ICON Public Company Annual Report 2021

FY2021 Annual Report · ICON Public Company

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Form 20-F
United States Securities and Exchange Commission

Washington, D.C. 20549 for the
year ended December 31, 2021

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12966.001_ICON_2022_Covers_Form 20-F_US_NoCopy_AW.indd 1

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C.20549
______________________________________________________________________
FORM 20-F
(Mark One)
☐ Registration statement pursuant to Section 12(b) or (g) of the Securities Exchange Act of 1934
OR
☒ Annual report pursuant to Section 13 or 15 (d) of the Securities Exchange Act of 1934
For the fiscal year ended: December 31, 2021
OR
☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
OR
☐ Shell company report pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934.
_____________________________________
Commission File Number: 333-08704
ICON PUBLIC LIMITED COMPANY

(Exact name of Registrant as Specified in its Charter)

ICON PLC

(Translation of Registrant’s name into English)

Ireland

(Jurisdiction of Incorporation or Organization)

South County Business Park,

Leopardstown,

Dublin 18, D18 X5R3,

Ireland

(Address of principal executive offices)

Brendan Brennan, Chief Financial Officer
South County Business Park, Leopardstown, Dublin 18, D18 X5R3, Ireland.
Brendan.Brennan@iconplc.com
+353-1-291-2000
_____________________________________
(Name, telephone number, email and/or facsimile number and address of Company contact person)
Securities registered or to be registered pursuant to Section 12(b) of the Act:

Title of each class
ORDINARY SHARES, PAR VALUE €0.06 EACH

ICLR

Name of exchange on which registered
NASDAQ Global Select Market

Securities registered or to be registered pursuant to section 12(g) of the Act:

Title of each class
NONE

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act:

NONE

(Title of class)

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual
report: 81,554,683 Ordinary Shares.
Indicate by check mark if the registrant is a well-known seasoned issuer, as determined in Rule 405 of the Securities Act. Yes ☒ No ☐
If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to section 13 or 15(d) of the
Securities Exchange Act of 1934. Yes ☐ No ☒
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 1934
during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days: Yes ☒ No ☐
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File
required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months: Yes ☒ No ☐
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non- accelerated filer.
Large accelerated filer ☒ Accelerated filer ☐ Non-accelerated filer ☐
Emerging growth company ☐
If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has
elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section
13(a) of the Exchange Act.
Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal
control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that
prepared or issued its audit report. ☒
Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:
U.S. GAAP ☒ International Financial Reporting Standards as issued Other ☐

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to
follow. Item 17 ☐ Item 18 ☐
If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act) Yes ☐
No ☒

by the International Accounting Standards Board ☐

TABLE OF CONTENTS

General Information

Cautionary Statement

PART I

Item 1. Identity of Directors, Senior Management and Advisors Item
2. Offer Statistics and Expected Timetable

Item 3. Key Information

Item 4. Information on the Company

Item 4A. Unresolved Staff Comments

Item 5. Operating and Financial Review and Prospects

Item 6. Directors, Senior Management and Employees

Item 7. Major Shareholders and Related Party Transactions

Item 8. Financial Information

Item 9. The Offer and Listing

Item 10. Additional Information

Item 11. Quantitative and Qualitative Disclosures about Market Risk
Item 12. Description of Securities Other than Equity Securities

PART II

Item 13. Defaults, Dividend Arrearages and Delinquencies

Item 14. Material Modifications to the Rights of Security Holders and Use of Proceeds
Item 15. Controls and Procedures

Item 16. Reserved

Item 16A. Audit Committee Financial Expert

Item 16B. Code of Ethical Conduct

Item 16C. Principal Accountant Fees and Services

Item 16D. Exemptions from the Listing Standards for Audit Committees

Item 16E. Purchases of Equity Securities by the Issuer and Affiliated Purchasers Item
16F. Changes in Registrant’s Certifying Accountant

Item 16G. Corporate Governance

Item 16H. Mine Safety Disclosure

PART III

Item 17. Financial Statements
Item 18. Financial Statements
Item 19. Exhibits

Index to Exhibits

Signatures

Page

100

157

158

General Information

As used herein, “ICON plc”, “ICON”, "ICON Group" the “Company” and “we”, "our" or “us” refer to ICON public limited

company and its consolidated subsidiaries, unless the context requires otherwise.

Unless otherwise indicated, ICON plc’s financial statements and other financial data contained in this Form 20-F are
presented in United States dollars (“$”) and are prepared in accordance with generally accepted accounting principles in the
United States (“U.S. GAAP”).

In this Form 20-F, references to "U.S. dollars", "U.S.$" or "$" are to the lawful currency of the United States, references
to “euro” or “€” are to the European single currency adopted by nineteen members of the European Union, references to "pound
sterling", "sterling", "£", "pence" or "p" are to the lawful currency of the United Kingdom. ICON publishes its consolidated financial
statements in U.S. dollars.

On July 1, 2021, the Company completed the Acquisition of PRA Health Sciences, Inc. ("PRA") by means of a merger
whereby Indigo Merger Sub, Inc., a Delaware corporation and subsidiary of ICON, merged with and into PRA, the parent of the
PRA Health Sciences Group ("the Acquisition" and "the Merger"). Upon completion of the Acquisition, PRA and its subsidiaries
became wholly owned subsidiaries within the ICON Group. The financial statements presented in this Form 20-F reflect the
results of the combined Company for the six month period since the Merger completion on July 1, 2021. The results of PRA in
the period prior to July 1, 2021 are not reflected in this Form 20-F, other than where clearly stated and required by GAAP.

Cautionary Statement Regarding Forward-looking Statements

Statements included herein which are not historical facts are forward-looking statements. Such forward-looking
statements are made pursuant to the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995 (the
“PSLRA”). Forward-looking statements may be identified by the use of future tense or other forward looking words such as
“believe”, “expect”, “anticipate”, “should”, “may”, “strategy”, or other variations or comparable terminology. The forward looking
statements involve a number of risks and uncertainties and are subject to change at any time. In the event such risks or
uncertainties materialize, our results could be materially adversely affected. The risks and uncertainties include, but are not
limited to, dependence on the pharmaceutical industry and certain clients, the need to regularly win projects and then to execute
them efficiently and correctly, the challenges presented by rapid growth, our expectations concerning the ongoing impact of the
novel coronavirus identified as 'COVID-19' on our operational results, the challenges associated with the integration of the PRA,
competition and the continuing consolidation of the industry, the dependence on certain key executives, changes in the
regulatory environment and other factors identified in the Company’s United States Securities and Exchange Commission filings
and in the “Risk Factors” included on pages 5 through 23. The Company has no obligation under the PSLRA to update any
forward looking statements and does not intend to do so.

1Part I

Item 1. Identity of Directors, Senior Management and Advisors.

Not applicable.

Item 2. Offer Statistics and Expected Timetable.

Not applicable.

Item 3. Key Information.

A. Company updates

PRA Health Sciences, Inc. - Merger Completion

On July 1, 2021, ICON completed the Acquisition of PRA by means of a merger whereby Indigo Merger Sub, Inc., a
Delaware corporation and subsidiary of ICON, merged with and into PRA, the parent of the PRA Health Sciences Group ("the
Acquisition" and "the Merger"). The combined Group retained the name ICON and brought together approximately 38,000
employees (as at the Merger date) across the globe, creating one of the world’s most advanced healthcare intelligence and
clinical research organizations.

The combined Company leverages its enhanced operations to transform clinical trials and accelerate biopharma
customers’ commercial success through the development of much needed medicines and medical devices. The new ICON has a
renewed focus on leveraging data, applying technology and accessing diverse patient populations to speed up drug
development.

Upon completion of the Merger, pursuant to the terms of the Merger Agreement, PRA became a wholly owned
subsidiary of ICON. Under the terms of the Merger, PRA shareholders received per share $80 in cash and 0.4125 shares of
ICON stock. The trading of PRA common stock on NASDAQ was suspended prior to market open on July 1, 2021.

The total value of the Merger consideration is $12.0 billion and has resulted in the recognition of goodwill of $8.1 billion,
intangible assets of $4.9 billion and an associated deferred tax liability of $1.1 billion. The accounting for the Merger remains
provisional for the year ended December 31, 2021 and the Company expects to finalize the accounting by June 30, 2022.

Senior Secured Credit Facilities

In conjunction with the completion of the Merger Agreement, on July 1, 2021, ICON entered into a credit agreement
providing for a senior secured term loan facility of $5,515 million and a senior secured revolving loan facility in an initial
aggregate principal amount of $300 million (the "Senior Secured Credit Facilities"). The proceeds of the senior secured term loan
facility were used to repay the outstanding amount of (i) PRA’s existing credit facilities and (ii) the Company's private placement
notes outstanding and fund, in part, the Merger. The senior secured term loan facility will mature in July 2028 and the revolving
loan facility will mature in July 2026.

Borrowings under the senior secured term loan facility amortize in equal quarterly installments in an amount equal to
1.00% per annum of the principal amount, with the remaining balance due at final maturity. The interest rate margin applicable to
borrowings under the senior secured term loan facility is LIBOR plus an applicable margin of 2.50%, in each case, with a step
down of 0.25% if the first lien net leverage ratio is equal to or less than 4.00 to 1.00. The senior secured term loan facility is
subject to a LIBOR floor of 0.50%.

The Borrowers’ (as defined in the credit agreement) obligations under the Senior Secured Credit Facilities are
guaranteed by ICON and the subsidiary guarantors. The Senior Secured Credit Facilities are secured by a lien on substantially
all of ICON’s, the Borrowers’ and each of the subsidiary guarantor’s assets (subject to certain exceptions), and the Senior
Secured Credit Facilities will have a first-priority lien on such assets, which will rank pari passu with the lien securing the Senior
Secured Notes (see below), subject to other permitted liens.

On September 27, 2021, the Company repaid $13.8 million of the senior secured term loan facility and made a quarterly
interest payment of $40.4 million. On November 10, 2021, the Company achieved a net leverage ratio of less than 4 times and
the margin applicable to the senior secured term loan was reduced by 0.25% with the overall rate reducing from 3.0% to 2.75%.
On December 29, 2021, the Company repaid $500.0 million of the senior secured term loan facility and made a quarterly interest
payment of $40.8 million.

At December 31, 2021, no amounts have been drawn under the revolving loan facility with the exception of $4.1 million

letters of credit given to landlords to guarantee lease arrangements.

2Senior Secured Notes

In addition to the Senior Secured Credit Facilities, on July 1, 2021, a subsidiary of the Company issued $500.0 million in
aggregate principal amount of 2.875% senior secured notes due July 2026 (the “Senior Secured Notes”) in a private offering (the
“Offering”). The Senior Secured Notes will mature on July 15, 2026. The proceeds from the Offering and borrowings made under
the Senior Secured Credit Facilities, together with cash on hand, were used to (i) fund the cash consideration payable by ICON
for the Merger, (ii) repay existing indebtedness of ICON and PRA and (iii) pay fees and expenses related to the Merger. The
Senior Secured Notes are guaranteed on a senior secured basis by ICON and its direct and indirect subsidiaries that guarantee
the Senior Secured Credit Facilities.

Repayment of the 2020 Senior Notes

On December 8, 2020, the Company issued new senior notes, (the "2020 Senior Notes") for aggregate gross proceeds
of $350.0 million in the private placement market. The 2020 Senior Notes were issued in two tranches: Series A Notes of $275.0
million at a fixed interest rate of 2.32% and Series B Notes of $75.0 million at a fixed interest rate of 2.43%. The effective interest
rate was adjusted by the impact of an interest rate cash flow hedge which was entered into in advance of the rate fixing date.
This cash flow hedge was deemed to be fully effective in accordance with ASC 815 'Derivatives and Hedging'. The realized loss
related to this derivative was recorded within other comprehensive income and amortized over the life of the 2020 Senior Notes.
The effective rate on the 2020 Senior Notes was fixed at 2.41%.

In connection with the Merger with PRA, the Company was required to repay the 2020 Senior Notes prior to entering
into the Senior Secured Credit Facilities and the Senior Secured Notes. The 2020 Senior Notes were repaid on July 1, 2021
inclusive of early repayment charges. The total repayment on July 1, 2021 was $364.0 million.

Board Appointments

As a result of the Merger, Mr. Colin Shannon and Dr. Linda Grais, who both served on the PRA Board, joined ICON’s

Board of Directors with effect from July 1, 2021. Their biographies are set out on page 72.

Assessment of COVID-19 impact on the business

In the period since December 31, 2020, the Company has continued to experience a return to positive growth in
revenue and net income as a result of the ongoing recovery from the global COVID-19 pandemic. At this point in time, there still
remains some degree of uncertainty relating to the long-term effect of COVID-19 on the Company and when it will be possible for
business activity to return to normal operating levels. Although the impact of the global COVID-19 pandemic on the business is
reducing, the emergence of COVID-19 variants of concern continue to create restrictions on the ability to ensure laboratory
samples are collected and analyzed on time, the ability to monitor clinical trials, the ability of patients or service providers to
travel, and our ability to travel, as a result of the outbreak.

ICON has continued to successfully mobilize its vaccine resources to address the COVID-19 global threat, including its
ability to conduct home-based trials to minimize infection. In addition, the Company is currently providing clinical monitoring and
safety oversight on numerous COVID-19 trials for both the private and government sectors.

Share repurchase program

During the year ended December 31, 2020, 1,235,218 ordinary shares were redeemed by the Company for a total
consideration of $175.0 million. During the year ended December 31, 2021, no ordinary shares were redeemed by the Company
under this buyback program.

All ordinary shares that were redeemed under the buyback program were canceled in accordance with the Constitution
of the Company and the nominal value of these shares transferred to other undenominated capital as required by Irish Company
law.

3
B. Capitalization and indebtedness

The following table presents our capitalization as at December 31, 2021 and December 31, 2020:

Total debt

Less debt issuance costs and debt discount

Total debt, net

Share Capital

Additional paid-in capital

Other undenominated capital

Accumulated other comprehensive income

Retained earnings

Total Shareholders’ Equity

December 31, December 31,

2021

2020

5,501,213

350,000

(64,901)

(1,523)

5,436,312 $

348,477

6,640

4,580

6,733,910

617,104

1,134

(90,937)

(35,477)

1,416,080

1,262,895

8,066,827 $

1,850,236

Total Capitalization

$ 13,503,139 $

2,198,713

On July 1, 2021, the Company completed the Acquisition of PRA. In accordance with the terms of the Merger
Agreement, the Company issued 27,372,427 shares of the Company’s ordinary share capital at par value in exchange for all
outstanding PRA shares of common stock. The Company also drew down debt of $6,015 million in order to finance the cash
portion of the Merger consideration, of which, $514 million has been repaid by December 31, 2021 from cash generated by the
Company in the period since the completion of the Merger.

C. Reasons for the offer and use of proceeds

Not applicable

D. Risk Factors

Various risk factors that are relevant to our business and the services we provide are outlined below. The occurrence of
any of these events may materially and adversely affect our business operations, financial condition and results of operations
and future prospects.

Summary of Risk Factors

Below is a summary of some of the principal risks that could adversely affect our business, operations and financial results:

Risk Related to Our Business and Operations

• We depend on a limited number of customers and a loss of, or significant decrease in, business from one or more of

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•

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them could affect our business.
Our financial results may be adversely impacted if we under price our contracts, overrun our cost estimates or fail to
receive approval for, or experience delays in, documenting change orders.
The potential loss or delay of our large contracts, or of multiple contracts, could adversely affect our results.
If we do not generate new business awards, or if new business awards are delayed, terminated, reduced in scope or fail
to go to contract, our business, financial conditions, results of operations or cash flows may be materially adversely
affected.
If we are unable to successfully develop and market new services or enter new markets, our growth, results of
operations or financial condition could be adversely affected.
If we fail to attract or retain key personnel, our performance may suffer.
Our ability to perform clinical trials is dependent upon the ability to recruit suitable willing patients.
Our ability to perform clinical trials is dependent upon our ability to recruit suitable willing investigators.
The combined Company may be unable to retain employees through the integration period which could disrupt the
integration plan, cause disruption to day-to-day activities and result in additional costs to the business.
Climate change, extreme weather events, earthquakes and other natural disasters could adversely affect our business.
A disease outbreak, epidemic or pandemic such as COVID-19, could adversely affect our business performance.
Our business depends on the continued effectiveness and availability of our information systems, including the
information systems we use to provide our services to our clients, and any system failures of, security breaches of or
cyber-attacks to these systems may materially limit our operations or have a material adverse effect on our results of
operations.
Upgrading the information systems that support our operating processes and evolving the technology platform for our
services pose risks to our business.
Failure to meet productivity objectives under our business improvement objectives could adversely impact our
competitiveness and therefore our operating results.

• We rely on our interactive response technologies to provide accurate information regarding the randomization of

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•

patients and the dosage required for patients enrolled in the trials.
A failure to identify and successfully close and integrate strategic acquisition targets could adversely impact our ongoing
business and financial results.
ICON may be unable to realize anticipated cost and tax synergies and expects to incur substantial expenses related to
the Merger.
Improper performance of our services could adversely impact our reputation and our financial results.
Our relationships with existing or potential customers who are in competition with each other may adversely impact the
degree to which other customers or potential customers use our services, which may adversely affect our results of
operations.

• We have only a limited ability to protect our intellectual property rights and these rights are important to our success.
•

The biopharmaceutical industry has a history of patent and other intellectual property litigation and we might be involved
in costly intellectual property lawsuits.

• We act as authorized representative or legal representative for some clients pursuant to certain EU legislation.
• We rely on third parties to provide certain data and other information to us. Our suppliers or providers might increase
our cost to obtain, restrict our use of or refuse to license data, which could lead to our inability to access certain data or
provide certain services and, as a result, materially and adversely affect our operating results and financial condition.
• We rely on third parties for important products, services and licenses to certain technology and intellectual property
rights, if there was failure in delivery by these parties, we might not be able to continue to obtain such products, services
and licenses.

Risk Related to Our Industry

•

Outsourcing trends in the pharmaceutical, biotechnology and medical device industries and changes in spending on
research and development could adversely affect our operating results and growth rates.
Large pharmaceutical companies are increasingly consolidating their vendor base and entering strategic partnership
arrangements with a limited number of outsource providers.
Increased collaboration amongst pharmaceutical companies in research and development activities may lead to fewer
research opportunities.

• We operate in a highly competitive and dynamic market.
• We may be adversely affected by industry, customer or therapeutic concentration.

5Risk Related to Our Financial Results and Financial Position

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Our quarterly results are dependent upon a number of factors and can fluctuate from quarter to quarter. They may fall
short of prior periods, our projections or the expectations of securities analysts or investors, which may adversely affect
the market price of our stock.
Our exposure to exchange rate fluctuations could adversely affect our results of operations.
Our effective tax rate may fluctuate from quarter-to-quarter, which may adversely affect our results of operations.
Our unsatisfied performance obligation may not convert to revenue and the rate of conversion may slow.
The Company is exposed to various risks in relation to our cash and cash equivalents and short term investments.
Changes in accounting standards may adversely affect our financial statements.

Risk Related to Political, Legal or Regulatory Environment

• We may lose business opportunities as a result of health care reform and the expansion of managed care

•

organizations.
Healthcare reform legislation, other changes in the healthcare industry and in healthcare spending could adversely
affect our business model, financial condition or results of operations.
The unrest in Eastern Europe could adversely affect our results of operations.

•
• We may lose business as a result of changes in the regulatory environment.
•

Failure to comply with the regulations and requirements of the U.S. Food and Drug Administration and other regulatory
authorities could result in substantial penalties and/or loss of business.

•

• We are subject to political, regulatory, operational and legal risks associated with our international operations.
• We operate in many different jurisdictions and we could be adversely affected by violations of anti-corruption laws,
including the United States Foreign Corrupt Practices Act of 1977 ("FCPA"), UK Bribery Act of 2010 ("Bribery Act") and
similar anti-corruption laws in other jurisdictions as well as laws and regulations relating to trade compliance and
economic sanctions.
Current and proposed laws and regulations regarding the protection of personal data could result in increased risks of
liability or increased costs to us or could limit our service offerings.
Our employees may engage in misconduct or other improper activities, including noncompliance with regulatory
standards and requirements, which could have a material adverse effect on our business.
The failure to comply with our government contracts or applicable laws and regulations could result in, among other
things, fines or other liabilities, and changes in procurement regulations could adversely impact our business, results of
operations or cash flows.
Liability claims brought against us could result in payment of substantial damages, costs and liabilities and decrease our
profitability.
Environmental, social and governance matters may impact our business and reputation.

•

Risk Related to Our Indebtedness

•

• We have incurred substantial additional indebtedness in connection with the Merger , which could impair our flexibility
and access to capital and could adversely affect the combined Company’s business, financial condition or results of
operations.
Covenants in our credit agreement and the indenture governing the Senior Secured Notes may restrict our business
and operations. Our financial condition and results of operations could be adversely affected if we do not comply with
those covenants.
Interest rate fluctuations may materially adversely affect our results of operations and financial conditions due to the
variable interest rate on our senior secured term loan facility, in the event that the Company draws down on the
revolving credit facility or in respect of any future issuances of debt.
The phasing out of LIBOR may affect our interest expense with respect to borrowings under the Senior Secured
Facilities.

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Risk Related to Our Common Stock

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Volatility in the market price of our common stock could lead to losses by investors.
If securities analysts or industry analysts do not publish reports about our business or if they downgrade our stock or
our sector, our stock price and trading volumes could decline.
An investor's return may be reduced if we lose our foreign private issuer status.

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• We do not expect to pay any cash dividends for the foreseeable future.
•

A future transfer of ICON ordinary shares, other than one effected by means of the transfer of book entry interests in the
Depositary Trust Company ("DTC"), may be subject to Irish stamp duty.

6Risk Related to Our Business and Operations

We depend on a limited number of customers and a loss of, or significant decrease in, business from one or more of
them could affect our business.

During the year ended December 31, 2021, 31.6% of our revenues were derived from our top five customers, with no
one customer individually contributing more than 10% of our revenues during the period. Our largest customer represented a
strategic partnership with a large global pharmaceutical company and contributed 8.0% of revenue for the year. During the year
ended December 31, 2020, 39.1% of our revenues were derived from our top five customers, with one customer contributing
more than 10% of our revenues during the period (12.1%). No other customer contributed more than 10% of our revenues during
this period. During the year ended December 31, 2019, 37.6% of our revenues were derived from our top five customers, with
two customer contributing more than 10% of our revenues during the period (the largest contributing 12.5% and the second
largest contributing 10.2%). No other customer contributed more than 10% of our revenues during this period (see note 17 -
Disaggregation of revenue in the consolidated financial statements). If we lose clients, we may not be able to attract new ones
and if we lose individual projects, we may not be able to replace them. The loss of, or a significant decrease in, business from
one or more of these key customers could have a material adverse impact on our results of operations and financial results.

Our financial results may be adversely impacted if we underprice our contracts, overrun our cost estimates or fail to
receive approval for, or experience delays in, documenting change orders.

Many of our contracts are long-term fixed price or fixed unit price contracts for services. As a result, variations in the
timing and progress of large contracts may materially adversely affect our results of operations. Revenue recognized on these
service contracts are based on an assessment of progress towards completion being the cost of time and other third party costs
as a percentage of total estimated time and other third party costs to deliver our services. As a result, variations in the timing and
progress of large contracts may materially adversely affect our results of operations. Estimating time and costs to complete
requires judgment and includes consideration of the complexity of the study, the number of geographical sites where trials are to
be conducted and the number of patients to be recruited at each site. We regularly review the estimated hours on each contract
to determine if the budget accurately reflects the agreed tasks to be performed, taking into account the state of progress at the
time of review.

We bear the risk of cost overruns unless the scope of activity is revised from the contract specifications and we are able
to negotiate a contract modification. We endeavor to ensure that any changes in scope are appropriately monitored and change
orders or contract modifications are promptly negotiated and documented for changes in scope. If we fail to successfully
negotiate change orders for changes in the resources required or the scope of the work to be performed, and the costs of
performance of these contracts exceeded their fixed fees, it could materially adversely affect our operations and financial results.

The potential loss or delay of our large contracts, or of multiple contracts, could adversely affect our results.

Our clients may discontinue using our services completely or cancel some projects either without notice or upon short
notice. The termination or delay of a large contract, or of multiple contracts, could have a material adverse effect on our revenue
and profitability. Historically, clients have canceled or discontinued projects and may in the future cancel their contracts with us
for reasons including, amongst others:

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the failure of products being tested to satisfy safety or efficacy requirements;
unexpected or undesired clinical results of the product;
a decision that a particular study is no longer necessary or viable;
poor project performance, quality concerns, insufficient patient enrollment or investigator recruitment; and
production problems resulting in shortages of the drug.

As a result, contract terminations, delays or other changes are part of our clinical services business. In the event of
termination, our contracts often provide for fees for winding down the trial but these fees may not be sufficient for us to maintain
our margins, and termination may result in lower resource utilization rates. In addition, we may not realize the full benefits of our
unsatisfied performance obligation of contractually committed services if our clients cancel, delay or reduce their commitments
under our contracts with them. Therefore, the loss, early termination or delay of a large contract or contracts could adversely
affect our revenues and profitability.

If we do not generate new business awards, or if new business awards are delayed, terminated, reduced in scope or fail
to go to contract, our business, financial conditions, results of operations or cash flows may be materially adversely
affected.

Our business is dependent on our ability to generate new business awards from new and existing customers and
maintain existing customer contracts. If we were unable to generate new business awards on a timely basis and contract for
those awards, that could have a material impact on our business, financial condition, results of operations or cash flows.

If we are unable to successfully develop and market new services or enter new markets, our growth, results of
operations or financial condition could be adversely affected.

A key element of our growth strategy is the successful development and marketing of new services or entering new
markets that complement or expand our existing business. As we develop new services or enter new markets, we may not have
or be able to adequately build the competencies necessary to perform such services satisfactorily, may not receive market
acceptance for such services or may face increased competition. If we are unable to succeed in developing new services,
entering new markets or attracting a client base for our new services or in new markets, we will be unable to implement this
element of our growth strategy, and our future business, reputation, results of operations could be adversely impacted.

If we fail to attract or retain key personnel, our performance may suffer.

Our business, future success and ability to continue to expand operations depends upon our ability to attract, hire, train
and retain qualified professional, scientific and technical operating people. We compete for qualified professionals with other
Clinical Research Organizations (“CROs”), temporary staffing agencies and the in-house departments of pharmaceutical,
biotechnology and medical device companies. An inability to attract and retain a sufficient number of high caliber clinical research
professionals (in particular, key personnel and executives) at an acceptable cost would impact our ability to provide our services,
our future performance and results of operations.

Our ability to perform clinical trials is dependent upon the ability to recruit suitable willing patients.

The successful completion of clinical trials is dependent upon the ability to recruit suitable and willing patients on which
to test the drug under study. The availability of suitable patients for enrollment on studies is dependent upon many factors
including, amongst others, the size of the patient population, the design of the study protocol, eligibility criteria, the referral
practices of physicians, the perceived risks and benefits of the drug under study and the availability of alternative medication,
including medication undergoing separate clinical trials. Insufficient or inappropriate patient enrollment may result in the
termination or delay of a study which could have a material adverse impact on our results of operations.

The Company is focused on continuing to develop its expertise in patient recruitment with the establishment in 2020 of
Accellacare, a global clinical research network, offering patients easier and faster access to innovative treatments and offering
customers the option to deploy decentralized trails. The focus is on making it easier for the site and the patient to actively
participate in a trial to ensure increased predictability, enrollment and retention. Our site and patient solutions group includes
upfront planning of site and patient management including identification, enrollment and engagement.

Improved site selection is achieved through:

•
•
•

leading technology to identify where the patients are that match the protocol;
assessment of the qualification of sites based on real data;
partnerships with leading technology vendors and developing the capability to enable EMR interrogation into clinical insights
such as sub-populations and larger pre-screened pool where the technology and regulations are enabled.

The burden on the site, in ensuring patient enrollment and engagement, is achieved through integrated site networks.
ICON has a number of site alliance partners. During 2018, we enhanced our site and patient recruitment capabilities with an
expansion of the PMG Research network through a partnership with the DuPage Medical Group. During 2019, we further
enhanced our site and patient recruitment abilities through the strategic acquisitions of MeDiNova and CRN. In 2020, we entered
into an agreement to jointly establish a new company, Oncacare Limited ("Oncacare"), with a third party. Oncacare operates as a
specialized oncology site network in the US and EMEA regions. The new site network is focused on implementing a range of
commercial models with specialist oncology healthcare providers in the US and EMEA, to accelerate the recruitment and
retention of patients into oncology trials. The oncology site network operates as a joint venture between the Company and a third
party company which has extensive experience in developing and running a site network. We also use digital solutions to drive
site performance, including pre-screening, eConsent, learning management, document tracking and management with key
applications.

Our ability to perform clinical trials is dependent upon our ability to recruit suitable willing investigators.

We contract with physicians located in hospitals, clinics or other similar sites, who serve as investigators in conducting
clinical trials to test new drugs on their patients. Investigators supervise administration of the study drug to patients during the
course of the clinical trial. The successful conduct of a clinical trial is dependent upon the integrity, experience and capabilities of
the investigators conducting the trial. Insufficient investigator recruitment, which in turn may lead to insufficient or inappropriate
patient enrollment, may result in the termination or delay of a study which could have a material adverse impact on our results of
operations.

8
The combined Company may face challenges retaining employees through the integration period which could delay the
integration plan, cause disruption to day-to-day activities and result in additional costs to the business.

The attraction, development and retention of our talent is critical to the success of the combined Company, and we are
working to strengthen processes around these areas to minimize retention risk and support a successful integration. The
Company, led by the Chief Human Resource Officer, is taking meaningful action to retain employees. Through our annual Talent
Review process we have identified opportunities for improvement as it relates to employee retention. Our 2022 People Plans
have set specific goals for each functional area in terms of three critical areas: talent attraction, development and retention.
However, we can provide no assurances that our efforts in this respect will be successful.

Our leadership and talent programs contribute to the enhanced retention of our employees, better project deliverables
for our customers and the enhanced financial performance of the business. We aim to be an industry leader: a company where
talented people come to do important work, a place where our employees can shape the future of healthcare, grow their careers,
and reach their full potential. We have long held a deep commitment to cultivating strong people practices. This includes
competitive total rewards packages along with a focus on continuous learning. Our success depends on the knowledge,
capabilities, and quality of our people.

Climate change, extreme weather events, earthquakes and other natural disasters could adversely affect our business.

In recent years, extreme weather events and changing weather patterns such as storms, flooding, droughts and
temperature changes have become more common. As a result, we are potentially exposed to varying natural disaster or extreme
weather risks such as hurricanes, tornadoes, droughts or floods, or other events that may result from the impact of climate
change on the environment, such as sea level rise. As a result, we could experience increased costs, business interruptions,
destruction of facilities, and loss of life, all of which could have a material adverse effect on our business, financial condition, or
results of operations. The potential impacts of climate change may also include increased operating costs associated with
additional regulatory requirements and investments in reducing energy, water use and greenhouse gas emissions.

A disease outbreak, epidemic or pandemic such as COVID-19, could adversely affect our business performance.

A disease outbreak, such as influenza, coronavirus, or other biological attack could negatively impact our operations.
We could experience restrictions on our ability to travel, or the ability of patients or other service providers to travel, to monitor
our clinical trials and to ensure laboratory samples are collected and analyzed on time as a result of an outbreak. The potential
impact of an epidemic or pandemic may also result in increased operating costs and result in a requirement to increase
investment in impact prevention.

COVID-19 has, and may continue to, affect our business performance, and could adversely affect the economies and
financial markets worldwide, resulting in an economic downturn that could impact our business, financial condition and results of
operations. The Company has experienced volatility on our operations as a result of the global spread of COVID-19, including
restrictions on our ability to ensure laboratory samples are collected and analyzed on time, our ability to monitor our clinical trials,
the ability of patients or other service providers to travel, and our ability to travel. We have also experienced costs associated
with impact prevention.

The COVID-19 outbreak continues to evolve. While our site network and office facilities have predominantly re-opened,
the extent to which the outbreak and emergence of new variants of concern may continue to impact our business will depend on
future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic
spread of COVID-19, additional phases of the outbreak, travel restrictions and actions to contain the outbreak or treat its impact,
such as social distancing and quarantines or lock-downs, business closures or business disruptions and the effectiveness of
actions taken throughout the world to contain and treat the disease. We may also be required or choose to take temporary
measures intended to help minimize the risk of infection from the virus for our employees, including temporarily requiring all
employees to work remotely, suspending all non-essential travel worldwide and discouraging attendance at industry events,
industry and other conferences, and in-person work-related meetings, which could negatively affect our business and cannot
presently be predicted with confidence.

9Our business depends on the continued effectiveness and availability of our information systems, including the
information systems we use to provide our services to our clients, and any system failures of, security breaches of or
cyber-attacks to these systems may materially limit our operations or have a material adverse effect on our results of
operations.

Due to the global nature of our business and our reliance on information systems to provide our services, we use web-
enabled and other integrated information systems in delivering our services. We will continue to increase the use of these
systems and such systems will either be developed internally or provided in conjunction with third parties. We also provide
access to similar information systems to certain clients in connection with the services we provide them. As the use, scope and
complexity of our information systems continue to grow, we are exposed to, and will increasingly be exposed to, the risks
inherent in the development, integration and ongoing operation of evolving information systems, including:

•
•

•

disruption or failure of data centers, telecommunications facilities or other key infrastructure platforms;
security breaches, cyber-attacks or other failures or malfunctions in our application or information systems or their
associated hardware or other systems that we have access to, or that we rely upon, or that have access to our
systems;
security breaches, cyber-attacks or malfunctions with key suppliers or partners who we rely on to provide services
to customers; and
excessive costs, excessive delays or other deficiencies in, or problems with, systems development and
deployment.

The materialization of any of these risks may impede our ability to provide services, the processing of data, the delivery
of databases and services and the day-to-day management of our business and could result in the corruption, loss or
unauthorized disclosure of proprietary, confidential or other data, as well as reputational harm.

While we have cybersecurity controls and disaster recovery plans in place, they might not adequately protect us in the
event of a system failure, security breach or cyber-attack. Despite any precautions we take, damage from fire, floods, hurricanes,
power loss, telecommunications failures, computer viruses, information system security breaches, cyber-attacks and similar
events that impact on our various computer facilities could result in interruptions in the flow of data to our servers and from our
servers to our clients. Corruption or loss of data may result in the need to repeat a trial at no cost to the client, but at significant
cost to us, or result in the termination of one or more contracts, legal proceedings or claims against us or damage to our
reputation. Additionally, significant delays in system enhancements or inadequate performance of new or upgraded systems
once completed could damage our reputation and harm our business. Long-term disruptions in the infrastructure caused by
events such as security breaches, cyber-attacks, natural disasters, the outbreak of war, the escalation of hostilities and acts of
terrorism, particularly involving cities in which we have offices, could adversely affect our business.

Unauthorized disclosure of sensitive or confidential data, whether through system failure or employee negligence, fraud
or misappropriation, could damage our reputation and cause us to lose clients. Similarly, despite investing in information and
cyber-security controls there is a risk that unauthorized access to our information systems or those we develop for our clients,
whether by our employees or third parties, including a cyber-attack by computer programmers and hackers who may attack
ICON systems, develop and deploy viruses, worms, ransomware or other malicious software programs could result in negative
publicity, significant remediation costs, legal liability, loss of customers and damage to our reputation and could have a material
adverse effect on our results of operations and financial results. In addition, our liability insurance might not be sufficient in type,
the cover provided or amount to adequately cover us against claims related to security breaches, cyber-attacks and other related
breaches.

Our information systems and those of third parties which we utilize may face increased cybersecurity risks due to the
COVID-19 pandemic, including from the significant number of employees that are working remotely or otherwise impacted by
stay-at-home orders. Additional remote access points provide new potential vulnerabilities to cybercriminals. Employees of ICON
and third parties may be more susceptible to social engineering efforts, and to phishing attempts which can disguise malware as
a legitimate effort to circulate important information relating to COVID-19.

Additionally, ICON completed the Merger with PRA on July 1, 2021 and, as a result, the IT landscape and physical
footprint of the Company has increased significantly. As the organization invests in the consolidation of offices, data centers, IT
systems and business services a significant amount of due diligence has been completed to understand the IT landscape and
increased attack surface. While the organization continues with substantial integration efforts a failure to effectively manage
these activities in a timely and cost-effective manner may result in disruption to our business and negatively affect our
operations.

10
Upgrading the information systems that support our operating processes and evolving the technology platform for our
services pose risks to our business.

Continued efficient operation of our business requires that we implement standardized global business processes and
evolve our information systems to enable this implementation. We have continued to undertake significant programs to optimize
business processes with respect to our services. A failure to effectively manage the implementation and adapt to new processes
designed into these new or upgraded systems in a timely and cost-effective manner may result in disruption to our business and
negatively affect our operations.

We have entered into agreements with certain vendors to provide systems development and integration services that
develop or license to us the IT platform for programs to optimize our business processes. If such vendors fail to perform as
required or if there are substantial delays in developing, implementing and updating the IT platform, our customer delivery may
be impaired and we may have to make substantial further investments, internally or with third parties, to achieve our objectives.
Additionally, our progress may be limited by parties with existing or claimed patents who seek to prevent us from using preferred
technology or seek license payments from us.

Meeting our objectives is dependent on a number of factors which may not take place as we anticipate, including
obtaining adequate technology-enabled services, creating IT-enabled services that our customers will find desirable and
implementing our business model with respect to these services. We are continuing to develop opportunities for automation
across ICON using state of the art automation tools including Robotic Process Automation (RPA), the development of new
applications and capabilities, and enabling deeper integration across our digital ecosystem. If we do not keep pace with rapid
technological changes in the CRO industry, our products and services may become less competitive or even obsolete. This
applies in particular to our ICONIK, Firecrest, ADDPLAN, Integrated Dataverse (IDV®) and One Search services. Also, increased
requirements for investment in information technology may negatively impact our financial condition, including profitability.

Failure to meet productivity objectives under our business improvement objectives could adversely impact our
competitiveness and therefore our operating results.

We continue to pursue business transformation initiatives to embed technology and innovation and deliver operational
efficiencies. As part of these initiatives, we seek to improve our productivity, flexibility, quality, functionality and cost savings by
our on-going investment in global technologies, continuous improvement of our business processes and functions to deliver
economies of scale. These initiatives may not deliver their intended gains or be completed in a timely manner which may
adversely impact our competitiveness and our ability to meet our growth objectives and therefore, could adversely affect our
business and operating results, including profitability.

We rely on our interactive response technologies to provide accurate information regarding the randomization of
patients and the dosage required for patients enrolled in the trials.

We develop and maintain computer run and web based interactive response technologies to automatically manage the
randomization of patients in trials, assign the study drug and adjust the dosage when required for patients enrolled in trials we
support. An error in the design, programming or validation of these systems could lead to inappropriate assignment or dosing of
patients, which could give rise to patient safety issues and invalidation of the trial and/or liability claims against the Company,
amongst other things, any of which could have a material effect on our financial condition and operations.

A failure to identify and successfully close and integrate strategic acquisition targets could adversely impact our
ongoing business and financial results.

We have made a number of acquisitions, including the Merger, and continue to review new acquisition opportunities. If
we are unable to identify suitable acquisition targets, complete an acquisition or successfully integrate an acquired company or
business, our business may be disrupted. The success of an acquisition will depend upon, among other things, our ability to:

•

•
•
•
•

effectively and quickly assimilate the operations and services or products of the acquired company or
business;
integrate acquired personnel;
retain and motivate key employees;
retain customers; and
minimize the diversion of management's attention from other business concerns.

In the event that the operations of an acquired company or business do not meet our performance expectations, we
may have to restructure the acquired company or business or write-off the value of some, or all, of the assets of the acquired
company or business.

ICON may be unable to realize anticipated cost and tax synergies and expects to incur substantial expenses related to
the Merger.

ICON expects to generate run rate cost synergies of approximately $150 million and tax savings from the combined
target effective tax rate; both to be realized within approximately four years after completion of the Merger. ICON’s ability to
achieve such estimated cost and tax synergies in the timeframe described, or at all, is subject to various assumptions by ICON’s
management, which may or may not prove to be accurate, as well as the incurrence of costs in ICON’s operations that offset all
or a portion of such cost synergies. As a consequence, ICON may not be able to realize all of these cost and tax synergies within
the timeframe expected or at all. In addition, ICON may incur additional or unexpected costs in order to realize these cost and tax
synergies. ICON’s ability to realize tax synergies is subject to uncertainties. Failure to achieve the expected cost and tax
synergies could significantly reduce the expected benefits associated with the Merger. In addition, ICON has incurred and will
incur substantial expenses in connection with completion of the Merger. ICON expects to continue to incur non-recurring costs
associated with consummating the Merger, combining the operations of the two companies and achieving the desired cost
synergies. These fees and costs have been, and will continue to be, substantial. The substantial majority of nonrecurring
expenses will consist of transaction costs related to the Merger and include, among others, fees paid to financial, legal and
accounting advisors, employee benefit costs and filing fees. Such costs, as well as other unanticipated costs and expenses,
could have a material adverse effect on the financial condition and operating results of ICON following the completion of the
Merger.

Improper performance of our services could adversely impact our reputation and our financial results.

The performance of clinical development services is complex and time-consuming. We may make mistakes in
conducting a clinical trial that could negatively impact or damage the usefulness of the clinical trial or cause the results to be
reported improperly. If the clinical trial results are compromised, we could be subject to significant costs or liability, which could
have an adverse impact on our ability to perform our services. Large clinical trials are costly, and while we endeavor to
contractually limit our exposure to such risks, improper performance of our services could have an adverse effect on our financial
condition, damage our reputation and result in the cancellation of current contracts or failure to obtain new contracts from
affected or other clients.

Our relationships with existing or potential customers who are in competition with each other may adversely impact the
degree to which other customers or potential customers use our services, which may adversely affect our results of
operations.

The biopharmaceutical industry is highly competitive, with biopharmaceutical companies each seeking to persuade
payers, providers and patients that their drug therapies are better and more cost-effective than competing therapies marketed or
being developed by competing companies. In addition to the adverse competitive interests that biopharmaceutical companies
have with each other, biopharmaceutical companies also have adverse interests with respect to drug selection and
reimbursement with other participants in the healthcare industry, including payers and providers. Biopharmaceutical companies
also compete to be first to market with new drug therapies. We regularly provide services to biopharmaceutical companies who
compete with each other and we sometimes provide services to such customers regarding competing drugs in development. Our
existing or future relationships with our biopharmaceutical customers may therefore deter other biopharmaceutical customers
from using our services or may result in our customers seeking to place limits on our ability to serve other biopharmaceutical
industry participants. In addition, our further expansion into the broader healthcare market may adversely impact our
relationships with biopharmaceutical customers and such customers may elect not to use our services, reduce the scope of
services that we provide to them or seek to place restrictions on our ability to serve customers in the broader healthcare market
with interests that are adverse to theirs. Any loss of customers or reductions in the level of revenues from a customer could have
a material adverse effect on our results of operations, business and prospects.

We have only a limited ability to protect our intellectual property rights and these rights are important to our success.

Our success depends, in part, upon our ability to develop, use and protect our proprietary methodologies, analytics,
systems, technologies and other intellectual property. Existing laws of the various countries in which we provide services or
solutions offer only limited protection of our intellectual property rights, and the protection in some countries may be very limited.
We rely upon a combination of trade secrets, confidentiality policies, non-disclosure, invention assignment and other contractual
arrangements and patent, copyright and trademark laws, to protect our intellectual property rights. These laws are subject to
change at any time and certain agreements may not be fully enforceable, which could further restrict our ability to protect our
innovations. Intellectual property rights may not prevent competitors from independently developing services similar to, or
duplicative, of ours. Further, the steps we take in this regard might not be adequate to prevent or deter infringement or other
misappropriation of our intellectual property by competitors, former employees or other third parties and we might not be able to
detect unauthorized use of, or take appropriate and timely steps to enforce our intellectual property rights. Enforcing our rights
might also require considerable time, money and oversight and we may not be successful in enforcing our rights.

12The biopharmaceutical industry has a history of patent and other intellectual property litigation and we might be
involved in costly intellectual property lawsuits.

The biopharmaceutical industry has a history of intellectual property litigation, and these lawsuits will likely continue in
the future. Accordingly, we may face patent infringement legal proceedings by companies that have patents for similar business
processes or other legal proceedings alleging infringement of their intellectual property rights. Legal proceedings relating to
intellectual property could be expensive, take significant time and divert management’s attention from other business concerns,
regardless of the outcome of the litigation. If we do not prevail in an infringement lawsuit brought against us, we might have to
pay substantial damages and we could be required to stop the infringing activity or obtain a license to use technology on
unfavorable terms. Any infringement or other legal processing related to intellectual property could have a material adverse effect
on our operations and financial condition.

We act as authorized representative or legal representative for some clients pursuant to certain EU legislation.

We act as authorized representative pursuant to Medical Devices Directive 93/42/EEC (“MDD”) and Active Implantable
Medical Devices Directive 90/385/EEC (“AIMD”) for certain clients who are located outside of the European Union. Medical
Devices Regulation 2017/745 (“MDR”) replaced MDD on May 26, 2020 and provides for increased responsibility, and accordingly
increased risk, for authorized representatives. As authorized representative, we act on behalf of medical device manufacturers in
relation to specified tasks with regard to their obligations under MDR.

We also act as legal representative pursuant to MDD and AIMD, and will continue to do so pursuant to MDR, for certain
clients who are located outside of the European Union with respect to clinical trials being carried out by those clients in the
European Union. As legal representative, we are responsible for ensuring compliance with the client’s obligations pursuant to
MDR and we are the addressee for all communications with the client provided for under MDR.

We provide these services subject to certain terms and conditions which are contained in our agreements with clients
pertaining to these services. We aim to reduce any potential liability associated with these activities by seeking contractual
indemnification from our clients and by maintaining an appropriate level of insurance cover. However, there is no guarantee that
the specific insurance will be available or that a client will fulfill its obligations in relation to their indemnity.

We rely on third parties to provide certain data and other information to us. Our suppliers or providers might increase
our cost to obtain, restrict our use of or refuse to license data, which could lead to our inability to access certain data
or provide certain services and, as a result, materially and adversely affect our operating results and financial
condition.

Our services are derived from, or include, the use of data we collect from third parties. We have several data suppliers

that provide us with a broad and diverse scope of information that we collect, use in our business and sell.

We generally enter into long-term contractual arrangements with many of our data suppliers. At the time we enter into a
new data supply contract or renew an existing contract, suppliers may increase our cost to obtain and use the data provided by
such supplier, increase restrictions on our ability to use or sell such data, or altogether refuse to license the data to us. Also, our
data suppliers may fail to meet or adhere to our quality control standards or fail to deliver the data to us. Although no single
supplier is material to our business, if suppliers that collectively provide a significant amount of the data we receive or use were
to increase our costs to obtain or use such data, further restrict our access to or use of such data, fail to meet or adhere to our
quality control standards, refuse to provide or fail to deliver data to us, our ability to provide data-dependent services to our
clients may be adversely impacted, which could have a material adverse effect on our business, results of operations, financial
condition or cash flow.

We rely on third parties for important products, services and licenses to certain technology and intellectual property
rights, if there was failure in delivery by these parties, we might not be able to continue to obtain such products,
services and licenses.

We depend on certain third parties to provide us with products and services critical to our business. Such services
include, among others, suppliers of drugs for patients participating in trials, suppliers of kits for use in our laboratories, suppliers
of reagents for use in our testing equipment and providers of maintenance services for our equipment. The failure of any of these
third parties to adequately provide the required products or services, or to do so in compliance with applicable regulatory
requirements, could have a material adverse effect on our business.

Some of our services rely on intellectual property, technology and other similar property owned and/or controlled by
third parties. Our licenses to this property and technology could terminate or expire and we might not be able to replace these
licenses in a timely manner. Also, we might not be able to renew these licenses on similar terms and conditions. Failure to renew
these licenses, or renewals of these licenses on less advantageous terms, could have a material adverse effect on our business,
results of operations, financial condition or cash flow.

Risk Related to Our Industry

We are dependent upon the ability and willingness of the pharmaceutical, biotechnology and medical device companies
to continue to spend on research and development and to outsource the services that we provide. We are therefore subject to
risks, uncertainties and trends that affect companies in these industries that we do not control. We have benefited to date from
the tendency of pharmaceutical, biotechnology and medical device companies to outsource clinical research projects. Any
downturn in these industries or reduction in spending or outsourcing could materially adversely affect our business. The following
could each result in such a downturn:

•

if pharmaceutical, biotechnology or medical device companies expanded upon their in-house clinical or development
capabilities, they would be less likely to utilize our services;
if governmental regulations were changed, it could affect the ability of our clients to operate profitably, which may
lead to a decrease in research spending and therefore this could have a material adverse effect on our business;
and
if unfavorable economic conditions or disruptions in the credit and capital markets negatively impacted our clients.

Large pharmaceutical companies are increasingly consolidating their vendor base and entering strategic partnership
arrangements with a limited number of outsource providers.

Large pharmaceutical companies are continually seeking to drive efficiencies in their development processes to both
reduce costs associated with the development of new drug candidates and accelerate time to market. As a result, large
pharmaceutical companies, in particular, are increasingly looking to consolidate the number of outsource providers with which
they engage, with many entering strategic partnership arrangements with a limited number of outsource providers. The failure to
enter strategic partnership arrangements with customers or the loss of existing customers as a result of them entering strategic
partnership arrangements with our competitors could have a material adverse impact on our results of operations.

Increased collaboration amongst pharmaceutical companies in research and development activities may lead to fewer
research opportunities.

Certain pharmaceutical companies have begun to collaborate in seeking to develop new drug candidates. Increased
collaboration amongst pharmaceutical companies may lead to fewer research opportunities, which in turn may lead to fewer
outsource opportunities for companies within the CRO industry. A reduction in outsource opportunities as a result of this
increased collaboration could have a material adverse impact on our results of operations.

We operate in a highly competitive and dynamic market.

The CRO industry is highly competitive. In particular, we compete with other large global CROs for strategic
relationships with large pharmaceutical companies. If we are unable to retain and renew existing strategic relationships and win
new strategic relationships, there could be a material adverse impact on our results. Similarly, we compete with other CROs for
work which comes outside of these strategic relationships and being unable to win work outside of these strategic relationships
would have a material adverse impact on our results.

The type and depth of services provided by CROs has changed in recent years. Failure to develop and market new

services or expand existing service offerings could adversely affect our business and operations.

New entrants may also enter the market which would further increase competition and could adversely affect our

business and operations.

We may be adversely affected by industry, customer or therapeutic concentration.

We provide services to biopharmaceutical, biotechnology, medical device and government organizations and our
revenue is dependent on expenditures by these customers. Our business could therefore be adversely impacted by mergers,
consolidation, business failures, distress in financial markets or other factors resulting in a decrease in the number of potential
customers or therapeutic products being developed through the drug development progress. There has been consolidation in the
biopharmaceutical market in recent years. If the number of our potential customers were to decline in the future, they may be
able to negotiate price discounts or other terms for services that are less favorable to us than they have been historically.

14Risk Related to Our Financial Results and Financial Position

things,

the number and scope of ongoing client projects,

Our results of operations in any quarter can fluctuate or differ from expected or forecast results depending upon or due
to, among other
the commencement, postponement,
variation, cancellation or termination of projects in a quarter, the mix of activity, cost overruns, employee hiring, employee attrition
and other factors. Our revenue in any period is directly related to the number of employees who were working on billable projects
together with investigator activity during that period. We may be unable to compensate for periods of under-utilization during one
part of a fiscal period by earning revenue during another part of that period. We believe that operating results for any particular
quarter are not necessarily a meaningful indicator of future results.

Also, if in future quarters, we are unable to continue to deliver operational efficiencies and our expenses grow faster

than our revenues, our operating margins, profitability and overall financial condition may be materially adversely impacted.

Our exposure to exchange rate fluctuations could adversely affect our results of operations.

Our contracts with clients are sometimes denominated in currencies other than the currency in which we incur expenses
related to such contracts. Where expenses are incurred in currencies other than those in which contracts are priced, fluctuations
in the relative value of those currencies could have a material adverse effect on our results of operations.

In addition, we are also subject to translation exposures as our consolidated financial results are presented in U.S.
dollars, while the local results of a certain number of our subsidiaries are prepared in currencies other than U.S. dollars,
including, amongst others, the pound sterling and the euro. Accordingly, changes in exchange rates between the U.S. dollar and
those other currencies will affect the translation of subsidiary companies' financial results into U.S. dollars in reporting our
consolidated financial results.

Our effective tax rate may fluctuate from quarter-to-quarter, which may adversely affect our results of operations.

Our quarterly effective tax rate has depended and will continue to depend on the geographic distribution of our taxable
earnings amongst the multiple tax jurisdictions in which we operate and the tax law in those jurisdictions. Changes in the
geographic mix of our results of operations amongst these jurisdictions may have a significant impact on our effective tax rate
from quarter to quarter. As a result of the Merger and associated transaction and integration costs, the effective tax rate may
fluctuate, which may have a significant impact on our financial results. Changes in tax law in one or more jurisdictions could also
have a significant impact on our tax rate and results. In addition, as we operate in multiple tax jurisdictions, we may be subject to
audits in certain jurisdictions. These audits may involve complex issues which could require an extended period of time for
resolution. The resolution of audit issues may lead to differences, additional taxes, fines or penalties which could have a material
adverse impact on our effective tax rate and our consolidated financial results.

Our unsatisfied performance obligation may not convert to revenue and the rate of conversion may slow.

Our unsatisfied performance obligation is the amount of awards that has not yet converted to revenue. This value is not
necessarily a meaningful predictor of future results due to the potential for the cancellation or delay of projects included in the
unsatisfied performance obligation. No assurances can be given that we will be able to realize this unsatisfied performance
obligation in full as revenue. A failure to realize these awards could have a material adverse impact on our results of operations.
In addition, as the length and complexity of projects increases, the rate at which awards convert to revenue may be slower than
in the past. A significant reduction in the rate of conversion could have a material impact on our results of operations.

The Company is exposed to various risks in relation to our cash and cash equivalents and short term investments.

The Company’s treasury function manages our available cash resources and invests significant cash balances in
various financial institutions to try to ensure optimum returns for our surplus cash balances. These balances are classified as
cash and cash equivalents or short term investments depending on the maturity of the related investment. Cash and cash
equivalents comprise cash and highly liquid investments with maturities of three months or less. Short term investments
comprise highly liquid investments with maturities of greater than three months and minimum “A-” rated fixed and floating rate
securities.

Given the global nature of our business, we are exposed to various risks in relation to these balances including liquidity
risk, credit risk associated with the counterparties with whom we invest, interest rate risk on floating rate securities, sovereign risk
(our principle sovereign risk relates to investments in U.S. Treasury funds) and other factors.

Although we have not recognized any significant losses to date on our cash and cash equivalents or short term
investments, any significant declines in their market values could have a material adverse effect on our financial position and
operating results.

Changes in accounting standards may adversely affect our financial statements.

We prepare our financial statements in accordance with generally accepted accounting principles in the United States of
America ("US GAAP") which are revised on an on-going basis by the authoritative bodies. It is possible that future accounting
standard updates may require changes to the accounting treatment that we apply in preparation of our financial statements.
These changes may also require significant changes to our reporting systems. These updates may result in unexpected
variability in the timing of recognition of revenue or expenses and therefore in our operating results.

Risk Related to Political, Legal or Regulatory Environment

We may lose business opportunities as a result of healthcare reform and the expansion of managed care organizations.

Numerous governments, including the U.S. government, have undertaken efforts to control growing healthcare costs
through legislation, regulation and voluntary agreements with medical care providers and drug companies. If these efforts are
successful, pharmaceutical, biotechnology and medical device companies may react by spending less on research and
development and therefore this could have a material adverse effect on our business.

In addition to healthcare reform proposals, the expansion of managed care organizations in the health care market may
result in reduced spending on research and development. Managed care organizations' efforts to cut costs by limiting
expenditures on pharmaceuticals and medical devices could result in pharmaceutical, biotechnology and medical device
companies spending less on research and development. If this were to occur, we would have fewer business opportunities and
our revenues could decrease, possibly materially.

Healthcare reform legislation, other changes in the healthcare industry and in healthcare spending could adversely
affect our business model, financial condition or results of operations.

