2021 ESG REPORT - Arena Pharmaceuticals, Inc.

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2021 ESG REPORT - Arena Pharmaceuticals, Inc.
2021 E SG   RE PO RT
2021 ESG REPORT - Arena Pharmaceuticals, Inc.
TAB LE O F CO NTE NTS

                                LETTER FROM OUR CEO                                   2

                                ABOUT US AND OUR APPROACH TO ESG                      3

                                GOVERNANCE AND LEADERSHIP                             4

                                GOVERNANCE OF ESG                                      4

                                BOARD DIVERSITY AND INDEPENDENCE                       5

                                BUSINESS ETHICS AND COMPLIANCE                         5

                                    Ethical Research                                   6

                                    Ethical Marketing                                  6

                                SUPPLY CHAIN MANAGEMENT AND HUMAN RIGHTS               7

                                    Human Rights and Environmental Considerations      8

                                    Oversight and Incident Response                    8

                                THE ARENA TEAM                                        9

                                INCLUSION, DIVERSITY, AND EQUITY AT ARENA             10

                                EMPLOYEE TRAINING AND DEVELOPMENT                     11

                                EMPLOYEE WELL-BEING, HEALTH, AND SAFETY               12

                                    Benefits                                          12

                                    Occupational Health and Safety                    12

                                    COVID-19 Response                                 12

                                SOCIAL RESPONSIBILITY                                 13

                                SAFETY OF CLINICAL TRIAL PARTICIPANTS                 13

                                PATIENT ADVOCACY, ACCESS, AND AFFORDABILITY           14

                                    Patient Advocacy                                  14

                                    Access and Affordability                          14

                                DRUG SAFETY                                           15

                                    Counterfeit Drugs                                 16

                                CUSTOMER PRIVACY AND DATA SECURITY                    16

                                CORPORATE PHILANTHROPY AND VOLUNTEERING               16

                                ENVIRONMENTAL MANAGEMENT                              17

                                FRAMEWORKS AND STANDARDS                              18

                                SUSTAINABILITY ACCOUNTING STANDARDS BOARD (SASB)      18

                                UNITED NATIONS SUSTAINABLE DEVELOPMENT GOALS (SDGS)   20

                                METHODOLOGY                                           21

                                FORWARD-LOOKING STATEMENTS                            21

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                           1
2021 ESG REPORT - Arena Pharmaceuticals, Inc.
LET TE R FRO M OU R CEO

                                                          Dear Stakeholders,

                                                          We are building a vibrant, sustainable enterprise with
                                                          the ultimate goal of delivering important medicines to
                                                          patients who need them. Ever mindful that this is not an
                                                          easy endeavor in an increasingly complex and challenging
                                                          external environment, our path requires a steadfast,
                                                          long-term commitment from our management team, our
                                                          employees, and our Board of Directors.

                                                          In building for the long term, we recognize that stewardship of resources;
                                                          measured management of risks and rewards; and a service-first approach to
                                                          our employees, patients, and the communities in which we operate are corner-
                                                          stones of our success. This updated ESG report, our second annual, outlines
                                                          our evolving approach to managing environmental and social risks and captur-
                                                          ing associated opportunities. It is another step in enhancing our disclosures
                                                          relative to the Environmental, Social, and Governance (ESG) factors most
                                                          relevant to the long-term growth and success of our business. We believe our
                                                          efforts here will result in a strategic advantage for Arena.

                                                          In late 2019, we articulated our corporate aspiration with the statement Care
                                                          More. Act Differently. This aspiration was designed to help guide our deci-
                                                          sion-making as we move from the clinical stage to the commercial stage as an
                                                          organization.

                                                          In 2020, I’m proud of how this mission was embodied in our response to the
                                                          global COVID-19 pandemic. We quickly acted to adapt our organization to the
                                                          impact; we continued to care and support each other and our communities;
                                                          and we are keeping an intense focus on the safety of the patients, nurses,
                                                          and physicians who participate in our ongoing clinical studies globally. As
                                                          an example, we established a support program to aid employees with chil-
                                                          dren learning from home. As we prepare for commercialization, we have also
                                                          engaged a broad range of stakeholders to understand how we might deliver
                                                          important medicines most effectively to the patients who need them.

                                                          Our Board of Directors and our whole team see our focus on ESG as a journey
                                                          of continuous improvement as we assess our approach, monitor our impact,
                                                          and build toward the future. We look forward to sharing our progress with you
                                                          in this report and over the years to come.

                                                          As we learn, we invite your feedback and ideas to ESG@arenapharm.com.

                                                          Amit D. Munshi
                                                          Director, President, and Chief Executive Officer
A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                          2
2021 ESG REPORT - Arena Pharmaceuticals, Inc.
ABOUT US AN D OU R APPROACH TO E SG

                                We are a biopharmaceutical company focused on delivering
                                novel, important medicines with optimized pharmacology
                                and pharmacokinetics to patients globally. Our internally
                                developed pipeline includes multiple potentially first- or
                                best-in-class assets with broad clinical utility. In a rapidly
                                changing global market, we work with a sense of urgency
                                every day to understand the needs of all our stakeholders,
                                identify bold and sometimes disruptive ideas to get medi-
                                cines to patients, and relentlessly execute until it’s done.

                                Our team has a singular purpose: to deliver important medicines to patients.
                                Our objective is to build a durable and sustainable global company to last for
                                generations through applying a multi-year horizon and delivering on our com-
                                mitment to our patients, community, environment, and shareholders.

                                We are committed to creating value for our shareholders through careful
                                management of resources against focused priorities. We strongly believe ESG
                                principles support long-term value creation, and throughout this report we
                                have laid out our approach to managing risks and taking advantage of oppor-
                                tunities in key ESG areas — the areas that are most relevant to the long-term
                                sustainability of our organization.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                 3
2021 ESG REPORT - Arena Pharmaceuticals, Inc.
G OVE RNAN CE AN D LE AD E RS H I P

GOVERNANCE OF ESG

We have clear oversight of ESG established at the Board level. The responsibilities of the
Corporate Governance and Nominating Committee include oversight and review of the
company’s ESG strategy, initiatives, and policies as well as communications about these
initiatives with employees, investors, and other stakeholders. The committee reports to the
Board on ESG matters.

We have also established the management-level ESG Working Group led by a member of our Investor Relations orga-
nization. This group is charged with developing, executing, and monitoring progress against ongoing strategies,
activities, and policies that advance our environmental and social capabilities.

Our 2021 annual corporate goals include ESG initiatives. These corporate goals will be used by the Compensation
Committee of our Board of Directors to evaluate executives’ performance and payments for 2021 under our Annual
Incentive Plan.

    Board of Directors oversees all policies                                     BOARD OF
    and strategy.                                                                DIRECTORS

    ESG oversight responsibility was
                                                                                 CORPORATE
    added to the charter of the Corporate
                                                                     AUDIT     GOVERNANCE AND   COMPENSATION
    Governance and Nominating Committee;
                                                                   COMMITTEE     NOMINATING      COMMITTEE
    this committee oversees ESG initiatives
                                                                                 COMMITTEE
    at the board level.

    The Executive Team updates the
    Corporate Governance and Nominating
    Committee on the progress of the                                           EXECUTIVE TEAM
    ESG Working Group and oversees
    their work.

    The ESG Working Group is responsible
                                                                                ESG WORKING       EXTERNAL
    for execution of the strategy and
                                                                                   GROUP        STAKEHOLDERS
    recommendations on how to improve.

                                                                                KEY INTERNAL
    Subject-matter experts are responsible
                                                                               STAKEHOLDERS /
    for implementation of their respective
                                                                               SUBJECT-MATTER
    areas.
                                                                                  EXPERTS

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2021 ESG REPORT - Arena Pharmaceuticals, Inc.
BOARD DIVERSITY AND INDEPENDENCE                                                 We operate in a heavily regulated industry and are subject
                                                                                 to a variety of legal and ethical standards. We are com-
                             Our Board of Directors currently                    mitted to operating in compliance with these laws and
                             consists of ten directors, with 40%                 standards, and our compliance program is built on appli-
                             identifying as female.                              cable regulations and guidelines from relevant governing
                                                                                 agencies in the countries and regions where we operate,
                   It is our policy that at least two-thirds                     including the US Department of Justice, the Office of
                   of our Board members be independent                           Inspector General Compliance Program Guidance for
directors and that all of the Compensation Committee                             Pharmaceutical Manufacturers, and the UK Ministry of
members be independent directors. We separate the roles                          Justice’s adequate procedures.
of Chairperson of the Board and Chief Executive Officer,
with one of the independent directors appointed as Chair.                        Our policy is to comply with all laws applicable to
Director tenure varies from less than one year to more                           our business, including but not limited to healthcare
than 15 years.                                                                   regulatory, employment and workplace, securities, envi-
                                                                                 ronmental, and antitrust laws and laws relating to corrupt
For more information about our Board, please see our                             practices, such as the US Foreign Corrupt Practices Act
latest proxy statement.                                                          (FCPA).

                                                                                 Our Global Compliance Program is a partnership with
BUSINESS ETHICS AND COMPLIANCE
                                                                                 business units and consists of six elements: leadership;
                                                                                 standards and controls, policies, and procedures; risk
Our enterprise-wide Compliance Committee oversees
                                                                                 assessment and mitigation; oversight: investigations,
policy governance, standards, and controls. It has
                                                                                 auditing, and monitoring; support and guidance; and train-
cross-functional representation, including representatives
                                                                                 ing and communication.
from committees across the organization that have a
compliance function or responsibility, such as the Quality
Management Committee. The Compliance Committee
meets quarterly, is chaired by the chief compliance officer,
and reports to the Executive Team and the Audit Commit-
tee of the Board on a regular basis.

                     GLOBAL COMPLIANCE PROGRAM AT ARENA — KEY AREAS AND FOCUS

                                                                                 STANDARDS
                                                                                 AND CONTROLS,
                                                                   LEADERSHIP
                                                                                 POLICIES AND
                                                                                 PROCEDURES

                                                                          PARTNERSHIP   RISK
                                                       TRAINING AND        PREVENTION   ASSESSMENT
                                                       COMMUNICATION       MITIGATION   AND MITIGATION

                                                                                 OVERSIGHT:
                                                                   SUPPORT AND   INVESTIGATIONS,
                                                                   GUIDANCE      AUDITING AND
                                                                                 MONITORING

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                              5
2021 ESG REPORT - Arena Pharmaceuticals, Inc.
More than simply complying with laws and regulations, we also strive to conduct our business with high ethical stan-
dards. Our Code of Business Conduct and Ethics (code of conduct) reflects the business practices and principles of
behavior that support this commitment. We expect every employee, officer, and director to read and understand our
code of conduct and abide by it. In addition, we expect our suppliers, business partners, and other third parties with
whom we conduct business to adhere to behavior consistent with the spirit of the code of conduct and applicable laws
and regulations when working on behalf of Arena.

                                           TOPICS COVERED IN OUR CODE OF CONDUCT INCLUDE:

        •   Honest and Ethical Conduct                             •   Fair Dealing
        •   Conducting Research with Integrity                     •   Gifts and Entertainment
        •   Workplace Environment                                  •   Confidentiality
        •   Insider Trading                                        •   Environmental Compliance
        •   Conflicts of Interest                                  •   Political Contributions

Each employee annually goes through web-based code of conduct training, including an assessment and written
acknowledgment as well as separate anti-bribery training.

To help facilitate the reporting of concerns, we have established a third-party whistleblower hotline that our employees,
customers, vendors, and other third parties may use. The hotline is operated on our behalf by an independent firm,
and employees can submit complaints without fear of dismissal or retaliation and may make their submission anony-
mously. We also encourage feedback through “open-door” policies by leadership as well as anonymous pulse surveys.
Please see our Policy on Filing, Receipt, and Treatment of Complaints for additional information on the receipt and
treatment of reported concerns.

In 2020, Arena had no monetary losses as a result of legal proceedings associated with clinical trials in developing
countries or as a result of legal proceedings associated with corruption and bribery.

Ethical Research

We must comply with all applicable laws and regulations governing the research, manufacturing, testing, review and
approval, shipment, storage, labeling, promotion, sales, marketing, and destruction of pharmaceutical products, includ-
ing as set forth by the US Food and Drug Administration (FDA), the Drug Enforcement Administration (DEA), the Federal
Trade Commission (FTC), state and local authorities, and, where appropriate, international laws.

In conducting studies and clinical trials of pharmaceutical products, we comply with rules governing human subject
protection, animal welfare, and public disclosure of clinical trials. Our commitment to develop and manufacture safe
and effective products and legally and ethically promote their benefits to patients and their providers requires full com-
pliance with all laws and regulations governing research, development, manufacturing, and sale of products. All clinical
trials are monitored and reviewed by institutional review boards (IRBs) or ethics committees, as appropriate.

Our research is primarily conducted on our behalf by third parties, and as part of our vendor management, we expect
compliance with applicable laws and regulations.

Ethical Marketing

The FDA regulates communication of information about prescription drugs in the United States, and it prohibits the
promotion of investigational drugs. Non-promotional communication about investigational drugs, such as presen-
tations at conferences and medical information letters, must comply with guidelines issued by the FDA for such

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purposes. Employee requirements for interactions with healthcare providers and organizations are specified in our
policies and procedures. In addition, the US federal healthcare program Anti-Kickback Statute and other similar inter-
national laws prohibit offering or giving anything of value to healthcare professionals or other persons with the intent
to influence or encourage the recipient to purchase, prescribe, or recommend any of our products. We are committed
to complying with these laws.

We are currently focused on research and development (i.e., pre-approval) activities and do not commercialize or mar-
ket any prescription drugs. Accordingly, we have comprehensive guidelines regarding communications and activities
for investigational drugs and investigational uses of approved drug products, and will be proactive about compliance
as we approach commercialization.

The Arena Medical, Legal, and Regulatory (MLR) Review Committee is a cross-functional committee consisting of rep-
resentatives from our medical, legal, and regulatory functions.

                                           THE PURPOSE OF THE MLR RE VIE W COMMIT TEE IS TO:

        • Review all promotional and educational materials
        • Provide guidance and assistance in ensuring compliance with applicable statutes, regulations, guidance
          documents, industry standards, and codes
        • Ensure compliance with our internal policies and procedures
        • Ensure all materials are approved prior to use

We also have a Publications Approval Committee, which provides final approval of all scientific publications in accor-
dance with our Scientific Publications Policy. The policy follows widely accepted external principles, including ICMJE,
and describes our practices for developing and publishing technical, scientific, and medical data and information in a
manner that ensures accuracy and completeness as well as ethical, transparent, and timely delivery. The policy covers
all scientific publications coming from Arena’s data-generating functions (e.g., research, non-clinical/clinical pharma-
cology, clinical development, medical affairs, health economics and outcomes research, commercial analytics) and all
employees and contractors in R&D, legal, and commercial analytics and dictates that all other data-generating func-
tions receive policy training.

SUPPLY CHAIN MANAGEMENT AND HUMAN RIGHTS

Arena engages contract manufacturing organizations (CMOs) to manufacture our investigational drug candidates.
We develop requests for proposals (RFPs) that include specific criteria that we consider when evaluating respondents
as part of our selection process. Selection criteria include equipment and staff capabilities, commercial production
capability, licenses and regulatory compliance history, environmental awareness, and compatibility with Arena quality
systems and philosophy. We perform site visits of CMOs under consideration as well as formal quality audits wherein
we assess systems, certifications, and processes before selecting a CMO as a partner.

In addition to scoring prospective vendor candidates across a variety of selection criteria, we thoroughly assess
company fit. At Arena, we view our external partners as part of our team and therefore take overall compatibility into
account in our selection process.

Because CMOs are critical to our business, our cross-functional selection process involves representatives from many
departments, including technical operations, quality, regulatory, finance, and legal. Once a proposed CMO partner is
vetted, it must still receive final approval by the Executive Team.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                           7
As per our Code of Conduct, purchases of products and services may only be made on the basis of quality, price, and
service and never on the basis of giving or receiving payments, gifts, entertainment, or favors.

                                                                   CMO SELECTION PROCESS

                                       CANDIDATE ID
                                                                     RFP AND     SCREENING
            NEEDS                         AND                                                  FINALIST SITE   SCORE AND
                                                                    PROPOSAL    CAPABILITIES
         ASSESSMENT                    PRELIMINARY                                                VISITS         SELECT
                                                                      REVIEW   PRESENTATIONS
                                         SCREEN

Because we view our external vendors and stakeholders as an extension of our business, we take the vendor man-
agement process very seriously. Following approval, we work diligently to establish and maintain not just a working
relationship but a true partnership with our vendors.

Our CMO vendor management process includes developing relationships with our vendors built on two-way communi-
cation and trust. We conduct weekly meetings with CMO vendors to review and discuss program progress and resolve
any operational issues, deviations, or trends. To calibrate investigation standards and expectations, we coordinate joint
training sessions between us and our vendors.

Prior to conduct of current good manufacturing practices (cGMP) activities, formal quality agreements are instituted
to clearly specify the roles and responsibilities of both us and the CMO vendor. These living documents may be altered
as the relationship matures to ensure our ongoing commitment to quality and practice of current industry standards.
We conduct in-person or virtual site visits where operations occur to continue on-site collaboration, perform peri-
odic virtual or on-site audits of facilities, and create annual audit plans. CMO vendor performance is evaluated with a
cadence appropriate for the stage of product development or commercialization. Audit findings are presented using a
risk-based scorecard, with feedback provided to the vendor based on the scorecard results.

Human Rights and Environmental Considerations

Throughout our engagement with manufacturing and other supply chain vendors, we monitor their environmental
impact as well as their commitment to human rights.

Our primary manufacturers are located within the US, Europe, and Canada, where human rights regulation tends to be
mature and enforced. Our Human Rights Policy addresses our support for the principles outlined in the United Nations’
Universal Declaration of Human Rights (UDHR) and Guiding Principles on Business and Human Rights. We strive to
uphold responsible human rights practices in all our business activities, including our supply chain.

The environmental impact of drug substances is considered in the CMO selection process, and we aim to select
vendors that have environmentally responsible procedures in place for both handling waste solvents and the chemical
composition of the substance itself. For instance, when choosing among catalysts, we select the more environmen-
tally friendly option. Our external partners are often established companies that support initiatives to enhance the
local community and protect the environment.

Oversight and Incident Response

The quality and technical operations departments have collective oversight over manufacturing and supply chain
vendor management, which includes any potential incidents within the supply chain. In the event an incident occurs,
we put together a formal Material Review Board (MRB) that involves subject-matter experts across quality, technical
operations, and the respective CMO. When conducting a technical investigation into a specific incident, we identify the
source of the problem and assess both the level of severity and any potential impacts on future patients or the general
quality of the product. Depending on severity, the incident could be raised to first the Executive Team and then the
Board. We also comply with any legal and regulatory requirements regarding quality reporting.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                           8
TH E ARE NA TE AM

Our leadership and employees are guided by our purpose — to deliver important medicines
and live by a simple statement that defines how we approach everything we do: Care More.
Act Differently. We are guided both by our purpose and through the lens of our values: Put
People First, Be Curious, Think Disruptive, and Be Daring.

                    PUT PEOPLE FIRST.                                                   BE CURIOUS.
                    We are more than the sum of our parts — we                          Change is rapid — we dig deeper, understand
                    take care of each other and revel in the journey.                   more, and build critical connections with all our
                                                                                        stakeholders.

                    THINK DISRUPTIVE.                                                    BE DARING.
                    We think big; craft bold, audacious plans; and                       We are relentless in our execution. We take
                    change the game.                                                     calculated risks. Every minute matters.

We actively seek to inspire and cultivate a vibrant, thriv-                    As of December 31, 2020, we employ 363 full- and part-
ing, and resilient culture that engenders a sense of                           time employees located primarily in our three hubs — San
purpose, community, connection, and gratitude. This all                        Diego, California; Boston, Massachusetts; and Zug, Swit-
operates within a framework of strong governance and                           zerland — as well as home-based employees across the
risk management.                                                               US and Europe. In addition to our employees, we engage
                                                                               consultants, independent contractors, and temporary
Our human capital practices and commitments are incor-                         employees to provide flexibility in support of our business
porated into our annual corporate goals and corporate                          execution and objectives.
performance metrics. In 2021, we added a specific cor-
porate objective related to diversity, equity, and inclusion
(DEI) to our ESG initiatives.

ARENA OFFICE LOCATIONS— NUMBER OF EMPLOYEES

  LOCATION                                      TOTAL

  BOSTON, MA                                       29
                                                                                         ZUG
  SAN DIEGO, CA                                   252                          BOSTON
                                                                   SAN DIEGO
  US-REMOTE: HOME-BASED                            43
  ZUG SWITZERLAND                                  39
  GRAND TOTAL                                     363

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                            9
INCLUSION, DIVERSITY, AND EQUITY                                                 meaningful diversity, equity, and inclusion topics and
AT ARENA                                                                         activities.

                   Care More. Act Differently. is more than                      To frame this work, we are leveraging industry and
                   a tagline. It encompasses who we are                          geographical benchmarking to guide and measure our
                   as an organization. We strive to make                         progress. We will drive awareness and accountability
                   Arena a place where differences are                           by prioritizing diversity as part of our company goals.
                   valued and embraced so that employ-                           Actions include examination of our internal policies
                   ees can bring their whole authentic                           and practices, development of new programs such as
selves to work, thereby enabling the highest levels of                           peer mentoring and learning sessions, broadening our
contribution.                                                                    recruiting efforts to ensure diverse candidate pools for
                                                                                 open roles and internships. We named a dedicated lead
A new cross-functional employee action committee,                                to spearhead our strategy and provide oversight of the
IDE@A (Inclusion, Diversity, and Equity at Arena), was                           IDE@A program. Additionally, as part of our education
charged with developing and driving our enterprise                               and academia outreach, we launched partnerships with
diversity and inclusion strategy. We are committed to                            various universities and organizations such as Charles R.
strengthening our diversity and inclusion initiatives                            Drew University of Medicine and Science, MANA de San
by promoting sharing, learning, and engagement in                                Diego, and minority student organizations at predomi-
                                                                                 nately white institutions.

              ARENA EMPLOYEES                                                                 ARENA EMPLOYEES
      GLOBAL GENDER DIVERSITY (12/31/20)                                                US ETHNIC DIVERSITY (12/31/20*)

                                                                                                                       28%
                         35%

                                                                                                 57%
                                                                   65%                                                                3%
                                                                                                                       8%

                                                                                                                                      1%
                                                                                                                                      3%

      GENDER                                                             TOTAL    ETHNICITY AND RACE                                TOTAL

         FEMALE                                                          234         ASIAN                                      58
         MALE                                                            129        BLACK OR AFRICAN AMERICAN                    6
      GRAND TOTAL                                                        363        HISPANIC OR LATINO                          16
                                                                                    NATIVE HAWAIIAN OR OTHER PACIFIC ISLANDER    2
                                                                                    TWO OR MORE RACES (NOT HISPANIC OR LATINO)   7
                                                                                    WHITE                                      116
                                                                                  GRAND TOTAL                                 205
                                                                                 *63% of US employees self-reporting

          FOR VICE PRESIDENTS AND ABOVE OUR TEAM IS 38% FEMALE AND 23% SELF-REPORT AS NON-CAUCASIAN.
                                                                                                                                        1

                                                                                                                             Data as of March 2021
                                                                                                                             1

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Arena is committed to ensuring its total rewards policies                        platform. LinkedIn Learning provides our employees with
and practices are fair and equitable, regardless of an                           a user-friendly platform of thousands of courses on a vast
individual employee’s gender, ethnicity, or age. We believe                      range of topics. Employees can access courses on any
this fair and equitable approach is vital to building and                        topic of interest at any time, including courses that pro-
maintaining a culture of organizational confidence and                           vide them with continuing education units to support their
trust. We also believe it is an essential element in recruit-                    professional accreditations. The talent development team
ing a diverse workforce and the best talent in the industry.                     also curates themed content and learning paths for the
To that end, every compensation decision is reviewed                             entire organization based on the insights we have gath-
by various members of the human capital team to ensure                           ered from employees, leaders, and members of the human
that implicit bias is not a factor in making human resources                     capital team regarding development needs.
decisions and that similarly situated employees across the
organization are treated fairly & equitably. This approach                       LinkedIn Learning was launched in January 2021, and the
is primarily applied to actions involving base salary, annual                    talent development team is launching learner engage-
bonuses, promotions, and long-term incentive awards.                             ments on a monthly basis. Within the first two months,
                                                                                 we surpassed the best-in-class account activation rate by
Employee Engagement                                                              nearly 100%, and we continue to see growth in on-demand
                                                                                 learning consumption. The talent development team is
Being proactive and creating a safe place for our employ-                        working to keep our learners engaged on the platform
ees to share feedback is part of our culture. We use pulse                       with featured content and supporting materials such as
surveys to gather feedback and are diligent about sharing                        individual development plan templates.
the insights with employees at All Staff meetings in order
to create two-way communication. We want all team                                LinkedIn Learning provides an excellent supplement to
members to know we are listening and genuinely care                              our previously existing function-specific and onboard-
about providing the best possible work environment and                           ing training. When new employees join the organization,
culture. We also have regular, global all-staff sessions                         our onboarding process ensures that they are provided
with open anonymous Q&A sessions to address current                              with information and training on multiple topics such as
issues and updates within the organization.                                      information technology, environmental health and safety,
                                                                                 company information, corporate compliance, quality
EMPLOYEE TRAINING AND DEVELOPMENT                                                assurance, and learning and development.

                     We know our success is anchored in                          The broader talent and organizational effectiveness team
                     our ability to recruit and retain talented,                 has also invested in the Korn Ferry Competency Profile
                     highly skilled team members. We are                         Manager platform to introduce research-based success
                     committed to actively providing all                         profiles, job descriptions, and interview guides into our
                     employees with developmental oppor-                         employee lifecycle. We utilize success profiles to generate
                     tunities that will help them continue to                    job descriptions and interview guides and support the
grow their capabilities and feel engaged in their career at                      hiring process. The use of success profiles directly sup-
Arena. In 2020, we established a talent development team                         ports strategic employee development and succession
to prioritize learning and development. The talent devel-                        planning, establishing a platform with immense potential
opment team is actively focusing on a holistic employee                          to enhance our talent practices in the years to come.
development strategy and ensuring that we have the
infrastructure in place to support it.                                           To measure our ability to effectively recruit, develop, and
                                                                                 retain our talent, one metric we track is our voluntary turn-
As one example, we have provided accessible and on-de-                           over rate. As our organization grows, we’re getting closer
mand learning to all employees via the LinkedIn Learning                         to the industry average for turnover.

                                 YEAR                          TOTAL EMPLOYEES           VOLUNTARY TURNOVER RATE

                                 2018                                    159                                    7.9%
                                 2019                                    194                                    5.6%
                                 2020                                    363                                   11.4%
A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                            11
EMPLOYEE WELL-BEING, HEALTH,                                                  work-life balance, we offer wellness programs, flexible
AND SAFETY                                                                    no-meeting Fridays, and a work-from-home stipend.

Benefits                                                                      To read more about our benefits, see our careers website.

We believe our employees should have a financial stake                        Occupational Health and Safety
in our company’s success to align their interests with
our shareholders’ interests. In that vein, we provide                         We are committed to providing a healthy and safe work
equity awards to all employees when they are hired and                        environment for our employees, partners, and consul-
additional annual grants to attract and retain a talented                     tants. Our Occupational Health and Safety (OH&S) Policy
workforce. Our employee stock purchase plan (ESPP)                            covers our OH&S practices. We have also adopted an
allows eligible employees to acquire an ownership inter-                      emergency action plan (EAP) that follows the guidelines
est at a discount.                                                            outlined by the Occupational Safety and Health Adminis-
                                                                              tration (OSHA).
We offer a robust benefits package that includes medical,
dental, vision, and prescription drug coverage; employee                      All employees are required to comply with our policies
assistance; PTO and other flexible time off; retirement                       and practices on health and safety, including those
savings; and other benefit programs to enhance our                            outlined in the injury and illness prevention plan (IIPP).
employees’ well-being. We provide sick time, company                          New employee safety orientations are held regularly to
holidays, and two week-long paid breaks during summer                         ensure that new employees are aware of and comply with
and the week between Christmas and New Year’s. Our                            our health and safety policies and practices, including
three-month Paid Family Leave (PFL) Policy allows time                        the IIPP and all other applicable laws and regulations.
for new parents to bond with their child or to be a care-                     We plan to align with the ISO 45001 standards for OH&S
giver for a seriously ill family member. To further promote                   management systems.

OCCUPATIONAL HEALTH & SAFETY (OH&S) IN                                        2018, 2019, 2020

  0
  Reports of
                                        .00
                                        Recordable
                                                                   .00
                                                                   Near-Miss Rate
                                                                                          0
                                                                                          Employee Time Lost
                                                                                                                   0
                                                                                                                   OH&S Deaths
  OH&S Issues                           Incident Rate                                     for OH&S Issues

COVID-19 Response

As the pandemic started to unfold in early February 2020, we assembled a COVID-19 response team that included
executive leadership. We quickly moved to a work-from-home mandate and adopted a flexible work schedule. To allow
employees to work from home seamlessly, we provided the necessary technology and developed an internal advisory
committee to identify support opportunities for employees working from home and homeschooling children. Through-
out the year, we engaged employees through regular pulse surveys. In response to employee feedback and as part of
our commitment to supporting our employees and families in meaningful ways throughout the pandemic, we put in
place the following programs:

    • Work-from-home stipend: Provided $25 per month for all employees whose jobs are not regularly remote
    • Caregiver resources: Implemented Helpr caregiver support app for subsidized virtual academic assistance with
      tutors and teachers and backup childcare support for families
    • Biometrics: Offered multiple choices for administering biometrics, including home test kits, and multiple places
      to get flu shots

Thus far we have been able to navigate the pandemic with focus, purpose, and compassion, resulting in strong produc-
tivity, high spirits and commitment, and a deepening of our cultural currency.
A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                        12
SOCIAL RE S PO N S I B I LIT Y

Arena is committed to using safer, smarter, and more sustainable business practices. We
look for innovative methods to improve patient and participant health, operate responsibly
for our stakeholders, and place safety and quality above all else.

SAFETY OF CLINICAL TRIAL                                               are shifting to a risk-based monitoring strategy in which
PARTICIPANTS                                                           data related to quality, efficacy, and safety are prioritized
                                                                       in their review. We comply with all relevant registration
                      We rely on external third parties to             and results posting obligations required by laws and/or
                      execute our clinical trials and preclini-        regulations.
                      cal studies. These third parties include
                      laboratories, clinical research orga-            Ethical Standards
                      nizations (CROs), specialty vendors,
                      and manufacturers. We also engage                To ensure the implementation of ethical clinical trials,
clinical trial sites and investigators to recruit clinical trial       Arena refers to all guidance put forth by the Declaration of
participants. Our third-party vendor management and                    Helsinki and the International Council for Harmonisation
our clinical trials follow a portfolio of scientifically sound         of Technical Requirements for Pharmaceuticals for
standard operating procedures (SOPs) that protects par-                Human Use (ICH). Our research is performed by part-
ticipant safety above all.                                             ners, and we require them to operate in accordance with
                                                                       standard research practices established by the National
The FDA and other state and country regulatory agencies                Institutes of Health (NIH).
impose substantial requirements for the preclinical devel-
opment, clinical development, and pre-marketing approval               Diversity, Equity, and Inclusion within Clinical
of pharmaceutical products. Our clinical trials must sat-              Trials
isfy extensive good clinical practices (GCPs) as set forth
by the FDA and must adhere to regulations for informed                 We consider a wide-ranging population for participation
consent and privacy of individually identifiable informa-              in our clinical studies, using recruitment vendors, digital
tion. As the sponsor, we are responsible for ensuring that             media, and participant advocacy groups. We recognize
each of our clinical trials is conducted in compliance with            the importance of diversity and inclusion within clinical
these regulations and quality standards.                               trials, including to ensure results are translatable to the
                                                                       broad population who may be prescribed the drug. We
Risk-Based Monitoring                                                  have launched a taskforce called Building Trust in the
                                                                       Medical Establishment as part of our larger DEI initiative,
In partnership with our CROs and CMOs, we monitor every                IDE@A. Throughout 2021, we will explore several avenues
clinical study on an ongoing basis, tracking every partici-            to expand on our commitment to diversity within the
pant from entry into the study, throughout the duration of             clinical environment, including increasing the number of
participation, and until discontinuation. This is achieved             participants from diverse backgrounds, engaging ven-
through reviewing participant profiles, monitoring par-                dors with databases specifically looking at diversity for
ticipant visits, and tracking any major or minor protocol              participant referrals, and expanding our work with patient
deviations. We ensure all clinical study-mandated assess-              advocacy programs.
ments are performed according to the highest levels of
safety protocols. Additionally, some of our clinical teams

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                   13
PATIENT ADVOCACY, ACCESS, AND                                               Access and Affordability
AFFORDABILITY
                                                                            Although we are still in the clinical development stage for
                                                         Patient Advocacy   all of our therapies, Arena believes patients need better
                                                                            access to high-quality and affordable medicines. We
                                     Arena supports                         strive to improve health outcomes globally with goals of
                                     patient advocacy at                    delivering important and affordable medicines to those
                                     all levels. Our advo-                  in need. For more details on this policy, please see our
                                     cacy platform, Arena                   Commitment to Access to Medicines Policy.
of Care, launched in early 2020 and is focused on collabo-
rating with external organizations to create vibrant futures                As a pharmaceutical company with lots of growth ahead
for patients around the world through programming and                       of us, we are proud of our innovative thinking in influenc-
educational opportunities. Our Arena of Care Patient                        ing the quality of care patients receive. We have launched
Council in Inflammatory Bowel Disease (IBD) represents                      several key projects and partnerships with health sys-
a diverse group of people who live with IBD. Diversity is                   tems, pharmacy benefit managers (PBMs), and large
a critical component we consider when assessing mem-                        organizations supporting both physician and patient
bership to the council. We recognize the lack of equity in                  advocacy in the ulcerative colitis community. These
access to healthcare and do our best to involve a range of                  partnerships will help us identify high-risk or undertreated
patients in the conversation, especially those who may be                   patient populations, design risk-sharing agreements, and
underserved. Our inaugural Arena of Care Patient Council                    reduce total cost of care. As a core foundation, we are
builds on this idea, with members expressing their desire                   building a platform that is value-based and incorporates
to work collaboratively and across advocacy groups to                       the impact of a drug in an innovative way.
identify and develop outreach for under-represented, vul-
nerable populations with unique cultural considerations.                    As we look to the future, we plan on utilizing artificial
As community leaders, they are facilitators and con-                        intelligence (AI) to deepen the understanding of the
nectors to patient populations and can be leveraged to                      causal relationships with risk factors and cost drivers in
provide and share insightful peer information to execute                    ulcerative colitis patients. Understanding this relationship
actionable initiatives.                                                     will allow us to build value-based pricing and contracting
                                                                            strategies.
Lyfebulb Partnership
                                                                            We’ve also launched a multi-stakeholder consortium
We are especially proud of our work with an organization                    to address concerns and challenges facing innovative
called Lyfebulb, which hosts an Innovation Challenge that                   treatments for inflammatory bowel disease (IBD). Our
is open to patient entrepreneurs with a goal of creating                    framework for advance payment and risk sharing models
solutions beyond therapy to help address challenges and                     is positioning us as a thought leader in this space. We will
improve experiences for people affected by a particu-                       address how to assess the efficacy, value, cost, benefit,
lar disease. Through the Innovation Challenge, patients                     and sustainability of technologies in the health system
themselves provide ideas for innovation within the care                     to develop a shared value framework for IBD across
and treatment of their own disease. Arena helps fund                        stakeholders.
the innovations that result from the Lyfebulb Innovation
Challenge, demonstrating our commitment to and support                      We are also involved with integrated delivery net-
of our patients and their ideas. We are reimagining how to                  works (IDNs) and actively participate in market access
work in service of our patients, which starts with listening                conferences.
and learning from those whose lives are most affected.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                      14
DRUG SAFETY

We are currently focused on research and development activities and do not commercialize or market any prescription
drug products. We follow the guidelines for communications about investigational drugs, which prohibit the promotion
of an investigational drug prior to FDA approval.

We and our collaborators are subject to significant governmental regulation. We have a quality department and a
quality management system along with mandatory training on SOPs across the company to help us meet extensive US
and foreign regulations focused on quality and safety. More specifically, the processes set forth by the International
Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) and the FDA guide
everything we do, including safety monitoring for any adverse events and complying with reporting requirements.

The quality department’s role is first and foremost patient safety. We protect patients by assuring compliance and
oversight in three areas of good practice (GxP) governed by various regulations:

    1.                                                             2.                                     3.
    GOOD L ABOR ATORY                                              GOOD CLINICAL                          CURRENT GOOD
    PR ACTICE (GLP)                                                PR ACTICE (GCP)                        MANUFACTURING
                                                                                                          PR ACTICE (CGMP)
    A quality system intended to                                   A standard for the design,
    assure the quality and integrity of                            conduct, performance, monitoring,      The quality system that ensures
    non-clinical laboratory studies.                               auditing, recording, analyses, and     products are consistently produced
    GLP guidelines regulate the                                    reporting of clinical studies that     and controlled in accordance with
    organization, workflow, and                                    provides assurance that the data       the quality standards appropriate to
    conditions under which non-clinical                            and reported results are credible      their intended use.
    health and environmental safety                                and accurate and that the rights,
    studies are planned, performed,                                integrity, and confidentiality of
    monitored, recorded, reported,                                 study participants are protected.
    and archived. The aim of GLP is to
    improve the quality and reliability of
    test data.

While we do not currently commercialize or market any prescription drug products, we are building out capabilities
and processes to do so in the near term, continuing to place quality and product safety at the forefront. Our intent is
compliance with both national and international regulatory requirements and ensuring robust product recall, product
complaint, and customer request capabilities.

Our quality department manages oversight of GxPs and is organized in four distinct teams:

                                                                    QA LEADERSHIP TEAM

                                                                             VICE PRESIDENT
                                                                                   OF
                                                                                QUALITY
                                                                               ASSURANCE

                                                                                          COMPUTER
                                       GCP/GLP                       QUALITY                                 GMP
                                                                                           SYSTEMS
                                     COMPLIANCE                      SYSTEMS                              COMPLIANCE
                                                                                       VALIDATION (CSV)

