Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ICLR held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Artisan Partners Limited Partnership | 8.3M | $916.1M | +20.4% | 10.813% | 1.48% |
| 2 | WELLINGTON MANAGEMENT GROUP LLP | 5.9M | $654.3M | +35.9% | 7.723% | 0.12% |
| 3 | HARRIS ASSOCIATES L P | 4.4M | $481.5M | +73.4% | 5.683% | 0.64% |
| 4 | FMR LLC | 4.2M | $461.9M | +34.7% | 5.451% | 0.02% |
| 5 | Invesco Ltd. | 3.9M | $429.2M | +3.3% | 5.066% | 0.07% |
| 6 | PRINCIPAL FINANCIAL GROUP INC | 3.3M | $366.5M | +10.3% | 4.325% | 0.20% |
| 7 | Brave Warrior Advisors, LLC | 3.0M | $331.6M | β | 3.914% | 8.21% |
| 8 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2.7M | $304.9M | +15.7% | 3.563% | 0.10% |
| 9 | ALLIANCEBERNSTEIN L.P. | 1.3M | $245.0M | +5.7% | 1.756% | 0.08% |
| 10 | GREENHAVEN ASSOCIATES INC | 2.0M | $221.6M | +11412.1% | 2.615% | 3.65% |
| 11 | Ruane, Cunniff & Goldfarb L.P. | 1.6M | $180.9M | -2.7% | 2.135% | 3.00% |
| 12 | BRANDES INVESTMENT PARTNERS, LP | 1.4M | $158.8M | +84.8% | 1.874% | 1.12% |
| 13 | Madison Avenue Partners, LP | 1.3M | $142.0M | β | 1.675% | 6.17% |
| 14 | D. E. Shaw & Co., Inc. | 1.2M | $136.4M | +88.1% | 1.609% | 0.13% |
| 15 | Trinity Street Asset Management LLP | 1.2M | $133.7M | +12.7% | 1.578% | 9.17% |
| 16 | 1832 Asset Management L.P. | 1.2M | $132.0M | -0.9% | 1.558% | 0.17% |
| 17 | Capital World Investors | 1.1M | $122.3M | -26.2% | 1.443% | 0.02% |
| 18 | EQUITY INVESTMENT CORP | 1.1M | $121.3M | +75.9% | 1.432% | 2.38% |
| 19 | First Pacific Advisors, LP | 991K | $109.7M | +1.1% | 1.294% | 1.54% |
| 20 | LYRICAL ASSET MANAGEMENT LP | 938K | $103.8M | -3.1% | 1.225% | 1.58% |
| 21 | KEMPEN CAPITAL MANAGEMENT N.V. | 919K | $101.7M | +23.6% | 1.200% | 0.89% |
| 22 | EARNEST PARTNERS LLC | 886K | $98.0M | -0.5% | 1.157% | 0.40% |
| 23 | Holocene Advisors, LP | 841K | $93.0M | +419.1% | 1.098% | 0.22% |
| 24 | Boston Partners | 835K | $92.4M | -33.7% | 1.091% | 0.10% |
| 25 | DIMENSIONAL FUND ADVISORS LP | 789K | $87.3M | +50.8% | 1.030% | 0.02% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in ICLR β a direct measure of their conviction.
Filings activity in ICLR during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ICLR position in Q1 2026
Institutions that fully closed their ICLR position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 406 | 18% | 75.33% | 48.74 pp | $8.43B | 39% |
| Q4 2025 | 496 | 0.4% | 124.07% | +11.23 pp | $13.89B | +10.0% |
| Q3 2025 | 498 | +3.5% | 112.84% | +19.61 pp | $12.63B | +21% |
| Q2 2025 | 481 | 10% | 93.23% | 14.63 pp | $10.44B | 14% |
| Q1 2025 | 536 | 5.8% | 107.86% | 21.38 pp | $12.07B | 17% |
| Q4 2024 | 569 | 11% | 129.24% | 41.80 pp | $14.47B | 24% |
| Q3 2024 | 636 | 2.5% | 171.04% | 20.64 pp | $19.14B | 11% |
| Q2 2024 | 652 | β | 191.68% | β | $21.45B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ICLR stock.
Based on Q1 2026 13F filings, institutional ownership of ICON Public Limited Company stands at 75.3%, held across 406 reporting institutions.
Artisan Partners Limited Partnership is the largest reported institutional holder of ICLR, with approximately 8,278,945 shares worth $0.92B as of Q1 2026.
Yes β 1 widely-followed marquee investor appear among the top 25 institutional holders of ICLR, including GREENHAVEN ASSOCIATES INC.
Our composite Smart Money Score for ICLR is 25 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
73 institutions opened new positions in ICLR during Q1 2026, while 163 fully exited. 71 added to existing positions and 259 trimmed.
ICLR institutional ownership fell by 48.74 percentage points quarter-over-quarter, with a net change of -90 holders.
The top 10 institutions account for 52.3% of all reported 13F value in ICLR, and the top 25 account for 73.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
ICON Public Limited Company (ICLR) Institutional Ownership