Our results of operations and financial conditions could be affected by changes in healthcare spending and policy. The
healthcare industry is subject to changing political, regulatory and other influences. It is possible that legislation will be introduced
and passed in the United States repealing, modifying or invalidating the current healthcare reform legislation, in whole or in part,
and signed into law. Because of the continued uncertainty about the implementation of the current healthcare reform legislation,
including the potential for further legal challenges or repeal of that legislation, we cannot quantify or predict with any certainty the
likely impact of the current healthcare reform legislation or its repeal on the healthcare sector, on our customers and ultimately on
our financial condition or results of operations.

The unrest in Eastern Europe could adversely affect our results of operations.

The current unrest in Eastern Europe has led to, among other things, hardship and the imposition of international
economic sanctions aimed at the region. While the situation is subject to change, there remains the possibility of additional and
harsher sanctions if the conflict intensifies. If that were to happen, our operations in the region may be severely curtailed or
eliminated, which could adversely affect our results of operations. In addition, if the current unrest broadens or further escalates,
our operations may be severely curtailed, which could adversely affect our results of operations.

We may lose business as a result of changes in the regulatory environment.

Various regulatory bodies throughout the world may enact legislation, rules and guidance which could introduce
changes to the regulatory environment for drug development and research. The adoption and implementation of such legislation,
rules and guidance is difficult to predict and therefore could have a material adverse effect on our business.

16
Failure to comply with the regulations and requirements of the U.S. Food and Drug Administration and other regulatory
authorities could result in substantial penalties and/or loss of business.

The U.S. Food and Drug Administration, ("FDA"), and other regulatory and government authorities and agencies inspect
and audit us from time to time to ensure that we comply with their regulations and guidelines, including environmental, health and
safety matters, and other requirements imposed in connection with the performance of government contracts. We must comply
with the applicable regulatory requirements governing the conduct of clinical trials and contracting with the government in all
countries in which we operate. If we fail to comply with any of these requirements we could suffer some or all of:

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termination of or delay in any research;
disqualification of data;
denial of the right to conduct business;
criminal penalties;
financial penalties;
other enforcement actions including debarment from government contracts;
loss of clients and/or business; and
litigation from clients and/or patients and/or regulatory authorities and/or other affected third parties, and
resulting material penalties, damages and costs.

We are subject to political, regulatory, operational and legal risks associated with our international operations.

We are one of a small group of organizations with the capability and expertise to conduct clinical trials on a global basis.
We believe that this capability to provide our services globally in most major and developing pharmaceutical markets enhances
our ability to compete for new business from large multinational pharmaceutical, biotechnology and medical device companies.
We have expanded geographically in the past and intend to continue expanding in regions that have the potential to increase our
client base or increase our investigator and patient populations. We expect that revenues earned in emerging markets will
continue to account for an increasing portion of our total revenues. However, emerging market operations may present several
risks, including civil disturbances, health concerns, cultural differences such as employment, regulatory and business practices,
compliance with economic sanctions, laws and regulations, volatility in gross domestic product, economic and governmental
instability, the potential for nationalization of private assets and the imposition of exchange controls. In addition, operating
globally means the Company faces the challenges associated with coordinating its services across different countries, time
zones and cultures.

Changes in the political and regulatory environment in the international markets in which we operate such as price or
exchange controls could impact our revenue and profitability and could lead to penalties, sanctions and reputational damages if
we are not compliant with those regulations. Political uncertainty and a lack of institutional continuity in some of the emerging,
developing or other countries in which we operate could affect the orderly operation of markets in these economies. In addition,
in countries with a large and complicated structure of government and administration, national, regional, local and other
governmental bodies may issue inconsistent decisions and opinions that could increase our cost of regulatory compliance and/or
have a material adverse effect on our business.

Uncertainty of the legal environment in some emerging countries could also limit our ability to enforce our rights. In
certain emerging and developing countries we enjoy less comprehensive protection for some of our rights, including intellectual
property rights, which could undermine our competitive position. Proceedings to enforce our future patent rights, if any, in foreign
jurisdictions could result in substantial cost and divert our efforts and attention from other aspects of our business.

If any of the above risks or similar risks associated with our international operations were to materialize, our results of

operations and financial condition could be materially adversely affected.

We operate in many different jurisdictions and we could be adversely affected by violations of anti-corruption laws,
including the United States Foreign Corrupt Practices Act of 1977 ("FCPA"), UK Bribery Act of 2010 ("Bribery Act") and
similar anti-corruption laws in other jurisdictions as well as laws and regulations relating to trade compliance and
economic sanctions.

The FCPA, UK Bribery Act of 2010 and similar anti-corruption laws in other jurisdictions prohibit us and our officers,
directors, employees and third parties acting on our behalf, including agents, from corruptly offering, promising, authorizing, or
providing anything of value to a "foreign official" for the purposes of influencing official decisions or obtaining or retaining
business or otherwise obtaining favorable treatment. In addition, the FCPA imposes certain books, records and accounting
control obligations on public companies and other issuers. The UK Bribery Act also prohibits "commercial" bribery and accepting
bribes.

Our global business operations also must be conducted in compliance with applicable export controls and economic
sanctions laws and regulations, including those administered by the U.S. Department of the Treasury’s (the “U.S. Treasury”)
Office of Foreign Assets Control, the U.S. Department of State, the U.S. Department of Commerce, the United Nations Security
Council, the European Union, Her Majesty’s Treasury and other relevant sanctions authorities.

17Our internal policies mandate compliance with these anti-corruption and economic sanctions laws. We also operate in
many jurisdictions in which bribery or corruption can be common and compliance with anti-bribery laws may conflict with local
customs and practices. Despite our training and compliance program safeguards, we cannot assure that our internal control
policies, procedures and safeguards will protect us from acts in violation of anti-corruption and economic sanctions laws
committed by employees or other third parties associated with us and our continued expansion, including in developing
countries, could increase such risk in the future. Violations of anti-corruption and economic sanctions laws, or even allegations of
such violations, could disrupt our business and result in a material adverse effect on our financial condition, results of operations,
cash flows and reputation. For example, violations of anti-corruption and economic sanctions laws can result in restatements of,
or irregularities in, our financial statements, disgorgement of profits, related stockholder lawsuits as well as severe criminal or
civil sanctions. In some cases, companies that violate anti-corruption and economic sanctions laws might be debarred by the
U.S. government and/or lose their U.S. export privileges. In addition, the U.S. government or other governments may seek to
hold us liable for successor liability of anti-corruption and economic sanctions laws committed by companies that we acquire or in
which we invest. Changes in anti-corruption and economic sanctions laws or enforcement priorities could also result in increased
compliance requirements and related costs which could materially adversely affect our business, financial condition, results of
operations and cash flows.

Current and proposed laws and regulations regarding the protection of personal data could result in increased risks of
liability or increased costs to us or could limit our service offerings.

The confidentiality, collection, use and disclosure of personal data, including clinical trial patient-specific information, is
subject to governmental regulation generally in the country that the personal data was collected or used. For example, United
States federal regulations under the Health Insurance Portability and Accountability Act of 1996, or ("HIPAA"), and as amended
in 2014 by the Health Information Technology for Economic and Clinical Health (“HITECH”) Act, require individuals’ written
authorization, in addition to any required informed consent, before Protected Health Information may be used for research.
HIPAA specifies standards for de-identifications and for limited data sets. We are both directly and indirectly affected by the
privacy provisions surrounding individual authorizations because many investigators and organizations with whom we are
involved in clinical trials and in our services are directly subject to them as a HIPAA “covered entity” and because we obtain
identifiable health information from third parties that are subject to such regulations. As there are some instances where we are a
HIPAA “business associate” of a “covered entity”, we can also be directly liable to the covered entity for mishandling protected
health information and, under HIPAA’s enforcement scheme, we can be subject to up to $1.5 million per year in civil penalties for
each HIPAA violation.

The European data protection framework was significantly revised in 2018 with the coming into force of the General
Data Protection Regulation ('GDPR') containing new provisions specifically directed at the processing of health information,
including sanctions of up to 4% of worldwide gross revenue and extra-territoriality measures intended to bring non-EU
companies under the proposed regulation. After GDPR implementation, we are receiving increased volumes and breadth of data
protection/privacy queries from both sponsors and strategic alliance partners and anticipate that this will continue.

For the regulators in the European Union, or ("EU"), personal data includes any information that relates to an identified
or identifiable natural person with health information carrying special obligations, including obtaining the explicit consent from the
individual for collection, use or disclosure of the information. EU regulations also apply to the personal data of EU data subjects
traveling or living outside the EU. In addition, we are subject to EU rules with respect to cross-border transfers of such data out of
the EU. The United States, the EU and its member states and other countries where we have operations, such as Japan, South
Korea, Malaysia, the Philippines, Russia and Singapore, continue to issue new privacy and data protection rules and regulations
that relate to personal data and health information. Failure to comply with certain certification/registration and annual re-
certification/registration provisions associated with these data protection and privacy regulations and rules in various
jurisdictions, or to resolve any serious privacy complaints, could subject us to regulatory sanctions, criminal prosecution or civil
liability. Federal, state and foreign governments are contemplating, have proposed or have adopted additional legislation
governing the collection, possession, use or dissemination of personal data, such as personal health information and personal
financial data as well as security breach notification rules for loss or theft of such data. Additional legislation or regulation of this
type might, among other things, require us to implement new security measures and processes or bring within the legislation or
regulation de-identified health or other personal data, each of which may require substantial expenditures or limit our ability to
offer some of our services. Additionally, if we violate applicable laws, regulations or duties relating to the use, privacy or security
of personal data, we could be subject to civil liability or criminal prosecution, be forced to alter our business practices or suffer
reputational harm.

18Our employees may engage in misconduct or other improper activities, including noncompliance with regulatory
standards and requirements, which could have a material adverse effect on our business.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees could include intentional
failures to comply with governmental regulations, comply with federal and state health-care fraud and abuse laws and
regulations, report financial information or data accurately or disclose unauthorized activities to us. In particular, sales, marketing
and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud,
kickbacks, self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing,
discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements.
Employee misconduct could also involve the improper use of information obtained in the course of clinical studies or data or
documentation fraud or manipulation, which could result in regulatory sanctions and serious harm to our reputation. It is not
always possible to identify and deter employee misconduct, and the precautions we take to detect and prevent misconduct may
not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or
other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. If any such actions are
instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a
significant impact on our business and results of operations, including the imposition of significant fines or other sanctions.

The failure to comply with our government contracts or applicable laws and regulations could result in, among other
things, fines or other liabilities, and changes in procurement regulations could adversely impact our business, results
of operations or cash flows.

Revenues from our government customers are derived from sales to federal, state and local governmental departments
and agencies through various contracts. Sales to public segment customers are highly regulated. Noncompliance with contract
provisions, government procurement regulations or other applicable laws or regulations (including but not limited to the False
Claims Act) could result in civil, criminal and administrative liability, including substantial monetary fines or damages, termination
of government contracts or other public segment customer contracts, and suspension, debarment or ineligibility from doing
business with the government and other customers in the public segment. In addition, generally contracts in the public segment
are terminable at any time for convenience of the contracting agency or upon default. The effect of any of these possible actions
by any governmental department or agency could adversely affect our business, results of operations or cash flows. In addition,
the adoption of new or modified procurement regulations and other requirements may increase our compliance costs and reduce
our gross margins, which could have a negative effect on our business, results of operations or cash flows.

Liability claims brought against us could result in payment of substantial damages, costs and liabilities and decrease
our profitability.

We may face legal claims involving stockholders, consumers, clinical trial subjects, competitors, regulators and other
parties. As described in 'Legal Proceedings' in Part A, Item 8 of this Form 20-F, we are engaged in legal proceedings. Litigation
and other legal proceedings are inherently uncertain, and adverse rulings could occur, including monetary damages, or an
injunction stopping us from engaging in business practices, or requiring other remedies, including, but not limited to, compulsory
licensing of patents. In addition, the combined Company may be exposed to increased litigation from stockholders, customers,
suppliers, consumers and other third parties due to the combination of ICON’s business and PRA’s business following the
Merger.

Customer Claims
If we breach the terms of an agreement with a customer (for example if we fail to comply with the agreement, all
applicable regulations or Good Clinical Practice) this could result in claims against us for substantial damages which could have
a material adverse effect on our business. As we provide staff to deliver our services, there is a risk that our management, quality
and control structures fail to quickly detect a failure by one or more employees or contractors to comply with all applicable
regulations and Good Clinical Practice and our internal requirements and standard operating procedures thereby exposing us to
the risk of claims by customers.

Claims relating to Investigators
We contract with physicians who serve as investigators in conducting clinical trials to test new drugs on their patients.
These patients will generally have underlying health conditions and this testing creates the risk of liability for personal injury to
the patient or the risk of a serious adverse event occurring. Although investigators are generally required by law to maintain their
own liability insurance, we could be named in lawsuits and incur expenses arising from any professional malpractice or other
actions brought against the investigators with whom we contract.

Indemnification from Customers
Indemnifications provided by our customers against the risk of liability for personal injury to or death of the patients
arising from a study drug vary from customer to customer and from trial to trial and may not be sufficient in scope or amount, or
our customer may not have the financial ability to fulfill their indemnification obligations. Furthermore, we would be liable for our
own negligence and negligence of our employees which could lead to litigation from customers or action or enforcement by
regulatory authorities.

Insurance
We maintain what we believe is an appropriate level of worldwide Professional Liability/Error and Omissions Insurance.
In the future we may be unable to maintain or continue our current insurance coverage on the same or similar terms. If we are
liable for a claim or settlement that is beyond the level of insurance coverage, we may be responsible for paying all or part of any
award or settlement amount. Also, the insurance policies contain exclusions which mean that the policy will not respond or
provide cover in certain circumstances.

Claims to Date
To date, we have not been subject to any liability claims that are expected to have a material effect on our business;
however, there can be no assurance that we will not become subject to such claims in the future or that such claims will not have
a material effect on our business.

Environmental, social and governance matters may impact our business and reputation.

Increasingly, in addition to the importance of their financial performance, companies are being judged by their
performance on a variety of environmental, social and governance ('ESG') matters, which are considered to contribute to the
long-term sustainability of companies’ performance. A variety of organizations measure the performance of companies on such
ESG topics, and the results of these assessments are widely publicized. Customer's may have specific ESG related
requirements or targets and if we fail to meet these targets we may lose business. In addition, investment in funds that specialize
in companies that perform well in such assessments are increasingly popular, and major institutional investors have publicly
emphasized the importance of such ESG measures to their investment decisions. Topics taken into account in such
assessments include, among others, the Company’s efforts and impacts on climate change and human rights, ethics and
compliance with law, and the role of the Company’s board of directors in supervising various sustainability issues. We actively
manage a broad range of such ESG matters, taking into consideration their expected impact on the sustainability of our business
over time, and the potential impact of our business on society and the environment. However, in light of investors’ increased
focus on ESG matters, there can be no certainty that we will manage such issues successfully, or that we will successfully meet
society’s perceived expectations as to our proper role. Any failure or perceived failure by us in this regard could have a material
adverse effect on our reputation and on our business, share price, financial condition, or results of operations, including the
sustainability of our business over time.

Risk Related to Our Indebtedness

We have incurred substantial additional indebtedness in connection with the Merger, which could impair our flexibility
and access to capital and could adversely affect the combined Company’s business, financial condition or results of
operations.

Following completion of the Merger and the other transactions contemplated by the Merger Agreement, the Company
has a substantial amount of debt. ICON borrowed approximately $6,015 million in order to pay PRA stockholders the cash
consideration due to them as merger consideration under the Merger Agreement, pay related fees and transaction costs in
connection with the transactions, and refinance existing indebtedness. This increased level of borrowings could adversely affect
the Company in a number of ways, including, but not limited to, by placing us at a competitive disadvantage compared to our
competitors that have less debt, causing us to incur substantial fees from time to time in connection with debt amendments or
refinancing, making it more difficult for the Company to satisfy its obligations with respect to its debt or to its trade or other
creditors, requiring a substantial portion of the Company’s cash flows from operations for the payment of interest on the
Company’s debt, reducing the Company’s flexibility to respond to changing business and economic conditions, and reducing
funds available for the Company’s investments in research and development, capital expenditures and other activities. If ICON
cannot service its debt, it may have to take actions such as selling assets, seeking additional debt or equity, or reducing or
delaying capital expenditures, strategic acquisitions, investments and alliances.

In addition, ICON’s increased level of indebtedness could adversely affect ICON’s credit rating, which could result in
increased borrowing costs for the Company in the future. No assurances can be made that ICON will be able to refinance any
indebtedness incurred in connection with the Merger on terms acceptable to it or at all.

Covenants in our credit agreement and the indenture governing the Senior Secured Notes may restrict our business
and operations. Our financial condition and results of operations could be adversely affected if we do not comply with
those covenants.

The Senior Secured Credit Facilities and the indenture include certain customary covenants that limit our ability to,

amongst other things, subject to certain exceptions:

• make dividends, investments and other restricted payments;
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enter into sale and leaseback transactions;
incur or assume liens or additional debt;
dispose of assets;
engage in mergers or reorganizations; or
enter into certain types of transactions with affiliates.

The revolving credit facility also includes a financial covenant that requires us to comply with a maximum consolidated

leverage ratio. Our ability to comply with this financial covenant may be affected by events beyond our control.

Interest rate fluctuations may materially adversely affect our results of operations and financial conditions due to the
variable interest rate on our senior secured term loan facility, in the event that the Company draws down on the
revolving credit facility or in respect of any future issuances of debt.

The interest rate margin applicable to borrowings under the revolving loan facility will be, at the option of the borrower,
either (i) the applicable base rate plus an applicable margin of 1.00%, 0.60% or 0.25% based on ICON’s current corporate family
rating assigned by S&P of BB- (or lower), BB or BB+ (or higher), respectively, or (ii) LIBOR (or an alternative reference rate) plus
an applicable margin of 2.00%, 1.60% or 1.25% based on ICON’s current corporate family rating assigned by S&P of BB- (or
lower), BB or BB+ (or higher), respectively. In addition, lenders of under the revolving loan facility are entitled to commitment fees
as a percentage of the applicable margin at the time of drawing and utilization fees dependent on the proportion of the facility
drawn. At December 31, 2021, no amounts have been drawn under the revolving loan facility with the exception of $4.1 million
letters of credit given to landlords to guarantee lease arrangements.

We continue to monitor the phasing out of LIBOR. We have engaged with our lenders on the implications of the change
and will continue to discuss with them as replacement rates for LIBOR become more prevalent in the syndicated lending market.
The Company is therefore subject to interest rate volatility in respect of the senior secured term loan facility, any future draw
down on the Revolving Credit Facility or in respect of any future issuances of debt.

The phasing out of LIBOR may affect our interest expense with respect to borrowings under the Senior Secured
Facilities.

On July 27, 2017, the U.K. Financial Conduct Authority (the “FCA”) announced that it intends to end the use of LIBOR
effective after December 31, 2021 as the benchmark rate that many banks and issuers use to set interest rates for loans,
securities, derivative contracts and other financial instruments. Recognizing the need to replace LIBOR, authorities in the United
States convened the Alternative Reference Rates Committee (“ARRC”) in 2014 to identify a replacement for LIBOR with respect
to indebtedness denominated in U.S. Dollars. In 2017, the ARRC identified the Secured Overnight Financing Rate (“SOFR”), and
in April 2018, the Federal Reserve Bank of New York began publishing SOFR. SOFR is a measure of the cost of borrowing cash
overnight, collateralized by U.S. Treasury securities, and is based on directly observable U.S. Treasury-backed repurchase
transactions. Although the U.S. Treasury-backed overnight repo market is highly liquid, there is currently no robust market for
determining forward-looking, SOFR term rates. Because SOFR is an overnight risk-free rate, whereas LIBOR has various terms
and an embedded credit charge, the transition from LIBOR to SOFR will require adjustments, which may continue to vary for
certain forms of indebtedness and financial instruments as the relevant markets adapt to SOFR’s implementation. Similar
alternative benchmark replacements will be required to be implemented in respect of indebtedness and other financial
instruments that are currently based on LIBOR quotes for currencies other than the U.S. Dollar.

The credit agreement governing the Senior Secured Credit Facilities provides that borrowings denominated in U.S.
Dollars will bear interest based on LIBOR or the base rate (as elected by the borrower), plus an applicable margin. The credit
agreement also provides that LIBOR may be replaced by a SOFR-based rate for borrowings in U.S. Dollars upon (i) the FCA
ceasing to provide LIBOR for U.S. Dollars or announcing that LIBOR is no longer representative or (ii) an early election by the
Company and the administrative agent under our credit agreement to transition from LIBOR. We will continue to work with the
administrative agent and other lenders to determine whether, and when, we expect to transition to a SOFR-based rate prior to

21LIBOR being formally phased out for the applicable tenors. This transition may impact our interest expense with respect to
borrowings under the Senior Secured Credit Facilities. In addition, the phase-out of LIBOR may impact the financial markets as
a whole. As such, the consequences of the phase-out of LIBOR cannot be entirely predicted at this time.

Risk Related to Our Common Stock

Volatility in the market price of our common stock could lead to losses by investors.

The market price of our common stock has experienced volatility in the past and may experience volatility in the future
which could lead to losses for investors. Factors impacting volatility in the market price of our common stock include, amongst
others:

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general market and economic conditions;
our results of operations;
issuance of new or changed securities analysts’ reports or recommendations;
developments impacting the industry or our competitors;
declines in the market prices of stocks generally;
strategic actions by us or our competitors;
announcements by us or our competitors of significant contracts, new products, acquisitions, joint marketing
relationships, joint ventures, other strategic relationships or capital commitments;
the public's reaction to press releases, other public announcements by us or third parties, including our filings
with the SEC;
guidance, if any, that we provide to the public, any changes in this guidance or failure to meet this guidance;
changes in the credit rating of our debt;
sale, or anticipated sale, of large blocks of our stock;
additions or departures of key personnel;
regulatory or political developments;
litigation and governmental investigations;
changing economic conditions;
exchange rate fluctuations;
changes in accounting principles; and
other events or factors, including those resulting from natural disasters, war, acts of terrorism or responses to
those events.

In addition, stock markets have from time to time experienced significant price and volume fluctuations unrelated to the
operating performance of particular companies. Future fluctuations in stock markets may lead to volatility in the market price of
our common stock which could lead to losses by investors.

If securities analysts or industry analysts do not publish reports about our business or if they downgrade our stock or
our sector, our stock price and trading volumes could decline.

The trading market for common stock depends in part on the research and reports that industry or financial analysts
publish about us, our business or industry. We do not control these analysts. If one or more of the analysts who do cover us
downgrade our stock or our industry or the stock of any of our competitors, or publish inaccurate or unfavorable research about
our business or industry, the price of our stock could decline. If one or more of these analysts ceases coverage of us or fails to
publish reports on us regularly, we could lose visibility in the market, which in turn could cause our stock price or trading volume
to decline.

Investment returns may be reduced if we lose our foreign private issuer status.

We are a “foreign private issuer,” as such term is defined in Rule 405 under the U.S. Securities Act 1933, and, therefore,
we are not required to file quarterly reports on Form 10-Q or current reports on Form 8-K with the SEC. In addition, the proxy
rules and Section 16 reporting and short-swing profit recapture rules are not applicable to us. If we lose our status as a foreign
private issuer by our election or otherwise and we become subject to the full reporting regime of the United States securities
laws, we will be subject to additional reporting obligations and proxy solicitation obligations under the Exchange Act and our
officers, directors and 10% shareholders would become subject to the short-swing profit rules. The imposition of these reporting
rules would increase our costs and the obligations of those affected by the short-swing rules.

We do not expect to pay any cash dividends for the foreseeable future.

We currently do not expect to declare dividends on our common stock and have not done so in the past. We continue to
anticipate that our earnings will be used to provide working capital, to support operations, to make debt repayments and to
finance the growth and development of our business. They may also be used to continue our share repurchase program. Any
determination to declare or pay dividends in the future will be at the discretion of our board of directors, subject to relevant laws
and dependent on a number of factors, including our earnings, capital requirements and overall financial condition. Therefore,
the only opportunity for stockholders to achieve a return on their investment may be if the market price of our common stock
appreciates and shares are sold at a profit. The market price for our common stock may not appreciate and may fall below the
price stockholders paid for such common stock.

A future transfer of ICON ordinary shares, other than one effected by means of the transfer of book entry interests in
the Depositary Trust Company ("DTC"), may be subject to Irish stamp duty.

Transfers of ICON ordinary shares effected by means of the transfer of book entry interests in the Depositary Trust
Company ("DTC") should not be subject to Irish stamp duty where ICON ordinary shares are traded through DTC, either directly
or through brokers that hold such shares on behalf of customers through DTC. However, if ICON ordinary shares are held as of
record rather than beneficially through DTC, any transfer of ICON ordinary shares could be subject to Irish stamp duty (currently
at the rate of 1% of the higher of the price paid or the market value of the shares acquired). Payment of Irish stamp duty is
generally a legal obligation of the transferee. The potential for Irish stamp duty to arise could adversely affect the price of ICON
ordinary shares.

Item 4. Information on the Company.

A. History and development

ICON public limited company (“ICON plc”) is a clinical research organization (“CRO”), founded in Dublin, Ireland in
1990. Over thirty years we have grown significantly to become a leading global provider of outsourced development and
commercialization services to pharmaceutical, biotechnology, medical device and government and public health organizations.
Our mission is to improve the lives of patients by accelerating the development of our customers’ drugs and devices through
innovative solutions.

We are a public limited company in Ireland and operate under the Irish Companies Acts. Our principal executive office is
located at: South County Business Park, Leopardstown, Dublin 18, Republic of Ireland. The contact telephone number of this
office is +353 1 2912000. Our website is www.iconplc.com. Additionally, the SEC maintains a website (www.sec.gov) that
contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

Our service offering includes clinical development, functional outsourcing and laboratory services. Our clinical
development services include all phases of development (Phases I-IV), peri and post approval, data solutions and site and
patient access services. Our laboratory services include a range of high value testing services, including bionanalytical,
biomarker, vaccine, good manufacturing practice ('GMP') and central laboratory services. We also offer full-service and functional
service partnerships to our customers.

Since ICON was founded, the Company has expanded through organic growth, together with a number of strategic
acquisitions to enhance its expertise and capabilities in certain areas of the clinical development process and to broaden the
service portfolio and add scale to existing services. On July 1, 2021, the Company completed the Acquisition of PRA which has
transformed the scale and capabilities of the Company. The combined Company leverages its enhanced operations to transform
clinical trials and accelerate biopharma customers’ commercial success through the development of much needed medicines
and medical devices. The combined Company retained the name ICON and brought together approximately 38,000 (as at the
Merger date) employees across the globe, creating one of the world’s most advanced healthcare intelligence and clinical
research organizations.

23 Recent investments, which continue to strengthen our service offerings to meet the needs of our customers include:

•

On July 1, 2021, the Company completed the Acquisition of PRA by means of a merger whereby Indigo Merger
Sub, Inc., a Delaware corporation and subsidiary of ICON, merged with and into PRA Health Sciences, Inc., the
parent of the PRA Health Sciences Group ("the Acquisition" and "the Merger"). Upon completion of the Acquisition,
PRA became a wholly owned subsidiary within the ICON Group. ICON’s Acquisition of PRA has brought together
two high-quality, innovative, growing organizations with similar cultures and values to create one of the world’s
leading healthcare intelligence and clinical contract research organizations. The total value of the Merger
consideration is $12.0 billion and has resulted in the recognition of goodwill of $8.1 billion, intangible assets of
$4.9 billion and an associated deferred tax liability of $1.1 billion.

With approximately 38,330 employees across the globe, the new ICON has established relationships with a
majority of the world’s top pharmaceutical and biotech companies. We believe the Company now has the expertise,
technology, and data assets to lead the industry into a new paradigm for bringing clinical research to more patients
and enabling expanded capabilities for customers. We believe the Merger will deliver a transformational effect on
ICON through:

Scale: With a deeper clinical, commercialization and consulting services portfolio, a broader geographic
footprint, depth in therapeutic expertise, and data-driven healthcare technology, the Company can deliver
enhanced globally scaled expertise & solutions for all customers and patients.

Focus: The Company will have a singular focus on clinical research and commercialization, leveraging
transformational technology and innovation to execute clinical trials from Phase 1 to post-approval studies with
the highest quality, expertise and speed.

Speed to market: Our extensive services portfolio, digital and data technology capabilities, and enhanced
access to more diverse patient populations, have been combined with flexible delivery approaches and
partnership models – all with the aim of reducing development time and costs.

Flexible partnership models: ICON has partnerships with a majority of world’s top biopharma and biotech
companies worldwide. ICON is a global leader in Functional Service Provision and a top global provider of full
service clinical research.

Differentiated DCT platform, healthcare intelligence & technology: The new ICON can deliver
differentiated decentralized and hybrid trial solutions through a suite of capabilities, including mobile health,
commercial connected health platforms, real world data and information solutions, a global site network, home
health services and wearables expertise.

Access to patients: The new ICON offers customers enhanced access to a larger global pool of more diverse
patients through its global site network (Accellacare), specialized oncology network (Oncacare), a pediatric site
network, in-home clinical services and a network of six Phase I clinical research units across the United States
and Europe.

24
•

•

On September 3, 2020, as part of an internal initiative, ICON announced that it was launching Accellacare, a global
clinical research network offering patients easier and faster access to innovative treatments and offering customers
the option to deploy decentralized trials. The site network includes previously acquired PMG Research in the US
and MeDiNova Research in EMEA;

On July 24, 2020 a subsidiary of the Company, ICON Clinical Research Limited, entered into an agreement to
jointly establish a new company, Oncacare Limited ("Oncacare"), with a third party. Oncacare operates a
specialized oncology site network in the US and EMEA regions. The new site network focuses on implementing a
range of commercial models with specialist oncology healthcare providers in the US and EMEA to accelerate the
recruitment and retention of patients into oncology trials. The oncology site network operates as a joint venture
between the Company and a third party company which has extensive experience in developing and running a site
network. The Company has invested $4.9 million to obtain a 49% interest in the voting share capital of Oncacare.
The third party to the joint venture has the right to sell the 51% majority voting share capital exclusively to the
Company in a two and half year period, commencing January 1, 2023 and ICON also has the right to acquire the
51% majority voting share capital from August 1, 2025 (see note 3 - Investments in the consolidated financial
statements);

On January 22, 2020 a subsidiary of the Company, ICON Investments Limited, acquired 100% of the equity share
capital of MedPass International ("MedPass"). MedPass is the leading European medical device CRO, regulatory
and reimbursement consultancy, that specializes in medical device development and market access. The
acquisition of MedPass further enhances ICON’s Medical Device and Diagnostic Research services, through the
addition of new regulatory and clinical capabilities in Europe. The integration of MedPass’s services brings noted
expertise in complex class 3 medical devices, interventional cardiology and structural heart devices. The total
consideration was $47.6 million;

On September 24, 2019 a subsidiary of the Company, ICON Clinical Research LLC, acquired a 100% interest in
Clinical Research Networks ("CRN"). Founded in 2003 and operating from its headquarters in Illinois, USA and
Gdansk, Poland, CRN is a leading provider of at-home trial services and site support services from study start-up to
closeout for Phase I-IV global studies. CRN will grow ICON's patient recruitment capabilities globally and
complements ICON's site network (now called Accellacare) in the USA, PMG Research and the recently acquired
site network in EMEA, MeDiNova. The consideration to acquire the 100% interest was cash of $35.3 million and
contingent consideration which was initially estimated at a fair value of $2.5 million. During 2020, the contingent
consideration was settled at fair value in the amount of $0.5 million. The change in fair value has been recorded in
the selling, general and administrative expense line of the Consolidated Statement of Operations;

On May 23, 2019 a subsidiary of the Company, ICON Clinical Research (U.K.) Limited, acquired a majority
shareholding in MeDiNova, a site network with research sites in key markets in Europe and Africa. The
consideration to acquire the majority shareholding was cash of $54.1 million (excluding a working capital
adjustment of $0.5 million). The contingent consideration was paid in October 2019. The acquisition further
enhances ICON's patient recruitment capabilities in EMEA and complements ICON's existing site network in the
USA, PMG Research. ICON had the right to acquire the remaining shares in the company and on March 9, 2020
ICON exercised its option to call the outstanding shares in the noncontrolling interest to take 100% ownership of
MeDiNova. Effective from this date, the noncontrolling interest was derecognized and a liability was recognized,
representing the assessment of the redemption value of the noncontrolling interest. This liability was settled on July
17, 2020 for $43.9 million;

On January 25, 2019 a subsidiary of the Company, ICON Laboratory Services, Inc., acquired 100% of the share
capital of MolecularMD Corp. ("MMD"). The consideration was $42.2 million. MMD is a molecular diagnostic
specialty laboratory that enables the development and commercialization of precision medicines in oncology. It is a
recognized leader in the analytical development and clinical validation of molecular diagnostic assays. It offers a
comprehensive test menu in immuno-oncology development and services also include companion diagnostic
development services. The acquisition enhances ICON’s laboratory offering in molecular diagnostic testing and
brings to ICON expanded testing platforms, including next generation sequencing, and immunohistochemistry
(IHC);

B. Business Overview

ICON is a leading global provider of outsourced development and commercialization services to pharmaceutical,

biotechnology, medical device, and government and public health organizations.

We offer a full range of clinical, consulting and commercial services that range from clinical development strategy,

planning and trial design, to full study execution, and post-market commercialization.

ICON provides its services across a range of clinical outsourcing operating models including strategic partnerships,

preferred provider, full-service delivery to functional service provision and stand-alone services.

25We specialize in the strategic development, management and analysis of programs that support all stages of the clinical
development process, from compound selection to Phase I-IV clinical studies. We earn revenue by providing a number of
different services to our customers. Those services are integral components of the clinical development process and include
clinical trial management, consulting, contract staffing, data solutions and laboratory services. Since the completion of the
Merger, the Company also now offers a standalone data solutions service via it's Symphony Health Solutions ("Symphony" or
"Symphony Health") business.

Our vision is to be the healthcare intelligence partner of choice by delivering industry leading solutions and best in class
performance in clinical development. We believe that we are one of a select group of CROs with the expertise and capability to
conduct clinical trials in the major therapeutic areas on a global basis and have the operational flexibility to provide development
services on a stand-alone basis or as part of an integrated full-service solution.

Following the completion of the Merger with PRA on July,1 2021, ICON is now a substantially larger company at
December 31, 2021 compared to previous years. At December 31, 2021, we employed approximately 38,330 employees in 142
locations in 53 countries. During the year ended December 31, 2021, we derived approximately 47.1%, 46.4% and 6.5% of our
revenue in the United States, Europe and Rest of World, respectively (see note 20 - Business Segment and Geographical
Information in the consolidated financial statements).

The ICON Strategy

We have achieved strong growth since our foundation in 1990, as a global provider of outsourced development and
commercialization services to pharmaceutical, biotechnology, medical device and government and public health organizations.
We focus our innovation on those factors that are critical to our clients - reducing time to market, reducing cost and increasing
quality. Our global team has extensive experience in a broad range of therapeutic areas. ICON has been recognized as one of
the world's leading Contract Research Organizations (''CROs") through a number of high-profile industry awards.

As our market has evolved, biopharmaceutical companies are tackling productivity challenges, increasing budget
constraints and greater demands to demonstrate product value; all of which are placing increased pressure on their revenues
and levels of profitability. However, these trends have generally been positive for CROs, as increased outsourcing has been
adopted by these companies as they seek to create greater efficiencies in their development processes, convert previously fixed
costs to variable, and accelerate time to market for new treatments.

One consequence of the drive to accelerate time to market will be increased emphasis on making existing drug
development phases more seamless, through the use of techniques such as adaptive trial designs to filter the most promising
compounds and test these in parallel in several therapeutic indications or with other drug combinations.

Regulatory and reimbursement pressures will increase the emphasis on late stage (post marketing) research, while
increasing requirements to demonstrate the economic value of new treatments. As a result, outcomes and comparative
effectiveness research will most likely be required in order to secure on-going product reimbursement. Furthermore, we believe

26advances in molecular biology and genetics will drive further growth in innovation in the long term which in turn should create
further growth opportunities for both biopharma companies and their outsource development partners.

We expect that continued outsourcing will be a core strategy of clients in the near term as they respond to the increased
pressures on their revenues and profitability. Larger clients were the first to form strategic partnerships with global CROs in an
effort to reduce the number of outsource partners with whom they engage and to reduce inefficiencies in their current drug
development models. More recently we have seen the increasing adoption of this partner model with mid-tier pharmaceutical and
biotechnology firms as they also seek to drive development efficiencies. As outsourcing penetration increases, we believe clients
may seek a greater level of integration of service offerings from CROs, although some will continue to purchase services on a
stand-alone basis. Creating greater connectivity and “seamlessness” between our services and the sharing of “real-time” clinical,
operational and “real world” data with clients will therefore become increasingly important for CROs. ICON will seek to benefit
from this increased outsourcing by clients to grow our business by increasing market share with our existing client base and
adding new clients within the Phase I-IV outsourced development services market; the aim being to ensure we will be considered
for all major Phase I-IV projects.

Delivery of our mission and strategy is focused on our four strategic pillars, being (i) Patient Access & Engagement (ii)
Career Development & Employer of choice (iii) Enduring Customer Partnerships and (iv) Healthcare Intelligence & Applied
Innovation.

Patient Access & Engagement

ICON has a focused patient, site and data strategy, which is helping us to improve site identification, study placement

and patient recruitment and retention.

Accellacare is ICON's global clinical research network offering customers a wide range of stand-alone and integrated
solutions at the site or in patients' homes as part of decentralized trials. Our patient centric approach accelerates study start-up
and increases patient recruitment and retention for pharmaceutical, biotechnology and medical device industries.

The Accellacare Site Network encompasses more than 150 sites across 8 countries and incorporates PMG Research in
the US and MeDiNova Research in EMEA. Accellacare offers a quality focused clinical research infrastructure delivering value
and benefits to sponsors. Accellacare supports customers with faster start-up - site selected to site initiation visit is on average
30% faster and it achieves an average of 40% more patients per site when compared to other sites.

Accellacare In-Home Services takes study visits directly to patients where they live, work, study or play in all phases
and therapeutic areas of clinical trials. By bringing trial visits directly to patients, we ease the burden of participating in clinical
research to increase patient recruitment, retention and diversity. Accellacare In-Home Services has experience in more than 400
clinical trials, tailoring our services to fit each study's specific requirements across more than 55 countries. This cohesive
approach is leading to higher patient recruitment and retention rates. Accellacare is also achieving faster study start-up for its
customers through efficiencies gained in central process management including budget and contracting, which can otherwise be
a source of delay. This combined with a finely tuned feasibility approach allows the network to identify and recruit more patients
to studies, in a wide range of therapeutic areas, in a shorter time frame. Accellacare is an important part of the integrated patient,

27site and data strategy, helping us to improve patient recruitment and retention. Through Accellacare we are committed to
delivering on the promise of patient centricity in clinical research. It is also providing investigators with innovative treatments for
their patients with a quality-focused clinical research infrastructure supported by experienced professionals globally.

In 2021, Accellacare entered new partnerships with six research sites across four countries, expanding its global
footprint and capabilities. Agreements with Asclepes Research and Olympian Clinical Research in the U.S., Curiositas ad Sanum
and Intermed in Germany, Quironsalud in Spain, and KO-MED in Poland. Through these new partnerships, Accellacare is also
enhancing its capability in the central nervous system (CNS) and immune-inflammation therapeutic areas.

The expansion of the Accellacare Site Network increases access and engagement with investigative sites and its
patients, with the goal of faster recruitment and reducing the overall time and cost associated with drug development for
customers. Accellacare now has access to more than 9 million patients.

Finding and engaging suitable patients to conduct clinical trials is one of the biggest issues facing the drug development
industry today. Less than 1% of the US population participates in clinical trials and the performance of investigative sites that do
take part in research is uneven, hard to predict and many trials do not meet the initial recruitment goals. The current market
challenge in patient enrollment creates an opportunity for ICON to differentiate its service offering and we are working to reduce
patient recruitment times through enhanced site and investigator selection based on key performance metrics and through use of
our proprietary Firecrest technology which is used to train and support sites during the development process. Our Accellacare
and Oncacare site network alliances enhances our ability to enroll patients onto the clinical studies we perform. We have also
developed strategic alliances with investigator site groups and healthcare systems in all major global research markets. In
partnership with others we are pioneering patient recruitment solutions that leverage cognitive computing to transform clinical
trial matching and allow a data-driven approach to deliver the right patients for trials. One Search is our intuitive, integrated
workflow and interrogation tool that enables access to multiple data sources and provides the visualization and tools necessary
for optimum site identification based on ICON and industry data of capability, experience and performance. Scoring on
enrollment performance, speed of start-up and quality supports better site selection.

Career Development & Employer of choice

People have long been central to our mission to improve the lives of patients by accelerating the development of our
customers’ drugs and devices through innovative solutions. We encourage our people to bring flexibility, innovation, and
determination to every situation. By doing so, our people can build exciting and rewarding careers, and deliver results to bring
life-changing medicines to market and to maintain our success as an industry leader.

Our leadership and talent programs contribute to the enhanced retention of our employees, better project deliverables

for our customers and the enhanced financial performance of the business.

We aim to be an industry leader: a company where talented people come to do important work, a place where our
employees can shape the future of healthcare, grow their careers, and reach their full potential. We have long held a deep
commitment to cultivating strong people practices. This includes competitive total rewards packages along with a focus on
continuous learning. We nurture a culture of development and aim to boost engagement by supporting our people’s growth, both
personally and professionally. We are dedicated to finding opportunities for our employees to grow and develop.

Our success depends on the knowledge, capabilities, and quality of our people. To improve their skills, we are
committed to providing continuous learning. This commitment is underpinned by clearly defined competencies, which offer
employees a clear path along which to develop skills and advance their careers.

To support employees at every stage of their career journeys, training and development programs are aimed at
advancing scientific, technical, and business knowledge. Programs include tailored CRA academies and a range of project
management curricula, therapeutic-focused programs, and people leader development programs.

Enduring Customer Partnerships

We continue to focus on expanding and deepening our partnerships with existing customers, while also developing new

customer relationships.

Strategic client relationships will increasingly manifest themselves in many different forms. Many of these relationships
will require innovative forms of collaboration across ICON service areas and departments and will therefore require increased
flexibility to offer services on both a standalone functional basis and as part of a fully integrated service solution. To support this
objective, we continue to evolve our collaboration and delivery models, invest in technology that will enable closer data
integration across our service areas and enhance our project and program management capabilities.

To meet the evolving needs of both our existing and new clients we continue to enhance our capabilities through both

organic service development and targeted acquisitions.

28During the year, we continued to enhance our scientific and therapeutic expertise to support our customers in specific
areas including oncology, orphan and rare diseases, CNS, dermatology, infectious disease and women's health. During 2021
and 2020, ICON mobilized its vaccine resources to address the COVID-19 global threat, including its ability to conduct home-
based trials to minimize infection. In addition, the Company is currently providing clinical monitoring and safety oversight on
numerous COVID-19 trials for both the private and government sectors.

ICON mobilized a large global team of therapeutic and operational specialists to partner on the implementation of
Pfizer‘s and BioNTech’s strategic plan and framework for the monitoring of the trial, which included a high level of remote clinical
monitoring and source data verification in addition to on-site monitoring, safeguarding data quality and integrity in the evolving
pandemic environment. The team combined the benefits of full service and functional service provider clinical operating models
to increase efficiency and ensure rapid study start-up.

ICON worked with 153 sites in the US, Europe, South Africa and Latin America to ensure the recruitment of more than
44,000 trial participants over a four month period in late 2020. ICON provided site training, document management and
operational support for patient Informed Consent Form review, coordinated eConsent in most countries, and assisted with clinical
supply management services. Achieving the unprecedented trial timelines, while maintaining high standards of quality,
undertaken in response to the pandemic required collaboration and strong communication between the ICON and companies’
project teams.

We continue to target growth in under-penetrated CRO market segments. Penetration within medical device companies
has lagged that of bio-pharma firms but is beginning to accelerate. EU regulatory reform enacted in 2017 is a further catalyst to
growth in this segment as it included stricter requirements to perform clinical evaluations and post-sale surveillance. In early
2020, the Group acquired MedPass which has further enhanced our value offering in this area.

We also invested significantly in our site and patient network (Accellacare), and consider our expertise and offering in

this area as one of our strategic pillars effective from 2021.

Healthcare Intelligence & Applied Innovation

Innovation at ICON is focused on the factors that are critical to our clients. We develop integrated technologies to
significantly enhance the efficiency and productivity of clients’ drug and device development programs, providing true
transparency across all areas of a study.

ICON is focused on applying innovation that can help our customers improve their development outcomes. We are
focusing this innovation in three critical areas: improving clinical trial design and execution; faster and more predictable patient
recruitment; and evolving clinical trials to be more patient centric which includes data collection and analysis directly from
patient’s digital devices. Our approach to developing solutions to these challenges incorporates partnering with best in class
technology providers but is also supported by a suite of differentiated ICON proprietary technologies.

We have continued to invest in building our capabilities in the gathering, analysis and application of real world patient
data within both the clinical trial and post-trial observational study environments. Alongside expanding internal capabilities, we
continue to develop innovative partnerships with providers of real world data including TriNetX. During 2018, we signed an
agreement with Intel to deploy the Intel® Pharma Analytics Platform for use in clinical trials. The Intel platform is an artificial
intelligence solution that enables remote monitoring and continuous capture of clinical data from study subjects using sensors
and wearable devices and can apply machine learning techniques to objectively measure symptoms and quantify the impact of
new therapies.

Firecrest is ICON’s proprietary comprehensive site performance management system, is a web-based solution which
enables accurate study information, including protocol information, training manuals and case report forms, to be rolled out
quickly and simultaneously to investigative sites. It allows site behavior to be tracked to ensure training is understood,
procedures are being followed and that timelines and study parameters are met. It can significantly reduce the number of data
queries originated from investigator sites. Firecrest is now integrated into the ICON Safety Reporting Solution and provides a
new Site Question Management Tool.

ICON has also developed a patient engagement platform to support improved patient experience & enrollment in clinical
trials. The web based patient engagement platform, provides patients with study specific information and connectivity with the
nearest investigative site. The solution supplements patient recruitment outreach by sites and increases visibility of potential
study participants for sponsors and sites. An easy to navigate, user friendly interface guides the patient to new and ongoing
studies in their particular indication and a pre-qualification questionnaire helps to determine if the study is a right fit for them. If
the patient decides to register interest, they are given the option to select their nearest investigative site. This establishes
connection with the site and the patient can then choose to contact the site or ask to be contacted for pre-screening.

29The completion of the Merger has significantly expanded ICON's data driven strategy with the addition of Symphony
Health. Symphony Health is a trusted partner and leading enabler of integrated health data liquidity and analytics, delivered as a
cloud-based solution.

We positively impact patients’ lives by understanding their journeys and how they can benefit from drugs currently in
development and on the market. We do this by developing a holistic, global data environment across pharmaceutical/ biotech
companies (development to commercial) that gives insights into patients, and how best to serve them.

Alongside the application of these technology solutions we are also focused on innovation through the redesign and

where appropriate the automation of current clinical trial processes.

Operational Excellence, Quality and Delivery

Quality is the foundation of our success. The quality of our work is vital to our mission of bringing better medications to
patients around the world. We are committed to maintaining, supporting, checking and improving our quality systems to meet or
exceed the quality standards demanded by our clients, patients and regulatory authorities. We focus our innovation on the
factors that are critical to our clients – reducing time to market, reducing cost and increasing quality – and our global team of
experts has extensive experience in a broad range of therapeutic areas.

Quality project execution underpins all that we do and we have an ongoing focus on developing our people
and processes to continue to enhance our service delivery. We also deploy supporting technologies which we believe will enable
faster and deeper insights into the quality of trial data.

We are focused on operational excellence across our support functions and we operate a global business support
infrastructure across functions including finance, information technology, facilities, human resources and legal. This enables us to
enhance the service levels across these support areas whilst driving down the costs of the service provision.

Capabilities and Service Offerings

ICON is a global provider of outsourced drug and device development and commercialization services to
pharmaceutical, biotechnology, medical device, government, and public, consumer health organizations. These solutions span
the Clinical Development lifecycle from compound selection to Phase I-IV clinical studies and post approval outcome research
and market access consulting solutions.

30
We offer a broad range of specialized services to assist pharmaceutical, biotechnology and medical device companies

to bring new drugs and devices to market faster. Our services span the entire lifecycle of product development and can be
adapted to suit local trials or large global programs. Specific clinical development services offered to biopharmaceutical and
medical device companies include:

31Industry Overview

The CRO industry provides independent product development solutions and services for the pharmaceutical,
biotechnology and medical device industries. Companies in these industries outsource services to CROs in order to manage the
drug and device development process more efficiently and to bring both patent-protected bio-similars and medical devices to
market faster to enhance patient well-being and maximize their return on investment. The CRO industry has evolved since the
1970s from a small number of companies that provided limited clinical development services to a larger number of CROs that
offer a range of services that encompass the entire research and development process, including pre-clinical development,
clinical trials management, clinical data management, study design, bio statistical analyses, post market surveillance, regulatory
affairs, central laboratory and market access services. CROs are required to provide services in accordance with good clinical
and laboratory practices, as governed by the applicable regulatory authorities.

The CRO industry is highly fragmented, consisting of several hundred small, limited-service providers, medium sized
CROs and a small number of large CROs with global operations. Although there are few barriers to entry for small, specialist
service providers, we believe there are significant barriers to becoming a CRO with global capabilities and expertise. These
barriers include the infrastructure and experience necessary to serve the global demands of clients (sponsors), the ability to
recruit sites and patients globally, the simultaneous management of complex clinical trials, the ability to offer customers a variety
of delivery models, broad therapeutic expertise and the development and maintenance of the complex information technology
systems required to integrate these capabilities. In recent years, the CRO industry has experienced consolidation, resulting in the
emergence of a select group of CROs that have the capital, technical resources, integrated global capabilities, data and
expertise to manage the development programs of pharmaceutical, biotechnology and medical device companies. We believe
that large and medium-sized pharmaceutical companies are selecting a limited number of CRO service providers with which they
deal rather than utilizing many, in order to form strategic partnerships with global CROs in an effort to drive incremental
development efficiencies and leverage the scientific and medical expertise. We believe that this trend will continue to concentrate
the market share among the larger CROs with a track record of quality, speed, flexibility, responsiveness, global capabilities and
access to patients and overall development experience and expertise.

New Drug Development Overview – Ethical Pharmaceuticals and Biologics

Before a new drug or biologic may be marketed, it must undergo extensive testing and regulatory review in order to
determine that it is safe and effective. The following discussion primarily relates to the FDA approval process for such products.
Similar procedures must be followed for product development with other global regulatory agencies. The stages of this
development process are as follows:

Preclinical Research “In vitro” (test tube) and animal studies must be conducted in accordance with applicable
regulations to establish the relative toxicity of the drug over a wide range of doses and to detect any potential to cause birth
defects, affect vital organs, cause mutations or cancer. Many of these tests must be performed before a new investigational
therapy can progress into human studies. If results warrant continuing development of the drug or biologic, the sponsor or owner
of the asset will file for an Investigational New Drug Application, or ("IND"), which must be approved by the FDA before starting
the proposed clinical trials. However, preclinical studies will continue to be conducted in parallel with the clinical trials, some of
which can take up to 3 years to complete. Preclinical research is not commonly provided by ICON as a service to its customers.

Clinical Trials (approximately 3.5 to 7 years)

Exploratory Development

Phase I (approximately 6 months to 1 year) consists of basic safety and tolerability testing in small numbers of human
subjects, initially in healthy volunteers, and includes studies which may show the drug is having an effect on the body, if it is safe,
how it is affected by other drugs, where it goes in the body, how long it remains active and how it is broken down by and
eliminated from the body. After single and multiple dose studies have been conducted, the asset can progress into Phase II,
however, Phase I studies will continue to be done to help support the development of the asset in new populations such as
children or the elderly.

Phase II (approximately 2 to 3 years) includes basic efficacy and dose-range testing in a limited patient population
(usually) 100 to 200 patients to help provide preliminary safety and evidence that the drug is likely to be effective in the target
disease. If the Phase II results are satisfactory the sponsor may decide to proceed to Phase III studies.

Confirmatory Development

Phase III (2 years or greater) consists of efficacy and safety studies in several hundred to a few thousand patients at

multiple investigational sites (hospitals and clinics), often in multiple geographies.

FDA approval, through submission of an IND, is necessary for all clinical trials, regardless of the phase of development.

In addition, parallel independent committee approval is also required.

32NDA or BLA Preparation and Submission. Upon completion of Phase III trials, the sponsor assembles the statistically
analyzed data from all phases of development into a single large submission along with the Chemistry, Manufacturing and
Controls (CMC) and preclinical data and the proposed labeling into the New Drug Application (NDA), or Biologics License
Application (BLA) and submits them for assessment and approval by the relevant division of the FDA.

Expanded Access Programs (EAPs). Sometimes a study drug may continue to be provided to subjects after
completion of a clinical trial, also called compassionate use. EAPs refer to the regulated use of a study drug outside of a clinical
trial by patients with serious or life-threatening conditions where there is no alternative therapy available. In this context the FDA
may allow the sponsor to make the study drug available to a larger number of patients for treatment use.

FDA Review and Approval of NDA or BLA (1 to 1.5 years). Data from all phases of development is scrutinized to
confirm that the applicant company has complied with all applicable regulations and that the benefit to risk ratio for the drug or
biologic is positive for the specific use (or “indication”) under study. The FDA may refuse to accept the NDA or BLA if the
application has administrative or content criteria which do not meet FDA standards. The FDA may also deny approval of the drug
or biologic product if applicable regulatory requirements are not satisfied, if the drug has not adequately shown to be effective or
if there are safety concerns. Often a company will be required to conduct specific studies after the approval of a drug. These are
called post approval commitments.

Post-Market Surveillance, Phase IV Studies and Health Outcomes. Once approved by the FDA, the FDA requires
the drug or biologic license holder to collect and periodically report to the FDA additional safety (and perhaps efficacy) data on
the drug or biologic for as long as the license holder markets it (post-market surveillance, including pharmacovigilance). If the
product is marketed outside the U.S., these reports must include data from all countries in which the drug is sold. Additional
studies (Phase III and Phase IV) may be undertaken after initial approval to find new uses for the drug, to test new dosage
formulations, or to confirm selected non-clinical benefits, e.g., increased cost-effectiveness or improved quality of life.
Additionally, the FDA and other regulatory agencies are requiring license holders of drugs or biologics to prepare risk
management plans which are aimed at assessing areas of product risk and actively managing such risks throughout the product
lifecycle.

Key Trends Affecting the CRO Industry

CROs derive substantially all of their revenue from the research and development expenditures of pharmaceutical,
biotechnology and medical device companies. We believe that the following trends create further growth opportunities for global
CROs, although there is no assurance that growth will materialize.

Continued Innovation and Development of Enabling Technologies

Innovation Driving New Drug Development Activity

New technologies together with improved understanding of disease pathology (driven by scientific advances such as
the mapping of the human genome) have increased the number of new drug candidates being investigated in early development.
This has greatly broadened the number of biological mechanisms being targeted, which increasingly include rare/orphan
diseases that currently have no effective treatments.

These developments should lead to increased activity in both Preclinical and Phase I development and in turn lead to
more treatments in Phase II-III clinical trials. As the number of trials that need to be performed increases and these trials become
focused in indications where finding suitable patients is increasingly challenging, we believe that drug developers will
increasingly rely on CROs to manage these trials to leverage their global expertise and to continue to focus their own
competences on drug discovery and sales and marketing.

Decentralized and hybrid trials

Decentralized and hybrid trials have existed for quite some time but the coronavirus pandemic accelerated the demand
when pharma was challenged to move to remote models to protect patient safety and ensure data integrity for COVID-19 vaccine
trials and other ongoing trials. The pandemic has provided an opportunity to move many technologies and remote patient care
solutions from pilot phase to supporting patients and research.

