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 ($199.5m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $525.26. Options: 40 managers hold calls ($1.2bn notional), 44 hold puts ($1.1bn).
Trends to Q2 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 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 498 | 535 |
| 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 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $1.5bn | $1.9bn | 1.29 |
| Q4 2024 | $1.2bn | $1.2bn | 0.98 |
| Q1 2025 | $976.3m | $999.5m | 1.02 |
| Q2 2025 | $1.2bn | $1.1bn | 0.89 |
Biggest buyers
| Dodge & Cox | Added | +1.5m |
| CITADEL ADVISORS LLC | Added | +605.6k |
| ROYAL BANK OF CANADA | Added | +566.6k |
| TWO SIGMA ADVISERS, LP | Added | +384.7k |
| BlackRock, Inc. | Added | +350.2k |
| ACADIAN ASSET MANAGEMENT LLC | Added | +326.6k |
| LOOMIS SAYLES & CO L P | Added | +305.1k |
| Nuveen, LLC | Added | +299.5k |
| MARSHALL WACE, LLP | Added | +238.5k |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Added | +233.5k |
Biggest sellers
| FMR LLC | Reduced | -4.3m |
| JPMORGAN CHASE & CO | Reduced | -1.7m |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -1.4m |
| Capital International Investors | Reduced | -823.9k |
| Amundi | Reduced | -706.8k |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | -222.3k |
| ABN AMRO Bank N.V. | Reduced | -220.6k |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | -205.7k |
| California Public Employees Retirement System | Reduced | -158.7k |
| WORLDQUANT MILLENNIUM ADVISORS LLC | Sold out | -129.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $289.1m550.7k shares |
| CITADEL ADVISORS LLC | Added | $152.5m290.5k shares |
| GOLDMAN SACHS GROUP INC | Reduced | $141.4m269.4k shares |
| Scion Asset Management, LLC | New | $105.0m200.0k shares |
| IMC-Chicago, LLC | Added | $67.4m128.3k shares |
| PEAK6 LLC | Added | $61.0m116.2k shares |
| JANE STREET GROUP, LLC | Added | $41.0m78.0k shares |
| WOLVERINE TRADING, LLC | Added | $36.5m70.0k shares |
| MILLENNIUM MANAGEMENT LLC | Added | $34.3m65.4k shares |
| JPMORGAN CHASE & CO | Added | $30.0m57.2k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $378.2m720.3k shares |
| CITADEL ADVISORS LLC | Added | $103.8m197.8k shares |
| PEAK6 LLC | New | $85.0m162.0k shares |
| IMC-Chicago, LLC | Added | $58.6m111.7k shares |
| LMR Partners LLP | New | $51.3m97.8k shares |
| WOLVERINE TRADING, LLC | Added | $32.9m63.2k shares |
| Caption Management, LLC | New | $31.5m60.0k shares |
| Marex Group Ltd | New | $26.2m50.0k shares |
| Balyasny Asset Management L.P. | Reduced | $23.4m44.5k shares |
| Qube Research & Technologies Ltd | Reduced | $22.6m43.1k 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 Q2 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 |
|---|---|---|---|---|---|
| Q3 2023 | 0 | — | 7 | $27.6m | $2.1m |
| 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 | — | — |
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.08% of their portfolio | 9.4m $4.9bn | Added +16.2k |
| BlackRock, Inc. 0.09% of their portfolio | 9.3m $4.9bn | Added +350.2k |
| STATE STREET CORP 0.10% of their portfolio | 4.8m $2.5bn | Added +42.3k |
| JPMORGAN CHASE & CO 0.14% of their portfolio | 3.9m $2.1bn | Reduced -1.7m |
| Dodge & Cox 1.13% of their portfolio | 3.8m $2.0bn | Added +1.5m |
| FMR LLC 0.10% of their portfolio | 3.3m $1.7bn | Reduced -4.3m |
| Capital International Investors 0.29% of their portfolio | 3.2m $1.7bn | Reduced -823.9k |
| GEODE CAPITAL MANAGEMENT, LLC 0.09% of their portfolio | 2.5m $1.3bn | Reduced -4.5k |
| FRANKLIN RESOURCES INC 0.32% of their portfolio | 2.3m $1.2bn | Added +36.8k |
| Capital World Investors 0.15% of their portfolio | 2.0m $1.0bn | Added +27.4k |
| LOOMIS SAYLES & CO L P 1.28% of their portfolio | 1.9m $1.0bn | Added +305.1k |
| MORGAN STANLEY 0.04% of their portfolio | 1.3m $676.0m | Added +36.7k |
| BANK OF AMERICA CORP /DE/ 0.05% of their portfolio | 1.2m $640.7m | Added +176.1k |
| NORGES BANK 0.08% of their portfolio | 1.2m $628.2m | Added +68.0k |
| Invesco Ltd. 0.10% of their portfolio | 1.1m $564.8m | Added +225.1k |
| NORTHERN TRUST CORP 0.07% of their portfolio | 958.6k $503.2m | Reduced -43.2k |
| TWO SIGMA ADVISERS, LP 1.01% of their portfolio | 938.5k $492.7m | Added +384.7k |
| Amundi 0.17% of their portfolio | 897.1k $491.4m | Reduced -706.8k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.09% of their portfolio | 860.4k $451.7m | Reduced -79.9k |
| Nuveen, LLC 0.12% of their portfolio | 841.5k $441.8m | Added +299.5k |
| GOLDMAN SACHS GROUP INC 0.07% of their portfolio | 796.2k $418.0m | Reduced -40.9k |
| D. E. Shaw & Co., Inc. 0.41% of their portfolio | 777.5k $408.2m | Added +198.6k |
| ROYAL BANK OF CANADA 0.04% of their portfolio | 769.8k $404.1m | Added +566.6k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.05% of their portfolio | 766.4k $402.4m | Reduced -1.4m |
| Legal & General Group Plc 0.10% of their portfolio | 739.6k $388.3m | Reduced -7.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.07% of their portfolio | 720.3k $378.1m | Added +13.8k |
| DEUTSCHE BANK AG\ 0.14% of their portfolio | 710.8k $373.2m | Added +167.7k |
| CITADEL ADVISORS LLC 0.31% of their portfolio | 680.5k $357.3m | Added +605.6k |
| Bank of New York Mellon Corp 0.07% of their portfolio | 656.6k $344.7m | Reduced -41.6k |
| AMERICAN CENTURY COMPANIES INC 0.18% of their portfolio | 636.7k $334.2m | Reduced -85.8k |
| Qube Research & Technologies Ltd 0.46% of their portfolio | 626.0k $328.6m | Reduced -76.9k |
| ALLIANCEBERNSTEIN L.P. 0.10% of their portfolio | 587.2k $308.3m | Reduced -22.4k |
| BNP PARIBAS FINANCIAL MARKETS 0.21% of their portfolio | 524.4k $275.3m | Reduced -222.3k |
| DIMENSIONAL FUND ADVISORS LP 0.06% of their portfolio | 519.4k $272.7m | Reduced -51.8k |
| TWO SIGMA INVESTMENTS, LP 0.47% of their portfolio | 499.8k $262.4m | Added +127.8k |
| BARCLAYS PLC 0.10% of their portfolio | 483.0k $253.6m | Added +161.7k |
| ACADIAN ASSET MANAGEMENT LLC 0.50% of their portfolio | 465.7k $244.5m | Added +326.6k |
| Pacer Advisors, Inc. 0.59% of their portfolio | 445.1k $233.7m | Added +37.8k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.56% of their portfolio | 440.4k $231.2m | Reduced -91.8k |
| Assenagon Asset Management S.A. 0.35% of their portfolio | 423.3k $222.2m | Reduced -58.1k |
| NEUBERGER BERMAN GROUP LLC 0.16% of their portfolio | 405.2k $212.7m | Reduced -31.3k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.18% of their portfolio | 379.5k $199.3m | Reduced -18.7k |
| HSBC HOLDINGS PLC 0.12% of their portfolio | 362.1k $189.9m | Reduced -27.5k |
| MILLENNIUM MANAGEMENT LLC 0.16% of their portfolio | 338.8k $177.9m | Added +169.2k |
| Swiss National Bank 0.10% of their portfolio | 323.7k $169.9m | Added +18.9k |
| TD Asset Management Inc 0.14% of their portfolio | 322.9k $169.5m | Reduced -29.0k |
| California Public Employees Retirement System 0.11% of their portfolio | 314.7k $165.2m | Reduced -158.7k |
| Sumitomo Mitsui Trust Group, Inc. 0.10% of their portfolio | 308.2k $161.8m | Added +4.5k |
| Pictet Asset Management Holding SA 0.16% of their portfolio | 304.1k $159.3m | Added +3.2k |
| Squarepoint Ops LLC 0.34% of their portfolio | 297.7k $156.3m | Added +13.7k |
| UBS Group AG 0.03% of their portfolio | 293.5k $154.1m | Added +6.4k |
| AMERIPRISE FINANCIAL INC 0.04% of their portfolio | 287.7k $151.8m | Reduced -52.4k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.54% of their portfolio | 279.9k $146.9m | Added +51.6k |
| National Pension Service 0.12% of their portfolio | 271.1k $142.3m | Added +18.0k |
| BANK OF NOVA SCOTIA 0.27% of their portfolio | 249.3k $130.9m | Added +126.7k |
| FEDERATED HERMES, INC. 0.24% of their portfolio | 245.6k $128.9m | Added +204.0k |
| MARSHALL WACE, LLP 0.15% of their portfolio | 239.9k $126.0m | Added +238.5k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.48% of their portfolio | 234.3k $123.0m | Added +233.5k |
