any products approved for marketing. Further, even if
our  agreements  with  any  current  or  future  partners  entitle  us  to  indemnification  against  losses,  such  indemnification  may  not  be  available  or  adequate
should any claims arise. A successful product liability claim or series of claims brought against us could cause our share price to fall and, if judgments
exceed our insurance coverage, could decrease our cash and adversely affect our business.

Coverage  and  adequate  reimbursement  may  not  be  available  for  our  product  candidates,  which  could  make  it  difficult  for  us  to  sell  our  products
profitably.

Market  acceptance  and  sales  of  any  products  that  we  develop  will  depend  in  part  on  the  extent  to  which  reimbursement  for  these  products  and  related
treatments will be available from third party payors, including government health administration authorities and private health insurers. Third party payors
decide  which  drugs  they  will  pay  for  and  establish  reimbursement  levels.  Third  party  payors  often  rely  upon  Medicare  coverage  policy  and  payment
limitations in setting their own reimbursement policies. However, decisions regarding the extent of coverage and amount of reimbursement to be provided
for  each  of  our  products  will  be  made  on  a  plan  by  plan  basis.  One  payor’s  determination  to  provide  coverage  for  a  product  does  not  assure  that  other
payors will also provide coverage, and adequate reimbursement, for the product. Additionally, a third party payor’s decision to provide coverage for a drug
does  not  imply  that  an  adequate  reimbursement  rate  will  be  approved.  Each  plan  determines  whether  or  not  it  will  provide  coverage  for  a  drug,  what
amount it will pay the manufacturer for the drug, and on what tier of its formulary the drug will be placed. The position of a drug on a formulary generally
determines the copayment that a patient will need to make to obtain the drug and can strongly influence the adoption of a drug by patients and physicians.
Patients  who  are  prescribed  treatments  for  their  conditions  and  providers  performing  the  prescribed  services  generally  rely  on  third  party  payors  to
reimburse all or part of the associated healthcare costs. Patients are unlikely to use our products unless coverage is provided and reimbursement is adequate
to cover a significant portion of the cost of our products.

A primary trend in the United States healthcare industry and elsewhere is cost containment. Third party payors have attempted to control costs by limiting
coverage  and  the  amount  of  reimbursement  for  particular  medications.  We  cannot  be  sure  that  coverage  and  reimbursement  will  be  available  for  any
product that we commercialize and, if reimbursement is available, what the level of reimbursement will be. Inadequate coverage and reimbursement may
impact the demand for, or the price of, any product for which we obtain marketing approval. If coverage and adequate reimbursement is not available, or is
available only to limited levels, we may not be able to successfully commercialize any product candidates that we develop.

Additionally,  there  have  been  a  number  of  legislative  and  regulatory  proposals  to  change  the  healthcare  system  in  the  United  States  and  in  some
jurisdictions  outside  the  United  States  that  could  affect  our  ability  to  sell  any  future  products  profitably.  These  legislative  and  regulatory  changes  may
negatively impact the reimbursement for any future products, following approval.

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We are subject to United States and Canadian healthcare laws and regulations, which could expose us to criminal sanctions, civil penalties, contractual
damages, reputational harm, fines, disgorgement, exclusion from participation in government healthcare programs, curtailment or restricting of our
operations and diminished profits and future earnings.

Healthcare providers, physicians and others will play a primary role in the recommendation and prescription of any products for which we obtain marketing
approval.  Our  future  arrangements  with  healthcare  providers,  patients  and  third  party  payors  will  expose  us  to  broadly  applicable  United  States  and
Canadian fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and collaborative partners
through  which  we  market,  sell  and  distribute  any  products  for  which  we  obtain  marketing  approval.  Restrictions  under  applicable  federal  and  state
healthcare laws and regulations include the following:

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the federal Anti-Kickback Law prohibits persons from, among other things, knowingly and willfully soliciting, offering, receiving or providing
remuneration,  directly  or  indirectly,  in  cash  or  in  kind,  to  induce  or  reward,  or  in  return  for,  the  referral  of  an  individual  for  the  furnishing  or
arranging for the furnishing, or the purchase, lease or order, or arranging for or recommending purchase, lease or order, any good or service for
which payment may be made under a federal healthcare program such as Medicare and Medicaid;

the  federal  civil  False  Claims  Act  imposes  civil  penalties,  sometimes  pursued  through  whistleblower  or  qui  tam  actions,  against  individuals  or
entities  for,  among  other  things,  knowingly  presenting,  or  causing  to  be  presented  claims  for  payment  of  government  funds  that  are  false  or
fraudulent  or  making  a  false  statement  material  to  an  obligation  to  pay  money  to  the  government  or  knowingly  concealing  or  knowingly  and
improperly avoiding, decreasing, or concealing an obligation to pay money to the federal government;

• HIPAA  imposes  criminal  liability  for  knowingly  and  willfully  executing  a  scheme  to  defraud  any  healthcare  benefit  program,  knowingly  and
willfully  embezzling  or  stealing  from  a  health  care  benefit  program,  willfully  obstructing  a  criminal  investigation  of  a  health  care  offense,  or
knowingly and willfully making false statements relating to healthcare matters;

• HIPAA  and  its  implementing  regulations  also  impose  obligations  on  certain  covered  entity  health  care  providers,  health  plans  and  health  care
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. We may obtain health information from third parties (including research institutions from which we obtain clinical trial data)
that are subject to privacy and security requirements under HIPAA. Although we are not directly subject to HIPAA - other than with respect to
providing certain employee benefits - we could potentially be subject to criminal penalties if we, our affiliates, or our agents knowingly obtain,
use, or disclose individually identifiable health information maintained by a HIPAA-covered entity in a manner that is not authorized or permitted
by HIPAA;

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numerous federal and state laws and regulations that address privacy and data security, including state data breach notifications laws, state health
information and/or genetic privacy laws, and federal and state consumer protection laws (e.g., Section 5 of the Federal Trade Commission Act, or
FTC Act, and the CCPA), govern the collection, use, disclosure and protection of health-related and other personal information, many of which
differ from each other in significant ways, thus complicating the compliance efforts. Compliance with these laws is difficult, constantly evolving,
and time-consuming, and companies that do not comply with these laws may face government enforcement actions, civil and/or criminal penalties,
or private action, as well as adverse publicity that could negatively affect our operating results and business;

the federal Physician Payment Sunshine Act, being implemented as the Open Payments Program, which requires manufacturers of drugs, devices,
biologics,  and  medical  supplies  for  which  payment  is  available  under  Medicare,  Medicaid  or  the  Children’s  Health  Insurance  Program  (with
certain exceptions) to report annually to CMS information related to direct or indirect payments and other transfers of value to physicians and
teaching  hospitals  (and  certain  other  practitioners  beginning  in  2022),  as  well  as  ownership  and  investment  interests  held  in  the  company  by
physicians and their immediate family members; and

analogous state laws and laws and regulations outside the United States, such as state anti-kickback and false claims laws, which may apply to
sales or marketing arrangements and claims involving healthcare items or services reimbursed by non-governmental third-party payors, including
private insurers; state laws and laws outside the United

39

States  that  require  pharmaceutical  companies  to  comply  with  the  pharmaceutical  industry’s  voluntary  compliance  guidelines  and  the  relevant
compliance  guidance  promulgated  by  the  federal  government  or  otherwise  restrict  payments  that  may  be  made  to  certain  healthcare  providers;
state laws and laws outside the United States that require drug manufacturers to report information related to clinical trials, or information related
to payments and other transfers of value to physicians and other healthcare providers or marketing expenditures; state laws that restrict the ability
of manufacturers to offer co-pay support to patients for certain prescription drugs; and state laws and local ordinances that require identification or
licensing of sales representatives.

Efforts to ensure that our collaborations with third parties, and our business generally, will comply with applicable United States and Canadian healthcare
laws and regulations will involve substantial costs. It is possible that governmental authorities will conclude that our business practices may not comply
with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are
found to be in violation of any of these laws or any other governmental laws and regulations that may apply to us, we may be subject to significant civil,
criminal  and  administrative  penalties,  damages,  fines,  imprisonment,  exclusion  of  products  from  government  funded  healthcare  programs,  contractual
damages,  reputational  harm,  disgorgement,  curtailment  or  restricting  of  our  operations,  any  of  which  could  substantially  disrupt  our  operations  and
diminish our profits and future earnings. If any of the physicians or other providers or entities with whom we expect to do business is found not to be in
compliance  with  applicable  laws,  they  may  be  subject  to  criminal,  civil  or  administrative  sanctions,  including  exclusions  from  government  funded
healthcare programs. The risk of our being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the
regulatory authorities or the courts, and their provisions are open to a variety of interpretations.

Failure to comply with the United States Foreign Corrupt Practices Act (“FCPA”), and potentially other global anti-corruption and anti-bribery laws
such as the Canadian Corruption of Foreign Public Officials Act, could subject us to penalties and other adverse consequences.

We are subject to the FCPA, and potentially other applicable domestic or foreign anti-corruption or anti-bribery laws, which generally prohibit companies
from engaging in bribery or other prohibited payments to foreign officials for the purpose of obtaining or retaining business and requires companies to
maintain accurate books and records and internal controls, including at foreign-controlled subsidiaries.

Compliance  with  these  anti-corruption  laws  and  anti-bribery  laws  may  be  expensive  and  difficult,  particularly  in  countries  in  which  corruption  is  a
recognized problem. In addition, these laws present particular challenges in the pharmaceutical industry, because, in many countries, hospitals are operated
by the government, and physicians and other hospital employees are considered to be foreign officials. Certain payments to hospitals in connection with
clinical trials and other work have been deemed to be improper payments to governmental officials and have led to FCPA enforcement actions.

We can make no assurance that our employees or other agents will not engage in prohibited conduct under our policies and procedures and anti-corruption
laws and anti-bribery laws such as FCPA for which we might be held responsible. If our employees or other agents are found to have engaged in such
practices, we could suffer severe penalties and other consequences that may have a material adverse effect on our business, financial condition and results
of operations.

Risks Related to Our Dependence on Third Parties

We depend on our license agreement with Alnylam for the commercialization of ONPATTRO.

In  2012,  we  entered  into  a  license  agreement  with  Alnylam  that  entitles  Alnylam  to  develop  and  commercialize  products  with  our  LNP  technology.
Alnylam received FDA approval in August 2018 and launched ONPATTRO immediately upon approval. We are entitled to low to mid-single-digit royalty
payments escalating based on sales performance and received our first royalty payment in the fourth quarter of 2018. In July 2019, we sold this royalty
entitlement to OMERS, the defined benefit pension plan for municipal employees based in the Province of Ontario, Canada, effect as of January 1, 2019,
for $20 million in gross proceeds before advisory fees. OMERS will retain this royalty entitlement until it has received $30 million in royalties, at which
point 100% of this royalty entitlement on future global net sales of ONPATTRO will revert to us. The possibility and timing of any possible reversion of the
royalty entitlement is affected by many factors including:

40

• Alnylam’s and its distributors’ and sublicensees’ ability to effectively market and sell ONPATTRO in each country where sold;
•
•
•
•
•

the manner of sale, whether directly by Alnylam or by sublicensees or distributors, and the terms of sublicensing and distribution agreements;
the amount and timing of sales of Alnylam in each country;
regulatory approvals, appropriate labeling, and desirable pricing, insurance coverage and reimbursement;
competition; and
commencement of marketing in additional countries.

If Alnylam is not successful in commercializing ONPATTRO, the royalty entitlement may never revert back to Arbutus.

We expect to depend in part on our licensing agreements for a significant portion of our revenues for the foreseeable future and to develop, conduct
clinical trials with, obtain regulatory approvals for, and manufacture, market and sell some of our product candidates. If these licensing agreements
are unsuccessful, or anticipated milestone or royalty payments are not received, our business could be materially adversely affected.

We  expect  that  we  will  depend  in  part  on  our  licensing  agreements  with  Alnylam  and  Gritstone  to  provide  revenue  to  partially  fund  our  operations,
especially in the near term. Furthermore, our strategy is to enter into various additional arrangements with corporate and academic collaborators, licensors,
licensees and others for the research, development, clinical testing, manufacturing, marketing and commercialization of our product candidates or other
products based upon our technology. We may be unable to continue to establish such licensing agreements, and any licensing agreements we do establish
may be unsuccessful, or we may not receive milestone payments or royalties as anticipated.

Should any licensing partner fail to develop or ultimately successfully commercialize any of the product candidates or technology to which it has obtained
rights,  our  business  may  be  adversely  affected.  In  addition,  once  initiated,  there  can  be  no  assurance  that  any  of  these  licensing  agreements  will  be
continued or result in successfully commercialized products. Failure of a licensing partner to continue funding any particular program could delay or halt
the development or commercialization of any products arising out of such program. In addition, there can be no assurance that the licensing partners will
not pursue alternative technologies or develop alternative products either on their own or in collaboration with others, including our competitors.

We are dependent on Assembly pursuant to our clinical collaboration agreement and, therefore, are subject to the efforts of Assembly and our ability to
successfully collaborate with Assembly.

In August 2020, we entered into a clinical collaboration agreement with Assembly to evaluate AB-729 in combination with Assembly’s lead HBV core
inhibitor (capsid inhibitor) candidate VBR and standard-of-care NA therapy for the treatment of subjects with chronic HBV infection. Under the terms of
the agreement, this trial will be a randomized, multi-center, open-label Phase 2 clinical trial that will evaluate the safety, pharmacokinetics, and antiviral
activity of the triple combination of AB-729, VBR, and an NA compared to the double combinations of VBR with an NA and AB-729 with an NA. This
trial has initiated screening and is anticipated to enroll approximately 60 virologically-suppressed patients with HBeAg negative chronic HBV infection.
Patients  will  be  dosed  for  48  weeks  with  AB-729  60  mg  subcutaneously  every  8  weeks  and  VBR  300  mg  orally  once  daily,  with  a  48-week  follow-up
period. Assembly  will  be  responsible  for  managing  the  clinical  trial.  Under  the  terms  of  the  collaboration,  we  and  Assembly  may  also  add  additional
cohorts in the future to evaluate other patient populations and/or combinations. The success of our collaboration with Assembly depends upon the efforts of
Assembly, to the extent it is responsible for performance of collaboration activities. Assembly may not be successful in performance of such activities.
Assembly may change its strategic focus or pursue alternative technologies. In addition, if we have a dispute or enter into litigation with Assembly in the
future, it could delay development programs, distract management from other business activities, and generate substantial expense. Except to the extent
necessary to carry out Assembly’s responsibilities with respect to the collaboration trial, we have not provided any license grant to Assembly for use of our
AB-729 compound.

If conflicts arise between our collaboration or licensing partners and us, our collaboration or licensing partners may act in their best interest and not in
our best interest, which could adversely affect our business.

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Conflicts may arise with our collaboration or licensing partners, including Alnylam, Gritstone and Assembly, if they pursue alternative therapies for the
diseases that we have targeted or develop alternative products either on their own or in collaboration with others. Competing products, either developed by
our  present  collaboration  or  licensing  partners  or  any  future  partners  or  to  which  our  present  partners  or  any  future  partners  have  rights,  may  result  in
development delays or the withdrawal of their support for one or more of our product candidates.

Additionally, conflicts may arise if there is a dispute about the progress of, or other activities related to, the clinical development of a product candidate, the
achievement and payment of a milestone amount, the payment of royalties or the ownership of intellectual property that is developed during the course of
the  collaborative  arrangement.  Similarly,  the  parties  to  a  licensing  agreement  may  disagree  as  to  which  party  owns  newly  developed  products.  If  an
agreement is terminated as a result of a dispute and before we have realized the benefits of the collaboration or licensing arrangement, our reputation could
be harmed and we might not obtain revenues that we anticipated receiving.

We  rely  on  third  parties  to  conduct  our  clinical  trials,  and  if  they  fail  to  fulfill  their  obligations,  perform  services  in  a  satisfactory  manner,  and/or
comply with applicable legal or regulatory requirements, our development plans may be adversely affected.

We rely on independent clinical investigators, CROs and other third-party service providers to assist us in managing, monitoring and otherwise carrying out
our  clinical  trials.  We  have  contracted  with,  and  we  plan  to  continue  to  contract  with,  certain  third  parties  to  provide  certain  services,  including  site
selection,  enrollment,  monitoring  and  data  management.  Although  we  depend  heavily  on  these  parties  and  have  contractual  agreements  governing  their
activities, we do not control them and therefore, we cannot be assured that these third parties will adequately perform all of their contractual obligations to
us. If our third-party service providers cannot adequately fulfill their obligations to us on a timely and satisfactory basis or if the quality or accuracy of our
clinical  trial  data  is  compromised  due  to  failure  to  adhere  to  our  protocols  or  regulatory  requirements,  or  if  such  third  parties  otherwise  fail  to  meet
deadlines or follow legal or regulatory requirements, our development plans may be delayed or terminated.

If any of our relationships with these third-parties terminate, we may not be able to enter into arrangements with alternative third parties on commercially
reasonable terms or at all. Switching or adding additional third-party service providers involves additional cost and requires management time and focus. In
addition,  there  is  a  natural  transition  period  when  a  new  third-party  service  provider  begins  work.  As  a  result,  delays  may  occur,  which  can  materially
impact our ability to meet our desired development timelines.

We  rely  exclusively  on  third  parties  to  formulate  and  manufacture  our  product  candidates,  which  exposes  us  to  a  number  of  risks  that  may  delay
development, regulatory approval and commercialization of our products or result in higher product costs.

We have limited experience in drug formulation or manufacturing and we lack the resources and expertise to formulate or manufacture our own product
candidates  internally.  Therefore,  we  rely  on,  and  expect  to  continue  to  rely  on,  third-party  expertise  to  support  us  in  this  area.  We  have  entered  into
contracts with third-party manufacturers to manufacture, supply, store and distribute supplies of our product candidates for our clinical trials. If any of our
product  candidates  receive  FDA  approval,  we  expect  to  rely  on  third-party  contractors  to  manufacture  our  products.  We  have  no  current  plans  to  build
internal manufacturing capacity for any product candidate, and we have no long-term supply arrangements.

Our reliance on third-party manufacturers exposes us to potential risks, such as the following:

• we  may  be  unable  to  contract  with  third-party  manufacturers  on  acceptable  terms,  or  at  all,  because  the  number  of  potential  manufacturers  is
limited.  Potential  manufacturers  of  any  product  candidate  that  is  approved  will  be  subject  to  FDA  compliance  inspections  and  any  new
manufacturer would have to be qualified to produce our products;
our third-party manufacturers might be unable to formulate and manufacture our product candidates and products in the volume and of the quality
required to meet our clinical and commercial needs, if any;
our third-party manufacturers may not perform as agreed or may not remain in the contract manufacturing business for the time required to supply
our clinical trials through completion or to successfully produce, store and distribute our commercial products, if approved;

•

•

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•

•

•

drug  manufacturers  are  subject  to  ongoing  periodic  unannounced  inspection  by  the  FDA  and  other  government  agencies  to  ensure  compliance
with  cGMP  and  other  government  regulations  and  corresponding  foreign  standards.  We  do  not  have  control  over  third-party  manufacturers’
compliance with these regulations and standards, but we may ultimately be responsible for any of their failures;
if any third-party manufacturer makes improvements in the manufacturing process for our product candidates, we may not own, or may have to
share, the intellectual property rights to such improvements; and
a third-party manufacturer may gain knowledge from working with us that could be used to supply one of our competitors with a product that
competes with ours.

Each  of  these  risks  could  delay  or  have  other  adverse  impacts  on  our  clinical  trials  and  the  approval  and  commercialization  of  our  product  candidates,
potentially resulting in higher costs, reduced revenues or both.

Risks Related to Our Intellectual Property

Other companies or organizations may assert patent rights that prevent us from developing or commercializing our products.

RNA interference, capsid inhibitors and RNA destabilizer, as well as our other novel HBV assets, are relatively new scientific fields that have generated
many  different  patent  applications  from  organizations  and  individuals  seeking  to  obtain  patents  in  the  field.  These  applications  claim  many  different
methods, compositions and processes relating to the discovery, development and commercialization of these therapeutic products. Because the field is so
new, very few of these patent applications have been fully processed by government patent offices around the world, and there is a great deal of uncertainty
about which patents will be issued, when, to whom, and with what claims. It is likely that there could be litigation and other proceedings, such as inter parte
review and opposition proceedings in various patent offices, relating to patent rights in RNAi, capsid inhibitors, RNA destabilizer and other small molecule
compounds targeted at HBV. We are aware of patents and patent applications owned by third parties that may in the future be alleged by such third parties
to cover the use of one or more of our products. We may need to acquire or obtain a license from such third parties to any such issued patents to market or
sell any such products, which may not be available on commercially acceptable terms or at all. If such third parties obtain valid and enforceable patents and
successfully prove infringement of an approved Arbutus product, and we are not able to acquire such issued patents or negotiate a license on acceptable
terms, and if such approved Arbutus product is determined to infringe any such issued patents, then we may be forced to pay royalties, damages and costs,
or we may be prevented from commercializing such approved Arbutus product altogether, which could have a material adverse impact on our business.

Our patents and patent applications may be challenged and may be found to be invalid, which could adversely affect our business.

Certain United States, Canadian and international patents and patent applications we own involve complex legal and factual questions for which important
legal principles are largely unresolved. For example, no consistent policy has emerged for the breadth of biotechnology patent claims that are granted by
the United States Patent and Trademark Office or enforced by the United States federal courts. In addition, the coverage claimed in a patent application can
be significantly reduced before a patent is issued. Also, we face at least the following intellectual property risks:

•
•
•
•
•

some or all patent applications may not result in the issuance of a patent;
patents issued to us may not provide us with any competitive advantages;
patents could be challenged by third parties;
competitors may find ways to design around our patents; and
competitors could independently develop products which duplicate our products.