33
As an industry, we have an opportunity to make decentralized and hybrid the standard moving forward. The ways the
industry have been conducting clinical research in a traditional site-based approach need to flex so we can implement these
tools, techniques and processes in everyday research to bring about a more patient-centric approach. Each new element needs
to be evaluated to assess the impact for the individual patients and study sites. Recent experiences in the industry have shown:

•

Using fewer countries and fewer sites can reduce costs, decrease timelines for start-up and minimize the risk of
disruption during and post pandemic.
Hybrid studies, utilizing digital health, in-home health, and telehealth, can reduce the number and frequency of
onsite patient visits and therefore reduce patient burden.
Home-based patient visits and direct-to-patient contacts can increase patient satisfaction, compliance and
retention, providing greater trial resilience.
Harmonizing data from disparate data sources will provide real-time access and consistent data visibility, helping to
improve safety monitoring and enabling the visualization of data trends.

Regulatory easement has resulted in a number of positive changes to clinical trial procedures, enabling studies to
continue and in some case progress at a faster pace, and improvements to the process of CTA and IND approvals despite the
restrictions imposed by the current COVID-19 pandemic. However, the regulatory authorities have been clear that regulatory
easement will be discontinued once the pandemic recedes so it remains to be seen how many of these improvements will
endure and become standard practice in the longer term. It is hoped that we can hold on to some of the improvements for the
benefit of the patient and healthcare advancement.

At the end of the day, we are trying to increase the speed at which drugs can meet approval guidelines and help
treatable populations. By using decentralized tools, technologies and processes, we will reduce the burden on patients, increase
satisfaction and provide them with the same standard of care during a virtual or home visit that they would receive in a clinic and
fulfilling the promise of clinical research as a care option. While reduced costs may not be seen in the early phase of adoption (in
fact investment may be required initially) choosing the right solution for the specific study characteristics has the potential to
increase patient recruitment and retention which can result in reduced overall research costs and quicker time to market. To find
the best clinical trial design to suit their needs, sponsors will need to take patient centricity into consideration from the outset and
at every step along the way. Because what benefits the patient will ultimately benefit the sponsor in outcomes.

New Technology Enabling More Efficient Development

Technology innovation is playing an increasingly important role in helping to support more efficient drug development.
Leveraging differentiated technology solutions and data collaborations drives better execution in clinical trials. The larger CROs
have been at the forefront of this innovation developing technology solutions that support the integration of trial data across
multiple systems, data repositories that enable sponsors to get real time clinical insights on their drugs performance and tools
that support better trial designs and operation. See further details on our new technologies and innovations in the section on
information systems on page 46.

The emergence of modern healthcare technologies ("mHealth") that build on the global prevalence of mobile and digital
technologies also have an influence on drug development. It is now possible to capture health data using mobile devices and
wearables. This enables sponsors to gather new clinical and “real-world” patient insights and will also be used to enhance patient
engagement and adherence throughout the development process. As these devices mature it will also be possible to complete
more “virtual trials” based on remote monitoring of patients in their home environment which may drive further efficiencies in the
trial process.

Social media is also becoming an important platform for life sciences companies to strengthen patient engagement
programs and collaborate with other stakeholders in the healthcare system. Many sufferers of specific diseases are forming
patient groups and actively collaborating using social media. These groups represent an important potential source of patients for
new clinical studies but can also provide valuable insights into effectiveness and safety of new treatments.

As the influence of technology on drug development grows, it broadens the potential number of partners that CROs will

work with in the future.

Expanded Use of New Patient Data Sources

Pharmaceutical companies are looking to access a variety of new healthcare data sources containing medical and
prescribing records to help improve development programs and to get better evidence of the value their treatments are bringing
to patients once they are launched in the market. The larger global CROs have significant data management experience which
can be leveraged to support these efforts and have invested in analytics capabilities to help deliver better insights for customers
during the product lifecycle. Global CROs are also forging collaborations to access specific data sets that can provide further
patient insights to support better matching of patients to the clinical trial process.

34Improving Productivity and Operating Efficiencies

Continuing Focus on Productivity within Research and Development Programs

Pharmaceutical and biotechnology companies continue to seek ways to improve the productivity of their development
efforts and increasingly see the use of CROs as a strategic component of these efforts. They are leveraging the expertise with
CROs to help identify the most promising drug candidates in early development and discontinue developing those that have
safety issues, limited efficacy or that will have significant reimbursement challenges. These companies are also initiating
programs to drive more efficiency in their development programs. One example of this has been the efforts to achieve a more
seamless transition across development phases, particularly Phase I-III. In parallel, regulatory initiatives such as the 21st Century
Cures Act and the emergence of clinical trial techniques such as adaptive trial design, risk based clinical trial monitoring,
decentralized and hybrid trials are enhancing development, allowing effective treatments to get to patients quicker at reduced
development costs.

Cost Containment Pressures

Over the past several years, drug companies have sought more efficient ways of conducting business due to margin
pressures stemming from patent expirations, greater acceptance of generic drugs, pricing pressures caused by the impact of
managed care, purchasing alliances and regulatory consideration of the economic benefit of new drugs. Consequently, drug
companies are centralizing research and development, streamlining their internal structures and outsourcing certain functions to
CROs, thereby converting previously fixed costs to variable costs. Larger companies (and more recently medium sized
companies) are actively entering strategic partnerships with a limited number of CROs in an effort to drive increased efficiencies.
The CRO industry and in particular large CROs with global capabilities, considerable scientific knowledge and expertise are often
able to perform the needed services with greater focus and at a lower cost than the client could perform internally, although CRO
companies themselves are facing increased cost containment pressures as drug companies seek to further reduce their cost
base.

Global trends influencing the CRO industry

Pressure to Accelerate Time to Markets and Globalization of the Marketplace

Reducing product development time maximizes the client’s potential period of patent exclusivity, which in turn
maximizes potential economic returns. We believe that clients are increasingly using CROs that have the appropriate expertise
and innovation to improve the speed of product development to assist them in improving economic returns. In addition, applying
for regulatory approval in multiple markets and for multiple indications simultaneously, rather than sequentially, reduces product
development time and thereby maximizes economic returns. We believe that CROs with global capabilities, considerable
knowledge and experience in a broad range of therapeutic areas are key resources to support a global regulatory approval
strategy. Alongside this, the increasing need to access pools of new patients is leading to the conduct of clinical trials in new
“emerging regions” such as Eastern Europe, Latin America, Asia-Pacific and South America. We believe that having access to
both traditional and emerging clinical research markets gives global CROs a competitive advantage.

Growth within the Biotechnology Sector

The nature of the drugs being developed is continuing to change. Biotechnology is enabling the development of
targeted drugs with diagnostic tests to determine whether a drug will be effective given a patient’s genomic profile. An increasing
proportion of research and development expenditure is being spent on the development of highly technical drugs to treat very
specific therapeutic areas in areas of unmet medical need. Much of this discovery expertise is found in biotechnology firms. We
believe that it is to these organizations that the large pharmaceutical companies will look for an increasing proportion of their new
drug pipelines. Whether it is through licensing agreements, joint ventures or equity investment, we believe we may see the
emergence of more strategic relationships between small discovery firms and the larger pharmaceutical groups. As the majority
of these biotechnology companies do not have a clinical development infrastructure, we believe that the services offered by
CROs will continue to be in demand from such companies providing they have the necessary funding.

Increasing Number of Large Long-Term Studies and an Increasing Requirement to Show the Economic Value of New
Treatments

We believe that to establish competitive claims and demonstrate product value, to obtain reimbursement authorization
from bodies such as the National Institute for Health and Clinical Excellence in the UK, and to encourage drug prescription by
physicians in some large and competitive categories, more clients need to conduct outcome studies to demonstrate, for example,
that mortality rates are reduced by certain drugs. To verify such outcomes, very large patient numbers are required and they
must be monitored over long time periods. We believe that as these types of studies increase there will be a commensurate
increase in demand for the services of CROs who have the ability to quickly assemble large patient populations, globally if
necessary, and manage this complex process throughout its duration.

35The rising costs of healthcare in most developed countries also means there is an increasing pressure to show that new
medical treatments are more cost effective and deliver better patient outcomes than existing treatment regimes. This also means
that sponsors need to increasingly generate outcomes data both as part of the product approval submissions and as part of post-
approval research programs. This is creating opportunities for CROs who can offer support in developing and interpreting this
data.

A Focus on Long-term Product Safety

The clinical trial approval process can only detect major and common adverse side effects of drugs; less common but
no less serious side effects may only become apparent after many years of use. As a result, there is an increase in the number
of drugs given “conditional approvals” where further ‘post-approval’ studies are being mandated. In addition, prudent sponsors
undertake similar studies to detect early warning signs of any potential problems with their products. Such studies may take the
form of prospective long-term safety studies, simpler observational studies or registries where patients meeting specific criteria
for disease or drug use are followed for long periods to detect any safety issues. CROs are well positioned to perform these
studies on behalf of sponsors.

Increasing Regulatory Demands

Regulatory agencies are requiring more data to support new drug approvals and are seeking more evidence that new
drugs are safer and more effective than existing products. As a result, the complexity of clinical trials, the number of procedures
required to be conducted in these trials and the size of regulatory submissions are driving the demand for services provided by
CROs.

Environmental, Social and Governance ('ESG')

Our mission is to improve the lives of patients by accelerating the development of our customers’ drugs and devices
through innovative solutions. We help our customers deliver life-changing medicines by being innovative in our solutions,
collaborative in how we work as teams, accountable for the results we achieve and committed to doing the right thing for our
customers and the patients they serve. We are advancing clinical research while offering customers broader and deeper
experience, scale, and focus, complemented by continuity of delivery and speed to market. Our business model is described in
the sections preceding this. The completion of our Acquisition of PRA Health Sciences in July 2021 marked the birth of the new
ICON and the start of work to unify two global leaders in healthcare intelligence and clinical research. The new ICON remains
committed to responsible and sustainable business practices. We believe that business should not only operate in compliance
with applicable laws, rules, and regulations, but that our behaviors should also address underlying societal concerns.

Our core values underpin our mission and drive a culture and mind-set of ownership at ICON. "Own It @ ICON" is a
statement of values that has remained at the very heart of ICON’s culture, encouraging our people to seize the opportunity and
bring flexibility, innovation, and determination to every situation. We believe our culture of ownership personifies who we are as a
company — it also helps us apply our expertise, collaborate to get things done, and succeed at our mission. ICON is redefining
the company values to take the best of both ICON and PRA values. The Board approved the new values in December 2021 with
a roll out plan during 2022.

The ICON values during 2021 were:

•
•
•
•

Accountability & delivery: We take pride in what we do.
Collaboration: We are one team.
Partnership: We partner with our customers.
Integrity: We do the right thing.

The refined ICON values being rolled out in 2022 are:

•
•
•
•

Integrity: We always do the right thing.
Collaboration: We are better together working as one team.
Agility: We are passionate about providing innovative solutions for customers.
Inclusion: We value diversity and care about the success of our people.

36Our values underpin how we work together to deliver on our mission to improve the lives of patients by accelerating the
development of our customers’ drugs and devices through innovative solutions. These values and our Code of Ethical Conduct,
which underpins these values, form the core of what we do and how we do it. It applies to all officers, directors, employees,
consultants and agents globally. All employees and temporary workers are mandated to complete global ethics training.

ICON established an Environmental, Social, and Governance Committee ('ESG Committee') in 2019, which brought
together all of our existing initiatives and efforts under one umbrella to ensure consistency, enhance monitoring, reveal areas for
development and facilitate reporting to the Board. The ESG Committee is chaired by the Chief Administrative Officer and General
Counsel (CAO), who is responsible for reporting to the ICON executive leadership team and Board on ESG matters. In February
2022, the Board delegated oversight responsibilities of the Company's strategies, activities and risks in respect to ESG matters
to the Nominating and Governance Committee. Accordingly, the CAO will report to the Nominating and Governance Committee
on ESG matters going forward whilst also providing periodic updates to the executive leadership team.

The ESG Committee is focused on developing our strategy and initiatives relating to the environment, social matters,
health and safety, community engagement, corporate governance, sustainability and other public policy matters relevant to the
Company. The ESG Committee is a cross-functional management committee of the Company including representation from
facilities, corporate communications, finance, legal, investor relations, procurement, enterprise risk and resilience, commercial,
marketing and human resources departments. The composition of the ESG Committee was revised following the Acquisition of
PRA to include representatives that have joined from PRA. The Committee assists and supports executive management and the
Board of the Company in:

•
•
•

determining and setting the strategy relating to ESG matters;
developing, implementing and monitoring initiatives and policies based on that strategy; and
communicating our strategies and initiatives and their results.

We are committed to building and developing our ESG strategies and reporting. In 2020 we published our first annual
ESG Report covering 2019 and in 2021 we published our ESG Report covering 2020, which provided an overview of both ICON
and PRA's actions and results during 2020. It also summarizes our current policies, priorities and commitments in respect to
ESG matters. We also launched our ESG page in 2020 on the ICON website and have an internal ESG page on our MyICON
portal to engage with our employees and provide information and updates relating to ESG matters and our commitment to
sustainability. The ESG page is available at https://www.iconplc.com/about/esg/.

The global landscape in respect to regulatory and legislative requirements relating to ESG reporting and disclosure
requirements is rapidly evolving and we are monitoring potential requirements so that we are in a position to adhere to any
additional requirements in due course.

37In 2021, as a testament to our commitment to managing ICON responsibly and sustainably, we became a participant in

the United Nations Global Compact (UNGC), a set of Ten Principles covering the areas of human rights, labor, environment,
and anti-corruption.

Building a sustainable future – our commitment to the United Nations Sustainable Development Goals

As a global company, we maintain an ethical and sustainable presence in hundreds of locations worldwide. At its core,
ICON’s mission is to improve health and lives. We are also committed to contributing to the 2030 United Nations Sustainable
Development Goals (SDGs), and are proud that our work contributes to their advancement.

Our research, our work with customers and patients and our on-the-ground efforts to meet the diverse needs across our
communities align with the SDGs. These efforts, however, focus on a subset of themes where we have the greatest opportunity
to effect change and further details are set out in our ESG Report.

Environmental Management

ICON is committed to delivering excellence in care to our communities. To improve our overall sustainability, this
commitment means tracking and improving our environmental performance across all business activities. We achieve this by
pursuing sustainability strategies that recognize the impact of our operations as a CRO on the environment, addressing
greenhouse gas (GHG) emissions, energy use, waste generation and procurement-related activities. Our employees, directors,
officers, contractors, and temporary workers are expected to support our sustainability objectives.

ICON Green is our program for managing environmental sustainability initiatives, in accordance with our Global
Environmental Management Policy and Environmental Management Plan. The implementation of the ICON Green program is led
by our facilities team, reporting to our Chief Administrative Officer and General Counsel (CAO). The CAO is responsible for
reporting on the program to the ICON executive leadership team and Nominating and Governance Committee and the Board.

ICON set environmental goals around the use of renewable energy and carbon emissions in 2019 and we are working

towards achieving these goals which are as follows:

•
•
•

100% renewable electricity by 2025
20% reduction in kilowatt hours (kWh) of electricity by 2030
Net zero carbon emissions on Scope 1 & 2 by 2030

We have programs in place to manage and minimize climate impacts of business activities. To continue to improve
processes and reduce our environmental impact, we track, calculate, and report our GHG footprint. We follow the GHG Protocol
Corporate Standard, which is the global corporate accounting and reporting standard for calculating carbon emissions. We work
with Carbon Trust to verify emissions data.

In line with carbon reduction targets, ICON’s Scope 1 and 2 GHG emissions, relative to revenue and the number of
employees, have fallen year on year since 2016. Since 2020, following the pandemic-related closure of many of our facilities and
a reduction in business travel, GHG emissions across our operations declined significantly. As the recovery continues, and as we
resume more normal operations we will reflect on opportunities to continue to reduce our carbon emissions across our combined
organization to develop and improve our environmental program.

CDP (formerly the Carbon Disclosure Project) provides a globally recognized system that enables companies to
measure and manage their environmental impacts. ICON continues to be committed to improving its current scoring of a C.
Legacy PRA’s CDP improved from a D score to a C from 2019.

We are focused on reducing energy use across our global operations. For example, reducing energy use and shifting to
renewable energy are components of our specific environmental goals. Waste reduction is embedded into our environmental
policies and practices and is one of the objectives of ICON’s Environmental Management Policy. As we continue to combine the
ICON and legacy PRA organizations, we will seek new opportunities to reduce waste by increasing recycling volumes, reducing
consumption of primary materials, and decreasing use of disposable products in our offices and facilities.

The majority of our sites are leased and we work closely with our landlords and leasing agents to implement measures
to ensure we operate in an environmentally sustainable manner. The Acquisition of PRA has expanded our global real estate
footprint and our real estate group is working with other business leaders to understand the sustainability implications and
opportunities of this new footprint, and find ways to continue to advance our collective sustainability goals. During 2021, we
initiated a project to integrate offices and reduce our footprint. When selecting new locations for offices and planning building
modifications, experts from our real estate team factor in environmental considerations. In addition, we have implemented a
series of measures globally to reduce the local footprint of our offices, such as installing energy-efficient LED lighting, using
motion detectors to reduce energy use, purchasing recycled office supplies, and reducing paper consumption by promoting
paperless office processes, or where printing is necessary, enabling double-sided output.

38Our office design has efficiency in mind, utilizing space to provide the maximum number of desks and functional

provisions while still providing comfortable, safe spaces for our employees. Our strategies include:

•
•
•
•

Perimeter glazing of meeting rooms, offices, and other spaces which allow in natural light.
Recycling areas built into business centers and kitchen/ canteens which reduce waste sent to landfills.
Planted green spaces which contribute to internal air quality, temperature, and humidity.
Building materials and vendors which we select for low environmental impact.

We also require our suppliers to abide by our Global Supplier Code of Conduct which includes a commitment to comply
with applicable environmental laws and regulations, our expectations around waste management and sustainable use of
resources.

Community Engagement

We are committed to making a positive impact on the communities in which we work and live and we have aligned our
community efforts to a broader vision for social impact, including by aligning priorities with our organizational goals of diversity,
inclusion, and belonging.

Our community engagement activities are focused on two core areas:

•
•

supporting education & building closer ties between industry & academia; and
improving the welfare of people in the communities in which we live.

Supporting education and building closer ties between industry and academia

A core area of community support includes building ties between industry and academia to inspire the next generation

of leaders in business and science.

•

Benefactor through the Centuries of Trinity College Dublin. ICON has been honored by Trinity College Dublin as a
Benefactor Through the Centuries. This award recognizes our enduring support for Trinity, including:

◦

The creation of the ICON-McKeon Research Fellowship in Motor Neuron Disease ('MND') in honor of Mr.
Declan McKeon, former Board member, acting Chairman, Lead Independent Director and Chair of the ICON
Audit committee. The ICON-McKeon Research Fellow in MND will carry out research in the areas of machine-
learning and artificial intelligence to derive insights from multimodal clinical, imaging neuro-electric signaling, in
the context of the neurodegenerative disease of ALS.
Partnership with Trinity Centre for People with Intellectual Disabilities ('TCPID') - In 2019, we entered into a
partnership with the TCPID. The TCPID situated within the School of Education, Trinity College Dublin, aims to
promote the inclusion of people with intellectual disabilities in education and society. The Centre provides
people who have intellectual disabilities with the opportunity to participate in a higher education program
designed to enhance their capacity to fully participate in society as independent adults. The 2-year education
program includes work placements and internships to enable students to experience and participate in the
work environment.

•

Partnership with Junior Achievement to inspire schoolchildren. ICON supports our people who take time out of
their working day to deliver Junior Achievement educational programs. Junior Achievement encourages young people to
remain in education and teaches them the skills they need to succeed in a changing world. Our volunteers teach
primary and secondary level students valuable business, STEM and entrepreneurship skills that will stand them in good
stead as they progress through education and beyond.

The PRA Veteran Leadership Training Program (VLTP), The VLTP has been recruiting United States military
veterans from all branches to join the Company in an operational capacity since 2016. Veterans are placed in roles
across the organization to help translate leadership skills learned during military service and apply them in civilian life
and as members of the PRA team. Members of the VLTP also have hands-on learning and mentoring opportunities that
will help ease the transition to corporate life and that connect them with team-based support system.

39Improving the welfare of people in the communities in which we live

Through volunteering, donations and other charitable initiatives, our employees across the world are making a positive
difference to their communities. We support causes that are important to our employees and have a number of programs that
support the welfare of people in our local communities.

In July 2021, ICON contributed $0.2 million to support the purchase of 38,000 COVID-19 vaccines through the UNICEF
COVID-19 vaccination program, one to represent each employee in the new ICON - and became a founding member of
UNICEF’s Corporate Vaccine Alliance in Ireland. The alliance supported UNICEF’s ambitious goal to deliver over two billion
COVID-19 vaccines by the end of 2021.

Since 2012, ICON’s annual employee-nominated charity donation program has supported over 70 charities. These
organizations focus on a range of critical issues, from relieving poverty and homelessness, to improving child welfare through
education, to enhancing the lives of patients who are living with a variety of diseases, including cancer, blindness, Alzheimer’s
disease, autism, and neuromuscular diseases. Usually, ICON donates $10,000 to each of 10 charities around the world, selected
from a list of staff nominations. In 2021, in lieu of formal holiday events, we expanded our program and donated $10,000 each to
20 organizations around the world, instead of our normal practice of supporting 10 charities. The organizations were chosen to
align with our ESG goals.

Under the PRA Cares initiative, PRA employees from around the world have supported community charity programs.
For more than five years, from donation drives to programming community events, PRA people have donated time, money, and
support to inspire kindness and empower action.

Talent and People

At the core of our strategy is our people. Within ICON we have highly qualified and experienced teams, the majority of
whom have third level educational qualifications. The need to develop and retain this expertise and talent within the organization
is fundamental in enabling us to be the global CRO partner of choice for our customers.

At the core of our strategy is our people

The training and development of our staff is a key focus for us

Our leadership and talent programs contribute to the enhanced retention of our employees, better project deliverables

for our customers and the enhanced financial performance of the business.

Our People Leader development program focuses on providing our People Leaders with the relevant skills to effectively
manage themselves, their team and their business, including psychometrics to raise their awareness of their behavioral
preferences and the preference of others. ICON also invested in Harvard Manage Mentor, an online learning platform, providing
People Leaders with access to learning that can be accessed at any time with topics ranging from Change Management,
Diversity & Inclusion, Retaining Employees and Developing Employees.

We provide our people with a personalized and flexible learning experience, delivered through a combination of in-
person and technology-driven programs that suit their learning styles and can flex to suit their schedules. Through our industry
leading CareerHub, ICON employees are encouraged to broaden their scientific, technical, leadership, and business knowledge.
By tapping into development programs and partnerships with leading academic institutions, team members can use the hub to
develop competencies that advance their careers. We also collaborate with University College Dublin to deliver customized
leadership development programs for global employees.

40During 2021, the PRA Academy was maintained for legacy PRA employees, which served as an umbrella for various
training programs, including the Clinical Research Associate (CRA) Bridge Program, Specialty Bridge, Oncology University, and
the CRA Internship Program. Additionally, in 2020, two development programs — PD STRIDES, which focused on Project
Managers in Product Delivery, and Leadership Essentials and Development (LEAD), a comprehensive training program for all
PRA Functional Managers — moved from the pilot phase to full implementation. In addition to formal training, PRA also launched
LinkedIn Learning globally, which provided unlimited access to more than 16,000 expert-led courses and video tutorials covering
professional skills, business software and tools, project management, information technology, creative topics, and much more.

As an organization we are keen to hear directly from our employees

We recognize that, to attract and retain the best talent, it is essential that we listen to and respond to our people’s needs
and we actively seek to understand our employees’ perspectives and amplify their voices. This begins with a focus on diversity,
inclusion and belonging, and extends to every aspect of our work, from recruitment and onboarding, to training, engagement,
enablement, and reward.

We pursue best-in-class approaches to building employee engagement and these include, among others:

Comprehensive global employee surveys, which measure how people feel about their work and whether they feel they
have the tools to do their jobs well. Feedback from these studies informs detailed action plans at the group, function,
and team level.

Pulse check surveys, which are smaller-scale studies designed to measure employee sentiment on specific topics and
initiatives.

Stay interviews to help managers understand why staff stay and to uncover what might put them at risk to depart.

Skip-level meetings to develop trust and rapport between senior leaders and employees.

•

Our listening strategy also informs our efforts to reduce turnover, which we monitor closely through analytics. Qualitative
information is collected through formal exit interviews and, where we believe they’ll make an impact, we intervene via retention
plans and related efforts.

Employee well-being

At the heart of our well-being ethos is a commitment to support our employees’ ability to lead happy, healthy lives. We
aim to ensure that all employees worldwide have equal and direct access to locally relevant information and resources to support
them and their families across a broad range of needs. These include, but aren’t limited to, the physical, social, psychological,
and environmental dimensions of well-being. Our Global Employee Assistance Program ensures that all employees, and their
families, have access to a range of different resources and experts to help them better manage their working life and personal
life.

Health and safety

The welfare and safety of our employees, customers, and clinical trial patients remains our highest priority. We take
guidance from global and regional health authorities and governments to protect the safety and welfare of employees, as well as
abide by government directives. Our priority objectives are the safety of our staff, clinical trial patients, protecting the
environment, maintaining business continuity, and ensuring ongoing protection of our data.

We are committed to providing a safe working environment for our people. We achieve this goal by working in ways that
protect the safety, health, and welfare of all our employees, clinical trial patients, and visitors. We work to identify, mitigate, and
monitor existing and emerging health or environmental risks that may be associated with our business activities.

In response to the pandemic, both PRA and ICON deployed a range of measures to protect employee safety, to ensure
the continuity of customers’ research programs, and to protect patient welfare. These were, and remain, our top priorities for all
decisions we make relating to COVID-19. With pandemic conditions changing around the world during 2020 and 2021, the
Company's COVID Pandemic Task Force worked through the Business Continuity (BC) office, Site Head network, and with other
critical stakeholders to communicate and reopen offices as conditions permitted in accordance with recommendations from the
CDC, WHO, and local governments.

41Fostering diversity, inclusion and belonging

Diversity, inclusion and belonging are fundamental to our culture and values. Our rich diversity makes us more
innovative and more creative, which helps us better serve our patients, our customers and our communities. We recognize the
critical importance of diversity in clinical trials and also affirm that diversity of thought in an inclusive workplace is vital to
innovative ideas, spur more fruitful collaboration and nurture a vibrant culture. We are committed to being a workplace where all
employees feel included with a deep sense of belonging. To achieve this, we acknowledge and celebrate our differences in
gender, ethnicity, culture and abilities. As a values-driven organization, respect for diverse points is foundational to how we
interact with each other, as well as with customers, patients, and suppliers.

We established a Diversity, Inclusion & Belonging Steering Committee in 2019 which was updated in 2021, following the
Acquisition, to comprise of leaders from both the legacy ICON and PRA organizations to guide us in our journey to become a
more inclusive workplace where all employees feel they can be themselves and deliver their best work. We believe in a
workplace culture that embraces diverse perspectives and empowers our team members to grow — at work, at home and in their
communities. The key areas of focus for our diversity, inclusion, and belonging agenda include talent management, country-level
inclusion policies, rewards, training, and communications.

The new ICON brings together two diverse organizations, made great by the talented and ambitious people whose
varied skills, perspectives, and backgrounds will continue to be vital to our success. As a global operation, we deliberately
structure teams to be international, so that we can support the delivery of our customers’ clinical development programs across
multiple geographies.

ICON has Diversity, Inclusion & Belonging advocates from the global employee population to better understand local
needs, build local presence and awareness, and to give a voice to every corner of the world. These Diversity, Inclusion &
Belonging Advocates play a key role in supporting the Diversity, Inclusion & Belonging Steering Committee, aligning activities
across the organization which led to the creation of community groups which are broadly aligned with groups that were already in
place in PRA:

•

NOW@ICON: Networking Organization for Women at ICON is committed to inspiring and connecting current and
potential leaders through an inclusive environment of targeted initiatives and supportive mentorship.

SPACE: Supporting Parents and Carers Everywhere to create a workplace where stepping out of careers due to
personal commitments for a period is wholly accepted and not career limiting, and where stepping back into their career
is an organic and positive process.

PRIDE: Supporting LGBTQ+ colleagues and allies, ensuring that no matter where employees are in the world, our
offices are a safe space where they are welcomed, respected, and valued.

DAWN: The Disability Awareness Network is a community group striving to develop and foster a mindset towards
creating an inclusive workplace and working environment where everyone is treated equally with respect and dignity,
irrespective of any visible or hidden disabilities.

EmbRACE: Supporting all race and ethnic backgrounds in creating an inclusive workplace culture.

ICON is focused on building an inclusive culture where employees feel supported by a fair system supporting pay
equity. We have a long track record of developing talent and filling vacancies through internal hires. Using best-in-class analysis,
we conduct regular reviews of salary ranges to ensure fair pay, irrespective of gender, race, or ethnicity.

We monitor and seek to maintain pay equity for our employees and, as such, strive to structure our pay principles to
ensure that individual differences are not a factor in how we deliver rewards. We have made significant investments in
organization design structures, tools, and communications which underpin our pay principles. This information is hosted through
core technology, giving managers direct access to resources to support and inform pay-related decisions.

As we are integrating the ICON and PRA legacy organizations, we are performing reviews to identify and close any pay
equity gaps and we will continue to expand pay equity analytics and provide actionable guidance to leaders and managers. To
support enterprise planning, we will continue to track company-wide metrics and report on progress to the Board.

We are also committed to ensuring fair employment practices. For every jurisdiction in which we operate, we act in
compliance with relevant laws relating to labor rights and labor relations as well as market competitive benefits. We believe in fair
and equal treatment for all our people, without regard to gender, race, ethnicity, sexual orientation, marital status, physical or
mental disability, age, pregnancy, veteran status, nationality, religion, or any other legally-protected status. We do not tolerate our
employees being subjected to physical, sexual, racial, psychological, verbal, or any other form of harassment. We encourage our
employees to report any issues of harassment or discrimination. We prohibit retaliation against any employee who rejects,
protests, or complains about unlawful discrimination or harassment.

42Human rights

ICON is committed to human rights and the adoption and pursuit of compliance with the United Nations Guiding
Principles on Human Rights and we maintain policies and practices to uphold human rights globally and within our communities
around the world. Our business model and our policies, including our Global Code of Ethical Conduct and Global Supplier Code
of Conduct, are intended to fully comply with applicable human rights legislation in the countries where we operate. Indeed, our
zero-tolerance policy on forced labor, slavery, and human trafficking is defined clearly in these policies, which are available to
employees, suppliers, customers, and the public.

We are completely opposed to forced labor, slavery, and human trafficking. We will not knowingly support or conduct
business with any organization involved in such activities. We do not employ anyone below the minimum employment age in the
jurisdictions in which we operate.

Our Global Supplier Code of Conduct incorporates the Pharmaceutical Supply Chain Initiative (PSCI) principles for
Responsible Supply Chain Management, including for labor. Before doing business with any supplier, we require suppliers to
certify that they will comply with the ICON Global Supplier Code of Conduct or to their own materially equivalent internal code,
which includes human rights. We perform pre-engagement due diligence on all of our suppliers, including in relation to labor
issues, which we support through periodic re-screening. We hold our suppliers accountable for meeting their contractual
obligations. Contract non-compliance can result in termination of the business relationship with the supplier and exclusion from
future business.

Ethics and Compliance

ICON's core values (as detailed on page 36) are infused in everything we do. Meeting these values requires us all to
work to the highest ethical standards and demonstrate a commitment to honesty, transparency and quality. Our focus on acting
ethically is reflected in our policies and codes of conduct, including our Global Code of Ethical Conduct. This Code addresses the
core values expected of our people in our internal interactions with each other as well as in external dealings with patients,
customers, healthcare professionals, regulators, investors, vendors and other third parties.

Our Ethics and Compliance Program is foundational to our culture and will continue to define expectations and guide
behavior across ICON. The Legal Compliance and Ethics Team has oversight of day-to-day management of the program. The
team is independent of the business and reports to the Chief Administrative Officer and General Counsel (CAO). The CAO is
responsible to report on the program to our executive leadership team and the Board. The program supports all functional areas
globally and is dedicated to the implementation of standardized global policies, procedures, training, guidance, communications,
monitoring, investigations, issue management, assessing compliance-related risk and mitigations, and reporting to ensure the
overall compliance program is effectively functioning.

ICON has incorporated a third-party system for employees and third parties to report ethics and compliance questions,
as well as concerns, and to track reports through follow-up and resolution. These tools also provide visibility into our risks while
highlighting opportunities to address them. ICON’s combined compliance and ethics programs will continue to grow and evolve in
response to changes in our business and in the global business climate.

All employees are required to complete mandatory training in key areas which support our values and our ways of
working. The training incorporates the key principles of our policies and codes and includes interactive scenarios where
applicable.

During 2021 we introduced the Speak Up Policy, ICON’s open door policy which replaces the former Ethics Line
Charter. The Speak Up Policy promotes a culture that encourages compliance, openness, and accountability without retaliation.
The Speak Up Policy aims to support our culture and values and seeks to encourage the prompt reporting or surfacing of
concerns or violations. Reported ethics concerns and other ethics and compliance-related data are reported to the Board as
appropriate.

Anti-bribery and Corruption

ICON is guided by the foundational principle that we do not tolerate bribery or any other form of corruption or fraud. Our
anti-bribery/ anti-corruption (ABAC) program is a key element of our Ethics and Compliance Program. ICON and all ICON
directors, employees, consultants, agents and all third parties acting on ICON's behalf must act in compliance with international
laws and regulations relating to bribery, corruption, and illicit payments, including the US Foreign Corrupt Practices Act and the
UK Bribery Act 2010.

ICON has the ISO 37001:2016 certification for its Anti-Bribery Management System having established, implemented,
maintained, reviewed and improved an Anti-Bribery Management System that can prevent, detect and mitigate the risk of bribery.
Our program is designed to ensure our compliance with anti-corruption laws, including due diligence, training, policies,
procedures, and internal controls.

43Bribery and corruption remains a business risk as we conduct our business across the globe and enter into partnerships
and collaborations. There is no certainty that all employees and third party business partners (including our vendors, suppliers,
agents, contractors, and other partners) will comply with anti-bribery laws. When working with third parties, we are committed to
working with only those who embrace high standards of ethical behavior consistent with our own. Bribery and corruption risks are
a focus of our third-party diligence and management process. We hold our suppliers accountable for meeting their contractual
obligations with ICON, including commitments that are made with regard to our Global Supplier Code of Conduct and regulatory
compliance. Contract non-compliance can result in termination of the business relationship with the supplier and exclusion from
future business with ICON.

ICON's internal audit teams conduct ABAC Program audits. Internal Audit focuses on testing for compliance and design
effectiveness of the overall ABAC Program. Internal Audit incorporates an assessment of ABAC measures in all audits, as
appropriate. In this approach, bribery and corruption risks are incorporated into the risk assessment and scoping process of each
audit.

Information Security and Privacy

We understand that data privacy and information security are fundamental to business and key to retaining customers,
building investor trust, protecting patients, and complying with global and regional regulations. We recognize and respect that our
customers, employees, patients, and all those who do business with us expect that we will protect their personal information in
accordance with our legal obligations and the promises we make. Our cybersecurity strategy and program protect our systems
and data against changing threats. The cybersecurity program has the support of executive leadership and the Board, and we
have invested heavily in cybersecurity technologies to protect our environment. Our cybersecurity program is independently
assessed on a regular basis. We have embedded security in our processes to maintain the security of our data and our
customers’ data. We understand that cyber threats move at machine speed and accordingly we have invested in cybersecurity
automation to detect and respond to vulnerabilities and threats rapidly.

Our processes and range of information security policies are certified to ISO27001 and are independently audited twice
annually. We also have the Cyber Essentials certification. During an acquisition process, we conduct security and privacy due
diligence and risk assessments, implement policies, deliver employee training, and securely integrate IT systems.

Our Global Data Protection Policy regulates the processing of personal data in accordance with the applicable data
protection laws of the countries where we operate, including Europe’s General Data Protection Regulation (GDPR) framework.
COVID-19 raised new privacy and data issues, for example, verifying remotely sourced data became a new priority that will likely
endure beyond the pandemic.

Our people and partners play a critical role in safeguarding data. ICON has training in place for all employees and
contingent workers on information security and privacy practices, so that they understand their responsibilities with respect to
data security and privacy.

Sustainable procurement

ICON maintains policies and practices to support responsible, sustainable and ethical business practices and is
committed to working with only those suppliers who embrace high standards of behavior. We manage our suppliers through our
Global Procurement department. The onboarding of new suppliers is completed through a centrally managed due diligence
process. Environmental sustainability, bribery, and corruption risks are a focus of our collective third-party diligence and
management process. We require our suppliers to abide by our Global Supplier Code of Conduct.

ICON performs pre-engagement due diligence on all of our suppliers, this includes screening of sanctions lists,
debarment, and adverse media. Suppliers are periodically re-screened to ensure any potential new findings are captured and
addressed. As part of this process, suppliers are subject to a risk assessment, with suppliers deemed higher risk subject to
enhanced due diligence which may include periodic training, auditing, and assessments. We hold our suppliers accountable for
meeting their contractual obligations, including commitments relating to our Global Supplier Code of Conduct and regulatory
compliance. Contract noncompliance can result in termination of the business relationship and exclusion from future business
our company.

44Sales and Marketing

Our marketing strategy is focused on building a differentiated brand position for ICON and supporting our business
development efforts to develop and build relationships with pharmaceutical, biotechnology, medical device, and government and
public health organizations. Our marketing activities are coordinated centrally to ensure a consistent and differentiated market
positioning for ICON and to ensure all marketing efforts align to the overall strategic objectives of the business. Our business
development teams are located throughout the Americas, Europe and Asia Pacific regions. Business development activities are
carried out by account executives with assigned territories and global account directors supporting our large accounts.
Specialized business development teams focus on growing each of our business areas. Collectively, our business development
team, senior executives and project team leaders share responsibility for the maintenance of key client relationships. Our aim is
to develop deeper relationships within our client base in order to gain repeat business and enable us new opportunities to
penetrate into other therapeutic indications and adjacent service lines.

Competition

The CRO industry is fragmented, consisting of many small, niche service providers, a declining number of medium-
sized providers and a smaller number of large CROs, including ICON, that are differentiated by the scale of their global
operations, breadth of service portfolios and supporting technology infrastructure. The need to conduct complex research and
access patients on a global basis is driving market share to these global CROs. When competing for large development
programs, ICON competes primarily with IQVIA, PAREXEL, Pharmaceutical Product Development ('PPD'), the Covance Drug
Development business of LabCorp and Syneos Health. In some specific markets, for example biotech and mid-tier pharma,
ICON may also compete against mid-tier CROs. Competition also exists for acquisition candidates in addition to competition for
customers.

CROs generally compete on the basis of previous product experience, the ability to recruit patients on a global basis,
the depth of therapeutic and scientific expertise, the strength of project teams, price and increasingly on the ability to apply new
innovation that can drive significant time and cost savings throughout the development process. An evolving area of competition
is the need to provide services that can help generate the evidence of the economic value of new treatments that payers and
regulators require. This requires access to new data sources which includes information to support the identification of suitable
investigator sites and patient populations as well as data on the value delivered by new products following marketing approval.

We believe that we compete favorably in all these areas and we continue to invest in our capabilities to ensure that we

remain competitive in the future.

Customers

During the year ended December 31, 2021, revenue was earned from a wide range of clients. During the year ended
December 31, 2021, 31.6% of our revenues were derived from our top five customers, with no one customer individually
contributing more than 10% of our revenues during the period. Our largest customer represented a strategic partnership with a
large global pharmaceutical company and contributed 8.0% of revenue for the year (see note 17 - Disaggregation of revenue in
the consolidated financial statements).

During the year ended December 31, 2020, 39.1% of our revenues were derived from our top five customers, with one
customers individually contributing more than 10% of our revenues during the period (12.1%). No other customer contributed
more than 10% of our revenues during this period.

During the year ended December 31, 2019, 37.6% of our revenues were derived from our top five customers, with two
customer individually contributing more than 10% of our revenues during the period (The largest contributing 12.5% and the
second largest contributing 10.2%). No other customer contributed more than 10% of our revenues during this period.

The loss of, or a significant decrease in business from one or more of these key customers could have a material

adverse impact on our results of operations.

Unsatisfied Performance Obligation

Our unsatisfied performance obligation consists of contracted revenue yet to be earned from projects awarded by
clients. At December 31, 2021 we had contracted unsatisfied performance obligations of $13.3 billion (see note 18 - Accounts
receivable, unbilled revenue (contract assets) and unearned revenue or payments on account (contract liabilities) in the
consolidated financial statements). We believe that our unsatisfied performance obligation as of any date is not necessarily a
meaningful predictor of future results due to the potential for cancellation or delay of the projects included in the unsatisfied
performance obligation, and no assurances can be given on the extent to which we will be able to realize this unsatisfied
performance obligation as revenue.

45Information Systems

Having access to accurate and timely information is critical in the management, delivery and quality of all aspects of
drug development. ICON utilizes an extensive range of both on premise and cloud based applications that support its services
including clinical trial design and planning, site and patient identification and recruitment, site start-up, patient consent, site
payments, content management, clinical data analysis and real world evidence generation, customer relationship management
(CRM), performance management, compliance and safety reporting and master data management. These solutions are to allow
healthcare companies to manage, optimize and execute their clinical and commercial strategies in an orchestrated manner while
addressing their regulatory obligations.

ICON has developed an informatics strategy built around key platforms including ICONIK and Health Cloud, web-based
information platforms that enable the management, reporting, analysis and visualization of all data relating to drug development.
ICONIK and Health Cloud collects, manage and standardize study data from multiple sources, including Electronic Data Capture
(EDC), patient engagement, EMR/EHR, mobile health, Telehealth, Wearables, central laboratories, Symphony Health and
Imaging platforms to provide a single view of study information. ICONIK and Health Cloud enable ICON to deliver services such
as Risk Based Monitoring (RBM) which uses near-real time clinical data to drive monitoring visit schedules, enabling better
decision making and the successful implementation of clinical trial strategies that significantly improve efficiency in clinical trials
thereby reducing overall cost and time to market whilst better protecting patient safety.

In addition to managing clinical data, ICONIK and Health Cloud collect operational data, such as project management,
clinical trials management system (CTMS) and metrics information to drive trial efficiency and transparency. Investigator data,
such as payments, site details and performance, can also be incorporated. ICONIK and Health Cloud – PredictivvTM can be
accessed via a portal that allows clients access to study-related information via a secure web-based environment. Data analysis
from ICONIK and Health Cloud Informatics Hubs and CDRP allows us to enhance the design and delivery of our projects,
through stronger engagement with investigators and patients. Data management and collection is a key business process for
Symphony Health through its Integrated Dataverse (IDV®) platform. Integrated Dataverse (IDV®) is a comprehensive and
longitudinal source of healthcare data in the industry, bringing together our vast claims resources – medical, hospital, and
prescription – with our rich point-of-sale prescription data, non-retail invoice data, and demographic data.

Firecrest, our site management and training technology, is another important component of our informatics strategy.

Firecrest provides an on-line web-based portal to access visit by visit study guides which drive site performance and quality.

ICON also utilizes a range of enterprise applications that enable the delivery of our business services in a global
environment. The focus is to provide ease of access and capture of study information for our staff and clients globally. Our
current information systems are built on open standards and leading commercial business applications from vendors including
Microsoft, Amazon, Oracle, Dell, SAS, Veeva, Dassault, Salesforce and BOX. IT expenditure is authorized by strict IT
governance policies requiring senior level approval of all strategic IT expenditure based on defined business strategy and
measurable business benefits.

In Clinical Operations, we have deployed a suite of software applications that assist in the management and tracking of
our clinical trial activities. These software applications are both internally developed and commercially available applications from
external vendors. These include a clinical trial management application that tracks all relevant data in a trial and automates all
management and reporting processes. In our Data Management function, we have both leading clinical data management
solutions including EDC and Clinical Data Warehouse solutions from external vendors as well as our proprietary EDC capability
NEXTrials Prism eClinical. This allows us to guarantee the integrity of client data and provide consolidated information across
client studies.

Within Clinical Operations ICON also provides its Connected Health Services enabling the delivery of Decentralised and
Hybrid Clinical Trial services, maximizing patient recruitment and retention and at the same time expanding access to diverse
and remote patient populations. We develop strategic, flexible approaches that leverage clinical informatics, state-of-the-art
technologies, and our global reach to maximize safety and efficiency and make data-driven decisions for every study.

In our clinical trials management area Firecrest Clinical provides a comprehensive site performance management
system that improves compliance, consistency and efficient execution of activities at investigative sites. The web-based solution
enables accurate study information, including protocol information, training manuals and case report forms, to be rolled out
quickly and simultaneously to sites. Site behavior can then be tracked to ensure training is understood, procedures are being
followed, timelines are met and study parameters are maintained. As well as meeting day to day operational requirements, these
systems are feeder systems into the ICONIK and Health Cloud platforms.

We provide interactive response technology (IXR) to enable centralized patient randomization, drug inventory
management, patient diary collection, providing our clients with a fully flexible multi-channel data retrieval solution which can be
utilized via telephone, internet browser or a mobile device. In our central laboratory business, we utilize a comprehensive suite of
software, including a laboratory information management system (LIMS), a kit / sample management system and a web interface
system to allow clients to review results online. Our Laboratory also utilizes IMRA, a web based laboratory review application that
allows global access to the latest laboratory data on a study - it facilitates detailed analysis of any trends, signals, alerts or
patient-specific data on a real-time basis. ICON provides imaging services through the use of its internally developed MIRA

46platform and also utilizes Medidata’s Rave Commercial Imaging for collecting, managing and processing data to support its
imaging capabilities.

ICON provides its Pharmacovigilance Services using Oracle’s ARGUS safety database, the system is FDA regulation
21 CFR Part 11 compliant and generates all the standard regulatory required reports as well the periodic reports required to
support operations.

ICON supports Population Pharmacokinetics and Pharmacokinetic Pharmacodynamic modeling through the use of its
proprietary software NONMEM®. NONMEM® is a nonlinear mixed effects modeling tool that can be used to fit models to many
different types of data. Statistical analysis with NONMEM® using the appropriate model helps pharmaceutical companies
determine appropriate dosing strategies for their products, and increase their understanding of drug mechanisms and
interactions. NONMEM® can also be accompanied with PDx-Pop proprietary software. PDx-Pop software is a graphical interface
for NONMEM® which has its own automation methodology which expedites the iterative process of population pharmacokinetic
modeling and analysis. ICON also utilizes PREDPP - a powerful package of subroutines handling population PK data as well as
general linear and nonlinear models, which can free the user from coding standard kinetic-type equations while simultaneously
allowing complicated patient-type data to be easily analyzed and NM-TRAN - a preprocessor allowing control and other needed
inputs to be specified in a user-friendly manner.

ICON's configurable Real World Data “Evidence” platform is a fit-for-purpose solution to support and enhance
observational research. The platform gathers disparate real world data assets into a common data model, provides analytics to
support multiple audiences across the product lifecycle, and serves as a central repository and analytic platform for all Real
World Data assets.

ICON’s Integrated Dataverse (IDV®), one of the largest integrated repositories of healthcare data consisting of 280
million patient lives, 1.8 million Prescribers and 16 thousand health plans provides powerful data, applications, analytics, and
consulting to help companies gain deep insight into the pharmaceutical market. We transform data into decisions and give
deeper insight into the relationships that sponsor brands have with the market by allowing a holistic view of the impacts of payer,
prescriber, and patient behavior. Our proprietary Tokenisation technology Synoma® simplifies the anonymization, exchange and
connection of industry data sources to provide an integrated view of a patient’s data.

The Company’s global finance operations utilize Oracle’s eBusiness suite, with the integrated Excel4Apps reporting
tool, to serve the organization’s financial and project accounting requirements. Lawson ERP software and OneStream reporting
software is also used by finance operations. Workday and Infor® Global Human Resources ("GHR") is used to fulfill our HR
people management requirements.

The Company’s strategy of using technology to enhance our global processes is evident from our deployment of
platforms like ICONIK and Health Cloud, Metrics Stream and Veeva EDMS/QMS, our global SOP Document Management
system, our Web-based training delivery solution, iLearn and Cornerstone, workflow and automation platforms such as
ServiceNow, Sailpoint for identity management and governance and Pega and ARGUS for pharmacovigilance. The Electronic
Trial Master File is delivered via ICON’s proprietary software ICOMaster or the Wingspan and PhlexGlobal software platforms.
Our business development and contracting teams use Salesforce CRM.

Our IT systems are operated from two data center hubs in Europe - Dublin, Ireland, Groningen, Netherlands; four in
North America - Philadelphia, Pennsylvania, Lenexa, Kansas, Charlottesville, Virginia, Dallas, Texas and one in Asia located in
Singapore. These hubs reside within purpose-built data center facility locations. Other offices are linked to these hubs through a
network managed by Verizon, a tier one global telecommunications provider. This network provides global connectivity for our
applications and allows collaboration and communication using tools like Microsoft Teams, Cisco Jabber, WebEx, Sharepoint and
Box. Mobile staff can also access all systems via secure remote access facilities. A global corporate intranet portal provides
access to all authorized data and applications for our internal staff as well as providing an internal platform for company-wide
communication. IT systems are protected with robust information security controls which are independently audited biannually as
part of maintaining ICON’s ISO27001:2013 certification.

ICON enables its patient site and data strategy through the services delivered via Accellacare, and through our
partnerships with Oncacare and Veradigm Allscripts, where we work with biopharmaceutical companies and other life science
providers (e.g. medical devices companies) to develop and deploy bespoke stakeholder engagement solutions. ICON’s patient
engagement services enable site staff to engage directly with patients to help improve their disease and medication
understanding through interventional and non-interventional support.

ICON provides its Phase I clinical development services in state of the art facilities in the Netherlands and North

America as well as an Innovative Patient Pharmacology model in Central and Eastern Europe.

ICON is the leading provider of Functional Service Provision (FSP) globally. Our team of operational, functional and
therapeutic specialists offer a range of FSP models. We offer FSP solutions across all major functions from clinical monitoring
and project management through data management, statistical programming and beyond. Our teams leverage either Sponsor or

47ICON’s IT Infrastructure and extensive experience managing the migration of systems can support system upgrades as part of
the ramp-up phase.

ICON provides molecular diagnostic laboratory capabilities that enables the development and commercialization of

precision medicines in oncology.

Other key innovations and new technologies include;

•

FLEX ADVANTAGE, our interactive response technology platform (accessible through the web and web-enabled mobile
devices) for managing patient randomization, investigator sites and clinical suppliers.
PubsHub brings speed and efficiency to medical teams by delivering easy-to-use, web-based solutions that bridge
process gaps for system harmonization across companies. ICON utilizes PubsHub to automate medical and scientific
communications and publications management.
The ICON Patient Engagement Platform features an easy to navigate, user friendly website enabling patients to explore
new and ongoing studies available, opt-in and connect with their nearest clinical research site.
One Search, an intuitive, integrated workflow and interrogation tool from ICON, enables access to multiple data sources
and provides the visualization and tools necessary for optimum site identification based on ICON and industry data of
capability, experience and performance. Scoring on enrollment performance, speed of start-up and quality supports
better site selection.
ADDPLAN for simulation and design of exploratory/pilot and confirmatory/pivotal adaptive clinical trials (ADDPLAN® DF
(Dose Finder), ADDPLAN® Base, ADDPLAN® MC (Multiple Comparison) and ADDPLAN® PE (Population
Enrichment)).
AptivAdvantage which is an integrated platform comprising EDC, randomization and drug supply management
specifically created for execution of adaptive clinical trials and used to deliver risk-based monitoring; and Aptiv Insite
which is a novel approach to risk-based monitoring, using Verification by Statistical Sampling (VSS) to manage data
quality and site related risks.
Sample Inventory Management System (SIMS) is an interactive reporting module in ICOLabs for use by sponsors and
study teams. It offers near real time, high level traceability of all patient samples in a clinical trial as they move from
accessioning through disposition. SIMS provides detailed sample inventory reports and summaries of sample status
and location with drill down capabilities. It helps locate samples more rapidly, particularly at critical study junctures.
Unified Platform - Virtual/Hybrid Trials. Utilizing a combination of ICON developed capabilities in conjunction with
commercially available software, ICON brings trials directly to patients, thus allowing diverse and difficult to recruit
patient populations to be accessed.
APECS - for Investigator Payments ensures timely and accurate payments to sites for the work performed in the care
and management of patients as they participate within clinical trials.
The PredictivvTM platform is a fully integrated solution for designing, planning, managing and optimizing the execution
of global clinical studies. Designed around a unified Sales Force platform that harmonizes data, processes, and people
across every aspect of a clinical study, PredictivvTM enables unprecedented adaptive intelligence and decision support
for the ever-increasing complexities of the clinical development process.
EXACT™ allows users quickly to construct re-usable programs for data extraction, data transformation, statistical
reporting and electronic publishing, in a visual environment with limited code writing. The EXACT™ system is used to
simplify and automate the production of multiple Clinical Data Interchange Standards Consortium (CDISC) guidelines as
well as tables, figures and listings in trial reports.

Contractual Arrangements

We are generally awarded projects based upon our responses to requests for proposals received from companies in the
pharmaceutical, biotechnology and medical device industries, or work orders executed under our strategic partnership
agreements.

Revenues on long term contracts are recognized based on an assessment of progress towards completion. Payment
terms usually provide either for payments based on the delivery of certain identified milestones, units delivered or monthly
payments, according to a contracted payment schedule over the life of the contract. Where clients request changes in the scope
of a trial or in the services to be provided by us, a change order or amendment is issued which may result either in an increase or
decrease in the contract value. We also contract on a "fee-for-service" or "time and materials" basis.

Contract periods may range from several weeks to several years depending on the nature of the work to be performed.
In most cases, an upfront portion of the contract fee is paid at the time the study or trial is started. The balance of the contract fee
is generally payable in installments over the study or trial duration and may be based on the completion of certain performance
targets or "milestones", on units delivered, or on a fixed monthly payment schedule. For instance, installment payments may be
based on patient enrollment dates or delivery of the database.

48The progress towards completion for clinical service contracts is measured based on total project costs (direct fees are
therefore inclusive of third party costs). Reimbursable costs include payments to investigators, travel and accommodation costs
and various other expenses incurred over the course of the clinical trial which are fully reimbursable by the client. Reimbursable
expenses are included within direct costs. Reimbursable expenses are included within the contract and are invoiced on a
monthly basis based on actual expenses incurred. Expenses incurred are determined by reference to activity.

As the currency in which contracts are priced can be different from the currencies in which costs relating to those
contracts are incurred, we usually negotiate currency fluctuation clauses in our contracts which allow for price adjustments if
changes in the relative value of those currencies exceed predetermined tolerances.

Most of our contracts are terminable immediately by the client with justifiable cause or with 30 to 90 days’ notice without
cause. In the event of termination, we are usually entitled to all sums owed for work performed and expenses incurred through
the notice of termination and certain costs associated with termination of the study. Termination or delay in the performance of a
contract occurs for various reasons, including, but not limited to, unexpected or undesired results, production problems resulting
in shortages of the drug, adverse patient reactions to the drug, the client's decision to de-emphasize a particular trial, inadequate
patient enrollment or investigator recruitment.

Risk Management

Our Chief Executive Officer and other members of the executive management team are responsible for day-to-day risk
management of the Company and our Board oversees management's activities through both the full Board and its committees.
Our Chief Executive Officer and other members of the executive management team are members of ICON’s Quality and Risk
Forum, which reviews risk. Our executive management team regularly report to the Board and its Committees to ensure effective
and efficient oversight of our activities and to assist in proper risk management and the ongoing evaluation of management
controls. The Board oversees general business and market risk management, our Audit Committee oversees risk management
with respect to financial statements, accounting and financial controls and our Compensation and Organization Committee
oversees risk management with respect to our compensation plans, policies and procedures and our Nominating and
Governance Committee oversees risks relating to ESG matters. Internal audit reports functionally and administratively to our
Chief Financial Officer and directly to the Audit Committee. With respect to non-financial risk management, including
cybersecurity, legal compliance, privacy and enterprise risk, the Board and its Committees receive updates from the appropriate
executives on the primary risks facing the Company and the measures the Company is taking to mitigate such risks.

Government Regulation

The clinical investigation of new drugs is highly regulated by government agencies. The standard for the conduct of
clinical research and development studies is Good Clinical Practice (“GCP”), which stipulates procedures designed to ensure the
quality and integrity of data obtained from clinical testing and to protect the rights and safety of clinical subjects.

