Comparable stake leader
Artisan Partners Limited Partnership
SEC ownership of ICON PLC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001060955.
Disclosed value leader
Artisan Partners Limited Partnership
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- ICLR on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Artisan Partners Limited Partnership
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Artisan Partners Limited Partnership
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001060955
- Issuer location
- Dublin 18, Ireland
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ICON PLC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Artisan Partners Limited ...
Disclosed value leader
Artisan Partners Limited ...
Comparable rows
50/50
Latest evidence
30 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 11%
13D/G row: Artisan Partners Limited Partnership
Showing 1-8 of 50 holder rows.
Quick read
Artisan Partners Limited Partnership leads the comparable SEC ownership view at 11%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Artisan Partners Limited Partnership's linked filing trail.
Comparable ownership
Top 5
Artisan Partners Limited Partnership
11%
WELLINGTON MANAGEMENT GROUP LLP
7.7%
FMR LLC
6.9%
Invesco Ltd.
6.9%
HARRIS ASSOCIATES L P
5.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Artisan Partners Limited Partnership |
13F
13D/G
Company · Artisan Partners Asset Management Inc.
|
11%
from 13D/G
|
$1,500,230,086
8,636,406 shares
|
— | 30 Jun 2026 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
13D/G
Company
|
7.7%
from 13D/G
|
$924,146,579
5,320,054 shares
|
— | 30 Jun 2026 |
| FMR LLC |
13F
13D/G
Company
|
6.9%
from 13D/G
|
$915,681,103
5,271,321 shares
|
— | 30 Jun 2026 |
| Invesco Ltd. |
13F
13D/G
Company
|
6.9%
from 13D/G
|
$914,450,419
5,264,236 shares
|
— | 30 Jun 2026 |
| HARRIS ASSOCIATES L P |
13F
13D/G
Company
|
5.7%
from 13D/G
|
$776,161,642
4,468,146 shares
|
— | 30 Jun 2026 |
| WCM INVESTMENT MANAGEMENT, LLC |
13D/G
|
0.25%
|
$26,956,720
199,946 shares
|
$0 | 30 Jun 2025 |
| Stephen A. Cutler |
3/4/5
Director
|
0.1%
|
$8,252,047
79,278 shares
|
— | 18 Mar 2026 |
| Brave Warrior Advisors, LLC |
13F
Company
|
4.1%
|
$547,761,133
3,153,308 shares
|
— | 30 Jun 2026 |
How to read this table
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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$1,716,091.
Buys
$0
Insiders: 0
Sells
$1,716,091
Insiders: 9
Net
-$1,716,091
Shares: -10,446
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 10,446
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 10,446 | $0 | $1,716,091 | -$1,716,091 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to ICON PLC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
John Dr Climax
Net 12M change
-$1,716,091
Latest report
10 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| John Dr Climax | Director | $30,163,143 | -$138,168 | -0.46% | Mixed | 10 Aug 2026 |
| Stephen A. Cutler | Director | $8,252,047 | Mixed | 18 Mar 2026 | ||
| Ciaran Murray | Director | $3,385,010 | -$439,803 | -11% | Filing P/S | 10 Aug 2026 |
| Linda Grais | Director | $1,019,872 | -$138,169 | -12% | Filing P/S | 10 Aug 2026 |
| Nigel Bernard John Clerkin | Chief Financial Officer | $973,364 | -$372,445 | -28% | Filing P/S | 10 Aug 2026 |
| Barry Edward Balfe | Chief Executive Officer, Director | $793,332 | -$62,676 | -7.3% | Filing P/S | 07 Aug 2026 |
| Ronan Martin Murphy | Director | $636,716 | -$138,168 | -18% | Filing P/S | 10 Aug 2026 |
| Eugene Pacelli McCague | Director | $630,758 | -$138,168 | -18% | Filing P/S | 10 Aug 2026 |
| Julie O'Neill | Director | $581,767 | -$150,326 | -21% | Filing P/S | 10 Aug 2026 |
| Anne Clem Whitaker | Director | $147,469 | -$138,168 | -48% | Filing P/S | 10 Aug 2026 |
| Emer Lyons | Chief Accounting Officer | $78,275 | Mixed | 10 Aug 2026 | ||
| Jeffrey Thomas Elliott | Director | Mixed | 10 Aug 2026 | |||
| Kevin Francis Egan | Director | Mixed | 10 Aug 2026 |
Recent insider transactions for ICON PLC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Anne Clem Whitaker | ICLR | Ordinary Shares | Sale | -48.6% | $138,168 | $164.29 | -841 | 891 | 11 Aug 2026 | Direct |
| Julie O'Neill | ICLR | Ordinary Shares | Sale | -20.6% | $150,326 | $164.29 | -915 | 3,515 | 11 Aug 2026 | Direct |
