Key facts
- 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.
Insider Transactions Reported by 11 Insiders of ICON PLC
- Symbol
- ICLR on Nasdaq
- Location
- Dublin 18, Ireland
Change
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Research use
- 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.
Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 24 May 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
ICON PLC executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| John Dr Climax | Director | $29,942,215 | Mixed | 14 May 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 | 14 May 2026 | ||
| Eugene Pacelli McCague | Director | $303,942 | Mixed | 14 May 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 first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings 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
|
8,278,945
|
$916,148,054 | — | 31 Mar 2026 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
13D/G
|
Company |
7.7%
from 13D/G
|
5,913,037
|
$654,336,675 | — | 31 Mar 2026 | |
| HARRIS ASSOCIATES L P |
13F
13D/G
|
Company |
5.7%
from 13D/G
|
4,351,317
|
$481,516,739 | — | 31 Mar 2026 | |
| FMR LLC |
13F
13D/G
|
Company |
5.5%
from 13D/G
|
4,174,006
|
$461,895,449 | — | 31 Mar 2026 | |
| Invesco Ltd. |
13F
13D/G
|
Company |
5.1%
from 13D/G
|
3,878,869
|
$429,235,666 | — | 31 Mar 2026 | |
| WCM INVESTMENT MANAGEMENT, LLC |
13D/G
|
— |
0.25%
|
199,946
|
$26,956,720 | $0 | 30 Jun 2025 | |
| Stephen A. Cutler |
3/4/5
|
Director |
0.1%
|
79,278
|
$8,252,047 | — | 18 Mar 2026 | |
| Ciaran Murray |
3/4/5
|
Director |
0.03%
|
20,452
|
$2,128,848 | — | 18 Mar 2026 | |
| Linda Grais |
3/4/5
|
Director |
0.01%
|
5,271
|
$548,658 | — | 18 Mar 2026 | |
| Barry Edward Balfe |
3/4/5
|
Chief Executive Officer, Director |
0.01%
|
4,458
|
$464,033 | — | 18 Mar 2026 | |
| Nigel Bernard John Clerkin |
3/4/5
|
Chief Financial Officer |
0.01%
|
3,855
|
$401,266 | — | 18 Mar 2026 | |
| Julie O'Neill |
3/4/5
|
Director |
0%
|
2,698
|
$280,834 | — | 18 Mar 2026 | |
| Emer Lyons |
3/4/5
|
Chief Accounting Officer |
0%
|
752
|
$78,275 | — | 18 Mar 2026 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
4.3%
|
3,311,771
|
$366,480,578 | — | 31 Mar 2026 | |
| Brave Warrior Advisors, LLC |
13F
|
Company |
3.9%
|
2,996,811
|
$331,627,105 | — | 31 Mar 2026 | |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ |
13F
|
Company |
3.6%
|
2,727,824
|
$304,904,705 | — | 31 Mar 2026 | |
| Sachem Head Capital Management LP |
13F
|
Company |
2.8%
|
2,105,000
|
$232,939,300 | — | 31 Mar 2026 | |
| GREENHAVEN ASSOCIATES INC |
13F
|
Company |
2.6%
|
2,002,411
|
$221,586,801 | — | 31 Mar 2026 | |
| Ruane, Cunniff & Goldfarb L.P. |
13F
|
Company |
2.1%
|
1,634,611
|
$180,886,053 | — | 31 Mar 2026 | |
| BRANDES INVESTMENT PARTNERS, LP |
13F
|
Company |
1.9%
|
1,435,053
|
$158,804,315 | — | 31 Mar 2026 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
1.8%
|
1,344,595
|
$245,012,101 | — | 31 Mar 2026 | |
| Madison Avenue Partners, LP |
13F
|
Company |
1.7%
|
1,282,838
|
$141,958,853 | — | 31 Mar 2026 | |
| Trinity Street Asset Management LLP |
13F
|
Company |
1.6%
|
1,208,148
|
$133,693,657 | — | 31 Mar 2026 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
1.6%
|
1,198,555
|
$132,632,096 | — | 31 Mar 2026 | |
| 1832 Asset Management L.P. |