The FDA and other prominent regulators have promulgated regulations and guidelines that pertain to applications to
initiate trials of products, the approval and conduct of studies, report and record retention, informed consent, applications for the
approval of drugs and post-marketing requirements. Pursuant to these regulations and guidelines, service providers that assume
the obligations of a drug sponsor are required to comply with applicable regulations and are subject to regulatory action for
failure to comply with such regulations and guidelines. In the United States and Europe, the trend has been in the direction of
increased regulation and enforcement by the applicable regulatory authority.

In providing services in the United States, we are obligated to comply with FDA requirements governing such activities.
These include ensuring that the study is approved by an appropriate Independent Review Board (“IRB”) and Ethics Committee,
obtaining patient informed consents, verifying qualifications of investigators, reporting patients’ adverse reactions to drugs and
maintaining thorough and accurate records. We must maintain critical documents for each study for specified periods, and such
documents may be reviewed by the study sponsor and the FDA.

The services we provide outside the United States are ultimately subject to similar regulation by the relevant regulatory

authority. In addition, our activities in Europe are affected by the European Medicines Agency.

We must retain records for each study for specified periods for inspection by the client and by the applicable regulatory
authority during audits. If we fail to comply with applicable regulations and guidelines, it could result in a material adverse effect.
In addition, our failure to comply with applicable regulations and guidelines, depending on the extent of the failure, could result in
fines, debarment, termination or suspension of ongoing research, the disqualification of data or litigation by clients, any of which
could also result in a material adverse effect.

49Potential Liability and Insurance

The nature of our business exposes us to potential liability including, but not limited to, potential liability for (i) breach of
contract or negligence claims by our customers; and, (ii) third party (such as patients) claims in respect of our performance of
services.

In addition, although we do not believe we are legally responsible for acts of third party investigators (physicians running

trials), we could be subject to claims arising as a result of the actions of these investigators.

We try to reduce this potential liability by:

• Seeking contractual indemnification from customers in relation to certain activities. However, the terms and scope of
indemnification varies from customer to customer and project to project and the performance of these indemnities is
not secured. As a result, we bear the risk that indemnification may not be relevant or sufficient or that the
indemnifying party may not have the financial ability to fulfill its indemnification obligations. This indemnification does
not protect us against our own acts or omissions such as our negligence or where our performance does not reach
the required contractual, industry or regulatory standard.

• Maintaining worldwide professional liability insurance. While we maintain the types and amounts of insurance we view
as customary in the industries and countries in which we operate, there is no guarantee that we will continue to be
able to maintain such insurance coverage on terms acceptable to us, if at all, or that the relevant policy will respond
and provide cover when we want it to.

We could be materially adversely affected if ICON is required to pay damages or bear the costs of defending or settling
any claim outside the scope of or in excess of a contractual indemnification provision, an indemnifying party does not fulfill its
indemnification obligations, the claim is in excess of the level of our insurance coverage or the relevant circumstances are not
covered by our insurance policies.

C. Organizational Structure

Details of the Company’s significant subsidiaries or entities under the Company's control at December 31, 2021 are as

follows:

Company

ICON Clinical Research S.A.

RPS Research S.A.

ICON Clinical Research PTY Limited

Medpass International Pty Ltd

Pharmaceutical Research Associates Pty Limited

ICON Clinical Research Austria GmbH

RPS Research Austria GmbH

IMP-Logistics Bel, FLLC

DOCS International Belgium N.V.

Pharmaceutical Research Associates Belgium B.V.

RPS Bermuda, Ltd.

ICON Pesquisas Clínicas LTDA.

Pharmaceutical Research Associates Ltda.

RPS do Brasil Serviços de Pesquisas LTDA.

RPS China Inc.

ICON Clinical Research EOOD

Pharmaceutical Research Associates Bulgaria EOOD

ICON Clinical Research (Canada) Inc.

3065613 Nova Scotia Company

Pharmaceutical Research Associates ULC

Services de Recherche Pharmaceutique Srl

Oxford Outcomes LTD.

ICON Life Sciences Canada Inc.

ICON Chile Limitada

PRA Health Sciences Chile SpA

CRS (Beijing) Clinical Research Co., Limited

ICON Clinical Research (Beijing No.2) Co., Ltd

ICON Clinical Research (Beijing) Co., Ltd

PRA Health Sciences China, Inc.

PRA Health Sciences Colombia Ltda.

Research Pharmaceutical Services Costa Rica, LTDA.

Ispitivanja ICON d.o.o
ICON Research Ltd.

Pharm Research Associates d.o.o. za klinicka ispitivanja

ICON Clinical Research s.r.o.

Pharmaceutical Research Associates CZ, s.r.o.

DOCS International Nordic Countries A/S

Pharmaceutical Research Associates Denmark ApS

RPS Egypt (Limited Liability Company)

RPS Estonia OÜ

DOCS International Finland Oy

Pharmaceutical Research Associates Finland Oy

DOCS International France S.A.S.

ICON Clinical Research S.A.R.L.

Mapi Research Trust *

Country

Argentina

Australia

Austria

Belarus

Belgium

Bermuda

Brazil

British Virgin Islands

Bulgaria

Canada

Chile

China

Colombia

Costa Rica

Croatia

Czech Republic

Denmark

Egypt

Estonia

Finland

France

Group ownership

100%

51
Company

Mapi SAS

Pharmaceutical Research Associates Sarl

ReSearch Pharmaceutical Services France S.A.S.

IMP Logistics Georgia LLC

Pharmaceutical Research Associates Georgia LLC

Averion Europe GmbH

DOCS International Germany GmbH

ICON Clinical Research GmbH

Pharmaceutical Research Associates GmbH

Pharmaceutical Research Associates Greece A.E.

RPS Guatemala, S.A.

ICON Clinical Research Hong Kong Limited

PRA Health Sciences (Hong Kong) Limited

ICON Klinikai Kutató Korlátolt Felelősségű Társaság (ICON
Clinical Research Limited Liability Company)

Pharmaceutical Research Associates Magyarország Kutatás-
Fejlesztési Korlátolt Felelősségű Társaság

(Pharmaceutical Research Associates Hungary Research and
Development Ltd.)

RPS Iceland ehf.

ICON Clinical Research India Private Limited

Pharmaceutical Research Associates India Private Limited

Accellacare Limited

DOCS Resourcing Limited

ICON (LR) Limited

ICON Clinical Global Holdings Unlimited Company

ICON Clinical International Unlimited Company

ICON Clinical Research Limited

ICON Clinical Research Property Development (Ireland) Limited

ICON Clinical Research Property Holdings (Ireland) Limited

ICON Holdings Clinical Research International Limited

ICON Holdings Unlimited Company

ICON Investments Five Unlimited Company

ICON Investments Four Unlimited Company

ICON Operational Financing Unlimited Company

ICON Operational Holdings Unlimited Company

Research Pharmaceutical Services (Outsourcing Ireland) Limited

ICON Global Treasury Unlimited Company

PRA Clinical Limited

ICON Clinical Research Israel LTD.

Pharmaceutical Research Associates Israel Ltd.

Pharmaceutical Research Associates Italy S.r.l.

PRA Development Center KK

PRA Health Sciences KK

ICON Japan K.K.

ICON Investments Limited

PRA Health Sciences Kenya Limited

RPS Latvia SIA

UAB RPS Lithuania

Country

France

Georgia

Germany

Greece

Guatemala

Hong Kong

Hungary

Iceland

India

Ireland

Israel

Italy

Japan

Jersey

Kenya

Latvia

Lithuania

Group ownership

100%

52Company

ICON Luxembourg S.à r.l.

ICON CRO Malaysia SDN. BHD.

RPS Malaysia Sdn. Bhd.

ICON Clinical Research México, S.A. de C.V.

Country

Luxembourg

Malaysia

México

Pharmaceutical Research Associates Mexico S. de R.L. de C. V.

México

RPS Research México, S. de R.L. de C.V.

RPS Research Servicios, S. de R.L. de C.V.

DOCS Insourcing B.V.

DOCS International B.V.

ICON Contracting Solutions Holdings B.V.

Pharmaceutical Research Associates Group B.V.

Pharmaceutical Research Associates Holdings B.V.

Pharmaceutical Research Associates Metaholdings B.V.

PRA International B.V.

PRA International Operations B.V.

ReSearch Pharmaceutical Services Netherlands B.V.

ICON Clinical Research (New Zealand) Limited

Pharmaceutical Research Associates New Zealand Limited

RPS Research Norway AS

RPS Panama Inc.

ICON Clinical Research Perú S.A.

RPS Perú S.A.C.

ICON Clinical Research Services Philippines, Inc.

RPS Research Philippines, Inc.

DOCS International Poland Sp. z o.o.

Symphony Clinical Research Sp zoo

Pharmaceutical Research Associates Sp. z o.o.

PRA International Portugal, Unipessoal, Lda.

Research Pharmaceutical Services Puerto Rico, Inc.

ICON Clinical Research S.R.L.

Pharmaceutical Research Associates Romania S.R.L.

ICON Clinical Research (Rus) LLC

Joint Stock Company IMP Logistics

ICON Clinical Research d.o.o. Beograd

Pharmaceutical Research Associates doo Belgrade

ICON Clinical Research (Pte) Limited

Mapi Life Sciences Singapore Pte. Ltd.

Pharmaceutical Research Associates Singapore Pte. Ltd.

ICON Clinical Research Slovakia, s.r.o.

Pharmaceutical Research Associates SK s.r.o.

PRA Pharmaceutical S A (Proprietary) Limited

Accellacare South Africa (PTY) LTD

ICON Clinical Research Korea Yuhan Hoesa/ ICON Clinical
Research Korea Ltd.

Mapi Korea Yuhan Hoesa/ Mapi Korea LLC (In Voluntary
Liquidation)

México

Netherlands

New Zealand

Norway

Panama

Perú

Philippines

Poland

Portugal

Puerto Rico

Romania

Russia

Serbia

Singapore

Slovakia

South Africa

South Korea

Group ownership

100%

53Company

Pharmaceutical Research Associates Korea Limited

ICON Clinical Research España, S.L.

Pharmaceutical Research Associates España, S.A.U.

RPS ReSearch Ibérica, S.L.U.

RPS Spain S.L.

Accellacare España S.L.

DOCS International Sweden AB

PRA International Sweden AB

DOCS International Switzerland GmbH

ICON Clinical Research (Switzerland) GmbH

PRA Switzerland AG

ICON Clinical Research Taiwan Limited

Pharmaceutical Research Associates Taiwan, Inc.

ICON Clinical Research (Thailand) Limited

RPS Research (Thailand) Co., Ltd.

ICON Ankara Klinik Arastirma Dis Ticaret Anonim Sirketi

Pra Turkey Sağlik Araştirma Ve Geliştirme Limited Şirketi

DOCS Ukraine LLC

ICON Clinical Research LLC

IMP-Logistics Ukraine, LLC

Pharmaceutical Research Associates Ukraine, LLC

Accellacare UK Limited

Aptiv Solutions (UK) Ltd

DOCS International UK Limited

ICON (LR) Limited

ICON Clinical Research (U.K.) Limited

ICON Clinical Research (U.K.) No. 2 Limited

ICON Clinical Research (U.K.) No. 3 Limited

ICON Clinical Research (U.K.) No. 4 Limited

ICON Clinical Research (U.K.) No. 5 Limited

ICON Development Solutions Limited

ICON Investments (UK) Ltd

Improving Treatments Limited

Medeval Group Limited

MeDiNova Lakeside Clinical Research Limited

MeDiNova Merc (UK) Limited

VSK (Kenilworth) Limited

IMP Logistics UK Limited

Pharm Research Associates (UK) Limited

Pharm Research Associates Russia Limited (in Voluntary
Liquidation)

Sterling Synergy Systems Limited

ICON Clinical Research Holdings (U.K.) Limited

ICON Clinical Research (U.K.) No. 6 Limited

RPS Global S.A.

RPS Latin America S.A

Country

South Korea

Spain

Sweden

Switzerland

Taiwan

Thailand

Turkey

Ukraine

United Kingdom

Uruguay

Group ownership

100%

54Company

Country

Group ownership

ICON Early Phase Services, LLC

Pharmaceutical Research Associates, Inc.

ClinStar LLC

Nextrials, Inc.

Pharmaceutical Research Associates CIS, LLC

Pharmaceutical Research Associates Eastern Europe, LLC

CRN North America, LLC

ICON Clinical Research, LP

Addplan, Inc.

Beacon Bioscience, Inc

C4 MedSolutions, LLC

CHC Group, LLC

CRN Holdings, LLC

Global Pharmaceutical Strategies Group, LLC

ICON Clinical Investments, LLC

ICON Clinical Research LLC

ICON Laboratory Services, Inc.

ICON Tennessee, LLC

ICON US Holdings Inc.

MMMM Consulting, LLC

MMMM Group, LLC

MolecularMD Corp.

PriceSpective LLC

PubsHub LLC

Care Innovations, Inc.

Care Innovations, LLC

CRI NewCo, Inc.

CRI Worldwide, LLC

International Medical Technical Consultants, LLC

Parallel 6, Inc.

PRA Early Development Research, Inc.

PRA Health Sciences, Inc.

PRA Holdings, Inc.

PRA International, LLC

PRA Receivables, LLC

ReSearch Pharmaceutical Services, LLC

ReSearch Pharmaceutical Services, Inc.

Roy RPS Holdings LLC

RPS Global Holdings, LLC

RPS Parent Holding LLC

Source Healthcare Analytics, LLC

Sunset Hills, LLC

Symphony Health Solutions Corporation

Accellacare of Christie Clinic, LLC

Clinical Resource Network, LLC

DOCS Global, Inc.

USA

100%

55Company

Country

Group ownership

Managed Care Strategic Solutions, L.L.C.

CRI International, LLC

Accellacare of Charlotte, LLC

Accellacare of Hickory, LLC

Accellacare of Raleigh, LLC

Accellacare of Rocky Mount, LLC

Accellacare of Salisbury, LLC

Accellacare of Wilmington, LLC

Accellacare of Winston-Salem, LLC

Accellacare US Inc.

Complete Healthcare Communications LLC

Complete Publication Solutions, LLC

Accellacare of Charleston, LLC

USA

Accellacare of Bristol, LLC
Lifetree Clinical Research, LC
ICON Government and Public Health Solutions, Inc.
*Mapi Research Trust is an association, its members are ICON Subsidiary entities.

USA
USA
USA

D. Description of Property

100%

100%
100%
100%

Our principal executive offices are located in South County Business Park, Leopardstown, Dublin, Republic of Ireland,

where we own an office facility of approximately 15,000 square meters. We lease all other properties.

We maintain sixty-seven offices in Europe; twelve of our offices are in the UK, seven each in Germany and The
Netherlands, five in Spain, three in each of France, Italy, Hungary, Poland and Russia, two in each of Ireland, Israel, Romania,
Sweden, Switzerland and Turkey and one in each of Belarus, Belgium, Bulgaria, the Czech Republic, Georgia, Latvia, Serbia,
Slovakia and the Ukraine. We maintain forty-one offices in North America; thirty-seven in the United States, two in Canada and
two in Mexico. We have twenty-one offices in Asia; six in China (including one in Hong Kong), five in India, two in each of Japan,
Singapore, South Korea and Taiwan and one in each of The Philippines and Thailand. We have two offices in Australia and one
in New Zealand. We have nine offices in South America; three in Brazil, two in Argentina and one in each of Colombia, Chile,
Peru and Guatemala. We maintain one office in South Africa.

Item 4A. Unresolved Staff Comments.

Not applicable.

56Item 5. Operating and Financial Review and Prospects.

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis should be read in conjunction with our consolidated financial statements,
accompanying notes and other financial information, appearing in Item 18. The consolidated financial statements have been
prepared in accordance with U.S. GAAP. The information included in the discussion and analysis below provides details on the
information for the years ended December 31, 2021 and December 31, 2020. Information related to the year ended
December 31, 2019 has not been included. It can be found in the Company's filing of the form 20-F for the year ended
December 31, 2020.

Overview

We are a CRO, providing outsourced development services on a global basis to the pharmaceutical, biotechnology and
medical device industries. We specialize in the strategic development, management and analysis of programs that support all
stages of the clinical development process - from compound selection to Phase I-IV clinical studies. Our vision is to be the
healthcare intelligence partner of choice by delivering industry leading solutions and best in class performance in clinical
development.

We believe that we are one of a select group of CROs with the expertise and capability to conduct clinical trials in most
major therapeutic areas on a global basis and have the operational flexibility to provide development services on a stand-alone
basis or as part of an integrated “full-service” solution. At December 31, 2021, we employed approximately 38,330 employees, in
142 locations in 53 countries. During the year ended December 31, 2021 we derived approximately 47.1%, 46.4% and 6.5% of
our revenue in the United States, Europe, and the rest of the world, respectively.

Revenue consists of fees earned under contracts with third-party clients. In most cases, a portion of the contract fee is
paid at the time the study or trial is started, with the balance of the contract fee generally payable in installments over the study
or trial duration, based on the delivery of certain performance targets or milestones. Revenue from long term contracts is
recognized on a proportional performance method based on the relationship between cost incurred and the total estimated costs
of the trial or on a fee-for-service basis according to the particular circumstances of the contract. As is customary in the CRO
industry, we contract with third party investigators in connection with clinical trials. Investigator costs and certain other third party
costs are included in our assessment of progress towards completion and costs incurred in measuring revenue. Where these
costs are reimbursed by clients, they are included in the total contract value recognized over time, based on our assessment of
progress towards completion.

As the nature of our business involves the management of projects, the majority of which have a duration of one to four
years, the commencement or completion of projects in a fiscal year can have a material impact on revenues earned with the
relevant clients in such years. In addition, as we typically work with some, but not all divisions of a client, fluctuations in the
number and status of available projects within such divisions can also have a material impact on revenues earned from such
clients from year to year.

Termination or delay in the performance of an individual contract may occur for various reasons, including, but not
limited to, unexpected or undesired results, production problems resulting in shortages of the drug, adverse patient reactions to
the drug, the client’s decision to de-emphasize a particular trial or inadequate patient enrollment or investigator recruitment. In
the event of termination the Company is usually entitled to all sums owed for work performed through the notice of termination
and certain costs associated with the termination of the study. In addition, contracts generally contain provisions for renegotiation
in the event of changes in the scope, nature, duration, or volume of services of the contract.

Our unsatisfied performance obligation comprises our assessment of contracted revenue yet to be earned from projects
awarded by clients. At December 31, 2021 we had unsatisfied performance obligations of approximately $13.3 billion. We believe
that our unsatisfied performance obligation as of any date is not necessarily a meaningful predictor of future results, due to the
potential for cancellation or delay of the projects included in the unsatisfied performance obligation, and no assurances can be
given on the extent to which we will be able to realize the unsatisfied performance obligation.

On July 1, 2021, ICON announced the completion of the Acquisition of PRA. The combined Group retained the name
ICON and brought together approximately 38,000 (as at the Merger date) employees across the globe, creating one of the
world’s most advanced healthcare intelligence and clinical research organizations. The combined Company leverages its
enhanced operations to transform clinical trials and accelerate biopharma customers’ commercial success through the
development of much needed medicines and medical devices. The new ICON has a renewed focus on leveraging data, applying
technology and accessing diverse patient populations to speed up drug development. The operating results of the Group for the
year ended December 31, 2021 are materially impacted by the completion of the Merger and result in large variances when
comparing to the year ended December 31, 2020. Where applicable, management have included commentary on specific one-
time charges related to the Merger in order to provide an understanding of the normal operations of the Group. The
management's discussion and analysis below includes the results of PRA from July 1, 2021 to December 31, 2021. The results
of PRA prior to July 1, 2021 are not reflected.

57Although we are domiciled in Ireland, we report our results in U.S. dollars. As a consequence, the results of our non-
U.S. based operations, when translated into U.S. dollars, could be materially affected by fluctuations in exchange rates between
the U.S. dollar and the currencies of those operations.

In addition to translation exposures, we are also subject to transaction exposures because the currency in which
contracts are priced can be different from the currencies in which costs relating to those contracts are incurred. Our operations in
the United States are not materially exposed to such currency differences as the majority of our revenues and costs are in U.S.
dollars. However, outside the United States the multinational nature of our activities means that contracts are usually priced in a
single currency, most often U.S. dollars or euros, while costs arise in a number of currencies, depending, among other things, on
which of our offices provide staff for the contract and the location of investigator sites. Although many such contracts benefit from
some degree of natural hedging, due to the matching of contract revenues and costs in the same currency, where costs are
incurred in currencies other than those in which contracts are priced, fluctuations in the relative value of those currencies could
have a material effect on our results of operations. We regularly review our currency exposures.

As we conduct operations on a global basis, our effective tax rate has depended and will depend on the geographic
distribution of our revenue and earnings among locations with varying tax rates. Our results therefore may be affected by
changes in the tax rates of the various jurisdictions. In particular, as the geographic mix of our results of operations among
various tax jurisdictions changes, our effective tax rate may vary significantly from period to period.

Operating Results

Assessment of COVID-19 impact on operating results

In the period since December 31, 2020, the Company has continued to experience a return to positive growth in
revenue and net income as a result of the ongoing recovery from the global COVID-19 pandemic. At this point in time, there still
remains some degree of uncertainty relating to the long-term effect of COVID-19 on our business and when it will be possible for
business activity to return to normal operating levels. Although the impact of the global COVID-19 pandemic on our business is
reducing, the emergence of COVID-19 variants of concern continue to create restrictions on our ability to ensure laboratory
samples are collected and analyzed on time, our ability to monitor our clinical trials, the ability of patients or service providers to
travel, and our ability to travel, as a result of the outbreak.

ICON provided clinical trial services to the Pfizer and BioNTech SE investigational COVID-19 vaccine program. ICON
worked with Pfizer and 153 sites in the US, Europe and Latin America to ensure over 44,000 patients were recruited within four
months for phase 3 of the trial, in late 2020, in one of the largest and most expeditious clinical trials ever performed. Trial
capabilities were key to enabling agility and speed in the global study, which included a high level of remote clinical monitoring
and source data verification, in addition to on-site monitoring, safeguarding data quality and integrity in the evolving pandemic
environment.

Revenue for the year ended December 31, 2021 increased by $2,683.5 million, or 95.9%, to $5,480.8 million, compared
to $2,797.3 million for the year ended December 31, 2020. Revenue increased by 94.5% in constant currency terms (Constant
currency revenue growth reflects growth in revenue had foreign exchange rates that existed in 2020 remained constant). The
increase in revenues in the year ended December 31, 2021 reflected the completion of the Merger and the continued recovery
from the impact of the COVID-19 global pandemic. The Company has earned revenue from clinical trials associated with
COVID-19, which include the Pfizer BioNTech COVID-19 vaccine program described above.

58The following table sets forth, for the periods indicated, certain financial data as a percentage of revenue and the
percentage change in these items compared to the prior comparable period. The trends illustrated in the following table may not
be indicative of future results.

Revenue

Costs and expenses:

Direct costs

Selling, general and administrative

Depreciation

Amortization

Transaction and integration related

Restructuring

Income from operations

N/M = Not Meaningful

Year Ended December 31,

2021

2020

2021

Percentage of Revenue

100.0 %

Percentage
Increase/(Decrease)
95.9 %

72.5 %

10.7 %

1.4 %

4.4 %

3.6 %

0.5 %

6.9 %

70.8 %

12.2 %

1.7 %

0.7 %

— %

0.6 %

14.0 %

100.6 %

70.9 %

61.0 %

1,145.2 %

N/M

72.0 %

(3.3) %

Year ended December 31, 2021 compared to year ended December 31, 2020

Revenue

(dollars in thousands)

Revenue

Year Ended
December 31,

Change

2021

2020

5,480,826 $

2,797,288 $

2,683,538

95.9 %

Revenue for the year ended December 31, 2021 increased by $2,683.5 million, or 95.9%, to $5,480.8 million, compared
to $2,797.3 million for the year ended December 31, 2020. Revenue increased by 94.5% in constant currency terms. The
increase in revenues in the year ended December 31, 2021 is due to the Merger and the impact of the continued recovery from
the COVID-19 global pandemic has had on operations including: our ability to ensure laboratory samples are collected and
analyzed on time, our ability to perform on-site monitoring of clinical trials, the ability of patients or service providers to travel, and
our ability to travel. The Company has earned revenue from clinical trials associated with COVID-19, most notably with the Pfizer
BioNTech COVID-19 vaccine program.

Revenues from our top five customers amounted to $1,733.1 million in the year ended December 31, 2021 compared to
$1,092.8 million in the year ended December 31, 2020 or 31.6% and 39.1% respectively. The largest of these customers related
to a strategic partnership with a large global pharmaceutical company.

Revenue in Ireland increased by $184.6 million in the year ended December 31, 2021, to $1,365.9 million, compared to
$1,181.3 million for the year ended December 31, 2020. Revenue in Ireland during the year ended December 31, 2021
increased by 15.6% compared to an overall increase in Group revenue of 95.9%. Revenue in Ireland is principally a function of
our global contracting model (see note 20 - Business segment and geographical information in the consolidated financial
statements). Entities acquired as part of the Merger are currently being integrated into the global contracting model and this
process remains ongoing at December 31, 2021.

Revenue in the Rest of Europe increased by $758.6 million or 182.0%, to $1,175.5 million, compared to $416.9 million
for the year ended December 31, 2020. Revenue in the U.S. increased by $1,655.4 million or 178.9%, to $2,581.0 million,
compared to $925.6 million for the year ended December 31, 2020. Revenue in our Rest of World (‘Other’) region increased by
$84.8 million or 31.0%, to $358.4 million, compared to $273.5 million for the year ended December 31, 2020. Revenue has
increased across all regions principally reflecting the Merger completion and continued recovery from the COVID-19 global
pandemic.

59
Direct costs

(dollars in thousands)

Direct costs

% of revenue

Year Ended
December 31,

2021

2020

Change

3,972,612

1,979,883

1,992,729

72.5 %

70.8 %

100.6 %

Direct costs for the year increased by $1,992.7 million, or 100.6%, to $3,972.6 million, compared to $1,979.9 million for
the year ended December 31, 2020. Direct costs consist primarily of investigator and other reimbursable costs, compensation,
associated fringe benefits and routine share based compensation expense for project-related employees and other direct project
driven costs. The increase in direct costs during the year arose due to an increase in headcount and an increase in personnel
related expenditure of $1,217.2 million, as a result of the Merger, combined with an increase in other direct project related costs
of $22.3 million, an increase in laboratory costs of $17.2 million, an increase in third party investigator and other reimbursable
costs of $734.4 million and an increase in travel related costs of $1.6 million.

Selling, general and administrative expenses

(dollars in thousands)

Year Ended
December 31,

2021

2020

Change

Selling, general and administrative expenses

585,330

342,449

242,881

% of revenue

10.7 %

12.2 %

70.9 %

Selling, general and administrative expenses for the year increased by $242.9 million, or 70.9%, to $585.3 million,
compared to $342.4 million for the year ended December 31, 2020. Selling, general and administrative expenses comprise
primarily of compensation, related fringe benefits and routine share based compensation expense for non-project-related
employees, recruitment expenditures, professional service costs, advertising costs and all costs related to facilities and
information systems. As a percentage of revenue, selling, general and administrative expenses decreased to 10.7% of revenue,
compared to 12.2% of revenue for the year ended December 31, 2020. During the year, the increase in selling, general and
administrative expenses relates to an increase in general overhead costs of $9.0 million, an increase of $58.3 million in facilities
related costs, an increase of $188.1 million in personnel related expenditure and an increase of $8.2 million in marketing fees.
These increases were partly offset by a decrease of $20.1 million due to foreign exchange movements and other immaterial
decreases.

Share based compensation expense recognized during the years ended December 31, 2021 and December 31, 2020
were $133.8 million and $26.3 million respectively (see note 11 - Equity Incentive Schemes and Stock Compensation Charges to
the consolidated financial statements). Share based compensation expenses are part of personnel related expenditure in direct
costs and selling, general and administrative expenses.

Depreciation and amortization

(dollars in thousands)

Depreciation

% of revenue

Amortization

% of revenue

Year Ended
December 31,

2021

2020

Change

75,484

46,892

28,592

1.4 %

1.7 %

61.0 %

239,503

19,234

220,269

4.4 %

0.7 %

1,145.2 %

60Depreciation expense for the year increased by $28.6 million or 61.0%, to $75.5 million, compared to $46.9 million for
the year ended December 31, 2020. The depreciation charge reflects investments in facilities, information systems and
equipment supporting the Company’s continued growth. The depreciation charge, from a value perspective, has increased
mainly due to the additional office footprint acquired through the Merger. As a percentage of revenue, the depreciation expense
decreased to 1.4% of revenues, compared to 1.7% for the year ended December 31, 2020. Amortization expense for the year
increased by $220.3 million or 1,145.2%, to $239.5 million, compared to $19.2 million for the year ended December 31, 2020.
The amortization expense represents the amortization of intangible assets acquired in business combinations. The increase in
amortization expense for the year reflects the amortization of newly acquired intangibles arising on the Merger. As a percentage
of revenue, the amortization expense increased to 4.4%, compared to 0.7% of revenue for the year ended December 31, 2020.

Restructuring, transaction and integration-related expenses associated with the Merger

(dollars in thousands)

Transaction and integration related

% of revenue

Restructuring

% of revenue

N/M = Not Meaningful

Year Ended
December 31,

2021

2020

Change

198,263

(759) $

199,022

3.6 %

— %

N/M

31,105

18,089

13,016

0.5 %

0.6 %

72.0 %

During the year ended December 31, 2021, the Company incurred $229.4 million for restructuring, transaction and
integration-related expenses associated with the Merger. The charge includes transaction and integration costs of $198.3 million
associated with investment banking, advisory costs, retention agreements with employees, accelerated share compensation
charges and ongoing integration activities. The transaction and integration related credit of $0.8 million incurred in the year
ended December 31, 2020 related to the release of contingent consideration net of expenses incurred as part of ICON's recent
acquisitions prior to the Merger.

The Company has also undertaken a restructuring program following the announcement of the Merger to review its
global office footprint, optimize its locations to best fit the requirements of the Company and reorganize its workforce to drive
future growth. This program has resulted in a charge of $31.1 million in the year ended December 31, 2021. In the year ended
December 31, 2020, a restructuring charge of $18.1 million was recognized under a restructuring plan adopted following a review
of operations. The restructuring plan reflected resource rationalization across the business to improve resource utilization.

We expect to incur additional expenses associated with the Merger; however, the timing and the amount of these
expenses depends on various factors such as, but not limited to, the execution of integration activities and the aggregate amount
of synergies we achieve from these activities.

Income from operations

(dollars in thousands)

Income from operations

% of revenue

Year Ended
December 31,

2021

2020

Change

378,529

391,500

(12,971)

6.9 %

14.0 %

(3.3) %

Income from operations decreased by $13.0 million, or 3.3%, to $378.5 million, compared to $391.5 million for the year
ended December 31, 2020. As a percentage of revenue, income from operations decreased to 6.9% of revenues compared to
14.0% of revenues for year ended December 31, 2020.

61(dollars in thousands)

2021

2020

Change

Year Ended
December 31,

Reconciliation to adjusted income from operations

Income from operations

Transaction and integration related

Restructuring

378,529

391,500

(12,971)

198,263

31,105

(759)

18,089

199,022

13,016

199,067

Adjusted income from operations

607,897

408,830

% of revenue

11.1 %

14.6 %

48.7 %

Income from operations, excluding restructuring, transaction and integration related expenses ("adjusted income from
operations") reflects income from operations with restructuring charges and transaction and integration related expenses added
back. The most comparable GAAP measure is income from operations. The amounts added back to income from operations are
presented directly from the consolidated statement of operations and in the notes to the financial statements. Management
believes adjusted income from operations provides stakeholders more insight into underlying business performance. Adjusted
income from operations increased by $199.1 million, or 48.7%, to $607.9 million, compared to $408.8 million for the year ended
December 31, 2020. As a percentage of revenue, income from operations decreased to 11.1% of revenues compared to 14.6%
of revenues for year ended December 31, 2020.

Adjusted income from operations in Ireland decreased by $133.5 million or 45.2% to $161.9 million, compared to $295.4
million for the year ended December 31, 2020. The decrease in the year ended December 31, 2021 is mainly a result of the
amortization charged on the intangible assets acquired in the Merger. Income from operations in Ireland and other geographic
regions are reflective of the Company’s global transfer pricing model and the centralization of intragroup financing activities in
Ireland.

In the Rest of Europe region, adjusted income from operations increased by $148.0 million, to $183.4 million, compared
to $35.4 million for the year ended December 31, 2020. The increase is due to the additional activity in the region as a result of
the Merger. As a percentage of revenues, income from operations, excluding restructuring and transaction related items, in the
Rest of Europe region increased to 15.6% compared to 8.5% for the year ended December 31, 2020.

In the U.S. region, Adjusted income from operations increased by $175.1 million, to $232.0 million, compared to $56.9
million for the year ended December 31, 2020. The increase is due to the additional activity in the region as a result of the
Merger. As a percentage of revenues, income from operations, excluding restructuring and transaction related items, in the U.S.
region increased to 9.0% compared to 6.1% for the year ended December 31, 2020.

In other regions, Adjusted income from operations increased by $9.5 million, to $30.6 million, compared to $21.1 million
for the year ended December 31, 2020. The increase is due to the additional activity in the region as a result of the Merger. As a
percentage of revenues, income from operations, excluding restructuring and transaction related items, in the other regions
increased to 8.5% , compared to 7.7% for the year ended December 31, 2020.

Interest income and expense

(dollars in thousands)

Interest income

Interest expense

Year Ended
December 31,

2021

574 $

2020

Change

2,724 $

(2,150)

78.9 %

(182,423) $

(13,019) $

(169,404)

1,301.2 %

Interest expense increased to $182.4 million compared to $13.0 million for the year ended December 31, 2020 due to
the draw down of debt facilities associated with the Merger and costs related to the extinguishment of previous debt facilities (see
note 24 - Non-current bank credit lines and loan facilities to the consolidated financial statements). No amounts were drawn
down on the revolving credit facilities during the year ended December 31, 2021 or the year ended December 31, 2020. Interest
income for the year ended December 31, 2021 decreased to $0.6 million, compared to $2.7 million for the year ended
December 31, 2020. This reflects reduced returns on cash and cash equivalents.

Income tax expense

(dollars in thousands)
Income tax expense
Effective income tax rate

Year Ended
December 31,

Change

2021

2020

41,334

47,875

(6,541)

(13.7) %

21.0 %

12.6 %

Provision for income taxes for the year decreased to $41.3 million compared to $47.9 million for the year ended
December 31, 2020. The Company’s effective tax rate for the year ended December 31, 2021 was 21.0% compared to 12.6% for
the year ended December 31, 2020. The Company’s effective tax rate remains principally a function of the distribution of pre-tax
profits amongst the territories in which it operates and the tax treatment of costs related to the Merger.

Liquidity and Capital Resources

The CRO industry is generally not capital intensive. The Group’s principal operating cash needs are payment of
salaries, office rents, travel expenditures and payments to investigators. Investing activities primarily reflect capital expenditures
for facilities and information systems enhancements, the purchase and sale of short term investments and acquisitions.
Financing activities primarily reflect the servicing of the Company's external debt.

Our clinical research and development contracts are generally fixed price with some variable components and range in
duration from a few weeks to several years. Revenue from contracts is generally recognized as income on the basis of the
relationship between costs incurred and the total estimated contract costs. The cash flow from contracts typically consists of a
small down payment at the time the contract is entered into, with the balance paid in installments over the contract duration, in
some cases on the achievement of certain milestones. Therefore, cash receipts do not correspond to costs incurred and revenue
recognized on contracts.

Cash and cash equivalents and borrowings (net)

Balance
December
31, 2020

Drawn down/
(repaid)

Net cash
inflow/
(outflow)
dollars in thousands

Other non-
cash
adjustments

Effect of
exchange
rates

Balance
December
31, 2021

Cash and equivalents

Cash and cash equivalents

Available for sale investments

Total cash and cash equivalents

840,305

1,729

842,034

—

(80,365)

(17)

(80,382)

—

(7,727)

752,213

—

1,712

(7,727)

753,925

Balance
December
31, 2020

Drawn down/
(repaid)

Net cash
inflow/
(outflow)

Other non-
cash
adjustments

Effect of
exchange
rates

Balance
December
31, 2021

dollars in thousands

Borrowings

2020 Senior Notes

Senior Secured Credit Facilities
& Senior Secured Notes

348,477

(363,992)

—

15,515

—

6,015,000

(589,986)

11,298

—

5,436,312

Total borrowings

348,477

5,651,008

(589,986)

26,813

—

5,436,312

Net cash and cash equivalents
and borrowings

493,557

(5,651,008)

509,604

(26,813)

(7,727)

(4,682,387)

The Company’s cash and cash equivalents and available for sale investments at December 31, 2021 amounted to
$753.9 million compared with cash and available for sale investments of $842.0 million at December 31, 2020. The Company’s
cash and short term investment balances at December 31, 2021 comprised cash and cash equivalents $752.2 million and short-
term investments $1.7 million. The Company’s cash and short term investment balances at December 31, 2020 comprised cash
and cash equivalents $840.3 million and short-term investments $1.7 million.

In conjunction with the completion of the Merger Agreement, on July 1, 2021, ICON entered into a credit agreement
providing for a senior secured term loan facility of $5,515 million and a senior secured revolving loan facility in an initial
aggregate principal amount of $300 million (the "Senior Secured Credit Facilities"). The proceeds of the senior secured term loan
facility were used to repay in full (i) PRA’s existing credit facilities and (ii) the Company's private placement notes outstanding
and fund, in part, the transaction. The senior secured term loan facility will mature in July 2028 and the revolving loan facility will
mature in July 2026. No amounts have been drawn under the revolving loan facility as at December 31, 2021.

In addition to the Senior Secured Credit Facilities, on July 1, 2021, the Company, issued $500 million in aggregate
principal amount of 2.875% senior secured notes in a private offering. The senior secured notes will mature on July 15, 2026 and
will bear interest at a rate of 2.875%.

The Company has contractual liabilities for lease arrangements of $227.7 million which will be predominantly settled

over the next five year period through cash payments.

The Company also has tax related liabilities of $217.0 million which are predominantly long term in nature with $112.0
million expected to be settled in the next five year period. The balance of $105.0 million is expected to be settled beyond that five
year period.

On December 8, 2020, ICON Investments Five Unlimited Company issued new senior notes ("2020 Senior Notes") for
aggregate gross proceeds of $350.0 million in a private placement which was guaranteed by ICON plc. The 2020 Senior Notes
were issued in two tranches; Series A Notes of $275.0 million maturing on December 8, 2023 and Series B Notes of $75.0 million
maturing on December 8, 2025. Interest payable on the 2020 Senior Notes was fixed at 2.32% and 2.43% for Series A Notes and
Series B Notes respectively. Due to the conditions attached to the additional borrowings to fund the PRA Merger, the 2020 Senior
Notes were repaid in full on July 1, 2021 inclusive of early repayment charges. The total repayment on July 1, 2021 was $364.0
million.

The Company entered into an interest rate hedge in respect of the planned issuance of the 2020 Senior Notes in June
2020. The interest rate hedge matured in July 2020 when the interest rates on the 2020 Senior Notes was fixed. The interest rate
hedge was effective in accordance with ASC 815 'Derivatives and Hedging'. There was a cash outflow on maturity in July 2020 of
$0.9 million, representing the realized loss on the interest rate hedge. The unamortized portion of this loss has been released in
the period in line with the commitment to early settle the 2020 Senior Notes.

On December 15, 2015, ICON Investments Five Unlimited Company issued Senior Notes for aggregate gross proceeds
of $350.0 million in a private placement. Interest payable was fixed at 3.64%, and was payable semi-annually on the Senior
Notes on each June 15 and December 15, commencing June 15, 2016. The Senior Notes were guaranteed by ICON plc and
matured on December 15, 2020 at which time they were repaid in full.

Cash flows

Net cash from operating activities

Net cash provided by operating activities was $829.1 million for the year ended December 31, 2021 compared with net
cash provided by operating activities of $568.0 million for the year ended December 31, 2020. The dollar value of working capital
balances and the related number of days’ revenue outstanding (i.e. revenue outstanding as a percentage of revenue for the
period, multiplied by the number of days in the period) can vary over a study or trial duration. The number of days’ revenue
outstanding at December 31, 2021 was 31 days compared to 57 days at December 31, 2020. This reflects the timing of cash
collections and individual contractual terms. Contract fees are generally payable in installments based on the achievement of
certain performance targets or “milestones” (e.g. target patient enrollment rates, clinical testing sites initiated or case report forms
completed), such milestones being specific to the terms of each individual contract, while revenues on contracts are recognized
as contractual obligations are performed. Billed and unbilled revenue also includes amounts recoverable from customers in
respect of reimbursable costs. Amounts recorded as accrued to investigators and others in respect of reimbursable expenses
were $323.6 million at December 31, 2021 and $138.2 million at December 31, 2020 (see note 8 - Other liabilities in the
consolidated financial statements).

64Contractual terms with our customers require ICON to receive and discharge payment to third parties prior to billing the
customer for these items. During the year, unearned revenue increased to $1,324.0 million from $660.9 million at December 31,
2020 (see note 18 - Accounts receivable, unbilled revenue (contract assets) and unearned revenue or payments on account
(contract liabilities) in the consolidated financial statements). These fluctuations are primarily due to the balance acquired as part
of the Merger but are also due to timing of payments and invoicing related to the Group's clinical trial management contracts.
These advance billings and the completion of the Merger have resulted in the significant increase in unearned revenue at
December 31, 2021. During the year, cash from other net assets increased to a $108.3 million inflow from a $2.2 million outflow
at December 31, 2020. These fluctuations are primarily due to the balance acquired as part of the Merger and increases in tax
related liabilities.

Cash generated from operations, and days’ revenue outstanding may be positively or negatively impacted by, amongst
others, the scheduling of contractual milestones over a study or trial duration, the achievement of a particular milestone during
the period, the timing of receipt of invoices from third parties for reimbursable costs and the timing of cash receipts from
customers. A decrease in the number of days’ revenue outstanding during a period will result in cash inflows to the Company
while an increase in days revenue outstanding will lead to cash outflows.

Net cash used in investing activities

Net cash used in investing activities was $6,024.2 million for the year ended December 31, 2021 compared to net cash
used in investing activities of $46.6 million for the year ended December 31, 2020. Net cash used in investing activities the year
ended December 31, 2021 was largely attributable to the cash element of the Merger consideration of $5,914.5 million (net of
cash acquired). During the year, capital expenditure of $93.8 million was made mainly related to investment in facilities and IT
infrastructure. Further cash outflow of $2.5 million was made in respect of the Company's investment in Oncacare, a loan of
$10.0 million was provided to Oncacare and $3.6 million in relation to investments in long-term equity.

In the year ended December 31, 2020, net cash used in investing activities of $46.6 million was largely attributable to
cash outflows on the acquisitions of MedPass of $47.6 million on January 22, 2020, cash outflows of $0.3 million in relation to the
working capital adjustment on the acquisition of Symphony which was acquired on September 24, 2019, cash outflows of $0.5
million in relation to the contingent consideration paid for Symphony in the period and a cash inflow of $0.5 million in relation to
the working capital adjustment for MeDiNova which was acquired on May 23, 2019. These amounts were offset in part by cash
acquired of $10.2 million. A cash outflow of $2.5 million was made in respect of the Company's investment in Oncacare. During
the year, capital expenditure of $40.9 million was made mainly related to the investment in facilities and IT infrastructure. In
addition, $47.9 million was generated by the sale of short term investments and $3.2 million cash was paid in relation to
investments in long-term equity.

Net cash used in financing activities

Net cash provided by financing activities amounted to $5,114.7 million for the year ended December 31, 2021 compared
with net cash outflow from financing activities of $208.3 million for the year ended December 31, 2020. The Company drew down
external financing of $6,015 million to fund the completion of the Merger. This was offset by debt discount and certain debt issue
costs of $109.9 million. As part of the external financing, the Company paid financing professional fees of $30.3 million and made
payments of principal on the external debt of $513.8 million. The Company also repaid the 2020 Senior Notes on 1 July 2021,
including early repayment charges, totaling $364.0 million. During the year ended December 31, 2021, $118.6 million was
received by the Company from the exercise of share options.

In the year ended December 31, 2020, cash outflows in respect of financing activities includes consideration paid by the
Company for share buybacks pursuant to the Company’s share repurchase program totaling $175.0 million in the year ended
December 31, 2020 (see note 13 - Share Capital in the consolidated financial statements). In December 2020, $350.0 million
was received in respect of the issue of the 2020 Senior Notes and $350.0 million was paid in respect of the repayment of the
2015 Senior Notes. Finance costs in respect of the issue of the 2020 Senior Notes were $1.6 million and there was a cash
outflow of $0.9 million in respect of the loss on settlement of the interest rate hedge on the 2020 Senior Notes. There were cash
outflows of $43.9 million in relation to the purchase of the remaining share capital in MeDiNova. In addition, $13.2 million was
received by the Company from the exercise of share options.

Net cash outflow

As a result of these cash flows, cash and cash equivalents decreased by $88.1 million for the year ended December 31,

2021 compared to an increase of $320.0 million for the year ended December 31, 2020.

65C.

Research and development, patents and licenses

ICON plays a critical role in new drug development by undertaking activities in each of the different stages of the drug
development process. Clinical trials result in an advancement in the field of medical science as they establish the safety and
efficacy of new drugs, thus resolving scientific uncertainty. As one of a number of world leaders in clinical research and
commercialization, ICON is a trusted partner for pharmaceutical and medical device companies in helping them to accelerate the
development of drugs and devices that save lives and improve the quality of life. ICON's role in ensuring that the trial design is
scientifically valid is a crucial part of the design and involves scientists, medical doctors and biostatisticians. ICON works with the
sponsors in designing the conduct of the clinical research trial. ICON's role of conducting clinical trials is an integral part of the
research and development process leading ultimately to a decision as to whether or not each drug is safe for human
consumption, has the desired effect on targeted diseases and the best means of delivering that drug to the patient.

Trend information

Other than as disclosed elsewhere in this annual report, we are not aware of any trends, uncertainties, demands, or
commitments or events since December 31, 2021 that are reasonably likely to have a material adverse effect on our revenues,
income, profitability, liquidity or capital resources, or that would cause the reported financial information in this annual report to be
not necessarily indicative of future operating results or financial conditions.

Critical Accounting Policies and Estimates

The preparation of consolidated financial statements in accordance with generally accepted accounting principles in the
United States requires management to make estimates and judgments that affect the reported amounts of assets and liabilities
at the date of the financial statements and the reported amounts of revenues and expenses during the reported period.
Significant accounting policies are summarized in Note 1 to the consolidated financial statements.

We base our estimates and judgments on historical experience and on the other factors that we believe are reasonable
under current circumstances. Actual results may differ from these estimates if these assumptions prove to be incorrect or if
conditions develop other than as assumed for the purposes of such estimates. The following is a discussion of the accounting
policies used by us, which we believe are critical in that they require estimates and judgments by management. The application
of these critical accounting policies and estimates is discussed with the Audit Committee of the Board of Directors.

Revenue Recognition

Significant management judgments and estimates must be made and used in connection with the recognition of
revenue in any accounting period. Material differences in the amount of revenue in any given period may result if these
judgments or estimates prove to be incorrect or if management’s estimates change on the basis of development of the business
or market conditions. To date there have been no material differences arising from these judgments and estimates.

We earn revenues by providing a number of different services to our clients. These services, which are integral
elements of the clinical development process, include clinical trials management, contract staffing, consulting and laboratory
services. Contracts range in duration from a number of months to several years. The criteria for revenue recognition is based on
five steps: (1) identify the contract(s) with a customer; (2) identify the performance obligation in the contract; (3) determine the
transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue
when (or as) the entity satisfies the performance obligation.

Clinical trial services are a single performance obligation satisfied over time i.e. the full-service obligation in respect of a
clinical trial (including those services performed by investigators and other parties) is considered a single performance obligation.
Promises offered to the customer are not distinct within the context of the contract. We have concluded that ICON is the contract
principal in respect of both direct services and in the use of third parties (principally investigator services) that support the clinical
research project. The transaction price is determined by reference to the contract or change order value (total service revenue
and pass-through/ reimbursable expenses) adjusted to reflect a realizable contract value. An assessment of the realizable
contract value is judgmental in nature. The realizable value assessment is updated at each reporting period, having regard to (i)
contract terms and (ii) customer experience.

Revenue is recognized on a percentage completion basis as the single performance obligation is satisfied. The
progress towards completion for clinical service contracts is measured therefore based on an input measure being total project
costs (inclusive of third party costs) at each reporting period. Measurement of the progress towards completion involves
judgment and estimation. Assessment of completion requires an evaluation of labor and related time cost incurred at the
reporting date and third party costs incurred at the reporting date. The assessment of third party costs incurred (principally
investigator costs) requires a review of activity performed and recorded by the third party services providers. The timing of
payments to third parties in respect of cost incurred reflect invoicing by third parties. The timing difference between the activity
performed and receipt of invoices from third parties may result in significant accrued amounts at reporting periods.

66
The assessment of progress towards completion also requires an up to date evaluation of the forecast costs to
complete in respect of these projects. Given the long-term nature of the clinical trials, and the complex nature of those trials, the
forecast costs to complete (being internal direct costs and costs that will be incurred by third parties (principally investigators)) is
judgmental. Forecast time (and related costs) is determined by reference to (i) contract terms and (ii) past experience. Forecast
third party costs to complete are determined by project by reference to (i) contract terms and (ii) past experience.

The Company provides data services to customers based on agreed-upon specifications, including the timing of
delivery, which is typically either weekly, monthly, or quarterly. If a customer requests more than one type of data report or series
of data reports within a contract, each distinct type of data report is a separate performance obligation. The contracts provide for
the Company to be compensated for the value of each deliverable. The transaction price is determined using list prices, discount
agreements, if any, and negotiations with the customers, and generally includes any out-of-pocket expenses.

The Company enters into contracts with some of its larger data suppliers that involve non-monetary terms. The
Company issues purchase credits to be used toward the data supplier's purchase of the Company's services based on the fair
value of the data obtained. In exchange, the Company receives monetary discounts on the data received from the data suppliers.
The fair value of the revenue earned from the customer purchases is recognized as services are delivered as described above.
At the end of the contract year, any unused customer purchase credits may be forfeited or carried over to the next contract year
based on the terms of the data supplier contract. The calculation of the fair value of certain non-monetary terms involves
management judgement and estimation.

Intangible Assets acquired in a business combination

Significant management judgments and estimates must be made and used in connection with the recognition of
intangible assets associated with a business combination. The cost of a business combination is measured as the aggregate of
the fair values at the date of exchange of assets given, liabilities incurred or assumed and equity instruments issued in exchange
for control. The assets, liabilities and contingent liabilities of businesses acquired are generally measured at their fair values at
the date of acquisition. When the initial accounting for a business combination is determined provisionally, any subsequent
adjustments to the provisional values allocated to the identifiable assets, liabilities and contingent liabilities are made within
twelve months of the acquisition date and presented as adjustments to goodwill in the reporting period in which the adjustments
are determined.

Measurement of intangible assets involves the use of estimates for determining the fair value at the acquisition date.
The determination of the fair values of assets and liabilities, as well as of the useful lives of the assets is based on
management’s judgment. The valuation of intangible assets required management to develop discounted cash flow models
which required the use of reasonable and supportable inputs such as customer attrition data, discount rates developed from
various weighted average cost of capital assumptions, growth rates, margin forecasting and assessment of useful lives.
Management utilized external valuation experts, where necessary, to ensure the valuation process was sufficiently detailed and
robust to develop reliable valuations.

Impact of New Accounting Pronouncements

Impact of new accounting pronouncements adopted during fiscal year ended December 31, 2021 (or previously)

Business combinations

In October 2021, the FASB issued ASU 2021-08 'Business Combinations (Topic 805) - Accounting for Contract Assets
and Contract Liabilities from Contracts with Customers'. The amendments in this ASU require that an entity (acquirer) recognize
and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606. At the
acquisition date, an acquirer should account for the related revenue contracts in accordance with Topic 606 as if it had originated
the contracts. For public business entities, the amendments in this ASU are effective for fiscal years beginning after December
15, 2022, including interim periods within those fiscal years. Early adoption of the amendments is permitted, including adoption in
an interim period. An entity that early adopts in an interim period should apply the amendments (1) retrospectively to all business
combinations for which the acquisition date occurs on or after the beginning of the fiscal year that includes the interim period of
early application and (2) prospectively to all business combinations that occur on or after the date of initial application.

The Company has taken then option to early adopt the amendments in this ASU for year ended December 31, 2021
and apply the amendments to interim periods from the beginning of the fiscal year. The Company has applied the amendments
of this ASU to the Merger with PRA, completed on July 1, 2021. The application of these amendments has resulted in a $16.0
million increase in goodwill and corresponding $16.0 million increase to unearned revenue compared to the initial accounting for
the Merger. Since July 1, 2021, the Company had amortized $4.0 million of the unearned revenue adjustment through the
revenue line in the Consolidated Statement of Comprehensive Income. This amortization has been reversed in December 2021
resulting in a net nil impact on revenue for the year ended December 31, 2021.

67Other accounting pronouncements

In August 2020, the FASB issued ASU 2020-06 ‘Accounting for Convertible Instruments and Contracts in an Entity’s
Own Equity’ which removes the separation models in ASC 470 ‘Debt’ for convertible debt with cash conversion features and
convertible instruments with beneficial conversion features. The ASU also removes from ASC 815 ‘Derivatives and Hedge
Accounting’ certain conditions for equity classification for contracts on an entity’s own equity. The ASU is effective for the
Company for the year ended December 31, 2021. The adoption of this ASU did not have a significant impact on the financial
statements.

In January 2020, the FASB issued ASU 2020-01, 'Investments-Equity Securities (Topic 321), Investments-Equity
Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)'. ASU 2020-01 states any equity security
transitioning from the alternative method of accounting under Topic 321 to the equity method, or vice versa, due to an observable
transaction will be re-measured immediately before the transition. In addition, the ASU clarifies the accounting for certain non-
derivative forward contracts or purchased call options to acquire equity securities stating such instruments will be measured
using the fair value principles of Topic 321 before settlement or exercise. The ASU is effective for the Company for the year
ended December 31, 2021, and has been applied on a prospective basis. The adoption of this ASU did not have a significant
impact on the financial statements.

In December 2019, the FASB issued ASU 2019-12 'Simplifying the Accounting for Income Taxes (Topic 740)'. The
amendments in this update simplify the accounting for income taxes by removing certain exceptions to the general principles in
Topic 740. The amendments also improve consistent application of GAAP for other areas of Topic 740 by clarifying and
amending existing guidance. The Company adopted the amendments in this ASU on a prospective basis, except where the
required method of adoption is retrospective or modified retrospective. ASU 2019-12 is effective for the Company for the year
ended December 31, 2021. The adoption of this ASU did not have a significant impact on the financial statements.

Impact of new accounting pronouncements which will be adopted during fiscal year ended December 31, 2022

No other new accounting pronouncement issued or effective has had, or is expected to have, a significant impact on the

Company’s consolidated financial statements.

Inflation

We believe that the effects of inflation generally do not have a material adverse impact on our operations or financial

conditions.

68Item 6. Directors, Senior Management and Employees.

A. Directors and Senior Management

The following table and accompanying biographies set forth certain information concerning each of ICON plc’s

Directors, officers and other key employees as of March 1, 2022.

Name

Age

Position

Ciaran Murray (5)

Dr. Steve Cutler (1)(6)

Brendan Brennan (1)(6)

Rónán Murphy (2)(3)(5)(6)

Professor Hugh Brady (3)

Dr. John Climax

Joan Garahy (2)(4)

Professor William Hall (2)(4)

Eugene McCague (3)(4)(5)

Julie O'Neill (5)

Mary Pendergast (2)

Colin Shannon

Dr. Linda Grais

Diarmaid Cunningham

Chair and Director

Chief Executive Officer and Director

Chief Financial Officer

Lead Independent Director

Director

Chief Administrative Officer, General Counsel & Company Secretary

(1) Named Executive Officer of the Company.
(2) Member of Compensation and Organization Committee.
(3) Member of Audit Committee.
(4) Member of Nominating and Governance Committee.
(5) Member of Integration Committee.
(6) Member of Execution Committee.

