Regeneron Pharmaceuticals, Inc. (REGN) Ownership
REGN ownership summary
as of October 18, 2026- Institutions
- 93.4% of shares outstanding
- Insiders
- 2.08% of shares outstanding
- Shares outstanding
- 101.1M
- Float
- 95.8M shares available to trade
- Short interest
- 2.21% 2.2M shares short
- Days to cover
- 2.91 short interest down 14.9% vs prior month
- Institutions 93.40%
- Insiders 2.08%
- Other investors 4.51%
REGN top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.85% | 9.1M | $7.21B | +165,771 (+1.9%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 6.44% | 6.6M | $5.24B | −25,154 (−0.4%) | June 30, 2026 |
| 3 | Dodge & Cox | 4.73% | 4.9M | $3.85B | +412,899 (+9.3%) | June 30, 2026 |
| 4 | State Street Corp | 4.70% | 4.8M | $3.82B | +170,210 (+3.6%) | June 30, 2026 |
| 5 | Amvescap Plc. | 3.83% | 3.9M | $3.12B | +35,556 (+0.9%) | June 30, 2026 |
| 6 | JPMorgan Chase & Co | 3.67% | 3.8M | $2.98B | −537,607 (−12.5%) | June 30, 2026 |
| 7 | Vanguard Portfolio Management, LLC | 3.08% | 3.2M | $2.51B | +1.5M (+84.5%) | June 30, 2026 |
| 8 | Franklin Templeton Inc | 2.69% | 2.8M | $2.19B | +49,768 (+1.8%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 2.55% | 2.6M | $2.08B | +18,078 (+0.7%) | June 30, 2026 |
| 10 | Nuveen, LLC | 1.96% | 2.0M | $1.60B | −45,090 (−2.2%) | June 30, 2026 |
| 11 | Loomis, Sayles & Company LP | 1.81% | 1.9M | $1.47B | −53,138 (−2.8%) | June 30, 2026 |
| 12 | T. Rowe Price Associates, Inc. | 1.49% | 1.5M | $1.21B | −647,818 (−29.8%) | June 30, 2026 |
| 13 | Morgan Stanley - Brokerage Accounts | 1.36% | 1.4M | $1.11B | +78,383 (+5.9%) | June 30, 2026 |
| 14 | Bank of America Corp | 1.25% | 1.3M | $1.02B | +101,469 (+8.5%) | June 30, 2026 |
| 15 | Wellington Management Company LLP | 1.23% | 1.3M | $1.00B | −567,372 (−30.9%) | June 30, 2026 |
| 16 | NORGES BANK | 1.14% | 1.2M | $927.4M | −138,677 (−10.6%) | June 30, 2026 |
| 17 | The Goldman Sachs Group Inc | 1.13% | 1.2M | $919.8M | −137,367 (−10.6%) | June 30, 2026 |
| 18 | AQR Capital Management LLC | 1.09% | 1.1M | $890.4M | −104,928 (−8.5%) | June 30, 2026 |
| 19 | Amundi | 0.98% | 1.0M | $801.4M | +3,742 (+0.4%) | June 30, 2026 |
| 20 | Northern Trust Corp | 0.89% | 916K | $724.7M | −25,474 (−2.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 2.5M shares and 10 cut 2.3M.