A number of industry competitors and institutions have developed technologies, filed patent applications or received patents on various technologies that
may be related to or affect our business. Some of these technologies, applications or patents may conflict with our technologies or patent applications. Such
conflict could limit the scope of the patents, if any, that we may be able to obtain or result in the denial of our patent applications. In addition, we could
incur substantial costs in filing suits against others to have such patents declared invalid. As publication of discoveries in the scientific or patent literature
often lags behind actual discoveries, we cannot be certain we or any licensor was the first creator of inventions covered by pending patent

43

applications or that we or such licensor was the first to file patent applications for such inventions. Any future proceedings could result in substantial costs,
even if the eventual outcomes are favorable. There can be no assurance that our patents, if issued, will be held valid or enforceable by a court or that a
competitor’s technology or product would be found to infringe such patents.

We may incur substantial costs as a result of litigation or other proceedings relating to patent and other intellectual property rights which could have a
material  adverse  effect  on  our  business,  financial  condition  and  results  of  operations  and  could  cause  the  market  value  of  our  common  shares  to
decline.

There has been significant litigation in the biotechnology industry over contractual obligations, patents and other proprietary rights, and we may become
involved  in  various  types  of  litigation  that  arise  from  time  to  time.  Involvement  in  litigation  could  consume  a  substantial  portion  of  our  resources,
regardless of the outcome of the litigation. Counterparties in litigation may be better able to sustain the costs of litigation because they have substantially
greater resources. If claims against us are successful, in addition to any potential liability for damages, we could be required to obtain a license, grant cross-
licenses,  and  pay  substantial  milestones  or  royalties  in  order  to  continue  to  develop,  manufacture  or  market  the  affected  products.  Involvement  and
continuation of involvement in litigation may result in significant and unsustainable expense, and divert management’s attention from ongoing business
concerns and interfere with our normal operations. Litigation is also inherently uncertain with respect to the time and expenses associated therewith, and
involves risks and uncertainties in the litigation process itself, such as discovery of new evidence or acceptance of unanticipated or novel legal theories,
changes in interpretation of the law due to decisions in other cases, the inherent difficulty in predicting the decisions of judges and juries and the possibility
of appeals. Ultimately we could be prevented from commercializing a product or be forced to cease some aspect of our business operations as a result of
claims of patent infringement or violation of other intellectual property rights and the costs associated with litigation, which could have a material adverse
effect on our business, financial condition, and operating results and could cause the market value of our common shares to decline.

Confidentiality  agreements  with  employees  and  others,  including  collaborators,  may  not  adequately  prevent  disclosure  of  trade  secrets  and  other
proprietary information.

Much of our know-how and technology may constitute trade secrets. There can be no assurance, however, that we will be able to meaningfully protect our
trade secrets. In order to protect our proprietary technology and processes, we rely in part on confidentiality agreements with our collaborators, employees,
vendors, consultants, outside scientific collaborators and sponsored researchers, and other advisors. These agreements offer only limited protection, and as
such  may  not  effectively  prevent  disclosure  of  confidential  information  and  also  may  not  provide  an  adequate  remedy  in  the  event  of  unauthorized
disclosure of confidential information. In addition, others may independently discover trade secrets and proprietary information, and in such cases we could
not assert any trade secret rights against such party. Costly and time consuming litigation could continue to be necessary to enforce and determine the scope
of our proprietary rights, and failure to obtain or maintain trade secret protection could adversely affect our competitive business position.

Risks Related to the Ownership of our Common Shares

The concentration of common share ownership with insiders, as well as director nomination rights held by the largest shareholder, will likely limit the
ability of the other shareholders to influence corporate matters.

As of March 1, 2021, executive officers, directors, five percent or greater shareholders, and their respective affiliated entities beneficially owned, in the
aggregate, approximately 26% of our outstanding common shares.

Entities associated with Roivant Sciences Ltd. (“Roivant”) collectively held as a group approximately 23% of our outstanding common shares as of March
1,  2021.  In  addition,  in  October  2017,  we  issued  500,000  Series  A  participating  convertible  preferred  shares  (“Preferred  Shares”)  to  Roivant  for  gross
proceeds of $50.0 million. We issued a second tranche of 664,000 Preferred Shares to Roivant in January 2018 for gross proceeds of $66.4 million. The
Preferred Shares are non-voting and are convertible into common shares at a conversion price of $7.13 per share (which represents a 15% premium to the
closing price of $6.20 per share on October 16, 2017). The Preferred Shares are currently not convertible into common shares. The purchase price for the
Preferred Shares plus an amount equal to 8.75% per annum, compounded annually, will be subject to mandatory conversion into approximately 23 million
common  shares  on  October  18,  2021  (subject  to  limited  exceptions  in  the  event  of  certain  fundamental  corporate  transactions  relating  to  our  capital
structure or assets, which would permit earlier conversion at

44

Roivant’s option). Assuming the Preferred Shares were converted as of March 1, 2021, Roivant would have held approximately 39 million common shares,
or,  32%,  of  our  outstanding  common  shares.  Roivant  has  agreed  to  a  four  year  lock-up  period  and  standstill  period  whereby,  pursuant  to  the  standstill,
Roivant will not acquire greater than 49.99% of our common shares or securities convertible into common shares. Both the lockup and standstill periods
expire on October 18, 2021. Following the expiration of the standstill period, Roivant will no longer be contractually prohibited from acquiring control of
our company.

As a result, Roivant can significantly influence the outcome of matters requiring shareholder approval, including the election of directors, amendments of
our organizational documents, or approval of any merger, sale of assets or other major corporate transaction. This may prevent or discourage unsolicited
acquisition proposals or offers for our common shares that you may feel are in your best interest. The interests of Roivant may not always coincide with
your  interests  or  the  interests  of  other  shareholders  and  they  may  act  in  a  manner  that  advances  their  best  interests  and  not  necessarily  those  of  other
shareholders, including seeking a premium value for their common shares. These actions might affect the prevailing market price for our common shares.
In  addition,  Roivant  and  certain  of  our  other  principal  shareholders  that  have  held  their  shares  for  several  years  may  be  more  interested  in  selling  our
company  to  an  acquiror  than  other  investors,  or  they  may  want  us  to  pursue  strategies  that  deviate  from  the  interests  of  other  shareholders.  Such
concentration of ownership control may also:

•
•
•

delay, defer or prevent a change in control;
entrench our management and/or the board of directors; or
impede a merger, consolidation, takeover or other business combination involving us that other shareholders may desire.

In  addition,  for  so  long  as  Roivant  has  beneficial  ownership  or  exercises  control  or  direction  over  not  less  than:  (i)  30%  of  the  issued  and  outstanding
common shares (including common shares issuable upon the conversion of the Preferred Shares), Roivant has the right to nominate three individuals for
election to our board of directors, one of whom must be “independent” within the meaning of applicable law and the rules and regulations of The Nasdaq
Stock Market LLC, not including the rules related to the independence of audit committee members; (ii) 20% of the issued and outstanding common shares
(including  common  shares  issuable  upon  the  conversion  of  the  Preferred  Shares),  Roivant  has  the  right  to  nominate  two  individuals  for  election  to  our
board of directors; and (iii) 10% of the issued and outstanding common shares (including common shares issuable upon the conversion of the Preferred
Shares), Roivant has the right to nominate one individual for election to our board of directors. For so long as Roivant has the right to nominate one or
more directors to our board of directors, the total number of directors will not, without the prior written consent of Roivant, be permitted to exceed eight
directors, the majority of whom must be “independent.” While the directors appointed by Roivant are obligated to act in accordance with their fiduciary
duty to the Company, they may have equity or other interests in Roivant and, accordingly, their personal interests may be aligned with Roivant’s interests,
which may not always coincide with our corporate interests or the interests of our other shareholders. The directors are required to disclose any potential
material conflicts of interest. The current Roivant nominated directors are Frank Torti, M.D., our Chairman of the Board, Eric Venker, M.D., Pharm.D. and
Keith Manchester, M.D.

We are incorporated in Canada, with our assets located both in Canada and the United States, with the result that it may be difficult for investors to
enforce judgments obtained against us or some of our officers.

We  are  incorporated  under  the  laws  of  the  Province  of  British  Columbia  and  some  of  our  assets  are  located  outside  the  United  States.  While  we  have
appointed National Registered Agents, Inc. as our agent for service of process to effect service of process within the United States upon us, it may not be
possible  for  you  to  enforce  against  us  or  our  insiders  in  the  United  States,  judgments  obtained  in  United  States  courts  based  upon  the  civil  liability
provisions of the United States federal securities laws or other laws of the United States. In addition, there is doubt as to whether original action could be
brought  in  Canada  against  us  or  our  directors  or  officers  based  solely  upon  United  States  federal  or  state  securities  laws  and  as  to  the  enforceability  in
Canadian courts of judgments of United States courts obtained in actions based upon the civil liability provisions of United States federal or state securities
laws.

Conversely, all of our directors and officers reside outside Canada, and the majority of our physical assets are also located outside Canada. While we have
appointed Farris LLP as our agent for service of process in Canada, it may not be possible for you to enforce in Canada against our assets or those directors
and officers residing outside Canada, judgments obtained in Canadian courts based upon the civil liability provisions of the Canadian securities laws or
other laws of Canada.

45

If we are deemed to be a “passive foreign investment company” for the current or any future taxable year, investors who are subject to United States
federal taxation would likely suffer materially adverse United States federal income tax consequences.

We generally will be a “passive foreign investment company” under the meaning of Section 1297 of the Code (a “PFIC”) if (a) 75% or more of our gross
income  is  “passive  income”  (generally,  dividends,  interest,  rents,  royalties,  and  gains  from  the  disposition  of  assets  producing  passive  income)  in  any
taxable year, or (b) if at least 50% or more of the quarterly average value of our assets produce, or are held for the production of, passive income in any
taxable year. We have determined that we have not been a PFIC for the three taxable years ended December 31, 2020, however recent changes to Treasury
regulations under the Code have made this determination more challenging for us, and we cannot provide any assurances that we will not become a PFIC in
the future. If we are a PFIC for any taxable year during which a United States person holds our common shares, it would likely result in materially adverse
United States federal income tax consequences for such United States person, including, but not limited to, any gain from the sale of our common shares
would  be  taxed  as  ordinary  income,  as  opposed  to  capital  gain,  and  such  gain  and  certain  distributions  on  our  common  shares  would  be  subject  to  an
interest charge, except in certain circumstances. It may be possible for United States persons to fully or partially mitigate such tax consequences by making
a “qualifying electing fund election,” as defined in the Code (a “QEF Election”), but although we have provided this information in the past, there is no
requirement that we do so.

Our articles and certain Canadian laws could delay or deter a change of control.

Our preferred shares are available for issuance from time to time at the discretion of our board of directors, without shareholder approval. Our articles allow
our board, without shareholder approval, to determine the special rights to be attached to our preferred shares, and such rights may be superior to those of
our common shares.

In addition, limitations on the ability to acquire and hold our common shares may be imposed by the Competition Act in Canada. This legislation permits
the Commissioner of Competition of Canada to review any acquisition of a significant interest in us. This legislation grants the Commissioner jurisdiction
to challenge such an acquisition before the Canadian Competition Tribunal if the Commissioner believes that it would, or would be likely to, result in a
substantial lessening or prevention of competition in any market in Canada. The Investment Canada Act subjects an acquisition of control of a Canadian-
company  by  a  non-Canadian  to  government  review  if  the  value  of  our  assets,  as  calculated  pursuant  to  the  legislation,  exceeds  a  threshold  amount.  A
reviewable acquisition may not proceed unless the relevant minister is satisfied that the investment is likely to result in a net benefit to Canada. Any of the
foregoing could prevent or delay a change of control and may deprive or limit strategic opportunities for our shareholders to sell their shares.

General Risk Factors

If we are unable to attract and retain qualified key management, scientific staff, consultants and advisors, our ability to implement our business plan
may be adversely affected.

We depend upon our senior executive officers as well as key scientific, management and other personnel. The competition for qualified personnel in the
biotechnology field is intense. We rely heavily on our ability to attract and retain qualified managerial, scientific and technical staff. The loss of the service
of any of the members of our senior management, including William H. Collier, our President and Chief Executive Officer, Michael J. Sofia, our Chief
Scientific Officer, and Gaston Picchio, our Chief Development Officer, may adversely affect our ability to develop our technology, add to our pipeline,
advance our product candidates and manage our operations. We do not carry key person life insurance on any of our employees.

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  other  entities  and  may  have  commitments  under  consulting  or  advisory
contracts with those entities that may limit their availability to us. If we are unable to continue to attract and retain highly qualified personnel, our ability to
develop and commercialize our product candidates will be limited.

46

We could face liability from our controlled use of hazardous and radioactive materials in our research and development processes.

We use certain radioactive materials, biological materials and chemicals, including organic solvents, acids and gases stored under pressure, in our research
and  development  activities.  Our  use  of  radioactive  materials  is  regulated  by  the  United  States  Nuclear  Regulatory  Commission  and  Pennsylvania
Department of Environmental Protection for the possession, transfer, import, export, use, storage, handling and disposal of radioactive materials. Our use of
biological materials and chemicals, including the use, manufacture, storage, handling and disposal of such materials and certain waste products is regulated
by a number of federal, state and local laws and regulations. Although we believe that our safety procedures for handling such materials comply with the
standards prescribed by such laws and regulations, the risk of accidental contamination or injury from these materials cannot be completely eliminated. In
the event of such an accident, we could be held liable for any damages that result or penalized with fines, and any such liability could exceed our resources.
We are not specifically insured with respect to this liability.

Our business, reputation, and operations could suffer in the event of information technology system failures, such as a cybersecurity breach.

We are increasingly dependent on sophisticated software applications and computing infrastructure to conduct critical operations. Disruption, degradation,
or  manipulation  of  these  applications  and  systems  through  intentional  or  accidental  means  could  materially  adversely  impact  key  business  processes.
Despite the implementation of security measures, including controls over unauthorized access, our internal computer systems and those of our contractors
and  consultants  are  vulnerable  to  damage  from  computer  viruses,  cybersecurity  breaches  and  other  forms  of  unauthorized  access,  as  well  as  natural
disasters, terrorism, war, telecommunication and electrical failures, cyberattacks or cyber-intrusions over the Internet, loss of funds or information from
phishing or other fraudulent schemes, attachments to emails, persons inside our organization, or persons with access to systems inside our organization or
those with whom we do business. The risk of a security breach or disruption, particularly through cyberattacks or cyber-intrusions, including by computer
hackers, foreign governments and cyber terrorists, has generally increased as the number, intensity and sophistication of attempted attacks and intrusions
from  around  the  world  have  increased.  Such  events  could  result  in  exposure  of  confidential  information,  the  modification  of  critical  data,  the  loss  of
Company funds and/or the failure or interruption of critical operations. For example, the loss of pre-clinical trial data or data from completed or ongoing
clinical trials for our product candidates could result in delays in our regulatory filings and development efforts and significantly increase our costs. There
can be no assurance that our efforts to protect data and systems will prevent service interruption or the loss of critical or sensitive information from our or
third party providers’ databases or systems. To the extent that any disruption or security breach results in such interruption or loss, we could incur material
financial,  legal,  business  or  reputational  harm,  the  development  of  our  product  candidates  could  be  delayed,  and  our  insurance  may  not  provide  any  or
adequate coverage of any such losses.

We may acquire other assets or businesses, or form strategic alliances or collaborations or make investments in other companies or technologies that
could harm our financial condition, results of operations or cash flows, dilute our shareholders’ ownership, incur debt or cause us to incur significant
expense.

As  part  of  our  business  strategy,  we  may  pursue  acquisitions  of  assets  or  businesses,  or  strategic  alliances  or  collaborations,  to  expand  our  existing
technologies and operations. We may not identify or complete these transactions in a timely manner, on a cost-effective basis, or at all, and we may not
realize the anticipated benefits of any such transaction, any of which could have a detrimental effect on our financial condition, results of operations or cash
flows.  We  may  not  be  able  to  find  suitable  acquisition  candidates,  and  if  we  make  any  acquisitions,  we  may  not  be  able  to  integrate  these  acquisitions
successfully  into  our  existing  business  and  we  may  incur  debt  or  assume  unknown  or  contingent  liabilities  in  connection  therewith.  Integration  of  an
acquired company or assets may also disrupt ongoing operations, require the hiring of additional personnel and the implementation of additional internal
systems and infrastructure, especially the acquisition of commercial assets, and require management resources that would otherwise focus on developing
our existing business. We may not be able to find suitable collaboration partners or identify other investment opportunities, and we may experience losses
related to any such investments.

To finance any acquisitions or collaborations, we may choose to issue debt or equity securities as consideration. Any such issuance of shares would dilute
the ownership of our shareholders. If the price of our common shares is low or volatile, we may not be able to acquire other assets or businesses or fund a
transaction using our equity securities as consideration. Alternatively,

47

it may be necessary for us to raise additional capital for acquisitions through public or private financings. Additional capital may not be available on terms
that are favorable to us, or at all.

48

Item 1B. Unresolved Staff Comments

There are currently no unresolved staff comments.

Item 2. Properties

Since  November  1,  2016,  we  have  had  a  lease  agreement  for  our  headquarters  at  701  Veterans  Circle,  Warminster,  Pennsylvania.  The  building  has
approximately 35,000 square feet of laboratory facilities and office space. The lease expires on April 30, 2027. We also have the option of extending the
lease for two further five-year terms.

Since January 1, 2019, we have leased approximately 8,500 square feet of office space at 626 Jacksonville Rd, Warminster, Pennsylvania. The lease has a
three year term and we have an option to extend the lease term to April 30, 2027.

Previously,  we  leased  51,000  square  feet  of  laboratory  facilities  and  office  space  located  at  100-8900  Glenlyon  Parkway,  Burnaby,  British  Columbia,
Canada. In early 2018, we implemented a site consolidation and organizational restructuring to align our HBV business in Warminster, Pennsylvania. We
ceased use of our Burnaby facility for R&D activities as of June 30, 2018 and we allowed the lease to expire according to its terms on July 31, 2019.

We believe that the total space available to us under our current leases will meet our needs for the foreseeable future and that additional space would be
available to us on commercially reasonable terms if required.

Item 3. Legal Proceedings

We are involved with various legal matters arising in the ordinary course of business. We make provisions for liabilities when it is both probable that a
liability has been incurred and the amount of the loss can be reasonably estimated. Such provisions are reviewed at least quarterly and adjusted to reflect
the  impact  of  any  settlement  negotiations,  judicial  and  administrative  rulings,  advice  of  legal  counsel,  and  other  information  and  events  pertaining  to  a
particular case. Litigation is inherently unpredictable. Although the ultimate resolution of these various matters cannot be determined at this time, we do
not believe that such matters, individually or in the aggregate, will have a material adverse effect on our consolidated results of operations, cash flows, or
financial condition.

University of British Columbia

Certain early work on lipid nanoparticle delivery systems and related inventions was undertaken at the University of British Columbia (“UBC”), as well as
by us that was subsequently assigned to UBC. These inventions are licensed to the Company by UBC under a license agreement, initially entered into in
1998 and as amended in 2001, 2006 and 2007. The Company has granted sublicenses under the UBC license to certain third parties, including Alnylam. In
November 2014, UBC filed a demand for arbitration against the Company which alleged entitlement to unpaid royalties. In August 2019, the arbitrator
issued his decision, awarding UBC $5.9 million, which included interest of approximately $2.6 million. The Company paid the $5.9 million award to UBC
in September 2019 and recorded a charge of $6.3 million, consisting of $5.9 million for the award (including interest) and $0.4 million for an estimate of a
potential award for costs and attorneys’ fees. An award for costs and attorneys’ fees is still to be determined.

On December 18, 2020, UBC delivered to us a notice of arbitration alleging that under its cross license with us, it is due royalties of $2.0 million plus
interest arising from our sale to OMERS of part of our royalty interest on future global net sales of ONPATTRO, currently being sold by Alnylam. We do
not believe that any royalties are due to UBC and we intend to vigorously contest UBC’s allegation.

Item 4. Mine Safety Disclosures

Not applicable.

49

 
PART II

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

Our common shares trade on the Nasdaq Global Select Market under the symbol “ABUS” following our name change to Arbutus Biopharma Corporation
on July 31, 2015. As of March 3, 2021, there were 102 registered holders of common shares and 95,583,915 common shares issued and outstanding.

Securities Authorized for Issuance under Equity Compensation Plans

Information regarding securities authorized for issuance under equity compensation plans is incorporated by reference into the information in Part III, Item
12 of this Form 10-K.

Recent Sales of Unregistered Securities

We did not issue any unregistered equity securities during the year ended December 31, 2020.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

We did not repurchase any of our equity securities during the year ended December 31, 2020.

Item 6. Selected Financial Data

We are a smaller reporting company as defined by Rule 12b-2 of the Securities Exchange Act of 1934 and are not required to provide the information under
this item.

50

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

Overview

We are a clinical-stage, biopharmaceutical company focused primarily on developing a cure for people with chronic hepatitis B virus (“HBV”) infection.
We are advancing multiple product candidates with distinct mechanisms of action that we believe have the potential to provide a new curative regimen for
chronic HBV infection. We have also initiated a drug discovery and development effort for treating coronaviruses, including COVID-19.

Given the biology of HBV, we believe combination therapies are the key to more effective HBV treatment and a potential functional cure. Our product
pipeline includes multiple product candidates that target various steps in the viral lifecycle. We believe each of these mechanisms, when administered for a
finite duration in combination with existing approved therapies, have the potential to improve upon the standard of care and potentially lead to a functional
cure.

Our HBV product pipeline consists of the following programs:

Our two lead product candidates are AB-729, our proprietary subcutaneously-delivered RNAi product candidate that suppresses HBsAg expression, and
AB-836,  our  proprietary  next-generation  oral  capsid  inhibitor  that  suppresses  HBV  DNA  replication.  AB-729  is  currently  in  an  ongoing  Phase  1a/1b
clinical trial and we expect AB-836 to progress into a Phase 1a/1b clinical trial in the first half of 2021. In parallel, we are in lead optimization with oral
compounds for our PD-L1 program and next-generation HBV RNA destabilizer program. At this time, our coronavirus research program is focused on the
discovery and development of new molecular entities that address specific viral targets including the nsp12 viral polymerase and the nsp5 viral protease.

