ICLR
ICON Public Limited Company · Healthcare · Medical - Diagnostics & Research
Momentum inputs (comparable managers):
holder breadth +21.4% ·
share flow +30.0% ·
net new positions +17.6%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 113 | +2 | 54.24M | $9.34B | +10 | −7 |
| 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 | — |
| 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 | — | 9.47M | $2.97B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 2 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 3 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 4 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 5 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 6 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 7 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 8 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 9 | Wellington Management ✦ | 3.66M | -0.8% | $532.62M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 10 | D. E. Shaw & Co. ✦ | 2.43M | +46.5% | $354.03M | 0.4% | ▲ Add | 5 | SEC ↗ |
| 11 | D. E. Shaw & Co. ✦ | 2.43M | +46.5% | $354.03M | 0.4% | ▲ Add | 5 | SEC ↗ |
| 12 | Fidelity (FMR) ✦ | 1.96M | — | $285.73M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | Fidelity (FMR) ✦ | 1.96M | — | $285.73M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | Fidelity (FMR) ✦ | 1.96M | — | $285.73M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 1.96M | — | $285.73M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | Fidelity (FMR) ✦ | 1.96M | — | $285.73M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | Fidelity (FMR) ✦ | 1.96M | — | $285.73M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | Citadel Advisors ✦ | 1.95M | +175.9% | $283.07M | 0.2% | ▲ Add | 5 | SEC ↗ |
| 19 | Citadel Advisors ✦ | 1.95M | +175.9% | $283.07M | 0.2% | ▲ Add | 5 | SEC ↗ |
| 20 | Harris Associates (Oakmark) ✦ | 1.64M | New | $238.26M | 0.4% | New | 1 | SEC ↗ |
| 21 | T. Rowe Price ✦ | 1.19M | -30.6% | $172.74M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 22 | Norges Bank ✦ (passive) | 1.09M | +4.6% | $158.64M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 23 | Millennium Management ✦ | 617.90K | +435.3% | $89.87M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 24 | Point72 Asset Management ✦ | 535.79K | +840.9% | $77.93M | 0.2% | ▲ Add | 5 | SEC ↗ |
| 25 | State Street Global Advisors ✦ (passive) | 417.59K | +17.4% | $60.74M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 26 | Baupost Group ✦ | 405.00K | 0.0% | $58.91M | 1.4% | Held | 2 | SEC ↗ |
| 27 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 29 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 31 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 32 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 34 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 35 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 37 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 38 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 39 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 40 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 41 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 42 | BlackRock ✦ (passive) | 326.55K | — | $47.50M | 0.0% | n/c | 1 | SEC ↗ |
| 43 | Renaissance Technologies ✦ | 324.82K | +81.5% | $47.25M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 44 | The Vanguard Group ✦ (passive) | 225.02K | — | $32.73M | 0.0% | n/c | 1 | SEC ↗ |
| 45 | The Vanguard Group ✦ (passive) | 225.02K | — | $32.73M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | The Vanguard Group ✦ (passive) | 225.02K | — | $32.73M | 0.0% | n/c | 1 | SEC ↗ |
| 47 | The Vanguard Group ✦ (passive) | 225.02K | — | $32.73M | 0.0% | n/c | 1 | SEC ↗ |
| 48 | Two Sigma Investments ✦ | 132.62K | New | $19.29M | 0.0% | New | 1 | SEC ↗ |
| 49 | Geode Capital Management ✦ (passive) | 84.37K | +2.6% | $12.27M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 50 | Adage Capital Partners ✦ | 36.23K | New | $5.27M | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Harris Associates (Oakmark) | $238.26M | 0.4% |
| Two Sigma Investments | $19.29M | 0.0% |
| Adage Capital Partners | $5.27M | 0.0% |
Exited
| No tracked exits this quarter. |
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.
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)
Director · 105 sh · $17,196
Director · 67 sh · $11,089
Director · 280 sh · $45,562
Director · 305 sh · $49,950
Director · 1.88K sh · $309,204
Director · 212 sh · $35,088
Director · 95 sh · $15,458
Director · 642 sh · $105,590
Director · 73 sh · $12,082
Director · 88 sh · $14,319
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology