ICLR
ICON Public Limited Company · Healthcare · Medical - Diagnostics & Research
Momentum inputs (comparable managers):
holder breadth -8.3% ·
share flow +5.5% ·
net new positions -9.1%
· formula
Concentrated accumulation: rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| 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 |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wellington Management ✦ | 3.69M | +74.8% | $646.27M | 0.1% | ▲ Add | 4 | SEC ↗ ×9 |
| 2 | T. Rowe Price ✦ | 1.71M | -41.7% | $299.27M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 3 | D. E. Shaw & Co. ✦ | 1.66M | +48.9% | $290.79M | 0.4% | ▲ Add | 4 | SEC ↗ ×2 |
| 4 | Norges Bank ✦ (passive) | 1.04M | +3.6% | $182.44M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | Citadel Advisors ✦ | 705.32K | +23.4% | $123.42M | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 6 | Baupost Group ✦ | 405.00K | New | $70.87M | 2.0% | New | 1 | SEC ↗ |
| 7 | State Street Global Advisors ✦ (passive) | 355.77K | +4.4% | $62.26M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | Renaissance Technologies ✦ | 178.92K | +42.2% | $31.31M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 9 | Millennium Management ✦ | 115.44K | -48.8% | $20.20M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 10 | Geode Capital Management ✦ (passive) | 82.21K | -2.5% | $14.39M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 11 | Point72 Asset Management ✦ | 56.95K | -93.3% | $9.97M | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Baupost Group | $70.87M | 2.0% |
Exited
| Marshall Wace | $18.61M | was 0.0% |
| Adage Capital Partners | $4.13M | 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.
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 · 3.25K sh · $569,625
Director · 5.00K sh · $875,875
Director · 5.00K sh · $875,875
Officer · 259 sh · $42,416
Officer · 1.59K sh · $261,672
Officer · 180 sh · $29,792
Director · 87 sh · $14,157
Director · 97 sh · $15,886
Director · 590 sh · $97,037
Director · 67 sh · $11,089
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology