REGENERON PHARMACEUTICALS REGN
COM · Common Stock · CUSIP 75886F107 · ISIN US75886F1075
American pharmaceutical company
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersTarrytown, NY
- Founded1988
- Websiteregeneron.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($266.4m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $562.18. Options: 40 managers hold calls ($1.5bn notional), 38 hold puts ($1.1bn).
Trends to Q3 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 1,080 |
| Q4 2022 | 1,159 |
| Q1 2023 | 1,195 |
| Q2 2023 | 1,168 |
| Q3 2023 | 1,182 |
| Q4 2023 | 1,275 |
| Q1 2024 | 1,313 |
| Q2 2024 | 1,335 |
| Q3 2024 | 1,393 |
| Q4 2024 | 1,320 |
| Q1 2025 | 1,292 |
| Q2 2025 | 1,202 |
| Q3 2025 | 1,243 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2023 | 545 | 515 |
| Q1 2024 | 615 | 545 |
| Q2 2024 | 656 | 514 |
| Q3 2024 | 662 | 533 |
| Q4 2024 | 561 | 709 |
| Q1 2025 | 650 | 603 |
| Q2 2025 | 563 | 683 |
| Q3 2025 | 646 | 527 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2024 | $1.2bn | $1.2bn | 0.98 |
| Q1 2025 | $976.3m | $999.5m | 1.02 |
| Q2 2025 | $1.2bn | $1.1bn | 0.89 |
| Q3 2025 | $1.5bn | $1.1bn | 0.70 |
Biggest buyers
| JPMORGAN CHASE & CO | Added | +4.2m |
| Dodge & Cox | Added | +724.6k |
| AQR CAPITAL MANAGEMENT LLC | Added | +606.6k |
| Invesco Ltd. | Added | +408.6k |
| Nuveen, LLC | Added | +333.7k |
| Caisse de depot et placement du Quebec | Added | +247.8k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +230.1k |
| Man Group plc | Added | +195.7k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +186.5k |
| MORGAN STANLEY | Added | +163.3k |
Biggest sellers
| Capital International Investors | Reduced | -2.3m |
| FMR LLC | Reduced | -1.4m |
| CITADEL ADVISORS LLC | Reduced | -450.3k |
| BlackRock, Inc. | Reduced | -438.9k |
| ROYAL BANK OF CANADA | Reduced | -396.7k |
| VANGUARD GROUP INC | Reduced | -375.8k |
| Amundi | Reduced | -275.4k |
| Squarepoint Ops LLC | Reduced | -231.4k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Reduced | -205.6k |
| BARCLAYS PLC | Reduced | -157.1k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $351.0m624.2k shares |
| JANE STREET GROUP, LLC | Added | $250.6m445.7k shares |
| Centiva Capital, LP | Added | $224.9m400.0k shares |
| GOLDMAN SACHS GROUP INC | Reduced | $148.0m263.2k shares |
| CITADEL ADVISORS LLC | Reduced | $117.5m208.9k shares |
| IMC-Chicago, LLC | Added | $114.8m204.1k shares |
| PEAK6 LLC | Reduced | $47.3m84.2k shares |
| WOLVERINE TRADING, LLC | Added | $45.9m81.9k shares |
| Qube Research & Technologies Ltd | Added | $24.7m43.9k shares |
| D. E. Shaw & Co., Inc. | Added | $24.6m43.7k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $370.1m658.3k shares |
| JANE STREET GROUP, LLC | Added | $120.2m213.8k shares |
| CITADEL ADVISORS LLC | Reduced | $92.6m164.7k shares |
| IMC-Chicago, LLC | Added | $67.5m120.0k shares |
| JPMORGAN CHASE & CO | Added | $46.1m82.0k shares |
| WOLVERINE TRADING, LLC | Added | $36.5m65.1k shares |
| MILLENNIUM MANAGEMENT LLC | Added | $33.2m59.1k shares |
| PEAK6 LLC | Reduced | $29.8m53.0k shares |
| Marex Group Ltd | Unchanged | $28.1m50.0k shares |
| SIMPLEX TRADING, LLC | Added | $28.0m49.8k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 7.4% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD CAPITAL MANAGEMENT LLC)
Insider purchases and sales in Q3 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2023 | 0 | — | 7 | $19.5m | $19.5m |
| Q1 2024 | 0 | — | 12 | $59.1m | $26.9m |
| Q2 2024 | 0 | — | 7 | $189.5m | $189.5m |
| Q3 2024 | 0 | — | 9 | $40.6m | $20.6m |
| Q4 2024 | 0 | — | 2 | $2.0m | $2.0m |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
None reported in Q3 2025.
