ICON PLC (ICLR) Institutional Shareholders
ICON PLC (ICLR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $9.05B in ICLR holdings during the latest filing period.
Artisan Partners Limited Partnership is currently the largest disclosed institutional shareholder of ICLR tracked by InsiderSet, reporting ownership valued at approximately $916.15M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.31B, representing an estimated gain of +43.15% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed ICLR value among the investors covered in this analysis. Major shareholders include Artisan Partners Limited Partnership, Wellington Management Group Llp, Greenhaven Associates, and several other long-term asset managers with concentrated positions in ICON PLC (ICLR).
This page ranks the largest institutional ICLR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
397
Total Reported Value
$9.05B
Largest Holder
Artisan Partners Limited Partnership
Largest Position
$916.15M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
54
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Artisan Partners Limited Partnership | 1.49% | 8,278,945 | $916,148,054 | $1,311,467,677 | +$395,319,623 | +43.15% | |
| Wellington Management Group Llp | 0.12% | 5,913,037 | $654,336,675 | $936,684,191 | +$282,347,516 | +43.15% | |
| Greenhaven Associates | Edgar Wachenheim III | 6.22% | 3,100,615 | $538,607,832 | $491,168,422 | -$47,439,410 | -8.81% |
| Harris Associates L P | 0.64% | 4,351,317 | $481,516,739 | $689,292,126 | +$207,775,387 | +43.15% | |
| Fmr Llc | 0.02% | 4,174,006 | $461,895,449 | $661,204,290 | +$199,308,841 | +43.15% | |
| Invesco Ltd. | 0.07% | 3,878,869 | $429,235,666 | $614,451,638 | +$185,215,972 | +43.15% | |
| Massachusetts Financial Services Co | 0.12% | 2,105,171 | $369,449,772 | $333,480,138 | -$35,969,634 | -9.74% | |
| Principal Financial Group Inc | 0.20% | 3,311,771 | $366,480,578 | $524,617,644 | +$158,137,066 | +43.15% | |
| Brave Warrior Advisors | Glenn Greenberg | 8.21% | 2,996,811 | $331,627,105 | $474,724,831 | +$143,097,726 | +43.15% |
| Trinity Street Asset Management Llp | 13.74% | 1,535,462 | $266,725,104 | $243,232,535 | -$23,492,569 | -8.81% | |
| Alliancebernstein L.P. | 0.08% | 1,344,595 | $245,012,101 | $212,997,294 | -$32,014,807 | -13.07% | |
| Sequoia Fund | Ruane, Cunniff & Goldfarb | 3.00% | 1,634,611 | $180,886,053 | $258,938,729 | +$78,052,676 | +43.15% |
| Brandes Investment Partners, Lp | 1.12% | 1,435,053 | $158,804,315 | $227,326,746 | +$68,522,431 | +43.15% | |
| Madison Avenue Partners, Lp | 6.17% | 1,282,838 | $141,958,853 | $203,214,368 | +$61,255,515 | +43.15% | |
| D. E. Shaw & Co., Inc. | 0.10% | 1,198,555 | $132,632,096 | $189,863,098 | +$57,231,002 | +43.15% | |
| 1832 Asset Management L.P. | 0.17% | 1,193,240 | $132,043,938 | $189,021,148 | +$56,977,210 | +43.15% | |
| Stephens Investment Management Group Llc | 1.34% | 720,261 | $125,116,538 | $114,096,545 | -$11,019,993 | -8.81% | |
| Capital World Investors | 0.02% | 1,104,831 | $122,260,598 | $175,016,279 | +$52,755,681 | +43.15% | |
| Equity Investment Corp | 2.38% | 1,096,395 | $121,327,085 | $173,679,932 | +$52,352,847 | +43.15% | |
| First Pacific Advisors, Lp | 1.54% | 991,075 | $109,672,359 | $156,996,191 | +$47,323,832 | +43.15% | |
| Lyrical Asset Management Lp | 1.58% | 938,204 | $103,821,655 | $148,620,896 | +$44,799,241 | +43.15% | |
