Security record · archived quarter
ICLR
ICON Public Limited Company · Healthcare · Medical - Diagnostics & Research
112Tracked holders
-7Δ holders
49.87MShares held
$5.61BReported value
+7New positions
−15Exits
Momentum inputs (comparable managers):
holder breadth -5.9% ·
share flow -5.0% ·
net new positions -7.1%
· formula
Broad distribution: falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 2 | 0 | 2.25K | $369,812 | n/a | n/a |
| Q2 2026 | 111 | +2 | 54.20M | $9.33B | +10 | −9 |
| Q1 2026 | 112 | -7 | 49.87M | $5.61B | +7 | −15 |
| Q4 2025 | 119 | -2 | 53.17M | $9.70B | +2 | −3 |
| Q3 2025 | 18 | -1 | 14.11M | $2.47B | +2 | −4 |
| Q2 2025 | 17 | +3 | 17.03M | $2.48B | +3 | n/a |
| Q1 2025 | 11 | -1 | 10.01M | $1.75B | +1 | −2 |
| Q4 2024 | 12 | -1 | 9.48M | $1.99B | +2 | −3 |
| Q3 2024 | 12 | -1 | 9.43M | $2.71B | +1 | −2 |
| Q2 2024 | 13 | n/a | 9.47M | $2.97B | n/a | n/a |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Artisan Partners Limited Partnership | 8.28M | +20.4% | $916.15M | 1.5% | ▲ Add | 2 | SEC ↗ |
| 2 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ ×9 |
| 3 | Harris Associates (Oakmark) ✦ | 4.35M | +73.3% | $481.52M | 0.6% | ▲ Add | 4 | SEC ↗ |
| 4 | Fidelity (FMR) ✦ | 4.17M | +34.7% | $461.90M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 5 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ ×12 |
| 6 | Principal Financial Group Inc | 3.31M | +10.3% | $366.48M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 7 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ ×7 |
| 8 | Alliancebernstein L.P. | 1.34M | +5.7% | $245.01M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 9 | D. E. Shaw & Co. ✦ | 1.20M | +83.5% | $132.63M | 0.1% | ▲ Add | 8 | SEC ↗ ×2 |
| 10 | 1832 Asset Management L.P. | 1.19M | -0.9% | $132.04M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 11 | Capital World Investors ✦ | 1.10M | -26.2% | $122.26M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | Holocene Advisors, LP | 840.85K | +419.1% | $93.05M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 13 | Boston Partners | 835.14K | -33.7% | $92.42M | 0.1% | ▼ Trim | 2 | SEC ↗ ×3 |
| 14 | Dimensional Fund Advisors Lp | 788.83K | +50.8% | $87.26M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 15 | Franklin Resources Inc | 816.09K | -72.7% | $86.50M | 0.0% | ▼ Trim | 2 | SEC ↗ ×6 |
| 16 | Sei Investments Co | 757.49K | -3.6% | $83.82M | 0.1% | ▼ Trim | 2 | SEC ↗ ×2 |
| 17 | Goldman Sachs Group ✦ | 630.62K | +33.3% | $69.78M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 18 | UBS Group AG | 612.26K | +13.7% | $67.75M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 19 | Bank Of America Corp /De/ | 543.49K | -10.8% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 20 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ ×13 |
| 21 | State Street Global Advisors ✦ (passive) | 457.21K | +26.6% | $50.59M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 22 | Bamco Inc /Ny/ | 426.81K | -20.1% | $47.23M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 23 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ ×13 |
| 24 | Aberdeen Group plc | 399.29K | +504.4% | $44.19M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 25 | New York State Common Retirement… | 345.71K | +40.3% | $38.26M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 26 | Morgan Stanley ✦ | 293.14K | -38.1% | $32.44M | 0.0% | ▼ Trim | 3 | SEC ↗ ×10 |
| 27 | Raymond James Financial Inc | 261.43K | +36.8% | $28.93M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 28 | Citadel Advisors ✦ | 251.61K | +499.6% | $27.84M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 29 | CIBC Bancorp USA Inc. | 228.95K | n/a | $25.35M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 30 | Legal & General Group Plc | 175.39K | +18.7% | $19.41M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 31 | Brown Advisory Inc | 173.38K | +87.7% | $19.19M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 32 | Royal Bank Of Canada | 153.73K | +68.0% | $17.01M | 0.0% | ▲ Add | 2 | SEC ↗ ×7 |
| 33 | Manufacturers Life Insurance… | 150.79K | -37.8% | $16.69M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 34 | Envestnet Asset Management Inc | 145.26K | +26.2% | $16.07M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Balyasny Asset Management L.P. | 136.42K | +80.6% | $15.10M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 36 | California Public Employees… | 120.30K | -22.9% | $13.31M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 37 | Corient Private Wealth LP | 115.29K | +17.3% | $12.76M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 38 | Aviva Plc | 106.51K | -2.4% | $11.79M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 39 | Canada Pension Plan Investment Board | 102.74K | -41.9% | $11.37M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 40 | Ameriprise Financial Inc | 102.24K | -44.5% | $11.31M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 41 | Bank Of Montreal /Can/ | 96.40K | +55.8% | $10.67M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 42 | Geode Capital Management ✦ (passive) | 95.88K | +4.6% | $10.61M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 43 | Charles Schwab Investment… | 87.38K | +60.4% | $9.67M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 44 | Allspring Global Investments… | 82.14K | -92.4% | $9.15M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 45 | Janus Henderson Group Plc | 82.06K | -67.0% | $9.08M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 46 | Wells Fargo & Company/Mn | 73.36K | -29.8% | $8.12M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 47 | Tudor Investment Corp Et Al | 65.38K | New | $7.23M | 0.0% | New | 1 | SEC ↗ |
| 48 | Vanguard Capital Management Llc | 58.64K | n/a | $6.49M | 0.0% | n/c | 1 | SEC ↗ |
| 49 | BNP Paribas Asset Management… | 51.55K | 0.0% | $5.70M | 0.0% | Held | 2 | SEC ↗ ×2 |
| 50 | Millennium Management ✦ | 50.77K | New | $5.62M | 0.0% | New | 1 | SEC ↗ |
| 51 | Barclays Plc | 44.81K | +503.4% | $4.96M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 52 | Nomura Asset Management… | 41.89K | -84.5% | $4.64M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 53 | Hotchkis & Wiley Capital Management… | 38.89K | +247.2% | $4.30M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Tidal Investments LLC | 38.30K | +1241.9% | $4.04M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 55 | Amundi | 33.58K | +88.6% | $3.72M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 56 | Captrust Financial Advisors | 33.02K | +19.9% | $3.65M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 57 | Swedbank AB | 32.15K | -16.9% | $3.56M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 58 | Bank of New York Mellon Corp | 31.85K | -12.2% | $3.52M | 0.0% | ▼ Trim | 2 | SEC ↗ ×8 |
| 59 | JPMorgan Chase ✦ | 32.99K | -95.7% | $3.47M | 0.0% | ▼ Trim | 3 | SEC ↗ ×7 |
| 60 | Two Sigma Investments ✦ | 28.93K | +0.1% | $3.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 61 | Deutsche Bank Ag\ | 24.34K | -2.7% | $2.69M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 62 | Lazard Asset Management Llc | 23.07K | -93.8% | $2.55M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 63 | Stifel Financial Corp | 21.60K | -21.9% | $2.39M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 64 | Citigroup Inc | 20.66K | +66.1% | $2.29M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 65 | LPL Financial LLC | 19.99K | -19.0% | $2.21M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 66 | Bank Julius Baer & Co. Ltd, Zurich | 18.38K | -0.7% | $2.03M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 67 | Bnp Paribas Financial Markets | 18.23K | -63.2% | $2.02M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | UBS AM, a distinct business unit of… | 16.56K | +29.9% | $1.83M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 69 | Cetera Investment Advisers | 14.86K | +17.6% | $1.64M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Marshall Wace ✦ | 14.37K | New | $1.59M | 0.0% | New | 1 | SEC ↗ |
| 71 | Td Asset Management Inc | 13.47K | +13.3% | $1.49M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Healthcare Of Ontario Pension Plan… | 13.11K | New | $1.45M | 0.0% | New | 1 | SEC ↗ |
| 73 | Northern Trust Corp | 12.45K | -42.6% | $1.38M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 74 | Truist Financial Corp | 12.34K | -49.8% | $1.36M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 75 | Daiwa Securities Group Inc. | 12.16K | -65.2% | $1.35M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 76 | Mackenzie Financial Corp | 11.93K | +224.8% | $1.32M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 77 | First Manhattan Co. Llc. | 10.05K | New | $1.11M | 0.0% | New | 1 | SEC ↗ |
| 78 | Point72 Asset Management ✦ | 9.86K | -94.9% | $1.09M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 79 | Us Bancorp \De\ | 8.95K | -22.2% | $990,739 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 80 | Assetmark, Inc | 8.84K | +80.4% | $977,690 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Blair William & Co/Il | 8.80K | -40.3% | $973,476 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 82 | Loomis Sayles & Co L P | 8.66K | -87.2% | $958,821 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 83 | Susquehanna International Group, Llp | 8.03K | New | $888,710 | 0.0% | New | 1 | SEC ↗ |
| 84 | Focus Partners Wealth | 4.70K | -81.8% | $519,659 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 85 | HighTower Advisors, LLC | 4.28K | -18.9% | $473,226 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 86 | Neuberger Berman Group LLC | 3.90K | -97.6% | $431,953 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 87 | Northwestern Mutual Wealth… | 3.90K | -0.9% | $431,906 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 88 | Cerity Partners LLC | 3.70K | +31.4% | $409,389 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 89 | Rhumbline Advisers | 3.55K | -19.9% | $393,282 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 90 | Creative Planning | 3.50K | -20.1% | $387,121 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 91 | Rockefeller Capital Management L.P. | 3.47K | +48.4% | $384,256 | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 92 | Commonwealth Equity Services, Llc | 3.20K | -37.3% | $354,111 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 93 | Mariner, LLC | 3.18K | -18.1% | $351,100 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 94 | First Trust Advisors Lp | 2.76K | +17.0% | $305,421 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 95 | National Bank Of Canada /Fi/ | 2.59K | -74.8% | $294,676 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 96 | Jane Street Group, Llc | 2.45K | -18.6% | $271,117 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 97 | Wealth Enhancement Advisory… | 2.23K | +26.1% | $255,024 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 98 | CIBC Asset Management Inc | 2.30K | +32.2% | $254,407 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 99 | Osaic Holdings, Inc. | 2.29K | -39.1% | $253,761 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 100 | Fayez Sarofim & Co | 2.27K | -91.8% | $251,198 | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Tudor Investment Corp Et Al | $7.23M | 0.0% |
| Millennium Management | $5.62M | 0.0% |
| Marshall Wace | $1.59M | 0.0% |
| Healthcare Of Ontario Pension… | $1.45M | 0.0% |
| First Manhattan Co. Llc. | $1.11M | 0.0% |
| Susquehanna International… | $888,710 | 0.0% |
Exited
| Ninety One UK Ltd | $536.79M | was 1.2% |
| American Century Companies Inc | $189.15M | was 0.1% |
| Norges Bank | $160.07M | was 0.0% |
| Jennison Associates Llc | $123.54M | was 0.1% |
| Clearbridge Investments, LLC | $112.43M | was 0.1% |
| Voya Investment Management Llc | $79.87M | was 0.1% |
| Qube Research & Technologies… | $52.69M | was 0.1% |
| Walleye Trading LLC | $4.99M | was 0.1% |
| Wcm Investment Management, Llc | $4.42M | was 0.0% |
| Hsbc Holdings Plc | $4.02M | was 0.0% |
| FIL Ltd | $651,619 | was 0.0% |
| Sumitomo Mitsui Trust Group… | $600,962 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 414 holders, 78.10M shares, $8.66B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 17
McCague Eugene Pacelli
Director · 3.25K sh · $569,625
Sep 17
Murphy Ronan Martin
Director · 5.00K sh · $875,875
Sep 16
CLIMAX JOHN DR
Director · 5.00K sh · $875,875
Aug 11
Clerkin Nigel Bernard John
Officer · 259 sh · $42,416
Aug 11
Clerkin Nigel Bernard John
Officer · 1.59K sh · $261,672
Aug 11
Clerkin Nigel Bernard John
Officer · 180 sh · $29,792
Aug 11
Grais Linda
Director · 87 sh · $14,157
Aug 11
Grais Linda
Director · 97 sh · $15,886
Aug 11
Grais Linda
Director · 590 sh · $97,037
Aug 11
Grais Linda
Director · 67 sh · $11,089
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 13
SC 13G/A: Invesco Ltd.
Aug 06
SC 13G/A: FMR LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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