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ICON plc 13F holders

425 funds reported a position in ICON plc in their 13F for the quarter ended 30 June 2026, together 80.3 million shares worth $13.86 billion. Against the quarter before, 71 opened a position, 145 added, 140 trimmed and 80 sold out; together they bought a net 1.3 million shares. The largest holders: Artisan Partners Limited Partnership, Wellington Management Group LLP and FMR LLC.

Funds holding425+2 on Q1 2026
Shares they held80.3Mworth $13.86 billion
Net bought on the quarter1.3M sharesabout $227.3 million at the funds' values
Funds buying to selling216 to 220opened or added, to cut or sold
Opened 71Added 145Held 66Trimmed 140Sold out 80
Opened: 71 fundsAdded: 145 fundsHeld: 66 fundsTrimmed: 140 fundsSold out: 80 funds

What each fund did in ICLR against its 13F for the quarter before; a change under 0.1% of a holding counts as held

Q3 2024: 664 funds, 80.1 million shares664Q3 2024Q4 2024: 599 funds, 76.4 million shares599Q4 2024Q1 2025: 563 funds, 75.9 million shares563Q1 2025Q2 2025: 492 funds, 77.2 million shares492Q2 2025Q3 2025: 517 funds, 78.1 million shares517Q3 2025Q4 2025: 518 funds, 77.4 million shares518Q4 2025Q1 2026: 423 funds, 78.2 million shares423Q1 2026Q2 2026: 425 funds, 80.3 million shares425Q2 2026

Funds reporting a position in ICLR in their 13F, each quarter; hover a bar for the shares they held

Filed so far for the quarter to 30 September 2026

5,013 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 183 reported a position in ICON plc: 13 opened one, 66 added, 60 trimmed and 18 sold out, a net 37,163 shares bought.

FundChange in sharesShares nowStatusFiling
Dimensional Fund Advisors LP+402,3061,672,536added13F
Russell Investments Group, Ltd.-93,949505,249trimmed13F
Acadian Asset Management LLC+88,62788,627new13F
Equity Investment Corp.-65,267823,608trimmed13F
Trinity Street Asset Management LLP-48,0871,487,375trimmed13F
Swedbank AB+34,60034,600new13F
Concurrent Investment Advisors, LLC-33,5462,936trimmed13F
Greenhaven Associates Inc.-31,6003,069,015trimmed13F
Aberdeen Group plc+26,803421,165added13F
Deutsche Bank AG-20,12525,315trimmed13F
State of Michigan Retirement System-20,00065,070trimmed13F
Gateway Investment Advisers LLC-18,42035,137trimmed13F
Squarepoint Ops LLC-18,06714,933trimmed13F
Barclays PLC+17,74522,565added13F
Citigroup Inc.+13,83524,179added13F
Principal Financial Group Inc.-13,5722,937,402trimmed13F
Riverwater Partners LLC+13,01613,016new13F
Professional Financial Advisors, LLC+11,52911,529new13F
VELA Investment Management, LLC+10,40522,597added13F
Hudson Edge Investment Partners Inc.+9,963376,440added13F
Allspring Global Investments Holdings, LLC+10,38952,155added13F
State of Wyoming-9,05513,173trimmed13F
Cambridge Investment Research Advisors, Inc.-8,2358,387trimmed13F
Amundi+7,44248,870added13F
Mackenzie Financial Corp.-7,0929,362trimmed13F

The largest moves in the name among the funds that have filed, against each fund's previous 13F.

The well-known funds

Of the 44 funds followed here, 1 reported a position in ICON plc in a 13F for the quarter ended 30 September 2026, and 7 more in a 13F for an earlier quarter, the latest each has filed. The largest: FMR LLC, 5.3 million shares worth $915.7 million, 0.0% of its reported book (its 13F for the quarter ended 30 June 2026). Sold out: Two Sigma Investments. In the quarter, 1 fund added or opened a position and 0 trimmed or sold out; together they bought a net 3,782 shares, about $642,902 at the funds' own value per share on 30 September 2026. A change under 0.1% of a holding counts as held.