| Van Lanschot Kempen Investment Management N.V. | 0.89% | 918,713 | $101,664,781 | $145,533,326 | +$43,868,545 | +43.15% | |
| Earnest Partners Llc | 0.40% | 885,790 | $98,021,521 | $140,317,994 | +$42,296,473 | +43.15% | |
| Holocene Advisors, Lp | 0.23% | 840,845 | $93,047,908 | $133,198,256 | +$40,150,348 | +43.15% | |
| Boston Partners | 0.10% | 835,139 | $92,419,731 | $132,294,369 | +$39,874,638 | +43.15% | |
| Dimensional Fund Advisors Lp | 0.02% | 788,828 | $87,261,794 | $124,958,243 | +$37,696,449 | +43.20% | |
| Franklin Resources Inc | 0.02% | 816,085 | $86,495,975 | $129,276,025 | +$42,780,050 | +49.46% | |
| Sei Investments Co | 0.08% | 757,489 | $83,824,228 | $119,993,832 | +$36,169,604 | +43.15% | |
| Lakewood Capital Management, Lp | 5.31% | 747,700 | $82,740,482 | $118,443,157 | +$35,702,675 | +43.15% | |
| Goldman Sachs Group Inc | 0.01% | 630,621 | $69,784,519 | $99,896,673 | +$30,112,154 | +43.15% | |
| Sound Shore Management | Harry Burn | 2.32% | 626,958 | $69,379,172 | $99,316,417 | +$29,937,245 | +43.15% |
| Aberdeen Group Plc | 0.10% | 394,362 | $68,504,623 | $62,470,884 | -$6,033,739 | -8.81% | |
| Ubs Group Ag | 0.01% | 612,265 | $67,753,245 | $96,988,899 | +$29,235,654 | +43.15% | |
| Hudson Edge Investment Partners Inc. | 8.70% | 366,477 | $63,660,720 | $58,053,622 | -$5,607,098 | -8.81% | |
| Bank Of America Corp | 0.00% | 543,487 | $60,142,271 | $86,093,776 | +$25,951,505 | +43.15% | |
| Russell Investments Group, Ltd. | 0.06% | 514,306 | $56,913,173 | $81,471,213 | +$24,558,040 | +43.15% | |
| State Street Corp | 0.00% | 457,209 | $50,594,748 | $72,426,478 | +$21,831,730 | +43.15% | |
| Impactive Capital Lp | 3.62% | 450,540 | $49,856,756 | $71,370,041 | +$21,513,285 | +43.15% | |
| River Road Asset Management, Llc | 0.55% | 285,137 | $49,531,148 | $45,168,552 | -$4,362,596 | -8.81% | |
| Bamco Inc | 0.14% | 426,805 | $47,230,241 | $67,610,180 | +$20,379,939 | +43.15% | |
| Blackrock, Inc. | 0.00% | 413,596 | $45,768,536 | $65,517,742 | +$19,749,206 | +43.15% | |
| Eagle Health Investments Lp | 8.33% | 358,500 | $39,671,610 | $56,789,985 | +$17,118,375 | +43.15% | |
| Maple Rock Capital Partners Inc. | 1.21% | 335,300 | $37,104,298 | $53,114,873 | +$16,010,575 | +43.15% | |
| Sio Capital Management, Llc | 4.89% | 306,358 | $33,901,576 | $48,530,171 | +$14,628,595 | +43.15% | |
| Morgan Stanley | 0.00% | 293,142 | $32,439,373 | $46,436,624 | +$13,997,251 | +43.15% | |
| Zuckerman Investment Group, Llc | 2.92% | 280,992 | $31,094,575 | $44,511,943 | +$13,417,368 | +43.15% | |
| Raymond James Financial Inc | 0.01% | 261,432 | $28,930,047 | $41,413,443 | +$12,483,396 | +43.15% | |
| Citadel Advisors Llc | 0.02% | 251,607 | $27,842,831 | $39,857,065 | +$12,014,234 | +43.15% | |
| Perry Creek Capital Lp | 16.89% | 245,000 | $27,111,700 | $38,810,450 | +$11,698,750 | +43.15% | |
| Fisher Funds Management Ltd | 0.74% | 149,726 | $26,008,903 | $23,718,096 | -$2,290,807 | -8.81% |
Frequently asked questions about ICLR
Who owns the most ICLR stock?
The largest holders of ICLR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ICON PLC (ICLR).
Is ICLR widely held by superinvestors?
Many widely followed stocks like ICLR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ICLR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.