Holders, Q3 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.08% of their portfolio | 9.0m $5.1bn | Reduced -375.8k |
| BlackRock, Inc. 0.09% of their portfolio | 8.8m $5.0bn | Reduced -438.9k |
| JPMORGAN CHASE & CO 0.15% of their portfolio | 8.1m $4.6bn | Added +4.2m |
| STATE STREET CORP 0.09% of their portfolio | 4.7m $2.6bn | Reduced -140.8k |
| Dodge & Cox 1.38% of their portfolio | 4.6m $2.6bn | Added +724.6k |
| GEODE CAPITAL MANAGEMENT, LLC 0.09% of their portfolio | 2.5m $1.4bn | Added +70.8k |
| FRANKLIN RESOURCES INC 0.34% of their portfolio | 2.5m $1.4bn | Added +139.6k |
| Capital World Investors 0.15% of their portfolio | 2.0m $1.1bn | Added +32.3k |
| LOOMIS SAYLES & CO L P 1.32% of their portfolio | 2.0m $1.1bn | Added +38.4k |
| FMR LLC 0.06% of their portfolio | 1.9m $1.1bn | Reduced -1.4m |
| Invesco Ltd. 0.13% of their portfolio | 1.5m $834.7m | Added +408.6k |
| MORGAN STANLEY 0.05% of their portfolio | 1.5m $815.8m | Added +163.3k |
| Nuveen, LLC 0.17% of their portfolio | 1.2m $660.8m | Added +333.7k |
| BANK OF AMERICA CORP /DE/ 0.05% of their portfolio | 1.2m $648.8m | Reduced -66.4k |
| NORTHERN TRUST CORP 0.07% of their portfolio | 984.8k $553.7m | Added +26.2k |
| GOLDMAN SACHS GROUP INC 0.08% of their portfolio | 952.8k $535.8m | Added +156.6k |
| TWO SIGMA ADVISERS, LP 1.04% of their portfolio | 926.2k $520.8m | Reduced -12.3k |
| Capital International Investors 0.08% of their portfolio | 876.6k $492.9m | Reduced -2.3m |
| D. E. Shaw & Co., Inc. 0.39% of their portfolio | 861.6k $484.4m | Added +84.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.05% of their portfolio | 804.9k $452.6m | Added +38.5k |
| Legal & General Group Plc 0.10% of their portfolio | 770.4k $433.1m | Added +30.8k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.07% of their portfolio | 755.6k $424.8m | Added +35.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.09% of their portfolio | 744.2k $418.4m | Reduced -116.3k |
| AQR CAPITAL MANAGEMENT LLC 0.26% of their portfolio | 721.4k $405.6m | Added +606.6k |
| DEUTSCHE BANK AG\ 0.13% of their portfolio | 696.7k $391.7m | Reduced -14.2k |
| Bank of New York Mellon Corp 0.07% of their portfolio | 671.6k $377.6m | Added +15.0k |
| AMERICAN CENTURY COMPANIES INC 0.19% of their portfolio | 660.6k $371.4m | Added +23.9k |
| Amundi 0.12% of their portfolio | 621.7k $364.0m | Reduced -275.4k |
| ACADIAN ASSET MANAGEMENT LLC 0.57% of their portfolio | 584.5k $328.6m | Added +118.8k |
| Qube Research & Technologies Ltd 0.44% of their portfolio | 548.7k $308.5m | Reduced -77.2k |
| ALLIANCEBERNSTEIN L.P. 0.09% of their portfolio | 523.9k $294.6m | Reduced -63.3k |
| DIMENSIONAL FUND ADVISORS LP 0.06% of their portfolio | 499.1k $280.6m | Reduced -20.3k |
| Assenagon Asset Management S.A. 0.40% of their portfolio | 477.8k $268.7m | Added +54.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.21% of their portfolio | 477.7k $268.6m | Reduced -46.7k |
