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
Q1 2018Polen Capital ManagementBuy14,13459,927$7,080
Q1 2018Renaissance Technologies LLCBuy105,4531,922,760$227,155
Q4 2017Polen Capital ManagementBuy19,67145,793$5,136
Q4 2017Renaissance Technologies LLCBuy495,2471,817,307$203,811
Q3 2017Polen Capital ManagementBuy18,58326,122$2,975
Q3 2017Renaissance Technologies LLCBuy168,9001,322,060$150,556
Q2 2017Polen Capital ManagementBuy7,5397,539$737
Q2 2017Renaissance Technologies LLCBuy197,3001,153,160$112,768
Q1 2017Renaissance Technologies LLCBuy684,760955,860$76,201
Q4 2016Renaissance Technologies LLCBuy58,900271,100$20,387
Q3 2016Renaissance Technologies LLCBuy58,800212,200$16,418
Q2 2016Renaissance Technologies LLCBuy87,700153,400$10,740
Q1 2016Renaissance Technologies LLCSell-48,00065,700$4,934
Q4 2015Renaissance Technologies LLCSell-263,760113,700$8,834
Q3 2015Renaissance Technologies LLCSell-161,740377,460$26,788
Q2 2015Renaissance Technologies LLCBuy10,940539,200$36,288
Q1 2015Renaissance Technologies LLCBuy3,500528,260$37,258
Q4 2014Renaissance Technologies LLCSell-165,340524,760$26,758
Q3 2014Renaissance Technologies LLCBuy76,500690,100$39,494
Q2 2014Renaissance Technologies LLCSell-98,660613,600$28,907
Q1 2014Renaissance Technologies LLCSell-118,600712,260$33,868
Q4 2013Renaissance Technologies LLCBuy335,700830,860$33,580
Q3 2013Renaissance Technologies LLCBuy212,000495,160$20,267
Q2 2013First Eagle U.S. ValueBuy12,00012,000$425
Q2 2013Renaissance Technologies LLCBuy283,160283,160$10,032

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.