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                                 15
Counterfeit Drugs                                                  We have mandatory cybersecurity training for all new
                                                                   employees as well as a quarterly training program for all
Although Arena is not currently at the commercializa-              employees. We have also implemented phishing testing
tion stage, we are already taking steps to implement               across the organization to further increase employee
anti-counterfeiting measures throughout our operations.            cybersecurity awareness.
The contract manufacturing organizations (CMOs) we
work with are equipped to provide globally compliant seri-         In 2021, we are moving forward with our plan to align with
alization codes to track commercial product and protect            the HITRUST framework, which has established controls
against counterfeiting activity. We recognize that industry        that align to the globally recognized frameworks men-
standards and trends in this area are constantly evolving          tioned above. We will work with an external vendor to
and will continue to monitor best practices.                       evaluate our security posture with respect to the HITRUST
                                                                   framework.
CUSTOMER PRIVACY AND DATA
SECURITY                                                           CORPORATE PHILANTHROPY AND
                                                                   VOLUNTEERING
We are committed to maintaining the highest levels of
data security within our operational systems. To help              We focus our philanthropic and employee volunteer pro-
manage our risk profile, we have placed oversight of               gram primarily on partnerships with local stakeholders to
cybersecurity and data protection with the full Board of           promote disease awareness.
Directors.
                                                                   For several years we have collaborated with the Crohn’s
In our approach to IT risk management, we leverage a               & Colitis Foundation to host Crohn’s & Colitis Awareness
combination of leading industry frameworks such as the             Week and participate in the Take Steps campaign in
International Organization for Standardization (ISO), the          support of combating Crohn’s and ulcerative colitis. In
National Institute of Standards and Technology (NIST),             2020, Team Arena had more than 50 employee partici-
and Control Objectives for Information and Related                 pants across two virtual events and raised over $17,000 in
Technologies (COBIT). We have established policies and             donations. On the national level, we participate in Crohn’s
procedural approaches based on these frameworks to                 & Colitis Foundation meetings and discussions on how to
maintain the security, confidentiality, and integrity of our       improve the patient experience.
information assets. Specifically, we employ a combina-
tion of anti-malware threat prevention, device encryption,         In 2020, we announced the launch of the annual Arena of
multi-factor authentication, vulnerability scans, regular          CareTM Award in Inflammatory Bowel Disease (IBD) —a
penetration testing, annual reviews, and continuous pro-           global competitive grant opportunity offered to 501(c)
cess improvement to mitigate IT risk.                              (3) or similarly credentialed non-profit organizations to
                                                                   fund novel programs addressing unmet need in the IBD
We have in place a Global IT Security and Compliance               community.
Policy and have also adopted a European Data Protection
Policy that complies with the European Union’s General             We have a charitable matching program where, several
Data Protection Regulation (GDPR).                                 times each year, we highlight and endorse up to three
                                                                   charities nominated by our employees for special spon-
Our vice president of information technology updates               sorship and match employee donations of up to $150,
the Board and the Audit Committee on the organization’s            in addition to our regular employee-matching program.
cybersecurity risk profile on an annual basis. We con-             In 2020, we specifically supported organizations that
tinue to make improvements to our data security posture,           focused on COVID-19 relief efforts.
including optimizing security incident and event manage-
ment tools and overall detection processes. Our Incident
Response Policy includes an escalation process up to and
including the board.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                               16
E NVI RO N M E NTAL MANAG E M E NT

Our mindset is “think globally, act locally” when it comes to promoting environmental sus-
tainability within our own operations. We recognize the environmental risks associated with
our operations both locally and globally and are in the process of implementing environmen-
tal management programs to mitigate such risks in the key areas of energy, water, waste, and
pharmaceuticals in the environment.

Energy                                                             Facilities

Our main San Diego, California, building features a roof-          Arena performed major improvements to its facilities in
top solar array with expected monthly energy production            the last 18 months, including:
of 25,000 kWh. We utilize a building automation system
(BAS) to reduce cooling and heating, which decreases               • Efficient systems furniture, with more ergonomic task
energy usage by up to 30%. We have also implemented                  seating
LED lighting throughout the facility, reducing energy con-         • LowVOC paint and high-performance flooring (LVP, tile,
sumption by about 20%.                                               carpeting)
                                                                   • Motion-controlled lighting sensors and improved HVAC
Water                                                                controls
                                                                   • Better AV solutions (low energy-emitting LCD screens
In 2020, our total water consumption at the San Diego                versus plasma screens)
location was 97,240 gallons, representing a 95% decrease           • MERV 14 filters to help minimize airborne transmission
from 2019, primarily driven by the work-from-home pol-               of particulates in our air transmission systems
icy implemented in March at the start of the COVID-19                (recommended by the EPA and CDC)
pandemic.
                                                                   As our team and our offices expand, we will continue to
Waste                                                              incorporate environmental considerations within our site
                                                                   selection process. These include locations near ameni-
We do not generate or handle any biowaste, with the                ties, lower operating costs for better energy management,
exception of a small lab on our San Diego campus oper-             certified green or LEED buildings, access to open space,
ated by a tenant. For this facility, we carry and are in           and shorter commute times for staff.
compliance with the requisite California hazardous waste
permit.

 PERFORMANCE METRICS                                                             2018               2019               2020

 Natural Gas (Therms)                                                           16,462             21,155             13,800

 Electricity (MWh)                                                               1,144             1,328                726

 Scope 1 Emissions (MtCO2e)                                                        87                275                 53

 Scope 2 Emissions (MtCO2e)                                                       275                319                160

 Total Emissions (MtCO2e)                                                         362                594                213

Our 2021 goals include devising a comprehensive plan for our facilities organization, which will include decommission-
ing equipment and improving building performance, establishing a design standard for all our campuses incorporating
sustainable design and environmentally safe practices, and installing electric vehicle chargers at our San Diego
location.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                             17
FR AM E WO RK S AN D STAN DARDS

SUSTAINABILITY ACCOUNTING STANDARDS BOARD (SASB)

We leveraged the accounting standards for the biotechnology and pharmaceuticals industry
from the Sustainability Accounting Standards Board (SASB) to help develop and prioritize
areas for inclusion in our ESG report. The table of SASB accounting metrics below includes
references to sections within this report where specific topics are discussed.

 TOPIC                             ACCOUNTING METRIC                                              SASB CODE      SECTION

                                   Discussion, by world region, of management process for
                                                                                                  HC-BP-210a.1
                                   ensuring quality and patient safety during clinical trials

                                   Number of FDA sponsor inspections related to clinical
                                                                                                                 Safety of Clinical
                                   trial management and pharmacovigilance that resulted
 Safety of Clinical                                                                               HC-BP-210a.2   Trial Participants;
                                   in Voluntary Action Indicated (VAI) and  Official Action
 Trial Participants                                                                                              Business Ethics and
                                   Indicated (OAI)
                                                                                                                 Compliance
                                   Total amount of monetary losses as a result of legal
                                   proceedings associated with clinical trials in developing      HC-BP-210a.3
                                   countries

                                   Description of actions and initiatives to promote access
                                   to healthcare products for priority diseases and in priority   HC-BP-240a.1
                                   countries as defined by the Access to Medicine Index                          Patient Advocacy,
 Access to Medicines                                                                                             Access, and
                                   List of products on the WHO List of Prequalified Medicinal                    Affordability
                                   Products as part of its Prequalification of Medicines          HC-BP-240a.2
                                   Programme (PQP)

                                   Number of settlements of abbreviated new drug
                                   application (ANDA) litigation that involved payments and/
                                                                                                  HC-BP-240b.1
                                   or provisions to delay bringing an authorized generic
                                   product to market for a defined time period
                                                                                                                 Patient Advocacy,
 Affordability and
                                   Percentage change in average list price and average net                       Access, and
 Pricing
                                   price across US product portfolio compared to previous         HC-BP-240b.2   Affordability
                                   year

                                   Percentage change in list price and net price of product
                                                                                                  HC-BP-240b.3
                                   with largest increase compared to previous year

                                   List of products in the FDA’s MedWatch Safety Alerts for
                                                                                                  HC-BP-250a.1
                                   Human Medical Products database