| Swedbank AB 0.13% of their portfolio | 228.3k $119.9m | First filing |
| MCDONALD CAPITAL INVESTORS INC/CA 7.18% of their portfolio | 218.0k $114.5m | Added +21.3k |
| Caisse de depot et placement du Quebec 0.24% of their portfolio | 214.7k $112.7m | Reduced -7.9k |
| DekaBank Deutsche Girozentrale 0.20% of their portfolio | 211.2k $110.0m | Reduced -10.0k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.09% of their portfolio | 209.1k $109.8m | Added +10.2k |
| Chevy Chase Trust Holdings, LLC 0.32% of their portfolio | 206.7k $108.5m | Reduced -14.5k |
| Aberdeen Group plc 0.18% of their portfolio | 203.8k $107.0m | Reduced -41.4k |
| Epoch Investment Partners, Inc. 0.55% of their portfolio | 203.1k $106.6m | Reduced -4.4k |
| Bronte Capital Management Pty Ltd. 8.73% of their portfolio | 187.9k $111.1m | Added +33.2k |
| CITIGROUP INC 0.07% of their portfolio | 184.2k $96.7m | Reduced -1.3k |
| FIRST TRUST ADVISORS LP 0.08% of their portfolio | 184.0k $96.6m | Added +70.1k |
| Russell Investments Group, Ltd. 0.12% of their portfolio | 173.8k $91.1m | Added +27.1k |
| VOYA INVESTMENT MANAGEMENT LLC 0.09% of their portfolio | 172.8k $90.7m | Reduced -205.7k |
| RHUMBLINE ADVISERS 0.08% of their portfolio | 170.7k $89.6m | Reduced -2.5k |
| VICTORY CAPITAL MANAGEMENT INC 0.06% of their portfolio | 170.3k $91.3m | Added +73.1k |
| ProShare Advisors LLC 0.18% of their portfolio | 169.3k $88.9m | Added +6.1k |
| Capitolis Liquid Global Markets LLC 0.65% of their portfolio | 168.0k $88.2m | Added +117.0k |
| FIL Ltd 0.07% of their portfolio | 166.1k $87.2m | Added +81.0k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.10% of their portfolio | 164.1k $86.2m | Reduced -2.0k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.13% of their portfolio | 164.1k $86.1m | Added +12.6k |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ 4.25% of their portfolio | 160.6k $84.3m | Added +45.7k |
| Balyasny Asset Management L.P. 0.18% of their portfolio | 153.4k $80.6m | Added +119.9k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.15% of their portfolio | 146.2k $76.8m | Added +85.2k |
| Point72 Asset Management, L.P. 0.18% of their portfolio | 143.1k $75.1m | New |
| NATIONAL BANK OF CANADA /FI/ 0.08% of their portfolio | 142.8k $75.0m | Added +44.8k |
| Candriam S.C.A. 0.43% of their portfolio | 142.2k $74.7m | Reduced -72.7k |
| WELLS FARGO & COMPANY/MN 0.02% of their portfolio | 134.1k $70.4m | Reduced -11.6k |
| RAYMOND JAMES FINANCIAL INC 0.02% of their portfolio | 131.1k $68.8m | Added +19.5k |
| Retirement Systems of Alabama 0.24% of their portfolio | 129.2k $67.8m | Reduced -2.2k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.09% of their portfolio | 128.1k $67.2m | Reduced -2.5k |
| ASSETMARK, INC 0.16% of their portfolio | 127.6k $67.0m | Added +24.0k |
| BANK OF MONTREAL /CAN/ 0.03% of their portfolio | 124.6k $65.4m | Added +10.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.03% of their portfolio | 123.2k $64.7m | Reduced -6.4k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.05% of their portfolio | 120.8k $63.4m | Reduced -82.8k |
| AQR CAPITAL MANAGEMENT LLC 0.05% of their portfolio | 114.7k $59.7m | Reduced -121.2k |
| NATIXIS ADVISORS, LLC 0.09% of their portfolio | 113.0k $59.3m | Reduced -3.2k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.10% of their portfolio | 106.6k $55.9m | Reduced -50.7k |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.14% of their portfolio | 105.2k $55.2m | Added +7.9k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.10% of their portfolio | 104.2k $54.7m | Added +1.5k |
| ENVESTNET ASSET MANAGEMENT INC 0.02% of their portfolio | 103.4k $54.3m | Reduced -13.3k |
| Capital Research Global Investors 0.01% of their portfolio | 102.1k $53.6m | Added +20.0k |
| MACKENZIE FINANCIAL CORP 0.07% of their portfolio | 101.4k $53.2m | Added +34.5k |