Insider Transactions Reported by 11 Insiders of ICON PLC

Symbol: ICLR on Nasdaq
Location: Dublin 18, Ireland

Quick Takeaways

ICLR - ICON PLC has 11 insiders with reported activity on this page.
No net insider buy/sell flow is currently reported for the last year.
Recent transaction rows are available for direct filing-level review.

What Changed

No meaningful buy/sell imbalance is currently visible in the one-year window.
Activity will update as new Forms 3/4/5 are filed.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 12 Apr 2025.

Buys

Shares: 0

Insiders: 0

Sells

Shares: 0

Insiders: 0

Net

Shares: 0

Insiders: 0

Window (months)	Buy $	Sell $	Net $
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

ICON PLC executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Valuation	Report Date
John Dr Climax	Director	$29,942,215	Mixed	18 Mar 2026
Stephen A. Cutler	Director	$8,252,047	Mixed	18 Mar 2026
Ciaran Murray	Director	$2,128,848	Mixed	18 Mar 2026
Linda Grais	Director	$548,658	Mixed	18 Mar 2026
Barry Edward Balfe	Chief Executive Officer, Director	$464,033	Mixed	18 Mar 2026
Nigel Bernard John Clerkin	Chief Financial Officer	$401,266	Mixed	18 Mar 2026
Ronan Martin Murphy	Director	$307,690	Mixed	18 Mar 2026
Eugene Pacelli McCague	Director	$303,942	Mixed	18 Mar 2026
Julie O'Neill	Director	$280,834	Mixed	18 Mar 2026
Emer Lyons	Chief Accounting Officer	$78,275	Mixed	18 Mar 2026
Anne Clem Whitaker	Director		Mixed	18 Mar 2026

Top shareholders of ICON PLC (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Artisan Partners Limited Partnership	13F 13D/G	Company · Artisan Partners Asset Management Inc.	11% from 13D/G	6,873,977	$1,252,576,089	—	31 Dec 2025	13F 13D/G
WELLINGTON MANAGEMENT GROUP LLP	13D/G 13F	Company	6%	4,637,137	$811,498,975	$0	30 Sep 2025	13D/G 13F
ORBIS INVESTMENT MANAGEMENT LTD	13D/G	—	5.5%	4,208,000	$792,029,760	+$13,894,965	31 Dec 2025	13D/G
Orbis Allan Gray Ltd	13F	Company	5.5%	4,214,661	$767,995,527	—	31 Dec 2025	13F
Invesco Ltd.	13F	Company	4.9%	3,756,896	$684,581,530	—	31 Dec 2025	13F
FMR LLC	13F	Company	4%	3,097,895	$564,498,405	—	31 Dec 2025	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	3.9%	3,001,535	$546,939,708	—	31 Dec 2025	13F
FRANKLIN RESOURCES INC	13F	Company	3.9%	2,993,336	$545,410,252	—	31 Dec 2025	13F
Ninety One UK Ltd	13F	Company	3.8%	2,945,810	$536,785,450	—	31 Dec 2025	13F
HARRIS ASSOCIATES L P	13F	Company	3.3%	2,510,166	$457,402,449	—	31 Dec 2025	13F
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	3.1%	2,357,033	$429,498,553	—	31 Dec 2025	13F
Ruane, Cunniff & Goldfarb L.P.	13F	Company	2.2%	1,679,590	$306,054,890	—	31 Dec 2025	13F
Capital World Investors	13F	Company	2%	1,496,479	$272,688,403	—	31 Dec 2025	13F
WGI DM, LLC	13F	Company	1.8%	1,396,009	$254,380,760	—	31 Dec 2025	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	1.7%	1,272,462	$231,868,026	—	31 Dec 2025	13F
Boston Partners	13F	Company	1.6%	1,258,903	$229,400,369	—	31 Dec 2025	13F
1832 Asset Management L.P.	13F	Company	1.6%	1,204,327	$219,452,466	—	31 Dec 2025	13F
Allspring Global Investments Holdings, LLC	13F	Company	1.4%	1,080,192	$203,799,825	—	31 Dec 2025	13F
Trinity Street Asset Management LLP	13F	Company	1.4%	1,072,428	$195,417,830	—	31 Dec 2025	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	1.4%	1,038,013	$189,146,980	—	31 Dec 2025	13F
First Pacific Advisors, LP	13F	Company	1.3%	980,804	$178,722,105	—	31 Dec 2025	13F
LYRICAL ASSET MANAGEMENT LP	13F	Company	1.3%	967,961	$176,381,853	—	31 Dec 2025	13F
EARNEST PARTNERS LLC	13F	Company	1.2%	890,076	$162,189,649	—	31 Dec 2025	13F
NORGES BANK	13F	Company	1.1%	878,462	$160,073,346	—	31 Dec 2025	13F
SEI INVESTMENTS CO	13F	Company	1%	785,937	$143,213,292	—	31 Dec 2025	13F
BRANDES INVESTMENT PARTNERS, LP	13F	Company	1%	776,732	$141,538,361	—	31 Dec 2025	13F
JPMORGAN CHASE & CO	13F	Company	1%	767,924	$139,931,112	—	31 Dec 2025	13F
VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V.	13F	Company	0.97%	743,548	$135,489,317	—	31 Dec 2025	13F
JENNISON ASSOCIATES LLC	13F	Company	0.88%	677,981	$123,541,699	—	31 Dec 2025	13F
D. E. Shaw & Co., Inc.	13F	Company	0.85%	653,319	$119,047,788	—	31 Dec 2025	13F
EQUITY INVESTMENT CORP	13F	Company	0.81%	623,188	$113,557,275	—	31 Dec 2025	13F
Clearbridge Investments, LLC	13F	Company	0.8%	616,991	$112,428,100	—	31 Dec 2025	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.79%	609,665	$111,093,156	—	31 Dec 2025	13F
Stephens Investment Management Group LLC	13F	Company	0.71%	542,996	$98,944,731	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.7%	538,637	$98,150,434	—	31 Dec 2025	13F
BAMCO INC /NY/	13F	Company	0.7%	534,248	$97,350,671	—	31 Dec 2025	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.68%	522,970	$95,298,612	—	31 Dec 2025	13F
Fisher Funds Management LTD	13F	Company	0.67%	513,102	$93,207,543	—	31 Dec 2025	13F
ALTRINSIC GLOBAL ADVISORS LLC	13F	Company	0.66%	507,824	$92,535,689	—	31 Dec 2025	13F
FIDUCIARY MANAGEMENT INC /WI/	13F	Company	0.63%	480,996	$87,647,091	—	31 Dec 2025	13F
River Road Asset Management, LLC	13F	Company	0.62%	475,413	$86,629,757	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0.62%	473,639	$86,306,736	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.62%	473,175	$86,222,039	—	31 Dec 2025	13F
Ninety One North America, Inc.	13F	Company	0.59%	455,399	$82,982,811	—	31 Dec 2025	13F
VOYA INVESTMENT MANAGEMENT LLC	13F	Company	0.57%	438,319	$79,870,569	—	31 Dec 2025	13F
Brandywine Global Investment Management, LLC	13F	Company	0.52%	399,813	$71,680,573	—	31 Dec 2025	13F
BlackRock, Inc.	13F	Company	0.49%	377,843	$68,850,551	—	31 Dec 2025	13F
LAZARD ASSET MANAGEMENT LLC	13F	Company	0.49%	372,447	$67,867,283	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	0.47%	361,206	$65,818,957	—	31 Dec 2025	13F
SAMLYN CAPITAL, LLC	13F	Company	0.44%	337,681	$61,532,231	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for ICON PLC

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Shares Owned	Date	Ownership
Barry Edward Balfe	ICLR	Ordinary Shares	4,458	18 Mar 2026	Direct
Nigel Bernard John Clerkin	ICLR	Ordinary Shares	3,855	18 Mar 2026	Direct
Stephen A. Cutler	ICLR	Ordinary Shares	79,278	18 Mar 2026	Direct
Linda Grais	ICLR	Ordinary Shares	5,271	18 Mar 2026	Direct
Emer Lyons	ICLR	Ordinary Shares	752	18 Mar 2026	Direct
Julie O'Neill	ICLR	Ordinary Shares	2,698	18 Mar 2026	Direct
Eugene Pacelli McCague	ICLR	Ordinary Shares	2,920	18 Mar 2026	Direct
Ronan Martin Murphy	ICLR	Ordinary Shares	2,956	18 Mar 2026	Direct
John Dr Climax	ICLR	Ordinary Shares	1,310	18 Mar 2026	Held by White Poplar Limited
John Dr Climax	ICLR	Ordinary Shares	285,151	18 Mar 2026	Held by Poplar Limited
John Dr Climax	ICLR	Ordinary Shares	1,196	18 Mar 2026	Direct
Ciaran Murray	ICLR	Ordinary Shares	20,452	18 Mar 2026	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.