COVID-19 Impact

In December 2019, an outbreak of a novel strain of coronavirus (COVID-19) was identified in Wuhan, China. This virus continues to spread globally, has
been declared a pandemic by the World Health Organization and has spread to nearly every country in the world. The impact of this pandemic has been,
and will likely continue to be, extensive in many aspects of society. The pandemic has resulted in and will likely continue to result in significant disruptions
to businesses. A number of countries and other jurisdictions around the world have implemented extreme measures to try and slow the spread of the virus.
These measures include the closing of businesses and requiring people to stay in their homes, the latter of which raises uncertainty regarding the ability to
travel to hospitals in order to participate in clinical trials. Additional measures that have had, and will

51

    
likely continue to have, a major impact on clinical development, at least in the near-term, include shortages and delays in the supply chain, and prohibitions
in certain countries on enrolling subjects in new clinical trials. Future disruptions related to the COVID-19 pandemic could negatively impact our plans and
timelines in 2021 and beyond, including enrolling and monitoring subjects in our clinical trials.

Collaborations and Royalty Entitlements

In August 2020, we entered into a clinical collaboration agreement with Assembly Biosciences, Inc. (“Assembly”) to evaluate AB-729 in combination with
Assembly’s lead HBV core inhibitor (capsid inhibitor) candidate vebicorvir (“VBR”) and standard-of-care NA therapy for the treatment of patients with
chronic HBV infection. We and Assembly will share in the costs of the collaboration.

We  have  a  royalty  entitlement  on  ONPATTRO®  (Patisiran)  (“ONPATTRO”),  a  drug  developed  by  Alnylam  Pharmaceuticals,  Inc.  (“Alnylam”)  under  a
license agreement with us that incorporates our lipid nanoparticle delivery (“LNP”) technology. In July 2019, we received $20 million in gross proceeds
before advisory fees from the sale of this royalty interest to Ontario Municipal Employees Retirement System (“OMERS”), effective as of January 1, 2019.
The royalty interest will revert back to us after OMERS receives $30 million in royalty payments from Alnylam. We also have rights to a second, lower
royalty interest on global net sales of ONPATTRO originating from a settlement agreement and subsequent license agreement with Acuitas Therapeutics,
Inc. (“Acuitas”). The royalty entitlement from Acuitas has been retained by us and was not part of the royalty entitlement sale to OMERS.

As of December 31, 2020, we owned approximately 16% of the common equity of Genevant Sciences Ltd. (“Genevant”), a company we launched with
Roivant Sciences, Ltd. and to which we licensed exclusive rights to our lipid nanoparticle ("LNP") and ligand conjugate delivery platforms for RNA-based
applications  outside  of  HBV,  except  to  the  extent  certain  rights  had  already  been  licensed  to  other  third  parties  (the  “Genevant  License”).  Under  the
Genevant  License,  we  are  entitled  to  receive  tiered  low  single-digit  royalties  on  future  sales  of  Genevant  products  covered  by  the  licensed  patents.  If
Genevant  sub-licenses  the  intellectual  property  licensed  by  us  to  Genevant,  we  are  entitled  to  receive  under  the  Genevant  License,  upon  the
commercialization of a product developed by such sub-licensee, the lesser of (i) twenty percent of the revenue received by Genevant for such sublicensing
and (ii) tiered low single-digit royalties on product sales by the sublicensee.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Contingent Consideration

The significant accounting policy that we believe to be most critical in fully understanding and evaluating our financial results relates to our contingent
consideration. This accounting policy requires us to make certain estimates and assumptions. We believe that the estimates and assumptions upon which we
rely are reasonable, based upon information available to us at the time that these estimates and assumptions are made.  Actual results may differ from our
estimates. Our critical accounting estimates affect the calculation of our net income or loss.

In connection with the acquisition of Enantigen Therapeutics, Inc. (“Enantigen”) in October 2014, we have obligations to make potential future payments
of  up  to  $102.5  million  upon  the  achievement  of  certain  commercial  milestones. The  sales  milestones  are  tied  to  the  first  commercial  sales  by  us  of  a
product  indicated  for  the  treatment  of  HBV.    These  potential  contingent  payments  are  recorded  as  a  liability  and  remeasured  to  fair  value  as  of  each
reporting  date.    In  assessing  the  fair  value  of  the  liability,  significant  judgments  are  required  to  be  made  by  management  to  estimate  the  probability  of
program success, the timing and extent of future product sales, appropriate discount rates, and other estimates and assumptions that could materially affect
the determination of fair value. These judgments include the use of, but are not limited to: future forecasts and other macroeconomic indicators that forecast
market conditions, the timing and amount of estimated future revenues, market-based discount rates and other market-comparative data. As assumptions
related to the probability of program success and timing and amount of potential future product sales are highly uncertain due to the unpredictable nature of
product development, management risk adjusts the estimated cash flows to reflect these uncertainties. 

52

 
RESULTS OF OPERATIONS

The following summarizes our results of operations for the year ended December 31, 2020 compared to the year ended December 31, 2019:
Year Ended December 31,

Total revenue
Impairment of intangible assets
Impairment of goodwill
Total other operating expenses

Loss from operations

Other income (loss)

Loss before income taxes

Income tax benefit

Net loss

Dividend accretion of convertible preferred shares

Net loss attributable to common shares

2020

2019

(in thousands)

6,914  $
— 
— 
64,720 
(57,806)
(5,939)
(63,745)
— 
(63,745)
(12,123)
(75,868) $

6,011 
43,836 
22,471 
83,605 
(143,901)
(22,478)
(166,379)
12,656 
(153,723)
(11,149)
(164,872)

$

$

For  the  fiscal  year  ended  December  31,  2020,  our  net  loss  attributable  to  common  shares  was  $75.9  million,  or  a  loss  of  $1.00  per  basic  and  diluted
common share, as compared to a net loss of $164.9 million, or a loss of $2.89 per basic and diluted common share, for the year ended December 31, 2019.

Revenue

Revenue for the years ended December 31, 2020 and 2019 is summarized in the following table:

Revenue from collaborations and licenses

Acuitas Therapeutics, Inc.
Gritstone Oncology, Inc.
Acrotech Biopharma, LLC

Non-cash royalty revenue

Alnylam Pharmaceuticals, Inc.
Total revenue

Year ended December 31,

2020

2019

(in thousands, except percentages)

$

$

3,259 
— 
269 

3,386 
6,914 

47 % $
— %
4 %

49 %
100 % $

1,931 
1,819 
605 

1,656 
6,011 

32 %
30 %
10 %

28 %
100 %

Revenue consists mainly of royalties received from other companies for sales of products that utilize our licensed technologies.

Total revenue increased $0.9 million for the year ended December 31, 2020 compared to 2019, primarily due to a $3.1 million increase in license royalty
revenue from Alnylam and Acuitas due to the growth of Alnylam’s sales of ONPATTRO. This increase was partially offset by a $1.8 million decrease in
revenue from Gritstone Oncology, Inc. primarily due to a $1.5 million milestone payment received in 2019.

The royalty interest for ONPATTRO from Alnylam was sold to OMERS, effective as of January 1, 2019, for $20 million in gross proceeds before advisory
fees. OMERS will retain this entitlement until it has received $30 million in royalties, at which point 100% of such royalty interest on future global net
sales of ONPATTRO will revert back to us. OMERS has assumed the risk of collecting up to $30 million of future royalty payments from Alnylam and we
are not obligated to reimburse OMERS if they fail to collect any such future royalties. During the term of this agreement, we recognize non-cash royalty
revenue related

53

 
 
 
 
to the sales of ONPATTRO. From the inception of the royalty sale through December 31, 2020, the Company has recorded an aggregate of $5.1 million of
non-cash royalty revenue for royalties earned by OMERS. The royalty interest for ONPATTRO from Acuitas was not part of the royalty sale to OMERS
and we have retained the rights to receive those royalties. Revenue contracts are described in more detail in “Item 1. Business.”

Operating expenses

Operating expenses for the years ended December 31, 2020 and 2019 are summarized in the following table:

Research and development
General and administrative
Depreciation
Change in fair value of contingent consideration
Site consolidation
Impairment of intangible assets
Impairment of goodwill
Arbitration

Total operating expenses

Research and development

Year ended December 31,

2020

2019

(in thousands, except percentages)

$

$

47,481 
14,724 
1,978 
473 
64 
— 
— 
— 
64,720 

73 % $
23 %
3 %
1 %
— %
— %
— %
— %
100 % $

57,601 
17,727 
2,028 
(173)
156 
43,836 
22,471 
6,266 
149,912 

38 %
12 %
1 %
— %
— %
29 %
15 %
4 %
100 %

Research  and  development  expenses  consist  primarily  of  personnel  expenses,  fees  paid  to  clinical  research  organizations  and  contract  manufacturers,
consumables and materials, consulting, and other third party expenses to support our clinical and pre-clinical activities, as well as a portion of stock-based
compensation and general overhead costs.

Research  and  development  expenses  decreased  $10.1  million  in  2020  compared  to  2019  due  primarily  to  the  October  2019  decision  to  discontinue
development of AB-506, our prior generation capsid inhibitor product candidate and higher expenses for AB-729 during 2019 for preclinical studies and
drug product supply in preparation for our Phase 1a/1b clinical trial which commenced in the second quarter of 2019. These decreases were partially offset
by an increase in expenses associated with development of our lead capsid inhibitor product candidate (AB-836), including preclinical studies and drug
product supply in preparation for our Phase 1a/1b clinical trial, which is expected to initiate in the first half of 2021.

A  significant  portion  of  our  research  and  development  expenses  are  not  tracked  by  project,  as  they  benefit  multiple  projects  or  our  overall  technology
platform.

General and administrative

General and administrative expenses decreased $3.0 million in 2020 compared to 2019, due primarily to severance related to the departure of our former
President and Chief Executive Officer in June 2019. In accordance with the terms of his legacy employment agreement, our former President and Chief
Executive  Officer  received  $2.3  million  of  cash  severance  and  we  recognized  $1.1  million  of  non-cash  stock-based  compensation  expense  for  the
accelerated vesting of his stock options in 2019. In addition, legal fees decreased $1.1 million in 2020 compared to 2019 due primarily to the settlement of
an arbitration case with the University of British Columbia (“UBC”) in September 2019. These decreases in general and administrative expenses in 2020
compared to 2019 were partially offset by increases in employee compensation and insurance premiums.

Change in fair value of contingent consideration

In October 2014, Arbutus Inc., our wholly-owned subsidiary, acquired all of the outstanding shares of Enantigen pursuant to a stock purchase agreement.
The amount paid to Enantigen’s selling shareholders could be up to an additional $102.5 million in

54

 
 
 
 
 
sales performance milestones in connection with the sale of the first commercialized product by us for the treatment of HBV, regardless of whether such
product is based upon assets acquired under this agreement, and a low single-digit royalty on net sales of such first commercialized HBV product, up to a
maximum royalty payment of $1.0 million.

In  general,  increases  in  the  fair  value  of  the  contingent  consideration  are  related  to  the  progress  of  our  programs  as  they  get  closer  to  triggering  these
contingent payments. In 2020, the fair value of our contingent consideration liability increased $0.5 million related to the passage of time. In 2019, the fair
value  of  our  contingent  consideration  liability  decreased  by  $0.2  million  after  we  re-evaluated  the  timing  of  the  future  sales  milestones  following  the
discontinuation of the AB-506 program.

Site consolidation charges

In  February  2018,  we  announced  a  site  consolidation  and  organizational  restructuring  to  better  align  our  HBV  business  in  Warminster,  PA,  including
closing  our  Burnaby,  Canada  facility.  Most  of  the  employee-related  site  consolidation  expenses  were  expensed  ratably  over  the  period  that  employees
provided  services,  which  was  substantially  completed  in  2018.  Total  site  consolidation  expenses  were  $5.0  million,  which  was  fully  recognized  as  of
December 31, 2020.

Impairment of intangible assets and goodwill

In 2019, we recorded a $43.8 million non-cash impairment expense to reduce the carrying value of its in-process research and development (“IPR&D”)
intangible assets to zero. We also recognized a corresponding income tax benefit of $12.7 million in 2019 related to the decrease in our deferred tax liability
related to the IPR&D intangible assets. The impairment was due to a decision to delay indefinitely the further development of our cccDNA program while
we focus on our other development programs.

Also  during  2019,  we  recorded  a  $22.5  million  non-cash  impairment  to  reduce  the  carrying  amount  of  our  goodwill  asset  to  zero.  Due  to  a  sustained
decrease in our share price in the months leading-up to the assessment, our market capitalization was reduced below the book value of our net assets and
we concluded that the fair value of our single reporting unit was below its carrying amount by an amount in excess of the carrying amount of the goodwill
asset.

We did not record any impairments during 2020.

Arbitration

In  the  third  quarter  of  2019,  the  arbitrator  in  the  arbitration  proceedings  between  UBC  and  us  issued  his  decision,  awarding  UBC  approximately  $5.9
million, which included interest of approximately $2.6 million. An award for costs and attorneys’ fees is still to be determined. We recorded expense of
$6.3  million  in  2019,  consisting  of  $5.9  million  for  the  award  (including  interest)  and  $0.4  million  for  an  estimate  of  a  potential  award  for  costs  and
attorney’s fees.

This arbitration concerned certain early work on lipid nanoparticle delivery systems and related inventions undertaken by us and assigned to UBC. These
inventions were subsequently licensed back to us by UBC under a license agreement, initially entered into in 1998 and subsequently amended in 2001,
2006 and 2007. We have granted sublicenses under the UBC license to Alnylam as well as other third parties.

On December 18, 2020, UBC delivered to us a notice of arbitration alleging that under its cross license with us, it is due royalties of $2.0 million plus
interest arising from our sale to OMERS of part of our royalty interest on future global net sales of ONPATTRO, currently being sold by Alnylam.

55

Other income (losses)

Other income (losses) for the years ended December 31, 2020 and 2019 are summarized in the following table:

Interest income
Interest expense
Equity investment loss
Foreign exchange gain (loss)
Total other loss

Interest income

2020

741 
(4,011)
(2,545)
(124)
(5,939)

Year ended December 31,

2019

(in thousands, except percentages)

(12)% $
68 %
43 %
2 %
101 % $

2,111 
(2,108)
(22,522)
41 
(22,478)

$

$

(9)%
9 %
100 %
— %
100 %

Interest income decreased $1.4 million in 2020 compared to 2019 due primarily to a general decline in market interest rates.

Interest expense

Interest expense increased $1.9 million in 2020 compared to 2019 due primarily to the non-cash amortization of discount and issuance costs related to the
sale of a portion of our ONPATTRO royalty interest to OMERS in July 2019.

Equity investment loss

In July 2020, we participated in the recapitalization of Genevant, led by Roivant, with an equity investment of $2.5 million. We determined that this $2.5
million  additional  investment  in  Genevant  was  funding  prior  losses  and  recorded  the  amount  as  an  equity  investment  loss  in  2020.  Due  to  our  loss  of
significant influence with respect to Genevant as a result of the recapitalization, we discontinued the use of equity method accounting for our interest in
Genevant  in  2020.  Following  the  recapitalization,  we  account  for  our  interest  in  Genevant  as  equity  securities  without  readily  determinable  fair  values.
Accordingly, an estimate of the fair value of the securities is based on the original cost less previously recognized equity method losses, less impairments,
plus or minus changes resulting from future observable price changes in orderly transactions for identical or similar Genevant securities. As of December
31, 2020, the carrying value of our investment in Genevant was zero and we owned approximately 16% of the common equity of Genevant.

The equity investment losses for 2019 reflected our proportionate share of Genevant’s net results under the equity method of accounting on a one-quarter
lag basis of $14.9 million and a $7.6 million impairment charge to reduce the carrying value of our investment in Genevant to zero. The impairment was
due to uncertainty surrounding the recovery of the remaining carrying value of our investment in Genevant.

Foreign exchange gains (losses)

In connection with our site consolidation to Warminster, PA, our Canadian dollar-denominated expenses and cash balances have decreased significantly
now that a majority of our business transactions are based in the United States. We continue to incur expenses and hold some cash balances in Canadian
dollars, and as such, we will remain subject to risks associated with foreign currency fluctuations. During the year ended December 31, 2020, we recorded
foreign exchange losses of $0.1 million. During the year ended December 31, 2019, we recorded foreign exchange gains of less than $0.1 million.

Income tax benefit

For the year ended December 31, 2019, we recorded an income tax benefit of $12.7 million related to the decrease of our deferred tax liability associated
with impairments of our IPR&D intangible assets.

56

 
LIQUIDITY AND CAPITAL RESOURCES 

Since our incorporation, we have financed our operations through the sales of equity, debt, revenues from research and development collaborations and
licenses  with  corporate  partners,  a  royalty  monetization,  interest  income  on  funds  available  for  investment,  and  government  contracts,  grants  and  tax
credits.

As of December 31, 2020, we had cash and cash equivalents of $52.3 million and investments in marketable securities of $71.0 million, totaling $123.3
million. We had no outstanding debt as of December 31, 2020.

Sources of Liquidity

In December 2018, we entered into an Open Market Sale Agreement (“Sale Agreement”) with Jefferies LLC (“Jefferies”), under which we could issue and
sell our common shares, from time to time, for an aggregate sales price of up to $50.0 million. In December 2019, we entered into an amendment to the
Sale Agreement with Jefferies (the “2019 Amendment”) in connection with the filing of a shelf registration statement on Form S-3 (File No. 333-235674),
filed with the SEC on December 23, 2019 (the “Shelf Registration Statement”). The 2019 Amendment revised the original Sale Agreement to reflect that
we may sell our common shares, from time to time, for an aggregate sales price of up to $50.0 million, under the Shelf Registration Statement. During July
2020, we fully utilized the remaining availability under the Sale Agreement, as amended by the 2019 Amendment. In August 2020, we entered into a new
amendment to the Sale Agreement (the “2020 Amendment”) with Jefferies. Pursuant to the 2020 Amendment, we can issue and sell common shares, from
time  to  time,  for  an  aggregate  sales  price  of  up  to  an  additional  $75.0  million  under  the  Sale  Agreement.  During  2020,  we  issued  24,728,368  common
shares under the Sale Agreement, as amended, resulting in net proceeds of approximately $86.3 million. From January 1, 2021 through March 3, 2021, we
received an additional $24.3 million of net proceeds from the issuance of our common shares under the Sale Agreement, as amended, and as of March 3,
2021 there was approximately $16.4 million available under the Sale Agreement, as amended.

In August 2020, we filed a new $200 million shelf registration statement on Form S-3 (File No. 333-248467), which was declared effective by the SEC on
October  22,  2020  (the  “New  Shelf  Registration  Statement”).  As  of  March  4,  2021,  we  have  not  sold  any  securities  under  the  New  Shelf  Registration
Statement.

Additionally, we have a royalty entitlement on ONPATTRO, a drug developed by Alnylam that incorporates our LNP technology and was approved by the
FDA and the EMA during the third quarter of 2018 and was launched by Alnylam immediately upon approval in the United States. In July 2019, we sold a
portion of this royalty interest to OMERS, effective as of January 1, 2019, for $20 million in gross proceeds before advisory fees. OMERS will retain this
entitlement until it has received $30 million in royalties, at which point 100% of such royalty interest on future global net sales of ONPATTRO will revert
to us. OMERS has assumed the risk of collecting up to $30 million of future royalty payments from Alnylam and Arbutus is not obligated to reimburse
OMERS if they fail to collect any such future royalties. If this royalty entitlement reverts to us, it has the potential to provide an active royalty stream or to
be otherwise monetized again in full or in part. In addition to the royalty from the Alnylam LNP license agreement, we are also receiving a second, lower
royalty interest on global net sales of ONPATTRO originating from a settlement agreement and subsequent license agreement with Acuitas. The royalty
from Acuitas has been retained by us and was not part of the royalty sale to OMERS.

Cash requirements

At December 31, 2020 we held an aggregate of $123.3 million in cash, cash equivalents and investments in marketable securities. From January 1, 2021
through March 3, 2021, we received an additional $24.3 million of net proceeds from the issuance of common shares under the ATM program. We believe
that our cash resources will be sufficient to fund our operations through the third quarter of 2022 based on our expectation of a net cash burn between $70
million and $75 million in 2021. In the future, substantial additional funds will be required to continue with the active development of our pipeline products
and technologies. In particular, our funding needs may vary depending on a number of factors including:

•

•

the effects of the COVID-19 pandemic on our business, the medical community and the global economy;

revenue  earned  from  our  legacy  collaborative  partnerships  and  licensing  agreements,  including  potential  royalty  payments  from  Alnylam’s
ONPATTRO;

57

•

•

•

•

•

revenue earned from ongoing collaborative partnerships, including milestone and royalty payments;

the extent to which we continue the development of our product candidates, add new product candidates to our pipeline, or form collaborative
relationships to advance our product candidates;

delays in the development of our product candidates due to pre-clinical and clinical findings;

our  decisions  to  in-license  or  acquire  additional  products,  product  candidates  or  technology  for  development,  in  particular  for  our  HBV
therapeutics programs;

our ability to attract and retain corporate partners, and their effectiveness in carrying out the development and ultimate commercialization of our
product candidates;

• whether batches of drugs that we manufacture fail to meet specifications resulting in delays and investigational and remanufacturing costs;

•

•

•

the decisions, and the timing of decisions, made by health regulatory agencies regarding our technology and products;

competing technological and market developments; and

costs  associated  with  prosecuting  and  enforcing  and  defending  our  patent  claims  and  other  intellectual  property  rights,  including  litigation  and
arbitration arising in the course of our business activities.

We intend to seek funding to maintain and advance our business from a variety of sources including public or private equity or debt financing, potential
monetization transactions, collaborative or licensing arrangements with pharmaceutical companies and government grants and contracts. There can be no
assurance that funding will be available at all or on acceptable terms to permit further development of our research and development programs. Further, the
continued spread of COVID-19 has also led to severe disruption and volatility in the global capital markets, which could increase our cost of capital and
adversely affect our ability to access the capital markets in the future.

If adequate funding is not available, we may be required to delay, reduce or eliminate one or more of our research or development programs or reduce
expenses associated with our non-core activities. We may need to obtain funds through arrangements with collaborators or others that may require us to
relinquish most or all of our rights to product candidates at an earlier stage of development or on less favorable terms than we would otherwise seek if we
were better funded. Insufficient financing may also mean failing to prosecute our patents or relinquishing rights to some of our technologies that we would
otherwise develop or commercialize.

Cash Flows

The following table summarizes our cash flow activities for the periods indicated:

Net loss
Non-cash items
Net change in operating items
Net cash used in operating activities
Net cash provided by (used in) investing activities
Net cash provided by financing activities
Effect of foreign exchange rate changes on cash and cash equivalents
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period

Year ended December 31,

2020

2019

(in thousands)

(63,745) $
11,873 
431 
(51,441) $
(14,909)
86,746 
56 
20,452  $
31,799 
52,251  $

(153,723)
84,942 
(2,225)
(71,006)
28,338 
37,457 
68 
(5,143)
36,942 
31,799 

$

$

$

$

Net  cash  used  in  operating  activities  in  2020  decreased  $19.6  million  compared  to  2019  due  primarily  to  (i)  a  decrease  in  research  and  development
payments of approximately $10.1 million, which was due primarily to the October 2019 decision to

58

 
discontinue development of AB-506, our prior generation capsid inhibitor product candidate, and (ii) higher spend on AB-729 during 2019 for preclinical
studies and drug product supply in preparation for our Phase 1a/1b clinical trial which commenced in the second quarter of 2019. The decrease in cash used
in operating activities in 2020 compared to 2019 was also due to the payment of a $5.9 million arbitration award to UBC in 2019 and a $2.3 million cash
severance payment to our former President and Chief Executive Officer in 2019.

Net  cash  from  investing  activities  in  2020  decreased  by  $43.2  million  compared  to  2019  due  primarily  to  the  timing  of  maturities  and  acquisitions  of
investments in marketable securities.

Net cash from financing activities in 2020 increased $49.3 million compared to 2019. Cash provided by financing activities in 2020 consisted primarily of
$86.3 million of proceeds from sales of common shares under the Sale Agreement, as amended. Cash provided by financing activities in 2019 consisted
primarily of $18.5 million of net proceeds from the sale a portion of our future royalties from sales of ONPATTRO and $18.6 million of proceeds from
sales of common shares under the Sale Agreement, as amended.

OFF-BALANCE SHEET ARRANGEMENTS

We do not have any off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on our financial condition, changes
in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that are material to investors.

RECENT ACCOUNTING PRONOUNCEMENTS

From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board or other standard setting bodies that we adopt
as of the specified effective date. Unless otherwise discussed, we believe that the impact of recently issued standards that are not yet effective will not have
a material impact on our financial position or results of operations upon adoption.

Please refer to note 2 to our consolidated financial statements included in Part II, Item 8, “Financial Statements and Supplementary Data,” of this Annual
Report on Form 10-K for a description of recent accounting pronouncements applicable to our business. 

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

Not applicable.

59

 
 
 
Item 8. Financial Statements and Supplementary Data

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm
Consolidated Balance Sheets at December 31, 2020 and 2019
Consolidated Statements of Operations and Comprehensive Loss for the Years Ended December 31, 2020 and 2019
Consolidated Statements of Stockholders’ Equity for the Years Ended December 31, 2020 and 2019
Consolidated Statements of Cash Flows for the Years Ended December 31, 2020 and 2019
Notes to Consolidated Financial Statements

Page
61
63
64
65
66
67

60

 
 
Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Arbutus Biopharma Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Arbutus Biopharma Corporation (the Company) as of December 31, 2020 and 2019, and
the related consolidated statements of operations and comprehensive loss, stockholders' equity, and cash flows for each of the two years in the period ended
December 31, 2020, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial
statements present fairly, in all material respects, the financial position of the Company at December 31, 2020 and 2019, and the results of its operations
and its cash flows for each of the two years in the period ended December 31, 2020, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial
statements  based  on  our  audits.  We  are  a  public  accounting  firm  registered  with  the  Public  Company  Accounting  Oversight  Board  (United  States)
(PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and
regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor
were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of
internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over
financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and
performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in
the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as
evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or
required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2)
involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion
on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion
on the critical audit matter or on the accounts or disclosures to which it relates.

61

Description of the Matter

Valuation of contingent consideration liability
As discussed in Note 11 to the consolidated financial statements, the Company’s contingent consideration liability, which
consists of sales-based milestones and royalties, resulting from the acquisition of Enantigen in 2014, is remeasured to its
estimated fair value each reporting period. As of December 31, 2020, the contingent consideration liability was $3.4
million. Auditing the valuation of the contingent consideration liability was complex and highly judgmental due to the
significant estimation required in determining the fair value. In particular, the fair value estimate was sensitive to
significant assumptions such as the probability of successfully commercializing a treatment for the hepatitis B virus, the
timing and amount of future revenues related to commercial sales, and the discount rate. These assumptions are affected by
expectations about future industry, regulatory, market or economic conditions and are forward-looking and inherently
uncertain.

How We Addressed the Matter
in Our Audit

To test the estimated fair value of the contingent consideration liability, we performed audit procedures that included,
among others, assessing the terms of the arrangement, evaluating the methodology used, and testing the significant
assumptions discussed above used by the Company in its analysis. We also compared the significant assumptions to
current industry, market and economic trends to corroborate the Company’s estimates and performed sensitivity analyses
of significant assumptions to evaluate the changes in the contingent consideration liability that would result from changes
in the significant assumptions.

/s/ Ernst & Young LLP

We have served as the Company's auditor since 2019.

Philadelphia, Pennsylvania

March 4, 2021

62

ARBUTUS BIOPHARMA CORPORATION

Consolidated Balance Sheets

(Expressed in thousands of US Dollars, except share and per share amounts)

Assets
Current assets:

Cash and cash equivalents
Investments in marketable securities, current
Accounts receivable
Prepaid expenses and other current assets

Total current assets
Property and equipment, net of accumulated depreciation
Right of use asset
Other non-current assets

Total assets
Liabilities and stockholders' equity
Current liabilities:

Accounts payable and accrued liabilities
Liability-classified options
Lease liability, current

Total current liabilities
Liability related to sale of future royalties
Contingent consideration
Lease liability, non-current
Total liabilities
Stockholders' equity
Preferred shares
Authorized: unlimited number without par value
Issued and outstanding: 1,164,000
Common shares

Authorized: unlimited number without par value
Issued and outstanding: 89,678,722 (December 31, 2019: 64,780,314)
Additional paid-in capital
Deficit
Accumulated other comprehensive loss
Total stockholders' equity

Total liabilities and stockholders' equity

December 31, 2020

December 31, 2019

$

$

$

$

52,251  $
71,017 
1,312 
3,124 
127,704 
6,927 
2,405 
44 
137,080  $

8,901  $
250 
390 
9,541 
19,554 
3,426 
2,593 
35,114 

31,799 
59,035 
1,204 
1,790 
93,828 
8,676 
2,738 
293 
105,535 

7,235 
253 
340 
7,828 
18,992 
2,953 
3,018 
32,791 

149,408 

137,285 

985,939 
60,751 
(1,045,961)
(48,171)
101,966 
137,080  $

898,535 
55,246 
(970,093)
(48,229)
72,744 
105,535 

See accompanying notes to the consolidated financial statements.

63

 
 
 
 
 
 
 
 
 
 
 
 
 
ARBUTUS BIOPHARMA CORPORATION

Consolidated Statements of Operations and Comprehensive Loss

(Expressed in thousands of US Dollars, except share and per share amounts)

Revenue

Collaborations and licenses
Non-cash royalty revenue

Total revenue
Operating expenses

Research and development
General and administrative
Depreciation
Change in fair value of contingent consideration
Site consolidation
Impairment of intangible assets
Impairment of goodwill
Arbitration

Total operating expenses
Loss from operations
Other income (loss)
Interest income
Interest expense
Equity investment loss
Foreign exchange gain (loss)

Total other loss
Loss before income taxes
Income tax benefit
Net loss
Items applicable to preferred shares

Dividend accretion of convertible preferred shares

Net loss attributable to common shares
Loss per share

Basic and diluted

Weighted average number of common shares

Basic and diluted

Comprehensive income (loss)

Unrealized gain on available-for-sale securities
Currency translation adjustments

Comprehensive loss

Year ended December 31,

2020

2019

$

$

$

$

$

$

$

3,519 
3,395 
6,914 

47,481 
14,724 
1,978 
473 
64 
— 
— 
— 
64,720 
(57,806)

741 
(4,011)
(2,545)
(124)
(5,939)
(63,745)
— 
(63,745)

(12,123)
(75,868)

(1.00)

75,835,378 

14 
44 
(63,687)

$

$

$

$

$

4,355 
1,656 
6,011 

57,601 
17,727 
2,028 
(173)
156 
43,836 
22,471 
6,266 
149,912 
(143,901)

2,111 
(2,108)
(22,522)
41 
(22,478)
(166,379)
12,656 
(153,723)

(11,149)
(164,872)

(2.89)

57,093,454 

— 
(59)
(153,782)

See accompanying notes to the consolidated financial statements.

64

 
 
 
 
 
 
 
 
 
 
 
 
ARBUTUS BIOPHARMA CORPORATION

Consolidated Statement of Stockholders’ Equity

(Expressed in thousands of US Dollars, except share and per share amounts)

Convertible Preferred Shares

Common Shares

Number of
shares
1,164,000 

Share
capital

$

126,136 

Number of
shares
55,518,800 

Share
capital

Additional
paid-in
capital

Deficit

$

879,405 

$

48,084 

$

(805,221)

Accumulated other
comprehensive loss
(48,170)
$

Total
stockholders'
equity

$

200,234 

— 
— 

— 

— 

— 
— 

11,149 
— 

— 

— 

— 
— 

1,164,000 

$

137,285 

12,123 

— 
— 

— 

— 
— 

— 

9,138,232 

18,601 

123,282 
— 
— 
64,780,314 

$

529 
— 
— 
898,535 

$

(11,149)
— 

— 

— 

— 
— 
(153,723)
(970,093)

(12,123)

$

— 
7,204 

180 

— 

(222)
— 
— 
55,246 

6,145 

18 

$

24,728,368 

86,297 

170,040 

1,107 

(658)

— 
1,164,000 

$

— 
149,408 

— 
89,678,722 

$

— 
985,939 

$

— 
60,751 

$

(63,745)
(1,045,961)

$

See accompanying notes to the consolidated financial statements.

— 
— 

— 

— 

— 
(59)
— 
(48,229)

$

14 
44 
— 
(48,171)

$

— 
7,204 

180 

18,601 

307 
(59)
(153,723)
72,744 

— 
6,145 

18 

86,297 

449 

14 
44 
(63,745)
101,966 

Balance at December 31, 2018
Accretion of accumulated dividends on
Preferred Shares
Stock-based compensation
Certain fair value adjustments to liability
stock option awards
Issuance of common shares pursuant to
the Open Market Sales Agreement
Issuance of common shares pursuant to
exercise of options
Currency translation adjustment
Net loss

Balance at December 31, 2019
Accretion of accumulated dividends on
Preferred Shares
Stock-based compensation
Certain fair value adjustments to liability
stock option awards
Issuance of common shares pursuant to
the Open Market Sales Agreement
Issuance of common shares pursuant to
exercise of options
Unrealized gain on available-for-sale
securities
Currency translation adjustment
Net loss

Balance at December 31, 2020

65

 
 
ARBUTUS BIOPHARMA CORPORATION

Consolidated Statements of Cash Flows

(Expressed in thousands of US Dollars, except share and per share amounts)

OPERATING ACTIVITIES

Net loss
Non-cash items:

Deferred income tax benefit
Depreciation
Loss on sale of property and equipment
Stock-based compensation expense
Unrealized foreign exchange gains
Change in fair value of contingent consideration
Impairment of intangible assets
Impairment of goodwill
Net equity investment loss
Non-cash royalty revenue
Non-cash interest expense
Net accretion and amortization of investments in marketable securities

Net change in operating items:

Accounts receivable
Prepaid expenses and other assets
Accounts payable and accrued liabilities
Lease liabilities

Net cash used in operating activities
INVESTING ACTIVITIES

Purchase of investments in marketable securities
Disposition of investments in marketable securities
Investment in Genevant
Proceeds from sale of property and equipment
Acquisition of property and equipment

Net cash provided by (used in) investing activities
FINANCING ACTIVITIES

Proceeds from sale of future royalties, net
Issuance of common shares pursuant to exercise of options
Issuance of common shares pursuant to the Open Market Sales Agreement

Net cash provided by financing activities
Effect of foreign exchange rate changes on cash and cash equivalents
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period
Supplemental cash flow information
Preferred shares dividends accrued

Year ended December 31,

2020

2019

$

(63,745) $

(153,723)

— 
1,978 
— 
6,161 
(56)
473 
— 
— 
2,545 
(3,395)
3,957 
210 

(108)
(752)
1,666 
(375)
(51,441)

(85,578)
73,398 
(2,500)
— 
(229)
(14,909)

— 
449 
86,297 
86,746 
56 
20,452  $
31,799  $
52,251  $

(12,661)
2,028 
20 
6,799 
(68)
(173)
43,836 
22,471 
22,522 
(1,656)
2,099 
(275)

227 
1,606 
(3,314)
(744)
(71,006)

(58,759)
87,675 
— 
11 
(589)
28,338 

18,549 
307 
18,601 
37,457 
68 
(5,143)
36,942 
31,799 

(12,123) $

(11,149)

$
$
$

$

 See accompanying notes to the consolidated financial statements.

66

 
 
 
 
 
 
 
 
 
 
ARBUTUS BIOPHARMA CORPORATION

Notes to Consolidated Financial Statements

(Tabular amounts in thousands of US Dollars, except share and per share amounts) 

1.    Organization

Description of the Business

Arbutus Biopharma Corporation (the “Company” or “Arbutus”) is a clinical-stage, biopharmaceutical company primarily focused on developing a cure for
people with chronic hepatitis B virus (“HBV”) infection. The Company is advancing multiple product candidates with distinct mechanisms of action that it
believes  have  the  potential  to  provide  a  new  curative  regimen  for  chronic  HBV  infection.  The  Company  has  also  initiated  a  drug  discovery  and
development effort for treating coronaviruses, including COVID-19.

The  Company’s  two  lead  product  candidates  are  AB-729,  the  Company’s  proprietary  subcutaneously-delivered  RNA  interference  (“RNAi”)  product
candidate  that  suppresses  HBsAg  expression,  and  AB-836,  the  Company’s  proprietary  next-generation  oral  capsid  inhibitor  that  suppresses  HBV  DNA
replication. AB-729 is currently in an ongoing Phase 1a/1b clinical trial and the Company expects AB-836 to progress into a Phase 1a/1b clinical trial in
the first half of 2021.

Liquidity

At December 31, 2020, the Company had an aggregate of $123.3 million in cash, cash equivalents and investments in marketable securities. From January
1, 2021 through March 3, 2021, the Company received an additional $24.3 million of net proceeds from the issuance of common shares under the ATM
program. The Company believes that its cash resources will be sufficient to fund its operations through the third quarter of 2022.

The success of the Company is dependent on obtaining the necessary regulatory approvals to bring its products to market and achieve profitable operations.
The  Company’s  research  and  development  activities  and  commercialization  of  its  products  are  dependent  on  its  ability  to  successfully  complete  these
activities and to obtain adequate financing through a combination of financing activities and operations. It is not possible to predict either the outcome of
the Company’s existing or future research and development programs or the Company’s ability to continue to fund these programs in the future.

COVID-19 Impact

In December 2019, an outbreak of a novel strain of coronavirus (COVID-19) was identified in Wuhan, China. This virus continues to spread globally, has
been declared a pandemic by the World Health Organization and has spread to nearly every country in the world. The impact of this pandemic has been,
and will likely continue to be, extensive in many aspects of society. The pandemic has resulted in and will likely continue to result in significant disruptions
to businesses. A number of countries and other jurisdictions around the world have implemented extreme measures to try and slow the spread of the virus.
These measures include the closing of businesses and requiring people to stay in their homes, the latter of which raises uncertainty regarding the ability to
travel to hospitals in order to participate in clinical trials. Additional measures that have had, and will likely continue to have, a major impact on clinical
development, at least in the near-term, include shortages and delays in the supply chain, and prohibitions in certain countries on enrolling subjects in new
clinical  trials.  Future  disruptions  related  to  the  COVID-19  pandemic  could  negatively  impact  the  Company’s  plans  and  timelines  in  2021  and  beyond,
including enrolling and monitoring subjects in its clinical trials.

67

 
2.    Significant accounting policies 

Basis of presentation and principles of consolidation

These consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and include the
accounts of Arbutus Biopharma Corporation and its two wholly-owned subsidiaries, Arbutus Biopharma, Inc. and Arbutus Biopharma U.S. Holdings, Inc.
All  intercompany  balances  and  transactions  have  been  eliminated.  Certain  prior  year  amounts  have  been  reclassified  to  conform  to  the  current  year
presentation. In February 2021, Arbutus Biopharma US Holdings, Inc merged into Arbutus Biopharma, Inc. with Arbutus Biopharma, Inc. continuing its
legal existence and Arbutus Biopharma US Holdings, Inc ceasing to exist.

Use of estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions about future
events that affect the reported amounts of assets, liabilities, revenue, expenses and contingent liabilities as of the end or during the reporting period. Actual
results  could  significantly  differ  from  those  estimates.  Significant  estimates  in  the  accompanying  consolidated  financial  statements  impact  contingent
consideration, income tax recoveries, stock-based compensation, clinical trial accruals and the sale of future royalties liability.

Cash and cash equivalents

Cash and cash equivalents are all highly liquid instruments with an original maturity of three months or less when purchased. Cash equivalents are recorded
at cost plus accrued interest. The carrying value of these cash equivalents approximates their fair value.

Investments in marketable securities

The Company’s short-term investments consist of marketable securities that have original maturities exceeding three months and remaining maturities of
less than one year. The Company classifies investments with remaining maturities of one year or longer as non-current. These investments are accounted
for  as  available-for-sale  securities  and  are  reported  at  fair  value,  with  unrealized  gains  and  losses  reported  in  other  comprehensive  loss,  until  their
disposition.  Realized  gains  and  losses  from  the  sale  of  marketable  securities,  if  any,  are  calculated  using  the  specific-identification  method,  and  are
recorded as a component of other income or loss. The Company reviews its available-for-sale securities at each period end to determine if they remain
available-for-sale based on the Company’s current intent and ability to sell the security if it is required to do so. Declines in value judged to be other-than-
temporary are included in interest income or expense in the Company’s statements of operations and comprehensive loss. As of December 31, 2020, the
recorded value of the Company’s investments in marketable securities was deemed to be recoverable in all respects.

All investments are governed by the Company’s Investment Policy approved by the Company’s board of directors.

Foreign currency translation and functional currency conversion

The Company’s functional currency is the United States dollar. Monetary assets and liabilities denominated in foreign currencies are translated into United
States dollars using exchange rates in effect at the balance sheet date. Opening balances related to non-monetary assets and liabilities are based on prior
period translated amounts, and non-monetary assets and non-monetary liabilities are translated at the approximate exchange rate prevailing at the date of
the transaction. Revenue and expense transactions are translated at the approximate exchange rate in effect at the time of the transaction. Foreign exchange
gains and losses are included in the statement of operations and comprehensive loss as foreign exchange gains.

68

Investment in Genevant

As  the  result  of  a  recapitalization  of  Genevant  Sciences  Ltd.  (“Genevant”)  in  July  2020,  Arbutus’  ownership  interest  in  Genevant  decreased  to
approximately 16%. Due to Arbutus’ loss of significant influence with respect to Genevant as a result of the recapitalization, Arbutus discontinued the use
of  the  equity  method  of  accounting  for  its  interest  in  Genevant.  Ownership  interests  that  do  not  confer  the  ability  to  exercise  significant  influence  are
accounted for at fair value, except when the investment does not have a readily-determinable fair value. In that case, the investment is carried at cost, less
any impairment. The carrying value is subsequently adjusted to fair value based on any observable price changes. Following the recapitalization, Arbutus
accounts for its interest in Genevant as equity securities without readily determinable fair values. Accordingly, an estimate of the fair value of the securities
is  based  on  the  original  cost  less  previously  recognized  equity  method  losses,  less  impairments,  plus  or  minus  changes  resulting  from  observable  price
changes  in  orderly  transactions  for  identical  or  a  similar  Genevant  securities.  As  of  December  31,  2020,  the  carrying  value  of  Arbutus’  investment  in
Genevant was zero and Arbutus owned approximately 16% of the common equity of Genevant.

See note 5 for more information.

Property and equipment

Property and equipment is recorded at cost less impairment losses and accumulated depreciation. The Company records depreciation using the straight-line
method over the estimated useful lives of the capital assets as follows:

Laboratory equipment
Computer and office equipment
Furniture and fixtures

Useful Life (Years)
5
to
5

5

2

Leasehold  improvements  are  depreciated  over  their  estimated  useful  lives  but  in  no  case  longer  than  the  lease  term,  except  where  lease  renewal  is
reasonably assured.

Property and equipment is reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not
be recoverable. If such a review should indicate that the carrying amount of long-lived assets is not recoverable, then such assets are written down to their
fair values.

