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Disclosery

ICLR ICON PUB LTD CO

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Stock (common), issuer CIK 1060955

407 managers (418 13F filers) reported a position in ICLR shares at 2026-03-31, 78,099,260 shares in all. 59 filers opened a position and 149 filers sold out during the quarter.

Managers
407
13F filers
418
New
59
Added
156
Reduced
139
Sold out
149
Shares held by filers
78,099,260

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Artisan Partners Limited Partnership8,278,945$916M1.49%+1,404,96813F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…5,913,037$654M0.12%+1,562,28713F-HRTimelineGroup
HARRIS ASSOCIATES L P4,351,317$482M0.64%+1,841,15113F-HRTimeline
FMR LLCin group FMR LLC4,174,006$462M0.02%+1,076,11113F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.3,878,869$429M0.04%+121,97313F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC3,311,771$366M0.2%+310,23613F-HRTimelineGroup
Brave Warrior Advisors, LLC2,996,811$332M8.21%new13F-HRTimeline
MASSACHUSETTS FINANCIAL SERVICES CO /MA/in group MASSACHUSETTS FINANCIAL SERVI…2,727,824$305M0.1%+370,79113F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.1,344,595$245M0.08%+72,13313F-HRTimeline
Sachem Head Capital Management LPin group Sachem Head Capital Managemen…2,105,000$233M5.61%new13F-HRTimelineGroup
GREENHAVEN ASSOCIATES INC2,002,411$222M3.65%+1,985,01713F-HRTimeline
Ruane, Cunniff & Goldfarb L.P.1,634,611$181M3%-44,97913F-HRTimeline
BRANDES INVESTMENT PARTNERS, LPin group BRANDES INVESTMENT PARTNERS, …1,435,053$159M1.12%+658,32113F-HRTimelineGroup
Madison Avenue Partners, LP1,282,838$142M6.17%new13F-HRTimeline
Trinity Street Asset Management LLP1,208,148$134M9.17%+135,72013F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,198,555$133M0.1%+545,23613F-HRTimelineGroup
1832 Asset Management L.P.1,193,240$132M0.17%-11,08713F-HRTimeline
Capital World Investors1,104,831$122M0.02%-391,64813F-HRTimeline
EQUITY INVESTMENT CORP1,096,395$121M2.38%+473,20713F-HRTimeline
First Pacific Advisors, LP991,075$110M1.54%+10,27113F-HRTimeline
LYRICAL ASSET MANAGEMENT LP938,204$104M1.58%-29,75713F-HRTimeline
VAN LANSCHOT KEMPEN INVESTMENT MANAGEME…918,713$102M0.89%+175,16513F-HRTimeline
EARNEST PARTNERS LLC885,790$98M0.4%-4,28613F-HRTimeline
Holocene Advisors, LP840,845$93M0.23%+678,86213F-HRTimeline
Boston Partnersin group Boston Trust Walden Corp835,139$92.4M0.1%-423,76413F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP788,828$87.3M0.02%+265,85813F-HRTimelineGroup
Franklin Resourcesgroup of 2 filers holding816,085$86.5M-2,794,242Timeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO757,489$83.8M0.08%-28,44813F-HRTimelineGroup
LAKEWOOD CAPITAL MANAGEMENT, LPin group LAKEWOOD CAPITAL MANAGEMENT, …747,700$82.7M5.31%+415,20013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC630,621$69.8M0.01%+157,44613F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding628,829$69.6M+77,446Timeline
Sound Shore Management Inc /CT/626,958$69.4M2.32%new13F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…622,366$68.9M0.13%+338,86413F-HRTimelineGroup
Stephens Investment Management Group LLCgroup of 2 filers holding609,723$67.5M+61,505Timeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/543,487$60.1M<0.01%-66,17813F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…514,306$56.9M0.06%+233,37113F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP457,209$50.6M<0.01%+96,00313F-HRTimelineGroup
Impactive Capital LPin group Impactive Capital LP450,540$49.9M3.62%new13F-HRTimelineGroup
BAMCO INC /NY/in group Baron Capital426,805$47.2M0.14%-107,44313F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.413,596$45.8M<0.01%+35,75313F-HRTimelineGroup
Aberdeen Group plcin group Aberdeen Group plc399,290$44.2M0.07%+333,22713F-HRTimelineGroup
River Road Asset Management, LLC369,715$40.9M0.46%-105,69813F-HRTimeline
