ICLR ICON plc
ICON plc (ICLR) Institutional Ownership
What the institutions did with ICLR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Artisan Partners Limited Partnership | 8.6M | 10.8% |
| WELLINGTON MANAGEMENT GROUP LLP | 5.3M | 6.6% |
| FMR LLC | 5.3M | 6.6% |
| Invesco Ltd. | 5.3M | 6.6% |
| HARRIS ASSOCIATES L P | 4.5M | 5.6% |
| Brave Warrior Advisors, LLC | 3.2M | 3.9% |
| GREENHAVEN ASSOCIATES INC | 3.1M | 3.9% |
| PRINCIPAL FINANCIAL GROUP INC | 3.0M | 3.7% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2.1M | 2.6% |
| Ruane, Cunniff & Goldfarb L.P. | 2.0M | 2.6% |
| Boston Partners | 1.6M | 2.0% |
| Trinity Street Asset Management LLP | 1.5M | 1.9% |
| ALLIANCEBERNSTEIN L.P. | 1.4M | 1.7% |
| D. E. Shaw & Co., Inc. | 1.4M | 1.7% |
| DIMENSIONAL FUND ADVISORS LP | 1.3M | 1.6% |
| EARNEST PARTNERS LLC | 1.2M | 1.5% |
| Maple Rock Capital Partners Inc. | 1.2M | 1.5% |
| 1832 Asset Management L.P. | 1.2M | 1.5% |
| BRANDES INVESTMENT PARTNERS, LP | 1.2M | 1.5% |
| Capital World Investors | 1.1M | 1.4% |
| AMERIPRISE FINANCIAL INC | 979.6K | 1.2% |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | 961.7K | 1.2% |
| SEI INVESTMENTS CO | 902.2K | 1.1% |
| EQUITY INVESTMENT CORP | 888.9K | 1.1% |
| LYRICAL ASSET MANAGEMENT LP | 881.2K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Sachem Head Capital Management LP | Sold Out | 2.1M | 0 | -2.1M |
| Invesco Ltd. | Increased | 3.9M | 5.3M | +1.4M |
| Madison Avenue Partners, LP | Sold Out | 1.3M | 0 | -1.3M |
| GREENHAVEN ASSOCIATES INC | Increased | 2.0M | 3.1M | +1.1M |
| FMR LLC | Increased | 4.2M | 5.3M | +1.1M |
| AMERIPRISE FINANCIAL INC | Increased | 102.2K | 979.6K | +877.4K |
| Maple Rock Capital Partners Inc. | Increased | 335.3K | 1.2M | +864.3K |
| Holocene Advisors, LP | Sold Out | 840.8K | 0 | -840.8K |
| Boston Partners | Increased | 835.1K | 1.6M | +785.6K |
| SOUND SHORE MANAGEMENT INC /CT/ | Sold Out | 627.0K | 0 | -627.0K |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Reduced | 2.7M | 2.1M | -622.7K |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 5.9M | 5.3M | -593.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 788.8K | 1.3M | +481.4K |
| Impactive Capital LP | Sold Out | 450.5K | 0 | -450.5K |
| Ruane, Cunniff & Goldfarb L.P. | Increased | 1.6M | 2.0M | +413.5K |
| First Pacific Advisors, LP | Reduced | 991.1K | 606.5K | -384.6K |
| JANE STREET GROUP, LLC | Increased | 2.5K | 374.8K | +372.4K |
| Zurich Insurance Group Ltd/FI | Increased | 109.9K | 481.2K | +371.3K |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 3.3M | 3.0M | -360.8K |
| Artisan Partners Limited Partnership | Increased | 8.3M | 8.6M | +357.5K |
| EARNEST PARTNERS LLC | Increased | 885.8K | 1.2M | +356.8K |
| Point72 Asset Management, L.P. | Increased | 9.9K | 365.9K | +356.1K |
| Trinity Street Asset Management LLP | Increased | 1.2M | 1.5M | +327.3K |
| Woodline Partners LP | New | 0 | 327.2K | +327.2K |
| VOYA INVESTMENT MANAGEMENT LLC | New | 0 | 289.9K | +289.9K |
| BRANDES INVESTMENT PARTNERS, LP | Reduced | 1.4M | 1.2M | -249.3K |
| NEW YORK STATE COMMON RETIREMENT FUND | Reduced | 345.7K | 122.9K | -222.8K |
| Sio Capital Management, LLC | Reduced | 306.4K | 88.2K | -218.2K |
| EQUITY INVESTMENT CORP | Reduced | 1.1M | 888.9K | -207.5K |
| Walleye Capital LLC | Sold Out | 196.6K | 0 | -196.6K |
| Soleus Capital Management, L.P. | Sold Out | 192.0K | 0 | -192.0K |
| KENSICO CAPITAL MANAGEMENT CORP | New | 0 | 188.0K | +188.0K |
| Thrivent Financial for Lutherans | Increased | 622.4K | 802.4K | +180.0K |
| GOLDMAN SACHS GROUP INC | Reduced | 630.6K | 450.7K | -179.9K |
| LAKEWOOD CAPITAL MANAGEMENT, LP | Reduced | 747.7K | 585.2K | -162.5K |
| MARSHALL WACE, LLP | Increased | 14.4K | 175.4K | +161.1K |
| D. E. Shaw & Co., Inc. | Increased | 1.2M | 1.4M | +158.6K |
| BROWN CAPITAL MANAGEMENT LLC | Sold Out | 158.0K | 0 | -158.0K |
| Brave Warrior Advisors, LLC | Increased | 3.0M | 3.2M | +156.5K |
| PRICE T ROWE ASSOCIATES INC /MD/ | New | 0 | 154.0K | +154.0K |
| SEI INVESTMENTS CO | Increased | 757.5K | 902.2K | +144.7K |
| CANADA PENSION PLAN INVESTMENT BOARD | Increased | 102.7K | 246.0K | +143.3K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | Reduced | 150.8K | 13.2K | -137.6K |
| Parkwood LLC | New | 0 | 134.8K | +134.8K |
| Balyasny Asset Management L.P. | Reduced | 136.4K | 4.9K | -131.6K |
| MOORE CAPITAL MANAGEMENT, LP | Reduced | 147.2K | 19.4K | -127.8K |
| BlackRock, Inc. | Increased | 413.6K | 534.9K | +121.3K |
| Stephens Investment Management Group LLC | Increased | 599.2K | 720.3K | +121.1K |
| MORGAN STANLEY | Increased | 293.1K | 414.2K | +121.1K |
| HARRIS ASSOCIATES L P | Increased | 4.4M | 4.5M | +116.8K |
| Philosophy Capital Management LLC | Sold Out | 111.0K | 0 | -111.0K |
| Running Oak Capital LLC | Sold Out | 108.6K | 0 | -108.6K |
| AVIVA PLC | Sold Out | 106.5K | 0 | -106.5K |
| KINGDON CAPITAL MANAGEMENT, L.L.C. | Sold Out | 105.3K | 0 | -105.3K |
| CITADEL ADVISORS LLC | Reduced | 251.6K | 148.6K | -103.0K |
| Steamboat Capital Partners, LLC | Sold Out | 100.3K | 0 | -100.3K |
| Oribel Capital Management, LP | New | 0 | 98.1K | +98.1K |
| TEACHER RETIREMENT SYSTEM OF TEXAS | New | 0 | 97.1K | +97.1K |
| Meridiem Capital Partners LP | Sold Out | 93.9K | 0 | -93.9K |
| CAMBIAR INVESTORS LLC | Sold Out | 87.0K | 0 | -87.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.