Ciaran Murray

Mr. Ciaran Murray graduated with a Bachelor of Commerce degree from University College Dublin in 1982. Mr. Murray
subsequently qualified as a chartered accountant with PwC. Following qualification, Mr. Murray gained extensive global
experience working as an executive in the fast moving consumer goods and technology sectors in Ireland, Italy, the UK and the
US. Mr. Murray has been the Chair of ICON plc since March 2017 and an outside director since the May 2018. Mr. Murray
served as Chief Executive Officer from October 2011 until March 2017 and was Chief Financial Officer from joining ICON plc in
2005 until his appointment as Chief Executive Officer in 2011. During his time with ICON plc, Mr. Murray was recognized for his
leadership of ICON and the CRO industry. Mr. Murray served as Chairman of the Association of Clinical Research Organizations
(ACRO) which represents the CRO industry globally. In addition, Mr. Murray was named as a leader in CRO Innovation by
PharmaVOICE100, a listing of the most influential people in the bio pharma industry. University College Dublin awarded Mr.
Murray an honorary degree of Doctor of Laws in 2013 for his support of third level research and innovation in Ireland. In 2018,
the Royal Dublin Society awarded Mr. Murray the RDS Gold Medal for Enterprise for making an exceptional impact on Irish
industry and commerce. Mr. Murray is also a member of the advisory Board of UCD Smurfit Business School.

Dr. Steve Cutler

Dr. Steve Cutler was appointed Chief Executive Officer of ICON plc in March 2017, having previously served as Chief
Operating Officer from January 2014. Dr. Cutler served as Group President of Clinical Research Services since November 2011
until his appointment as Chief Operating Officer. Dr. Cutler was appointed to the Board of ICON plc in November 2015. Prior to
joining the Company, Dr. Cutler held the position of Chief Executive Officer of Kendle, having previously served as Chief
Operating Officer. Prior to Kendle, Dr. Cutler spent 14 years with Quintiles where he served as Senior Vice President, Global
Project Management; Senior Vice President, Clinical, Medical and Regulatory; Senior Vice President, Project Management -
Europe; and Vice President, Oncology - Europe, as well as regional leadership positions in South Africa and Australia. Prior to
joining Quintiles, Dr. Cutler held positions with Sandoz (now Novartis) in Australia and Europe. Dr. Cutler holds a B.Sc. and a
Ph.D. from the University of Sydney and a Masters of Business Administration from the University of Birmingham (UK).

69
Brendan Brennan

Mr. Brendan Brennan has served as Chief Financial Officer since February 2012. Mr. Brennan has developed his career
over the last 22 years from experience in various industries. Mr. Brennan joined ICON in 2006 and he has served in a number of
senior finance roles in the Company including the role of Senior Vice President of Corporate Finance. Prior to this he developed
his broad financial experience in Cement Roadstone Holdings, a major Irish building materials organization. Mr. Brennan also
spent a number of years in public accounting with PwC. Mr. Brennan is a Fellow of the Institute of Chartered Accountants in
Ireland and holds a bachelor’s degree in Accounting and Finance from Dublin City University. Over his years in the CRO industry,
Mr. Brennan has been involved in many industry organizations and developments including ACRO (Association of Clinical
Research Organizations) where he was the founding Chairman of the industry CFO round table group, a group formed to aid
CROs dealing with the various industry challenges. Mr. Brennan held the position of Chairman of the round table from its
foundation in 2017 to December 31, 2019.

Rónán Murphy

Mr. Rónán Murphy has served as an outside Director of the Company since October 2016. He was appointed as Lead
Independent Director in January 2019. Mr. Murphy is the former Senior Partner of PwC Ireland. He was elected Senior Partner in
2007 and was re-elected for a further four year term in 2011. Following completion of the maximum two terms, Mr. Murphy retired
from the firm in 2015. Mr. Murphy was also a member of the PwC EMEA Leadership Board for a five year period from 2010 to
2015. Mr. Murphy joined PwC in 1980 and was admitted to the Partnership in 1992. Mr. Murphy is presently Chairman of
Greencoat Renewables PLC and a non-executive Director of Davy Stockbrokers. Mr. Murphy currently serves as a council
member of the ESRI and as Chair of Business in the Community Ireland. He is also a founding Board Member of the British Irish
Chamber of Commerce. Mr. Murphy completed a Bachelor of Commerce and Masters in Business Studies at University College
Dublin before qualifying as a chartered accountant in 1982.

Professor Hugh Brady

Professor Hugh Brady has served as an outside Director of the Company since April 2014. Professor Brady is a
physician-scientist. He is currently President and Vice-Chancellor of the University of Bristol in the UK - a member of the UK's
Russell Group of elite research-intensive universities. He is President Designate of Imperial College London, where he will serve
from August 1, 2022, and President Emeritus of University College Dublin (UCD), where he served as President from 2004-2013.
A nephrologist by training, Professor Brady served as Professor of Medicine and Therapeutics and Head of Department at UCD.
Prior to that, he built a successful career as a physician and biomedical research scientist in the US - spending almost a decade
at Harvard University where he was Associate Professor of Medicine, Director of the Renal Division of the Brockton/West
Roxbury VA Medical Center and Consultant Physician at the Brigham and Women’s Hospital, Boston. He has an international
reputation in the pathogenesis of diabetic kidney disease and renal inflammation. Professor Brady has held many national and
international leadership roles, including Chairman of the Irish Health Research Board and Chairman of the Universitas 21
Network of global research universities. He is also a non-executive Director of Kerry Group plc.

Dr. John Climax

Dr. John Climax, one of the Company’s co-founders, served as Chairman of the Board of the Company from November
2002 to December 2009 and as Chief Executive Officer from June 1990 to October 2002. Since January 2010 he has held a
position as an outside Director of the Company. Dr. Climax has over 30 years of experience in the clinical research industry. Dr.
Climax received his primary degree in pharmacy in 1977 from the University of Singapore, his masters in applied pharmacology
in 1979 from the University of Wales and his Ph.D. in pharmacology from the National University of Ireland in 1982. He has
authored a significant number of papers and presentations, and holds adjunct professorship at the Royal College of Surgeons of
Ireland and an honorary professorship at the National University of Singapore. He is currently Executive Chairman of DS
Biopharma and CEO of Afimmune, both of which are private companies.

Joan Garahy

Ms. Joan Garahy was appointed as an outside Director of ICON plc in November 2017. Ms. Garahy is a Non-Executive
Director of Irish Residential Properties REIT plc, IPB Insurance CLG and two private wealth management companies. Ms.
Garahy’s previous executive roles include founder and CEO of ClearView Investment & Pensions Limited, a financial advisory
company, Managing Director of HBCL Investment & Pensions Ltd, Director of Investments at HC Financial Services Group, Head
of Research at the Irish National Pension Reserve Fund, Head of Research at Hibernian Investment Managers and her equity
analyst roles with Goodbody Stockbrokers and NCB Group. Ms. Garahy was also previously Senior Independent non-executive
Director of Kerry Group plc and a non executive director at Galway University Foundation and she is currently a member of the
board of The Irish Chamber Orchestra. Ms. Garahy is a Qualified Financial Advisor, she holds a Bachelor of Science degree from
University College Galway, a Master of Science from University College Dublin and a Diploma in Accounting & Finance from
ACCA.

70Professor William Hall

Professor William Hall has served as an outside Director of ICON plc since February 2013. He is a renowned expert in
infectious diseases and virology. He currently serves as Distinguished Professor at Hokkaido University in Japan and is
Professor Emeritus of Medical Microbiology and the Centre for Research in Infectious Diseases at University College Dublin’s
(UCD) School of Medicine and Medical Science. Professor Hall also has served as Consultant to the Minister of Health and
Children in the Republic of Ireland, providing input on a range of topics including influenza pandemic preparedness, SARS, and
bioterrorism. Prior to his tenure at UCD, Professor Hall was Professor and Head of the Laboratory of Medical Virology, Senior
Physician and Director of the Clinical Research Centre at the Rockefeller University in New York. He previously served as an
Assistant and Associate Professor of Medicine at Cornell University and is also a co-founder of the Global Virus Network.

Eugene McCague

Mr. Eugene McCague was appointed as an outside Director of the Company in October 2017. Mr. McCague was a
corporate partner of Arthur Cox, one of Ireland’s premier law firms, from 1988 until June 2017. During his time with Arthur Cox,
Mr. McCague served as both managing partner and chairman of Arthur Cox and also advised a wide range of public and private
companies on mainstream corporate work, mergers and acquisitions, corporate restructurings and corporate governance. In
addition to his distinguished legal career, Mr. McCague also has extensive board experience with commercial, government and
educational organizations. Mr. McCague currently serves on the board of the Irish branch of AON Insurance and he also serves
as chairman of Ibec, Ireland’s leading business representative association. Mr. McCague’s previous board roles include the
Health Service Executive, the Irish state body which administers public health service in Ireland, chairman of the governing body
of the Dublin Institute of Technology, chairman of the Dublin Institute of Technology Foundation and chairman of the governing
authority of University College Dublin and director of Fly Leasing Limited. Mr. McCague was also president of the Dublin
Chamber of Commerce in 2006. Mr. McCague holds a Bachelor of Civil Law degree and a diploma in European Law from
University College Dublin.

Julie O’Neill

Ms. Julie O’Neill has served as an outside Director of ICON plc since July 2019. Ms. O’Neill was formerly Executive
Vice President, Global Operations of Alexion Pharmaceuticals, Inc., where she was responsible for global manufacturing
operations and expanding and improving supply chain and quality operations in the US, Europe, and Asia. Before joining Alexion,
Ms. O’Neill was Vice President of Operations and General Manager for Ireland at Gilead Sciences and earlier in her career, Ms.
O'Neill held leadership positions in operations, manufacturing and quality functions at Burnil Pharmacies and Helsinn Birex
Pharmaceuticals. Ms. O’Neill serves as a Board Member of DBV Technologies, Hookipa Pharma Inc.,ILC Dover, Achilles
Therapeutics plc and Angus Chemical Company. She is also on the board of Ireland’s National Institute for Bioprocessing
Research and Training. Ms. O’Neill holds a Bachelor of Science in Pharmacy from Trinity College Dublin, a Masters of Business
Administration from University College Dublin and is a Chartered Director of The Institute of Directors in Ireland. Ms. O'Neill is
also a member of the Strategy Committee of the State Claims Agency.

Mary Pendergast

Ms. Mary Pendergast has served as a non-executive director of ICON plc since February 2014. Ms. Pendergast is an
expert in the regulatory aspects of drug development and is President of Pendergast Consulting, a consulting firm that advises
biopharmaceutical companies, patient groups, professional and advocacy organizations, governments and academic and
financial institutions. Prior to founding her own firm, Ms. Pendergast was Executive Vice President of Government Affairs at Elan
Corporation plc from 1998 to 2003. Ms. Pendergast also spent more than 18 years at the US Food and Drug Administration
(FDA), serving as Deputy Commissioner and Senior Advisor to the FDA Commissioner and Associate Chief Counsel for
Enforcement.

71
Colin Shannon

Mr. Colin Shannon previously served as PRA's President and Chief Executive Officer and was a director of the
Company since 2010. He was also the Chairman of the Board of Directors at PRA Health Sciences. Mr. Shannon joined PRA in
2007, serving first as President and Chief Operating Officer. Prior to joining PRA Health Sciences, he was Executive Vice
President, Global Clinical Operations at Pharmaceutical Product Development, Inc. (now known as Pharmaceutical Product
Development LLC) or PPD. During his 12 year tenure with PPD, he held various leadership roles, including Chief Operating
Officer for its European division and Chief Financial and Administration Officer for Europe and the Pacific Rim. Prior to joining
PPD, Mr. Shannon had more than 15 years of experience in a variety of financial and accounting positions in the utility and
multimedia industries. Mr. Shannon earned his M.B.A. from London's City University and is a fellow member of the Chartered
Association of Certified Accountants.

Dr. Linda Grais

Dr. Linda Grais was previously a member of the PRA Health Sciences board since October 2015. Dr. Grais served as a
member of the board of directors of Ocera Therapeutics, Inc. from January 2008 through December 2017 and as President and
Chief Executive Officer of Ocera Therapeutics, Inc. from June 2012 to December 2017. Prior to her employment by Ocera, Dr.
Grais served as a managing member at InterWest Partners, a venture capital firm from May 2005 until February 2011. From July
1998 to July 2003, Dr. Grais was a founder and executive vice president of SGX Pharmaceuticals Inc., a drug discovery
company focusing on new treatments for cancer. Prior to that, she was a corporate attorney at Wilson Sonsini Goodrich & Rosati,
where she practiced in such areas as venture financings, public offerings and strategic partnerships. Before practicing law, Dr.
Grais worked as an assistant clinical professor of Internal Medicine and Critical Care at the University of California, San
Francisco. She currently serves on the boards of directors of Zosana Pharma Company and Arca Biopharma, Inc. and sits on the
compensation and audit committees of Arca Biopharma, Inc. Dr. Grais received a B.A. from Yale University, an M.D. from Yale
Medical School and a J.D. from Stanford Law School.

Diarmaid Cunningham

Mr. Diarmaid Cunningham is Chief Administrative Officer, General Counsel and Company Secretary. Mr. Cunningham
joined the Company as General Counsel in November 2009. From 2009 until 2013, Mr. Cunningham was based in the
Company’s global headquarters in Dublin. In 2013, Mr. Cunningham was seconded to the Company’s US headquarters in
Pennsylvania and that secondment ended in 2018 when Mr. Cunningham returned to Dublin. In July 2016, Mr. Cunningham’s
role expanded to include Chief Administrative Officer in addition to General Counsel. This expansion of his role means Mr.
Cunningham has responsibility to the Company’s Quality Assurance, Client Contracts Services, Facilities and Procurement
groups in addition to his responsibility for the Company’s Legal group. Mr. Cunningham graduated with a Bachelor of Business
and Legal Studies from University College Dublin in 1997, qualified as a lawyer in 2001 and completed the Stanford Executive
Program at Stanford University in California in 2015. Mr. Cunningham served as Secretary to the Board of the Association of
Clinical Research Organizations (ACRO) in 2013, 2014, 2020 and 2021. ACRO represents the CRO industry globally to key
stakeholders including pharmaceutical, biotech and medical device companies, regulators, legislators and patient groups. Prior
to joining the Company, Mr. Cunningham spent 10 years with A&L Goodbody, one of Ireland's premier corporate law firms. In
January 2021, Mr. Cunningham was appointed as a non-executive director of the Irish charity The Jack & Jill Foundation.

B. Compensation

Compensation Discussion & Analysis

Remuneration policy

The Compensation and Organization Committee seeks to achieve the following goals with the Company’s executive
compensation programs: to attract, motivate and retain key executives and to reward executives for value creation. The
Committee seeks to foster a performance-oriented environment by ensuring that a significant portion of each executive’s cash
and equity compensation is based on the achievement of performance targets that are important to the Company, its
shareholders and other stakeholders.

The Company’s executive compensation program has three main elements: base salary, a bonus plan and equity
incentives in the form of share related awards granted under the Company’s equity incentive plans. All elements of key
executives’ compensation are determined by the Compensation and Organization Committee based on the achievement of the
Group’s and individual performance objectives. Base salary, bonus awards and Directors’ fees were determined by the
Compensation and Organization Committee in U.S. dollars or euro.

72Outside Directors’ remuneration

Outside Directors are remunerated by way of Directors’ fees and are also eligible for participation in the share equity
incentive schemes. Up to July 1, 2021 each outside Director (excluding the Board Chairman) was paid an annual retainer of
$65,000 and additional fees for Board Committee service. With effect from July 1, 2021, the annual retainer was increased to
$90,000.

Mr. Murray’s Executive Chairman term expired on May 12, 2018 and he transitioned to the outside Director role of
Chair. Up to July 1, 2021, the arrangements with the Chair of the Board provided for payment of €300,000 (translated at average
rate for the year: $356,244) annually. With effect from July 1, 2021, the Chair fee was increased to €330,000 (translated at
average rate for the year: $392,244) annually.

Mr. Rónán Murphy was appointed as Lead Independent Director with effect from January 1, 2019 and receives an

additional annual fee of $25,000 for this role.

Outside Directors are not eligible for performance related bonuses and no pension contributions are made on their

behalf. The Compensation and Organization Committee sets outside Directors' remuneration.

Executive Directors’ and Key Executive Officers’ remuneration

Total cash compensation is divided into a base salary portion and a bonus incentive portion. The Committee targets
total cash compensation with regard to healthcare/biopharmaceutical companies of similar market capitalization and peer CRO
companies, adjusted upward or downward based on individual performance and experience and level of responsibility. The
Compensation and Organization Committee believes that the higher the executive’s level of responsibility within the Company,
the greater the percentage of the executive’s compensation that should be tied to the Company’s performance. Target bonus
incentive for executive officers range between 60% and 200% with actual pay outs for 2021 ranging from 60% to 200%, of salary,
based on Group and individual performance.

A total bonus of $3.2 million was awarded to the following individuals; Dr. Steve Cutler Chief Executive Officer ($2.3
million) and Mr. Brendan Brennan Chief Financial Officer ($0.9 million) to reflect their contribution to the performance of the
Company during 2021. These amounts were approved by the Compensation and Organization Committee and will be paid
during the year ended December 31, 2022.

The Company’s executives are eligible to receive equity incentives, including stock options, Restricted Share Units and
Performance Share Units, granted under the Company’s equity incentive plans. If executives receive equity incentive grants,
they are normally approved annually at the first scheduled meeting of the Committee in the fiscal year. The grant date and value
is determined by the Committee and the number of units granted is determined based on the closing price of the Company's
shares on the day of grant. Newly hired executives may receive sign-on grants. In addition, the Committee may, at its discretion,
issue additional equity incentive awards to executives if the Committee determines such awards are necessary to ensure
appropriate incentives are in place. The equity awards granted to each participant are determined primarily by the Committee at
the start of each year based on peer groups and advice from independent compensation consultants.

All executive officers are eligible to participate in applicable pension plans. The Company’s contributions are generally a
fixed percentage of their annual compensation, supplementing contributions by the executive. The Company has the discretion
to make additional contributions if deemed appropriate by the Committee. The Company’s contributions are determined at the
peer group median of comparable Irish companies and peer CRO companies. Contributions to this plan are recorded as an
expense in the Consolidated Statement of Operations.

Third party Agreements and Arrangements

ICON has not identified any arrangements or agreements relating to compensation or other payments provided by a
third party to ICON’s directors or director nominees in connection with their candidacy or board service as required to be
disclosed pursuant to NASDAQ Rule 5250(b)(3).

73Executive Compensation

Summary compensation table - Year ended December 31, 2021

Name & principal
position

Year

Salary

Bonus

Pension
contribution

All other
compens
ation

Subtotal

Share-
based
compens
ation

Director’s
Fees

Total
compens
ation

$’000

Dr. Steve Cutler
Chief Executive Officer

Brendan Brennan,
Chief Financial Officer

Total

2021 1,146 2,300

121

3,598

5,959

9,601

2021

607

914

2021 1,753 3,214

197

1,632

5,230

1,341

7,300

—
44

2,973

12,574

Summary compensation table - Year ended December 31, 2020

Name & principal
position

Year

Salary *

Bonus

Pension
contribution

All other
compens
ation

Subtotal

Share-
based
compens
ation

Director’s
Fees

Total
compens
ation

$’000

Dr. Steve Cutler
Chief Executive Officer

Brendan Brennan,
Chief Financial Officer

Total

2020 1,172

793

171

2,167

6,453

8,664

2020

562

253

2020 1,734 1,046

241

914

3,081

1,366

7,819

—
44

2,280

10,944

*Note: CEO salary is part of a bi-weekly payroll process. The 2020 payroll included an additional pay period compared to 2021.

Director Compensation
Summary compensation table - Year ended December 31, 2021

Name

Year

Salary

Company
pension
contribution

All other
compensa
tion

Subtotal

Share-
based
compensa
tion

Director’s
fees

Total
Compens
ation

Ciaran Murray

Steve Cutler

Rónán Murphy

Hugh Brady

John Climax

Joan Garahy

William Hall

Eugene McCague

Julie O'Neill

Mary Pendergast

Colin Shannon

Linda Grais

Total

2021

$’000

—

1,146

$’000

—

200

372

572

121

2,331

3,598

5,959

9,601

—

240

253

200

253

200

253

—

144

110

103

119

384

343

331

310

356

319

286

343

1,146

121

2,331

3,598

8,011

1,326

12,935

Summary compensation table - Year ended December 31, 2020

Name

Year

Salary *

Company
pension
contribution

All other
compensa
tion

Subtotal

Share-
based
compensa
tion

Director’s
fees

Total
Compens
ation

Ciaran Murray

Steve Cutler

Rónán Murphy

Hugh Brady

John Climax

Joan Garahy

William Hall

Eugene McCague

Julie O'Neill

Mary Pendergast

Total

2020

$’000

—

1,172

—

1,172

$’000

—

171

—

171

—

200

328

528

824

2,167

6,453

8,664

—

240

290

200

290

200

213

290

122

362

367

355

297

380

297

278

367

824

2,167

8,666

1,062

11,895

*Note: CEO salary is part of a bi-weekly payroll process. The 2020 payroll included an additional pay period compared to 2021.

Disclosure of Compensation Agreements

Employment Contracts, Termination of Employment and Change in Control Arrangements

The Company does not have any termination or change of control agreements with its named executive officers other
than as set out below and in the agreements relating to their equity incentives which provide for accelerated vesting on change of
control.

Directors’ and Executive Officers’ service agreements and letters of engagement

Mr. Ciaran Murray

Mr. Ciaran Murray has served as Chair of the Board of Directors since May 2018 having served as Executive Chairman
of the Board of Directors from March 2017 until May 2018. Mr. Murray served as Chief Executive Officer of the Company from
October 2011 until March 2017. Mr. Murray has served as a Director of the Company since September 2011. He previously
served as Chief Financial Officer of the Company from October 2005 until October 2011. Mr. Murray entered into an agreement
with the Company in respect of his role as Executive Chairman which was effective from March 2017. Mr. Murray’s Executive
Chairman term expired on May 12, 2018 and he transitioned to Chair. Up to July 1, 2021, the arrangements with the Chair of the
Board provided for the payment to him of fees of $356,244 (€300,000) per annum in respect of his position as Chair. With effect
from July 1, 2021, the Chair fee was increased to €330,000 (translated at average rate for the year: $392,244) annually. His
previous service agreement as Executive Chairman included termination provisions and also includes certain post-termination
clauses including non-disclosure, non-competition and non-solicitation provisions which still apply. As Chief Financial Officer,
Chief Executive and Executive Chairman, Mr. Murray was granted and held ordinary share options, Restricted Share Units and
Performance Share Units. The vesting of the ordinary share options and Restricted Share Units which were unvested on Mr.
Murray ceasing to be an ICON plc employee on May 12, 2018 were accelerated and the outstanding ordinary share options and
Restricted Share Units vested on that date. The unvested Performance Share Units with vesting dates between May 12, 2018
and March 2019 were forfeited on Mr. Murray ceasing to be an ICON plc employee on May 12, 2018. He was previously granted
and held at March 1, 2022 58,646 ordinary share options at exercise prices ranging from $71.95 to $125.74 per share and 865
Restricted Share Units, which vest in May 2022.

Dr. Steve Cutler

Dr. Steve Cutler has served as Chief Executive Officer since March 2017 having served as Chief Operating Officer of
the Company from January 2014 until March 2017. Prior to his appointment as Chief Operating Officer he served as Group
President Clinical Research Services since November 2011. He has served as an Executive Director of the Company since
November 2015. The Chief Executive Officer service agreement with Dr. Cutler is terminable on 12 months’ notice by either
party. Under the terms of this agreement Dr. Cutler is entitled to receive an annual salary of $1,146,127 and a bonus to be
agreed by the Compensation and Organization Committee. He is also entitled to receive a pension contribution, a car allowance
of $12,000 and medical insurance coverage for himself and his dependents. He was previously granted and held at March 1,
2022 173,016 ordinary share options at exercise prices ranging from $71.95 to $174.96 per share, 18,857 Restricted Share Units
which vest on various dates between March 2022 and March 2024 and 34,082 (up to a maximum of 68,164) Performance Share
Units which vest between March 2022 and March 2024 subject to the fulfillment of certain performance conditions. His Chief
Executive Officer service agreement requires him to devote his full time and attention to his duties for the Company excepting
certain outside director positions authorized by the Company. The agreement with Dr. Cutler includes termination and change of
control provisions and also includes certain post-termination clauses including non-disclosure, non-competition and non-
solicitation provisions. Dr. Cutler has a separate agreement with the Company in respect to his role as a director of ICON plc.
Under the terms of this agreement he is entitled to receive an annual fee of $44,000.

Mr. Brendan Brennan

Mr. Brendan Brennan has served as Chief Financial Officer since February 2012 having previously served as acting
Chief Financial Officer since October 2011. Prior to this appointment, he served in a number of senior finance roles in the
Company including the role of Senior Vice President of Corporate Finance. The service agreement with Mr. Brennan is
terminable on 12 months’ notice by either party. Under the terms of this agreement Mr. Brennan is entitled to receive an annual
salary of $607,035 (€510,922) and a bonus to be agreed by the Compensation and Organization Committee. He is also entitled
to receive a pension contribution, a car allowance of €20,000 and medical insurance coverage for himself and his dependents.
He was previously granted and held at March 1, 2022 64,215 ordinary share options at exercise prices ranging from $71.95 to
$174.96 per share, 4,261 Restricted Share Units, which vest on various dates between March 2022 and March 2024, and 7,600
(up to a maximum of 15,200) Performance Share Units which vest between March 2022 and March 2024 subject to the
fulfillment of certain performance conditions. His service agreement requires him to devote his full time and attention to his duties
for the Company excepting certain outside Director positions authorized by the Board. The agreement with Mr. Brennan includes
termination and change of control provisions and also includes certain post-termination clauses including non-disclosure, non-
competition and non-solicitation provisions.

Mr. Rónán Murphy

Mr. Rónán Murphy has served as Lead Independent Director from January 2019 having served as an outside Director
of the Company since October 2016. The current arrangements with Mr. Murphy provide for the payment to him of Directors fees
of $160,000 per annum. He was previously granted and held at March 1, 2022 9,622 ordinary share options at an exercise prices
ranging from $90.03 to $125.74 and 865 Restricted Share Units, which vest in May 2022.

Professor Hugh Brady

Professor Hugh Brady has served as an outside Director of the Company since April 2014. The current arrangements
with Professor Brady provide for the payment to him of Directors fees of $102,500 per annum. He was previously granted and
held at March 1, 2022 5,192 ordinary share options at exercise prices ranging from $65.60 to $90.03 and 865 Restricted Share
Units, which vest in May 2022.

Dr. John Climax

Dr. John Climax, one of the Company’s co-founders, served as Chairman of the Board of the Company from November
2002 to December 2009. He also served as Chief Executive Officer of the Company from June 1990 to October 2002 and is
currently an outside Director of the Company. The current arrangements with Dr. Climax provide for the payment to him of
Directors fees of $90,000 per annum. He was previously granted and held at March 1, 2022 43,255 ordinary share options at
exercise prices ranging from $40.83 to $125.74 per share and 865 Restricted Share Units, which vest in May 2022.

Ms. Joan Garahy

Ms. Joan Garahy has served as an outside Director of the Company since November 2017. The current arrangements
with Ms. Garahy provide for the payment to her of Directors fees of $122,500 per annum. She was previously granted and held
at March 1, 2022 5,005 ordinary share options at an exercise price of $125.74 and 865 Restricted Share Units, which vest in May
2022.

76Professor William Hall

Professor William Hall has served as an outside Director of the Company since February 2013. The current
arrangements with Professor Hall provide for the payment to him of Directors fees of $115,000 per annum. He was previously
granted and held at March 1, 2022 1,541 ordinary share options at exercise price of $90.03 and 865 Restricted Share Units,
which vest in May 2022.

Mr. Eugene McCague

Mr. Eugene McCague has served as an outside Director of the Company since October 2017. The current
arrangements with Mr. McCague provide for the payment to him of Directors fees of $135,000 per annum. He was previously
granted and held at March 1, 2022 5,005 ordinary share options at an exercise price of $125.74 and 865 Restricted Share Units,
which vest in May 2022.

Ms. Julie O'Neill

Ms. Julie O'Neill was appointed an outside Director of the Company in July 2019. The current arrangements with Ms.
O'Neill provide for the payment to her of Directors fees of $102,500 per annum. She was previously granted and held at March 1,
2022 865 Restricted Share Units, which vest in May 2022.

Ms. Mary Pendergast

Ms. Mary Pendergast has served as an outside Director of the Company since February 2014. The current
arrangements with Ms. Pendergast provide for the payment to her of Directors fees of $102,500 per annum. She was previously
granted and held at March 1, 2022 43,255 ordinary share options at exercise prices ranging from $40.83 to $125.74 and 865
Restricted Share Units, which vest in May 2022.

Mr. Colin Shannon

Mr. Colin Shannon has served as an outside Director of the Company since July 2021 having served as PRA Health
Sciences, Inc. President and Chief Executive Officer and was a director of from 2010 to July 2021. He was also the Chairman of
the Board of Directors at PRA Health Sciences. The current arrangements with Mr. Shannon provide for the payment to him of
Directors fees of $90,000 per annum.

Dr. Linda Grais

Dr. Linda Grais has served as an outside Director of the Company since July 2021 having served as a member of the
PRA Health Sciences, Inc. board since October 2015. The current arrangements with Dr. Grais provide for the payment to her of
Director fees of $90,000 per annum.

77C. Board Practices

Board of Directors

The business of the Company is managed by the Directors who may exercise all the powers of the Company which are
not required by the Companies Act 2014 of Ireland or by the Constitution of the Company to be exercised by the Company in
general meeting. A meeting of Directors, at which a quorum is present, may exercise all powers exercisable by the Directors.
The Directors may delegate (with power to sub-delegate) to any Director holding any executive office and to any Committee
consisting of one or more Directors, together with such other persons as may be appointed to such Committee by the Directors,
provided that a majority of the members of each Committee appointed by the Directors shall at all times consist of Directors and
that no resolution of any such Committee shall be effective unless two of the members of the Committee present at the meeting
at which it was passed are Directors.

The Board comprises one executive and eleven outside Directors at the date of this report. The outside Directors bring
independent judgment to bear on issues of strategy, performance, resources, key appointments and standards. The Company
considers all of its outside Directors to be of complementary skills, experience and knowledge and each outside Director has
specific skills, experience and knowledge that are valuable to the Company. The Board members between them have strong
financial, pharmaceutical, CRO, scientific, medical and other skills and knowledge which are harnessed to address the
challenges facing the Group. The Board meets regularly throughout the year and all Directors have full and timely access to the
information necessary for them to discharge their duties. The Directors have access to the advice and services of the Company
Secretary and may seek external independent professional advice where required. The Board considers its current size (12
Directors) to be adequate but continues to look for suitable qualified potential candidates to join the Board.

As set out below, certain other matters are delegated to Board Committees and all Board Committees report to the
Board. The Company maintains what it considers an appropriate level of insurance cover in respect of legal action against its
Directors. The Board, through the Nominating and Governance Committee, engages in succession planning for the Board and in
so doing considers the strength and depth of the Board and the levels of knowledge, skills and experience of the Directors
necessary for the Company to achieve its objectives. The Board meets at least four times each year. During the year ended
December 31, 2021 the Board held nine board meetings. During 2021, in response to the global pandemic, those meetings were
held both virtually and in-person depending on government guidelines at the time of the meetings. All Directors allocated
sufficient time to the Company during the year ended December 31, 2021 to effectively discharge their responsibilities to the
Company.

Directors’ retirement and re-election

The Company’s Constitution provides that, unless otherwise determined by the Company at a general meeting, the
number of Directors shall not be more than 15 nor less than 3. At each annual general meeting, one third of the Directors who
are subject to retirement by rotation, rounded down to the next whole number if it is a fractional number, shall retire from office.
The Directors to retire shall be those who have been longest in office, but as between persons who became or were last re-
appointed on the same day, those to retire shall be determined, unless otherwise agreed, by lot. Any additional Director
appointed by the Company shall hold office until the next annual general meeting and will be subject to re-election at that
meeting. Accordingly, at the annual general meeting of the Company to be held in 2022, it is anticipated that 4 Directors will retire
in accordance with the Constitution and offer themselves for re-election. The Board of Directors adopted a Non-Executive
Director Policy for Service on April 24, 2018, the Policy was amended on April 21, 2020 which provides that, subject to individual
waiver by the Board, an outside Director of ICON plc shall serve on the Board of the Directors for an initial term which expires at
the fourth annual general meeting after their appointment. Each outside director may serve a further term of 3 years, subject to
the Board’s approval. After the second 3 year term the Board may request that the outside Director serve up to 3 further terms of
1 year each. After a third 1 year term the Board may request that the outside director serve for further 1 year terms in the event
that the Board has particular requirement or desire for the outside director’s skill, knowledge or experience. For an outside
Director who previously served as an executive of the Company, the initial 3 year term referred to in this policy is deemed to
commence on the date that he/she is determined to be independent as per the NASDAQ Rules. This policy does not apply to Dr.
John Climax as he is a founder of the Company.

Lead Independent Director

The Board of Directors adopted a Lead Independent Director Charter on February 14, 2017 which provides that in
circumstances where the Chairman of the Board is not independent, the independent members of the Board of Directors shall
appoint, from among their number, a Lead Independent Director. The Lead Independent Director shall generally assist in
optimizing the effectiveness and independence of the Board of Directors by performing such duties as described in the charter,
on behalf of the Board of Directors, including coordinating the meetings of the other non-employee and independent directors,
and such other duties as determined from time to time by the Board of Directors and/or its independent members. Mr. Rónán
Murphy was appointed as Lead Independent Director with effect from January 1, 2019.

78Board Committees

The Board has delegated some of its responsibilities to Board Committees. There are currently five Committees. These
are the Audit Committee, the Compensation and Organization Committee, the Nominating and Governance Committee,
Integration Committee and the Execution Committee. Each Committee has been charged with specific responsibilities and each
has written terms of reference that are reviewed periodically. Minutes of Committee meetings are available to all members of the
Board. The Company Secretary is available to act as secretary to each of the Board Committees if required. Appropriate key
executives are regularly invited to attend meetings of the Board Committees. The Audit Committee, Compensation and
Organization Committee and Nominating and Governance Committee each completed a self-evaluation of the performance of
the Committee during the year ended December 31, 2021 or in respect to the year ended December 31, 2021 and each
Committee was satisfied with their performance.

Audit Committee

The Audit Committee meets a minimum of four times a year. It reviews the quarterly and annual financial statements,
the effectiveness of the system of internal control and recommends the appointment and removal of the external auditors. It
monitors the adequacy of internal accounting practices and addresses all issues raised and recommendations made by the
external auditors. The Audit Committee pre-approves all audit and non-audit services provided to the Company by its external
auditors on a quarterly basis. The Audit Committee, on a case by case basis, may approve additional services not covered by the
quarterly pre-approval, as the need for such services arises. The Audit Committee reviews all services which are provided by the
external auditor to review the independence and objectivity of the external auditor, taking into consideration relevant professional
and regulatory requirements. The Chief Financial Officer, the Head of Internal Audit, the General Counsel and the external
auditors normally attend all meetings of the Audit Committee and have direct access to the Committee Chairperson at all times.
The Audit Committee is currently comprised of three independent Directors: Rónán Murphy (Chairperson), Professor Hugh Brady
and Eugene McCague.

Compensation and Organization Committee

The Compensation and Organization Committee is responsible for senior executive remuneration. The Committee aims
to ensure that remuneration packages are competitive so that individuals are appropriately rewarded relative to their
responsibility, experience and value to the Company. Annual bonuses for the executive Directors and senior executive
management are determined by the Committee based on the achievement of the Company’s objectives. The Committee also
oversees succession planning for the Company’s senior management. The Compensation and Organization Committee is
currently comprised of the following independent Directors: Joan Garahy (Chairperson), Professor William Hall, Mary
Pendergast and Rónán Murphy.

Nominating and Governance Committee

The Nominating and Governance Committee is responsible for Board succession, oversight of the Board and committee
composition and performance and oversight of the Company's corporate governance and business ethics initiatives and
strategies and activities in respect to environmental, social and governance (ESG) matters. The Committee reviews the
membership of the Board of the Company and Board Committees on an ongoing basis. As part of this, it regularly evaluates the
balance of skills, knowledge and experience on the Board and then, based on this evaluation, identifies and, if appropriate,
recommends individuals to join the Board of the Company. The Committee uses external search consultants as needed to assist
it in identifying potential new outside Directors. Once potential suitable candidates are identified either by the external search
consultants or by members of the Nominating and Governance Committee, the Committee then discusses and considers the
skills, knowledge and experience of the potential candidate. The Committee will assess if the Board of the Company requires
and would benefit from the potential candidate’s skills, knowledge and experience and, if it decides the potential candidate is
suitable, the Committee would recommend to the Board of the Company that the potential candidate be appointed. The Board of
the Company then decides whether or not to appoint the candidate. The Committee considers diversity of the Board members
when making recommendations to the Board of the Company. The Committee Charter was updated in February 2022 to include
specific responsibilities in respect to the oversight of the Company's strategic plans, objectives and risks relating to ESG matters.
The Nominating and Governance Committee currently comprises the following independent Directors: Eugene McCague
(Chairperson), Professor William Hall and Joan Garahy.

Integration Committee

The Integration Committee was set up in April 2021 to assist the Board with its oversight responsibilities in relation to
the integration of PRA Health Sciences into the ICON Group. The Integration Committee will meet a minimum of four times a
year. It is responsible for the reviewing and assessing the integration plan and providing oversight of the integration team
including reviewing the progress of the integration and recommending to the Board for approval any changes to the plans,
documents, policies and procedures of the integration team. The Committee is also responsible for meeting the external advisors
for the integration. The Integration Committee currently comprises the following independent Directors: Ciaran Murray
(Chairperson), Rónán Murphy, Eugene McCague and Julie O'Neill.

79Execution Committee

The primary function of the Execution Committee is to exercise the powers and authority of the Board in intervals
between meetings of the Board within the limits set out in the Charter of the Execution Committee. The Execution Committee
exercises business judgment to act in what the Committee members reasonably believe to be in the best interest of the
Company and its shareholders. All powers exercised by the Execution Committee are ratified at board meetings. This Committee
convenes as often as it determines to be necessary or appropriate. The Execution Committee is currently comprised of the
following Directors and Officers: Steve Cutler (Chairperson), Rónán Murphy and Brendan Brennan.

Attendance at Board and Committee meetings

Attendance at Board and Committee meetings by the Directors who held office during 2021 are set out as follows:

Directors’ Attendance Table

Board

Audit

Compensation
and
Organization

Nominating
and
Governance

Integration (3)

Director

Ciaran Murray (1)

Dr. Steve Cutler

Rónán Murphy (1)

Prof. Hugh Brady (1)

Dr. John Climax (1)

Joan Garahy (1)

Prof. William Hall (1)

Eugene McCague (1)

Julie O'Neill (1)

Mary Pendergast (1)

Colin Shannon

Dr. Linda Grais (1)

Number of meetings attended / number of meetings eligible to attend as a Director

9/9

8/9

9/9

8/9

9/9

3/3

—

4/4

—

4/4

—

6/6

—

6/6

—

6/6

—

4/4

—

3/3

—

3/3

—

3/3

—

(1)

Independent Director as defined under NASDAQ Rule 5605(a)(2). Ciaran Murray is an independent director in

accordance with NASDAQ Rule 5605(a)(2) since May 2021.

(2) All decisions by the Execution Committee were made by written resolution and therefore no meetings were held.

(3) The Integration Committee was set up in April 2021 and held 3 meetings from that period to year end, it will hold a

minimum of 4 meetings in a full year.

D. Employees

At December 31, 2021, December 31, 2020 and December 31, 2019 we employed approximately 38,330, 15,730 and
14,650 people respectively. Our employees are not unionized and we believe we have a satisfactory relationship with our
employees.

E. Share Ownership

The following table sets forth certain information as of March 1, 2022 regarding beneficial ownership of our ordinary
shares by all of our current Directors and executive officers. Unless otherwise indicated below, to our knowledge, all persons
listed below have sole voting and investment power with respect to their ordinary shares, except to the extent authority is shared
by spouses under applicable law.

Name of Owner or
Identity of Group

Mr. Ciaran Murray

Dr. Steve Cutler

Mr. Brendan Brennan

Mr. Rónán Murphy

Professor Hugh Brady

Dr. John Climax

Ms. Joan Garahy

Professor William Hall

Mr. Eugene McCague

Ms. Julie O'Neill

Ms. Mary Pendergast

Mr. Colin Shannon

Dr. Linda Grais

No. of
Shares (1)

% of total
Shares

1,274

24,640

21,621

1,274

589

—

0.03 %

—

508,891

0.62 %

1,274

—

1,274

1,084

1,380

—

3,994

—

(1) As used in these tables, each person has the sole or shared power to vote or direct the voting of a security, or the sole or
shared investment power with respect to a security (i.e. the power to dispose, or direct the disposition, of a security). A
person is deemed as of any date to have "beneficial ownership" of any security if that such person has the right to acquire
such security within 60 days after such date.

Restricted Share Units and Performance Share Units

The following table sets forth certain information as of March 1, 2022 regarding beneficial ownership of Restricted Share

Units (“RSUs”) and Performance Share Units (“PSUs”) which have been issued to our current Directors and executive officers.

No. of
PSUs (1)

Vesting Date

12,526

11,202

10,354

March 3, 2022

March 3, 2023

March 3, 2024

2,731

2,425

2,444

March 3, 2022

March 3, 2023

March 3, 2024

Name of Owner or
Identity of Group

Mr. Ciaran Murray

Dr. Steve Cutler

Mr. Brendan Brennan

Mr. Rónán Murphy

Professor Hugh Brady

Dr. John Climax

Ms. Joan Garahy

Professor William Hall

Mr. Eugene McCague

Ms. Julie O'Neill

Ms. Mary Pendergast

No. of
RSUs

865

3,581

3,200

2,958

3,201

2,959

781

692

698

694

698

865

Vesting Date

May 21, 2022

March 3, 2022

March 3, 2023

March 3, 2024

March 3, 2022

March 3, 2023

March 3, 2024

May 21, 2022

(1) Of the issued PSUs, performance conditions will determine how many vest. If performance targets are exceeded,
additional PSUs will be issued and will vest in accordance with the terms of the relevant PSU award. The PSUs vest
based on service and specified EPS targets over the periods 2019 – 2021, 2020 – 2022 and 2021 – 2023. Depending on
the actual amount of EPS from 2019 to 2023, up to a maximum of 41,682 additional PSUs may also be granted to Dr.
Steve Cutler and Mr. Brendan Brennan.

Share Options

The following table sets forth certain information as of March 1, 2022 regarding options to acquire ordinary shares of the

Company by all of our current Directors and executive officers.

Name of Owner or
Identity of Group

Mr. Ciaran Murray

Dr. Steve Cutler

Mr. Brendan Brennan

Mr. Rónán Murphy

Professor Hugh Brady

Dr. John Climax

Ms. Joan Garahy

Professor William Hall

Mr. Eugene McCague

Ms. Mary Pendergast

No. of
Options (1)

Exercise price Expiration Date

45,948

7,693

5,005

6,128

25,156

29,613

32,272

42,386

37,461

13,611

14,206

9,584

8,796

9,176

8,842

4,617

5,005

2,113

3,079

10,000

10,557

7,693

5,005

1,541

5,005

10,000

10,557

7,693

5,005

$71.95 March 4, 2024

$90.03 May 19, 2025

$125.74 May 18, 2026

$71.95 March 4, 2024

$83.47 March 3, 2025

$115.11 March 3, 2026

$140.38 March 3, 2027

$159.33 March 3, 2028

$174.96 March 3, 2029

$71.95 March 4, 2024

$83.47 March 3, 2025

$115.11 March 3, 2026

$140.38 March 3, 2027

$159.33 March 3, 2028

$174.96 March 3, 2029

$90.03 May 19, 2025

$125.74 May 18, 2026

$65.60 May 20, 2024

$90.03 May 19, 2025

$40.83 May 23, 2022

$68.39 March 18, 2023

$65.60 May 20, 2024

$90.03 May 19, 2025

$125.74 May 18, 2026

$90.03 May 19, 2025

$125.74 May 18, 2026

$40.83 May 23, 2022

$68.39 March 18, 2023

$65.60 May 20, 2024

$90.03 May 19, 2025

$125.74 May 18, 2026

(1) The title of securities covered by all of the above options are non-qualified.

In February 2018, the Board approved the appointment of Mr. Murray as Chair of the Board of Directors with effect from
May 12, 2018. Mr. Murray ceased to be an employee of the Company as of this date. Mr. Murray was granted and held ordinary
share options, Restricted Share Units and Performance Share Units as Chief Financial Officer, Chief Executive Officer and
Executive Chairman. The vesting of the ordinary share options and Restricted Share Units which were unvested on Mr. Murray
ceasing to be an ICON plc employee (May 12, 2018) were accelerated and the outstanding ordinary share options and
Restricted Share Units vested on that date. The unvested Performance Share Units with vesting dates between May 12, 2018
and March 2019 were forfeited on Mr. Murray ceasing to be an ICON plc employee on May 12, 2018.

Equity Incentive Plans

On April 30 2019, the Company approved the 2019 Consultants and Directors Restricted Share Unit Plan (the “2019
Consultants RSU Plan”), which was effective as of May 16, 2019, pursuant to which the Compensation and Organization
Committee of the Company’s Board of Directors may select any consultant, adviser or Non-Executive Director retained by the
Company, or a Subsidiary to receive an award under the plan. 250,000 ordinary shares have been reserved for issuance under
the 2019 Consultants RSU Plan. The awards are at par value and vest over a service period. Awards granted to Non-Executive
Directors during 2020 and 2021 vest over twelve months.

On April 23, 2013 the Company adopted the 2013 Employees Restricted Share Unit and Performance Share Unit Plan
(the “2013 RSU Plan”) pursuant to which the Compensation and Organization Committee of the Company’s Board of Directors
may select any employee, or any Director holding a salaried office or employment with the Company, or a Subsidiary to receive
an award under the plan. On May 11, 2015, the 2013 RSU Plan was amended and restated in order to increase the number of
ordinary shares that can be issued under the RSU Plan by 2.5 million shares. Accordingly, an aggregate of 4.1 million ordinary
shares have been reserved for issuance under the 2013 RSU Plan. The shares are awarded at par value and vest over a service
period. Awards under the 2013 RSU Plan may be settled in cash or shares at the option of the Company.

On July 21, 2008 the Company adopted the Employee Share Option Plan 2008 (the “2008 Employee Plan”) pursuant to
which the Compensation and Organization Committee of the Company’s Board of Directors may grant options to any employee,
or any Director holding a salaried office or employment with the Company or a Subsidiary for the purchase of ordinary shares.
On the same date, the Company also adopted the Consultants Share Option Plan 2008 (the “2008 Consultants Plan”), pursuant
to which the Compensation and Organization Committee of the Company’s Board of Directors may grant options to any
consultant, adviser or Non-Executive Director retained by the Company or any Subsidiary for the purchase of ordinary shares.

On February 14, 2017 both the 2008 Employee Plan and the 2008 Consultants Plan (together the “2008 Option Plans”)
were amended and restated in order to increase the number of options that can be issued under the 2008 Consultants Plan from
0.4 million to 1.0 million and to extend the date for options to be granted under the 2008 Option Plans. An aggregate of 6.0
million ordinary shares have been reserved under the 2008 Employee Plan as reduced by any shares issued or to be issued
pursuant to options granted under the 2008 Consultants Plan under which a limit of 1.0 million shares applies. Further, the
maximum number of ordinary shares with respect to which options may be granted under the 2008 Employee Option Plan,
during any calendar year to any employee shall be 0.4 million ordinary shares. There is no individual limit under the 2008
Consultants Plan. No options may be granted under the 2008 Option Plans after February 14, 2027.

Each option granted under the 2008 Option Plans will be a nonqualified stock option, or NSO and not an incentive stock
option as described in Section 422 of the Internal Revenue Code. Each grant of an option under the 2008 Options Plans will be
evidenced by a Stock Option Agreement between the optionee and the Company. The exercise price will be specified in each
Stock Option Agreement, however, option prices will not be less than 100% of the fair market value of an ordinary share on the
date the option is granted.

On January 17, 2003 the Company adopted the Share Option Plan 2003 (the “2003 Share Option Plan”) pursuant to
which the Compensation and Organization Committee of the Board could grant options to officers and other employees of the
Company or its subsidiaries for the purchase of ordinary shares. An aggregate of 6.0 million ordinary shares were reserved
under the 2003 Share Option Plan; and, in no event could the number of ordinary shares issued pursuant to options awarded
under this plan exceed 10% of the outstanding shares, as defined in the 2003 Share Option Plan, at the time of the grant, unless
the Board expressly determined otherwise. Further, the maximum number of ordinary shares with respect to which options could
be granted under the 2003 Share Option Plan during any calendar year to any employee was 0.4 million ordinary shares. The
2003 Share Option Plan expired on January 17, 2013. No new options may be granted under this plan.

Share option awards are granted with an exercise price equal to the market price of the Company’s shares at date of
grant. Share options typically vest over a period of five years from date of grant and expire eight years from date of grant. Share
options granted to Non-Executive Directors during 2018 vest over 12 months and expire eight years from the date of grant.

Legacy PRA Equity Incentive Plans

The following represent the legacy PRA equity incentive plans, which still have equity outstanding but have been

terminated as of July 1, 2021, as to grants of future awards.

Pursuant to the Merger Agreement, effective on July 1, 2021, each outstanding stock option and restricted stock unit
under the PRA Plans was assumed by the Company and converted into a stock option or Restricted Share Unit exercisable for
or payable in Ordinary Shares based on the ratio of the average trading price per Ordinary Share for the ten days prior to July 1,
2021, and the corresponding value of the merger consideration for each PRA Share. Accordingly, the plans as detailed below
were assumed by the Company.

PRA Health Sciences, Inc. 2020 Stock Incentive Plan was amended and restated and assumed by the Company
effective as of July 1, 2021. The 2020 Stock Incentive Plan (“the 2020 Plan”), was approved by the PRA stockholders at their
annual meeting on May 18, 2020. The 2020 Plan allowed for the issuance of stock options, stock appreciation rights, restricted
shares and restricted stock units, other stock-based awards, and performance compensation awards as permitted by applicable
laws. The 2020 Plan authorized the issuance of 2,500,000 shares of common stock plus all shares that remained available under
the prior plan on May 18, 2020.

The PRA Health Sciences, Inc. 2018 Stock Incentive Plan was amended and restated and assumed by the Company
effective as of July 1, 2021. The 2018 Stock Incentive Plan (the “2018 Plan”), was approved by the PRA stockholders at their
annual meeting on May 31, 2018. The 2018 Plan allowed for the issuance of stock options, stock appreciation rights, restricted
shares and restricted stock units, other stock-based awards, and performance compensation awards as permitted by applicable
laws. The 2018 Plan authorized the issuance of 2,000,000 shares of common stock plus all shares that remained available under
the 2014 Plan on May 31, 2018 (which included shares carried over from the 2013 Plan).

The PRA Health Sciences, Inc. 2014 Omnibus Incentive Plan was amended and restated and assumed by the
Company effective as of July 1, 2021 (the “2014 Plan”). On November 23, 2014, the PRA Health Sciences, Inc. Board of
Directors approved the formation of the 2014 Plan for Key PRA Employees. The 2014 Plan allowed for the issuance of stock
options, stock appreciation rights, restricted shares and restricted stock units, other stock-based awards, and performance
compensation awards as permitted by applicable laws.

The 2013 Stock Incentive Plan for Key Employees of PRA Health Sciences and its Subsidiaries was amended and
restated and assumed by the Registrant effective as of July 1, 2021 (the “2013 Plan”). On September 23, 2013, the PRA Health
Sciences, Inc. Board of Directors approved the formation of the 2013 Plan for Key Employees of Pinnacle Holdco Parent, Inc.
and its subsidiaries. The 2013 Plan allowed for the issuance of stock options and other stock-based awards as permitted by
applicable laws. The number of shares available for grant under the 2013 Plan was 12.5% of the outstanding shares at closing
on a fully diluted basis. The 2013 Plan authorized the issuance of 2,052,909 shares of common stock.

Item 7. Major Shareholders and Related Party Transactions.

A. Major Shareholders

The following table sets forth certain information regarding beneficial ownership of ICON's ordinary shares as of
March 1, 2022 (i) by each person that beneficially owns more than 5% of the outstanding ordinary shares, based upon
information known to us and publicly available information; and (ii) by all of our current Directors, officers and other key
employees as a group. Unless otherwise indicated below, to our knowledge, all persons listed below have sole voting and
investment power with respect to their ordinary shares, except to the extent authority is shared by spouses under applicable law.
None of the persons listed below have voting rights that differ from any other person listed below.

Name of Owner or Identity of Group

No. of
Shares (1)

Percent
of Class

No. of
Shares (1)

Percent
of Class

No. of
Shares (1)

Percent
of Class

2021

2020 (4)

2019 (5)

WCM Investment Management (2)

7,179,979

8.8 %

3,976,550

7.5 %

3,643,211

6.8 %

MFS Investment Management (2)

6,785,703

8.3 %

2,073,465

3.9 %

1,489,310

2.8 %

Wellington Management Company, LLP (2)

5,154,597

6.3 %

3,989,007

7.6 %

3,800,959

7.1 %

All Directors, officers and other key employees
as a group (3)

1,129,726

1.4 %

1,152,168

2.2 %

1,278,374

2.4 %

(1) As used in this table, each person has the sole or shared power to vote or direct the voting of a security, or the sole or
shared investment power with respect to a security (i.e., the power to dispose, or direct the disposition, of a security). A
person is deemed as of any date to have "beneficial ownership" of any security if that such person has the right to acquire
such security within 60 days after such date.

(2) Neither the Company nor any of its officers, Directors or affiliates holds any voting power in this entity.

(3)

Includes 430,451 ordinary shares issuable upon the exercise of stock options granted by the Company, 33,568 RSUs
awarded by the Company to Directors, officers and other key employees and 92,866 PSUs awarded by the Company to
Directors, officers and other key employees. Of the PSUs, performance conditions determine how many of them will vest
and, if performance targets are exceeded, additional PSUs will be issued and vest in accordance with the terms of the
relevant PSU award, the figure included is the maximum amount of PSUs that may be issued.

(4) Amounts shown above are stated as of February 24, 2021.

(5) Amounts shown above are stated as of February 27, 2020.

ICON plc, is not directly or indirectly, owned or controlled by another corporation or by any government.

B. Related Party Transactions

Subsidiaries of the Company earned revenue of $30,000 (December 31, 2020: $321,000) from DS Biopharma Limited
(formerly Dignity Sciences Limited) during the year. Dr. John Climax is Executive Chairman and a Director and shareholder of DS
Biopharma Limited. $12,000 was recorded as due from DS Biopharma Limited at December 31, 2021 (December 31, 2020:
$41,000).

Subsidiaries of the Company earned revenue of $551,000 (December 31, 2020: $9,000) from Afimmune Limited during
the year. Dr. John Climax is Chief Executive Officer and a Director and shareholder of Afimmune Limited. $197,000 was recorded
as due from Afimmune Limited at December 31, 2021 (December 31, 2020: $Nil).

On July 24, 2020, a subsidiary of the Company, ICON Clinical Research Limited, entered into an agreement to jointly
establish a new company, Oncacare, with a third party. The Company has invested $4.9 million to obtain a 49% interest in the
voting share capital of Oncacare. The Company provided corporate support services to Oncacare to the value of $465,000
during the year ended December 31, 2021. $264,000 was recorded as due from Oncacare at December 31, 2021. During the
year ended December 31, 2021, the Company provided a loan of $10 million to Oncacare in order to fund the continued start up
of the business' operations. The loan accrues annual interest at 1.6% and the loan is repayable on June 30, 2025. The full
amount of this loan remains outstanding at December 31, 2021 along with accrued interest of $23,000.

The majority investor in Oncacare has the right to sell the 51% majority voting share capital exclusively to the Company
in an eighteen month period, commencing January 1, 2023 and ICON also has the right to acquire the 51% majority voting share
capital from August 1, 2025.