Revenue recognition

ASC 606, Revenue From Contracts with Customers (“ASC 606”) requires an entity to recognize the amount of revenue to which it expects to be entitled
for the transfer of promised goods or services to customers under a five-step model: (i) identify contract(s) with a customer; (ii) identify the performance
obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v)
recognize revenue when or as a performance obligation is satisfied.

The Company generates revenue primarily through collaboration agreements and license agreements. Such agreements may require the Company to deliver
various  rights  and/or  services,  including  intellectual  property  rights  or  licenses  and  research  and  development  services.  Under  such  agreements,  the
Company  is  generally  eligible  to  receive  non-refundable  upfront  payments,  funding  for  research  and  development  services,  milestone  payments,  and
royalties.

In contracts where the Company has more than one performance obligation to provide its customer with goods or services, each performance obligation is
evaluated to determine whether it is distinct based on whether (i) the customer can benefit from the good or service either on its own or together with other
resources that are readily available and (ii) the good or service is separately identifiable from other promises in the contract. The consideration under the
contract is then allocated between the distinct performance obligations based on their respective relative stand-alone selling prices. The estimated stand-
alone selling price of each deliverable reflects the Company’s best estimate of what the selling price would be if the deliverable was

69

 
 
regularly sold on a stand-alone basis and is determined by reference to market rates for the good or service when sold to others or by using an adjusted
market assessment approach if the selling price on a stand-alone basis is not available.

The consideration allocated to each distinct performance obligation is recognized as revenue when control is transferred to the customer for the related
goods  or  services.  Consideration  associated  with  at-risk  substantive  performance  milestones,  including  sales-based  milestones,  is  recognized  as  revenue
when  it  is  probable  that  a  significant  reversal  of  the  cumulative  revenue  recognized  will  not  occur.  Sales-based  royalties  received  in  connection  with
licenses of intellectual property are subject to a specific exception in the revenue standards, whereby the consideration is not included in the transaction
price and recognized in revenue until the customer’s subsequent sales or usages occur.

Leases

As of January 1, 2019, the Company adopted FASB’s Accounting Standards Update 2016-02, Leases (ASC 842), which generally requires the recognition
of operating and financing lease liabilities with corresponding right-of-use assets on the balance sheet. The Company adopted the new standard using the
modified retrospective basis applied at the effective date of the new standard and elected to utilize a package of practical expedients. See note 6 for more
information.

Research and development costs

Research and development costs include compensation and benefits for research and development employees, an allocation of overhead expenses and costs
associated with materials and supplies used in clinical trials and research and development, outside contracted services including clinical and pre-clinical
study  costs,  legal,  regulatory  compliance  and  fees  paid  to  consultants  or  outside  parties  for  research  and  development  activities  performed  on  the
Company’s behalf. Such costs are charged to expense in the period in which they are incurred.

Research and development costs that are paid in advance of performance or receipt are recorded as prepaid expense and are amortized over the period that
the services are performed.

Net loss attributable to common shareholders per share

The Company follows the two-class method when computing net loss attributable to common shareholders per share as the Company has issued Series A
participating  convertible  preferred  shares  (“Preferred  Shares”),  as  further  described  in  note  13,  that  meet  the  definition  of  participating  securities.  The
Company’s  Preferred  Shares  entitle  the  holders  to  participate  in  dividends  but  do  not  require  the  holders  to  participate  in  losses  of  the  Company.
Accordingly,  if  the  Company  reports  a  net  loss  attributable  to  holders  of  the  Company’s  common  shares,  net  losses  are  not  allocated  to  holders  of  the
Preferred Shares.

Net loss attributable to common shareholders per share is calculated based on the weighted average number of common shares outstanding. Diluted net loss
attributable  to  common  shareholders  per  share  does  not  differ  from  basic  net  loss  attributable  to  common  shareholders  per  share  for  the  years  ended
December  31,  2020  and  2019,  since  the  effect  of  the  Company’s  stock  options  and  convertible  preferred  stock  is  anti-dilutive.  For  the  year  ended
December  31,  2020,  potential  common  shares  of  10.7  million  pertaining  to  stock  options  outstanding  and  approximately  21.1  million  pertaining  to  if-
converted  preferred  shares  for  a  total  of  approximately  31.8  million  shares  were  excluded  from  the  calculation  of  net  loss  attributable  to  common
shareholders,  per  share  because  their  inclusion  would  be  anti-dilutive.  A  total  of  approximately  28.4  million  potential  common  shares  and  if-converted
preferred shares were excluded from the calculation for the year ended December 31, 2019.

70

  
 
The following table sets out the computation of basic and diluted net loss attributable to common shareholders per share:

Numerator:
Allocation of distributable earnings
Allocation of undistributable loss
Allocation of net loss attributed to common shareholders
Denominator:
Weighted average number of common shares - basic and diluted
Basic and diluted net loss attributable to common shareholders per share

See note 13 and note 14 for more information about the Company’s common shares.

Deferred income taxes

For the year ended December 31,

2020

2019

(in thousands, except share and per share amounts)

$

$

$

—  $

(75,868)
(75,868) $

75,835,378 

(1.00) $

— 
(164,872)
(164,872)

57,093,454 
(2.89)

Income  taxes  are  accounted  for  using  the  asset  and  liability  method  of  accounting.  Deferred  income  taxes  are  recognized  for  the  future  income  tax
consequences  attributable  to  differences  between  the  carrying  values  of  assets  and  liabilities  and  their  respective  income  tax  bases  and  for  loss  carry-
forwards.  Deferred  income  tax  assets  and  liabilities  are  measured  using  enacted  income  tax  rates  expected  to  apply  to  taxable  income  in  the  periods  in
which temporary differences are expected to be recovered or settled. The effect on deferred income tax assets and liabilities of a change in tax laws or rates
is included in earnings in the period that includes the enactment date. When realization of deferred income tax assets does not meet the more-likely-than-
not criterion for recognition, a valuation allowance is provided.

Stock-based compensation

We measure and recognize compensation expense for all share-based compensation arrangements based on estimated fair values. We use the Black-Scholes
option  valuation  model  to  estimate  the  fair  value  of  stock  options  at  the  date  of  grant.  The  Black-Scholes  option  valuation  model  requires  the  input  of
subjective assumptions to calculate the value of stock options. For those assumptions, we use historical data and other information to estimate the expected
price volatility and risk free interest rate for all awards. The expected life of stock options granted are estimated to be five years for employees and seven
years for directors and executives, based on our historical experience. Assumptions on the dividend yield are based on the fact that the Company has never
paid cash dividends and has no present intention to pay cash dividends. Expense is recognized over the vesting period for all awards and commences at the
grant date for time-based awards and upon the Company’s determination that the achievement of such performance conditions is probable for performance-
based awards. Forfeitures are recognized as they occur.

For the Company’s Employee Stock Purchase Plan, the fair value of the right to acquire stock at a discounted price under the plan is calculated using the
Black-Scholes valuation model. Expense is recognized over the period the employee contributes to the plan through payroll deductions.

The  Company  accounts  for  liability-classified  stock  option  awards  (“liability  options”)  under  ASC  718  -  Compensation  -  Stock  Compensation  (“ASC
718”),  under  which  awards  of  options  that  provide  for  an  exercise  price  that  is  not  denominated  in:  (a)  the  currency  of  a  market  in  which  a  substantial
portion of the Company’s equity securities trades, (b) the currency in which the employee’s pay is denominated, or (c) the Company’s functional currency,
are required to be classified as liabilities. As of January 1, 2016, the Company changed its functional currency to US dollars, which resulted in certain stock
option awards with exercise prices denominated in Canadian dollars having an exercise price that is not denominated in the Company’s functional currency.
As  such,  the  historic  equity  classification  of  these  stock  option  awards  changed  to  liability  classification  effective  January  1,  2016.  The  change  in
classification resulted in reclassification of these awards from additional paid-in capital to a liability.

71

 
 
 
 
 
 
Liability options are re-measured to their fair values at each reporting date with changes in the fair value recognized in share-based compensation expense
or additional paid-in capital until settlement or cancellation. Under ASC 718, when an award is reclassified from equity to liability, if at the reclassification
date the original vesting conditions are expected to be satisfied, then the minimum amount of compensation cost to be recognized is based on the grant date
fair value of the original award. Fair value changes below this minimum amount are recorded in additional paid-in capital.

Preferred Shares

The Company accounts for Preferred Shares under ASC 480 – Distinguishing Liabilities from Equity  (“ASC  480”),  which  provides  guidance  for  equity
instruments with conversion features. The Company classifies Preferred Shares in its consolidated balance sheet wholly as equity, with no bifurcation of
conversion  feature  from  the  host  contract,  given  that  the  Preferred  Shares  cannot  be  cash-settled  and  the  redemption  features,  which  include  a  fixed
conversion ratio with predetermined timing and proceeds, are within the Company’s control. The Company accrues for the 8.75% per annum compounding
accrual at each reporting period end date as an increase to share capital, and an increase to deficit.

Segment information

The Company operates in a single reporting segment. Substantially all of the Company’s revenues to date were earned from customers or collaborators
based in the United States. Substantially all of the Company’s premises, property and equipment are located in the United States.

Comprehensive loss

Comprehensive loss is comprised of net loss, the impact of foreign currency translation adjustments and adjustments for the change in unrealized gains and
losses  on  investments  in  available-for-sale  marketable  securities.  The  Company  displays  comprehensive  loss  and  its  components  in  the  consolidated
statements of operations and comprehensive loss, net of tax effects if any.

Concentrations of Credit Risk

Financial  instruments  which  potentially  subject  the  Company  to  credit  risk  consist  primarily  of  cash,  cash  equivalents  and  marketable  securities.  The
Company holds these investments in highly rated financial institutions, and, by policy, limits the amounts of credit exposure to any one financial institution.
These amounts at times may exceed federally insured limits. The Company has not experienced any credit losses in such accounts and does not believe it is
exposed  to  any  significant  credit  risk  on  these  funds.  The  Company  has  no  off-balance  sheet  concentrations  of  credit  risk,  such  as  foreign  currency
exchange contracts, option contracts or other hedging arrangements.

Recent accounting pronouncements

In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments -
Credit Losses: Measurement of Credit Losses on Financial Instruments (ASC 326). The guidance is effective for the Company beginning January 1, 2023
and  it  changes  how  entities  account  for  credit  losses  on  financial  assets  and  other  instruments  that  are  not  measured  at  fair  value  through  net  income,
including available-for-sale debt securities. The Company is currently evaluating the impact of the new standard on its consolidated financial statements.

3.    Fair value measurements 

The Company measures certain financial instruments and other items at fair value.

To determine the fair value, the Company uses the fair value hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs
and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market
participants would use to value an asset or liability and are developed based on market data obtained from independent sources. Unobservable inputs are
inputs based on assumptions about the

72

factors market participants would use to value an asset or liability. The three levels of inputs that may be used to measure fair value are as follows:

•

•

•

Level 1 inputs are quoted market prices for identical instruments available in active markets.

Level  2  inputs  are  inputs  other  than  quoted  prices  included  within  Level  1  that  are  observable  for  the  asset  or  liability  either  directly  or
indirectly. If the asset or liability has a contractual term, the input must be observable for substantially the full term. An example includes
quoted market prices for similar assets or liabilities in active markets.

Level  3  inputs  are  unobservable  inputs  for  the  asset  or  liability  and  will  reflect  management’s  assumptions  about  market  assumptions  that
would be used to price the asset or liability.

Assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurements. Changes in the observability of
valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy.

The carrying values of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their fair values due to the
immediate or short-term maturity of these financial instruments.

To determine the fair value of the contingent consideration (note 11), the Company uses a probability weighted assessment of the likelihood the milestones
would  be  met  and  the  estimated  timing  of  such  payments,  and  then  the  potential  contingent  payments  were  discounted  to  their  present  value  using  a
probability adjusted discount rate that reflects the early stage nature of the development program, time to complete the program development, and overall
biotech indices. The Company determined the fair value of the contingent consideration was $3.4 million as of December 31, 2020 and the increase of $0.5
million has been recorded within operating expenses in the statement of operations and comprehensive loss for the year ended December 31, 2020. The
assumptions  used  in  the  discounted  cash  flow  model  are  level  3  inputs  as  defined  above.  The  Company  assessed  the  sensitivity  of  the  fair  value
measurement to changes in these unobservable inputs, and determined that changes within a reasonable range would not result in a materially different
assessment of fair value.  

The following tables present information about the Company’s assets and liabilities that are measured at fair value on a recurring basis, and indicates the
fair value hierarchy of the valuation techniques used to determine such fair value:

As of December 31, 2020
Assets
Cash and cash equivalents
Investments in marketable securities

Total
Liabilities
Liability-classified options
Contingent consideration

Total

Level 1

Level 2

Level 3

Total

$

$

$

$

52,251  $
71,017 
123,268  $

—  $
— 
—  $

(in thousands)

—  $
— 
—  $

—  $
— 
—  $

—  $
— 
—  $

250  $

3,426 
3,676  $

52,251 
71,017 
123,268 

250 
3,426 
3,676 

73

 
 
As of December 31, 2019
Assets
Cash and cash equivalents
Investments in marketable securities

Total
Liabilities
Liability-classified options
Contingent consideration

Total

Level 1

Level 2

Level 3

Total

$

$

$

$

31,799  $
59,035 
90,834  $

—  $
— 
—  $

(in thousands)

—  $
— 
—  $

—  $
— 
—  $

—  $
— 
—  $

253  $

2,953 
3,206  $

31,799 
59,035 
90,834 

253 
2,953 
3,206 

The following table presents the changes in fair value of the Company’s liability-classified stock option awards:

Year ended December 31, 2020
Year ended December 31, 2019

$
$

253  $
479  $

(in thousands)
—  $
—  $

(3) $
(226) $

250 
253 

Liability at beginning of
the period

Fair value of liability-classified
options exercised in the period

Increase (decrease) in fair
value of liability

Liability at end of the
period

The following table presents the changes in fair value of the Company’s contingent consideration:

Year ended December 31, 2020
Year ended December 31, 2019

$
$

2,953  $
3,126  $

473  $
(173) $

3,426 
2,953 

Liability at beginning of the period

Increase (decrease) in fair value of
liability
(in thousands)

Liability at end of the period

74

  
 
4.    Investments in marketable securities 

Investments in marketable securities consisted of the following:

As of December 31, 2020
Cash equivalents

Money market fund
US government agency bonds
US treasury bills
Total

Investments in marketable securities
US government agency bonds
US treasury bills
US government bonds
Total

(1) 
  Gross unrealized gain (loss) is pre-tax.

As of December 31, 2019
Cash equivalents

Money market fund
US government agency bonds
US treasury bills

Total

Investments in marketable securities
Us government agency bonds
US treasury bills
US government bonds
Total

$

$

$

$

$

$

$

$

Amortized Cost

Gross Unrealized Gain

(1)

Gross Unrealized Loss

(1)

Fair Value

13,703  $
— 
2,000 
15,703  $

11,550  $
21,990 
37,463 
71,003  $

(in thousands)

—  $
— 
— 
—  $

7  $
2 
6 
15  $

—  $
— 
— 
—  $

—  $
— 
(1)
(1) $

Amortized Cost

Gross Unrealized Gain

(1)

Gross Unrealized Loss

(1)

Fair Value

4,106  $
1,511 
1,499 
7,116  $

19,863  $
15,926 
23,246 
59,035  $

(in thousands)

—  $
— 
— 
—  $

2  $
2 
— 

4  $

—  $
— 
— 
—  $

(1) $
(1)
(2)
(4) $

13,703 
— 
2,000 
15,703 

11,557 
21,992 
37,468 
71,017 

4,106 
1,511 
1,499 
7,116 

19,864 
15,927 
23,244 
59,035 

(1) 

Gross unrealized gain (loss) is pre-tax.

There were no realized gains or losses for the year ended December 31, 2020 or 2019.

5.    Investment in Genevant

In April 2018, the Company entered into an agreement with Roivant Sciences Ltd. (“Roivant”), its largest shareholder, to launch Genevant Sciences Ltd.
(“Genevant”),  a  company  focused  on  the  discovery,  development,  and  commercialization  of  a  broad  range  of  RNA-based  therapeutics  enabled  by  the
Company’s lipid nanoparticle (“LNP”) and ligand conjugate delivery technologies. The Company licensed exclusive rights to its LNP and ligand conjugate
delivery platforms to Genevant for RNA-based applications outside of HBV, except to the extent certain rights had already been licensed to other third
parties (the “Genevant License”). The Company retained all rights to its LNP and conjugate delivery platforms for HBV. Under the Genevant License, the
Company  is  entitled  to  receive  tiered  low  single-digit  royalties  on  future  sales  of  Genevant  products  covered  by  the  licensed  patents.  If  Genevant  sub-
licenses  the  intellectual  property  licensed  by  the  Company  to  Genevant,  the  Company  is  entitled  to  receive  under  the  Genevant  License,  upon  the
commercialization of a product developed by such sub-licensee, the lesser of (i) twenty percent of the revenue received by Genevant for such sublicensing
and (ii) tiered low single-digit royalties on product sales by the sublicensee.

75

 
On July 23, 2020, the United States Patent and Trademark Office before the Patent Trial and Appeal Board ("PTAB") announced its decision in Moderna
Therapeutics,  Inc.'s  (“Moderna”)  challenge  of  the  validity  of  U.S.  Patent  8,058,069  ("the  ‘069  Patent").  In  this  decision,  the  PTAB  determined  no
challenged  claims  were  unpatentable.  On  September  23,  2020,  Moderna  appealed  the  ‘069  Patent  decision  to  the  Federal  Circuit  Court  of  Appeals.
Moderna filed its opening brief in that appeal on February 23, 2021, and the Company’s responsive brief is due on May 4, 2021. While the Company is the
patent holder, this patent has been licensed to Genevant. The ‘069 Patent was included in the exclusive rights licensed by the Company to Genevant under
the Genevant License.

On July 31, 2020, Roivant recapitalized Genevant through an equity investment and conversion of previously issued convertible debt securities held by
Roivant. The Company participated in the recapitalization of Genevant with an investment of $2.5 million. The Company determined that this $2.5 million
additional investment in Genevant represented the funding of prior losses and accordingly, the Company recorded the amount as an equity investment loss
on the Condensed Consolidated Statements of Operations and Comprehensive Loss in 2020.

Following  the  recapitalization,  the  Company  owned  approximately  16%  of  the  common  equity  of  Genevant.  In  connection  with  the  recapitalization,
Genevant,  the  Company  and  Roivant  entered  into  an  Amended  and  Restated  Shareholders  Agreement  that  provides  Roivant  with  substantial  control  of
Genevant. The Company has a non-voting observer seat on Genevant’s Board of Directors. Due to the Company’s loss of significant influence with respect
to Genevant as a result of the recapitalization, the Company discontinued the use of the equity method of accounting for its interest in Genevant. Following
the  recapitalization,  the  Company  accounts  for  its  interest  in  Genevant  as  equity  securities  without  readily  determinable  fair  values.  Accordingly,  an
estimate of the fair value of the securities is based on the original cost less previously recognized equity method losses, less impairments, plus or minus
changes  resulting  from  observable  price  changes  in  orderly  transactions  for  identical  or  a  similar  Genevant  securities.  The  Company’s  entitlement  to
receive future royalties or sublicensing revenue under the Genevant License was not impacted by the recapitalization.

As  of  December  31,  2020,  the  carrying  value  of  the  Company’s  investment  in  Genevant  was  zero  and  the  Company  owned  approximately  16%  of  the
common  equity  of  Genevant.  During  2019,  the  Company  recorded  non-cash  equity  losses  of  $22.5  million  related  to  Genevant.  Equity losses for 2019
included  $14.9  million  of  losses  for  the  Company’s  proportionate  share  of  Genevant’s  net  losses  and  a  $7.6  million  impairment  charge  to  reduce  the
carrying  value  of  the  Company’s  investment  in  Genevant  to  zero.  The  impairment  was  due  to  uncertainty  surrounding  the  recovery  of  the  Company’s
remaining carrying value in Genevant.

6.    Leases

The  Company  has  two  operating  leases  for  office  and  laboratory  space.  The  Company’s  corporate  headquarters  is  located  at  701  Veterans  Circle,
Warminster, Pennsylvania. The lease expires on April 30, 2027, and the Company has the option of extending the lease for two further five-year terms. The
Company  also  leases  office  space  located  at  626  Jacksonville  Rd,  Warminster,  Pennsylvania  under  a  lease  that  expires  on  December  31,  2021,  and  the
Company has an option to extend the lease term to April 30, 2027. In connection with the Company’s site consolidation in 2018, the Company ceased using
its office and laboratory space located in Burnaby, British Columbia, Canada on June 30, 2018. The Company subleased a portion of the Burnaby facility to
various  tenants,  including  Genevant,  until  the  lease  expired  on  July  31,  2019.  The  Company  recognized  the  remaining  lease  payments  for  the  Burnaby
facility, less sublease income under contract, in site consolidation expenses in 2018.

The Company adopted ASU No. 2016-02, Leases (Topic 842) on January 1, 2019 using the modified retrospective basis applied at the effective date of the
new standard and elected to utilize a package of practical expedients. Leases with an initial term of 12 months or less are not recorded on the balance sheet.
The Company determines if an arrangement is a lease at inception. Right-of-use assets represent the Company’s right to use an underlying asset for the
lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease right-of-use assets and
lease  liabilities  are  recognized  based  on  the  present  value  of  lease  payments  over  the  lease  term.  The  leases  do  not  provide  an  implicit  rate  so  in
determining the present value of lease payments, the Company utilized its incremental borrowing rate for the

76

applicable lease, which was 9.0% for the 701 Veterans Circle lease, 7.6% for the 626 Jacksonville Rd. lease and 5.0% for the Burnaby lease. The Company
recognizes lease expense on a straight-line basis over the remaining lease term.
During the year ended December 31, 2020, the Company incurred total operating lease expenses of $0.7 million, which included lease expenses associated
with fixed lease payments of $0.6 million, and variable payments associated with common area maintenance and similar expenses of $0.1 million. For the
twelve months ended December 31, 2019, the Company incurred total operating lease expense of $1.2 million, which included fixed lease payments of $0.9
million, and variable payments of $0.3 million. Sublease income for the Company’s Burnaby site, which closed during that year, was $0.2 million for the
twelve months ended December 31, 2019.

