ICLR ICON plc

NASDAQ
$172.33

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.

Managers compared
494
filed both this quarter and last
Managers holding
415
+2 on the quarter
Buyers
228
81 opened new
Sellers
217
79 sold out entirely
Buyer share
51.2%
of managers who traded it
Breadth
+2.5
net buyers, as a share of those trading

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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Ownership map

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.

Cut Unchanged Added Color saturates at ±50%.

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.