C. Interests of experts and counsel

Not applicable

Item 8. Financial Information.

A. Consolidated Statements and Other Financial Information

See Item 18.

Legal Proceedings

We do not expect any litigation to have a materially adverse effect on our financial condition or results of operations.
However, from time to time, we may become involved in various lawsuits and legal proceedings which arise in the ordinary
course of business. Litigation is subject to inherent uncertainties, and an adverse result in these or other matters may arise from
time to time that may harm our business.

86
Dividend Policy

We have not paid cash dividends on our ordinary shares and do not currently intend to pay cash dividends on our

ordinary shares in the foreseeable future.

B. Significant Changes

There have been no significant changes to our business that we believe could reasonably be expected to have a

material adverse effect on our business, results of operations and financial condition.

Item 9. The Offer and Listing.

A. Offer and listing details

ICON’s ordinary shares are traded on the NASDAQ Global Select Market under the symbol “ICLR”. ICON plc’s
American Depositary Receipt ("ADR") program was terminated on January 31, 2013 and ICON plc’s ordinary shares began
directly trading on NASDAQ on February 4, 2013. Prior to that date, ICON plc’s American Depositary Shares ("ADSs") were
traded on NASDAQ and ICON plc’s Depository for the ADSs was The Bank of New York Mellon.

B. Plan of distribution
Not applicable.

C. Markets

NASDAQ.

D. Selling shareholders

Not applicable.

E. Dilution

Not applicable.

F. Expenses of the issue

Not applicable.

Item 10. Additional Information.

A. Share Capital

Not applicable.

B. Memorandum and articles of association

Constitution
We hereby incorporate by reference our Constitution, as amended, located under the heading “Constitution of the

Company” in Exhibit 3.1.

The following is a summary of certain provisions of the current Constitution of the Company. This summary does not
purport to be complete and is qualified in its entirety by reference to the complete text of the Constitution of the Company, which
are included as an exhibit to this annual report.

Objects

The Company is incorporated under the name ICON plc, and is registered in Ireland under registered number 145835.
The Company's objects, which are detailed in the Constitution of the Company, are broad and include, but are not limited to the
carrying on the business of an investment holding company.

Directors

Subject to certain exceptions, Directors may not vote on matters in which they have a material interest. Any Director
who holds any executive office, serves on any Committee or otherwise performs services, which, in the opinion of the Directors,
are outside the scope of the ordinary duties of a Director, may be paid such extra remuneration as the Directors may determine.
The Directors may exercise all the powers of the Company to borrow money. These powers may be amended by special
resolution of the shareholders. The Directors are not required to retire at any particular age. One-third of the Directors retire and
offer themselves for re-election at each Annual General Meeting ("AGM") of the Company. The Directors to retire by rotation are
those who have been longest in office since their last appointment or reappointment. As between persons who became or were
appointed Directors on the same date, those to retire are determined by agreement between them or, otherwise, by lot. All of the
shareholders entitled to attend and vote at the AGM may vote on the re-election of Directors. There is no requirement for
Directors to hold shares set out in the Constitution.

87
Rights, Preferences and Dividends Attaching to Shares

The Company has only one class of shares, Ordinary Shares with a par value of €0.06 per share. All such Ordinary
Shares rank equally with respect to voting, payment of dividends and on any winding-up of the Company. Any dividend, interest
or other sum payable to a shareholder that remains unclaimed for one year after having been declared may be invested by the
Directors for the benefit of the Company until claimed. If the Directors so resolve, any dividend which has remained unclaimed
for 12 years from the date of its declaration shall be forfeited and cease to remain owing by the Company. In the event of the
Company being wound up, if the assets available for distribution among the Members shall be more than sufficient to repay the
whole of the share capital paid up or credited as paid up at the commencement of the winding up, the excess shall be distributed
among the Members in proportion to the capital at the commencement of the winding up paid up or credited as paid up on the
said Ordinary Shares held by them respectively. An Ordinary Share shall be deemed to be a redeemable share in certain
circumstances. The liability of shareholders to invest additional capital is limited to the amounts remaining unpaid on the shares
held by them.

Action Necessary to Change the Rights of Shareholders

The rights attaching to shares in the Company may be varied by special resolutions passed at class meetings of that

class of shareholders of the Company.

Annual and General Meetings

The AGM shall be held in such place and at such time as shall be determined by the board, but no more than
15 months shall pass between the dates of consecutive AGMs. Directors may call an Extraordinary General Meeting (“EGM”) at
any time. The members, in accordance with the Constitution of the Company and Irish Company law, may also requisition EGMs.
Notice of the AGM or an EGM passing any special resolution must be given at least 21 clear days prior to the scheduled date
and, in the case of any other general meeting, not less than 14 clear days’ notice. All holders of Ordinary Shares are entitled to
attend, speak at and vote at general meetings of the Company.

Limitations on the Right to Own Shares

There are no limitations on the right to own shares in the Constitution of the Company.

Disclosure of Share Ownership

Under Irish law, the Company can require parties to disclose their interests in shares. The Constitution of the Company
entitle the Directors to require parties to provide details regarding their identity and the nature and extent of any interest which
such parties hold in Ordinary Shares. Under Irish law, if a party acquires or disposes of Ordinary Shares so as to bring their
interest above or below 3% of the total issued share capital of the Company, they must notify the Company of that. The Company
would also need to be notified of the acquisition by an existing substantial (i.e. 3% plus) shareholder, of every movement of one
whole percentage integer (e.g. 3.9% to 4.1% but not 4.1% to 4.9%) or more.

Other Provisions of the Constitution

There are no provisions in the Constitution of the Company:

(i) delaying or prohibiting a change in the control of the Company, but which operate only with respect to a merger,
acquisition or corporate restructuring;

(ii) discriminating against any existing or prospective holder of shares as a result of such shareholder owning a
substantial number of shares; or

(iii) governing changes in capital, in each case, where such provisions are more stringent than those required by law.

C. Material Contracts

The following is a summary of each contract (not being a contract entered into in the ordinary course of business) that
has been entered into: (a) within the two years immediately preceding the date of this Form 20-F which are, or may be, material
to us; or (b) at any time which contain obligations or entitlements which is, or may be, material to us as at the date of this Form
20-F:

Agreement and Plan of Merger

On February 24, 2021, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) with PRA Health
Sciences, Inc. (“PRA”), ICON US Holdings Inc., a Delaware corporation and subsidiary of ICON (“US HoldCo”), and Indigo
Merger Sub, Inc., a Delaware corporation and subsidiary of ICON and US HoldCo (“Merger Subsidiary”). Upon the terms and
subject to the conditions of the Merger Agreement, Merger Subsidiary will merge with and into PRA (the “Merger”), with PRA
surviving as a subsidiary of ICON and US HoldCo (the “Surviving Corporation”).

On July 1, 2021 (the “Closing Date”), Pursuant to the terms and subject to the conditions of the Merger Agreement,

Merger Sub was merged with and into PRA, with PRA surviving as a subsidiary of ICON and US HoldCo.

88As a result of the Merger, each share of PRA common stock issued and outstanding immediately prior to the completion
of the Merger (other than shares held by any shareholder who properly demands and perfects his, her or its appraisal rights with
respect to such shares and treasury shares held by PRA) was cancelled and converted into the right to receive: (i) from ICON,
0.4125 of one ICON ordinary share and (ii) from US Holdco and the surviving corporation $80.00 in cash, without interest.

Equity awards of PRA that are outstanding prior to the effective time of the Merger were generally treated as follows

(subject to the terms and conditions set forth in the Merger Agreement):

•

Each outstanding PRA stock option and restricted stock unit was assumed by ICON on the same terms and conditions
(including vesting conditions) and converted to a stock option or restricted stock unit based on ICON ordinary shares
with the number of ICON ordinary shares and exercise price in the case of stock options determined at a conversion
ratio as set forth under the Merger Agreement; and
Each outstanding share of PRA restricted stock was vested at the Closing and was cancelled and converted into the
right to receive the per share merger consideration.

The foregoing description of the Merger and the Merger Agreement, and the related transactions contemplated thereby,
does not purport to be complete and is subject to, and qualified in its entirety by reference to, the full text of the Merger
Agreement which is attached as Exhibit 2.1 to ICON’s Current Report on Form 6-K filed with the Securities and Exchange
Commission (the “SEC”) on February 24, 2021 and incorporated herein by reference herein.

Senior Secured Credit Facilities

The Senior Secured Credit Facilities contain customary negative covenants, including, but not limited to, restrictions on
the ability of ICON and its subsidiaries to merge and consolidate with other companies, incur indebtedness, grant liens or
security interests on assets, pay dividends or make other restricted payments, sell or otherwise transfer assets or enter into
transactions with affiliates. In addition, the Revolving Credit Facility contains a financial covenant that requires ICON to maintain
a Total Net Leverage Ratio (as defined in the Credit Agreement) of 5.75:1.00 prior to June 30, 2023 and 4.50:1.00 on and after
June 30, 2023, subject to a step-down of 0.50:1.00 following a Material Acquisition (as defined in the Credit Agreement), which
will be tested at the end of any fiscal quarter only if amounts are drawn under the Revolving Credit Facility (excluding cash
collateralized and backstopped letters of credit) in excess of 30% of the Revolving Commitments.

The Senior Secured Credit Facilities provide that, upon the occurrence of certain events of default, the obligations
thereunder may be accelerated. Such events of default will include payment defaults to the lenders thereunder, material
inaccuracies of representations and warranties, covenant defaults, cross-defaults to other material indebtedness, voluntary and
involuntary bankruptcy proceedings, material money judgments, material pension-plan events, change of control and other
customary events of default.

At December 31, 2021, no amounts have been drawn under the revolving loan facility with the exception of $4.1 million

letters of credit given to landlords to guarantee lease arrangements.

89Senior Secured Notes

In addition to the Senior Secured Credit Facilities, on July 1, 2021, Indigo Merger Sub, Inc. (which was merged with and
into PRA Health Sciences, Inc.) (the “Issuer”), a wholly-owned subsidiary of the Company, issued $500.0 million in aggregate
principal amount of 2.875% senior secured notes due July 2026 (the “Senior Secured Notes”) in a private offering (the
“Offering”). The Senior Secured Notes will mature on July 15, 2026. The Issuer will pay interest on the Senior Secured Notes on
January 15 and July 15 of each year. Interest on the Senior Secured Notes will accrue at a rate of 2.875% per annum.

The proceeds from the Offering and borrowings made under the Senior Secured Credit Facilities, together with cash on
hand, were used to (i) fund the cash consideration payable by ICON for the Merger, (ii) repay existing indebtedness of ICON and
PRA and (iii) pay fees and expenses related to the Merger, the Offering and the Senior Secured Credit Facilities.

The Senior Secured Notes are guaranteed on a senior secured basis by ICON and its direct and indirect subsidiaries
that guarantee the Senior Secured Credit Facilities. The Senior Secured Notes are secured by a lien on substantially all of
ICON’s, the Issuer’s and each of the subsidiary guarantor’s assets (subject to certain exceptions), and the Senior Secured Notes
have a first-priority lien on such assets, which rank pari passu with the liens securing the Senior Secured Credit Facilities, subject
to other permitted liens.

At any time prior to July 15, 2023, the Issuer may redeem all or part of the Senior Secured Notes at a redemption price
equal to 100% of the principal amount of the Notes plus an applicable make whole premium and accrued and unpaid interest to,
but not including the redemption date. At any time prior to July 15, 2023, the Issuer may redeem up to 40% of the aggregate
principal amount of the Senior Secured Notes at a redemption price of 102.875% of the principal amount plus accrued and
unpaid interest to, but not including, the date of redemption. In addition, at any time and from time to time prior to July 15, 2023,
the Issuer may redeem up to 10% per annum of the aggregate principal amount of the Senior Secured Notes at a redemption
price of 103.000% of the aggregate principal amount thereof, plus accrued and unpaid interest, if any, to, but excluding, the date
of redemption.

The Indenture contains contain customary negative covenants, including, but not limited to, restrictions on the ability of
ICON and its subsidiaries to merge and consolidate with other companies, incur indebtedness, grant liens or security interests on
assets, pay dividends or make other restricted payments, sell or otherwise transfer assets or enter into transactions with
affiliates. The Indenture contains customary events of default and remedies.

D. Exchange Controls and Other Limitations Affecting Security Holders

Irish exchange control regulations ceased to apply from and after December 31, 1992. Except as indicated below, there
are no restrictions on non-residents of Ireland dealing in domestic securities, which includes shares or depository receipts of Irish
companies. Except as indicated below, dividends and redemption proceeds also continue to be freely transferable to non-
resident holders of such securities.

The Financial Transfers Act, 1992 gives power to the Minister for Finance of Ireland to make provision for the restriction
of financial transfers between Ireland and other countries and persons. Financial transfers are broadly defined, and include all
transfers which would be movements of capital or payments within the meaning of the treaties governing the European
Communities. The acquisition or disposal of shares issued by an Irish incorporated company and associated payments may fall
within this definition. In addition, dividends or payments on redemption or purchase of shares and payments on a liquidation of
an Irish incorporated company would fall within this definition.

The Financial Transfers Act, 1992 prohibits financial transfers involving a number of persons, entities and bodies, which
is subject to amendment on an ongoing, regular basis and currently includes, but is not limited to: certain persons and activities
in Belarus, Bosnia & Herzegovina, Burundi, Sudan, South Sudan, the Central African Republic, Libya, Lebanon, Mali, the
Democratic People's Republic of Korea, Myanmar/Burma, Tunisia, Zimbabwe, Venezuela, certain persons, entities and bodies in
Syrian Arab Republic, the Republic of Guinea-Bissau, Nicaragua, Democratic Republic of Congo, Iran, Ukraine, associated with
the Taliban in Afghanistan; associated with ISIL (Da’esh) and Al-Qaeda; associated with Turkey’s unauthorized drilling activities in
the Eastern Mediterranean and certain known terrorists and terrorist groups and countries that harbor certain terrorist groups,
without the prior permission of the Central Bank of Ireland.

There are no restrictions under the Company’s Constitution or under Irish Law that limit the right of non-residents or

foreign owners to hold the Company’s ordinary shares or vote at general meetings of the Company.

90E. Taxation

General

The following discussion is based on existing Irish tax law, Irish court decisions and the practice of the Revenue
Commissioners of Ireland, and the convention between the United States and Ireland for the Avoidance of Double Taxation and
the Prevention of Fiscal Evasion with respect to income and capital gains (the "Treaty"). This discussion does not purport to deal
with the tax consequences of owning the ordinary shares for all categories of investors, some of which may be subject to special
rules. Prospective purchasers of ordinary shares are advised to consult their own tax advisors concerning the overall tax
consequences arising in their own particular situations under Irish law. Each prospective investor should understand that future
legislative, administrative and judicial changes could modify the tax consequences described below, possibly with retroactive
effect.

As used herein, the term "U.S. Holder" means a beneficial owner of ordinary shares that (i) owns the ordinary shares as
capital assets; (ii) is a U.S. citizen or resident, a U.S. corporation, an estate the income of which is subject to U.S. federal income
taxation regardless of its source or a trust that meets the following two tests: (A) a U.S. court is able to exercise primary
supervision over the administration of the trust, and (B) one or more U.S. persons have the authority to control all substantial
decisions of the trust; and for the purpose of the discussion under Irish Taxation of U.S. Holders (A) is not a resident of, or
ordinarily resident in, Ireland for the purposes of Irish tax; and (B) is not engaged in trade or business in Ireland through a
permanent establishment.

AS USED HEREIN, REFERENCES TO THE ORDINARY SHARES SHALL INCLUDE SHARES HELD IN THE

ACCOUNTS OF PARTICIPANTS THROUGH THE DEPOSITARY TRUST COMPANY (“THE DTC”).

Irish Taxation

Irish corporation tax on income

ICON is a public limited company incorporated and resident for tax purposes in Ireland by virtue of its place of central

management and control being in Ireland.

Companies which are resident in the Republic of Ireland are subject to Irish corporation tax on their total profits
(wherever arising and, generally, whether or not remitted to the Republic of Ireland). The question of residence, by virtue of
management and control, is essentially one of fact. It is the present intention of the Company's management to continue to
manage and control the Company from the Republic of Ireland, so that the Company will continue to be resident in the Republic
of Ireland.

The standard rate of Irish corporation tax on trading income (with certain exceptions) is currently 12.5%.

A research and development tax credit is available in Ireland where an Irish resident company incurs qualifying
expenditure on research and development activities. Qualifying expenditure incurred in a particular account period results in a
tax credit of 25% of that expenditure.

Corporation tax is charged at the rate of 25% on a company's non-trading income and certain types of trading income

not eligible for the lower rate of 12.5% referred to above.

Capital gains arising to an Irish resident company are liable to tax at 33%. However, a capital gains tax exemption is

available in Ireland for qualifying Irish resident companies in respect of disposals of certain qualifying shareholdings.

The exemption from capital gains tax on the disposal of shares by an Irish resident company will apply where certain

conditions are met. These conditions principally are:

•

The company claiming the exemption must hold (directly or indirectly) at least 5% of the ordinary share capital of the
company in which the interest is being disposed of, throughout a continuous period of at least 12 months, in the two
year period prior to disposal;

The shares being disposed of must be in a company, which at the date of disposal, is resident in a Member State of the
European Communities or in a country with which Ireland has signed or made specific arrangements to sign a double
tax agreement (together a “Relevant Territory”);

The shares must be in a company which is primarily a trading company or the company making the disposal together
with its “5% plus subsidiaries” should be primarily a trading group; and

The shares must not derive the greater part of their value from land or mineral rights in the State.

91Irish withholding tax on dividends

Unless specifically exempted, all dividends paid by the Company, will be subject to Irish withholding tax. The current

rate for dividend withholding tax is 25%.

An individual shareholder who is neither resident nor ordinarily resident for tax purposes in Ireland, but is resident in a
country with which Ireland has a double tax treaty, or in a member state of the European Communities, other than Ireland
(together, a Relevant Territory), will be exempt from withholding tax provided he or she makes the requisite declaration.

Irish resident corporate shareholders will be exempt from withholding tax. Where the shareholding held by the recipient
company, in the company paying the dividend is not 51% or greater a declaration must be made in order to avail of the
exemption.

Non-Irish resident corporate shareholders will be exempt from withholding tax on the production of the appropriate

certificates and declarations where they:

•

are resident in a Relevant Territory and are not controlled (directly or indirectly) by Irish residents;

are ultimately controlled (directly or indirectly) by residents of a Relevant Territory; or

have the principal class of their shares, or shares of a 75% parent, substantially and regularly traded on one or more
recognized stock exchanges in a Relevant Territory (including Ireland) or Territories; or

are wholly owned by two or more companies, each of whose principal class of shares is substantially and regularly
traded on one or more recognized stock exchanges in a Relevant Territory (including Ireland) or Territories.

U.S. holders of ordinary shares should note, however, that detailed documentation requirements may need to be
complied with. Special arrangements are available in the case of an interest in shares held in Irish companies through a
depositary or in accounts of participants through the DTC. In certain cases, the depositary or the DTC can receive and pass on a
dividend from an Irish company without deducting withholding tax, provided the depositary or the DTC is a qualifying
intermediary, and provided the person beneficially entitled to the distribution would meet the same conditions outlined above for
the withholding tax exemption to apply and has provided the qualifying intermediary with the appropriate declarations. The
depositary or the DTC shall be regarded as a qualifying intermediary provided the following conditions are met:

•

the depositary or the DTC is resident in a Relevant Territory; and

the depositary or the DTC have entered into a qualifying intermediary agreement with the Irish tax authorities; and

the depositary or the DTC have been authorized by the Irish Revenue Commissioners as a qualifying intermediary and
such authorization has not expired or been revoked.

92Irish income tax on dividends

Irish resident or ordinarily resident shareholders will generally be liable to Irish income tax on dividend income at their
marginal rate of income tax. This income may also be liable to Pay Related Social Insurance (“PRSI”) of up to 4% and the
Universal Social Charge (“USC”) of up to 11% (up to 15% in total).

Under certain circumstances, non-Irish resident shareholders will be subject to Irish income tax on dividend income.
Where withholding tax of 25% has been deducted, this will fully satisfy the non-Irish resident shareholder’s tax liability. No PRSI
or USC should apply in these circumstances.

However, a non-Irish resident shareholder will not have an Irish income tax liability on dividends from the Company if

the holder is neither resident nor ordinarily resident in the Republic of Ireland and the holder is:

•

an individual resident in the U.S. or in a Relevant Territory;

a corporation that is ultimately controlled by person(s) resident in the U.S. or in a Relevant Territory;

a corporation whose principal class of shares (or its 75% or greater parent’s principal class of shares) is substantially
and regularly traded on a recognized stock exchange in an EU country or in a Relevant Territory;

a corporation resident in another EU member state or in a Relevant Territory, which is not controlled directly or indirectly
by Irish residents; or

a corporation that is wholly owned by two or more corporations each of whose principal class of shares is substantially
and regularly traded on a recognized stock exchange in an EU country or in a Relevant Territory.

U.S. Holders who do not qualify for the above income tax exemption may be able to obtain treaty benefits under the

double tax treaty.

Irish domicile levy

Certain non-Irish resident individuals that are domiciled in Ireland will be subject to an annual levy of €200,000 if the
market value of their Irish-located property on 31 December exceeds €5,000,000, their worldwide annual income exceeds
€1,000,000 and their liability to Irish Income Tax in that year is less than €200,000.

Irish capital gains tax on disposal of shares

Irish resident or ordinarily resident shareholders will be liable to capital gains tax at 33% on gains arising from the

disposal or part disposal of their shareholding.

A person who is not resident or ordinarily resident in Ireland, who has not been an Irish resident within the past five
years and who does not carry on a trade in Ireland through a branch or agency will not be subject to Irish capital gains tax on the
disposal of ordinary shares or shares held in accounts of participants through the DTC, so long as the shares do not derive the
greater part of their value from Irish land or mineral rights.

There are provisions to subject a person who disposes of an interest in a company while temporarily being non-Irish

resident, to Irish capital gains tax. This treatment will apply to Irish domiciled individuals:

•

who cease to be Irish resident;

who beneficially own the relevant assets when they cease to be resident;

if there are not more than 5 years of assessment between the last year of Irish tax residence prior to becoming
temporarily non-resident and the tax year that he/she resumes Irish tax residency;

who dispose of the relevant assets during this temporary non-residence; and

the interest disposed of represents 5% or greater of the issued share capital of the company or is worth at least
€500,000.

In these circumstances the person will be deemed, for Irish capital gains tax purposes, to have sold and immediately

reacquired the interest in the company on the date of his or her departure and will be subject to tax at 33% of the taxable gain.

93Irish capital acquisitions tax

Irish capital acquisitions tax (referred to as CAT) applies to gifts and inheritances. Subject to certain tax-free thresholds,

gifts and inheritances are liable to tax at 33%.

Where a gift or inheritance is taken under a disposition made after December 1, 1999 it will be within the charge to CAT:

•

to the extent that the property of which the gift or inheritance consists is situated in the Republic of Ireland at the date of
the gift or inheritance;

where the person making the gift or inheritance is or was resident or ordinarily resident in the Republic of Ireland at the
date of the disposition under which the gift or inheritance is taken;

in the case of a gift taken under a discretionary trust where the person from whom the gift is taken was resident or
ordinarily resident in the Republic of Ireland at the date he/she made the settlement, or at the date of the gift or, if he/
she is dead at the date of the gift, at the date of his/her death; or

where the person receiving the gift or inheritance is resident or ordinarily resident in the Republic of Ireland at the date
of the gift or inheritance.

For these purposes a non-Irish domiciled individual will not be regarded as resident or ordinarily resident in the Republic
of Ireland on a particular date unless they are resident or ordinarily resident in the Republic of Ireland on that date and have been
resident for the 5 consecutive tax years immediately preceding the year of assessment in which the date falls.

The person who receives the gift or inheritance (“the beneficiary”) is primarily liable for CAT. In the case of an
inheritance, where a beneficiary and personal representative of the deceased are both non-residents, a solicitor must be
appointed to be responsible for paying inheritance tax. Taxable gifts or inheritances received by an individual since December 5,
1991 from donors in the same threshold class are aggregated and only the excess over a specified tax-free threshold is taxed.
The tax-free threshold is dependent on the relationship between the donor and the donees and the aggregation since December
5, 1991 of all previous gifts and inheritances, within the same tax threshold.

The tax-free threshold amounts that apply are:

•

€16,250 in the case of persons who are not related to one another;

€32,500 in the case of gifts or inheritances received from inter alia a brother or sister or from a brother or sister of a
parent or from a grandparent; and

€335,000 in the case of gifts and inheritances received from a parent (or from a grandparent by a minor child of a
deceased child) and specified inheritances received by a parent from a child for gifts or inheritances taken on or after
October 9, 2019.

Gifts and inheritances passing between spouses are exempt from CAT.

A gift or inheritance of the Company’s ordinary shares or American Depositary Shares (ADSs) will be within the charge
to Irish capital acquisitions tax, notwithstanding that the person from whom or by whom the gift or inheritance is received is
domiciled or resident outside Ireland.

The Estate Tax Convention between Ireland and the United States generally provides for Irish capital acquisitions tax
paid on inheritances in Ireland to be credited against U.S. Federal Estate tax payable in the United States and for tax paid in the
United States to be credited against tax payable in Ireland, based on priority rules set forth in the Estate Tax Convention. The
Estate Tax Convention does not apply to Irish capital acquisitions tax paid on gifts.

Irish stamp duty

Irish stamp duty, which is a tax on certain documents, is payable on all transfers of ordinary shares (other than between
spouses) whenever a document of transfer is executed. Where the transfer is attributable to a sale, stamp duty will be charged at
a rate of 1%, rounded to the nearest euro. The stamp duty is calculated on the amount or value of the consideration (i.e.
purchase price) or, if the transfer is by way of a gift (subject to certain exceptions) or for consideration less than the market value,
on the market value of the shares. Where the consideration for the sale is expressed in a currency other than euro, the duty will
be charged on the euro equivalent calculated at the rate of exchange prevailing on the date of the transfer.

Transfers through the DTC of book entry interests in shares are not subject to Irish stamp duty.

A transfer of ordinary shares by a shareholder to a depositary or custodian for deposit and a transfer of ordinary shares
from the depositary or the custodian for the purposes of the withdrawal of the underlying ordinary shares in accordance with the
terms of a deposit agreement will be subject to stamp duty at the 1% rate if the transfer relates to a sale, a contemplated sale, a
gift or any other change in the beneficial ownership of such ordinary shares. However, transfers of ordinary shares into or out of
the DTC are not subject to Irish stamp duty where no change in beneficial ownership of the shares has occurred and provided a
contract for sale in respect of the transferring shares is not in place.

94The person accountable for payment of stamp duty is normally the transferee or, in the case of a transfer by way of gift,

or for a consideration less than the market value, all parties to the transfer.

Transfers of ordinary shares between associated companies (broadly, companies within a 90% group relationship and
subject to the satisfaction of certain conditions) are exempt from stamp duty in the Republic of Ireland. In the case of transfers of
ordinary shares where no beneficial interest passes (e.g. a transfer of shares from a beneficial owner to his nominee), no stamp
duty arises.

No stamp duty shall arise on the transfer of ordinary shares where the consideration for the transfer does not exceed
€1,000, provided the instrument contains a statement certifying that the transaction does not form part of a larger transaction or a
series of larger transactions, in respect of which the amount of the total consideration attributable to the shares would exceed
€1,000.

F. Dividends and paying agents

Not applicable.

G. Statement by experts

Not applicable.

H. Documents on Display

We are subject to the informational requirements of the Securities Exchange Act of 1934, as amended, (the “Exchange
Act”) and file reports and other information with the SEC. The SEC maintains a website that contains reports, proxy and
information statements and other information regarding registrants that file electronically with the SEC at http://www.sec.gov.

We “incorporate by reference” information that we file with the SEC, which means that we can disclose important
information to you by referring you to those documents. The information incorporated by reference is an important part of this
report and more recent information automatically updates and supersedes more dated information contained or incorporated by
reference in this report. Our SEC file number for Exchange Act reports is 333-08704.

As a foreign private issuer, we are exempt from certain rules under the Exchange Act, including prescribing the

furnishing and content of proxy statements to shareholders.

We will provide without charge to each person, including any beneficial owner, on the written or oral request of such
person, a copy of any or all documents referred to above which have been or may be incorporated by reference in this report (not
including exhibits to such incorporated information that are not specifically incorporated by reference into such information).
Requests for such copies should be directed to us at the following address: ICON plc, South County Business Park,
Leopardstown, Dublin 18, Ireland, D18 X5R3 Attention: Corporate Governance, email: corporate.governance@iconplc.com.

Subsidiary Information

Not applicable.

Exemptions From Corporate Governance Listing Requirements Under the NASDAQ Marketplace Rules

NASDAQ may provide exemptions from certain NASDAQ corporate governance standards to a foreign private issuer if,
among other reasons those standards are contrary to a law, rule or regulation of a public authority exercising jurisdiction over
such issuer or contrary to generally accepted business practices in the issuer’s home country of domicile, provided, that, the
foreign private issuer properly notifies NASDAQ and makes the required disclosure except to the extent that such exemptions
would be contrary to United States federal securities laws.

95The exemptions that the Company relies on, and the practices the Company adheres to, are as follows:

• The Company is exempt from provisions set forth in NASDAQ Rule 5620(c), which requires each issuer (other than
limited partnerships) to provide for a quorum in its by-laws for any meeting of the holders of common stock, which
shall in no case be less than 33.33% of the outstanding shares of the issuer’s common voting stock. The Company’s
Constitution requires that only 3 members be present, in person or by proxy, at a shareholder meeting to constitute a
quorum. This quorum requirement is in accordance with Irish law and generally accepted business practices in
Ireland.

• The Company is exempt from provisions set forth in NASDAQ Rule 5635(c) which requires (other than for certain
specified exceptions) shareholder approval prior to the establishment or material amendment of a stock option or
purchase plan or other equity compensation arrangement made or materially amended, pursuant to which stock may
be acquired by officers, Directors, employees or consultants. Irish law does not require shareholder approval with
respect to equity compensation arrangements. Accordingly, the 2019 Consultants and Directors Restricted Share
Unit Plan, the 2013 Employees Restricted Share Unit Plan and the amendments to the Employee Share Option Plan
2008 and Consultants Share Option Plan 2008 were adopted by the Board of Directors without shareholder
approval.

• The Company is exempt from provisions set forth in NASDAQ Rule 5605(b)(2), which requires independent
Directors to hold regularly scheduled meetings at which only independent Directors are present. Irish law does not
require independent Directors to hold regularly scheduled meetings at which only independent Directors are present.
The Company holds regularly scheduled meetings which all of the Directors may attend and the Lead Independent
Director may call meetings of the independent Directors and non-employee Directors of the Board, as appropriate, in
accordance with the Lead Independent Director Charter.

Item 11. Quantitative and Qualitative Disclosures about Market Risk.

The principal market risks (i.e. risk of loss arising from adverse changes in market rates and prices) to which we are

exposed include foreign currency risk and interest rate risk.

Foreign Currency Exchange Risk

We are subject to a number of foreign currency risks given the global nature of our operations. The principal foreign
currency risks to which the business is subject to includes both foreign currency translation risk and foreign currency transaction
risk.

Although domiciled in Ireland, we report our results in U.S. dollars. As a consequence, the results of our non-U.S. based
operations, when translated into U.S. dollars, could be affected by fluctuations in exchange rates between the U.S. dollar and the
currencies of those operations.

We are also subject to foreign currency transaction exposures as the currency in which our contracts are priced can be
different from the currencies in which costs relating to those contracts are incurred. Our operations in the United States are not
materially exposed to such currency differences as the majority of revenues and costs are in U.S. dollars. However, outside the
United States the multinational nature of our activities means that contracts may be priced in a single currency, most often U.S.
dollars, or euro, while costs arise in a number of currencies, depending, among other things, on which of our offices provide staff
for the contract and the location of investigator sites. Although many such contracts benefit from some degree of natural hedging
due to the matching of contract revenues and costs in the same currency, where costs are incurred in currencies other than
those in which contracts are priced, fluctuations in the relative value of those currencies could have a material effect on our
results of operations. We regularly review our foreign currency exposures and enter into forward currency contracts to manage
our exposure. We had no open foreign currency contracts at December 31, 2021.

The following significant exchange rates applied during the year:

Euro:USD

Pound Sterling:USD

Average Rate

Closing Rate

2021

1.1886

1.3788

2020

1.1357

1.2821

2021

1.1370

1.3532

2020

1.2216

1.3670

96
Interest Rate Risk

We are exposed to interest rate risk in respect of our cash and cash equivalents and available for sale investments. Our
treasury function actively manages our available cash resources and invests significant cash balances to ensure optimum
returns for the Company. Financial instruments are classified either as cash and cash equivalents or available for sale
investments depending upon the maturity of the related investment. Funds may be invested in the form of floating rate notes and
medium term minimum “A-” rated corporate securities. We may be subject to interest rate risk in respect of interest rate changes
on amounts invested. Interest rate risk is managed by monitoring the composition of the Company’s investment portfolio on an
ongoing basis having regard to current market interest rates and future trends.

In conjunction with the completion of the Merger Agreement, on July 1, 2021, ICON entered into a credit agreement
providing for a Senior Secured Term Loan Facility of $5,515 million. Borrowings under the Senior Secured Term Loan facility
amortize in quarterly installments equal to 1.00% per annum of the original principal amount ($5,515 million), and the remaining
balance is due for repayment by July 2028. The interest rate margin applicable to the borrowings under the Senior Secured Term
Loan Facility will be, at the option of the applicable borrower (as defined in the credit agreement), either (1) the base rate ( as
described in the credit agreement) plus an applicable margin of 1.50% or (2) LIBOR plus an applicable margin of 2.50%, in each
case , with a step down of 0.25% if the first lien net leverage ratio is equal to or less than 4.00 to 1.00. The senior secured facility
is subject to a LIBOR floor of 0.50%

As at the December 31, 2021 the outstanding principal amount of the Senior Secured Term Loan Facility was $5,001
million. The applicable interest rate for the next quarterly interest period is expected to be 2.75%, comprising of the lower margin
of 2.25% and the LIBOR floor of 0.50%. The interest rate is fixed on this debt on a calendar quarter basis and is subject to
external market conditions. As at December 31, 2021 no hedges had been entered into to fix the interest on this debt beyond the
quarterly term.

In addition to the Senior Secured Facilities, on July 1, 2021, the Company issued $500 million in aggregate principal
senior notes due in 2026 in a private (“the Offering “). The Senior Secured Notes will mature in July 2026 and pay a fixed semi
annual coupon to investors of 2.875% per annum. This debt is not subject to movements in interest rate conditions.

We regularly evaluate our debt arrangements, as well as market conditions, and we will explore the opportunity to
modify our existing arrangements or pursue additional financing arrangements that may result in the issuance of new debt
securities by us or our affiliates.

The sensitivity analysis below represents the hypothetical change in the net interest payable of a 1% movement in

market interest rates.

Interest income

Interest expense

Interest for the year ended
December 31, 2021 (in
thousands)

Interest
Change 1% increase in
market interest rate
(in thousands)

Interest
Change 1% decrease in
market interest rate
(in thousands)

$574

($182,423)

($181,849)

$9,772

($206,398*)

($196,626)

($150,178*)

($150,177)

* 14% of the interest costs fixed due to high yield bond issuance. $88.6 million financing fees have been allocated to interest cost
which are not impacted by a change in interest rate.

Item 12. Description of Securities Other than Equity Securities.

Not applicable.

Part II

Item 13. Defaults, Dividend Arrearages and Delinquencies.

None.

Item 14. Material Modifications to the Rights of Security Holders and Use of Proceeds.

None.

Item 15. Controls and Procedures.

A. Disclosure controls and procedures

An evaluation was carried out under the supervision and with the participation of the Company's management, including
the Chief Executive Officer (CEO) and the Chief Financial Officer (CFO), of the effectiveness of our disclosure controls and
procedures as at December 31, 2021. Based on that evaluation, the CEO and CFO have concluded that the Company's
disclosure controls and procedures are effective to ensure that information required to be disclosed by the Company in reports
that it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the
time periods specified in Securities and Exchange Commission rules and forms.

Following the completion of the Merger on July 1, 2021, Management has continued to progress the integration of PRA
into the established internal control framework of the Company. As of December 31, 2021, Management have not yet formally
completed its evaluation of the internal control framework of PRA and management have elected to exclude the acquired
business from its assessment of internal control over financial reporting as of December 31, 2021. Management expect to have
completed its evaluation by June 30, 2022. PRA represented 10% of total assets as of December 31, 2021 and 38% of revenue
for the year then ended.

B. Management's Annual Report on Internal Accounting Control over Financial Reporting

Reference is made to page 102 of this Form 20-F.

C. Attestation Report of Independent Registered Public Accounting Firm

Reference is made to page 103 of this Form 20-F.

D. Changes in Internal Controls over Financial Reporting

There were no changes in our internal controls over financial reporting during the period covered by this Form 20-F that

have materially affected or are reasonably likely to materially affect our internal controls over financial reporting.

Item 16. Reserved.

Item 16A. Audit Committee Financial Expert

Mr. Rónán Murphy acts as the Audit Committee financial expert serving on our Audit Committee and Board of Directors.

The Board has determined that Mr. Murphy is independent.

Item 16B. Code of Ethical Conduct

Our Global Code of Ethical Conduct applies to all officers, directors, employees, consultants and agents globally of

ICON plc, its subsidiaries and branches. There are no waivers from the provisions of the Code of Ethical Conduct that are
required to be disclosed. This Code of Ethical Conduct is available on our website at: https://investor.iconplc.com/corporate-
governance/governance-documents .

Item 16C. Principal Accountant Fees and Services

Our principal accountants for the years ended December 31, 2021 and December 31, 2020 were KPMG, Dublin, Ireland
(Audit firm ID: 1116). The table below summarizes the fees for professional services rendered by KPMG for the audit of our
annual financial statements for the years ended December 31, 2021 and December 31, 2020 and fees billed for other services
rendered by KPMG.

Audit fees (1)

Audit related fees (2)

Tax fees (3)

Total

12 month period ended
December 31, 2021 (in
thousands)

12 month period ended
December 31, 2020 (in
thousands)

$2,906

$2,113

$4,066

32 %

23 %

45 %

$1,438

$211

$765

60 %

9 %

31 %

$9,085

100 %

$2,414

100 %

(1) Audit fees include annual audit fees for the Company and its subsidiaries.

(2) Audit related fees principally consist of fees for financial due diligence services, fees for the audit of employee benefit plans
and fees for pension reviews.

(3) Tax fees are fees for tax compliance and tax consultation services.

The Audit Committee pre-approves all audit and non-audit services provided to the Company by its auditors.

Item 16D. Exemptions from the Listing Standards for Audit Committees

Not applicable.

Item 16E. Purchases of Equity Securities by the Issuer and Affiliated Purchasers

No ordinary shares were redeemed by the Company during the year ended December 31, 2021.

In the year ended December 31, 2020, 1,235,218 ordinary shares were redeemed by the Company for a total
consideration of $175.0 million. All ordinary shares that are redeemed under the buyback program were canceled in accordance
with the constitutional documents of the Company and the nominal value of these shares transferred to an undenominated
capital fund as required under Irish Company law.

Total Number
of Shares Purchased

Average Price Paid
per Share

Total Number
of Shares Purchased

Total Price
Paid for Shares
Purchased

February 02/1/20 – 02/29/20
March 03/1/20 – 03/31/20

91,944

1,143,274

1,235,218

(in thousands, except per share data)

$160.49

$140.16

$141.68

91,944

1,143,274

1,235,218

$14,756

$160,244

$175,000

On January 8, 2019, the Company commenced a share buyback program of up to 1.0 million shares which was
completed during the year ended December 31, 2019. These shares were redeemed by the Company for a total consideration
of $141.6 million.

Total Number
of Shares Purchased

Average Price Paid
per Share

Total Number
of Shares Purchased
as
Part of a
Publicly Announced
Plan

Total Price
Paid for Shares
Purchased as
Part of a
Publicly Announced
Plan

January 1/1 /19– 1/31/19

April 4/1/19 – 4/30/19

May 5/1/19 – 5/31/19

August 8/1/19 – 8/31/19

September 9/1/19 – 9/30/19

200,253

58,630

237,352

6,495

497,270

1,000,000

(in thousands, except per share data)

$124.84

$129.91

$136.86

$152.00

$151.80

$141.57

200,253

58,630

237,352

6,495

497,270

1,000,000

$25,000

$7,617

$32,483

$987

$75,486

$141,573

On October 22, 2019, the Company commenced a further share buyback program. At December 31, 2019, 35,100
ordinary shares were redeemed for a total consideration of $5.3 million. All ordinary shares that were redeemed under the
buyback programs were canceled in accordance with the Constitution of the Company and the nominal value of these shares
transferred to other undenominated capital as required under Irish Company law.

October 10/1/19 – 10/31/19

Total Number
of Shares Purchased

Average Price Paid
per Share

Total Number
of Shares Purchased

Total Price
Paid for Shares
Purchased

(in thousands, except per share data)

35,100

$152.66

35,100

$5,358

Under the repurchase programs, a broker purchased the Company's shares from time to time on the open market or in
privately negotiated transactions in accordance with agreed terms and limitations. The programs are designed to allow share
repurchases during periods when the Company would ordinarily not be permitted to do so because it may be in possession of
material non-public or price-sensitive information, applicable insider trading laws or self-imposed trading blackout periods. The
Company's instructions to the broker were irrevocable and the trading decisions in respect of the repurchase programs were
made independently of and uninfluenced by the Company. The Company confirms that on entering the share repurchase plans it
had no material non-public, price-sensitive or inside information regarding the Company or its securities. Furthermore, the
Company will not enter into additional plans whilst in possession of such information. The timing and actual number of shares
acquired by way of the redemption will be dependent on market conditions, legal and regulatory requirements and the other
terms and limitations contained in the programs. In addition, acquisitions under the programs may be suspended or discontinued
in certain circumstances in accordance with the agreed terms. Therefore, there can be no assurance as to the timing or number
of shares that may be acquired under the programs.

Item 16F. Changes in Registrant's Certifying Accountant

Not applicable.

Item 16G. Corporate Governance

See Item 10 "Exemptions from Corporate Governance Listing Requirements under the NASDAQ Marketplace Rules".

Item 16H. Mine Safety Disclosure

Not applicable.

Part III

Item 17. Financial Statements.

See item 18.

Item 18. Financial Statements.

Reference is made to pages 102 to 158 of this Form 20-F.

Item 19. Exhibits.

Consolidated Financial Statements of ICON plc and subsidiaries

Exhibits of ICON plc and subsidiaries

Management's Report on Internal Control over Financial Reporting

Reports of Independent Registered Public Accounting Firm

Consolidated Balance Sheets as at December 31, 2021 and December 31, 2020

Consolidated Statements of Operations for the years ended December 31, 2021, December 31, 2020 and
December 31, 2019

Consolidated Statements of Comprehensive Income for the years ended December 31, 2021, December 31, 2020 and
December 31, 2019

Consolidated Statements of Shareholders' Equity and Comprehensive Income for the years ended December 31, 2021,
December 31, 2020 and December 31, 2019

Consolidated Statements of Cash Flows for the years ended December 31, 2021, December 31, 2020 and
December 31, 2019

Notes to the Consolidated Financial Statements

100Exhibits of ICON plc and subsidiaries

Exhibit
Number

Title

2.1

2.2*

2.3

2.4

3.1

12.1*

12.2*

21.1

23.1*

Agreement and Plan of Merger, dated as of February 24, 2021, by and among ICON plc, ICON US
Holdings Inc., Indigo Merger Sub, Inc and PRA Health Sciences, Inc. (incorporated by reference to exhibit
2.1 to the Form 6K (file No. 333-08704) filed on February 24, 2021.

Description of Securities Registered Under Section 12 of the Exchange Act.

Credit Agreement, dated as of July 1, 2021, by and among ICON Luxembourg, S.À R.L., ICON Clinical
Investments, LLC, Indigo Merger Sub, Inc. (which, after giving effect to the Merger on the Closing Date
was succeeded by PRA Health Sciences, Inc.), ICON Public Limited Company, the other borrowers party
thereto from time to time, the subsidiary guarantors party thereto from time to time, lenders party thereto
Citibank, N.A., as administrative agent, and Citibank, N.A., London Branch, as collateral agent
(incorporated by reference to exhibit 99.1 to the Form 6K (File No. 333-08704) filed on July 1, 2021).

Indenture, dated as of July 1, 2021, by and among Indigo Merger Sub, Inc., PRA Health Sciences, Inc.,
the guarantors party thereto and Citibank, N.A., London Branch as trustee, notes collateral agent, paying
agent, transfer agent and registrar (incorporated by reference to exhibit 99.2 to the Form 6K (File No.
333-08704) filed on July 1, 2021).

Description of the Constitution of the Company (incorporated by reference to exhibit 99.2 to the Form 6K
(File No. 333-08704) filed on July 25, 2016).

Section 302 certifications.

Section 906 certifications.

List of Subsidiaries (incorporated by reference to Item 4 of Form 20-F filed herewith).

Consent of KPMG, Independent Registered Public Accounting Firm.

101.1*

Interactive Data Files (XBRL – Related Documents).

* Filed herewith

101Management's Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting as

defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934.

The Company's internal control over financial reporting is a process designed by, or under the supervision of, the
Company's executive and financial officers and effected by the Company's board of Directors, management and other personnel,
to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for
external reporting purposes in accordance with generally accepted accounting principles.

A company's internal control over financial reporting includes those policies and procedures that (i) pertain to the
maintenance of records that, in reasonable detail, fairly reflect the transactions and dispositions of the assets of the company; (ii)
provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in
accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made
only in accordance with authorization of management and Directors of the company; and (iii) provide reasonable assurance
regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have
a material effect on the financial statements.

Because of the inherent limitation due to, for example, the potential for human error or circumvention of control, 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.

Management assessed the effectiveness of the Company's internal control over financial reporting as of December 31,
2021. In making this assessment, we used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway
Commission (COSO) in Internal Control – Integrated Framework 2013. Based upon the assessment performed, we determined
that, as of December 31, 2021 the Company's internal control over financial reporting was effective. There have been no
changes in the Company's internal control over financial reporting during 2021 that have materially affected, or are reasonably
likely to affect materially, the Group's internal control over financial reporting.

KPMG, an independent registered public accounting firm, has audited the consolidated financial statements of ICON plc
and subsidiaries as of and for the year ended December 31, 2021, included herein, and has issued an audit report on the
effectiveness of our internal control over financial reporting, which is included below.

102REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors

ICON plc:

Opinion on the Consolidated Financial Statements
We have audited the accompanying consolidated balance sheets of ICON, plc and subsidiaries (“the Company”) as of December
31, 2021 and 2020, the related consolidated statements of operations, comprehensive income, shareholders equity and
comprehensive income, and cash flows for each of the years in the three‑year period ended December 31, 2021, and the related
notes (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in
all material respects, the financial position of the Company as of December 31, 2021 and 2020, and the results of its operations
and its cash flows for each of the years in the three‑year period ended December 31, 2021, in conformity with U.S. generally
accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)
(“PCAOB”), the Company’s internal control over financial reporting as of December 31, 2021, based on criteria established in
Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway
Commission, and our report dated March 1, 2022 expressed an unqualified opinion on the effectiveness of the Company’s
internal control over financial reporting.

Basis for Opinion
These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an
opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the
PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and
the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the
audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement,
whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the
consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such
procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial
statements. Our audits also included evaluating the accounting principles used and significant estimates made by management,
as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a
reasonable basis for our opinion.

Critical Audit Matter
The critical audit matters communicated below are matters arising from the current period audit of the consolidated financial
statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or
disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or
complex judgments. The communication of critical audit matters 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 matters below, providing separate
opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Valuation of customer relationship intangible asset acquired in a business combination

As discussed in Note 6 to the consolidated financial statements, the Company completed its merger (the “Merger”) with
PRA Health Sciences, Inc. ("PRA") on July 1, 2021. The Company estimated the preliminary fair value of the customer
relationship intangible asset to be $3,915.0 million as of the date of the Acquisition.

We identified the evaluation of the preliminary fair value of the customer relationship intangible asset acquired as a
critical audit matter. It required subjective auditor judgement to assess the forecasts of the acquiree’s cash flows, which
include forecasted revenue growth, operating income margins and the customer attrition rate, as well as the discount
rate based on an analysis of the acquiree’s weighted average cost of capital. In addition, specialized skills and
knowledge were needed to test the significant assumptions listed above and used in the discounted cash flow model.

The following are the primary procedures we performed to address this critical audit matter:

We evaluated the design and tested the operating effectiveness of certain internal controls related to the business
combinations process, including controls over the valuation of the customer relationship intangible asset. This included
controls related to the significant assumptions used in the development of the discounted cash flow model, including
forecasted revenue growth, operating income margins, customer attrition rate and the discount rate. We also tested
management's controls over the completeness and accuracy of the data used in the fair value estimate.

103Basis for Opinion (continued)
Critical Audit Matter (continued)

We assessed the reasonableness of the Company’s estimate forecasted revenue growth and operating income margins
by comparing forecasted revenue growth and operating income margins to the acquiree’s historical results and publicly
available industry data. To assess the Company’s customer attrition rates, we compared them to historic customer
attrition rates of the acquiree.

We also involved a valuation professional with specialized skills and knowledge who assisted in:

- evaluating the discount rate by comparing it against discount rates that were independently developed using publicly
available market data of comparable entities

- assessing the fair value of the customer relationship intangible asset acquired using (1) the Company’s forecasted
cash flows and (2) our independently developed discount rates.

Revenue recognition for clinical trial service contracts

As discussed in Note 17 to the consolidated financial statements, the Company recognized revenue of US$5,480.8
million for the year ended 31 December 2021, a significant portion of which relates to clinical trial service revenue. As
discussed in Note 2 to the consolidated financial statements, clinical trial service revenue is recognized over time, using
an input measure, being total project costs (inclusive of third party costs) incurred to date relative to total forecast
project costs, to measure progress towards satisfying the Company’s performance obligation. The transaction price is
based on the contract or latest change order value, adjusted to reflect the estimated realizable contract value.

We identified the evaluation of revenue recognition for clinical trial service revenue as a critical audit matter. Complex
and subjective auditor judgment was required to evaluate the Company’s estimate of total forecast project costs and the
estimated realizable contract values.

The following are the primary procedures we performed to address this critical audit matter:

We evaluated the design and tested the operating effectiveness of certain internal controls related to the revenue
process, including controls over total forecast project costs and estimated realizable contract values.

We tested the total forecast project costs and the realizable contract values for a selection of clinical trial service
contracts, by evaluating:

- Direct costs incurred, both during the year and cumulative over the life of the contracts. We tested the accuracy and
completeness of the direct costs by agreeing to source data

- Third-party costs incurred, both during the year and cumulative over the life of the contracts. We tested the accuracy
and completeness of the third-party costs incurred by agreeing to invoices received

- Findings from interviews with operational personnel of the Company to assess progress to date, the estimate of
remaining costs to be incurred and factors impacting the amount of time and costs to complete the selected contracts,
including an understanding of the nature and complexity of the work to be performed

- Correspondence of amendments to the scope or contract value, if any, between the Company and the customer for
the selected contracts as part of our evaluation of contract progress

- Changes to estimated costs and project margins, including the amount and timing of the changes and

- The reasonableness of the Company’s adjustments from total contract value to arrive at realizable contract value. We
confirmed total contract value with customers and compared the assumptions used to derive the adjustments from total
contract value to realizable contract value to underlying records.

We also evaluated the Company’s methods, assumptions and data used to accurately estimate total forecast project
costs and realizable contract values, by comparing historical estimates developed at contract inception to actual results
for a selection of contracts.

(signed) KPMG

We have served as the Company’s auditor since 1990.

Dublin, Ireland

March 1, 2022

104REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors

ICON plc:

Opinion on Internal Control Over Financial Reporting
We have audited ICON plc and subsidiaries’ (“the Company”) internal control over financial reporting as of December 31, 2021,
based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring
Organizations of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal
control over financial reporting as of December 31, 2021, based on criteria established in Internal Control – Integrated
Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)
(“PCAOB”), the consolidated balance sheets of the Company as of December 31, 2021 and 2020, the related consolidated
statements of operations, comprehensive income, shareholders’ equity and comprehensive income, and cash flows for each of
the years in the three-year period ended December 31, 2021, and the related notes (collectively, the “consolidated financial
statements”), and our report dated March 1, 2022 expressed an unqualified opinion on those consolidated financial statements.

ICON plc acquired PRA Health Sciences, Inc. (“PRA”) during 2021, and management excluded from its assessment of the
effectiveness of the Company’s internal control over financial reporting as of December 31, 2021, PRA’s internal control over
financial reporting associated with 10% of total assets and 38% of total revenues included in the consolidated financial
statements of the Company as of and for the year ended December 31, 2021. Our audit of internal control over financial
reporting of the Company also excluded an evaluation of the internal control over financial reporting of PRA.

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

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

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

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

(signed) KPMG

Dublin, Ireland

March 1, 2022

105ICON plc
CONSOLIDATED BALANCE SHEETS

ASSETS
Current Assets:
Cash and cash equivalents
Available for sale investments (Note 3a)
Accounts receivable, net (Note 18)
Unbilled revenue (Note 18)
Other receivables
Prepayments and other current assets
Income taxes receivable (Note 14)
Total current assets
Other Assets:
Property, plant and equipment, net (Note 7)
Goodwill (Note 4)
Intangible assets (Note 5)
Operating right-of-use assets (Note 23)
Other non-current assets
Non-current income taxes receivable (Note 14)
Deferred tax asset (Note 14)
Equity method investments (Note 3c)
Investments in equity-long term (Note 3b)
Total Assets
LIABILITIES AND SHAREHOLDERS' EQUITY

Current Liabilities:
Accounts payable
Unearned revenue (Note 18)
Other liabilities (Note 8)
Income taxes payable (Note 14)
Current bank credit lines and loan facilities (Note 24)
Total current liabilities
Other Liabilities:
Non-current bank credit lines and loan facilities (Note 24)
Non-current operating lease liabilities (Note 23)
Non-current other liabilities (Note 9)
Non-current government grants
Non-current income taxes payable (Note 14)
Deferred tax liability (Note 14)
Commitments and contingencies (Note 16)
Total Liabilities
Shareholders' Equity:
Ordinary shares par value 6 euro cents per share;
100,000,000 shares authorized, (Note 13)

81,554,683 shares issued and outstanding at December 31, 2021 and
52,788,093 shares issued and outstanding at December 31, 2020.