Weighted average remaining lease term and discount rate were as follows:

Weighted-average remaining lease term (years)
Weighted average discount rate

The Company did not include options to extend its lease terms as part of its ROU asset and lease liabilities.

Supplemental cash flow information related to the Company’s operating leases was as follows:

As of December 31, 2020
6.1
9.0%

Cash paid for amounts included in the measurement of lease liabilities

$

2020

2019

(in thousands)
657  $

1,116 

Future minimum lease payments under operating leases that have remaining terms as of December 31, 2020 are as follows:

2021
2022
2023
2024
2025
Thereafter

Total lease payments

Less: interest

Present value of lease payments

77

As of December 31, 2020
(in thousands)

677 
581 
598 
616 
635 
787 
3,894 
(911)
2,983 

$

$

$

7.    Property and equipment

The Company’s property and equipment balances as of the years ended December 31, 2020 and 2019 are as follows:

December 31, 2020
Lab equipment
Leasehold improvements
Computer hardware and software

December 31, 2019
Lab equipment
Leasehold improvements
Computer hardware and software

Cost

Cost

$

$

$

$

Accumulated
depreciation
(in thousands)

Net book value

5,669  $
8,555 
324 
14,548  $

(4,369) $
(3,017)
(235)
(7,621) $

1,300 
5,538 
89 
6,927 

Accumulated
depreciation
(in thousands)

Net book value

5,511  $
8,521 
286 
14,318  $

(3,316) $
(2,152)
(174)
(5,642) $

2,195 
6,369 
112 
8,676 

During 2019, the Company closed its Burnaby facility and the lease expired according to its terms on July 31, 2019. In connection with the facility closure,
the  Company  disposed  of  $3.4  million  of  equipment,  furniture  and  leasehold  improvements.  Most  of  the  disposed  assets  were  fully  depreciated.  The
aggregate net book value of the disposed assets was less than $0.1 million.

8.    Intangible assets and goodwill

All IPR&D intangible asset balance related to the Company’s cccDNA program. During 2019, the Company recorded a $43.8 million non-cash impairment
expense to reduce the carrying value of its IPR&D intangible assets to zero. The Company also recognized a corresponding income tax benefit of $12.7
million related to the decrease in its deferred tax liability related to the IPR&D intangible assets. The impairment was due to a decision to delay indefinitely
the further development of the Company’s cccDNA program while the Company focuses on its other development programs.

The Company’s goodwill balance represented the excess of purchase price over the value assigned to the net tangible and identifiable intangible assets in
connection with the business combination that formed Arbutus. During 2019, the Company assessed its changes in circumstances to determine if it was
more likely than not that the fair value of its single reporting unit was below its carrying amount. Due to a sustained decrease in the Company’s share price
during that time frame, the Company’s market capitalization was reduced below the book value of its net assets and the Company concluded that the fair
value of its single reporting unit was below its carrying amount in excess of the carrying value of goodwill. As a result, the Company recorded a $22.5
million non-cash impairment expense to reduce the carrying value of its goodwill asset to zero in 2019.

78

 
 
9.    Accounts payable and accrued liabilities

Accounts payable and accrued liabilities are comprised of the following:

Trade accounts payable
Payroll accruals
Research and development accruals
Professional fee accruals
Site consolidation accrual
Other accrued liabilities

Total

10.    Sale of future royalties

December 31, 2020

December 31, 2019

(in thousands)

$

$

2,994  $
3,566 
1,653 
679 
— 
9 
8,901  $

2,398 
2,314 
1,433 
809 
137 
144 
7,235 

On July 2, 2019, the Company entered into a Purchase and Sale Agreement (the “Agreement”) with the Ontario Municipal Employees Retirement System
(“OMERS”), pursuant to which the Company sold to OMERS part of its royalty interest on future global net sales of ONPATTRO, an RNA interference
therapeutic currently being sold by Alnylam.

ONPATTRO utilizes Arbutus’s LNP technology, which was licensed to Alnylam pursuant to the Cross-License Agreement, dated November 12, 2012, by
and  between  the  Company  and  Alnylam  (the  “LNP  License  Agreement”).  Under  the  terms  of  the  LNP  License  Agreement,  the  Company  is  entitled  to
tiered royalty payments on global net sales of ONPATTRO ranging from 1.00% to 2.33% after offsets, with the highest tier applicable to annual net sales
above  $500  million.  This  royalty  interest  was  sold  to  OMERS,  effective  as  of  January  1,  2019,  for  $20  million  in  gross  proceeds  before  advisory  fees.
OMERS will retain this entitlement until it has received $30 million in royalties, at which point 100% of such royalty interest on future global net sales of
ONPATTRO  will  revert  to  the  Company.  OMERS  has  assumed  the  risk  of  collecting  up  to  $30  million  of  future  royalty  payments  from  Alnylam  and
Arbutus is not obligated to reimburse OMERS if they fail to collect any such future royalties.

The $30 million in royalties to be paid to OMERS is accounted for as a liability, with the difference between the liability and the gross proceeds received
accounted for as a discount. The discount, as well as $1.5 million of transaction costs, will be amortized as interest expense based on the projected balance
of the liability as of the beginning of each period. Management estimated an effective annual interest rate of approximately 16%. Over the course of the
Agreement, the actual interest rate will be affected by the amount and timing of royalty revenue recognized and changes in the timing of forecasted royalty
revenue. On a quarterly basis, the Company will reassess the expected timing of the royalty revenue, recalculate the amortization and effective interest rate
and adjust the accounting prospectively as needed.

The  Company  recognizes  non-cash  royalty  revenue  related  to  the  sales  of  ONPATTRO  during  the  term  of  the  Agreement.  As  royalties  are  remitted  to
OMERS from Alnylam, the balance of the recognized liability is effectively repaid over the life of the Agreement. From the inception of the royalty sale
through December 31, 2020, the Company has recorded an aggregate of $5.1 million of non-cash royalty revenue for royalties earned by OMERS. There
are a number of factors that could materially affect the amount and timing of royalty payments from Alnylam, none of which are within the Company’s
control.

During the year ended December 31, 2020, the Company recognized non-cash royalty revenue of $3.4 million and $4.0 million of related non-cash interest
expense.  During  the  year  ended  December  31,  2019,  the  Company  recognized  non-cash  royalty  revenue  of  $1.7  million  and  related  non-cash  interest
expense of $2.1 million.

79

 
 
 
The table below shows the activity related to the net liability for the years ended December 31, 2020 and December 31, 2019:

Net liability related to sale of future royalties - beginning balance
Initial recognition of liability
Debt discount and issuance costs
Non-cash royalty revenue
Non-cash interest expense
Net liability related to sale of future royalties - ending balance

Twelve Months Ended December 31,

2020

2019

(in thousands)

18,992  $
— 
— 
(3,395)
3,957 
19,554  $

— 
30,000 
(11,451)
(1,656)
2,099 
18,992 

$

$

In addition to the royalty from the Alnylam LNP License Agreement, the Company is also receiving a second, lower royalty interest on global net sales of
ONPATTRO  originating  from  a  settlement  agreement  and  subsequent  license  agreement  with  Acuitas  Therapeutics,  Inc.  (“Acuitas”).  The  royalty  from
Acuitas has been retained by the Company and was not part of the royalty sale to OMERS.

11.    Contingencies and commitments

Product development partnership with the Canadian Government

The Company entered into a Technology Partnerships Canada (“TPC”) agreement with the Canadian Federal Government on November 12, 1999.  Under
this agreement, TPC agreed to fund 27% of the costs incurred by the Company, prior to March 31, 2004, in the development of certain oligonucleotide
product candidates up to a maximum contribution from TPC of $7.2 million (C$9.3 million).  The Company received a cumulative contribution of $2.7
million  (C$3.7  million).    In  return  for  the  funding  provided  by  TPC,  the  Company  agreed  to  pay  royalties  on  the  share  of  future  licensing  and  product
revenue,  if  any,  that  is  received  by  the  Company  on  certain  non-RNAi  oligonucleotide  product  candidates  covered  by  the  funding  under  the
agreement.  These royalties are payable until a certain cumulative payment amount is achieved or until a pre-specified date.  In addition, until a cumulative
amount equal to the funding actually received under the agreement has been paid to TPC, the Company agreed to pay 2.5% royalties on any royalties the
Company  receives  for  Marqibo,  a  chemotherapy  product  sold  by  Acrotech  Biopharma  LLC  (“Acrotech”).  For  the  years  ended  December  31,  2020  and
2019, the Company earned royalties on Marqibo sales in the amount of $0.3 million in each period. The resulting royalties payable by the Company to TPC
were not material in either period. The cumulative amount paid or accrued up to December 31, 2020 was less than $0.1 million, resulting in the contingent
amount due to TPC being $2.7 million (C$3.7 million).

Arbitration with the University of British Columbia

Certain early work on lipid nanoparticle delivery systems and related inventions was undertaken at the University of British Columbia (“UBC”), as well as
by Arbutus that was subsequently assigned to UBC. These inventions are licensed to the Company by UBC under a license agreement, initially entered into
in 1998 and as amended in 2001, 2006 and 2007. The Company has granted sublicenses under the UBC license to certain third parties, including Alnylam.
In November 2014, UBC filed a demand for arbitration against the Company which alleged entitlement to unpaid royalties. In August 2019, the arbitrator
issued  his  decision  for  the  second  phase  of  the  arbitration,  awarding  UBC  $5.9  million,  which  includes  interest  of  approximately  $2.6  million.  The
Company paid the $5.9 million award to UBC in September 2019 and recorded a charge of $6.3 million, consisting of $5.9 million for the award (including
interest) and $0.4 million for an estimate of a potential award for costs and attorneys’ fees. An award for costs and attorneys’ fees is still to be determined.

On December 18, 2020, UBC delivered to the Company a notice of arbitration alleging that under the cross license between UBC and Arbutus, it is due
royalties of $2.0 million plus interest arising from the Company’s sale to OMERS of part of its royalty interest on future global net sales of ONPATTRO,
currently being sold by Alnylam. The Company does not believe that any royalties are due to UBC and the Company intends to vigorously contest UBC’s
allegation.

80

Stock Purchase Agreement with Enantigen

In October 2014, Arbutus Inc., our wholly-owned subsidiary, acquired all of the outstanding shares of Enantigen Therapeutics, Inc. (“Enantigen”) pursuant
to  a  stock  purchase  agreement.  The  amount  paid  to  Enantigen’s  selling  shareholders  could  be  up  to  an  additional  $102.5  million  in  sales  performance
milestones  in  connection  with  the  sale  of  the  first  commercialized  product  by  Arbutus  for  the  treatment  of  HBV,  regardless  of  whether  such  product  is
based upon assets acquired under this agreement, and a low single-digit royalty on net sales of such first commercialized HBV product, up to a maximum
royalty payment of $1.0 million that, if paid, would be offset against Arbutus’ milestone payment obligations. Certain other development milestones related
to the acquisition were tied to programs which are no longer under development by Arbutus, and therefore the contingency related to those development
milestones is zero.

The  contingent  consideration  is  a  financial  liability  and  is  measured  at  its  fair  value  at  each  reporting  period,  with  any  changes  in  fair  value  from  the
previous reporting period recorded in the statement of operations and comprehensive loss (note 3).

The fair value of the contingent consideration was $3.4 million as of December 31, 2020.

12.    Collaborations, contracts and licensing agreements

Assembly Biosciences, Inc.

In  August  2020,  the  Company  entered  into  a  clinical  collaboration  agreement  with  Assembly  Biosciences,  Inc.  (“Assembly”)  to  evaluate  AB-729  in
combination with Assembly’s lead HBV core inhibitor (capsid inhibitor) candidate vebicorvir (“VBR”) and standard-of-care NA therapy for the treatment
of subjects with chronic HBV infection. The Company and Assembly will share in the costs of the collaboration. The Company incurred $0.2 million of
costs  related  to  the  collaboration  during  the  year  ended  December  31,  2020  and  reflected  those  costs  in  research  and  development  in  the  statements  of
operations  and  comprehensive  loss.  Except  to  the  extent  necessary  to  carry  out  Assembly’s  responsibilities  with  respect  to  the  collaboration  trial,  the
Company has not provided any license grant to Assembly for use of its AB-729 compound.

Alnylam Pharmaceuticals, Inc. and Acuitas Therapeutics, Inc.

The Company has two royalty entitlements to Alnylam’s global net sales of ONPATTRO.

In 2012, the Company entered into a license agreement with Alnylam that entitles Alnylam to develop and commercialize products with the Company’s
LNP technology. Alnylam’s ONPATTRO, which represents the first approved application of the Company’s LNP technology, was approved by the United
States  Food  and  Drug  Administration  (“FDA”)  and  the  European  Medicines  Agency  (“EMA”)  during  the  third  quarter  of  2018  and  was  launched  by
Alnylam immediately upon approval in the United States. Under the terms of this license agreement, the Company is entitled to tiered royalty payments on
global net sales of ONPATTRO ranging from 1.00% - 2.33% after offsets, with the highest tier applicable to annual net sales above $500 million. This
royalty  interest  was  sold  to  OMERS,  effective  as  of  January  1,  2019,  for  $20  million  in  gross  proceeds  before  advisory  fees.  OMERS  will  retain  this
entitlement until it has received $30 million in royalties, at which point 100% of this royalty entitlement on future global net sales of ONPATTRO will
revert back to the Company. OMERS has assumed the risk of collecting up to $30.0 million of future royalty payments from Alnylam and the Company is
not obligated to reimburse OMERS if they fail to collect any such future royalties. If this royalty entitlement reverts to the Company, it has the potential to
provide an active royalty stream or to be otherwise monetized again in full or in part. See note 10 for further details.

The Company also has rights to a second, lower royalty interest on global net sales of ONPATTRO originating from a settlement agreement and subsequent
license agreement with Acuitas. This royalty entitlement from Acuitas has been retained by the Company and was not part of the royalty entitlement sale to
OMERS.

81

 
 
Gritstone Oncology, Inc.

On October 16, 2017, the Company entered into a license agreement with Gritstone Oncology, Inc. (“Gritstone”) that granted them worldwide access to its
portfolio  of  proprietary  and  clinically  validated  LNP  technology  and  associated  intellectual  property  to  deliver  Gritstone’s  self-replicating,  non-mRNA,
RNA-based  neoantigen  immunotherapy  products.  Gritstone  paid  the  Company  an  upfront  payment,  and  will  make  payments  for  achievement  of
development, regulatory, and commercial milestones and royalties. As a result of the Company’s agreement with Genevant (see note 5 for details), from
April  11,  2018  going  forward,  Genevant  is  entitled  to  50%  of  the  revenues  earned  by  the  Company  from  Gritstone.  The  Company  is  the  agent  in  this
arrangement and records revenue on a net basis. Milestone  payments  that  are  not  within  the  control  of  the  Company  or  the  licensee,  such  as  those  that
require regulatory approvals, are not considered probable of being achieved until those approvals are received.

Acrotech Biopharma LLC and Spectrum Pharmaceuticals, Inc.

In May 2006, the Company signed a number of agreements with Talon Therapeutics, Inc. (“Talon,” formerly Hana Biosciences, Inc.) that granted Talon
worldwide licenses to certain of its LNP technology (the “Talon License Agreement”) for three of Talon’s chemotherapy products, Marqibo®, Alocrest ™
(Optisomal Vinorelbine) and Brakiva ™ (Optisomal Topotecan).

In  2012,  Talon  received  approval  for  Marqibo  from  the  FDA  for  the  treatment  of  adult  patients  with  Philadelphia  chromosome  negative  acute
lymphoblastic  leukemia  in  second  or  greater  relapse  or  whose  disease  has  progressed  following  two  or  more  anti-leukemia  therapies.  Marqibo  is  a
liposomal  formulation  of  the  chemotherapy  drug,  vincristine.  In  2012,  the  Company  received  a  milestone  payment  of  $1.0  million  based  on  the  FDA’s
approval  of  Marqibo  and  receives  royalty  payments  based  on  Marqibo’s  commercial  sales.  There  are  no  further  milestones  related  to  Marqibo  but  the
Company is eligible to receive total milestone payments of up to $18.0 million on Alocrest and Brakiva. Talon was acquired by Spectrum Pharmaceuticals,
Inc. in July 2013, who subsequently sold the license of Marqibo to Acrotech in January 2019. The acquisitions and license sale did not affect the terms of
the license between Talon and the Company.

Revenues are summarized in the following table:

Revenue from collaborations and licenses

Acuitas Therapeutics, Inc.
Gritstone Oncology, Inc.
Acrotech Biopharma, LLC

Non-cash royalty revenue

Alnylam Pharmaceuticals, Inc.

Total revenue

13.    Shareholders’ equity

Authorized share capital

Year ended December 31,

2020

2019

(in thousands)

$

$

3,259  $
— 
269 

3,386 
6,914  $

1,931 
1,819 
605 

1,656 
6,011 

The Company’s authorized share capital consists of an unlimited number of common shares and 1,164,000 preferred shares without par value.

82

  
 
Open Market Sale Agreement

In December 2018, the Company entered into an Open Market Sale Agreement (“the Sale Agreement”) with Jefferies LLC
(“Jefferies”), under which it could issue and sell common shares, from time to time, for an aggregate sales price of up to $50 million. In December 2019,
the Company entered into an amendment to the Sale Agreement with Jefferies (the “2019 Amendment”) in connection with the filing of a shelf registration
statement  on  Form  S-3  (File  No.  333-235674),  filed  with  the  SEC  on  December  23,  2019  (the  “Shelf  Registration  Statement”).  The  2019  Amendment
revised the original Sale Agreement to reflect that the Company could sell its common shares, without par value, from time to time, for an aggregate sales
price  of  up  to  $50  million,  under  the  Shelf  Registration  Statement.  In  July  2020,  the  Company  fully  utilized  the  remaining  availability  under  the  Sale
Agreement,  as  amended  by  the  2019  Amendment.  In  August  2020,  the  Company  entered  into  a  new  amendment  to  the  Sale  Agreement  (the  “2020
Amendment”) with Jefferies. Pursuant to the 2020 Amendment, the Company can issue and sell common shares, from time to time, for an aggregate sales
price of up to $75 million under the Sale Agreement, as amended.

For  the  year  ended  December  31,  2020,  the  Company  issued  24,728,368  common  shares  pursuant  to  the  Sale  Agreement,  resulting  in  net  proceeds  of
approximately $86.3 million. From January 1, 2021 through March 3, 2021, the Company received an additional $24.3 million of net proceeds from the
issuance of 5.8 million common shares under the ATM program.

For  the  year  ended  December  31,  2019,  the  Company  issued  9,138,232  common  shares  pursuant  to  the  Sale  Agreement,  resulting  in  net  proceeds  of
approximately $19.5 million.

Series A Preferred Shares

On October 2, 2017, the Company announced that it entered into a subscription agreement with Roivant for the sale of Preferred Shares to Roivant for
gross proceeds of $116.4 million. The Preferred Shares are non-voting and are convertible into common shares at a conversion price of $7.13 per share
(which represents a 15% premium to the closing price of $6.20 per share). The purchase price for the Preferred Shares plus an amount equal to 8.75% per
annum,  compounded  annually,  will  be  subject  to  mandatory  conversion  into  approximately  23  million  common  shares  on  October  18,  2021  (subject  to
limited exceptions in the event of certain fundamental corporate transactions relating to Arbutus’ capital structure or assets, which would permit earlier
conversion at Roivant’s option). Assuming conversion of the Preferred Shares into common shares, based on the number of common shares outstanding on
December 31, 2020 Roivant would hold 33% of the Company’s common shares. Roivant has agreed to a four year lock-up period for this investment and
its existing holdings in Arbutus. Roivant has also agreed to a four year standstill whereby Roivant will not acquire greater than 49.99% of the Company’s
common  shares  or  securities  convertible  into  common  shares.  The  initial  investment  of  $50.0  million  closed  on  October  16,  2017,  and  the  remaining
amount of $66.4 million closed on January 12, 2018 following regulatory and shareholder approvals.

The  Company  records  the  Preferred  Shares  wholly  as  equity  with  no  bifurcation  of  conversion  feature  from  the  host  contract,  given  that  the  Preferred
Shares cannot be cash settled and the redemption features are within the Company’s control, which include a fixed conversion ratio with predetermined
timing  and  proceeds.  The  Company  accrues  for  the  8.75%  per  annum  compounding  coupon  at  each  reporting  period  end  date  as  an  increase  to  share
capital, and an increase to deficit (see statement of stockholder’s equity).

83

14.    Stock-based compensation

Awards outstanding and available for issuance

During  the  year  ended  December  31,  2020,  the  Company  had  stock  options  outstanding  under  the  following  plans  (collectively,  the  “Plans”):  the  2016
Omnibus Share and Incentive Plan (the “2016 Plan”), the 2011 Omnibus Share Compensation Plan (the “2011 Plan”), the 2019 inducement grant and the
OnCore Option Plan.

As of December 31, 2020, the aggregate number of shares authorized for awards under all Plans was 15,790,202. As of December 31, 2020, the Company
had 10,669,776 options outstanding and 3,161,471 awards available for issuance under the Plans. 

The Company issues new common shares of stock to settle options exercised.

Under the 2016 and 2011 Plans, the Company’s board of directors may grant options, and other types of awards, to employees, directors and consultants of
the Company.  The exercise price of the options is determined by the Company’s board of directors but will be at least equal to the closing market price of
the common shares on the date of grant or the prior day and the term may not exceed 10 years.  Options granted generally vest over three or four years for
employees and for directors’ initial grants, and immediately for directors’ annual grants.

In June 2019, the Company provided an inducement grant of 1,112,000 options to its newly hired Chief Executive Officer. These options were awarded in a
separate plan as non-qualified awards and are governed by the substantially the same terms as the 2016 Plan.

Hereafter, information on options governed by the 2016 Plan, the 2011 Plan and inducement grant (the “Arbutus Plans”) is presented on a consolidated
basis as the terms of the plans are similar. Information on the OnCore Option Plan is presented separately.

84

Stock options under the Arbutus Plans

Equity-classified stock options under the Arbutus Plans

The following table summarizes activity related to the Company’s equity-classified stock options, including its performance options, for the year ended
December 31, 2020:

Stock Options Outstanding

Vested Stock Options

Non-Vested Stock Options

Number

Weighted-Average
Exercise Price

Number

Number

Balance as of December 31, 2019
Options granted
Options exercised
Options forfeit, canceled or expired
Options vested
Balance as of December 31, 2020

8,249,093  $
2,865,350  $
(125,649) $
(597,118) $
—  $
10,391,676  $

5.00 
3.21 
3.04 
5.10 
— 
4.53 

4,294,649 
— 
(125,649)
(313,861)
2,529,247 
6,384,386 

Weighted-Average
Grant-Date Fair Value
2.86 
2.20 
— 
2.53 
2.69 
2.51 

3,954,444  $
2,865,350  $
—  $
(283,257) $
(2,529,247) $
4,007,290  $

The intrinsic value of options exercised under the Arbutus Plans during 2020 and 2019 are $0.3 million and less than $0.1 million, respectively.

The following table summarizes additional information related to the Company’s equity-classified stock options, including its performance options, as of
December 31, 2020:

As of December 31, 2020

Options outstanding and expected to vest
Number of stock options outstanding
Weighted-average exercise price
Intrinsic value (in $000s)
Weighted-average term remaining

Vested stock options

Number of vested stock options
Weighted-average exercise price
Intrinsic value (in $000s)
Weighted-average term remaining

$
$

$
$

10,391,676 
4.53 
3,532 
6.7 years

6,384,386 
5.11 
1,758 
5.5 years

The assumptions used in the Black-Scholes option-pricing for grants made during the years ended December 31, 2020 and 2019 are as follows:

Expected average option term
Expected volatility
Expected dividends
Risk-free interest rate

Liability-classified stock options under the Arbutus Plans

December 31, 2020

December 31, 2019

6.2 years
80.2 %
— %
1.2 %

7.3 years
75.9 %
— %
2.27 %

Due to the change in the Company’s functional currency as of January 1, 2016, certain stock option awards with exercise prices denominated in Canadian
dollars changed from equity classification to liability classification (see note 2).

85

The following table summarizes activity related to the Company’s liability-classified stock options for the year ended December 31, 2020:

Balance as of December 31, 2019
Options exercised
Options forfeit, canceled or expired
Balance as of December 31, 2020

Stock Options Vested and Outstanding

Number

Weighted-Average Exercise Price

227,500  $
(25,000) $
(5,000) $
197,500  $

5.49 
3.02 
3.02 
6.00 

The intrinsic value of liability-classified options exercised during 2020 was less than $0.1 million.

The following table summarizes additional information related to the Company’s liability-classified stock options as of December 31, 2020:

Options outstanding and expected to vest

Intrinsic value (in $000s)
Weighted-average term remaining

As of December 31, 2020

$

158 
0.9 years

Liability options are re-measured to their fair values at each reporting date, using the Black-Scholes valuation model.

The  weighted  average  Black-Scholes  option-pricing  assumptions  and  the  resultant  fair  values  as  of  December  31,  2020  and  December  31,  2019,  are
presented in the following table:

Stock price
Expected average option term
Expected volatility
Expected dividends
Risk-free interest rate
Weighted-average fair value per share
Total fair value of vested liability-classified options (in $000s)

OnCore Option Plan

December 31, 2020

December 31, 2019

$

$
$

3.55 
0.9 years
105.66 %
— %
0.11 %
1.30 
250 

$

$
$

2.78 
1.6 years
113.1 %
— %
1.59 %
1.11 
253 

The Company has reserved shares for the future exercises of OnCore stock options that were granted prior to the merger in 2015. The Company is not
permitted to grant any further options under the OnCore Option Plan.

The following table summarizes activity related to the OnCore stock options for the year ended December 31, 2020:

Balance as of December 31, 2019
Options exercised
Options forfeit, canceled or expired
Balance as of December 31, 2020

Number of OnCore Options
99,290 
(19,255)
— 
80,035 

Stock Options Vested and Outstanding
Number of Equivalent
Company Common Shares

Weighted-Average Exercise
Price

99,991  $
(19,391) $
—  $
80,600  $

0.56 
0.56 
— 
0.56 

86

The intrinsic value of options exercised under the OnCore plan during each of 2020 and 2019 was $0.1 million.

The following table summarizes additional information related to the OnCore stock options as of December 31, 2020:

Vested stock options
Intrinsic value (in $000s)
Weighted-average term remaining

Employee Stock Purchase Plan

As of December 31, 2020

$

241 
3.8 years

In May 2020, the Company’s stockholders approved the 2020 Employee Stock Purchase Plan (ESPP) which became effective on May 28, 2020. A total of
1,500,000 common shares were reserved for issuance under the ESPP. Company employees contribute funds via payroll deductions, which are used to buy
Company  common  shares  at  a  discount  of  up  to  15%  based  on  the  lower  of  the  price  at  the  start  of  the  offering  period  and  at  the  end  of  the  relevant
purchase period within such offering period. The initial offering period under the ESPP is September 1, 2020 through August 31, 2021 with purchase dates
set  on  February  26,  2021  and  August  31,  2021.  All  1,500,000  common  shares  remained  available  for  future  issuance  under  the  ESPP  at  December  31,
2020. For the year ended December 31, 2020, the Company recognized $0.2 million of stock-based compensation expense related to the ESPP. The  fair
value of the right to acquire stock at a discounted price under the ESPP is calculated using the Black-Scholes valuation model and recorded as stock-based
compensation. Expense is recognized over the period the employee contributes to the plan through payroll deductions.

Stock-based compensation expense

Total stock-based compensation expense was comprised of: (1) vesting of options awarded to employees under the Arbutus and OnCore Plans calculated in
accordance  with  the  fair  value  method  as  described  above;  (2)  fair  value  adjustments  for  the  Company’s  liability-classified  stock  options;  and  (3)
amortization of compensation cost related to the ESPP.

The Company recognizes forfeitures as they occur, and the effects of forfeitures are reflected in stock-based compensation expense.

Stock-based compensation has been recorded in the consolidated statement of operations and comprehensive income (loss) as follows:

Research and development
General and administrative

Total

Year Ended December 31

2020

2019

(in thousands)

3,090  $
3,071 
6,161  $

2,971 
3,828 
6,799 

$

$

During  the  year  ended  December  31,  2019,  the  Company  recognized  $1.1  million  of  non-cash  stock-based  compensation  expense  for  the  accelerated
vesting stock options, related to the departure of the Company’s former President and Chief Executive Officer in June of 2019.

At December 31, 2020, there remains $7.8 million of unearned compensation expense related to unvested equity employee stock options to be recognized
as expense over a weighted-average period of approximately 2.3 years.

For the year ended December 31, 2020, the Company recognized $0.3 million of performance based stock compensation expense which is included in the
table above.

15.    Income taxes

87

 
 
The Company is subject to taxation and files income tax returns in Canadian federal and provincial, United States federal and several state jurisdictions.
The  United  States  Internal  Revenue  service  is  currently  examining  the  Company’s  federal  tax  return  for  2018.  The  outcome  of  tax  audits  cannot  be
predicted  with  certainty,  however  the  Company  believes  that  an  adequate  provision  has  been  made  for  any  adjustments  that  may  result  from  the
examination. If any issues addressed in the Company’s tax audits are resolved in a manner not consistent with management’s expectations, the Company
could be required to adjust its provision for income tax in the period such resolution occurs.

Income tax (benefit) expense varies from the amounts that would be computed by applying the combined Canadian federal and provincial income tax rate
of 27% (2019 - 27%) to the loss before income taxes as shown in the following tables:

Computed taxes (benefits) at Canadian federal and provincial tax rates
Difference due to change in tax rate on opening deferred taxes
Adjustment to prior year
Permanent and other differences
Change in valuation allowance - other
Difference due to income taxed at foreign rates
Stock-based compensation
Impairment of goodwill
Income tax expense (recovery)

Year ended December 31,

2020

2019

(in thousands)

(17,211) $
— 
390 
622 
12,033 
3,716 
450 
— 
—  $

(44,922)
8,356 
(525)
3,458 
19,078 
(3,343)
523 
4,719 
(12,656)

$

$

As of December 31, 2020, the Company has investment tax credits available to reduce Canadian federal income taxes of $8.0 million, versus $10.0 million
as of December 31, 2019, which expire between 2030 and 2037, and provincial income taxes of $2.6 million, versus $4.5 million as of December 31, 2019,
which expire between 2024 and 2027. In addition, the Company has research and development credits of $3.9 million as of December 31, 2020, and $3.9
million as of December 31, 2019, which expire between 2031 and 2038 and which can be used to reduce future taxable income in the United States.

As of December 31, 2020, the Company had scientific research and experimental development expenditures of $58.6 million available for indefinite carry-
forward, versus the $60.6 million it had as of December 31, 2019. The Company also had net operating losses of $175.6 million as of December 31, 2020
and $164.9 million as of December 31, 2019, which are due to expire between 2028 and 2038 and which can be used to offset future taxable income in
Canada.

As of December 31, 2020 and December 31, 2019, the Company had $11.7 million of net operating losses due to expire in 2035 which can be used to offset
future taxable income in the United States. Future use of a portion of the United States loss carryforwards are subject to limitations under Internal Revenue
Code Section 382. United States net operating loss carryforwards arising in 2019 and future periods have an indefinite carryforward period.

As  a  result  of  ownership  changes  occurring  on  October  1,  2014  and  March  4,  2015,  the  Company’s  ability  to  use  these  losses  may  be  limited.  Losses
incurred to date may be further limited if a subsequent change in control occurs.

The Company generated $1.8 million and $61.9 million in pre-tax domestic and foreign losses, respectively, for the year ended December 31, 2020. The
Company generated $27.1 million and $139.3 million in pre-tax domestic and foreign losses, respectively, for the year ended December 31, 2019.

88

 
 
Significant components of the Company’s deferred tax assets and liabilities are shown below:

Deferred tax assets (liabilities):

Non-capital losses carryforwards
Research and development deductions
Book amortization in excess of tax
Revenue recognized for tax purposes in excess of revenue recognized for accounting purposes
Tax value in excess of accounting value in lease inducements
Federal investment tax credits
Provincial investment tax credits
Equity accounted for investment
Federal R&E credits
Deductible stock options
Other

Total deferred tax assets
Valuation allowance

Net deferred tax assets (liabilities)

16.    Related party transactions

As of December 31,

2020

2019

(in thousands)

74,351  $
15,812 
(737)
5,279 
627 
5,872 
2,644 
3,375 
3,897 
2,457 
1,218 
114,795  $
(114,795)

—  $

59,956 
16,349 
(914)
5,128 
705 
7,325 
4,535 
3,038 
3,897 
1,632 
1,111 
102,762 
(102,762)
— 

$

$

$

On  July  31,  2020,  Genevant  was  recapitalized  through  an  equity  investment  and  conversion  of  previously  issued  convertible  debt  securities  held  by
Roivant. Arbutus participated in the recapitalization of Genevant with an investment of $2.5 million. Arbutus determined that this $2.5 million additional
investment in Genevant represented the funding of prior losses and accordingly, the Company recorded the amount as an equity investment loss on the
Condensed Consolidated Statements of Operations and Comprehensive Loss in 2020. See note 5 for further details.

Genevant purchased certain administrative and transitional services from the Company totaling less than $0.1 million and $0.1 million during 2020 and
2019, respectively. These services were billed at agreed hourly rates and reflective of market rates for such services and these costs were netted in research
and development in the income statement.

In  addition,  Genevant  had  a  sublease  for  17,900  square  feet  in  the  Company’s  Burnaby  facility.  Sublease  income,  including  management  fee
reimbursements, from Genevant was $0.2 million in 2019 the last year under the Burnaby facility lease, which was netted against site consolidation costs in
the income statement.

89

 
 
 
 
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Disclosure Controls and Procedures

Our management, including our principal executive officer and principal financial officer, has evaluated the effectiveness of the design and operation of our
disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange
Act”)), as of the end of the period covered by this Annual Report on Form 10-K. Based upon that evaluation, our Chief Executive Officer (our principal
executive  officer)  and  Chief  Financial  Officer  (our  principal  financial  officer),  concluded  that,  as  of  December  31,  2020,  our  disclosure  controls  and
procedures were effective to provide reasonable assurance that (a) the information required to be disclosed by us in the reports that we file or submit under
the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and (b) such information
is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely
decisions regarding required disclosure.

In  designing  and  evaluating  our  disclosure  controls  and  procedures,  our  management  recognized  that  any  controls  and  procedures,  no  matter  how  well
designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and our management necessarily was required to
apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Management’s Annual Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act
Rules  13a-15(f)  and  15d-15(f).  Under  the  supervision  and  with  the  participation  of  our  management,  including  our  principal  executive  officer  and  our
principal financial officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in the
Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO 2013”).

Our 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 in the United States of America. Our
internal  control  over  financial  reporting  includes  those  policies  and  procedures  that  (i)  pertain  to  the  maintenance  of  records  that,  in  reasonable  detail,
accurately and fairly reflect the transactions and dispositions of our assets; (ii) provide reasonable assurance that transactions are recorded as necessary to
permit preparation of financial statements in accordance with generally accepted accounting principles, and our receipts and expenditures are being made
only in accordance with authorizations of our management and directors; and (iii) provide reasonable assurance regarding prevention or timely detection of
unauthorized acquisition, use, or disposition of our 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. Based on our evaluation under the framework in COSO 2013, our management concluded that
our internal control over financial reporting was effective as of December 31, 2020.

Changes in Internal Control over Financial Reporting

There have not been changes in our internal control over financial reporting during the quarter ended December 31, 2020 that have materially affected or
are reasonably likely to materially affect the Company’s internal control over financial reporting.

90

 
 
 
Item 9B. Other Information

None.

91

Item 10. Directors, Executive Officers and Corporate Governance

PART III

The information required by this item is incorporated herein by reference to our Proxy Statement for the 2021 Annual General Meeting of the Stockholders
to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

We  have  adopted  a  code  of  business  conduct  for  directors,  officers  and  employees  (the  “Code  of  Conduct”),  which  is  available  on  our  website  at
http://investor.arbutusbio.com/corporate-governance-0 and also at www.sedar.com. We intend to satisfy the disclosure requirement under Item 5.05 of Form
8-K regarding any amendment to, or waiver from, a provision of this Code of Conduct by posting such information on the website address and location
specified above.

Item 11. Executive Compensation

The information required by this item is incorporated herein by reference to our Proxy Statement for the 2021 Annual General Meeting of the Stockholders
to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by this item is incorporated herein by reference to our Proxy Statement for the 2021 Annual General Meeting of the Stockholders
to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information required by this item is incorporated herein by reference to our Proxy Statement for the 2021 Annual General Meeting of the Stockholders
to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

Item 14. Principal Accounting Fees and Services

The information required by this item is incorporated herein by reference to our Proxy Statement for the 2021 Annual General Meeting of the Stockholders
to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

92

Item 15. Exhibits and Financial Statement Schedules

PART IV

Exhibit

2.1*

3.1*

3.2*

4.1*

4.2**

10.1†*

10.2†*

10.3†*

10.4*#

10.5†*

10.6†*

10.7†*

10.8†*

10.9*#

  Description

Agreement and Plan of Merger and Reorganization, dated January 11, 2015, by and among Tekmira Pharmaceuticals Corporation, TKM
Acquisition Corporation and OnCore Biopharma, Inc. (incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current
Report on Form 8-K/A filed with the SEC on January 26, 2015).

Notice of Articles and Articles of the Company, as amended.(incorporated herein by reference to Exhibit 3.1 to the Registrant’s Annual
Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on March 16, 2018).

Amendment to Articles of the Company (incorporated herein by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form
10-Q for the quarter ended September 30, 2018, filed with the SEC on November 7, 2018).

Amended and Restated Governance Agreement between the Company and Roivant Sciences Ltd., a Bermuda exempted company, dated
October 16, 2017 (incorporated herein by reference to Exhibit C to the Registrant’s Preliminary Proxy Soliciting Materials on Schedule
Pre 14A for the Special Meeting, filed with the SEC on November 21, 2017).

Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934.

Amended and Restated License Agreement, between Inex Pharmaceuticals Corporation and Hana Biosciences, Inc., dated April 30,
2007 (incorporated herein by reference to Exhibit 4.2 to the Registrant’s Amendment No. 1 to Form 20-F for the year ended December
31, 2010 filed with the SEC on January 31, 2012).

Amendment No. 1 to the Amended and Restated Agreement, between the Company (formerly Inex Pharmaceuticals Corporation) and
Hana Biosciences, Inc., effective as of May 27, 2009 (incorporated herein by reference to Exhibit 4.1 to the Registrant’s Annual Report
on Form 20-F for the year ended December 31, 2010 filed with the SEC on June 3, 2011).

Amendment No. 2 to the Amended and Restated Agreement, between the Company (formerly Inex Pharmaceuticals Corporation) and
Hana Biosciences, Inc., effective as of September 20, 2010 (incorporated herein by reference to Exhibit 4.21 to the Registrant’s Annual
Report on Form 20-F for the year ended December 31, 2010 filed with the SEC on June 3, 2011).

Form of Indemnity Agreement (refiled herein with initial Agreement by reference to Exhibit 4.15 to the Registrant’s Annual Report on
Form 20-F for the year ended December 31, 2010 filed with the SEC on June 3, 2011).

License Agreement between the University of British Columbia and Inex Pharmaceuticals Corporation executed on July 30, 2001
(incorporated herein by reference to Exhibit 4.17 to the Registrant’s Annual Report on Form 20-F for the year ended December 31,
2010 filed with the SEC on June 3, 2011).

Amendment Agreement between the University of British Columbia and Inex Pharmaceuticals Corporation dated July 11, 2006
(incorporated herein by reference to Exhibit 4.18 to the Registrant’s Annual Report on Form 20-F for the year ended December 31,
2010 filed with the SEC on June 3, 2011).

Second Amendment Agreement between the University of British Columbia and Inex Pharmaceuticals Corporation dated January 8,
2007 (incorporated herein by reference to Exhibit 4.19 to the Registrant’s Annual Report on Form 20-F for the year ended December
31, 2010 filed with the SEC on June 3, 2011).

Consent Agreement of the University of British Columbia to Inex/Alnylam Sublicense Agreement dated January 8, 2007 (incorporated
herein by reference to Exhibit 4.20 to the Registrant’s Annual Report on Form 20-F for the year ended December 31, 2010 filed with
the SEC on June 3, 2011).

Tekmira 2011 Omnibus Share Compensation Plan approved by shareholders on June 22, 2011 (incorporated herein by reference to
Exhibit 4.25 to the Registrant’s Annual Report on Form 20-F for the year ended December 31, 2011 filed with the SEC on March 27,
2012).

93

10.10†*

10.11†*

10.12*

10.13*

10.14*#

10.15*#

10.16†*

10.17*#

10.18*#

10.19*†

10.20*†

10.21*

10.22*

10.23*

10.24*

10.25*

Settlement Agreement and General Release, by and among Tekmira Pharmaceuticals Corporation, Protiva Biotherapeutics Inc.,
Alnylam Pharmaceuticals, Inc., and AlCana Technologies, Inc., dated November 12, 2012 (incorporated herein by reference to Exhibit
4.26 to the Registrant’s Annual Report on Form 20-F for the year ended December 31, 2012 filed with the SEC on March 27, 2013).

Cross-License Agreement by and among Alnylam Pharmaceuticals, Inc., Tekmira Pharmaceuticals Corporation and Protiva
Biotherapeutics Inc., dated November 12, 2012 (incorporated herein by reference to Exhibit 4.27 to the Registrant’s Annual Report on
Form 20-F for the year ended December 31, 2012 filed with the SEC on March 27, 2013).

Form of Standstill Agreement (incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K/A filed
with the SEC on January 26, 2015).

Form of Representation Letter (incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K/A filed
with the SEC on January 26, 2015).

Executive Employment Agreement, dated effective as of February 25, 2016, between Arbutus Biopharma, Inc. and Elizabeth Howard
(incorporated herein by reference to Exhibit 10.78 to the Registrant’s Annual Report on Form 10-K for the year ended December 31,
2015, filed with the SEC on March 9, 2016).

Amending Agreement, dated as of November 2, 2015, among Arbutus Biopharma Corporation, Roivant Sciences Ltd., Patrick T.
Higgins, Michael J. McElhaugh, Michael J. Sofia and Bryce A. Roberts (incorporated herein by reference to Exhibit 10.3 to the
Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2015, filed with the SEC on November 5, 2015).

Stock Purchase Agreement by and among OnCore Biopharma, Inc. and each of the stockholders of Enantigen Therapeutics, Inc., dated
as of October 1, 2014 (incorporated herein by reference to Exhibit 10.3 to the Registrant’s Quarterly Report on Form 10-Q for the
quarter ended March 31, 2015, filed with the SEC on May 6, 2015).

Executive Employment Agreement, dated effective as of July 11, 2015, between OnCore Biopharma, Inc. and Michael J. Sofia
(incorporated herein by reference to Exhibit 10.8 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30,
2015, filed with the SEC on August 7, 2015).

Amended 2011 Omnibus Share Compensation Plan (incorporated herein by reference to Exhibit 10.1 to the Registrant’s Quarterly
Report on Form 10-Q for the quarter ended June 30, 2016, filed with the SEC on August 4, 2016).

Lease Agreement between the Company and ARE-PA Region No. 7, LLC dated August 9, 2016 (incorporated herein by reference to
Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2016, filed with the SEC on
November 3, 2016).

First Amendment to Lease Agreement between Arbutus Biopharma, Inc. and ARE-PA Region No. 7, LLC dated October 7, 2016
(incorporated herein by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September
30, 2016, filed with the SEC on November 3, 2016).

Acknowledgment of Commencement Date in connection with Lease Agreement between the Company and ARE-PA Region No. 7,
LLC dated August 9, 2016 and as amended on October, 7, 2016 (incorporated herein by reference to Exhibit 10.3 to the Registrant’s
Quarterly Report on Form 10-Q for the quarter ended September 30, 2016, filed with the SEC on November 3, 2016).

Subscription Agreement and Related Documents between the Company and Roivant Sciences Ltd. (incorporated herein by reference to
Exhibit A to the Registrant’s Preliminary Proxy Soliciting Materials on Schedule Pre 14A for the Special Meeting, filed with the SEC
on November 21, 2017).

Amended and Restated Lockup Agreement between the Company and Roivant Sciences Ltd. (incorporated herein by reference to
Exhibit D to the Registrant’s Preliminary Proxy Soliciting Materials on Schedule Pre 14A for the Special Meeting, filed with the SEC
on November 21, 2017).

Form of Registration Rights Agreement (incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-
K/A filed with the SEC on January 26, 2015).

Amendment to Registration Rights Agreement between the Company and Roivant Sciences Ltd. (incorporated herein by reference to
Exhibit E to the Registrant’s Preliminary Proxy Soliciting Materials on Schedule Pre 14A for the Special Meeting, filed with the SEC
on November 21, 2017).

94

10.26*

10.27*

10.28*

10.29*

10.30*

10.31*

10.32*

10.33*#

10.34*#

10.35*#

10.36*

10.37*#

10.38*#

10.39*#

10.40*

10.41*#

10.42*#

Amended and Restated Standstill Agreement between the Company and Roivant Sciences Ltd. (incorporated herein by reference to
Exhibit F to the Registrant’s Preliminary Proxy Soliciting Materials on Schedule Pre 14A for the Special Meeting, filed with the SEC
on November 21, 2017).

Preferred Share Article Amendment between the Company and Roivant Sciences Ltd. (incorporated herein by reference to Exhibit G to
the Registrant’s Preliminary Proxy Soliciting Materials on Schedule Pre 14A for the Special Meeting, filed with the SEC on November
21, 2017).

Exclusivity Agreement, dated February 13, 2018, by and between the Company and Roivant Sciences Ltd. (incorporated herein by
reference to Exhibit 7.09 of the Schedule 13D filed with the SEC by Roivant Sciences Ltd. on February 14, 2018).

Master Contribution And Share Subscription Agreement, by and between the Company, Genevant Sciences Ltd. and Roivant Sciences
LTD. (incorporated herein by reference Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the Quarter ended March 31,
2018 filed with the SEC on May 4, 2018).

Open Market Sale AgreementSM, dated December 20, 2018, by and between the Company and Jefferies LLC. (incorporated herein by
reference to Exhibit 1.1 of the Current Report on Form 8-K filed with the SEC on December 20, 2018).

Amendment No. 1 to the Open Market Sale AgreementSM, dated December 20, 2019, by and between the Company and Jefferies LLC.
(incorporated herein by reference to Exhibit 1.3 to the Registrant’s Registration Statement on Form S-3 filed with the SEC on December
20, 2019).

Amendment No. 2 to the Open Market Sale AgreementSM, dated August 7, 2020, by and between the Company and Jefferies LLC.
(incorporated herein by reference to Exhibit 1.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on August 7, 2020).

Executive Employment Agreement, dated June 11, 2018, by and between the Company and David Hastings. (incorporated herein by
reference to Exhibit 10.52 of the Form 10-K filed with the SEC on March 7, 2019).

Executive Signing Bonus, dated May 28, 2018, by and between the Company and David Hastings. (incorporated herein by reference to
Exhibit 10.53 of the Form10-K filed with the SEC on March 7, 2019).

Executive Employment Agreement, dated October 8, 2018, by and between the Company and Gaston Picchio (incorporated by
reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the Quarter ended September 30, 2018, filed with the
SEC on November 7, 2018).

Separation Agreement and Release, dated June 13, 2019, by and the Company and Mark J. Murray (incorporated herein by reference to
Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on June 18, 2019).

Employment Agreement, dated June 13, 2019, by and between the Company and William H. Collier (incorporated herein by reference
to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed with the SEC on June 18, 2019).

Form of Indemnity Agreement (incorporated herein by reference to Exhibit 10.4 the Registrant’s Current Report on Form 8-K filed with
the SEC on June 18, 2019).

Executive Employment Agreement, dated July 10, 2015, by and between the Company and Michael McElhaugh, as amended by the
First Amendment to Executive Employment Agreement, dated April 20, 2016, and the Second Amendment to Executive Employment
Agreement dated December 11, 2018 (incorporated herein by reference to Exhibit 10.5 to the Registrant’s Quarterly Report on Form
10-Q for the Quarter ended June 30, 2019, filed with the SEC on August 5, 2019).

Purchase and Sale Agreement, dated July 2, 2019, by and between the Company and OCM IP Healthcare Portfolio LP (incorporated
herein by reference to Exhibit 10.6 to the Registrant’s Quarterly Report on Form 10-Q for the Quarter ended June 30, 2019, filed with
the SEC on August 5, 2019).

Arbutus Biopharma Corporation 2016 Omnibus Share and Incentive Plan, as supplemented by the Committee on May 28, 2020
(incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on June 1, 2020).

Arbutus Biopharma Corporation 2020 Employee Stock Purchase Plan (incorporated herein by reference to Exhibit 10.2 to the
Registrant’s Current Report on Form 8-K filed with the SEC on June 1, 2020).

95

10.43*#

10.44*#

10.45*#

10.46*#

10.47†*

10.48†*

10.49†*

16.1*

21.1**

23.1**

31.1**

31.2**

32.1**

32.2**

Form of Arbutus Biopharma Corporation Option Agreement (incorporated herein by reference to Exhibit 10.8 to the Registrant’s
Quarterly Report on Form 10-Q for the Quarter ended June 30, 2019, filed with the SEC on August 5, 2019).

Option Agreement, dated June 24, by and between the Company and William H. Collier (incorporated herein by reference to Exhibit
10.9 to the Registrant’s Quarterly Report on Form 10-Q for the Quarter ended June 30, 2019, filed with the SEC on August 5, 2019).

Form of Arbutus Biopharma Corporation Indemnity Agreement (incorporated herein by reference to Exhibit 10.1 to the Registrant’s
Quarterly Report on Form 10-Q for the Quarter ended September 30, 2019, filed with the SEC on November 6, 2019).

Offer Letter, dated August 8, 2019, by and between the Company and Andrew Cheng (incorporated herein by reference to Exhibit 10.3
to the Registrant’s Quarterly Report on Form 10-Q for the Quarter ended September 30, 2019, filed with the SEC on November 6,
2019).

Cross License Agreement, dated April 11, 2018, by and between the Company and Genevant Sciences Ltd. (incorporated herein by
reference to Exhibit 10.3 to the Registrant’s Quarterly Report on Form 10-Q for the Quarter ended June 30, 2020, filed with the SEC on
August 7, 2020).

First Amendment to Cross License Agreement, dated June 27, 2018, by and among the Company, Genevant Sciences Ltd and Genevant
Sciences GmbH. (incorporated herein by reference to Exhibit 10.4 to the Registrant’s Quarterly Report on Form 10-Q for the Quarter
ended June 30, 2020, filed with the SEC on August 7, 2020).

Second Amendment to Cross License Agreement, dated June 27, 2018, by and among the Company, Genevant Sciences Ltd. and
Genevant Sciences GmbH. (incorporated herein by reference to Exhibit 10.5 to the Registrant’s Quarterly Report on Form 10-Q for the
Quarter ended June 30, 2020, filed with the SEC on August 7, 2020).

Letter from KPMG LLP, dated April 23, 2019. (incorporated herein by reference to Exhibit 16.1 to the Registrant’s Current Report on
Form 8-K filed with the SEC on April 23, 2019.)

List of Subsidiaries.

Consent of Ernst and Young LLP, an Independent Registered Public Accounting Firm.

Certification of Chief Executive Officer pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934, as adopted pursuant
to Section 302 of the Sarbanes-Oxley Act of 2002.

Certification of Chief Financial Officer pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934, as adopted pursuant
to Section 302 of the Sarbanes-Oxley Act of 2002.

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

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

101.INS**

  XBRL Instance Document

101.SCH**

  XBRL Taxonomy Extension Schema Document

101.CAL**

  XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF**

  XBRL Taxonomy Extension Definition Linkbase Document

101.LAB**

  XBRL Taxonomy Extension Label Linkbase Document

101.PRE**

  XBRL Taxonomy Extension Presentation Linkbase Document

104

Cover Page Interactive Data File (formatted as Inline XBRL and Contained in Exhibit 101).

*     Previously filed

**    Filed or furnished herewith, as applicable

96

†     Portions of this exhibit have been omitted in compliance with Item 601 of Regulation S-K.

#    Management Contract or Compensatory Arrangement.

Financial Statements

 See Index to Consolidated Financial Statements under Item 8 of Part II.

Financial Statement Schedules

 None

Item 16.     Form 10-K Summary

    None

97

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 on March 4, 2021.

SIGNATURES

ARBUTUS BIOPHARMA CORPORATION

By:

/s/ William Collier
William Collier
President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant
and in the capacities indicated on March 4, 2021.

Signatures

Capacity in Which Signed

/s/ Frank Torti, M.D.
Dr. Frank Torti, M.D.

/s/ William H. Collier
William H. Collier

/s/ David C. Hastings
David C. Hastings

/s/ Daniel Burgess
Daniel Burgess

/s/ Richard C. Henriques
Richard C. Henriques

/s/ Keith Manchester, M.D.
Keith Manchester, M.D.

/s/ Eric Venker, M.D., PharmD
Eric Venker, M.D., PharmD

/s/ James Meyers
James Meyers

/s/ Andrew Cheng, M.D., Ph. D
Andrew Cheng, M.D., Ph. D

Director (Chairman)

President and Chief Executive Officer and Director
(Principal Executive Officer)

Chief Financial Officer
(Principal Financial Officer and Principal Accounting Officer)

Director

Director

Director

Director

Director

Director

98

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DESCRIPTION OF THE REGISTRANT’S SECURITIES
REGISTERED PURSUANT TO SECTION 12 OF THE
SECURITIES EXCHANGE ACT OF 1934

Exhibit 4.2 

As of the date of the Annual Report on Form 10-K of which this exhibit forms a part, the only class of securities of Arbutus Biopharma Corporation
(“we,” “us” and “our”) registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), is our common shares,
without par value.

CAPITAL STOCK

The  following  description  of  our  capital  stock  summarizes  provisions  of  our  Notice  of  Articles  and  Articles,  as  amended,  or  our  Articles,  the
Investment Canada Act (Canada), the Competition Act (Canada) and the Business Corporations Act (British Columbia). The following description does not
purport to be complete and is subject to, and qualified in its entierty by, our Articles, which are incorporated by reference as exhibits to the Annual Report
on  Form  10-K  of  which  this  exhibit  is  a  part,  and  to  the  applicable  provisions  of  the  Investment  Canada  Act,  the  Competition  Act  and  the  Business
Corporations Act.

Authorized and Outstanding Shares

Our authorized share capital consists of (i) an unlimited number of common shares, without par value, (ii) an unlimited number of preferred shares, without
par  value,  and  (iii)  1,164,000  Series  A  Participating  Convertible  Preferred  Shares.  As  of  March  3,  2021  there  were  (a)  95,583,915  common  shares
outstanding and (b) 1,164,000 Series A Participating Convertible Preferred Shares outstanding. None of our common shares or preferred shares are held by
us or on behalf of us.

Voting Rights

The holders of our common shares are entitled to receive notice of any meeting of our shareholders and to attend and vote thereat, except those meetings at
which only the holders of shares of another class or of a particular series are entitled to vote. Each common share entitles its holder to one vote. There are
no cumulative voting rights.

Dividends

Subject to the rights of the holders of preferred shares, the holders of common shares are entitled to receive on a pro rata basis such dividends as our Board
of Directors may declare out of funds legally available for payment of dividends.

Liquidation Rights

In the event of the dissolution, liquidation, winding-up or other distribution of our assets, those holders are entitled to receive on a pro rata basis all of our
assets remaining after payment of all of our liabilities, subject to the rights of holders of preferred shares.

Other Rights and Preferences.

The terms of our common shares do not include any preemptive, conversion or subscription rights, nor any redemption or sinking fund provisions. The
common shares are not subject to future calls or assessments by us.

Series A Participating Convertible Preferred Shares

In  October  2017,  we  entered  into  a  subscription  agreement  with  Roivant  Sciences  Ltd.,  or  Roivant,  for  the  sale  of  1,164,000  Series  A  participating
convertible preferred shares, or the Preferred Shares, for gross proceeds of $116.4 million. These Preferred Shares are non-voting and accrue an 8.75% per
annum coupon in the form of additional Preferred Shares, compounded annually, until October 18, 2021, at which time all the Preferred Shares will be
subject to mandatory conversion into common shares (subject to limited exceptions in the event of certain fundamental corporate transactions relating to
our capital structure or assets, which would permit earlier conversion at Roivant’s option). The conversion price is $7.13 per share, which will result in the
Preferred Shares being converted into approximately 23 million common shares. After conversion of the

Preferred Shares into common shares, based on the number of common shares outstanding as of March 3, 2021, Roivant would hold approximately 33% of
our common shares. Roivant agreed to a four year lock-up period for this investment and its existing holdings in us. Roivant also agreed to a four year
standstill whereby Roivant will not acquire greater than 49.99% of our common shares or securities convertible into common shares. The initial investment
of  $50.0  million  closed  in  October  2017,  and  the  remaining  amount  of  $66.4  million  closed  in  January  2018  following  regulatory  and  shareholder
approvals.

Registration Rights

On January 11, 2015, we entered into an Agreement and Plan of Merger and Reorganization, or the Merger Agreement, with OnCore Biopharma, Inc., or
OnCore, pursuant to which OnCore became our wholly-owned subsidiary. In connection with the Merger Agreement, we entered into a Registration Rights
Agreement, or the Registration Rights Agreement, with certain of OnCore’s shareholders. On October 16, 2017, we entered into an Amending Agreement
pursuant to which the common shares underlying the Preferred Shares purchased by Roivant were included as registrable securities under the Registration
Rights Agreement.

Pursuant to the Registration Rights Agreement, certain holders of our common shares have registration rights. After registration of these common shares
pursuant to these rights, these shares will become freely tradable without restriction under the Securities Act. The registration rights will terminate with
respect  to  each  shareholder  on  the  date  on  which  such  shareholder  ceases  to  beneficially  own  more  than  three  percent  of  our  common  shares  then
outstanding, if such shares may be sold pursuant to Rule 144 of the Securities Act.

An  aggregate  of  approximately  42  million  common  shares  are  entitled  to  these  registration  rights,  including  approximately  23  million  common  shares
issuable upon conversion of the Preferred Shares.

Director Nomination Rights

Pursuant to the terms of the Amended and Restated Governance Agreement, dated October 16, 2017, between us and Roivant and Part 28 of our Articles,
for  so  long  as  Roivant  has  "beneficial  ownership"  (as  defined  pursuant  Rule  13d-3  under  the  Securities  Exchange  Act  of  1934,  as  amended,  or  the
Exchange Act), or Beneficial Ownership, or exercises control or direction over not less than:

•

•

•

thirty percent (30%) of our issued and outstanding common shares calculated on a partially diluted basis as of a particular date, Roivant has the
right  to  nominate  three  (3)  individuals  for  election  to  our  Board  of  Directors  at  each  shareholder  meeting,  one  (1)  of  whom  must  satisfy  the
applicable independence standards;
twenty percent (20%) of our issued and outstanding common shares calculated on a partially diluted basis as of a particular date, Roivant has the
right to nominate two (2) individuals for election to our Board of Directors at each shareholder meeting; and
ten percent (10%) of our issued and outstanding common shares calculated on a partially diluted basis as of a particular date, Roivant has the right
to nominate one (1) individual for election to our Board of Directors at each shareholder meeting.

Upon  Roivant  having  Beneficial  Ownership  or  exercising  control  or  direction  over  less  than  ten  percent  (10%)  of  our  outstanding  common  shares
calculated on a partially diluted basis as of a particular date, the nomination rights provided above will be of no further force and effect. The total number
of common shares underlying the Preferred Shares beneficially owned by Roivant are included in the Beneficial Ownership calculations described above.

Limitations to Control due to Certain Provisions of Canadian and British Columbian Law and our Articles

Unless such offer constitutes an exempt transaction, an offer made by a person, or an offeror, to acquire outstanding shares of a Canadian entity that, when
aggregated with the offeror’s holdings (and those of persons or companies acting jointly with the offeror), would constitute 20% or more of the outstanding
shares,  would  be  subject  to  the  take-over  provisions  of  Canadian  securities  laws.  The  foregoing  is  a  limited  and  general  summary  of  certain  aspects  of
applicable securities law in the provinces and territories of Canada, all in effect as of the date hereof.

In addition to the take-over bid requirements noted above, the acquisition of shares may trigger the application of additional statutory regimes including
amongst others, the Investment Canada Act (Canada) and the Competition Act (Canada).

As well, under the Business Corporations Act (British Columbia), unless otherwise stated in our Articles, certain corporate actions require the approval of a
special majority of shareholders, meaning holders of shares representing 66 2/3% of those

votes cast in respect of a shareholder vote addressing such matter. Those items requiring the approval of a special majority generally relate to fundamental
changes with respect to our business, and include amongst others, resolutions: (i) removing a director prior to the expiry of his or her term; (ii) altering our
Articles, (iii) approving an amalgamation; (iv) approving a plan of arrangement; and (v) providing for a sale of all or substantially all of our assets.

The Nasdaq Global Select Market

Our common shares are listed on the Nasdaq Global Select Market under the symbol “ABUS.”

Transfer Agent and Registrar

The transfer agent and registrar for our common shares is AST Trust Company (Canada).

Arbutus Biopharma Corporation

List of Subsidiaries

Arbutus Biopharma Inc.

Delaware, United States of America

Name

Jurisdiction

Exhibit 21.1 

 
 
 
Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

1. Registration  Statement  (Form  S-3  No.  333-248467)  pertaining  to  the  offering,  issuance  and  sale  of  up  to  $200,000,000  of  common  shares,

preferred shares, warrants, debt securities and units of Arbutus Biopharma Corporation,

2. Registration  Statement  (Form  S-3  No.  333-235674)  pertaining  to  the  offering,  issuance  and  sale  of  up  to  $150,000,000  of  common  shares,

preferred shares, warrants, debt securities and units of Arbutus Biopharma Corporation,

3. Registration Statement (Form S-8 No. 333-239407) pertaining to the Arbutus Biopharma Corporation 2016 Omnibus Share and Incentive Plan and

Arbutus Biopharma Corporation 2020 Employee Stock Purchase Plan,

4. Registration Statement (Form S-8 No. 333-233192) pertaining to the Inducement Stock Option Award of Arbutus Biopharma Corporation,

5. Registration Statement (Form S-8 No. 333-228919) pertaining to the Arbutus Biopharma Corporation 2011 Omnibus Share Compensation Plan,

6. Registration Statement (Form S-8 No. 333-212115) pertaining to the Arbutus Biopharma Corporation 2016 Omnibus Share and Incentive Plan,

7. Registration Statement (Form S-8 No. 333‑202762) pertaining to the OnCore Biopharma, Inc. 2014 Equity Incentive Plan, and

8. Registration Statement (Form S-8 No. 333-186185) pertaining to the Tekmira 2011 Omnibus Share Compensation Plan, the Tekmira Share Option

Plan and the Protiva 2000 Incentive Stock Option Plan,

of our report dated March 4, 2021, with respect to the consolidated financial statements of Arbutus Biopharma Corporation included in this Annual Report
(Form 10-K) of Arbutus Biopharma Corporation for the year ended December 31, 2020.

/s/ Ernst & Young LLP

Philadelphia, Pennsylvania
March 4, 2021

                
Exhibit 31.1

CERTIFICATION PURSUANT TO RULE 13a-14 AND 15d-14 OF THE SECURITIES

EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, William Collier, President and Chief Executive Officer of Arbutus Biopharma Corporation, certify that:

1.

I have reviewed this Form 10-K;

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 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 the 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 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 4, 2021

/s/ William Collier

Name: William Collier

Title: President and Chief Executive Officer
(Principal Executive Officer)

Exhibit 31.2

CERTIFICATION PURSUANT TO RULE 13a-14 AND 15d-14 OF THE SECURITIES

EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, David Hastings, Chief Financial Officer of Arbutus Biopharma Corporation, certify that:

1.

I have reviewed this Form 10-K;

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 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 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 4, 2021

/s/ David Hastings

Name: David Hastings

Title: Chief Financial Officer

(Principal Financial Officer)

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Arbutus Biopharma Corporation (the “Company”) on Form 10-K for the year ended December 31, 2020, as filed
with the Securities and Exchange Commission on the date hereof (the “Report”), I William Collier, President and Chief Executive Officer of the Company,
certify that to the best of 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 the operations of the

Company.

Date: March 4, 2021

/s/ William Collier

Name: William Collier

Title: President and Chief Executive Officer
(Principal Executive Officer)

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Arbutus Biopharma Corporation (the “Company”) on Form 10-K for the year ended December 31, 2020, as filed
with the Securities and Exchange Commission on the date hereof (the “Report”), I David Hastings, Chief Financial Officer of the Company, certify that to
the best of 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 the operations of the

Company.

Date: March 4, 2021

/s/ David Hastings

Name: David Hastings

Title: Chief Financial Officer

(Principal Financial Officer)