REGN top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.18% | 3.3M | $2.59B | −6,444 (−0.2%) | August 31, 2026 |
| 2 | Dodge & Cox Stock I | 3.03% | 3.1M | $2.47B | +213,369 (+7.3%) | June 30, 2026 |
| 3 | Vanguard 500 Index Investor | 2.50% | 2.6M | $2.04B | −79,315 (−3.0%) | September 30, 2026 |
| 4 | Invesco QQQ Trust | 2.05% | 2.1M | $1.67B | −3,454 (−0.2%) | September 30, 2026 |
| 5 | iShares Core S&P 500 ETF | 1.27% | 1.3M | $1.03B | −2,109 (−0.2%) | September 30, 2026 |
| 6 | Fidelity 500 Index | 1.26% | 1.3M | $1.03B | +4,982 (+0.4%) | August 31, 2026 |
| 7 | State Street® SPDR® S&P 500® ETF | 1.17% | 1.2M | $949.8M | — | September 30, 2026 |
| 8 | Putnam Large Cap Value A | 1.12% | 1.2M | $910.9M | — | August 31, 2026 |
| 9 | Vanguard MStar Mid Cap Index Instl | 1.05% | 1.1M | $856.2M | −31,353 (−2.8%) | September 30, 2026 |
| 10 | Vanguard Health Care Inv | 1.00% | 1.0M | $818.0M | +359,864 (+53.3%) | June 30, 2026 |
| 11 | Vanguard MStar Value Index Investor | 0.94% | 963K | $761.6M | −21,998 (−2.2%) | September 30, 2026 |
| 12 | iShares Biotechnology ETF | 0.75% | 773K | $611.4M | −5,856 (−0.8%) | September 30, 2026 |
| 13 | CREF Total Global Stock Account R3 | 0.69% | 706K | $558.1M | −19,527 (−2.7%) | August 31, 2026 |
| 14 | State Street®HlthCrSelSectSPDR®ETF | 0.68% | 695K | $549.7M | +2,160 (+0.3%) | September 30, 2026 |
| 15 | JPMorgan Equity Premium Income ETF | 0.59% | 604K | $477.3M | +380 (+0.1%) | September 30, 2026 |
| 16 | Putnam Focused Large Cap Value ETF | 0.55% | 568K | $449.2M | +328,175 (+136.8%) | August 31, 2026 |
| 17 | CREF Growth R3 | 0.52% | 539K | $426.2M | −3,727 (−0.7%) | August 31, 2026 |
| 18 | Vanguard Institutional Index I | 0.50% | 519K | $410.1M | −15,546 (−2.9%) | September 30, 2026 |
| 19 | First Trust Rising Dividend Achiev ETF | 0.50% | 515K | $407.0M | +891 (+0.2%) | September 30, 2026 |
| 20 | American Funds New Perspective A | 0.45% | 468K | $369.8M | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
REGN insider transactions
latest 11| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-19 | Huda Y Zoghbi | Sell | $781.33 | 1,638 | $1.3M |
| 2026-02-12 | Julia Letlow | Buy | $783.65 | — | — |
| 2026-02-09 | Arthur F Ryan | Sell | $778.53 | 100 | $77,853 |
| 2026-02-09 | Jason Pitofsky | Sell | $778.52 | 2,036 | $1.6M |
| 2026-01-29 | Ro Khanna | Sell | $749.44 | — | — |
| 2026-01-23 | Ro Khanna | Buy | $753.55 | — | — |
| 2026-01-07 | Bonnie L Bassler | Sell | $800.00 | 1,500 | $1.2M |
| 2025-11-18 | Gilbert Ray Cisneros, Jr. | Buy | $725.34 | — | — |
| 2025-11-07 | Jason Pitofsky | Sell | $651.43 | 431 | $280,766 |
| 2025-11-03 | Ro Khanna | Buy | $642.25 | — | — |
| 2025-10-29 | Christine A Poon | Sell | $654.27 | 6,500 | $4.3M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
REGN shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns REGN
Institutional investors own 93.4% of Regeneron's shares and insiders 2.08%. The largest holder is BlackRock Inc with 8.85% of the shares (9.1M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 10 reduced their stake in the latest filings. Short interest is 2.21% of the float, or 2.91 days of average trading volume. The share count fell 5.9% since 2014.
Related: REGN analyst forecast, REGN key metrics, REGN dividend history. See the REGN stock overview for the latest quote and news.
REGN ownership FAQ
Who owns the most Regeneron stock?
The largest shareholders of Regeneron are BlackRock Inc (8.85%), Vanguard Capital Management, LLC (6.44%), Dodge & Cox (4.73%), State Street Corp (4.70%), Amvescap Plc. (3.83%).
What percentage of Regeneron is owned by institutions?
Institutions hold 93.4% of Regeneron's shares outstanding; insiders hold 2.08%.
Which funds own Regeneron?
The largest fund holders of Regeneron are Vanguard MStar Total Stk Mkt Idx Invest (3.18%), Dodge & Cox Stock I (3.03%), Vanguard 500 Index Investor (2.50%), Invesco QQQ Trust (2.05%), iShares Core S&P 500 ETF (1.27%).
What is Regeneron's short interest?
2.2M shares of Regeneron were sold short, 2.21% of the float; at the average daily volume it would take 2.91 days to cover.
Are insiders buying or selling Regeneron?
Of the latest 11 reported insider transactions in Regeneron (since October 29, 2025), 4 were purchases and 7 were sales.
How many shares of Regeneron are outstanding?
Regeneron has 101.1M shares outstanding, of which 95.8M are in the public float.