                                   Number of fatalities associated with products as reported
                                                                                                  HC-BP-250a.2
                                   in the FDA Adverse Event Reporting System

                                   Number of recalls issued and total units recalled              HC-BP-250a.3
 Drug Safety                                                                                                     Drug Safety
                                   Total amount of product accepted for take-back, reuse, or
                                                                                                  HC-BP-250a.4
                                   disposal

                                   Number of FDA enforcement actions taken in response
                                   to violations of current good manufacturing practices          HC-BP-250a.5
                                   (cGMPs), by type

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                       18
TOPIC                             ACCOUNTING METRIC                                                 SASB CODE      SECTION

                                   Description of methods and technologies used to maintain
                                   traceability of products throughout the supply chain and          HC-BP-260a.1
                                   prevent counterfeiting

                                   Discussion of process for alerting customers and business
 Counterfeit Drugs                                                                                                  Counterfeit Drugs
                                   partners of potential or known risks associated with              HC-BP-260a.2
                                   counterfeit products

                                   Number of actions that led to raids, seizure, arrests, and/or
                                                                                                     HC-BP-260a.3
                                   filing of criminal charges related to counterfeit products

                                   Total amount of monetary losses as a result of legal
                                                                                                     HC-BP-270a.1
                                   proceedings associated with false marketing claims
 Ethical Marketing                                                                                                  Ethical Marketing
                                   Description of code of ethics governing promotion of off-
                                                                                                     HC-BP-270a.2
                                   label use of products

                                   Discussion of talent recruitment and retention efforts for
 Employee                                                                                            HC-BP-330a.1
                                   scientists and research and development personnel
 Recruitment,                                                                                                       Employee Training
 Development, and                  Voluntary and involuntary turnover rate for executives and                       and Development
 Retention                         senior managers, mid-level managers, professionals, and           HC-BP-330a.2
                                   all others

                                   Percentage of (1) entity's facilities and (2) Tier I suppliers'
                                   facilities participating in the Rx-360 International                             Supply Chain
 Supply Chain
                                   Pharmaceutical Supply Chain Consortium audit program              HC-BP-430a.1   Management and
 Management
                                   or equivalent third-party audit programs for integrity of                        Human Rights
                                   supply chain and ingredients

                                   Total amount of monetary losses as a result of legal
                                                                                                     HC-BP-510a.1
                                   proceedings associated with corruption and bribery                               Business Ethics and
 Business Ethics
                                   Description of code of ethics governing interactions with                        Compliance
                                                                                                     HC-BP-510a.2
                                   health care professionals

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                          19
UNITED NATIONS SUSTAINABLE DEVELOPMENT GOALS (SDGS)

We are aligning our activities with the United Nations Sustainable Development Goals (SDGs). The goals were estab-
lished in 2015 by world leaders to end poverty, protect the planet, and seek to ensure prosperity for all. As a result of
our review, we have determined that our current activities most closely align with the following SDGs:

 RELEVANT SDG                                                      ARENA RATIONALE/ALIGNMENT                          LOCATION IN ESG REPORT

                             Goal 3: Good Health and               Our purpose is simple — deliver important       Patient Advocacy, Access,
                             Well-Being                            medicines to patients who need them. We         and Affordability
                                                                   embody the essence of this SDG to ensure
                             Full Description:
                                                                   healthy lives through our patient advocacy
                             Ensure healthy lives and
                                                                   platform and partnerships that help us identify
                             promote well-being for all at
                                                                   high-risk or undertreated patient populations.
                             all ages

                             Goal 5: Gender Equality               At Arena, we value diverse perspectives at         Board Diversity and
                                                                   all levels of our organization and ensure that     Independence; Inclusion,
                             Full description:
                                                                   starts with our leadership. There are four         Diversity, and Equity at
                             Achieve gender equality and
                                                                   female members on our Board of Directors,          Arena
                             empower all women and girls
                                                                   and over 60% of our total workforce is
                                                                   female. We continue to take steps to advance
                                                                   equity and foster a culture of inclusion and
                                                                   belonging.

                             Goal 8: Decent Work and               We are committed to investing in the               Employee Training and
                             Economic Growth                       leadership and growth of all members of the        Development
                                                                   Arena family. Our talent development team
                             Full description:
                                                                   specifically focuses on delivering learning
                             Promote sustained, inclusive,
                                                                   and developmental opportunities such as an
                             and sustainable economic
                                                                   extensive online learning platform that helps
                             growth; full and productive
                                                                   employees feel engaged in their career at
                             employment; and decent work
                                                                   Arena.
                             for all

                             Goal 9: Industry, Innovation,         Enhancing scientific research and                  Patient Advocacy, Access,
                             and Infrastructure                    encouraging innovation is central to our           and Affordability; Safety of
                                                                   mission. Our innovative thinking is notably        Clinical Trial Participants
                             Full description:
                                                                   demonstrated in the execution of our
                             Build resilient infrastructure,
                                                                   clinical trials and in several key projects and
                             promote inclusive and
                                                                   partnerships that influence the quality of care
                             sustainable industrialization,
                                                                   patients receive. We also plan on utilizing
                             and foster innovation
                                                                   artificial intelligence (AI) in our ongoing work
                                                                   with ulcerative colitis.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                                                     20
M ETH O D O LOGY

In preparation of publishing this report, we engaged a third-party consultant to conduct a
thorough ESG disclosure audit and peer benchmarking assessment to expand disclosure
beyond our 2020 inaugural ESG report. We relied upon the SASB to help us understand
the areas that may be of most relevance to our US investors, and we also engaged with
shareholders to identify their key ESG priorities. We referred broadly to the Global Reporting
Initiative (GRI) and aligned our impact with the United Nations Sustainable Development
Goals (SDGs).

FORWARD-LOOKING STATEMENTS

This ESG report includes forward-looking statements that involve a number of risks and uncertainties — including
statements about our investigative-stage drug candidates, plans, focus, goals, strategy, timelines, suppliers, partners,
collaborators, and licensees and other statements that are not historical facts, which may include words such as “can,”
“may,” “will,” “intend,” “plan,” “expect,” “believe,” “potential,” “opportunity,” “strive to,” or other similar words. For such
statements, we claim the protection of the Private Securities Litigation Reform Act of 1995. Actual events or results
may differ materially from expectations, and you are cautioned not to place undue reliance on these forward-looking
statements, which speak only as of the time they were made. Factors that could cause actual results to differ materi-
ally from such statements are disclosed in our Securities and Exchange Commission (SEC) filings, including under the
heading “Risk Factors.” We disclaim any intent or obligation to update these forward-looking statements other than as
may be required under applicable law.

A R E N A P H A R M A C E U T I C A L S 2 0 21 E S G R E P O R T                                                             21
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