Regeneron
Develops antibody and genetic medicines led by Dupixent, EYLEA HD, and Libtayo.
$793.21
After-hours close−0.89 (−0.11%)
At close$794.10(−1.69%)
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Breakdown13F · Form 4
Institutions 184.22%Insiders 0.72%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 103.02M · Float 100.94M · 98.0% free float
Institutions13F, as of Jun 30, 2026
1,389 holders · 189.79M shares · 125 new positions · 609 increased · 539 reduced · 192 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 9.11M | 8.85% | +165.8K | Aug 7, 2026 |
| Vanguard Capital Management LLC | 6.63M | 6.44% | −25.2K | Aug 13, 2026 |
| Dodge & Cox | 4.87M | 4.73% | +412.9K | Aug 13, 2026 |
| State Street Corp | 4.83M | 4.69% | +170.2K | Aug 7, 2026 |
| Invesco Ltd. | 3.94M | 3.83% | +1.76M | Aug 14, 2026 |
| JPMorgan Chase & Co | 3.77M | 3.66% | −537.6K | Aug 12, 2026 |
| Vanguard Portfolio Management LLC | 3.18M | 3.08% | +1.45M | Aug 13, 2026 |
| Franklin Resources Inc | 2.77M | 2.69% | +49.8K | Aug 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Vanguard Capital Management | 7.37% | 7.66M | 13G | Apr 30, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| George Yancopoulos | director, officer: Bd. Co-Chair, President & CSO | 310.5K | 0.30% | Jan 5, 2026 |
| Leonard S. Schleifer | director, officer: Bd. Co-Chair, President & CEO | 214.5K | 0.21% | Jan 5, 2026 |
| Andrew J. Murphy | officer: EVP Research | 47.8K | 0.05% | Dec 11, 2025 |
| Joseph J. Larosa | officer: EVP General Counsel and Secret | 36.4K | 0.04% | Aug 21, 2026 |
| George L. Sing | director | 31.0K | 0.03% | Jan 6, 2026 |
| Daniel P. van Plew | officer: EVP & General Mgr, Industrial | 21.7K | 0.02% | Dec 11, 2025 |
| Christopher R. Fenimore | officer: EVP Finance CFO | 20.0K | 0.02% | Aug 20, 2026 |
| Arthur F. Ryan | director | 17.3K | 0.02% | Jul 7, 2026 |
| Marion McCourt | officer: EVP Commercial | 14.3K | 0.01% | Dec 11, 2025 |
| Joseph L. Goldstein | director | 6.7K | 0.01% | Jan 6, 2026 |
1 ten-percent owner holds 279.8K shares by Form 4, outside the officers-and-directors figure above · 16 people have not refiled in the last 18 months (371.0K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 10, 2026 | Kathryn Guarinidirector | Sale | 400 | $800.00 | 603 |
| Aug 10, 2026 | Huda Y. Zoghbidirector | Sale | 800 | $800.00 | 1,703 |
| Jul 2, 2026 | Arthur F. Ryandirector | Sale | 200 | $650.15 | 17,303 |
| May 1, 2026 | Arthur F. Ryandirector | Sale · 12 lots | 100 | $705.24 | 17,503 |
| Apr 1, 2026 | Arthur F. Ryandirector | Sale · 9 lots | 100 | $777.27 | 17,603 |
| Mar 2, 2026 | Arthur F. Ryandirector | Sale · 13 lots | 100 | $785.50 | 17,703 |
| Feb 19, 2026 | Huda Y. Zoghbidirector | Sale · 11 lots | 1,638 | $781.33 | 1,703 |
| Feb 9, 2026 | Arthur F. Ryandirector | Sale · 13 lots | 100 | $778.53 | 17,803 |
| Feb 9, 2026 | Jason Pitofskyofficer: SVP Controller | Sale · 11 lots | 2,036 | $778.52 | 4,272 |
| Jan 7, 2026 | Bonnie L. Basslerdirector | Sale | 1,500 | $800.00 | 1,703 |
CongressHouse and Senate disclosures
| Member | Type | Amount | Owner | Traded | Disclosed |
|---|---|---|---|---|---|
| Rep. Ro Khanna · CA17 | Purchase | $1,001 – $15,000 | Jul 7, 2026 | Aug 12, 2026 ↗ | |
| Sen. Alan Armstrong | Purchase | $1,001 – $15,000 | Joint | Mar 27, 2026 | Jul 21, 2026 ↗ |
| Rep. Gilbert Cisneros · CA31 | Sale | $1,001 – $15,000 | May 15, 2026 | Jun 9, 2026 ↗ | |
| Rep. Ro Khanna · CA17 | Purchase | $1,001 – $15,000 | Spouse | Apr 13, 2026 | May 13, 2026 ↗ |