Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in REGN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 8.9M | $6.91B | +2.4% | 8.612% | 0.12% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 6.7M | $5.14B | — | 6.405% | 0.13% |
| 3 | STATE STREET CORP | 4.7M | $3.60B | +0.1% | 4.489% | 0.12% |
Filings activity in REGN during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,361 | +1.2% | 98.76% | 6.04 pp | $62.82B | 5.8% |
| Q4 2025 | 1,345 | +12% | 104.80% | +29.23 pp | $66.66B | +39% |
| Q3 2025 | 1,200 | +2.4% | 75.57% | +1.39 pp | $48.07B | +1.9% |
| Q2 2025 | 1,172 | 5.9% | 74.18% | 12.30 pp | $47.18B | 14% |
| Q1 2025 | 1,246 | 1.3% | 86.48% | 13.41 pp | $55.01B | 13% |
| Q4 2024 | 1,262 |
Quick answers to the most common questions about buying REGN stock.
Based on Q1 2026 13F filings, institutional ownership of Regeneron Pharmaceuticals, Inc. stands at 98.8%, held across 1,361 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of REGN, with approximately 8,947,735 shares worth $6.91B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of REGN, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for REGN is 46 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
| 4 | DODGE & COX | 4.5M | $3.44B | -3.0% | 4.291% | 1.89% |
| 5 | FRANKLIN RESOURCES INC | 2.7M | $2.10B | +6.3% | 2.620% | 0.52% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 2.6M | $2.01B | +3.5% | 2.510% | 0.12% |
| 7 | Nuveen, LLC | 2.1M | $1.60B | +2.7% | 1.988% | 0.43% |
| 8 | LOOMIS SAYLES & CO L P | 1.9M | $1.48B | -1.1% | 1.841% | 1.99% |
| 9 | WELLINGTON MANAGEMENT GROUP LLP | 1.8M | $1.42B | +176.5% | 1.768% | 0.27% |
| 10 | Invesco Ltd. | 1.7M | $1.33B | +8.4% | 1.660% | 0.20% |
| 11 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.7M | $1.33B | — | 1.656% | 0.07% |
| 12 | FMR LLC | 1.5M | $1.17B | -34.5% | 1.461% | 0.06% |
| 13 | GOLDMAN SACHS GROUP INC | 1.5M | $1.16B | +13.4% | 1.448% | 0.13% |
| 14 | Capital World Investors | 1.4M | $1.10B | +1.5% | 1.366% | 0.15% |
| 15 | MORGAN STANLEY | 1.3M | $1.02B | -5.0% | 1.270% | 0.06% |
| 16 | AQR CAPITAL MANAGEMENT LLC | 1.2M | $946.0M | +23.6% | 1.185% | 0.43% |
| 17 | BANK OF AMERICA CORP /DE/ | 1.2M | $919.1M | +2.8% | 1.145% | 0.07% |
| 18 | Amundi | 1.0M | $780.2M | +27.5% | 0.972% | 0.21% |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 974K | $752.6M | -27.4% | 0.938% | 0.08% |
| 20 | NORTHERN TRUST CORP | 942K | $727.8M | -0.3% | 0.907% | 0.10% |
| 21 | TWO SIGMA INVESTMENTS, LP | 812K | $627.6M | +188.9% | 0.782% | 0.51% |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 805K | $621.6M | +3.4% | 0.774% | 0.09% |
| 23 | Bank of New York Mellon Corp | 765K | $591.4M | +0.1% | 0.737% | 0.11% |
| 24 | Legal & General Group Plc | 732K | $565.6M | -1.5% | 0.705% | 0.13% |
| 25 | UBS ASSET MANAGEMENT AMERICAS INC | 724K | $559.1M | -2.9% | 0.696% | 0.12% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in REGN — a direct measure of their conviction.
| 99.89% |
| 57.17 pp |
| $63.53B |
| 36% |
| Q3 2024 | 1,330 | +4.6% | 157.06% | +7.17 pp | $99.90B | +4.8% |
| Q2 2024 | 1,272 | — | 149.89% | — | $95.33B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
155 institutions opened new positions in REGN during Q1 2026, while 139 fully exited. 743 added to existing positions and 446 trimmed.
REGN institutional ownership fell by 6.04 percentage points quarter-over-quarter, with a net change of +16 holders.
The top 10 institutions account for 46.2% of all reported 13F value in REGN, and the top 25 account for 66.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Regeneron Pharmaceuticals, Inc. (REGN) Institutional Ownership