Ranked by reported Q2 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. | 9.1M | $5.68B | +1.8% | 8.846% | 0.08% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 6.6M | $4.13B | -0.4% | 6.435% | 0.09% |
| 3 | DODGE & COX | 4.9M | $3.04B | +9.3% | 4.728% | 1.59% |
| 4 | STATE STREET CORP | 4.8M | $3.01B | +3.6% | 4.693% | 0.04% |
| 5 | Invesco Ltd. | 3.9M | $2.46B | +80.7% | 3.825% | 0.19% |
| 6 | JPMORGAN CHASE & CO | 3.8M | $2.38B | -12.5% | 3.663% | 0.13% |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.2M | $1.98B | +84.5% | 3.082% | 0.09% |
| 8 | FRANKLIN RESOURCES INC | 2.8M | $1.73B | +1.8% | 2.690% | 0.37% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 2.6M | $1.63B | +0.7% | 2.549% | 0.09% |
| 10 | Nuveen, LLC | 2.0M | $1.26B | -2.2% | 1.961% | 0.30% |
| 11 | LOOMIS SAYLES & CO L P | 1.9M | $1.16B | -2.8% | 1.805% | 1.45% |
| 12 | PeakShares LLC | 2K | $975.2M | +7.9% | 0.002% | 0.73% |
| 13 | MORGAN STANLEY | 1.4M | $871.5M | +5.9% | 1.357% | 0.05% |
| 14 | GOLDMAN SACHS GROUP INC | 1.3M | $832.0M | -11.3% | 1.295% | 0.07% |
| 15 | BANK OF AMERICA CORP /DE/ | 1.3M | $805.0M | +8.5% | 1.253% | 0.05% |
| 16 | WELLINGTON MANAGEMENT GROUP LLP | 1.3M | $792.0M | -30.9% | 1.233% | 0.14% |
| 17 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.3M | $781.3M | +28.6% | 1.216% | 0.06% |
| 18 | NORGES BANK | 1.2M | $731.3M | — | 1.138% | 0.07% |
| 19 | AQR CAPITAL MANAGEMENT LLC | 1.1M | $702.2M | -8.5% | 1.093% | 0.24% |
| 20 | Amundi | 1.0M | $632.0M | +0.4% | 0.984% | 0.15% |
| 21 | NORTHERN TRUST CORP | 916K | $571.5M | -2.7% | 0.890% | 0.07% |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 846K | $527.7M | +5.2% | 0.822% | 0.07% |
| 23 | FMR LLC | 832K | $518.8M | -45.2% | 0.808% | 0.02% |
| 24 | Capital World Investors | 815K | $508.1M | -42.6% | 0.791% | 0.06% |
| 25 | Legal & General Group Plc | 760K | $473.9M | +3.8% | 0.738% | 0.10% |
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.
Filings activity in REGN during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new REGN position in Q2 2026
Institutions that fully closed their REGN position in Q2 2026
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 |
|---|---|---|---|---|---|---|
| Q2 2026 | 1,340 | 3.3% | 91.39% | +3.06 pp | $57.41B | 14% |
| Q1 2026 | 1,386 | +2.0% | 88.33% | 1.52 pp | $66.83B | 1.6% |
| Q4 2025 | 1,359 | +12% | 89.85% | +0.57 pp | $67.91B | +38% |
| Q3 2025 | 1,216 | +3.8% | 89.28% | 0.40 pp | $49.30B | +4.5% |
| Q2 2025 | 1,172 | 5.9% | 89.68% | 2.78 pp | $47.18B | 14% |
| Q1 2025 | 1,246 | 1.3% | 92.46% | +0.18 pp | $55.01B | 13% |
| Q4 2024 | 1,262 | 5.1% | 92.28% | 1.18 pp | $63.53B | 36% |
| Q3 2024 | 1,330 | — | 93.46% | — | $99.90B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying REGN stock.
Based on Q2 2026 13F filings, institutional ownership of Regeneron Pharmaceuticals, Inc. stands at 91.4%, held across 1,340 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of REGN, with approximately 9,113,506 shares worth $5.68B as of Q2 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of REGN, including SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for REGN is 48 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
109 institutions opened new positions in REGN during Q2 2026, while 167 fully exited. 198 added to existing positions and 989 trimmed.
REGN institutional ownership rose by 3.06 percentage points quarter-over-quarter, with a net change of -46 holders.
The top 10 institutions account for 47.6% of all reported 13F value in REGN, and the top 25 account for 66.5%.
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