Eagle Health Investments LP358,500$39.7M8.33%+111,41013F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND345,711$38.3M0.05%+99,34513F-HRTimeline
Maple Rock Capital Partners Inc.335,300$37.1M1.21%new13F-HRTimeline
HUDSON EDGE INVESTMENT PARTNERS INC.319,003$35.3M5.16%+58,55413F-HRTimeline
Sio Capital Management, LLC306,358$33.9M4.89%+179,15613F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY293,142$32.4M<0.01%-180,49713F-HRTimelineGroup
Zuckerman Investment Group, LLC280,992$31.1M2.92%+125,34913F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC261,432$28.9M0.01%+70,32513F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC251,607$27.8M0.02%+209,64213F-HRTimelineGroup
PERRY CREEK CAPITAL LP245,000$27.1M16.89%+150,00013F-HRTimeline
CIBC Bancorp USA Inc.in group CIBC Bancorp USA Inc.228,953$25.4M0.03%13F-HRTimelineGroup
Diamond Hill Capital Management, LLC (I…220,337$24.4M0.15%-18,80513F-HRTimeline
Walleye Capital LLCgroup of 2 filers holding196,571$21.8M+34,907Timeline
Soleus Capital Management, L.P.192,000$21.2M0.86%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc175,394$19.4M<0.01%+27,67913F-HRTimelineGroup
Fisher Funds Management LTD174,291$19.3M0.57%-338,81113F-HRTimeline
BROWN ADVISORY INCin group BROWN ADVISORY INC173,379$19.2M0.03%+81,02313F-HRTimelineGroup
BROWN CAPITAL MANAGEMENT LLC158,018$17.5M2.48%+33,38013F-HRTimeline
Distillate Capital Partners LLC153,865$17M0.9%+87,72513F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA153,728$17M<0.01%+62,22513F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …150,794$16.7M0.01%-91,71013F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP147,208$16.3M0.59%+90,01813F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC145,263$16.1M<0.01%+30,11813F-HRTimelineGroup
Hyperion Capital Advisors LP142,455$15.8M7.59%+76,43413F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management136,416$15.1M0.03%+60,88813F-HRTimelineGroup
Eldred Rock Partners, LLC134,469$14.9M3.79%+81,39813F-HRTimeline
California Public Employees Retirement …120,297$13.3M0.01%-35,75513F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP115,291$12.8M0.02%+66,15413F-HRTimelineGroup
Philosophy Capital Management LLC111,015$12.3M1.43%-33,04013F-HRTimeline
Zurich Insurance Group Ltd/FIin group Zurich Insurance Group Ltd/FI109,926$12.2M0.1%new13F-HRTimelineGroup
Vident Advisory, LLCin group Vident Advisory, LLC109,046$12.1M0.1%+67,98713F-HRTimelineGroup
Running Oak Capital LLC108,647$12M1.62%+17,17513F-HRTimeline
FRONTIER CAPITAL MANAGEMENT CO LLC108,467$12M0.12%+35,72313F-HRTimeline
AVIVA PLCin group AVIVA PLC106,512$11.8M0.02%-2,56213F-HRTimelineGroup
KINGDON CAPITAL MANAGEMENT, L.L.C.105,300$11.7M1.95%+54,70013F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD102,743$11.4M0.01%-73,99813F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC102,237$11.3M<0.01%-81,86313F-HR/ATimelineGroup
Polar Capital Holdings Plcin group Polar Capital Holdings Plc100,460$11.1M0.05%new13F-HRTimelineGroup
Steamboat Capital Partners, LLC100,299$11.1M2.76%new13F-HRTimeline
Stanley Capital Management, LLC100,000$11.1M1.85%new13F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/96,404$10.7M<0.01%+34,53913F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC95,880$10.6M<0.01%+4,20713F-HRTimelineGroup
VANGUARD GROUP INCgroup of 5 filers holding95,620$10.6M+93,421Timeline
Meridiem Capital Partners LP93,878$10.4M0.68%new13F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co87,381$9.67M<0.01%+32,91713F-HRTimelineGroup
CAMBIAR INVESTORS LLC87,045$9.63M0.45%+12,22313F-HRTimeline
STATE OF MICHIGAN RETIREMENT SYSTEM85,070$9.41M0.05%013F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…83,021$9.19M0.25%+2,44613F-HRTimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …82,135$9.15M0.02%-998,05713F-HRTimelineGroup
Capital International Investorsgroup of 3 filers holding82,527$9.13M-14,810Timeline
JANUS HENDERSON GROUP PLCin group Janus Henderson82,061$9.08M<0.01%-166,21813F-HR/ATimelineGroup
Leith Wheeler Investment Counsel Ltd.81,408$9.01M0.74%new13F-HRTimeline
Foresight Group Ltd Liability Partnersh…80,660$8.93M1.58%-23313F-HRTimeline
PARTHENON LLC79,203$8.76M1%013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN73,359$8.12M<0.01%-31,20413F-HR/ATimelineGroup
Eversept Partners, LP68,688$7.6M0.5%-27,14413F-HRTimeline
MUHLENKAMP & CO INC66,005$7.3M1.92%-7,86013F-HRTimeline
TUDOR INVESTMENT CORP ET AL65,375$7.23M0.04%new13F-HRTimeline
Motley Fool Asset Management LLCgroup of 2 filers holding63,257$7M-46,052Timeline
Trexquant Investment LP62,628$6.93M0.05%new13F-HRTimeline
683 Capital Management, LLCin group 683 Capital Management, LLC62,000$6.86M0.64%new13F-HRTimelineGroup
DNB Asset Management ASin group DNB Asset Management AS60,862$6.73M0.02%+28,27313F-HRTimelineGroup
ARMISTICE CAPITAL, LLC60,268$6.67M0.22%new13F-HRTimeline
PALISADE CAPITAL MANAGEMENT, LP58,150$6.43M0.21%-38313F-HRTimeline
GATEWAY INVESTMENT ADVISERS LLC57,862$6.4M0.07%+20,07613F-HRTimeline
FIRETRAIL INVESTMENTS PTY LTD57,624$6.38M2.18%+2,64813F-HRTimeline
PFM Health Sciences, LP57,500$6.36M0.67%-57,83613F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …51,551$5.7M0.01%013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC50,765$5.62M<0.01%new13F-HRTimelineGroup
Marks Group Wealth Management, Inc50,201$5.56M0.54%+4,64713F-HRTimeline
DKRT Investments Corp.50,000$5.53M1.4%new13F-HRTimeline
OSBORNE PARTNERS CAPITAL MANAGEMENT, LLC49,764$5.51M0.29%-1,11513F-HRTimeline
Schonfeld Strategic Advisors LLC49,636$5.49M0.04%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC44,810$4.96M<0.01%+37,38413F-HRTimelineGroup
NOMURA ASSET MANAGEMENT CO LTDgroup of 2 filers holding43,532$4.82M-227,107Timeline
VAN ECK ASSOCIATES CORPin group VAN ECK ASSOCIATES CORP42,718$4.73M<0.01%-7,98313F-HRTimelineGroup
Verition Fund Management LLC42,343$4.69M0.05%+30,34213F-HRTimeline
Sendero Wealth Management, LLC40,480$4.48M0.5%+19,86513F-HRTimeline
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC38,892$4.3M0.01%+27,69213F-HRTimeline
Janney Montgomery Scott LLC36,659$4.06M0.01%+12,71713F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC38,298$4.04M0.01%+35,44413F-HRTimelineGroup
Timber Creek Capital Management LLC36,120$4M0.97%+5,13513F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…36,000$3.98M0.02%-78,00013F-HRTimelineGroup
Quinn Opportunity Partners LLC35,000$3.87M0.2%new13F-HRTimeline
FIRST NATIONAL BANK OF OMAHAgroup of 2 filers holding34,306$3.8M-9,103Timeline
Amundiin group Amundi33,583$3.72M<0.01%+15,77313F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS33,021$3.65M0.01%+5,47713F-HRTimeline
Prescott Group Capital Management, L.L.…32,682$3.62M0.36%+20,42913F-HRTimeline
Swedbank ABin group Swedbank AB32,150$3.56M<0.01%-6,55013F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp31,846$3.52M<0.01%-4,41613F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO32,994$3.47M<0.01%-734,93013F-HR/ATimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd30,554$3.38M0.12%new13F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC30,146$3.34M0.19%+18,17513F-HRTimeline
Arkadios Wealth Advisors29,843$3.3M0.05%+13,93913F-HRTimeline
Circumference Group LLC29,000$3.21M7.19%+1,00013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP28,934$3.2M<0.01%+3413F-HRTimelineGroup
LONDON CO OF VIRGINIA27,939$3.09M0.02%+13,50113F-HRTimeline
Quartz Partners, LLC26,620$2.95M1.14%+8,51613F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC26,174$2.9M0.01%+4,91013F-HRTimelineGroup
SeaBridge Investment Advisors LLC25,904$2.87M0.48%+3,64113F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC24,983$2.76M0.16%+11,49513F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\24,342$2.69M<0.01%-66813F-HRTimelineGroup
