Who owns Biomea Fusion, Inc. (BMEA)
Which tracked institutional funds hold BMEA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BMEA company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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
11 tracked funds added or opened BMEA while 4 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
BMEA’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes BMEA more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in BMEA 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 2025-Q4 and 2026-Q1, across 64 tracked filers holding BMEA, 32 increased or opened the position and 26 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 BMEA between the 2025-Q4 and 2026-Q1 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 3
- VANGUARD CAPITAL MANAGEMENT LLC$4M
- CITADEL ADVISORS LLC$1M
- VANGUARD FIDUCIARY TRUST CO$514K
Full exits 2
- VANGUARD GROUP INC$4M
- Woodline Partners LP$2M
Largest adds
- RENAISSANCE TECHNOLOGIES LLC$1M
- Aisling Capital Management LP$594K
- XTX Topco Ltd$488K
- MARSHALL WACE, LLP$395K
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$371K
- JANE STREET GROUP, LLC$336K
Largest trims
- FMR LLC$3M
- FEDERATED HERMES, INC.$375K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC trimmed | 4,882,196 | $7M | 13.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,597,300 | $4M | 7.0% | 2026-Q1 |
| Aisling Capital Management LP | 2,048,757 | $3M | 5.5% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,312,798 | $2M | 3.5% | 2026-Q1 |
| MARSHALL WACE, LLP added | 1,198,551 | $2M | 3.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 656,817 | $1M | 1.8% | 2026-Q1 |
| Mariner, LLC added | 654,578 | $1M | 1.8% | 2026-Q1 |
| BlackRock, Inc. added | 641,435 | $981K | 1.7% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 629,865 | $964K | 1.7% | 2026-Q1 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. trimmed | 557,036 | $852K | 1.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 548,186 | $839K | 1.5% | 2026-Q1 |
| XTX Topco Ltd added | 530,542 | $812K | 1.4% | 2026-Q1 |
| UBS Group AG added | 515,555 | $789K | 1.4% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 388,696 | $595K | 1.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 346,742 | $531K | 0.9% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 336,115 | $514K | 0.9% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 310,514 | $475K | 0.8% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 275,655 | $422K | 0.7% | 2026-Q1 |
| SUPERSTRING CAPITAL MANAGEMENT LP | 250,000 | $382K | 0.7% | 2026-Q1 |
| NORTHERN TRUST CORP | 208,965 | $320K | 0.6% | 2026-Q1 |
| STATE STREET CORP added | 208,015 | $318K | 0.6% | 2026-Q1 |
| LMR Partners LLP added | 200,000 | $267K | 0.5% | 2026-Q1 |
| Headlands Technologies LLC new | 105,599 | $162K | 0.3% | 2026-Q1 |
| Marex Group plc | 100,000 | $153K | 0.3% | 2026-Q1 |
| MAI Capital Management added | 89,100 | $136K | 0.2% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 84,600 | $129K | 0.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 75,739 | $116K | 0.2% | 2026-Q1 |
| GRIFFIN ASSET MANAGEMENT, INC. | 58,300 | $89K | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 51,606 | $79K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP added | 47,852 | $73K | 0.1% | 2026-Q1 |
| Quadrature Capital Ltd trimmed | 46,162 | $71K | 0.1% | 2026-Q1 |
| ADAR1 Capital Management, LLC | 43,420 | $66K | 0.1% | 2026-Q1 |
| GROUP ONE TRADING LLC added | 41,519 | $64K | 0.1% | 2026-Q1 |
| Rathbones Group PLC new | 37,000 | $57K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 34,626 | $53K | 0.1% | 2026-Q1 |
| TWO SIGMA SECURITIES, LLC trimmed | 33,195 | $51K | 0.1% | 2026-Q1 |
| NINE MASTS CAPITAL Ltd new | 32,472 | $50K | 0.1% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 29,517 | $45K | 0.1% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP | 25,339 | $39K | 0.1% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. | 24,000 | $37K | 0.1% | 2026-Q1 |
| CFS Investment Advisory Services, LLC added | 15,818 | $35K | 0.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 18,335 | $28K | 0.0% | 2026-Q1 |
| Virtu Financial LLC trimmed | 16,763 | $26K | 0.0% | 2026-Q1 |
| Catalyst Funds Management Pty Ltd added | 16,800 | $26K | 0.0% | 2026-Q1 |
