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 |
|---|---|---|---|---|---|---|
| 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 | — | — |
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 ↗ |
| 3 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 4 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 5 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 6 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 7 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 8 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 9 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 10 | Wellington Management ✦ | 5.91M | +35.9% | $654.34M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 11 | Harris Associates (Oakmark) ✦ | 4.35M | +73.3% | $481.52M | 0.6% | ▲ Add | 4 | SEC ↗ |
| 12 | Fidelity (FMR) ✦ | 4.17M | +34.7% | $461.90M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 13 | Fidelity (FMR) ✦ | 4.17M | +34.7% | $461.90M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 14 | Fidelity (FMR) ✦ | 4.17M | +34.7% | $461.90M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 4.17M | +34.7% | $461.90M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 16 | Fidelity (FMR) ✦ | 4.17M | +34.7% | $461.90M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 17 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 21 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 22 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 23 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 24 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 25 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 26 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 27 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 28 | Invesco Ltd. | 3.88M | +3.2% | $429.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 29 | Principal Financial Group Inc | 3.31M | +10.3% | $366.48M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 30 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 31 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 32 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 33 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 34 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 35 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 36 | Massachusetts Financial Services Co… | 2.73M | +15.7% | $304.90M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 37 | Alliancebernstein L.P. | 1.34M | +5.7% | $245.01M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 38 | D. E. Shaw & Co. ✦ | 1.20M | +83.5% | $132.63M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 39 | D. E. Shaw & Co. ✦ | 1.20M | +83.5% | $132.63M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 40 | 1832 Asset Management L.P. | 1.19M | -0.9% | $132.04M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 41 | Capital World Investors ✦ | 1.10M | -26.2% | $122.26M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 42 | Holocene Advisors, LP | 840.85K | +419.1% | $93.05M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 43 | Boston Partners | 835.14K | -33.7% | $92.42M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 44 | Boston Partners | 835.14K | -33.7% | $92.42M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 45 | Boston Partners | 835.14K | -33.7% | $92.42M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 46 | Dimensional Fund Advisors Lp | 788.83K | +50.8% | $87.26M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Dimensional Fund Advisors Lp | 788.83K | +50.8% | $87.26M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Dimensional Fund Advisors Lp | 788.83K | +50.8% | $87.26M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 49 | Dimensional Fund Advisors Lp | 788.83K | +50.8% | $87.26M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 50 | Dimensional Fund Advisors Lp | 788.83K | +50.8% | $87.26M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | Franklin Resources Inc | 816.09K | -72.7% | $86.50M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 52 | Franklin Resources Inc | 816.09K | -72.7% | $86.50M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 53 | Franklin Resources Inc | 816.09K | -72.7% | $86.50M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 54 | Franklin Resources Inc | 816.09K | -72.7% | $86.50M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 55 | Franklin Resources Inc | 816.09K | -72.7% | $86.50M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 56 | Franklin Resources Inc | 816.09K | -72.7% | $86.50M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 57 | Sei Investments Co | 757.49K | -3.6% | $83.82M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 58 | Sei Investments Co | 757.49K | -3.6% | $83.82M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 59 | Goldman Sachs Group ✦ | 630.62K | +33.3% | $69.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 60 | Goldman Sachs Group ✦ | 630.62K | +33.3% | $69.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 61 | Goldman Sachs Group ✦ | 630.62K | +33.3% | $69.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | UBS Group AG | 612.26K | +13.7% | $67.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 63 | UBS Group AG | 612.26K | +13.7% | $67.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 64 | UBS Group AG | 612.26K | +13.7% | $67.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 65 | UBS Group AG | 612.26K | +13.7% | $67.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 66 | UBS Group AG | 612.26K | +13.7% | $67.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 67 | Bank Of America Corp /De/ | 543.49K | -10.8% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | Bank Of America Corp /De/ | 543.49K | -10.8% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 69 | Bank Of America Corp /De/ | 543.49K | -10.8% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 70 | Bank Of America Corp /De/ | 543.49K | -10.8% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 71 | Bank Of America Corp /De/ | 543.49K | -10.8% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 73 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 74 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 75 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 76 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 77 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 78 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 79 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 80 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 81 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 82 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 83 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 84 | Russell Investments Group, Ltd. | 514.31K | +83.1% | $56.91M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 85 | State Street Global Advisors ✦ (passive) | 457.21K | +26.6% | $50.59M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 86 | Bamco Inc /Ny/ | 426.81K | -20.1% | $47.23M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 87 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 88 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 89 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 90 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 91 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 92 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 93 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 94 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 95 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 96 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 97 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 98 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 99 | BlackRock ✦ (passive) | 413.60K | +9.5% | $45.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 100 | Aberdeen Group plc | 399.29K | +504.4% | $44.19M | 0.1% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
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)
Aug 11
O'Neill Julie
Director · 105 sh · $17,196
Aug 11
Murphy Ronan Martin
Director · 67 sh · $11,089
Aug 11
Murray Ciaran
Director · 280 sh · $45,562
Aug 11
Murray Ciaran
Director · 305 sh · $49,950
Aug 11
Murray Ciaran
Director · 1.88K sh · $309,204
Aug 11
Murray Ciaran
Director · 212 sh · $35,088
Aug 11
O'Neill Julie
Director · 95 sh · $15,458
Aug 11
O'Neill Julie
Director · 642 sh · $105,590
Aug 11
O'Neill Julie
Director · 73 sh · $12,082
Aug 11
Whitaker Anne Clem
Director · 88 sh · $14,319
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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