13F
|
Company |
1.6%
|
1,193,240
|
$132,043,938 | — | 31 Mar 2026 | |
| Capital World Investors |
13F
|
Company |
1.4%
|
1,104,831
|
$122,260,598 | — | 31 Mar 2026 | |
| EQUITY INVESTMENT CORP |
13F
|
Company |
1.4%
|
1,096,395
|
$121,327,085 | — | 31 Mar 2026 | |
| First Pacific Advisors, LP |
13F
|
Company |
1.3%
|
991,075
|
$109,672,359 | — | 31 Mar 2026 | |
| LYRICAL ASSET MANAGEMENT LP |
13F
|
Company |
1.2%
|
938,204
|
$103,821,655 | — | 31 Mar 2026 | |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. |
13F
|
Company |
1.2%
|
918,713
|
$101,664,781 | — | 31 Mar 2026 | |
| EARNEST PARTNERS LLC |
13F
|
Company |
1.2%
|
885,790
|
$98,021,521 | — | 31 Mar 2026 | |
| Holocene Advisors, LP |
13F
|
Company |
1.1%
|
840,845
|
$93,047,908 | — | 31 Mar 2026 | |
| Boston Partners |
13F
|
Company |
1.1%
|
835,139
|
$92,419,731 | — | 31 Mar 2026 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
1.1%
|
816,085
|
$86,495,975 | — | 31 Mar 2026 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1%
|
788,828
|
$87,261,794 | — | 31 Mar 2026 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.99%
|
757,489
|
$83,824,228 | — | 31 Mar 2026 | |
| LAKEWOOD CAPITAL MANAGEMENT, LP |
13F
|
Company |
0.98%
|
747,700
|
$82,740,482 | — | 31 Mar 2026 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.83%
|
630,621
|
$69,784,519 | — | 31 Mar 2026 | |
| SOUND SHORE MANAGEMENT INC /CT/ |
13F
|
Company |
0.82%
|
626,958
|
$69,379,172 | — | 31 Mar 2026 | |
| THRIVENT FINANCIAL FOR LUTHERANS |
13F
|
Company |
0.82%
|
622,366
|
$68,871,000 | — | 31 Mar 2026 | |
| UBS Group AG |
13F
|
Company |
0.8%
|
612,265
|
$67,753,245 | — | 31 Mar 2026 | |
| Stephens Investment Management Group LLC |
13F
|
Company |
0.78%
|
599,176
|
$66,304,816 | — | 31 Mar 2026 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.71%
|
543,487
|
$60,142,271 | — | 31 Mar 2026 | |
| Russell Investments Group, Ltd. |
13F
|
Company |
0.67%
|
514,306
|
$56,913,173 | — | 31 Mar 2026 | |
| STATE STREET CORP |
13F
|
Company |
0.6%
|
457,209
|
$50,594,748 | — | 31 Mar 2026 | |
| Impactive Capital LP |
13F
|
Company |
0.59%
|
450,540
|
$49,856,756 | — | 31 Mar 2026 | |
| BAMCO INC /NY/ |
13F
|
Company |
0.56%
|
426,805
|
$47,230,241 | — | 31 Mar 2026 | |
| BlackRock, Inc. |
13F
|
Company |
0.54%
|
413,596
|
$45,768,536 | — | 31 Mar 2026 | |
| Aberdeen Group plc |
13F
|
Company |
0.52%
|
399,290
|
$44,185,432 | — | 31 Mar 2026 | |
| River Road Asset Management, LLC |
13F
|
Company |
0.48%
|
369,715
|
$40,912,662 | — | 31 Mar 2026 |
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 | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Ronan Martin Murphy | ICLR | Stock Options | Award | 5,005 | 5,005 | 14 May 2026 | Direct | |||
| Ronan Martin Murphy | ICLR | Stock Options | Disposed to Issuer | -100% | -5,005 | 0 | 14 May 2026 | Direct | ||
| John Dr Climax | ICLR | Stock Options | Award | 5,005 | 5,005 | 14 May 2026 | Direct | |||
| John Dr Climax | ICLR | Stock Options | Disposed to Issuer | -100% | -5,005 | 0 | 14 May 2026 | Direct | ||
| Eugene Pacelli McCague | ICLR | Stock Options | Award | 3,255 | 3,255 | 14 May 2026 | Direct | |||
| Eugene Pacelli McCague | ICLR | Stock Options | Disposed to Issuer | -100% | -3,255 | 0 | 14 May 2026 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.