ICON PLC (ICLR) Stock Institutional Trading Activity


ICON PLC (ICLR) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Polen Capital Management, Cullen Value Fund, Greenhaven Associates, Muhlenkamp & Co, and Sequoia Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2021Renaissance Technologies LLCSell-136,8001,417,758$439,080
Q4 2021Polen Capital ManagementSell-73,0911,586,759$491,419
Q3 2021Renaissance Technologies LLCSell-434,2601,554,558$407,325
Q3 2021Polen Capital ManagementBuy877,3161,659,850$434,914
Q2 2021Fundsmith Investment ServicesBuy22,27522,275$4,604
Q2 2021Polen Capital ManagementBuy14,984782,534$161,758
Q2 2021Renaissance Technologies LLCSell-80,9001,988,818$411,109
Q1 2021Polen Capital ManagementBuy143,853767,550$150,724
Q1 2021Renaissance Technologies LLCSell-266,6582,069,718$406,431
Q4 2020Polen Capital ManagementBuy79,206623,697$121,608
Q4 2020Renaissance Technologies LLCSell-167,7432,336,376$455,547
Q3 2020Polen Capital ManagementBuy160,086544,491$104,047
Q3 2020Renaissance Technologies LLCSell-64,6002,504,119$478,512
Q2 2020Polen Capital ManagementBuy67,186384,405$64,757
Q2 2020Renaissance Technologies LLCBuy67,4002,568,719$432,726
Q1 2020Polen Capital ManagementBuy57,091317,219$43,142
Q1 2020Renaissance Technologies LLCBuy154,2602,501,319$340,179
Q4 2019Polen Capital ManagementBuy36,370260,128$44,802
Q4 2019Renaissance Technologies LLCBuy36,0992,347,059$404,234
Q3 2019Polen Capital ManagementBuy74,704223,758$32,969
Q3 2019Renaissance Technologies LLCBuy46,7002,310,960$340,497
Q2 2019Polen Capital ManagementBuy34,037149,054$22,950
Q2 2019Renaissance Technologies LLCBuy43,1002,264,260$348,628
Q1 2019Polen Capital ManagementBuy16,403115,017$15,709
Q1 2019Renaissance Technologies LLCBuy325,8602,221,160$303,366
Q4 2018Polen Capital ManagementBuy16,11498,614$12,742
Q4 2018Renaissance Technologies LLCBuy9,7001,895,300$244,892
Q3 2018Polen Capital ManagementBuy17,28282,500$12,684
Q3 2018Renaissance Technologies LLCSell-37,1601,885,600$289,911
Q2 2018Polen Capital ManagementBuy5,29165,218$8,643

Frequently asked questions about ICLR activity

  • Which institutional owners are buying ICLR?

    Institutional owners buying ICLR include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ICLR activity?

    "Buy" means an investor increased their reported position in ICLR compared to the prior reporting period. This reflects growing exposure to ICON PLC (ICLR) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ICLR increasing?

    Institutional interest in ICLR can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.