Additional paid-in capital
Other undenominated capital (Note 13 (a))
Accumulated other comprehensive income (Note 22)
Retained earnings
Total Shareholders’ Equity
Total Liabilities and Shareholders’ Equity

December 31, 2021 December 31, 2020
(in thousands)

752,213 $
1,712
1,342,770
623,121
56,760
114,323
50,299
2,941,198

336,444
9,037,931
4,710,843
198,123
70,557
18,637
48,392
2,373
22,592

17,387,090 $

90,764 $

1,323,961
949,629
59,433
55,150
2,478,937

5,381,162
159,483
41,861
735
172,109
1,085,976
—
9,320,263

6,640
6,733,910
1,134
(90,937)
1,416,080
8,066,827
17,387,090 $

840,305
1,729
715,271
428,684
35,394
53,477
28,118
2,102,978

174,343
936,257
66,460
84,561
20,773
17,230
12,705
4,534
15,765
3,435,606

51,113
660,883
399,769
12,178
—
1,123,943

348,477
60,801
26,366
838
14,539
10,406
—
1,585,370

4,580
617,104
1,134
(35,477)
1,262,895
1,850,236
3,435,606

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

106

ICON plc
CONSOLIDATED STATEMENTS OF OPERATIONS

Year Ended
December 31,

2021

2020

2019

(in thousands, except share and per share data)

5,480,826 $

2,797,288 $

2,805,839

Revenue

Costs and expenses:

Direct costs (excluding depreciation and amortization)

3,972,612

1,979,883

1,974,135

Selling, general and administrative

Depreciation and amortization

Transaction and integration related (Note 6)

Restructuring (Note 15)

Total costs and expenses

Income from operations

Interest income

Interest expense (Note 24)

Income before income tax expense

Income tax expense (Note 14)

Income before share of earnings from equity method investments

Share of equity method investments

585,330

314,987

198,263

31,105

342,449

66,126

(759)

18,089

332,663

61,550

4,085

—

5,102,297

2,405,788

2,372,433

378,529

574

(182,423)

196,680

(41,334)

155,346

(2,161)

391,500

2,724

(13,019)

381,205

(47,875)

433,406

6,859

(13,276)

426,989

(51,133)

333,330

375,856

(366)

—

Net Income

Net income attributable to noncontrolling interest

153,185

332,964

—

(633)

375,856

(1,870)

Net income attributable to the Group

153,185 $

332,331 $

373,986

Net income per Ordinary Share attributable to the Group (Note 27):

Basic

Diluted

2.28 $

2.25 $

6.20 $

6.15 $

6.85

6.79

Weighted average number of ordinary shares outstanding:

Basic (Note 2 (w))

Diluted (Note 2 (w))

67,110,186

52,859,911

53,859,537

68,068,311

53,283,585

54,333,461

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

107

ICON plc
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

Net income

Other comprehensive income, net of tax

Currency translation adjustment

Currency impact of long-term funding

Unrealized capital (loss)/gain - investments

Actuarial gain/(loss) on defined benefit pension plan

Amortization of interest rate hedge

Settlement of interest rate hedge

Total comprehensive income

Less net income attributable to noncontrolling interest

Year Ended
December 31,

2021

2020

2019

(in thousands)

153,185 $

332,964 $

375,856

(60,092)

(525)

—

4,266

113

778

48,129

(1,603)

(231)

(4,138)

(910)

(905)

(1,313)

(2,710)

681

(2,226)

(923)

—

97,725

373,306

—

(633)

369,365

(1,870)

Total comprehensive income attributable to the Group

97,725 $

372,673 $

367,495

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

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111

ICON plc
CONSOLIDATED STATEMENTS OF CASH FLOWS

Cash flows from operating activities:

Net income

Adjustments to reconcile net income to net cash provided by operating activities:

Depreciation and amortization expense

Impairment of long lived assets

Reduction in carrying value of operating right-of-use assets

Loss on equity method investments

Charge/(credit) on interest rate hedge

Amortization of financing costs and debt discount

Stock compensation expense

Loss on extinguishment of debt

Deferred tax (benefit)/expense

Unrealized foreign exchange (gain)/loss

Other non-cash items

Changes in operating assets and liabilities, net of acquired assets and assumed liabilities:

Accounts receivable

Unbilled revenue

Unearned revenue

Other net assets

Net cash provided by operating activities

Cash flows from investing activities:

Purchase of property, plant and equipment

Purchase of subsidiary undertakings (net of cash acquired)

Investment in equity method investments

Loan to equity method investment

Sale of available for sale investments

Purchase of available for sale investments

Purchase of investments in equity - long term

Net cash used in investing activities

Cash flows from financing activities:

Financing costs

Drawdown of credit lines and facilities

Repayment of credit lines and facilities

Purchase of noncontrolling interest

Proceeds from the exercise of equity compensation

Share issue costs

Repurchase of ordinary shares

Share repurchase costs

Settlement of interest rate hedge

Net cash provided by financing activities

Effect of exchange rate movements on cash

Net (decrease)/increase in cash and cash equivalents

Cash and cash equivalents at beginning of year

Cash and cash equivalents at end of year

Year Ended
December 31,

2021

2020

2019

(in thousands)

153,185 $

332,964 $

375,856

314,987

20,037

45,339

2,161

891

12,890

133,844

73,894

(60,616)

(6,054)

3,589

66,126

5,411

28,480

366

(910)

523

26,271

—

927

5,979

(6,949)

61,550

—

30,372

—

(923)

540

26,819

—

(1,537)

590

2,018

113,513

(175,040)

(101,545)

(17,656)

(69,121)

108,259

829,142

(93,750)

(5,914,475)

(2,450)

(10,000)

497

(480)

(5,748)

291,844

(2,209)

(55,790)

86,567

(11,976)

568,035

412,541

(40,885)

(47,931)

(2,450)

—

47,902

—

(38,948)

(131,272)

—

21,686

(9,603)

(3,890)

(3,577)

(3,212)

(6,024,235)

(46,576)

(162,027)

(30,328)

(1,554)

5,905,100

350,000

(877,780)

(350,000)

—

118,589

(853)

(43,923)

13,203

(14)

—

21,645

(13)

—

(175,000)

(146,931)

(140)

(905)

(107)

—

5,114,728

(208,333)

(125,406)

(7,727)

(88,092)

840,305

752,213

6,870

319,996

520,309

840,305

(650)

124,458

395,851

520,309

The accompanying notes are an integral part of these consolidated financial statement

112ICON plc
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

1. Description of business

ICON plc and its subsidiaries ("the Company" or "ICON") is a clinical research organization ("CRO"), providing
outsourced development services on a global basis to the pharmaceutical, biotechnology and medical device industries. We
specialize in the strategic development, management and analysis of programs that support all stages of the clinical
development process from compound selection to Phase I-IV clinical studies. Our mission is to improve the lives of patients by
accelerating the development of our customers' drugs and devices through innovative solutions.

We believe that we are one of a select group of CROs with the expertise and capability to conduct clinical trials in most
major therapeutic areas on a global basis and have the operational flexibility to provide development services on a stand-alone
basis or as part of an integrated "full-service" solution. At December 31, 2021 we had approximately 38,330 employees, in 142
locations in 53 countries. During the year ended December 31, 2021, we derived approximately 47.1%, 46.4% and 6.5% of our
revenue in the United States, Europe and Rest of World, respectively.

ICON’s ordinary shares are traded on the NASDAQ Global Select Market under the symbol “ICLR”.

We began operations in 1990 and have expanded our business through internal growth, together with a number of
strategic acquisitions to enhance our capabilities and expertise in certain areas of the clinical development process. We are
incorporated in Ireland and our principal executive office is located at: South County Business Park, Leopardstown, Dublin 18,
Republic of Ireland. The contact telephone number of this office is +353 1 2912000.

2. Significant accounting policies

The accounting policies noted below were applied in the preparation of the accompanying financial statements of the

Company and are in conformity with accounting principles generally accepted in the United States.

(a) Basis of consolidation

The consolidated financial statements include the financial statements of the Company and all of its subsidiaries. All
significant intercompany profits, transactions and account balances have been eliminated. The results of subsidiary undertakings
acquired in the period are included in the Consolidated Statement of Operations from the date of acquisition.

(b) Use of estimates

The preparation of financial statements in conformity with generally accepted accounting principles in the United States
requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and disclosure
of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses
during the reported period. Actual results could differ from those estimates. The principal management estimates and judgments
used in preparing the financial statements relate to revenue recognition and intangible assets acquired in a business
combination.

The Company earns revenues by providing a number of different services to its customers. These services, which are
integral elements of the clinical development process, include clinical trials management, consulting, contract staffing, data
services and laboratory services. Contracts range in duration from a number of months to several years.

ASC 606 requires application of five steps: (1) identify the contract(s) with a customer; (2) identify the performance
obligation in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in
the contract; and (5) recognize revenue when (or as) the entity satisfies the performance obligation(s), which have been applied
to revenue recognized from each service described below.

Clinical trial service revenue

A clinical trial service is a single performance obligation satisfied over time, i.e. the full-service obligation in respect of a
clinical trial (including those services performed by investigators and other parties) is considered a single performance obligation.
Promises offered to the customer are not distinct within the context of the contract. ICON is the contract principal in respect of
both direct services and in the use of third parties (principally investigator services) that support the clinical research projects.
The transaction price is determined by reference to the contract or change order value (total service revenue and pass-through/
reimbursable expenses) adjusted to reflect a realizable contract value. Revenue is recognized over time as the single
performance obligation is satisfied. The progress towards completion for clinical service contracts is measured based on an input
measure being total project costs incurred (inclusive of pass-through/ reimbursable expenses) at each reporting period as a
percentage of forecasted total project costs.

113

Laboratory services revenue

Revenue is recognized when, or as, obligations under the terms of a contract are satisfied, which occurs when control
of the products or services are transferred to the customer. Revenue for laboratory services is measured as the amount of
consideration we expect to receive in exchange for transferring products or services. Where contracts with customers contain
multiple performance obligations, the transaction price is allocated to each performance obligation based on the estimated
relative selling price of the promised good or service. Service revenue is recognized over time as the services are delivered to
the customer based on the extent of progress towards completion of the performance obligation. The determination of the
methodology to measure progress requires judgment and is based on the nature of services provided. This requires an
assessment of the transfer of value to the customer. The right to invoice measure of progress is generally related to rate per unit
contracts, as the extent of progress towards completion is measured based on discrete service or time-based increments, such
as samples tested or labor hours incurred. Revenue is recorded in the amount invoiced since that amount corresponds to the
value of the Company's performance and the transfer of value to the customer.

Contracting services revenue

The Company has availed of the practical expedient which results in recognition of revenue on a right to invoice basis.
Application of the practical expedient reflects the right to consideration from the customer in an amount that corresponds directly
with the value to the customer of the performance completion to date. This reflects hours performed by contract staff.

Consulting services revenue

Our consulting services contracts represent a single performance obligation satisfied over time. The transaction price is
determined by reference to contract or change order value. Revenue is recognized over time as the performance obligation is
satisfied. The progress towards completion for consulting contracts is measured based on total project inputs (time) at each
reporting period as a percentage of forecasted total project inputs.

Data services revenue

The Company provides data reports and analytics to customers based on agreed-upon specifications, including the
timing of delivery, which is typically either weekly, monthly, or quarterly. If a customer requests more than one type of data report
or series of data reports within a contract, each distinct type of data report is a separate performance obligation. The contracts
provide for the Company to be compensated for the value of each deliverable. The transaction price is determined using list
prices, discount agreements, if any, and negotiations with the customers, and generally includes any out-of-pocket expenses.
Typically, the Company bills in advance of services being provided with the amount being recorded as unearned revenue.

When multiple performance obligations exist, the transaction price is allocated to performance obligations on a relative
standalone selling price basis. In cases where the Company contracts to provide a series of data reports, or in some cases data,
the Company recognizes revenue over time using the “units delivered” output method as the data or reports are delivered.
Expense reimbursements are recorded to revenue as the expenses are incurred as they relate directly to the services performed.

Certain arrangements include upfront customization or consultative services for customers. These arrangements often
include payments based on the achievement of certain contractual milestones. Under these arrangements, the Company
contracts with a customer to carry out a specific study, ultimately resulting in delivery of a custom report or data product. These
arrangements are a single performance obligation given the integrated nature of the service being provided. The Company
typically recognizes revenue under these contracts over time, using an output-based measure, generally time elapsed, to
measure progress and transfer of control of the performance obligation to the customer. Expense reimbursements are recorded
to revenue as the expenses are incurred as they relate directly to the service performed.

Commissions

Incremental costs of obtaining a contract are recognized as an asset on the Consolidated Balance Sheet in respect of
those contracts that exceed one year. Where commission costs relate to contracts that are less than one year, the practical
expedient is applied as the amortization period of the asset which would arise on deferral would be one year or less.

(d) Pass-through/ Reimbursable expenses

Pass through/ Reimbursable expenses comprise investigator payments and certain other costs which are reimbursed

by clients under terms specific to each contract to the investigators. See note 2 (e) Direct costs below.

114(e) Direct costs

Direct costs consist of compensation, associated employee benefits and share-based payments for project-related

employees and other direct project-related costs.

Reimbursable expenses are presented within direct costs. This presentation is to align the presentation of costs with our
assessment that our clinical trial service is a single performance obligation satisfied over time i.e. the full-service obligation is in
respect of a clinical trial (including those services performed by investigators and other parties) is considered a single
performance obligation. Reimbursable expenses are recorded once the activity which forms the basis for the cost has occurred.

Investigator payment costs are recorded and reported reflecting investigator activity over the life of the contract.
Investigator payments are made based on predetermined contractual arrangements. Timing of payments may differ from the
recording and reporting of the expense which is based on activity.

(f) Advertising costs

All costs associated with advertising and promotion are expensed as incurred.

(g) Foreign currencies and translation of subsidiaries

ICON plc's financial statements are prepared in United States dollars. Transactions in currencies other than the
functional currency of the individual entities within the ICON Group are recorded at the rate ruling at the date of the transaction.
Monetary assets and liabilities denominated in currencies other than the functional currency of the individual entities within the
ICON Group are translated into the functional currency of that entity at exchange rates prevailing at the Balance Sheet date.
Adjustments resulting from these translations are charged or credited to income. Amounts charged or credited to the
Consolidated Statements of Operations for the years ended December 31, 2021, December 31, 2020 and December 31, 2019
were as follows:

Year ended
December 31,

2021

2020

2019

(in thousands)

Amounts (credited)/charged

(14,316) $

5,979 $

590

The financial statements of subsidiaries with other functional currencies are translated at period end rates for the
Consolidated Balance Sheets and average rates for the Consolidated Statements of Operations. Translation gains and losses
arising are reported as a movement on accumulated other comprehensive income. Foreign currency transaction gains and
losses are reported in other comprehensive income ("currency impact of long term funding") rather than through income where
the foreign currency transaction is 'long-term investment' in nature i.e. settlement is not planned or anticipated in the foreseeable
future.

115

(h) Disclosure of fair value of financial instruments

Cash, cash equivalents, other receivables, available for sale investments, accounts receivable, accounts payable,
investigator payments and income taxes payable have carrying amounts that approximate fair value due to the short term
maturities of these instruments. Other liabilities' carrying amounts approximate fair value based on net present value of estimated
future cash flows. Debt is measured at historical cost.

Financial instruments are measured in the Consolidated Balance Sheet at amortized cost or fair value using a fair value
hierarchy of valuation inputs. The fair value hierarchy prioritizes the inputs into three levels based on the extent to which inputs
used in measuring fair value are observable in the market. Each fair value measurement is reported in one of three levels, which
is determined by the lowest level input that is significant to the fair value measurement in its entirety. These levels are:

Level 1:

Inputs are based upon unadjusted quoted prices for identical instruments traded in active markets.

Level 2:

Inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or
similar instruments in markets that are not active and model-based valuation techniques for which all significant
assumptions are observable in the market or can be corroborated by observable market data for substantially
the full term of the assets or liabilities.

Level 3:

Inputs are generally unobservable and typically reflect management’s estimates of assumptions that market
participants would use in pricing the asset or liability.

The Company classifies its investments in short term debt or equity investments as available for sale, as it does not
actively trade such securities nor does it intend to hold them to maturity. The fair value of short term investments are represented
by level 1 fair value measurements – quoted prices in active markets for identical assets. The unrealized movements in fair value
are recognized in equity until disposal or sale, at which time, those unrealized movements from prior periods are recognized in
the Consolidated Statement of Operations. Losses other than temporary, which reduce the carrying amount below cost are
recognized in Consolidated Statement of Operations.

(i) Business combinations

The cost of a business combination is measured as the aggregate of the fair values at the date of exchange of assets
given, liabilities incurred or assumed and equity instruments issued in exchange for control. Where a business combination
agreement provides for an adjustment to the cost of the acquisition which is contingent upon future events, the amount of the
estimated adjustment is recognized at the acquisition date at the fair value of the contingent consideration. Any changes to this
estimate outside the measurement period will depend on the classification of the contingent consideration. If the contingent
consideration is classified as equity it shall not be re-measured and the settlement shall be accounted for within equity. If the
contingent consideration is classified as a liability any adjustments will be accounted for through the Consolidated Statement of
Operations or Other Comprehensive Income depending on whether the liability is considered a financial instrument.

The assets, liabilities and contingent liabilities of businesses acquired are measured at their fair values at the date of
acquisition. In the case of a business combination which is completed in stages, the fair values of the identifiable assets,
liabilities and contingent liabilities are determined at the date of each exchange transaction. When the initial accounting for a
business combination is determined provisionally, any subsequent adjustments to the provisional values allocated to the
identifiable assets, liabilities and contingent liabilities are made within twelve months of the acquisition date and presented as
adjustments to goodwill in the reporting period in which the adjustments are determined.

The Company allocates a share of net income to the noncontrolling interest holders based on percentage ownership.

116

(j) Goodwill and Impairment

Goodwill represents the excess of the cost of acquired entities over the net amounts assigned to assets acquired and
liabilities assumed. Goodwill primarily comprises acquired workforce in place which does not qualify for recognition as an asset
apart from goodwill. Goodwill is stated net of any provision for impairment. The Company tests goodwill annually for any
impairments or whenever events occur which may indicate impairment. An impairment charge would be recognized for any
amount by which the carrying amount exceeds the reporting unit's fair value up to the amount of existing goodwill. The Company
performs a qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. No
impairment was recognized as a result of the impairment testing carried out for the years ended December 31, 2021,
December 31, 2020 and December 31, 2019.

(k) Intangible assets

Intangible assets are amortized on a straight line basis over their estimated useful life.

(l) Cash and cash equivalents

Cash and cash equivalents include cash and highly liquid investments with initial maturities of three months or less and

are stated at cost, which approximates market value.

(m) Investments in debt, equity and other

Available for sale investments

The Company classifies short-term investments as available for sale in accordance with the terms of ASC 320
'Investments - Debt and Equity Securities'. Realized gains and losses are determined using specific identification. The
investments are reported at fair value, with unrealized gains or losses reported in a separate component of shareholders' equity.
Any differences between the cost and fair value of the investments are represented by accrued interest and unrealized gains/
losses.

Long term investments

The Company classifies its interests in funds having considered the nature of its investment, the extent of influence over
operating and financial decisions and the availability of readily determinable fair values. The Company determined that the
interests in funds at December 31, 2021 meet the definition of equity securities without readily determinable fair values. The
Company concluded that the interests held at December 31, 2020 and December 31, 2021 qualify for the NAV practical
expedient in ASC 820 'Fair value measurements and disclosures'. Any increases or decreases in fair value are recognized in net
income in the period. These are therefore measured at Level 3 of the fair value hierarchy.

Equity method investments

The Company’s investments that are not consolidated are accounted for under the equity method if the Company
exercises significant influence that is considered to be greater than minor. These investments are classified as equity method
investments on the accompanying Consolidated Balance Sheet. The Company records its pro rata share of the earnings/losses
of these investments in Share of equity method investments in the Consolidated Statement of Operations. The Company reviews
these for impairment whenever events or changes in circumstances indicate that the carrying amounts may not be recoverable.

(n) Accounts receivable, net and unbilled revenue

Accounts receivable and unbilled revenue are recorded at fair value less an estimate of the credit losses expected to be
incurred on the Company's accounts receivable portfolio. The Company's estimate of expected credit losses considers historical
credit loss information that is adjusted, where necessary, for current conditions and reasonable and supportable forecasts.
Historical credit loss experience provides the basis for the estimation of expected credit losses. The Company's receivables and
unbilled services are predominantly due from large and mid-tier pharmaceutical and biotechnology companies that share similar
risk characteristics. The Company monitors their portfolio of receivables and unbilled services for any deterioration in current or
expected credit quality (for example, expected delinquency level), and adjusts the allowance for credit losses as required.

Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit loss expense in the

Consolidated Statement of Operations. Losses are charged against the allowance when management believes the uncollectibility
of a previously provisioned amount is confirmed.

117Accounts receivable factoring

Where the Company enters into an agreement to sell certain portfolios of its accounts receivable balances, the sale is
accounted for in accordance with ASC Topic 860 'Transfers and Servicing' (ASC 860). Agreements which result in true sales of
the transferred receivables, as defined in ASC 860, which occur when receivables are transferred without recourse to ICON, are
excluded from amounts reported in the Consolidated Balance Sheet. Cash proceeds received from such sales are included in
operating cash flows. The associated finance costs are presented as interest expense.

(o) Inventory

Inventory is valued at the lower of cost and net realizable value and after provisions for obsolescence. The cost of
inventories comprises the purchase price and attributable costs, less trade discounts. At December 31, 2021 the carrying value
of inventory, included within prepayments and other current assets on the Consolidated Balance Sheet, was $5.8 million (2020:
$4.8 million).

(p) Property, plant and equipment

Property, plant and equipment is stated at cost less accumulated depreciation. Depreciation of property, plant and

equipment is computed using the straight line method based on the estimated useful lives of the assets as listed below:

Building

Computer equipment and software

Office furniture and fixtures

Laboratory equipment

Motor vehicles

Years

2-8

Leasehold improvements are amortized using the straight line method over the estimated useful life of the asset or the

lease term, whichever is shorter.

(q) Leases

The Company adopted ASC 842 'Leases' (ASC 842), with a date of initial application of January 1, 2019. The lease
accounting policy applied in preparation of the results for the year ended December 31, 2020 and December 31, 2021 therefore
reflect application of ASC 842. The Company adopted the standard using the cumulative-effect adjustment approach. Under this
transition method, the Company applied the ASC 842 as at the date of initial application (i.e. January 1, 2019), without
restatement of comparative period amounts. The cumulative effect of applying the standard is recorded as an adjustment to the
opening consolidated balance sheet as at the date of initial application.

ASC 842 requires lessees to recognize the rights and obligations resulting from virtually all leases on the Consolidated

Balance Sheet as right-of-use (ROU) assets with corresponding lease liabilities.

The most significant impact of application of the standard for the Company related to the recognition of right-of-use
assets and lease liabilities on the Consolidated Balance Sheet for operating leases for certain property, vehicles and equipment.
Prior to application of ASC 842, costs in respect of operating leases were charged to the Consolidated Statements of Operations
on a straight-line basis over the lease term.

Pursuant to certain practical expedients available as part of adopting ASC 842, ICON did not reassess whether existing
or expired supplier contracts are or contain leases, the classification of existing or expired leases, or whether unamortized initial
direct costs meet the new definition of initial direct costs under ASC 842. Additionally, the Company elected to use hindsight in
determining the lease term and in assessing impairment of ROU assets, if any.

The Company determines if an arrangement is a lease at inception. Finance leases, if any, are depreciated on the same
basis as property, plant and equipment. At December 31, 2021 and December 31, 2020, the Company did not account for any
leases as finance leases.

118
Operating leases are included in operating right-of-use assets, other liabilities and non-current operating lease liabilities
on our Consolidated Balance Sheet with the lease charge recognized on a straight-line basis over the lease term. ROU assets
and lease liabilities are recognized based on the present value of future minimum lease payments over the lease term at
commencement date or date of transition. Our lease terms may also include options to extend or terminate. The Company
actively reviews options to extend or terminate leases and adjusts the ROU asset and lease liability when it is reasonably certain
the option will be exercised. The ROU asset is adjusted for any prepayments made at the date of commencement and any initial
direct costs incurred. As most of the Company's leases do not provide an implicit rate, the discount rate used is based on the
rate of traded corporate bonds available at the commencement date adjusted for country risk, liquidity and lease term.

The Company accounts for lease and non-lease components separately with lease components flowing through the

Consolidated Balance Sheet and non-lease components expensed directly to the Consolidated Statements of Operations.

Leasehold improvements are amortized over the shorter of the depreciable lives of the corresponding fixed assets or
the lease term including any applicable renewals. Certain property leases include variable lease payments resulting from periodic
rent increases based on an index which cannot be reasonably estimated at the lease commencement date. These costs are
expensed as incurred on the Consolidated Statements of Operations.

In some cases, the Company enters into sublease agreements and becomes both a lessee and a lessor for the same
underlying asset. Although subleases are accounted for separately from the lease they relate to, subleases are accounted for in
the same way as other leases.

(r) Income taxes

The Company applies the asset and liability method of accounting for income taxes. Under the asset and liability
method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the
financial statement carrying amount of existing assets and liabilities and their respective tax bases and for operating loss and tax
credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable
income in the years in which these temporary differences are expected to be recovered or settled. The effect on deferred tax
assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax
assets are reduced by a valuation allowance to the amount that is more likely than not to be realized. The Company recognizes
the effect of income tax positions only if those positions will more likely than not be sustained. Recognized income tax positions
are measured at the largest amount of tax benefit that is greater than 50 percent likely of being realized upon settlement. Interest
and penalties related to income taxes are included in income tax expense and classified with the related liability on the
Consolidated Balance Sheet. The Company accounts for the impact of GILTI (“global intangible low-taxed income”) in the period
it arises and has therefore not provided for deferred taxes in respect of this item.

(s) Government grants

Government grants received relating to capital expenditures are shown by deducting the grant from the asset's carrying
amount and crediting them to income on a basis consistent with the depreciation policy of the relevant assets. Grants relating to
categories of operating expenditures are shown as deferred income and credited to income in the period in which the
expenditure to which they relate is charged.

Under the grant agreements amounts received may become repayable in full should certain circumstances specified
within the grant agreements occur, including downsizing by the Company, disposing of the related assets, ceasing to carry on its
business or the appointment of a receiver over any of its assets. The Company has not recognized any loss contingency having
assessed as remote the likelihood of these events arising.

(t) Research and development credits

Research and development credits are available to the Company under the tax laws in certain jurisdictions, based on
qualifying research and development spend as defined under those tax laws. Research and development credits are generally
recognized as a reduction of income tax expense. However, certain tax jurisdictions provide refundable credits that are not wholly
dependent on the Company's ongoing income tax status or income tax position. In these circumstances the benefit of these
credits is not recorded as a reduction to income tax expense, but rather as a reduction of operating expenditure.

119(u) Pension costs

The Company contributes to defined contribution plans covering all eligible employees. The Company contributes to

these plans based upon various fixed percentages of employee compensation and such contributions are expensed as incurred.

The Company operates, through certain subsidiaries, a defined benefit plan for certain employees located in the United
Kingdom and Switzerland. The Company accounts for the costs of these plans in accordance with ASC 715-30 'Defined Benefit
Plans – Pension'. These plans are presented in accordance with the requirements of ASC 715-60 'Defined Benefit Plans – Other
Postretirement'. The Company also maintains various retirement plans across the Group, many of which are required by local
employment laws.

(v) Redeemable noncontrolling interests and equity

The Company acquired a majority ownership interest in MeDiNova during the year ended December 31, 2019. Included
in the purchase agreement were put and call option arrangements with the noncontrolling interest holders that required (put
option) or enabled (call option) the Company to purchase the remaining minority ownership at a future date. The option was
accounted for as temporary equity, which is presented separately as redeemable noncontrolling interest on the Consolidated
Balance Sheet. This classification reflects the assessment that the instruments are contingently redeemable in accordance with
ASC 480-10-S99 'Distinguishing Liabilities from Equity'. On March 9, 2020, ICON exercised its option to call the remaining
shares and took 100% ownership of MeDiNova.

Redeemable noncontrolling interests are accreted to their redemption value over the period from the date of issuance to
the first date on which the option is exercisable. The change in the option's redemption value is recorded against retained
earnings. In a computation of earnings per share, the accretion of redeemable noncontrolling interests to their redemption value
is a reduction of net income attributable to the Group. Basic and diluted net income per ordinary share attributable to the Group
includes the adjustment to reflect the accretion of the noncontrolling interest to its redemption value until the redemption of the
noncontrolling interest on March 9, 2020.

(w) Net income per ordinary share

Basic net income per ordinary share attributable to the Company has been computed by dividing net income available
to ordinary shareholders by the weighted average number of ordinary shares outstanding during the period. Diluted net income
per ordinary share is computed by adjusting the weighted average number of ordinary shares outstanding during the period for
all potentially dilutive ordinary shares outstanding during the period and adjusting net income for any changes in income or loss
that would result from the conversion of such potential ordinary shares. There is no difference in net income used for basic and
diluted net income per ordinary share. Basic and diluted net income per ordinary share attributable to the Company includes the
adjustment to reflect the accretion of the noncontrolling interest in MeDiNova to its redemption value (see note 27 - Net income
per ordinary share).

(x) Share-based compensation

The Company accounts for its share options, Restricted Share Units ("RSUs") and Performance Share Units ("PSUs")
in accordance with the provisions of ASC 718 'Compensation – Stock Compensation'. Share-based compensation expense for
equity-settled awards made to employees and directors is measured and recognized based on estimated grant date fair values.
These equity-settled awards include employee share options, RSUs and PSUs.

Share-based compensation expense for share options awarded to employees and directors is estimated at the grant
date based on each option's fair value as calculated using the Black-Scholes option-pricing model. Share-based compensation
for RSUs and PSUs awarded to employees and directors is calculated based on the market value of the Company's shares on
the date of award of the RSUs and PSUs. The value of awards expected to vest is recognized as an expense over the requisite
service periods. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs
materially from original estimates.

Estimating the grant date fair value of share options as of the grant date using an option-pricing model, such as the
Black-Scholes model, is affected by the Company's share price as well as assumptions regarding a number of complex
variables. These variables include, but are not limited to, the expected share price volatility over the term of the awards, risk-free
interest rates and the expected term of the awards.

Liability classified awards are measured at the fair value of the award on the grant date and remeasured at each

reporting period at fair value until the award is settled.

120Replacement awards

In connection with the completion of the Merger, the company issued replacement awards to the holders of PRA equity
awards on July 1, 2021. An exchange of share-based compensation awards in a business combination is treated as a
modification under ASC 718. The replacement awards and the original acquiree awards are measured at fair value at the
acquisition date and calculated using the fair-value-based measurement principles in ASC 718. Amounts attributable to pre-
combination vesting are accounted for as part of the consideration transferred for the acquiree. Amounts attributable to post-
combination vesting are accounted for separate from the business combination and are recognized as compensation cost in the
post-combination period.

(y) Impairment of long-lived assets

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying
amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the
carrying amount of the asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are
considered to be impaired, the impairment to be recognized is measured at the amount by which the carrying amount of the
asset exceeds the fair value of the asset. Assets to be disposed of are reported at the lower of the carrying amount of the asset
or fair value less selling costs.

(z) Derivative financial instruments

We enter into transactions in the normal course of business using various financial instruments in order to hedge
against exposure to fluctuating exchange and interest rates. We use derivative financial instruments to reduce exposure to
fluctuations in interest rates. A derivative is a financial instrument or other contract whose value changes in response to some
underlying variable, which has an initial net investment smaller than would be required for other instruments that have a similar
response to the variable and that will be settled at a future date. We do not enter into derivative financial instruments for trading
or speculative purposes. We did not hold any interest rate swap contracts or forward currency contracts at December 31, 2021 or
December 31, 2020.

We use derivative financial instruments to reduce exposure to fluctuations in foreign exchange rates. During the years
ended December 31, 2019 and December 31, 2020, we entered into forward currency contracts in respect of identified exposure
arising from euro payments. All contracts expired during the year in which the contract was entered into. No forward currency
contracts were entered into during the year ended December 31, 2021.

Our accounting policies for derivative financial instruments are based on whether they meet the criteria for designation
as cash flow or fair value hedges. A designated hedge of the exposure to variability in the future cash flows of an asset or a
liability, or of a forecast transaction, is referred to as a cash flow hedge. A designated hedge of the exposure to changes in fair
value of an asset or a liability is referred to as a fair value hedge. The criterion for designating a derivative as a hedge includes
the assessment of the instrument's effectiveness in risk reduction, matching of the derivative instrument to its underlying
transaction and the probability that the underlying transaction will occur. For derivatives with cash flow hedge accounting
designation, we report the gain or loss from the effective portion of the hedge as a component of Other Comprehensive Income
and reclassify it into earnings in the same period or periods in which the hedged transaction affects earnings and within the same
Consolidated Statement of Operations line item as the impact of the hedged transaction. For derivatives with fair value hedge
accounting designation, we recognize gains or losses from the change in fair value of these derivatives, as well as the offsetting
change in the fair value of the underlying hedged item, in earnings. Fair value gains and losses arising on derivative financial
instruments not qualifying for hedge accounting are reported in our Consolidated Statement of Operations.

The company has entered into certain put and call arrangements to purchase equity in unconsolidated entities at a

future date. These arrangements are accounted for at fair value at the balance sheet date.

(aa) Debt issuance costs

Debt issuance costs relating to the Company’s long-term debt are recorded as a direct reduction of long-term debt;
these costs are deferred and amortized to interest expense using the effective interest method, over the respective terms of the
related debt. Debt issuance costs relating to the Company’s revolving credit facilities are recorded as an asset; these costs are
deferred and amortized to interest expense using the straight-line method. Early repayment of debt facilities can result in
modification of the debt and the acceleration of the amortization of debt issuance costs.

(ab) Transaction and integration-related expenses

Transaction and integration-related expenses are the incremental costs directly attributable to the completion and
integration activities associated with the Company’s recent acquisitions. The costs consist of investment banking fees, advisory
costs, retention agreements with employees, accelerated share compensation charges, contingent consideration valuation
adjustments and ongoing integration activities. The Company accounts for these transaction and integration-related costs as
expenses in the period in which the costs are incurred and the services are received.

121(ac) Restructuring

Restructuring charges reflect certain one-time costs arising from reorganization programs announced by Company
management. These programs generally result in asset impairments and workforce reductions in order to optimize the
Company’s structure and facilitate improved long-term performance. Impairment charges are taken when the value-in-use of the
asset is less than the asset’s carrying value. Workforce related charges are taken when an approved reorganization program is
communicated to the relevant employee groups.

(ad) Reclassifications

Certain prior period amounts in the consolidated financial statements and accompanying notes have been reclassified
to conform to the current period’s presentation. Most notably, the Company has presented transaction and integration-related
expenses as a separate line in the Consolidated Statement of Operations and reclassified certain costs incurred in the years
ended December 31, 2020 and December 31, 2019 within this line. These costs consist of transaction and integration-related
expenses and contingent consideration valuation adjustments related to ICON's prior period acquisitions. These costs were
previously presented in the selling, general and administrative expenses but have been reclassified to transaction and
integration-related expenses to conform to the current period’s presentation.

3. Investments

(a)

Available for sale investments

Available for sale investments at start of year

Purchases

Sales and maturities

Realized gain on sale of short term investments

Unrealized capital loss – investments

December 31,
2021

December 31,
2020

(in thousands)

1,729 $

49,628

480

(497)

—

(47,902)

234

(231)

Available for sale investments at end of year

1,712 $

1,729

The Company classifies its investment in short term investments as available for sale. Short term investments comprise
highly liquid investments with maturities of greater than three months and minimum "A-" rated fixed term deposits. Short term
investments at December 31, 2021 have an average maturity of 2.7 years compared to 3.4 years at December 31, 2020.

The following table represents our available for sale short term investments by major security type as of December 31,

2021:

Term deposits

Total ($ in millions)

Maturity by period

Cost
Total

Fair Value
Total

Less than 1
year

1.7 $

(in millions)

1.7 $

0.5 $

1 to 5
years

1.2

The contractual maturity of certain investments in the portfolio is greater than 12 months; however, classification as
short-term investments reflects the Company practice and intention in respect of these investments. The Company recognizes
the unrealized losses at fair value in equity as these unrealized losses on short term investments have been considered as
temporary.

122

(b)

Investments in equity - long term

The Company entered into subscription agreements with a number of funds. Capital totaling $16.9 million had been
advanced under the terms of the subscription agreements at December 31, 2021 (December 31, 2020: $13.3 million). The
Company determined that the interests in the funds meet the definition of equity securities without readily determinable fair
values. The Company concluded that the interests held at December 31, 2021 qualify for the NAV practical expedient in ASC 820
'Fair value measurements and disclosures'. There was an increase in fair value of $3.2 million (December 31, 2020: $2.5 million)
recognized in net income during the year bringing the carrying value of the subscriptions to $22.6 million at December 31, 2021
(December 31, 2020: $15.8 million). At December 31, 2021, the Company had committed to future investments of $17.4 million
in respect of these funds.

(c)

Equity method investments

The Company has invested $4.9 million to obtain a 49% interest in the voting share capital of Oncacare. The
Company’s investment in Oncacare is accounted for under the equity method due to the Company's ability to exercise significant
influence over Oncacare that is considered to be greater than minor. The Company records its pro rata share of the earnings/
losses of this investment in 'Share of equity method investments' in the Consolidated Statement of Operations. See additional
details in note 2 - Significant accounting policies.

The majority investor has the right to sell the 51% majority voting share capital exclusively to the Company in an
eighteen month period, commencing January 1, 2023 and ICON also has the right to acquire the 51% majority voting share
capital from August 1, 2025.

The following table represents our equity method investments at December 31, 2021:

Oncacare Limited

49 % $

2,373 $

4,534

Ownership
Percentage

Carrying Value

December 31, 2021

December 31, 2020

(in thousands)

The Company has recorded a loss of $2.2 million representing its pro rata share of the losses in Oncacare since
December 31, 2020. From the date of initial investment to year ended December 31, 2020, the Company recorded a loss of
$0.4 million. During the year ended December 31, 2021, the Company provided a loan of $10 million to Oncacare in order to
fund the continued development of the business operations. The loan accrues annual interest at 1.6% and the loan is repayable
on June 30, 2025. Oncacare continues to perform in line with expectations.

4. Goodwill

Opening goodwill

Current year acquisitions (note 6)

Prior period acquisition

Foreign exchange movement

Closing goodwill

December 31,
2021

December 31,
2020

(in thousands)

936,257 $

883,170

8,120,006

27,191

—

123

(18,332)

25,773

9,037,931 $

936,257

The Company has made a number of strategic acquisitions since inception to enhance its capabilities and experience in
certain areas of the clinical development process. Goodwill arising on acquisition represents the excess of the cost of acquired
entities over the net amounts assigned to assets acquired and liabilities assumed.

The Company tests goodwill annually for impairment or whenever events occur which may indicate impairment. The
results of the Company's goodwill impairment testing assessed at September 30, 2021 during the year ended December 31,
2021 provided no evidence of impairment and indicated the existence of sufficient headroom such that a reasonably possible
change to the key assumptions used would be unlikely to result in an impairment of the related goodwill.

123

5. Intangible Assets

Cost
Customer relationships

Order backlog

Trade names & brands

Patient database

Technology assets

Total cost

Accumulated amortization

Net book value

December 31,
2021

December 31,
2020

(in thousands)

4,056,642 $

144,251

528,022

204,685

170,525

121,507

39,269

2,766

2,552

11,173

5,081,381

200,011

(370,538)

(133,551)

4,710,843 $

66,460

On July 1, 2021, ICON plc announced the completion of its Merger with PRA Health Sciences, Inc. The Merger resulted
in the recognition of Customer relationships of $3,915.0 million, Order backlog of $490.0 million, Trade names of $202.0 million,
Patient database of $168.0 million and Technology assets of $111.0 million. These assets will be amortized over their expected
useful lives of between 3 and 23 years. The valuation and useful lives of these assets remains provisional at December 31,
2021. In total, $223.5 million has been amortized in the period since the date of acquisition.

On January 22, 2020 a subsidiary of the Company, ICON Investments Limited acquired 100% of the equity share
capital of the MedPass Group. MedPass is the leading European medical device CRO, regulatory and reimbursement
consultancy, that specializes in medical device development and market access. The acquisition of MedPass further enhances
ICON’s Medical Device and Diagnostic Research services, through the addition of new regulatory and clinical capabilities in
Europe. On acquisition, certain customer relationships and order backlog identified, which were valued at $11.7 million and
$2.9 million respectively, were recognized and are being amortized over approximately 13 years and 3 years, the estimated
period of benefit. In total, $2.0 million has been amortized in the period to December 31, 2021 relating to the acquisition.

Future intangible asset amortization expense for the years ended December 31, 2022 to December 31, 2026 is as

follows:

2022

2023

2024

2025

2026

Year Ended
December 31,
2021

(in thousands)

456,973

454,235

338,463

222,191

208,175

1,680,037

6. Business combinations

PRA Health Sciences, Inc. - Merger Completion

On July 1, 2021 (the "Merger Date"), the Company completed the Acquisition of PRA by means of a merger whereby
Indigo Merger Sub, Inc., a Delaware corporation and subsidiary of ICON, merged with and into PRA Health Sciences, Inc., the
parent of the PRA Health Sciences Group ("the Acquisition" and "the Merger"). The combined Group has retained the name
ICON and brought together approximately 38,000 (as at the Merger date) employees across the globe, creating one of the
world’s most advanced healthcare intelligence and clinical research organization. The Merger was accounted for as a business
combination using the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations.

124

Upon completion of the Merger, pursuant to the terms of the Merger Agreement, PRA became a wholly owned
subsidiary of the ICON Group. Under the terms of the Merger, PRA shareholders received per share $80 in cash and 0.4125
shares of ICON stock. The trading of PRA common stock on NASDAQ was suspended prior to market open on July 1, 2021.

In the year ended December 31, 2021, the Company incurred $198.3 million of Merger-related expenses which were
accounted for separately from the business combination and expensed as incurred within the “Transaction and integration
related” line item of the Consolidated Statement of Operations. These costs consist primarily of investment banker fees, advisory
fees, legal costs, accounting and consulting fees, share-based compensation expense, and employee retention bonuses.
Included in the $198.3 million of transaction and integration costs are acquisition related costs (as defined by ASC 805) of
$57.1 million. These costs include finders fees; advisory, legal, accounting, valuation, and other professional or consulting fees.

The Company also incurred approximately $86.7 million of Merger-related financing fees which are included in the
“Interest expense” line item in the Consolidated Statement of Operations for the year ended December 31, 2021. The Company
deferred $76.2 million of financing costs incurred as a result of the Senior Secured Credit Facility and Senior Secured Notes.
These costs will be amortized over the term of the related debt.

The purchase accounting associated with the PRA Merger remains ongoing and the Company continues to review the

acquisition balance sheet. The Company expects to conclude the purchase accounting exercise by June 30, 2022.

The Merger Date fair value of the consideration transferred consisted of the following:

Fair value of cash consideration

Fair value of ordinary shares issued to acquiree stockholders

Fair value of replacement share-based awards issued to acquiree employees

Repayment of term loan obligations and accrued interest *

(in thousands)

5,308,646

5,658,126

209,399

865,800

12,041,971

* This represents the portion of PRA debt paid by ICON. PRA also paid $401.6 million from available cash to settle debt
obligations that existed at the Merger Date.

125

The following table summarizes the preliminary allocation of the consideration transferred based on management’s
estimates of Merger Date fair values of assets acquired and liabilities assumed, with the excess of the purchase price over the
estimated fair values of the identifiable net assets acquired recorded as goodwill:

Cash and cash equivalents

Accounts receivable and unbilled revenue

Other current assets

Fixed assets

Operating lease right-of-use assets

Goodwill *

Intangible assets

Deferred tax assets

Other assets

Accounts payable

Accrued expenses and other current liabilities

Current portion of operating lease liabilities

Unearned revenue

Non-current portion of operating lease liabilities

Deferred tax liabilities

Other non-current liabilities

Net assets acquired

July 1,

2021

(in thousands)

259,971

934,308

125,156

156,851

177,345

8,120,006

4,886,000

28,099

35,391

(50,259)

(380,342)

(36,625)

(739,278)

(144,403)

(1,126,952)

(203,297)

12,041,971

* The goodwill in connection with the Merger is primarily attributable to the assembled workforce of PRA and the expected
synergies of the Merger. None of the goodwill recognized is expected to be deductible for income tax purposes.

The following table summarizes the preliminary estimates of the fair value of identified intangible assets and their

respective useful lives as of the Merger Date (in thousands, except for estimated useful lives):

Estimated Fair Value

Estimated Useful Life

Customer relationships

Order backlog

Trade names

Patient database

Technology assets

3,915,000

490,000

202,000

168,000

111,000

4,886,000

23 years

3 years

7 years

5 years

Since July 1, 2021, PRA has earned revenue of $2,053.4 million and pre-tax net income of $169.9 million in the six months
ended December 31, 2021.

126

Unaudited Supplemental Pro Forma Information

The following pro forma financial information was derived from the historical financial statements of the Company and
PRA and presents the combined results of operations as if the Merger had occurred on January 1, 2020. The pro forma financial
information is presented for comparative purposes only and is not necessarily indicative of the results that would have actually
occurred had the Merger been completed on January 1, 2020. In addition, the pro forma financial information does not give effect
to any anticipated cost savings, operating efficiencies or other synergies that may result from the Merger, or any estimated costs
that have been or will be incurred by the Company to integrate the assets and operations of PRA. Consequently, actual future
results of the Company will differ from the pro forma financial information presented below:

Revenue
Net income/(loss)

Year Ended
December 31
2021

Year ended
December 31
2020

(in thousands, except per share data)

$
$

7,462,000 $
340,942 $

5,980,653
(149,658)

The pro forma adjustments primarily relate to the amortization of acquired intangible assets, interest expense and
amortization of deferred financing costs related to the new financing arrangements. In addition, the pro forma net income for the
year ended December 31, 2021 was adjusted to exclude certain Merger-related nonrecurring adjustments; these adjustments
were included in the year ended December 31, 2020 giving effect to the Merger as if it had occurred on January 1, 2020. The
nonrecurring Merger-related adjustments include transaction costs, share-based compensation expense related to the
acceleration of share-based compensation awards and replacement share-based awards, and financing fees. The Merger-
related adjustments were tax effected using the rates applicable to the jurisdictions where they arose.

Acquisitions – MedPass Group ("MedPass")

On January 22, 2020 a subsidiary of the Company, ICON Investments Limited acquired 100% of the equity share
capital of the MedPass Group. MedPass is the leading European medical device CRO, regulatory and reimbursement
consultancy, that specializes in medical device development and market access. The acquisition of MedPass further enhances
ICON’s Medical Device and Diagnostic Research services, through the addition of new regulatory and clinical capabilities in
Europe. The integration of MedPass’s services brings noted expertise in complex class 3 medical devices, interventional
cardiology and structural heart devices. Accounting for the acquisition of MedPass was finalized in the period ended December
31, 2020.

The acquisition of MedPass has been accounted for as a business combination in accordance with ASC 805 'Business
Combinations'. The Company has made an assessment of the fair value of assets acquired and liabilities assumed as at that
date. The following table summarizes the Company’s fair values of the assets acquired and liabilities assumed:

127
Cash & cash equivalents

Property, plant and equipment

Operating right of use assets

Goodwill *

Customer relationships

Order backlog

Accounts receivable

Prepayments and other current assets

Accounts payable

Unearned revenue

Other liabilities

Current lease liabilities

Non-current lease liabilities

Non-current deferred tax liability

Net assets acquired

Cash outflows

Working capital adjustment paid

Contingent consideration **

Total consideration

January 22,
2020

(in thousands)

10,170

539

27,191

11,725

2,883

3,033

158

(368)

(989)

(2,202)

(219)

(320)

(4,090)

47,556

46,992

564

—

47,556

* Goodwill represents the acquisition of an established workforce that specializes in medical device development and market
access. None of the goodwill recognized is expected to be deductible for income tax purposes.

** The fair value of the contingent consideration was estimated at the date of acquisition as $Nil. Depending on performance of
MedPass for the 12 month period ended December 31, 2020, the total consideration could have increased by a maximum of
$6.7 million in contingent consideration. In January 2021, the contingent consideration was finalized and a value of $Nil was
payable.

In finalizing the acquisition of MedPass in the 12 month period from acquisition, fair value adjustments were made
which resulted in an increase in accounts receivable ($0.2 million) and unearned revenue ($0.8 million) and a decrease in
operating right of use assets ($0.8 million), other liabilities ($0.8 million), current lease liabilities ($0.1 million), non-current lease
liabilities ($0.7 million) and non-current deferred tax liability ($0.6 million). Customer relationship and order backlog assets were
also finalized.

Since January 22, 2020, MedPass earned revenue of $13.2 million and net income of $2.5 million in the year ended
December 31, 2020. The proforma effect of the MedPass acquisition if completed on January 1, 2019 would have resulted in
revenue, net income and earnings per share for the fiscal years ended December 31, 2020 and December 31, 2019 as follows:

Revenue
Net income

Year Ended
2020

2019

(in thousands)
$ 2,798,180 $ 2,820,796
377,485
$

332,521 $

128

7. Property, Plant and Equipment, net

Cost

Land

Building

Computer equipment and software

Office furniture and fixtures

Laboratory equipment

Leasehold improvements

Motor vehicles

Less accumulated depreciation and asset write offs

Property, plant and equipment (net)

December 31,
2021

December 31,
2020

(in thousands)

3,724 $

82,017

3,724

90,139

506,322

440,930

107,507

29,210

70,123

91,933

44,567

32,261

160

798,968

703,714

(462,524)

(529,371)

336,444 $

174,343

The Company regularly updates its register of property, plant and equipment and during the year ended December 31, 2021 and
the year ended December 31, 2020, certain fully depreciated assets were written off as they were no longer used in the
Company.

8. Other Liabilities

General trade and overhead liabilities*

Personnel related liabilities

Operating lease liabilities (note 23)

Facility related liabilities

Other liabilities

Restructuring liabilities (note 15)

Short term government grants

December 31,
2021

December 31,
2020

(in thousands)

459,814 $

188,638

413,185

161,363

49,949

12,055

7,204

7,377

24,334

9,441

8,726

7,219

949,629 $

399,769

*includes amounts due to third parties in respect of accrued reimbursable investigator expenses of $323.6 million at
December 31, 2021 and $138.2 million at December 31, 2020.

9. Non-Current Other Liabilities

Defined benefit pension obligations, net (note 10)

Other non-current liabilities

December 31,
2021

December 31,
2020

(in thousands)

16,262 $

25,599

41,861 $

10,395

15,971

26,366

129

10. Employee Benefits

Defined contribution or profit sharing style plans ("the Plans") are offered globally in a number of countries. In some
cases, these plans are required by local laws or regulations. Certain Company employees are eligible to participate in the Plans
and participants in the Plans may elect to defer a portion of their pre-tax earnings into a pension plan, which is run by an
independent party. The Company matches participant's contributions up to certain levels of the participant's annual
compensation. Contributions to the plan are recorded as an expense in the selling, general and administrative line in the
Consolidated Statement of Operations.

The Company's United States operations maintain retirement plans (the "U.S. Plans") that qualify as a deferred salary
arrangement under Section 401(k) of the Internal Revenue Code. Participants in the U.S. Plans may elect to defer a portion of
their earnings, up to the Internal Revenue Service annual contribution limit. The Company matches participant's contributions at
varying amounts, subject to a maximum of 4.5% of the participant's annual compensation. Contributions to this U.S. Plan are
recorded, in the year contributed, as an expense in the Consolidated Statement of Operations. Contributions for the years ended
December 31, 2021, December 31, 2020 and December 31, 2019 were $23.7 million, $17.0 million and $16.5 million
respectively.

The Company maintains various retirement plans across the Group, many of which are required by local employment
laws. In addition to the specific defined benefit schemes shown separately below, the Company maintains several other
retirement plans with a total net obligation associated with these schemes of $8.0 million. This balance has been recorded in
non-current other liabilities on the Consolidated Balance Sheet.

ICON Development Solutions Limited pension plan

One of the Company's subsidiaries, ICON Development Solutions Limited, operates a defined benefit pension plan in
the United Kingdom for its employees. The plan is managed externally and the related pension costs and liabilities are assessed
in accordance with the advice of a professionally qualified actuary. Plan assets at December 31, 2021, December 31, 2020 and
December 31, 2019, consist of units held in independently administered funds. The pension costs of this plan are presented in
the following tables in accordance with the requirements of ASC 715-60 'Defined Benefit Plans – Other Postretirement'. The plan
has been closed to new entrants with effect from July 1, 2003.

Funded status

Projected benefit obligation

Fair value of plan assets

Funded status

Non-current other liabilities (note 9)

Change in benefit obligation

Benefit obligation at beginning of year

Service cost

Interest cost

Plan participants' contributions

Benefits paid

Actuarial (gain)/loss

Foreign currency exchange rate changes

December 31,
2021

December 31,
2020

(in thousands)

(41,813) $

(43,988)

36,198

(5,615) $

34,612

(9,376)

December 31,
2021

December 31,
2020

(in thousands)

43,988 $

37,036

134

665

(489)

(2,097)

(411)

100

746

(724)

5,294

1,514

Benefit obligation at end of year

41,813 $

43,988

130

Change in plan assets

Fair value of plan assets at beginning of year

Actual return on plan assets

Employer contributions

Plan participants' contributions

Benefits paid

Foreign currency exchange rate changes

Fair value of plan assets at end of year

December 31,
2021

December 31,
2020

(in thousands)

34,612 $

2,347

(489)

(386)

36,198 $

32,016

2,092

109

(724)

1,097

34,612

The fair values of the assets above do not include any of the Company's own financial instruments, property occupied

by, or other assets used by, the Company.

The following amounts were recorded in the Consolidated Statement of Operations as components of the net periodic

benefit cost:

Service cost

Interest cost

Expected return on plan assets

Amortization of net loss

Net periodic benefit cost

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

134 $

665

100 $

746

(1,171)

(1,214)

625

253 $

160

(208) $

107

867

(574)

467

The following assumptions were used at the commencement of the year in determining the net periodic pension benefit

cost for the years ended December 31, 2021, December 31, 2020 and December 31, 2019:

Discount rate

Rate of compensation increase

Expected rate of return on plan assets

Other comprehensive income

Actuarial (gain)/loss - benefit obligation

Actuarial gain – plan assets

Actuarial loss recognized in net periodic benefit cost

Total

December 31,
2021

December 31,
2020

December 31,
2019

1.5 %

3.4 %

2.1 %

3.3 %

4.0 %

2.9 %

3.7 %

2.1 %

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

(2,097) $

5,294 $

(1,176)

(625)

(878)

(160)

(3,898) $

4,256 $

4,756

(2,930)

(67)

1,759

The estimated net loss and prior service cost for the defined benefit pension plan that will be amortized from

accumulated other comprehensive income into net periodic benefit cost over the next year are $0.2 million and $Nil respectively.

131

Benefit Obligation

The following assumptions were used in determining the benefit obligation at December 31, 2021 and December 31,

2020:

Discount rate

Rate of compensation increase

December 31,
2021

December 31,
2020

1.8 %

3.7 %

1.5 %

3.4 %

A single discount rate is used which, when used to discount the projected benefit cash flows underlying a pension

scheme with a 26 year duration, gives the same result as a full AA corporate bond yield curve.

Actuarial gains on the benefit obligation during 2021 resulted from changes in the assumptions compared to those
adopted at December 2020. Changes in the assumptions reflect the changes in market conditions from December 2020 to
December 2021 and the actuarial gain is primarily due to the change in the discount rate.

Plan Assets

The assets of the scheme are held on an investment platform with Mobius which invests in a number of investment
funds with Legal & General, Stone Harbor, Ninety-One and Barings. The overall investment strategy is that approximately 20% of
investments are in senior secured loans, 18% in corporate bonds, 19% in high yield bonds and multi-asset credit fund and 24%
in world equities respectively. There is no self-investment in employer related assets. The expected long-term rate of return on
assets at December 31, 2021 of 3.8% was calculated as the value of the fund after application of a market value reduction factor.
The expected long term rates of return on different asset classes are as follows:

Expected long-term return per annum
Corporate Bonds (including 50% high yield bonds)
Equities
Secured Loans and Multi Asset Credit

December 31, 2021 December 31, 2020
2.8 %
5.2 %
3.0 %

2.8 %
5.5 %
3.0 %

The long-term expected rate of return on cash is determined by reference to traditional corporate bond rates at the
latest Balance Sheet date. The long-term expected returns on traditional corporate and government bonds are determined by
reference to corporate bond yields and gilt yields respectively at the Balance Sheet date. The long-term expected returns on
equities are based on the rate of return on government bonds with an allowance for out-performance. The long-term expected
return on high yield bonds, secured loans and multi asset credit is based on the return on traditional corporate bonds with an
allowance for out-performance.

The underlying asset split of the fund is shown below.

Asset Category

Corporate Bonds (including 50% high yield bonds)
Equities
Secured Loans and Multi Asset Credit

December 31,
2021
37 %
24 %
39 %
100 %

December 31,
2020
40 %
21 %
39 %
100 %

Applying the above expected long term rates of return to the asset distribution at December 31, 2021, gives rise to an

expected overall rate of return of scheme assets of approximately 3.8% per annum.

132

Plan Asset Fair Value Measurements

Cash

Fixed Income Securities

L&G Life GPBF All World Equity Index Fund

L&G Life DC Active Corporate Bond

Stone Harbor High Yield Bond Fund

Ninety One Global Total Return Credit

Stone Harbor Multi Asset Credit Portfolio

Barings European Loan Fund Buy & Hold

Cash Flows

Quoted Prices in Active
Markets for Identical Assets
Level 1

December 31,
2021

December 31,
2020

(in thousands)

162 $

8,743

6,409

6,965

3,435

3,359

7,125

7,460

6,797

6,861

3,472

3,389

6,622

36,198 $

34,612

The Company expects to contribute $0.1 million to the pension fund in the year ending December 31, 2022.