| Ciaran Murray | ICLR | Ordinary Shares | Sale | -11.6% | $439,803 | $164.29 | -2,677 | 20,452 | 11 Aug 2026 | Direct |
| Ronan Martin Murphy | ICLR | Ordinary Shares | Sale | -17.9% | $138,168 | $164.29 | -841 | 3,847 | 11 Aug 2026 | Direct |
| Eugene Pacelli McCague | ICLR | Ordinary Shares | Sale | -18.1% | $138,168 | $164.29 | -841 | 3,811 | 11 Aug 2026 | Direct |
| Linda Grais | ICLR | Ordinary Shares | Sale | -12% | $138,169 | $164.29 | -841 | 6,162 | 11 Aug 2026 | Direct |
| John Dr Climax | ICLR | Ordinary Shares | Sale | -28.7% | $138,168 | $164.29 | -841 | 2,087 | 11 Aug 2026 | Direct |
| Nigel Bernard John Clerkin | ICLR | Ordinary Shares | Sale | -27.8% | $372,445 | $164.29 | -2,267 | 5,881 | 11 Aug 2026 | Direct |
| Anne Clem Whitaker | ICLR | Ordinary Shares | Options Exercise | 1,732 | 1,732 | 10 Aug 2026 | Direct | |||
| Anne Clem Whitaker | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| Anne Clem Whitaker | ICLR | Restricted Share Units | Options Exercise | -100% | -1,732 | 0 | 10 Aug 2026 | Direct | ||
| Julie O'Neill | ICLR | Ordinary Shares | Options Exercise | 64.2% | 1,732 | 4,430 | 10 Aug 2026 | Direct | ||
| Julie O'Neill | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| Julie O'Neill | ICLR | Restricted Share Units | Options Exercise | -100% | -1,732 | 0 | 10 Aug 2026 | Direct | ||
| Ciaran Murray | ICLR | Ordinary Shares | Options Exercise | 13.1% | 2,677 | 23,129 | 10 Aug 2026 | Direct | ||
| Ciaran Murray | ICLR | Restricted Share Units | Award | 2,047 | 2,047 | 10 Aug 2026 | Direct | |||
| Ciaran Murray | ICLR | Restricted Share Units | Options Exercise | -100% | -2,677 | 0 | 10 Aug 2026 | Direct | ||
| Ronan Martin Murphy | ICLR | Ordinary Shares | Options Exercise | 58.6% | 1,732 | 4,688 | 10 Aug 2026 | Direct | ||
| Ronan Martin Murphy | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| Ronan Martin Murphy | ICLR | Restricted Share Units | Options Exercise | -100% | -1,732 | 0 | 10 Aug 2026 | Direct | ||
| Eugene Pacelli McCague | ICLR | Ordinary Shares | Options Exercise | 59.3% | 1,732 | 4,652 | 10 Aug 2026 | Direct | ||
| Eugene Pacelli McCague | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| Eugene Pacelli McCague | ICLR | Restricted Share Units | Options Exercise | -100% | -1,732 | 0 | 10 Aug 2026 | Direct | ||
| Emer Lyons | ICLR | Restricted Share Units | Award | 5,886 | 5,886 | 10 Aug 2026 | Direct | |||
| Linda Grais | ICLR | Ordinary Shares | Options Exercise | 32.9% | 1,732 | 7,003 | 10 Aug 2026 | Direct | ||
| Linda Grais | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| Linda Grais | ICLR | Restricted Share Units | Options Exercise | -100% | -1,732 | 0 | 10 Aug 2026 | Direct | ||
| John Dr Climax | ICLR | Ordinary Shares | Options Exercise | 144.8% | 1,732 | 2,928 | 10 Aug 2026 | Direct | ||
| John Dr Climax | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| John Dr Climax | ICLR | Restricted Share Units | Options Exercise | -100% | -1,732 | 0 | 10 Aug 2026 | Direct | ||
| Nigel Bernard John Clerkin | ICLR | Ordinary Shares | Options Exercise | 111.4% | 4,293 | 8,148 | 10 Aug 2026 | Direct | ||
| Nigel Bernard John Clerkin | ICLR | Stock Options | Award | 4,793 | 4,793 | 10 Aug 2026 | Direct | |||
| Nigel Bernard John Clerkin | ICLR | Restricted Share Units | Award | 14,164 | 14,164 | 10 Aug 2026 | Direct | |||
| Nigel Bernard John Clerkin | ICLR | Restricted Share Units | Options Exercise | -70% | -4,293 | 1,837 | 10 Aug 2026 | Direct | ||
| Kevin Francis Egan | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| Barry Edward Balfe | ICLR | Ordinary Shares | Sale | -7.37% | $62,676 | $164.07 | -382 | 4,804 | 10 Aug 2026 | Direct |
| Jeffrey Thomas Elliott | ICLR | Restricted Share Units | Award | 1,324 | 1,324 | 10 Aug 2026 | Direct | |||
| Barry Edward Balfe | ICLR | Stock Options | Award | 32,635 | 32,635 | 10 Aug 2026 | Direct | |||
| Barry Edward Balfe | ICLR | Restricted Share Units | Award | 22,258 | 22,258 | 10 Aug 2026 | Direct | |||
| Barry Edward Balfe | ICLR | Ordinary Shares | Options Exercise | 16.3% | 728 | 5,186 | 07 Aug 2026 | Direct | ||
| Barry Edward Balfe | ICLR | Restricted Share Units | Options Exercise | -100% | -728 | 0 | 07 Aug 2026 | Direct | ||
| 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 |
* marks a reported price that did not pass the local price check.