| TWO SIGMA INVESTMENTS, LP 0.41% of their portfolio | 469.9k $264.2m | Reduced -29.9k |
| Caisse de depot et placement du Quebec 0.47% of their portfolio | 462.5k $260.1m | Added +247.8k |
| Pacer Advisors, Inc. 0.64% of their portfolio | 445.3k $250.4m | Added +191 |
| NEUBERGER BERMAN GROUP LLC 0.17% of their portfolio | 415.7k $233.7m | Added +10.5k |
| MARSHALL WACE, LLP 0.24% of their portfolio | 386.9k $217.5m | Added +147.0k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.18% of their portfolio | 381.0k $214.2m | Added +1.5k |
| TD Asset Management Inc 0.17% of their portfolio | 374.3k $210.4m | Added +51.4k |
| ROYAL BANK OF CANADA 0.04% of their portfolio | 373.1k $209.8m | Reduced -396.7k |
| HSBC HOLDINGS PLC 0.12% of their portfolio | 370.0k $208.5m | Added +7.8k |
| UBS Group AG 0.04% of their portfolio | 339.5k $190.9m | Added +46.0k |
| BARCLAYS PLC 0.07% of their portfolio | 325.9k $183.3m | Reduced -157.1k |
| Pictet Asset Management Holding SA 0.18% of their portfolio | 323.4k $181.7m | Added +19.2k |
| Sumitomo Mitsui Trust Group, Inc. 0.10% of their portfolio | 307.3k $172.8m | Reduced -896 |
| Swiss National Bank 0.10% of their portfolio | 306.0k $172.1m | Reduced -17.7k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.64% of their portfolio | 287.9k $161.9m | Added +53.6k |
| AMERIPRISE FINANCIAL INC 0.04% of their portfolio | 283.1k $159.2m | Reduced -4.6k |
| BANK OF NOVA SCOTIA 0.28% of their portfolio | 278.6k $156.6m | Added +29.3k |
| National Pension Service 0.12% of their portfolio | 278.1k $156.4m | Added +7.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.20% of their portfolio | 275.2k $154.7m | Added +230.1k |
| Man Group plc 0.30% of their portfolio | 271.7k $152.8m | Added +195.7k |
| Epoch Investment Partners, Inc. 0.80% of their portfolio | 259.2k $145.7m | Added +56.1k |
| FEDERATED HERMES, INC. 0.23% of their portfolio | 236.2k $132.8m | Reduced -9.4k |
| Bridgewater Associates, LP 0.52% of their portfolio | 235.4k $132.3m | Added +146.3k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.34% of their portfolio | 234.8k $132.0m | Reduced -205.6k |
| CITADEL ADVISORS LLC 0.10% of their portfolio | 230.2k $129.4m | Reduced -450.3k |
| Russell Investments Group, Ltd. 0.15% of their portfolio | 228.8k $128.6m | Added +55.0k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.09% of their portfolio | 216.2k $121.5m | Added +7.1k |
| MCDONALD CAPITAL INVESTORS INC/CA 7.46% of their portfolio | 213.3k $119.9m | Reduced -4.7k |
| DekaBank Deutsche Girozentrale 0.20% of their portfolio | 211.2k $117.7m | Unchanged |
| Swedbank AB 0.12% of their portfolio | 207.4k $116.6m | Reduced -20.9k |
| Chevy Chase Trust Holdings, LLC 0.31% of their portfolio | 203.2k $114.2m | Reduced -3.6k |
| California Public Employees Retirement System 0.07% of their portfolio | 203.1k $114.2m | Reduced -111.6k |
| Point72 Asset Management, L.P. 0.25% of their portfolio | 201.5k $113.3m | Added +58.4k |
| MILLENNIUM MANAGEMENT LLC 0.09% of their portfolio | 201.1k $113.1m | Reduced -137.7k |
| FIRST TRUST ADVISORS LP 0.08% of their portfolio | 198.3k $111.5m | Added +14.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.07% of their portfolio | 192.6k $108.3m | Added +186.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.16% of their portfolio | 190.2k $106.9m | Added +26.1k |
| FIL Ltd 0.08% of their portfolio | 187.5k $105.4m | Added +21.4k |
| Bronte Capital Management Pty Ltd. 10.20% of their portfolio | 180.3k $113.3m | Reduced -7.6k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.33% of their portfolio | 172.8k $97.2m | Reduced -107.0k |
| Candriam S.C.A. 0.50% of their portfolio | 169.5k $95.3m | Added +27.3k |
| RHUMBLINE ADVISERS 0.08% of their portfolio | 168.0k $94.5m | Reduced -2.7k |
| NATIONAL BANK OF CANADA /FI/ 0.10% of their portfolio | 164.4k $92.4m | Added +21.6k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.09% of their portfolio | 162.8k $91.6m | Reduced -1.3k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.06% of their portfolio | 158.8k $89.3m | Added +38.0k |
| Polar Capital Holdings Plc 0.43% of their portfolio | 158.8k $89.3m | Added +88.8k |
| Holocene Advisors, LP 0.20% of their portfolio | 151.7k $85.3m | New |
| Aberdeen Group plc 0.13% of their portfolio | 151.5k $85.2m | Reduced -52.2k |
| Zurich Insurance Group Ltd/FI 0.60% of their portfolio | 149.8k $84.2m | Added +127.2k |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ 4.15% of their portfolio | 144.6k $81.3m | Reduced -16.0k |
| RAYMOND JAMES FINANCIAL INC 0.03% of their portfolio | 138.5k $77.9m | Added +7.5k |
| CITIGROUP INC 0.05% of their portfolio | 138.2k $77.7m | Reduced -46.1k |
| ProShare Advisors LLC 0.16% of their portfolio | 135.2k $76.0m | Reduced -34.2k |
| WELLS FARGO & COMPANY/MN 0.02% of their portfolio | 134.2k $75.5m | Added +168 |
| MACKENZIE FINANCIAL CORP 0.09% of their portfolio | 128.6k $72.3m | Added +27.2k |
| Retirement Systems of Alabama 0.24% of their portfolio | 128.6k $72.3m | Reduced -554 |
| VOYA INVESTMENT MANAGEMENT LLC 0.07% of their portfolio | 127.5k $71.7m | Reduced -45.3k |
| ARMISTICE CAPITAL, LLC 2.21% of their portfolio | 125.2k $70.4m | Added +25.2k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.11% of their portfolio | 123.0k $69.2m | Added +27.4k |
| Robeco Institutional Asset Management B.V. 0.10% of their portfolio | 120.9k $68.0m | Added +73.2k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.09% of their portfolio | 120.6k $67.8m | Reduced -7.5k |
| NATIXIS ADVISORS, LLC 0.10% of their portfolio | 120.1k $67.5m | Added +7.1k |
| PRINCIPAL FINANCIAL GROUP INC 0.03% of their portfolio | 118.5k $66.6m | Reduced -4.8k |
| Sound Shore Management Inc /CT/ 2.14% of their portfolio | 115.0k $64.7m | New |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.12% of their portfolio | 114.9k $64.6m | Reduced -31.4k |
| ING GROEP NV 0.33% of their portfolio | 108.9k $61.2m | Added +62.7k |