FundSharesValueOf its bookChange on the quarterStatusQuarter endedFiling
FMR LLC5,271,321$915.7 million0.0%+1,097,315added30 June 2026, an earlier quarter13F
Harris Associates4,468,146$776.2 million1.0%+116,829added30 June 2026, an earlier quarter13F
Norges Bank820,998$142.6 million0.0%held30 June 2026, an earlier quarter13F
Point72 Asset Management365,945$63.6 million0.1%+356,082added30 June 2026, an earlier quarter13F
Citadel Advisors148,573$25.8 million0.0%-103,034trimmed30 June 2026, an earlier quarter13F
Geode Capital Management102,421$17.4 million0.0%+3,782added30 September 202613F
Millennium Management48,483$8.4 million0.0%-2,282trimmed30 June 2026, an earlier quarter13F
Renaissance Technologies4,500$781,6950.0%+4,500new30 June 2026, an earlier quarter13F
Two Sigma Investments0$00.0%-28,934exited30 June 2026, an earlier quarter13F
Value is what the fund reported.
Read moreChange is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.

The largest holders

FundSharesShare of allValueOf its bookChange in sharesFiling
Artisan Partners Limited Partnership8,636,40610.76%$1.50 billion2.45%+357,46113F
Wellington Management Group LLP5,320,0546.63%$924.1 million0.16%-592,98313F
FMR LLC5,271,3216.57%$915.7 million0.04%+1,097,31513F
Invesco Ltd.5,264,2366.56%$914.5 million0.07%+1,385,36713F
Harris Associates L P4,468,1465.57%$776.2 million1.03%+116,82913F
Brave Warrior Advisors, LLC3,153,3083.93%$547.8 million11.94%+156,49713F
Greenhaven Associates Inc.3,100,6153.86%$538.6 million6.22%+1,098,20413F
Principal Financial Group Inc.2,950,9743.68%$512.6 million0.25%-360,79713F
Massachusetts Financial Services Co.2,105,1712.62%$369.4 million0.12%-622,65313F
Ruane, Cunniff & Goldfarb L.P.2,048,0872.55%$355.8 million5.54%+413,47613F
Boston Partners1,620,7302.02%$281.4 million0.25%+785,59113F
Trinity Street Asset Management LLP1,535,4621.91%$266.7 million13.74%+327,31413F
D. E. Shaw & Co., Inc.1,357,1431.69%$235.7 million0.15%+158,58813F
Dimensional Fund Advisors LP1,270,2301.58%$220.6 million0.04%+481,40213F
Earnest Partners LLC1,242,6391.55%$215.9 million0.78%+356,84913F
Maple Rock Capital Partners Inc.1,199,6001.49%$208.4 million4.09%+864,30013F
1832 Asset Management L.P.1,194,8601.49%$207.6 million0.26%+1,62013F
Brandes Investment Partners, LP1,185,7741.48%$206.0 million1.44%-249,27913F
Capital World Investors1,106,0561.38%$192.1 million0.02%+1,22513F
Ameriprise Financial Inc.979,5961.22%$170.2 million0.03%+877,35913F
Van Lanschot Kempen Investment Management N.V.961,6651.20%$167.1 million1.28%+42,95213F
Sei Investments Co.902,1851.12%$156.7 million0.14%+144,69613F
Equity Investment Corp.888,8751.11%$154.4 million2.95%-207,52013F
Lyrical Asset Management LP881,1791.10%$153.1 million1.94%-57,02513F
AllianceBernstein L.P.1,378,1961.72%$152.5 million0.05%+33,60113F
Norges Bank820,9981.02%$142.6 million0.01%13F
Thrivent Financial for Lutherans802,4151.00%$139.4 million0.24%+180,04913F
Franklin Resources Inc.771,0840.96%$136.2 million0.03%-45,00113F
Stephens Investment Management Group LLC720,2610.90%$125.1 million1.34%+121,08513F
First Pacific Advisors, LP606,5230.76%$105.4 million1.32%-384,55213F
Russell Investments Group, Ltd.599,1980.75%$104.1 million0.09%+84,89213F
Lakewood Capital Management, LP585,2000.73%$101.7 million5.27%-162,50013F
UBS Group AG546,4370.68%$94.9 million0.01%-65,82813F
BlackRock, Inc.534,9350.67%$92.9 million0.00%+121,33913F
Bank of America Corp.503,0990.63%$87.4 million0.01%-40,38813F
Zurich Insurance Group Ltd481,2080.60%$83.6 million0.58%+371,28213F
Goldman Sachs Group Inc.450,7170.56%$78.3 million0.01%-179,90413F
State Street Corp.437,8530.55%$76.1 million0.00%-19,35613F
Morgan Stanley414,1920.52%$71.9 million0.00%+121,05013F
Aberdeen Group plc394,3620.49%$68.5 million0.10%-4,92813F
Bamco Inc.376,8050.47%$65.5 million0.10%-50,00013F
Jane Street Group, LLC374,8000.47%$65.1 million0.04%+372,35013F
Hudson Edge Investment Partners Inc.366,4770.46%$63.7 million8.70%+47,47413F
Point72 Asset Management, L.P.365,9450.46%$63.6 million0.10%+356,08213F
Woodline Partners LP327,1840.41%$56.8 million0.18%new13F
Eagle Health Investments LP308,1430.38%$53.5 million8.87%-50,35713F
Zuckerman Investment Group, LLC294,4390.37%$51.1 million4.35%+13,44713F
Voya Investment Management LLC289,9180.36%$50.4 million0.05%new13F
River Road Asset Management, LLC285,1370.36%$49.5 million0.55%-84,57813F
Canada Pension Plan Investment Board246,0180.31%$42.7 million0.02%+143,27513F
The 50 largest of the 425 funds that reported a position in ICLR in their 13F for the quarter ended 30 June 2026, by the value each reported.
Read moreShare of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?

Options the funds reported on ICLR

FundOptionShares under the optionsValue of those sharesQuarter endedFiling
Citadel AdvisorsCalls82,900$14.4 million30 June 202613F
Citadel AdvisorsPuts58,100$10.1 million30 June 202613F
Millennium ManagementCalls40,200$7.0 million30 June 202613F
Two Sigma InvestmentsPuts3,300$573,24330 June 202613F
Two Sigma InvestmentsCalls1,500$260,56530 June 202613F
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
Read moreThey are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.

Schedule 13D and 13G filed on the name, last twelve months

FiledScheduleWhoHoldingOf the classEvent dateRule or purposeFiling
5 November 202613G/AFMR LLC and 3 others6.6 million8.5%30 September 2026passive, institutional (13d-1(b))EDGAR
13 August 202613G/AInvesco Ltd. and 1 other5.3 million6.9%30 June 2026passive, institutional (13d-1(b))EDGAR
6 August 202613G/AFMR LLC and 3 others5.3 million6.9%30 June 2026passive, institutional (13d-1(b))EDGAR
15 May 202613G/AOrbis Investment Management Ltd and 3 others00.0%31 March 2026passive, institutional (13d-1(b))EDGAR
15 May 202613G/AWellington Management Group LLP and 7 others5.9 million7.7%31 March 2026passive, institutional (13d-1(b))EDGAR
15 May 202613GHarris Associates L P and 3 others4.4 million5.7%31 March 2026passive, institutional (13d-1(b))EDGAR
6 May 202613GInvesco Ltd. and 1 other3.9 million5.1%31 March 2026passive, institutional (13d-1(b))EDGAR
6 May 202613GFMR LLC and 3 others4.2 million5.5%31 March 2026passive, institutional (13d-1(b))EDGAR
6 March 202613G/AArtisan Partners Asset Management Inc. and 9 others8.4 million10.9%27 February 2026passive, institutional (13d-1(b))EDGAR
17 February 202613G/AOrbis Investment Management Ltd and 3 others4.2 million5.5%31 December 2025passive, institutional (13d-1(b))EDGAR
14 November 202513GOrbis Investment Management Ltd and 3 others4.1 million5.3%30 September 2025passive, institutional (13d-1(b))EDGAR
12 November 202513GWellington Management Group LLP and 5 others4.6 million6.0%30 September 2025passive, institutional (13d-1(b))EDGAR
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
Read moreAmendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13G

Fails to deliver

Settlement dateShares failedPriceFile
5 October 2026130$162.05SEC
30 September 2026239$170.35SEC
28 September 20261$172.33SEC
24 September 2026100$163.90SEC
18 September 202689$169.68SEC
16 September 20262,433$172.45SEC
15 September 202623,400$168.93SEC
11 September 2026709$165.69SEC
4 September 202617$163.58SEC
2 September 2026756$161.40SEC
1 September 202617$164.99SEC
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.
Read moreLargest in the window: 23,400 on 15 September 2026. A fail is an operational fact about settlement, not a position.