| BIRCH FINANCIAL GROUP, LLC | 14,000 | $21K | 0.0% | 2026-Q1 |
| Vanguard Personalized Indexing Management, LLC trimmed | 13,703 | $21K | 0.0% | 2026-Q1 |
| Creative Planning | 12,000 | $18K | 0.0% | 2026-Q1 |
| Shay Capital LLC new | 10,000 | $15K | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. added | 7,079 | $11K | 0.0% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 6,969 | $11K | 0.0% | 2026-Q1 |
| Cormorant Asset Management, LP | 3,570,872 | $7M | 12.6% | 2025-Q3 stale |
| VANGUARD GROUP INC added | 2,968,041 | $4M | 6.4% | 2025-Q4 stale |
| HEIGHTS CAPITAL MANAGEMENT, INC trimmed | 1,437,646 | $3M | 5.1% | 2025-Q3 stale |
| Blue Owl Capital Holdings LP new | 1,300,000 | $2M | 4.1% | 2025-Q2 stale |
| Nuveen, LLC new | 270,087 | $2M | 3.7% | 2025-Q1 stale |
| Woodline Partners LP | 1,300,834 | $2M | 2.8% | 2025-Q4 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 500,000 | $900K | 1.6% | 2025-Q2 stale |
| Burkehill Global Management, LP new | 350,000 | $630K | 1.1% | 2025-Q2 stale |
| AQR CAPITAL MANAGEMENT LLC added | 338,346 | $609K | 1.1% | 2025-Q2 stale |
| SCOTIA CAPITAL INC. new | 255,000 | $459K | 0.8% | 2025-Q2 stale |
| DEUTSCHE BANK AG\ trimmed | 177,842 | $379K | 0.7% | 2025-Q1 stale |
| OPPENHEIMER & CO INC added | 165,937 | $353K | 0.6% | 2025-Q1 stale |
| JANUS HENDERSON GROUP PLC added | 150,761 | $272K | 0.5% | 2025-Q2 stale |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 116,549 | $210K | 0.4% | 2025-Q2 stale |
| WEXFORD CAPITAL LP trimmed | 90,384 | $193K | 0.3% | 2025-Q1 stale |
| Walleye Capital LLC trimmed | 87,089 | $186K | 0.3% | 2025-Q1 stale |
| ArrowMark Colorado Holdings LLC | 76,285 | $162K | 0.3% | 2025-Q1 stale |
| Bank of New York Mellon Corp trimmed | 73,586 | $157K | 0.3% | 2025-Q1 stale |
| ALLIANCEBERNSTEIN L.P. | 63,300 | $135K | 0.2% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP trimmed | 105,800 | $131K | 0.2% | 2025-Q4 stale |
| SIMPLEX TRADING, LLC added | 65,333 | $117K | 0.2% | 2025-Q2 stale |
| EXCHANGE TRADED CONCEPTS, LLC added | 50,550 | $108K | 0.2% | 2025-Q1 stale |
| Sculptor Capital LP | 84,800 | $105K | 0.2% | 2025-Q4 stale |
| D. E. Shaw & Co., Inc. trimmed | 45,238 | $96K | 0.2% | 2025-Q1 stale |
| SEI INVESTMENTS CO added | 38,253 | $81K | 0.1% | 2025-Q1 stale |
| Jefferies Financial Group Inc. new | 41,728 | $75K | 0.1% | 2025-Q2 stale |
| IEQ CAPITAL, LLC trimmed | 38,511 | $69K | 0.1% | 2025-Q2 stale |
| Jain Global LLC added | 55,200 | $68K | 0.1% | 2025-Q4 stale |
| Squarepoint Ops LLC trimmed | 22,793 | $46K | 0.1% | 2025-Q3 stale |
| PRICE T ROWE ASSOCIATES INC /MD/ | 19,352 | $42K | 0.1% | 2025-Q1 stale |
| INTECH INVESTMENT MANAGEMENT LLC added | 19,273 | $41K | 0.1% | 2025-Q1 stale |
| Cerity Partners LLC new | 17,500 | $37K | 0.1% | 2025-Q1 stale |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 16,531 | $35K | 0.1% | 2025-Q1 stale |
| Maia Wealth LLC added | 18,316 | $33K | 0.1% | 2025-Q2 stale |
| Verition Fund Management LLC trimmed | 14,117 | $30K | 0.1% | 2025-Q1 stale |
| Corebridge Financial, Inc. trimmed | 13,539 | $29K | 0.1% | 2025-Q1 stale |
| LPL Financial LLC trimmed | 15,296 | $28K | 0.0% | 2025-Q2 stale |
| WOLVERINE TRADING, LLC added | 11,831 | $27K | 0.0% | 2025-Q1 stale |
| Engineers Gate Manager LP trimmed | 14,498 | $26K | 0.0% | 2025-Q2 stale |
| Scientech Research LLC added | 12,207 | $25K | 0.0% | 2025-Q3 stale |
| Invesco Ltd. trimmed | 10,959 | $23K | 0.0% | 2025-Q1 stale |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 10,743 | $23K | 0.0% | 2025-Q1 stale |
| Point72 Asset Management, L.P. new | 17,261 | $21K | 0.0% | 2025-Q4 stale |
| China Universal Asset Management Co., Ltd. added | 10,431 | $21K | 0.0% | 2025-Q3 stale |
| Qube Research & Technologies Ltd trimmed | 10,032 | $20K | 0.0% | 2025-Q3 stale |
| Point72 Asia (Singapore) Pte. Ltd. trimmed | 10,029 | $20K | 0.0% | 2025-Q3 stale |
| SG Americas Securities, LLC trimmed | 10,953 | $20K | 0.0% | 2025-Q2 stale |
| NEW YORK STATE COMMON RETIREMENT FUND | 8,178 | $17K | 0.0% | 2025-Q1 stale |
| Tower Research Capital LLC (TRC) trimmed | 7,160 | $14K | 0.0% | 2025-Q3 stale |
| Police & Firemen's Retirement System of New Jersey | 6,195 | $13K | 0.0% | 2025-Q1 stale |
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.