The following annual benefit payments, which reflect expected future service as appropriate, are expected to be paid.

2022

2023

2024

2025

2026

Years 2027 - 2031

(in thousands)
$

256

340

417

453

788

3,859

The expected cash flows are estimated figures based on the members expected to retire over the next 10 years
assuming no early retirements, withdrawals or commutation of pension for cash. At the present time it is not clear whether
annuities will be purchased when members reach retirement or whether pensions will be paid each month out of scheme assets.
The cash flows above have been estimated on the assumption that pensions will be paid monthly out of scheme assets. If
annuities are purchased, then the expected benefit payments will be significantly different from those shown above.

133

Aptiv Solutions pension plan

On May 7, 2014 the Company acquired 100% of the common stock of Aptiv Solutions ("Aptiv"). The acquisition of Aptiv
was accounted for as a business combination in accordance with ASC 805 'Business Combinations'. The Company has a
defined benefit plan covering its employees in Switzerland as mandated by the Swiss government. Benefits are based on the
employee's years of service and compensation. Benefits are paid directly by the Company when they become due, in conformity
with the funding requirements of applicable government regulations. The plan is managed externally and the related pension
costs and liabilities are assessed in accordance with the advice of a professionally qualified actuary. Plan assets at
December 31, 2021 and December 31, 2020 consist of units held in independently administered funds. The pension costs of this
plan are presented in the following tables in accordance with the requirements of ASC 715-60 'Defined Benefit Plans – Other
Postretirement'.

Funded status

Projected benefit obligation

Fair value of plan assets

Funded status

Non-current other liabilities (note 9)

Change in benefit obligation

Benefit obligation at beginning of year

Service cost

Interest cost

Plan participants' contributions

Settlement

Prior service cost

Transferred balances

Actuarial (gain)/ loss

Foreign currency exchange rate changes

Benefit obligation at end of year

Change in plan assets

Fair value of plan assets at beginning of year

Expected return on plan assets

Actual return on plan assets

Scheme contributions

Plan participants' contributions

Transferred balances

Settlement

Foreign currency exchange rate changes

Fair value of plan assets at end of year

December 31,
2021

December 31,
2020

(in thousands)

(7,643) $

6,964

(679) $

(8,620)

7,601

(1,019)

December 31,
2021

December 31,
2020

(in thousands)

8,620 $

150

(483)

(82)

(484)

(261)

7,047

139

—

(23)

245

406

704

7,643 $

8,620

December 31, December 31,

2021

2020

(in thousands)

7,601 $

6,014

(238)

128

(483)

(230)

519

105

245

—

616

6,964 $

7,601

The fair values of the assets above do not include any of the Company's own financial instruments, property occupied

by, or other assets used by, the Company.

134

PRA Switzerland AG pension plan

On July 1, 2021, the Company completed the Acquisition of PRA. PRA Switzerland AG, a subsidiary of the Company
has a defined benefit plan covering its employees in Switzerland as mandated by the Swiss government. Benefits are based on
the employee's years of service and compensation. Benefits are paid directly by the Company when they become due, in
conformity with the funding requirements of applicable government regulations. The plan is managed externally and the related
pension costs and liabilities are assessed in accordance with the advice of a professionally qualified actuary. Plan assets at
December 31, 2021 consist of units held in independently administered funds. The pension costs of this plan are presented in
the following tables in accordance with the requirements of ASC 715-60 'Defined Benefit Plans – Other Postretirement'.

Funded status

Projected benefit obligation

Fair value of plan assets

Funded status

Non-current other liabilities (note 9)

Change in benefit obligation

Benefit obligation as at July 1, 2021

Service cost

Interest cost

Plan participants’ contributions

Transferred benefits paid

Actuarial loss

Foreign currency exchange rate changes

Benefit obligation at end of year

Change in plan assets

Fair value of plan assets at as at July 1, 2021

Expected return on plan assets

Scheme contributions

Plan participants’ contributions

Transferred benefits paid

Foreign currency exchange rate changes

Fair value of plan assets at end of year

December 31,
2021

(in thousands)

(4,990)

3,017

(1,973)

December 31,
2021

(in thousands)

4,890

207

135

(113)

(149)

4,990

December 31,

2021

(in thousands)

2,849

135

(113)

(4)

3,017

The fair values of the assets above do not include any of the Company's own financial instruments, property occupied

by, or other assets used by, the Company.

135

11. Equity Incentive Schemes and Stock Compensation Charges

Share Options

On July 21, 2008 the Company adopted the Employee Share Option Plan 2008 (the "2008 Employee Plan") pursuant to
which the Compensation and Organization Committee of the Company's Board of Directors may grant options to any employee,
or any Director holding a salaried office or employment with the Company or a Subsidiary for the purchase of ordinary shares.
On the same date, the Company also adopted the Consultants Share Option Plan 2008 (the "2008 Consultants Plan"), pursuant
to which the Compensation and Organization Committee of the Company's Board of Directors may grant options to any
consultant, adviser or non-executive Director retained by the Company or any Subsidiary for the purchase of ordinary shares.

On February 14, 2017 both the 2008 Employee Plan and the 2008 Consultants Plan (together the "2008 Option Plans")
were amended and restated in order to increase the number of options that can be issued under the 2008 Consultants Plan from
0.4 million to 1.0 million and to extend the date for options to be granted under the 2008 Option Plans.

An aggregate of 6.0 million ordinary shares have been reserved under the 2008 Employee Plan, as reduced by any
shares issued or to be issued pursuant to options granted under the 2008 Consultants Plan, under which a limit of 1.0 million
shares applies. Further, the maximum number of ordinary shares with respect to which options may be granted under the 2008
Employee Option Plan, during any calendar year to any employee shall be 0.4 million ordinary shares. There is no individual limit
under the 2008 Consultants Plan. No options may be granted under the 2008 Option Plans after February 14, 2027.

Each option granted under the 2008 Option Plans will be an employee stock option, or NSO, as described in Section
422 or 423 of the Internal Revenue Code. Each grant of an option under the 2008 Options Plans will be evidenced by a Stock
Option Agreement between the optionee and the Company. The exercise price will be specified in each Stock Option Agreement,
however option prices will not be less than 100% of the fair market value of an ordinary share on the date the option is granted.

On January 17, 2003 the Company adopted the Share Option Plan 2003 (the "2003 Share Option Plan") pursuant to
which the Compensation and Organization Committee of the Board could grant options to officers and other employees of the
Company or its subsidiaries for the purchase of ordinary shares. An aggregate of 6.0 million ordinary shares were reserved
under the 2003 Share Option Plan; and in no event could the number of ordinary shares issued pursuant to options awarded
under this plan exceed 10% of the outstanding shares, as defined in the 2003 Share Option Plan, at the time of the grant, unless
the Board expressly determined otherwise. Further, the maximum number of ordinary shares with respect to which options could
be granted under the 2003 Share Option Plan during any calendar year to any employee was 0.4 million ordinary shares. The
2003 Share Option Plan expired on January 17, 2013. No new options may be granted under this plan.

Share option awards are granted with an exercise price equal to the market price of the Company's shares at date of
grant. Prior to 2018, share options typically vest over a period of five years from date of grant and expire eight years from date of
grant. Share options granted to non-executive directors from 2018 vest over 12 months and expire eight years from the date of
grant.

Legacy PRA Equity Incentive Plans

The following represent the legacy PRA equity incentive plans, which still have equity outstanding but have been

terminated as of July 1, 2021, as to grants of future awards.

Pursuant to the Merger Agreement, effective on July 1, 2021, each outstanding stock option and restricted stock unit
under the PRA Plans was assumed by the Company and converted into a stock option or Restricted Share Unit exercisable for
or payable in Ordinary Shares based on the ratio of the average trading price per Ordinary Share for the ten days prior to July 1,
2021, and the corresponding value of the Merger consideration for each PRA Share. Accordingly, the plans as detailed below
were assumed by the Company.

PRA Health Sciences, Inc. 2020 Stock Incentive Plan was amended and restated and assumed by the Registrant
effective as of July 1, 2021. The 2020 Stock Incentive Plan (“the 2020 Plan”), was approved by the PRA stockholders at their
annual meeting on May 18, 2020. The 2020 Plan allowed for the issuance of stock options, stock appreciation rights, restricted
shares and restricted stock units, other stock-based awards, and performance compensation awards as permitted by applicable
laws. The 2020 Plan authorized the issuance of 2,500,000 shares of common stock plus all shares that remained available under
the prior plan on May 18, 2020.

136

Directors approved the formation of the 2014 Plan for Key PRA Employees. The 2014 Plan allowed for the issuance of stock
options, stock appreciation rights, restricted shares and restricted stock units, other stock-based awards, and performance
compensation awards as permitted by applicable laws.

The following table summarizes the transactions for the Company's share option plans for the years ended

December 31, 2021, December 31, 2020 and December 31, 2019:

Outstanding at December 31, 2018

Granted

Exercised

Canceled

Outstanding at December 31, 2019

Granted

Exercised

Canceled/expired

Outstanding at December 31, 2020

Assumed through business combinations *

Granted

Exercised

Canceled/expired

Outstanding at December 31, 2021

Vested and exercisable at December 31, 2021

Options Granted
Under Plans

Weighted Average
Exercise Price

920,746 $

97,112 $

(329,870) $

(31,881) $

656,107 $

107,737 $

(193,417) $

(16,681) $

553,746 $

2,177,130 $

100,299 $

(1,065,529) $

(70,186) $

1,695,460 $

989,419 $

74.32

140.13

65.54

88.12

87.80

159.83

68.19

92.21

108.53

108.78

177.76

111.29

128.46

104.79

91.70

*Represents stock options issued as replacement awards in connection with the Merger.

The weighted average remaining contractual life of options outstanding and options exercisable at December 31, 2021,

was 5.39 years and 4.55 years respectively (2020: 4.86 years and 3.60 years respectively).

Outstanding and exercisable share options:

The following table summarizes information concerning outstanding and exercisable share options as of December 31,

2021:

Range Exercise
Price

Options Outstanding
Number of
Shares

Weighted
Average
Remaining
Contractual Life

Weighted Average
Exercise Price

Number of
Shares

Weighted Average
Exercise Price

Options Exercisable

14.80 - 97.30

103.81 - 124.00

125.74 - 147.26

159.33 - 231.08

638,118

320,310

540,296

196,736

3.45

6.49

6.56

6.68

605,624

130,920

235,808

17,067

14.80 - 231.08

1,695,460

5.39 $

104.79

989,419 $

91.70

137

Options outstanding include both vested and unvested options as at December 31, 2021. Options exercisable represent
options which have vested at December 31, 2021. From the date of grant, substantially all options vest over a five to eight year
period.

Fair value of Stock Options Assumptions

The weighted average fair value of options granted during the years ended December 31, 2021, December 31, 2020
and December 31, 2019 was calculated using the Black-Scholes option pricing model. The weighted average fair values and
assumptions were as follows:

Weighted average fair value

Assumptions:

Expected volatility

Dividend yield

Risk-free interest rate

Expected life

Year Ended

December 31,
2021

December 31,
2020

December 31,
2019

49.15

42.43

43.43

30 %

— %

0.78 %

5.0 years

30 %

— %

0.57 %

5.0 years

30 %

— %

2.55 %

5.0 years

The weighted average fair value of options assumed on the date of the Merger was calculated using the Black-Scholes

option pricing model. The weighted average fair values on the date of the Merger and assumptions used were as follows:

Weighted average grant date fair value

Assumptions:

Expected volatility

Dividend yield

Risk-free interest rate

Expected life

July 1, 2021

107.21

30 %

— %

0.56 %

3.5 years

Expected volatility is based on the historical volatility of our common stock over a period equal to the expected term of
the options; the expected life represents the weighted average period of time that options granted are expected to be outstanding
given consideration to vesting schedules and our historical experience of past vesting and termination patterns. The risk-free rate
is based on the U.S. government zero-coupon bonds yield curve in effect at time of the grant for periods corresponding with the
expected life of the option.

Restricted Share Units and Performance Share Units

On April 23, 2013 the Company adopted the 2013 Employees Restricted Share Unit and Performance Share Unit Plan
(the "2013 RSU Plan") pursuant to which the Compensation and Organization Committee of the Company's Board of Directors
may select any employee, or any Director holding a salaried office or employment with the Company, or a Subsidiary to receive
an award under the plan. On May 11, 2015 the 2013 RSU Plan was amended and restated in order to increase the number of
shares that can be issued under the RSU Plan by 2.5 million shares. Accordingly, an aggregate of 4.1 million ordinary shares
have been reserved for issuance under the 2013 RSU Plan. The shares are awarded at par value and vest over a service period.
Awards under the 2013 RSU Plan may be settled in cash or shares at the option of the Company.

On April 30 2019, the Company approved the 2019 Consultants and Directors Restricted Share Unit Plan (the “2019
Consultants RSU Plan”), which was effective as of May 16, 2019, pursuant to which the Compensation and Organization
Committee of the Company’s Board of Directors may select any consultant, adviser or non-executive Director retained by the
Company, or a Subsidiary to receive an award under the plan. 250,000 ordinary shares have been reserved for issuance under
the 2019 Consultants RSU Plan. The awards are at par value and vest over a service period. Awards granted to non-executive
directors during 2020 and 2021 vest over twelve months.

138
The Company has awarded RSUs and PSUs to certain key individuals of the Group. The following table summarizes

RSU and PSU activity for the year ended December 31, 2021:

PSU
Outstanding
Number of
Shares

PSU
Weighted
Average
Grant Date
Fair Value

RSU
Outstanding
Number
of Shares

RSU
Weighted
Average
Grant Date
Fair Value

Outstanding at December 31, 2020

159,641 $

137.64

341,424 $

145.77

Assumed through business combination*

Granted

Shares vested **

Forfeited

— $

—

589,517 $

55,444 $

177.77

171,316 $

(44,132) $

115.61

(446,404) $

(16,763) $

141.36

(83,068) $

206.71

214.36

186.99

188.49

Outstanding at December 31, 2021

154,190 $

160.23

572,785 $

191.20

* Represents restricted stock units issued as replacement awards in connection with the Merger.
** Includes 161,389 RSU's which vested on the date of the Merger.

The fair value of RSUs vested for the year ended December 31, 2021 totaled $83.5 million (2020: $14.3 million). The

share price range for the year was $115.11 - $206.71 (2020: $83.47 - $156.21).

The fair value of PSUs vested for the year ended December 31, 2021 totaled $5.1 million (2020: $5.3 million). The

share price range for the year was $115.11 - $125.74 (2020: $83.47 - $90.03).

The PSUs vest based on service and specified EPS targets over the period 2019 – 2021, 2020 – 2022 and 2021 –

2023. Depending on the actual amount of EPS from 2019 to 2023, up to an additional 71,890 PSUs may also be granted.

Non-cash stock compensation expense

Income from operations for the year ended December 31, 2021 is stated after charging $133.8 million in respect of non-

cash stock compensation expense. Non-cash stock compensation expense has been allocated as follows:

Direct costs

Selling, general and administrative

Transaction and integration related *

Total compensation costs

Year ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

18,551 $

8,557 $

41,457

73,836

17,714

—

14,777

12,042

—

133,844 $

26,271 $

26,819

* Represents the post combination portion of the accelerated vesting of awards following the completion of the Merger

The income tax expense for the year ended December 31, 2021 reflects a net income tax benefit of $22.7 million in
connection with stock compensation (including excess tax benefits) and the total tax benefit in connection with stock options
exercised during 2021 was $23.9 million. The income tax expense for the year ended December 31, 2020 reflects a net income
tax benefit of $6.9 million in connection with stock compensation (including excess tax benefits) and the total tax benefit in
connection with stock options exercised during 2020 was $2.5 million. The income tax expense for the year ended December 31,
2019 reflects a net income tax benefit of $8.2 million in connection with stock compensation (including excess tax benefits) and
the total tax benefit realized in connection with stock options exercised during 2019 was $1.9 million.

139

12. Fair Value

The Company records certain assets and liabilities at fair value. Fair value is defined as the price that would be received
to sell an asset, or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly
transaction between market participants at the measurement date. A three-level fair value hierarchy that prioritizes the inputs
used to measure fair value is described below. This hierarchy requires entities to maximize the use of observable inputs and
minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:

•
•

•

Level 1 — Quoted prices in active markets for identical assets or liabilities.
Level 2 — Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and
liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or
other inputs that are observable or can be corroborated by observable market data.
Level 3 — Unobservable inputs that are supported by little or no market activity. This includes certain pricing models,
discounted cash flow methodologies, and similar techniques that use significant unobservable inputs.

The carrying amounts of financial instruments, including cash and cash equivalents, accounts receivable, unbilled
services, contract assets, accounts payable, and unearned revenue approximate fair value due to the short maturities of these
instruments.

Recurring Fair Value Measurements

The Company classifies its interests in investments in equity-long term having considered the nature of its investment,
the extent of influence over operating and financial decisions and the availability of readily determinable fair values. The
Company determined that the interests in funds at December 31, 2021 and December 31, 2020 meet the definition of equity
securities without readily determinable fair values. The Company concluded that the interests held at December 31, 2021 and
December 31, 2020 qualify for the Net Asset Value (NAV) practical expedient in ASC 820 'Fair value measurements and
disclosures'. Any increases or decreases in fair value are recognized in net income in the period. These are therefore measured
at Level 3 of the fair value hierarchy. There was an increase in fair value of $3.2 million (December 31, 2020: $2.5 million)
recognized in net income during the year bringing the carrying value of the subscriptions to $22.6 million at December 31, 2021
(December 31, 2020: $15.8 million).

Non-recurring Fair Value Measurements

Certain assets and liabilities are carried on the accompanying Consolidated Balance Sheet at cost and are not re-
measured to fair value on a recurring basis. These assets include finite-lived intangible assets that are tested for impairment
when a triggering event occurs and goodwill that is tested for impairment annually or when a triggering event occurs. As of
December 31, 2021, assets carried on the balance sheet and not re-measured to fair value on a recurring basis totaled
approximately $13,748.8 million and are identified as Level 3 assets. These assets are comprised of goodwill of $9,037.9 million
and identifiable intangible assets, net of $4,710.8 million. Refer to note 24 - Non-current bank credit lines and loan facilities for
additional information regarding the fair value of long-term debt balances.

13. Share Capital

Holders of ordinary shares will be entitled to receive such dividends as may be recommended by the Board of Directors
of the Company and approved by the shareholders and/or such interim dividends as the Board of Directors of the Company may
decide. On liquidation or a winding up of the Company, the par value of the ordinary shares will be repaid out of the assets
available for distribution among the holders of the ordinary shares of the Company. Holders of ordinary shares have no
conversion or redemption rights. On a show of hands, every holder of an ordinary share present in person or proxy at a general
meeting of shareholders shall have one vote, for each ordinary share held with no individual having more than one vote.

During the year ended December 31, 2021, 1,065,529 options were exercised by employees at an average exercise
price of $111.29 per share for total proceeds of $118.6 million. During the year ended December 31, 2021, 446,404 ordinary
shares were issued in respect of certain RSUs and 44,132 ordinary shares were issued in respect of PSUs previously awarded
by the Company.

During the year ended December 31, 2020, 193,417 options were exercised by employees at an average exercise price
of $68.19 per share for total proceeds of $13.2 million. During the year ended December 31, 2020, 144,172 ordinary shares were
issued in respect of certain RSUs and 63,516 ordinary shares were issued in respect of PSUs previously awarded by the
Company.

140During the year ended December 31, 2019, 329,870 options were exercised by employees at an average exercise price
of $65.54 per share for total proceeds of $21.6 million. During the year ended December 31, 2019, 237,119 ordinary shares were
issued in respect of certain RSUs and 118,611 ordinary shares were issued in respect of PSUs previously awarded by the
Company.

(a) Share Repurchase Program

There were no share buybacks in the year ended December 31, 2021.

A resolution was passed at the Company’s Annual General Meeting (“AGM”) on July 22, 2016, which authorized the
Directors to purchase (buyback) up to 10% of the outstanding shares in the Company. This authorization was renewed at the
Company's AGM on each of July 25, 2017, July 24, 2018, July 23, 2019, July 21, 2020 and July 20, 2021. On October 3, 2016,
the Company commenced a share buyback program of up to $400 million. The share buyback program was completed during
the year ended December 31, 2018 with a total of 4,026,576 ordinary shares redeemed for a total consideration of
$372.1 million. On January 8, 2019, the Company commenced a further share buyback program of up to 1.0 million ordinary
shares which was completed during the year ended December 31, 2019. These shares were redeemed by the Company for a
total consideration of $141.6 million. On October 22, 2019, the Company commenced a further share buyback program. At
December 31, 2019, 35,100 ordinary shares were redeemed by the Company for a total consideration of $5.3 million. During the
year ended December 31, 2020, 1,235,218 ordinary shares were redeemed by the Company under this buyback program for a
total consideration of $175.0 million.

Under the repurchase program, a broker purchased or may purchase the Company's shares from time to time on the
open market or in privately negotiated transactions in accordance with agreed terms and limitations. The program was and may
be in the future designed to allow share repurchases during periods when the Company would ordinarily not be permitted to do
so because it may be in possession of material non-public or price-sensitive information or due to applicable insider trading laws
or self-imposed trading blackout periods. The Company's instructions to the broker in such cases were or may in the future be
irrevocable and the trading decisions in respect of the repurchase program were made or will be made independently of and
uninfluenced by the Company. The Company confirms that on entering the share repurchase plans it had no material non-public,
price-sensitive or inside information regarding the Company or its securities. Furthermore, the Company will not enter into
additional plans whilst in possession of such information. The timing and actual number of shares acquired by way of the
redemption will be dependent on market conditions, legal and regulatory requirements and the other terms and limitations
contained in the program. In addition, acquisitions under the program may be suspended or discontinued in certain
circumstances in accordance with the agreed terms. Therefore, there can be no assurance as to the timing or number of shares
that may be acquired under the program.

14. Income Taxes

The Company's United States and Irish based subsidiaries file income tax returns in the United States and Ireland

respectively. Other foreign subsidiaries are taxed separately under the laws of their respective countries.

The components of income before income tax expense are as follows:

Ireland

United States

Other

December 31,
2021

Year ended
December 31,
2020

(in thousands)

December 31,
2019

231,893 $

280,310 $

323,726

(278,413)

243,200

41,950

58,945

21,073

82,190

Income before income tax expense

196,680 $

381,205 $

426,989

141

The components of income tax expense are as follows:

Income tax expense:

Current tax expense:

Ireland

United States

Other

Year ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

18,469 $

28,963 $

35,478

48,003

3,022

14,963

35,955

5,073

11,642

Total current tax expense

101,950

46,948

52,670

Deferred tax (benefit)/expense:

Ireland

United States

Other

553

(52,717)

(8,452)

1,654

4,577

(5,304)

2,833

(3,502)

(868)

Total deferred tax (benefit)/expense

(60,616)

927

(1,537)

Income tax expense allocated to continuing operations

41,334

47,875

51,133

Income tax expense was allocated to the following components of other
comprehensive income:

Currency impact on long term funding

Total

41,383 $

47,943 $

51,158

Ireland's statutory income tax rate is 12.5%. The Company's consolidated reported income tax expense differed from

the amount that would result from applying the Irish statutory rate as set forth below:

Year ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

Taxes at Irish statutory rate of 12.5% (2021:12.5%; 2020:12.5%)

24,586 $

47,651 $

Foreign and other income taxed at higher rates

Research & development tax incentives

Movement in valuation allowance

Effects of change in tax rates

Change in unrecognized tax benefits

Impact of stock compensation

Other

Income tax expense

20,045

(3,120)

3,101

(128)

5,246

(9,083)

687

7,943

(1,243)

3,581

108

(1,672)

(5,150)

(3,343)

53,374

7,356

(893)

(10)

359

(1,273)

(7,383)

(397)

41,334 $

47,875 $

51,133

142

The tax effects of temporary differences that give rise to significant portions of deferred tax assets and deferred tax

liabilities are presented below:

Deferred tax liabilities:
Property, plant and equipment
Right-of-use-assets

Goodwill
Intangible assets
Other

Total deferred tax liabilities recognized

Deferred tax assets:
Operating loss and tax credits carryforwards
Property, plant and equipment
Lease liabilities
Intangible assets
Accrued expenses and unbilled revenue
Stock compensation
Deferred compensation
Unearned revenue
Other

Total deferred tax assets

Valuation allowance for deferred tax assets

Deferred tax assets recognized

December 31,
2021

December 31,
2020

(in thousands)

19,606 $
33,449
33,354
1,201,086
1,761

1,359
9,402
31,629
13,398
1,009

1,289,256

56,797

86,893
5,846
36,106
4,596
69,198
25,557
3,445
64,924
602

297,167

42,794
6,040
9,394
—
24,368
3,672
3,184
2,257
155

91,864

(45,495)

(32,768)

251,672

59,096

Overall net deferred tax asset/(liability)

(1,037,584) $

2,299

At December 31, 2021 Ireland subsidiaries had tax credit carryforwards for income tax purposes that may be carried

forward indefinitely, available for offset against future tax liabilities, if any, of $14.0 million.

At December 31, 2021 U.S. subsidiaries had U.S. federal and state net operating loss ("NOL") carryforwards of
approximately $10.3 million and $297.0 million, respectively. These NOLs are available for offset against future taxable income
and the expiry dates are shown in the table below. Of the $10.3 million U.S. federal NOLs, approximately $5.0 million is available
for offset against future U.S. federal taxable income in 2022. The subsidiaries' ability to use the remaining U.S. federal and state
NOL carryforwards is limited on an annual basis due to change of ownership in 2014, 2017, and 2019, as defined by Section 382
of the Internal Revenue Code of 1986, as amended. Of the U.S. federal NOLs, $10.3 million are limited by Section 382 as
follows: $10.2 million for the years 2022 - 2035 and $0.1 million in 2036 - 2040. As at December 31, 2021, U.S subsidiaries also
had disallowed interest carryforwards of $145.7 million that can be carried forward indefinitely. These carryforwards are available
for offset against future taxable income in the event that the U.S subsidiaries have excess capacity for interest deductions in
future years.

At December 31, 2021 other than those in the U.S. and Ireland, we had operating loss carryforwards for income tax
purposes that may be carried forward indefinitely, available to offset against future taxable income, if any, of approximately $42.3
million. At December 31, 2021 those subsidiaries also had additional operating loss carryforwards of $19.9 million which are due
to expire between 2022 and 2028 and operating loss carryforwards of $19.9 million which are due to expire between 2029 and
2038. In addition, at December 31, 2021 those subsidiaries had tax credit carryforwards for income tax purposes that may be
carried forward indefinitely, available to offset against future tax liabilities, if any, of $5.3 million.

143

The expected expiry dates of these US losses are as follows:

2022-2035

2036-2040

Indefinite

Federal
NOL's

State
NOL's

(in thousands)

10,238 $

227,538

25,073

44,370

10,349 $

296,981

In addition, we also have general business tax credit carryforwards of approximately $0.8 million that are available to
reduce future U.S. federal and state income taxes. The general business tax credits are non-refundable and are due to expire
between the years 2026-2038.

The valuation allowance at December 31, 2021 was approximately $45.5 million. The valuation allowance for deferred

tax assets as of December 31, 2020 and December 31, 2019 was $32.8 million and $27.7 million respectively. The net change in
the total valuation allowance was an increase of $12.8 million during 2021 and an increase of $5.1 million during 2020. Of the
total increase of $12.8 million in 2021, $9.3 million was in respect of acquired entity, $4.4 million was recognized within income
tax expense and a decrease of $0.9 million was recognized in Other Comprehensive Income. Of the total increase of $5.1 million
in 2020, $3.6 million resulted in a current year income tax expense, and $1.5 million was recognized in Other Comprehensive
Income.

The valuation allowances at December 31, 2021 and December 31, 2020 were primarily related to operating losses and
tax credits carried forward that, in the judgment of management, are not more likely than not to be realized. In assessing the
realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the
deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future
taxable income during the periods in which those temporary differences become deductible. Management considers the
scheduled reversal of deferred tax liabilities, loss utilization, projected future taxable income and mitigation strategies in making
this assessment. In respect of deferred tax assets not subject to a valuation allowance, management considers that it is more
likely than not that these deferred tax assets will be realized on the basis that there will be sufficient reversals of deferred tax
liabilities and taxable income in future periods.

The Company has recognized a deferred tax liability of $0.8 million (2020: $0.9 million) for investments in foreign
subsidiaries where the Company does not consider the earnings to be indefinitely reinvested. For the deferred tax liability not
recognized in respect of temporary differences related to investments in foreign subsidiaries which are considered to be
indefinitely reinvested, it is not practicable to calculate the exact unrecognized deferred tax liability, however it is not expected to
be material as Ireland allows a tax credit in respect of distributions from foreign subsidiaries at the statutory tax rate in the
jurisdiction of the subsidiary so that no material tax liability would be expected to arise in Ireland in the event these earnings were
ever remitted. In addition, withholding taxes applicable to remittances from foreign subsidiaries would not be expected to be
material given Ireland’s tax treaty network and the EU parent subsidiary directive.

A reconciliation of the beginning and ending amount of total unrecognized tax benefits is as follows:

Unrecognized tax benefits at start of year

Increase related to acquired tax positions

Increase related to prior year tax positions

Decrease related to prior year tax positions

Increase related to current year tax positions

Settlements

Lapse of statute of limitations

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

19,078 $

20,156 $

21,433

170,047

204

(1,695)

18,613

(844)

(3,338)

—

401

(1,271)

2,931

(369)

(2,770)

—

1,588

(347)

(2,518)

Unrecognized tax benefits at end of year

202,065 $

19,078 $

20,156

The relevant statute of limitations for unrecognized tax benefits totaling $38.8 million could potentially expire during

2022.

144

Included in the balance of total unrecognized tax benefits at December 31, 2021 were potential benefits of $202.1
million, which if recognized, would affect the effective rate on income tax from continuing operations. The balance of total
unrecognized tax benefits at December 31, 2020 and December 31, 2019 included potential benefits which, if recognized, would
affect the effective rate of income tax from continuing operations of $19.1 million and $20.2 million respectively.

Interest and penalties recognized during the year ended December 31, 2021 amounted to a net charge of $1.9 million
(2020: ($0.6 million), 2019: Nil) and are included within the income tax expense. Total accrued interest and penalties as of
December 31, 2021 and December 31, 2020 were $15.5 million and $0.5 million respectively and are included in closing income
taxes payable at those dates.

Our major tax jurisdictions are Ireland and the United States. We may potentially be subjected to tax audits in both our
major jurisdictions. In Ireland, tax periods open to audit include the years ended December 31, 2017, December 31, 2018,
December 31, 2019, December 31, 2020 and December 31, 2021. In the United States, tax periods open to audit include the
years ended December 31, 2016, December 31, 2017, December 31, 2018, December 31, 2019, December 31, 2020 and
December 31, 2021. During such audits, local tax authorities may challenge the positions taken by us in our tax returns.

15. Restructuring charges

A restructuring charge of $31.1 million was recognized during the year ended December 31, 2021 under a restructuring
plan adopted following a review of operations. The restructuring plan reflected resource rationalization across the business to
improve employee utilization and an office consolidation program to optimize the Company's office footprint. The restructuring
plan resulted in a charge of $4.8 million relating to workforce reductions, an impairment of ROU assets and associated
unavoidable costs totaling $21.9 million and fixed asset impairment of $4.4 million.

Restructuring charges

Net charge

Year Ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

31,105 $

18,089 $

31,105 $

18,089 $

—

At December 31, 2021, a total liability of $28.4 million was on the Consolidated Balance Sheet relating to restructuring
activities. The total liability included $23.2 million from lease and lease related liabilities of which $10.4 million is included within
other liabilities and $12.8 million is included within non-current operating lease liabilities. The remaining provision of $5.2 million
relates to workforce reduction and is included within other liabilities.

Year Ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

10,748 $

26,674

(9,069)

28,353 $

1,637 $

18,089

(8,978)

10,748 $

6,419

—

(4,782)

1,637

Opening provision

Additional provision in the year

Utilization

Ending provision

16. Commitments and Contingencies

Litigation

145

Operating Leases

The Company has several non-cancelable operating leases, primarily for facilities, that expire over the next twelve
years. These leases generally contain renewal options and require the Company to pay all executory costs such as maintenance
and insurance. See note 23 - Operating leases for rental expense pursuant to ASC 842 for the years ended December 31, 2021
and December 31, 2020 and future minimum rental commitments as of December 31, 2021.

17. Disaggregation of Revenue

Revenue disaggregated by customer profile is as follows:

Top client

Clients 2-5

Clients 6-10

Clients 11-25

Other

Total

Year ended

December
31, 2021

December
31, 2020

December
31, 2019

(in thousands)

441,173 $

337,904 $

350,287

1,291,946

754,906

704,963

752,325

350,865

347,832

1,077,073

501,643

529,713

1,918,309

851,970

873,044

$5,480,826

$2,797,288

$2,805,839

Our customers have similar profiles and economic characteristics, and therefore have similar degrees of risk and growth

opportunities.

18. Accounts receivable, unbilled revenue (contract assets) and unearned revenue or payments on account (contract
liabilities)

Accounts receivable and unbilled revenue are as follows:

Billed services (accounts receivable)

Allowance for credit losses (note 19)

Accounts receivable (net)

Unbilled services (unbilled revenue)

Accounts receivable and unbilled revenue, net

December
31, 2021

December
31, 2020

(in thousands)

$ 1,349,851 $

722,420

(7,081)

(7,149)

1,342,770

715,271

623,121 $

428,684

$ 1,965,891 $ 1,143,955

Unbilled services and unearned revenue or payments on account (contract assets and liabilities) were as follows:

(in thousands, except percentages)

December
31, 2021

December
31, 2020

$ Change

% Change

Unbilled services (unbilled revenue)

623,121 $

428,684 $

194,437

Unearned revenue (payments on account)

(1,323,961)

(660,883)

(663,078)

45.4 %

100.3 %

Net balance

(700,840) $

(232,199) $

(468,641)

(201.8) %

Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts
related to our contracts with customers. We record assets for amounts related to performance obligations that are satisfied but
not yet billed and/or collected. These assets are recorded as unbilled revenue and therefore contract assets rather than accounts
receivables when receipt of the consideration is conditional on something other than the passage of time. Liabilities are recorded
for amounts that are collected in advance of the satisfaction of performance obligations or billed in advance of the revenue being
earned.

146

Unbilled services/revenue balances arise where invoicing or billing is based on the timing of agreed milestones related
to service contracts for clinical research. Contractual billing arrangements in respect of certain reimbursable expenses
(principally investigators) require billing by the investigator to the Company prior to billing by the Company to the customer. As
there is no contractual right of set-off between unbilled services (contract assets) and unearned revenue (contract liabilities),
each are separately presented gross on the Consolidated Balance Sheet.

The Company is the contract principal in respect of both direct services and in the use of third parties (principally
investigator services) that support a clinical trial. The progress towards completion for clinical service contracts is measured
based on total project costs (including reimbursable costs). Amounts owed to investigators and others in respect of reimbursable
expenses at December 31, 2021 and December 31, 2020 were $323.6 million and $138.2 million (see note 8 - Other liabilities).

Unbilled services as at December 31, 2021 increased by $194.4 million as compared to December 31, 2020. Unearned
revenue increased by $663.1 million over the same period resulting in a increase of $468.6 million in the net balance of unbilled
services and unearned revenue or payments on account between December 31, 2020 and December 31, 2021. These
fluctuations are primarily due to the completion of the Merger on July 1, 2021 but are also partially due to timing of payments and
invoicing related to the Group's clinical trial management contracts. Billings and payments are established by contractual
provisions including predetermined payment schedules which may or may not correspond to the timing of the transfer of control
of the Company's services under the contract. Unbilled services arise from long-term contract when a cost-based input method of
revenue recognition is applied and revenue recognized exceeds the amount billed to the customer.

The credit loss expense recognized on the Group's receivables and unbilled services was $0.9 million and $2.9 million

for the twelve months ended December 31, 2021 and 2020, respectively.

As of December 31, 2021 approximately $13.3 billion of revenue is expected to be recognized in the future in respect of
unsatisfied performance obligations. The Company expects to recognize revenue on approximately 48% of the unrealized
performance obligation over the next twelve months, with the remainder recognized thereafter over the duration of the customer
contracts.

19. Provision for Credit Losses

The Company does business with most major international pharmaceutical companies. Provision for credit losses at

December 31, 2021 and December 31, 2020 comprises:

Opening provision

Amounts used during the year

Amounts provided during the year

Amounts released during the year

Foreign exchange

Closing provision

December 31,
2021

December 31,
2020

(in thousands)

7,149 $

(116)

705

(544)

(113)

7,380

(2,561)

2,692

(510)

148

7,081 $

7,149

20. Business Segment and Geographical Information

The Company is a clinical research organization ("CRO"), providing outsourced development services on a global basis
to the pharmaceutical, biotechnology and medical device industries. It specializes in the strategic development, management
and analysis of programs that support all stages of the clinical development process - from compound selection to Phase I-IV
clinical studies. The Company has the expertise and capability to conduct clinical trials in most major therapeutic areas on a
global basis and has the operational flexibility to provide development services on a stand-alone basis or as part of an integrated
"full-service" solution. The Company has expanded through internal growth, together with a number of strategic acquisitions to
enhance its expertise and capabilities in certain areas of the clinical development process.

The Company determines and presents operating segments based on the information that is internally provided to the
chief operating decision maker, the (‘CODM’) in accordance with ASC 280 'Segment Reporting'. The Company determined that
the CODM was comprised of the Chief Executive Officer and the Chief Financial Officer.

The Company operates as one business segment, which is the provision of outsourced development services on a

global basis to the pharmaceutical, biotechnology and medical devices industries.

147

Revenues are allocated to individual entities based on where the work is performed in accordance with the Company's
global transfer pricing model. Revenues and income from operations in Ireland are a function of our global contracting model and
the Group’s transfer pricing model.

ICON Ireland (Ireland Segment) acts as the Group entrepreneur under the Company’s global transfer pricing model
given its role in the development and management of the Group, its ownership of key intellectual property and customer
relationships, its key role in the mitigation of risks faced by the Group and its responsibility for maintaining the Company’s global
network. ICON Ireland enters into the majority of the Company’s customer contracts.

ICON Ireland remunerates other operating entities in the ICON Group on the basis of a guaranteed cost plus mark-up
for the services they perform in each of their local territories. The cost plus mark-up for each ICON entity is established to ensure
that each of ICON Ireland and the ICON entities that are involved in the conduct of services for customers, earn an appropriate
arms-length return having regard to the assets owned, risks borne, and functions performed by each entity from these
intercompany transactions. The cost plus mark-up policy is reviewed annually to ensure that it is market appropriate. The
integration of entities acquired through the Merger into this global network and global transfer pricing model remains ongoing.

The geographic split of revenue disclosed for each region outside Ireland is the cost plus revenue attributable to these
entities. The residual revenues of the Group, once each ICON entity has been paid its respective intercompany service fee,
generally fall to be retained by ICON Ireland. As such, revenues and income from operations in Ireland are a function of this
global transfer pricing model and comprise revenues of the Group after deducting the cost plus revenues attributable to the
activities performed outside Ireland. The integration of entities acquired through the Merger into the global transfer pricing model
remains ongoing and these entities were not substantially part of the Group's cost plus arrangement in the year ended
December 31, 2021.

The Company's areas of operation outside of Ireland include the United States, United Kingdom, Austria, Belgium,
Bulgaria, Czech Republic, France, Germany, Hungary, Italy, Latvia, Poland, Portugal, Romania, Russia, Serbia, Spain, Sweden,
The Netherlands, Turkey, Ukraine, Canada, Argentina, Brazil, Chile, Colombia, Mexico, Peru, China (including Hong Kong),
India, Israel, Japan, Singapore, South Korea, The Philippines, Taiwan, Thailand, Australia, New Zealand, South Africa, Belarus,
Bermuda, British Virgin Islands, Costa Rica, Croatia, Denmark, Egypt, Estonia, Finland, Georgia, Greece, Guatemala, Iceland,
Jersey, Kenya, Lithuania, Luxembourg, Malaysia, Norway, Panama, Puerto Rico, Slovakia, Switzerland and Uruguay.

There have been no changes to the basis of segmentation or the measurement basis for the segment results since the

prior year.

Reportable segment and geographic information at December 31, 2021 and December 31, 2020 and for the years

ended December 31, 2021, December 31, 2020 and December 31, 2019 is as follows:

a) The distribution of revenue by geographical area was as follows:

Ireland

Rest of Europe

U.S.

Other

Total

Year ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

1,365,909 $

1,181,292 $

1,252,834

1,175,515

416,884

2,581,007

925,563

358,395

273,549

388,916

892,497

271,592

5,480,826 $

2,797,288 $

2,805,839

148

b) The distribution of income from operations, excluding restructuring, transaction and integration related expenses, by
geographical area was as follows:

Ireland *

Rest of Europe

U.S.

Other

Total

Year ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

161,862 $

295,360 $

314,287

183,436

231,971

30,628

35,402

56,921

21,147

37,997

60,272

20,850

607,897 $

408,830 $

433,406

* Includes the full amount of the amortization charge associated with the intangible asset acquired in the Merger. These assets
have been provisionally allocated to Ireland.

Income from operations, excluding restructuring, transaction and integration related expenses of $607.9 million was
earned during the year ended December 31, 2021 having added back restructuring expenses of $31.1 million (see note 15
Restructuring charges) and transaction and integration related expenses of $198.3 million (see note 6 Business Combinations) to
income from operations of $378.5 million as presented in the Consolidated Statement of Operations.

c) The distribution of long-lived assets (property, plant and equipment and operating right-of-use assets), net, by geographical
area was as follows:

Ireland

Rest of Europe

U.S.

Other

Total

December 31,
2021

December 31,
2020

(in thousands)

118,253 $

118,361

121,174

239,828

55,312

36,723

65,152

38,668

534,567 $

258,904

21. Supplemental Disclosure of Cash Flow Information

Cash paid for interest

Cash paid for income taxes (net of refunds)

Year ended

December 31,
2021

December 31,
2020

December 31,
2019

(in thousands)

106,205 $

13,062 $

55,105 $

27,604 $

13,059

29,836

149

22. Accumulated Other Comprehensive Income

Currency translation adjustments

Currency impact on long term funding

Actuarial loss on defined benefit pension plan (note 10)

Realized gain on interest rate hedge

Amortization of gain on interest rate hedge

Loss on interest rate hedge

Amortization of loss on interest rate hedge

Total

23. Operating leases

Lease costs recorded under operating leases were as follows:

Operating lease costs

Income from sub-leases

Net operating lease costs

Year ended

December 31,
2021

December 31,
2020

(in thousands)

(75,986) $

(15,894)

(9,854)

(5,098)

—

(9,329)

(9,364)

4,658

(4,658)

(905)

(90,937) $

(35,477)

Year ended

December 31,
2021

December 31,
2020

(in thousands)

51,200 $

31,088

(1,338)

(940)

49,862 $

30,148

Of the total cost of $49.9 million incurred in the year ended December 31, 2021, $47.5 million is recorded within selling,
general and administration costs and $2.4 million is recorded within direct costs. Of the total cost of $30.1 million incurred in the
year ended December 31, 2020, $27.6 million is recorded within selling, general and administration costs and $2.5 million is
recorded within direct costs.

During the years ended December 31, 2021 and December 31, 2020, the Group did not incur any costs related to

variable lease payments.

Right-of-use assets obtained, in exchange for lease obligations, net of early termination options now reasonably certain
to be exercised, during the years ended December 31, 2021 and December 31, 2020 totaled $10.2 million and $12.1 million,
respectively. During the year ended December 31, 2021, office consolidations resulted in the recognition of an impairment of
ROU assets. The right-of-use assets related to these offices have been impaired and a charge of $15.4 million was recorded
(see note 15 - Restructuring charges). An impairment charge of $5.4 million was recognized during the year ended
December 31, 2020.

The weighted average remaining lease term and weighted-average discount rate at December 31, 2021 were 6.91
years and 2.51%, respectively. The weighted average remaining lease term and weighted-average discount rate at
December 31, 2020 were 4.45 years and 2.53%, respectively.

150

Future minimum lease payments under non-cancelable leases as of December 31, 2021 were as follows:

2022

2023

2024

2025

2026

Thereafter

Total future minimum lease payments

Lease imputed interest

Total

Minimum rental

payments

(in thousands)

54,292

45,469

29,607

20,758

17,714

59,858

227,698

(18,266)

209,432

Operating lease liabilities are presented as current and non-current. Operating lease liabilities of $49.9 million and $24.3

million have been included in other liabilities as at December 31, 2021 and December 31, 2020, respectively.

24. Non-current bank credit lines and loan facilities

The Company had the following debt outstanding as of December 31, 2021 and December 31, 2020:

(in thousands)

December 31, 2021

2021

2020

Maturity Date

Interest rate as of

December 31,

Principal amount

Senior Secured Credit Facility

Term loan

Senior Secured Notes

2020 Senior Notes:

Series A notes

Series B notes

Total debt

Less current portion of long-term debt

Total long-term debt

Less debt issuance costs and debt discount

2.75 % $

5,001,213 $

2.875 %

500,000

—

July 2028

July 2026

—

5,501,213

(55,150)

275,000

75,000

350,000

—

5,446,063

350,000

(64,901)

(1,523)

Total long-term debt, net

5,381,162 $

348,477

The Company paid a $27.6 million debt discount in connection with the Senior Secured Credit Facility and Senior

Secured Notes.

The Company incurred interest costs from various financing arrangements during the years ended December 31, 2021,
December 31, 2020 and December 31, 2019 as set out in the table below. These costs have been charged in the interest
expense line of the Consolidated Statement of Operations. In the year ended December 31, 2021, the Company incurred $86.7
million transaction related financing costs (inclusive of the amortization of financing fees which were previously capitalized)
associated with the debt facilities used to finance the Merger.

151

Year ended

December 31, 2021

December 31, 2020

December 31, 2019

(in thousands)

Interest expense on drawn facilities

Amortization of financing costs

Transaction and one time financing costs

Other financing costs/(credits)

Total financing costs

93,809 $

12,890

75,391

333

13,406 $

13,659

523

—

(910)

540

—

(923)

182,423 $

13,019 $

13,276

As of December 31, 2021, the contractual maturities of the Company's debt obligations were as follows:

Current maturities of long-term debt:

(in thousands)

2022

2023

2024

2025

2026 and thereafter

Total

55,150

5,280,613

5,501,213

The Company's primary financing arrangements are its senior secured credit facilities (the "Senior Secured Credit
Facilities"), which consists of a senior secured term loan and a revolving credit facility, and the senior secured notes (the "Senior
Secured Notes").

Senior Secured Credit Facilities

In conjunction with the completion of the Merger Agreement, on July 1, 2021, ICON entered into a credit agreement
providing for a senior secured term loan facility of $5,515 million and a senior secured revolving loan facility in an initial
aggregate principal amount of $300 million. The proceeds of the senior secured term loan facility were used to repay in full (i)
PRA’s existing credit facilities and (ii) the Company's private placement notes outstanding and fund, in part, the transaction. The
senior secured term loan facility will mature in July 2028 and the revolving loan facility will mature in July 2026.

152

On September 27, 2021, the Company repaid $13.8 million of the senior secured term loan facility and made a quarterly
interest payment of $40.4 million. On December 29, 2021, the Company repaid $500.0 million of the senior secured term loan
facility and made a quarterly interest payment of $40.8 million. These repayments resulted in an additional charge associated
with previously capitalized fees of $5.6 million. The Company is permitted to make prepayments on the senior secured term loan
without penalty.

Senior Secured Notes

In addition to the Senior Secured Credit Facilities, on July 1, 2021, a subsidiary of the Company issued $500 million in
aggregate principal amount of 2.875% senior secured notes due 2026 in a private offering (the “Offering”). The Senior Secured
Notes will mature on July 15, 2026. The proceeds from the Offering and borrowings made under the Senior Secured Credit
Facilities, together with cash on hand, were used to (i) fund the cash consideration payable by ICON for the Merger, (ii) repay
existing indebtedness of ICON and PRA and (iii) pay fees and expenses related to the Merger, the Offering and the Senior
Secured Credit Facilities. The Senior Secured Notes are guaranteed on a senior secured basis by ICON and its direct and
indirect subsidiaries that guarantee the Senior Secured Credit Facilities.

2020 Senior Notes

On December 8, 2020, the Company issued new senior notes, (the "2020 Senior Notes") for aggregate gross proceeds
of $350.0 million in the private placement market. The 2020 Senior Notes were issued in two tranches; Series A Notes of
$275.0 million at a fixed interest rate of 2.32% and Series B Notes of $75.0 million at a fixed interest rate of 2.43%. The effective
interest rate was adjusted by the impact of an interest rate cash flow hedge which was entered into in advance of the rate fixing
date. This cash flow hedge was deemed to be fully effective in accordance with ASC 815 'Derivatives and Hedging'. The realized
loss related to this derivative was recorded within other comprehensive income and amortized over the life of the 2020 Senior
Notes. The effective rate on the 2020 Senior Notes was fixed at 2.41%.

In connection with the Merger, the Company was required to repay the 2020 Senior Notes prior to entering into the
Senior Secured Credit Facilities and the Senior Secured Notes. In June 2021, ICON committed to entering into the Senior
Secured Credit Facilities and the Senior Secured Notes and therefore committed to replacing the 2020 Senior Notes. The 2020
Senior Notes have been repaid and long term financing consisting of the Senior Secured Credit Facilities and the Senior Secured
Notes have been drawn. The 2020 Senior Notes were repaid on July 1, 2021 inclusive of early repayment charges. The total
repayment on July 1, 2021 was $364.0 million.

Fair Value of Debt

The estimated fair value of the Company’s debt was $5,507.2 million at December 31, 2021. The fair values of the
Senior Secured Credit Facilities and Senior Secured Notes were determined based on Level 2 inputs, which are based on rates
at which the debt is traded among financial institutions.

153
25. Impact of New Accounting Pronouncements

Impact of new accounting pronouncements adopted during fiscal year ended December 31, 2021 (or previously)

Business combinations

The Company has taken the option to early adopt the amendments in this ASU for year ended December 31, 2021 and
apply the amendments to interim periods from the beginning of the fiscal year. The Company has applied the amendments of this
ASU to the Merger with PRA, completed on July 1, 2021. The application of these amendments has resulted in a $16.0 million
increase in goodwill and corresponding $16.0 million increase to unearned revenue compared to the Company's Balance Sheet
at September 30, 2021. Since July 1, 2021, the Company had amortized $4.0 million of the unearned revenue adjustment
through the revenue line in the Consolidated Statement of Comprehensive Income. This amortization has been reversed in
December 2021 resulting in a net nil impact on revenue for the year ended December 31, 2021.

Other accounting pronouncements adopted during fiscal year ended December 31, 2021

Impact of new accounting pronouncements which will be adopted during fiscal year ended December 31, 2022

No other new accounting pronouncement issued or effective has had, or is expected to have, a significant impact on the

Company’s consolidated financial statements.

26. Related Parties

154
On July 24, 2020, a subsidiary of the Company, ICON Clinical Research Limited, entered into an agreement to jointly
establish a new company, Oncacare, with a third party. The Company has invested $4.9 million to obtain a 49% interest in the
voting share capital of Oncacare. The Company provided corporate support services to Oncacare to the value of $465,000
during the year ended December 31, 2021. $264,000 was recorded as due from Oncacare at December 31, 2021. During the
year ended December 31, 2021, the Company provided a loan of $10 million to Oncacare in order to fund the continued start up
of the business' operations. The loan accrues annual interest at 1.6% and the loan is repayable on June 30, 2025. The full
amount of this loan remains outstanding at December 31, 2021 along with accrued interest of $23,000.

27. Net income per ordinary share

Basic net income per ordinary share attributable to the Group has been computed by dividing net income available to

ordinary shareholders by the weighted average number of ordinary shares outstanding during the period.

Diluted net income per ordinary share is computed by adjusting the weighted average number of ordinary shares
outstanding during the period for all potentially dilutive ordinary shares outstanding during the period and adjusting net income
for any changes in income or loss that would result from the conversion of such potential ordinary shares.

There is no difference in net income used for basic and diluted net income per ordinary share.

Basic and diluted net income per ordinary share attributable to the Group for the years ended December 31, 2020 and
December 31, 2019 include the adjustment to reflect the accretion of the noncontrolling interest in MeDiNova to its redemption
value. The noncontrolling interest was acquired in the year ended December 31, 2020 and therefore no adjustment has been
required in the year ended December 31, 2021.

The reconciliation of the number of shares used in the computation of basic and diluted net income per ordinary share is

as follows:

Weighted average number of ordinary shares outstanding for
basic net income per ordinary share

Effect of dilutive share options outstanding

Weighted average number of ordinary shares outstanding for
diluted net income per ordinary share

67,110,186

52,859,911

53,859,537

958,125

423,674

473,924

68,068,311

53,283,585

54,333,461

December 31, 2021 December 31, 2020 December 31, 2019

The reconciliation between net income attributable to the Group per the Consolidated Statement of Operations and the

net income used to calculate net income per ordinary share attributable to the Group is as follows:

December 31, 2021 December 31, 2020 December 31, 2019

(in thousands)

Net income attributable to the Group

153,185

332,331 $

373,986

Noncontrolling interest adjustment to redemption amount

—

(4,522)

(5,048)

Net income attributable to the Group (including NCI
redemption adjustment)

153,185

327,809

368,938

Net income per Ordinary Share attributable to the Group
(including NCI redemption adjustment):

Basic

Diluted

2.28 $

2.25 $

6.20 $

6.15 $

6.85

6.79

December 31, 2021 December 31, 2020 December 31, 2019

155

28. Subsequent Events

The Company has evaluated subsequent events from the Balance Sheet date through March 1, 2022, the date at which

the consolidated financial statements were available to be issued.

On February 18, 2022, the Company's Board of Directors authorized a new buyback program of up to $100 million of
the outstanding ordinary shares of the Company. All ordinary shares that are redeemed under the buyback program will be
canceled in accordance with the constitutional documents of the Company and the nominal value of these shares transferred to
an undenominated capital fund as required under Irish Company law. Repurchases under the share buyback program may be
effected from time to time in open market or privately negotiated transactions in accordance with agreed terms and limitations.
The timing and amount of the repurchase transactions under this program will depend on a variety of factors, including market
conditions and corporate and regulatory considerations. Depending upon results of operations, market conditions and the
development of the economy, as well as other factors, generally we will consider share repurchases on an opportunistic basis
from time to time. At March 1, 2022, the Company has repurchased $80.9 million of ordinary shares of the Company since
December 31, 2021.

The Company has determined that there are no other items to disclose.

156
INDEX TO EXHIBITS

Exhibit
Number

Title

2.1

2.2*

2.3

2.4

3.1

12.1*

12.2*

21.1

23.1*

Description of Securities Registered Under Section 12 of the Exchange Act.

Description of the Constitution of the Company (incorporated by reference to exhibit 99.2 to the Form 6K
(File No. 333-08704) filed on July 25, 2016).

Section 302 certifications.

Section 906 certifications.

List of Subsidiaries (incorporated by reference to Item 4 of Form 20-F filed herewith).

Consent of KPMG, Independent Registered Public Accounting Firm.

101.1*

Interactive Data Files (XBRL – Related Documents).

* Filed herewith

157
SIGNATURES

The Registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and
authorized the undersigned to sign this annual report on its behalf.

ICON plc

/s/ Brendan Brennan

Brendan Brennan

Chief Financial Officer

Date March 1, 2022

158

ICON plc Corporate Headquarters

South County Business Park
Leopardstown, Dublin 18
Ireland
T: (IRL) +353 1 291 2000
T: (US) +1 215 616 3000
F: +353 1 247 6260

ICONplc.com/contact

About ICON

ICON is a world-leading clinical research organisation. From molecule to medicine, we advance clinical research
providing outsourced development and commercialisation services to pharmaceutical, biotechnology, medical
device and government and public health organisations. We develop new innovations, drive emerging therapies
forward and improve patient lives. With headquarters in Dublin, Ireland, ICON employed approximately 39,300
employees in 138 locations in 53 countries as at March 31, 2022.