Truffle Hound Capital, LLC24,000$2.66M1.63%new13F-HRTimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC23,072$2.55M<0.01%-349,37513F-HRTimelineGroup
Militia Capital Management LLCin group Militia Capital Management LLC22,800$2.52M0.57%13F-HR/ATimelineGroup
Heights Point Management, LP21,700$2.4M2.23%new13F-HRTimeline
National Philanthropic Trust21,677$2.4M0.03%-15513F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP21,599$2.39M<0.01%-6,06113F-HRTimelineGroup
BUCKHEAD CAPITAL MANAGEMENT LLC21,285$2.36M0.89%+4,63113F-HRTimeline
Live Oak Private Wealth LLC20,822$2.3M0.32%+2,00713F-HRTimeline
CITIGROUP INCin group CITIGROUP INC20,658$2.29M<0.01%+8,22013F-HRTimelineGroup
AMERICAN FINANCIAL GROUP INCin group AMERICAN FINANCIAL GROUP INC20,000$2.21M0.82%new13F-HRTimelineGroup
LPL Financial LLC19,988$2.21M<0.01%-4,67913F-HRTimeline
Quantitative Investment Management, LLC19,762$2.19M0.23%+14,65513F-HRTimeline
ROMANO BROTHERS AND COMPANY19,610$2.17M0.25%-40013F-HRTimeline
Fund 1 Investments, LLCin group Fund 1 Investments, LLC19,527$2.16M0.28%new13F-HRTimelineGroup
Skylands Capital, LLC19,300$2.14M0.28%+13,65013F-HRTimeline
Bank Julius Baer & Co. Ltd, Zurich18,376$2.03M0.01%-12013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS18,227$2.02M<0.01%-31,27413F-HRTimelineGroup
Rangeley Capital, LLC17,700$1.96M2.11%new13F-HRTimeline
HEARTLAND ADVISORS INC16,066$1.78M0.09%+8,00813F-HRTimeline
Avidity Partners Management LP16,000$1.77M0.36%-17,10013F-HR/ATimeline
KENNEDY CAPITAL MANAGEMENT LLC15,648$1.73M0.04%-2,51813F-HRTimeline
Kerrisdale Advisers, LLC15,646$1.73M0.66%new13F-HRTimeline
Cetera Investment Advisers14,859$1.64M<0.01%+2,22113F-HRTimeline
Foyston, Gordon & Payne Inc14,535$1.61M0.37%-11,81913F-HR/ATimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP14,367$1.59M<0.01%new13F-HRTimelineGroup
USS Investment Management Ltd14,015$1.55M0.01%+58713F-HRTimeline
Grandeur Peak Global Advisors, LLC13,967$1.55M0.36%+4,69413F-HRTimeline
MAVERICK CAPITAL LTD13,887$1.54M0.02%new13F-HRTimeline
TD Asset Management Inc13,468$1.49M<0.01%+1,57913F-HRTimeline
BANQUE PICTET & CIE SA13,238$1.46M0.02%-25313F-HRTimeline
&PARTNERS13,277$1.46M0.01%+4,19213F-HRTimeline
Banque de Luxembourg S.A.13,187$1.46M0.76%-3,92513F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…13,112$1.45M<0.01%new13F-HRTimeline
Entropy Technologies, LP12,816$1.42M0.07%+6,54613F-HRTimeline
Handelsbanken Fonder AB12,739$1.41M<0.01%-6,44913F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP12,450$1.38M<0.01%-9,25713F-HRTimelineGroup
THOR INVESTMENT MANAGEMENT INC /OH/ /ADV12,417$1.37M0.73%+19713F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP12,335$1.36M<0.01%-12,25213F-HRTimelineGroup
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.12,160$1.35M<0.01%-22,83413F-HRTimelineGroup
MACKENZIE FINANCIAL CORP11,928$1.32M<0.01%+8,25613F-HRTimeline
Numerai GP LLC11,196$1.24M0.12%new13F-HRTimeline
FIRST MANHATTAN CO. LLC.10,055$1.11M<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC9,885$1.09M0.06%013F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.9,863$1.09M<0.01%-184,28713F-HRTimelineGroup
Sanctuary Advisors, LLC9,050$1M0.01%+4,11813F-HRTimeline
Nicholas Hoffman & Company, LLC.8,954$991K0.02%+3,54813F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\8,953$991K<0.01%-2,55413F-HRTimelineGroup
ASSETMARK, INCin group ASSETMARK, INC8,835$978K<0.01%+3,93813F-HRTimelineGroup
BLAIR WILLIAM & CO/IL8,797$973K<0.01%-5,94913F-HRTimeline
LOOMIS SAYLES & CO L Pin group LOOMIS SAYLES & CO L P8,665$959K<0.01%-58,91213F-HRTimelineGroup
Welch & Forbes LLC8,605$952K0.01%-10,10513F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …8,575$949K0.01%-95513F-HRTimelineGroup
OSSIAM8,121$899K0.02%+3,63213F-HRTimeline
NewEdge Wealth, LLC8,038$889K0.01%+3,61913F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…8,031$889K<0.01%new13F-HRTimelineGroup
Atria Investments, Inc7,446$824K0.01%+1,19113F-HRTimeline