REGN
Regeneron Pharmaceuticals, Inc. · Healthcare · Biotechnology
Momentum inputs (comparable managers):
holder breadth +5.0% ·
share flow -3.6% ·
net new positions +4.8%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 169 | -1 | 76.07M | $47.53B | +5 | −5 |
| Q1 2026 | 172 | -4 | 77.87M | $60.04B | +2 | −7 |
| Q4 2025 | 175 | 0 | 81.03M | $62.54B | +1 | — |
| Q3 2025 | 27 | -1 | 48.96M | $27.52B | — | −2 |
| Q2 2025 | 26 | +2 | 40.24M | $21.12B | +3 | −1 |
| Q1 2025 | 21 | +1 | 16.62M | $10.53B | +1 | — |
| Q4 2024 | 20 | -1 | 17.24M | $12.28B | — | −1 |
| Q3 2024 | 20 | +1 | 13.10M | $13.76B | +2 | −1 |
| Q2 2024 | 19 | — | 13.77M | $14.47B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 4.79M | -0.9% | $3.04B | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 2.47M | +1.7% | $1.56B | 0.1% | ▲ Add | 4 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 2.47M | +1.7% | $1.56B | 0.1% | ▲ Add | 4 | SEC ↗ |
| 4 | Dodge & Cox ✦ | 2.32M | +0.1% | $1.47B | 0.8% | ▲ Add | 4 | SEC ↗ |
| 5 | T. Rowe Price ✦ | 2.18M | +4.3% | $1.38B | 0.2% | ▲ Add | 4 | SEC ↗ |
| 6 | T. Rowe Price ✦ | 2.18M | +4.3% | $1.38B | 0.2% | ▲ Add | 4 | SEC ↗ |
| 7 | Capital World Investors ✦ | 1.94M | -30.2% | $1.23B | 0.2% | ▼ Trim | 4 | SEC ↗ |
| 8 | Norges Bank ✦ (passive) | 1.13M | +0.2% | $715.74M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 9 | D. E. Shaw & Co. ✦ | 578.89K | +15.7% | $367.15M | 0.5% | ▲ Add | 4 | SEC ↗ |
| 10 | D. E. Shaw & Co. ✦ | 578.89K | +15.7% | $367.15M | 0.5% | ▲ Add | 4 | SEC ↗ |
| 11 | Two Sigma Investments ✦ | 372.07K | +977.1% | $235.98M | 0.5% | ▲ Add | 3 | SEC ↗ |
| 12 | AQR Capital Management ✦ | 235.95K | +13.9% | $148.66M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 235.95K | +13.9% | $148.66M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 235.95K | +13.9% | $148.66M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 15 | AQR Capital Management ✦ | 235.95K | +13.9% | $148.66M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 235.95K | +13.9% | $148.66M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 17 | AQR Capital Management ✦ | 235.95K | +13.9% | $148.66M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 18 | Millennium Management ✦ | 169.59K | +27.0% | $107.56M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 19 | Viking Global Investors ✦ | 97.74K | New | $61.99M | 0.2% | New | 1 | SEC ↗ |
| 20 | Adage Capital Partners ✦ | 92.75K | +109.1% | $58.82M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 21 | Renaissance Technologies ✦ | 78.90K | -68.2% | $50.04M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 22 | Citadel Advisors ✦ | 74.90K | -61.1% | $47.51M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 23 | Citadel Advisors ✦ | 74.90K | -61.1% | $47.51M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 24 | Gotham Asset Management ✦ | 32.05K | +180.6% | $20.33M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 25 | Bridgewater Associates ✦ | 20.99K | +7163.3% | $13.31M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 26 | Wellington Management ✦ | 17.41K | -88.3% | $11.04M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 27 | Wellington Management ✦ | 17.41K | -88.3% | $11.04M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 28 | Wellington Management ✦ | 17.41K | -88.3% | $11.04M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 29 | Wellington Management ✦ | 17.41K | -88.3% | $11.04M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 30 | Wellington Management ✦ | 17.41K | -88.3% | $11.04M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 31 | ARK Investment Management ✦ | 13.69K | +3.8% | $8.69M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 32 | Fisher Asset Management ✦ | 4.35K | -26.1% | $2.76M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 33 | Marshall Wace ✦ | 1.40K | -98.9% | $887,922 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 34 | GAMCO Investors ✦ | 589 | +4.6% | $373,561 | 0.0% | ▲ Add | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Viking Global Investors | $61.99M | 0.2% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 2 holders, 20.80K shares, $1.33M 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 · 400 sh · $320,000
Director · 800 sh · $640,000
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology