Who owns Regeneron Pharmaceuticals (REGN)
Which tracked institutional funds hold REGN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See REGN company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on REGN is one-sided between 2026-Q1 and 2026-Q2: 161 added or opened and 600 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
REGN’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes REGN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in REGN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 1255 tracked filers holding REGN, 576 increased or opened the position and 776 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in REGN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 47
- Jupiter Topco LLC$90M
- Nykredit A/S$26M
- Aquatic Capital Management LLC$20M
- Ranmore Fund Management Ltd$19M
- SteelPeak Wealth, LLC$14M
- Bluespring Wealth Management, LLC$12M
Full exits 117
- Amundi$780M
- Pacer Advisors, Inc.$277M
- JANUS HENDERSON GROUP PLC$162M
- DekaBank Deutsche Girozentrale$161M
- LSV ASSET MANAGEMENT$152M
- Polar Capital Holdings Plc$149M
Largest adds
- Invesco Ltd.$772M
- VANGUARD PORTFOLIO MANAGEMENT LLC$650M
- NORDEA INVESTMENT MANAGEMENT AB$155M
- WORLDQUANT MILLENNIUM ADVISORS LLC$143M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$113M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$90M
Largest trims
- VANGUARD CAPITAL MANAGEMENT LLC$1.0B
- JPMORGAN CHASE & CO$846M
- PRICE T ROWE ASSOCIATES INC /MD/$729M
- FMR LLC$646M
- WELLINGTON MANAGEMENT GROUP LLP$626M
- BlackRock, Inc.$618M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 9,113,506 | $5.7B | 11.6% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 6,629,759 | $4.1B | 8.5% | 2026-Q2 |
| DODGE & COX added | 4,871,137 | $3.0B | 6.2% | 2026-Q2 |
| STATE STREET CORP added | 4,834,688 | $3.0B | 6.2% | 2026-Q2 |
| Invesco Ltd. added | 3,940,665 | $2.5B | 5.0% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 3,774,199 | $2.4B | 4.9% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 3,175,313 | $2.0B | 4.0% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 2,771,839 | $1.7B | 3.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,625,810 | $1.6B | 3.3% | 2026-Q2 |
| Nuveen, LLC trimmed | 2,019,974 | $1.3B | 2.6% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 1,859,172 | $1.2B | 2.4% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,529,709 | $954M | 2.0% | 2026-Q2 |
| MORGAN STANLEY added | 1,397,712 | $872M | 1.8% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 1,291,053 | $805M | 1.6% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 1,270,087 | $792M | 1.6% | 2026-Q2 |
| NORGES BANK added | 1,172,808 | $731M | 1.5% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 1,163,191 | $725M | 1.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 1,126,080 | $702M | 1.4% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 916,467 | $571M | 1.2% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 846,306 | $528M | 1.1% | 2026-Q2 |
| FMR LLC trimmed | 831,964 | $519M | 1.1% | 2026-Q2 |
| Capital World Investors trimmed | 814,925 | $508M | 1.0% | 2026-Q2 |
| Legal & General Group Plc added | 759,971 | $474M | 1.0% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 758,492 | $473M | 1.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 716,560 | $447M | 0.9% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 656,124 | $409M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 563,711 | $351M | 0.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 559,687 | $349M | 0.7% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 547,132 | $341M | 0.7% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 518,409 | $323M | 0.7% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. added | 460,602 | $287M | 0.6% | 2026-Q2 |
| Man Group plc added | 436,956 | $272M | 0.6% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 421,976 | $263M | 0.5% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 399,847 | $249M | 0.5% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 393,685 | $245M | 0.5% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 382,028 | $239M | 0.5% | 2026-Q2 |
| National Pension Service added | 379,815 | $237M | 0.5% | 2026-Q2 |
| NORDEA INVESTMENT MANAGEMENT AB added | 363,479 | $227M | 0.5% | 2026-Q2 |
| WORLDQUANT MILLENNIUM ADVISORS LLC added | 353,970 | $221M | 0.5% | 2026-Q2 |
| CITIGROUP INC added | 346,637 | $216M | 0.4% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 331,560 | $207M | 0.4% | 2026-Q2 |
| Allianz Asset Management GmbH added | 327,683 | $237M | 0.5% | 2026-Q2 |
| UBS Group AG trimmed | 298,234 | $186M | 0.4% | 2026-Q2 |
| Swiss National Bank trimmed | 293,020 | $183M | 0.4% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 292,338 | $226M | 0.5% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 282,199 | $176M | 0.4% | 2026-Q2 |
| FIL Ltd trimmed | 265,490 | $166M | 0.3% | 2026-Q2 |
| TD Asset Management Inc trimmed | 259,317 | $162M | 0.3% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 257,450 | $161M | 0.3% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 256,884 | $160M | 0.3% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 256,503 | $160M | 0.3% | 2026-Q2 |
| BARCLAYS PLC trimmed | 256,192 | $160M | 0.3% | 2026-Q2 |
| Caisse de depot et placement du Quebec trimmed | 250,608 | $156M | 0.3% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 244,927 | $153M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 230,151 | $144M | 0.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 227,457 | $142M | 0.3% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 226,724 | $141M | 0.3% | 2026-Q2 |
| California Public Employees Retirement System added | 224,269 | $140M | 0.3% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 221,607 | $138M | 0.3% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 209,911 | $131M | 0.3% | 2026-Q2 |
| Squarepoint Ops LLC added | 198,567 | $124M | 0.3% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 197,770 | $123M | 0.3% | 2026-Q2 |
| Candriam S.C.A. added | 195,674 | $122M | 0.2% | 2026-Q2 |
| MCDONALD CAPITAL INVESTORS INC/CA trimmed | 193,038 | $120M | 0.2% | 2026-Q2 |
| Swedbank AB trimmed | 189,848 | $118M | 0.2% | 2026-Q2 |
| Epoch Investment Partners, Inc. trimmed | 186,850 | $117M | 0.2% | 2026-Q2 |
| Carmignac Gestion added | 182,507 | $114M | 0.2% | 2026-Q2 |
| BANK OF NOVA SCOTIA added | 181,706 | $113M | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 180,219 | $112M | 0.2% | 2026-Q2 |
| Chevy Chase Trust Holdings, LLC trimmed | 179,056 | $112M | 0.2% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 175,291 | $109M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 174,515 | $109M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 172,896 | $108M | 0.2% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 165,120 | $103M | 0.2% | 2026-Q2 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 163,963 | $102M | 0.2% | 2026-Q2 |
| Bronte Capital Management Pty Ltd. trimmed | 162,618 | $101M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 157,794 | $98M | 0.2% | 2026-Q2 |
| Bellevue Group AG trimmed | 157,291 | $98M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 156,724 | $98M | 0.2% | 2026-Q2 |
| Pictet Asset Management Holding SA trimmed | 153,500 | $96M | 0.2% | 2026-Q2 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ added | 152,322 | $95M | 0.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 148,222 | $92M | 0.2% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 147,961 | $92M | 0.2% | 2026-Q2 |
| Jupiter Topco LLC new | 144,821 | $90M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 140,802 | $88M | 0.2% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 135,783 | $85M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 130,659 | $81M | 0.2% | 2026-Q2 |
| Retirement Systems of Alabama trimmed | 127,869 | $80M | 0.2% | 2026-Q2 |
| Sound Shore Management Inc /CT/ trimmed | 126,994 | $79M | 0.2% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 126,343 | $79M | 0.2% | 2026-Q2 |
| JUPITER ASSET MANAGEMENT LTD added | 126,099 | $79M | 0.2% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ trimmed | 125,812 | $78M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 121,053 | $75M | 0.2% | 2026-Q2 |
| ProShare Advisors LLC trimmed | 119,240 | $74M | 0.2% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 111,369 | $69M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 109,838 | $68M | 0.1% | 2026-Q2 |
| DANSKE BANK A/S added | 107,830 | $67M | 0.1% | 2026-Q2 |
| Gotham Asset Management, LLC added | 105,165 | $66M | 0.1% | 2026-Q2 |
| Harvest Portfolios Group Inc. added | 104,616 | $65M | 0.1% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 103,247 | $64M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.