Who owns Biomea Fusion (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-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
4 tracked funds added or opened BMEA while 2 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
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 2026-Q1 and 2026-Q2, across 61 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 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.
Largest adds
- FMR LLC$5M
- MARSHALL WACE, LLP$1M
- MAI Capital Management$289K
- JANE STREET GROUP, LLC$252K
Largest trims
- CITADEL ADVISORS LLC$939K
- SUPERSTRING CAPITAL MANAGEMENT LP$297K
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 added | 8,814,946 | $13M | 22.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,829,927 | $4M | 7.1% | 2026-Q2 |
| MARSHALL WACE, LLP added | 2,049,802 | $3M | 5.1% | 2026-Q2 |
| Aisling Capital Management LP | 2,048,757 | $3M | 5.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,455,474 | $2M | 3.6% | 2026-Q2 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. added | 723,176 | $1M | 1.8% | 2026-Q2 |
| BlackRock, Inc. added | 715,445 | $1M | 1.8% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 708,854 | $1M | 1.8% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 612,735 | $901K | 1.5% | 2026-Q2 |
| Mariner, LLC trimmed | 594,726 | $874K | 1.5% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 458,289 | $674K | 1.1% | 2026-Q2 |
| UBS Group AG trimmed | 444,728 | $654K | 1.1% | 2026-Q2 |
| XTX Topco Ltd trimmed | 406,879 | $598K | 1.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 384,459 | $565K | 1.0% | 2026-Q2 |
| MORGAN STANLEY added | 367,021 | $540K | 0.9% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 338,345 | $497K | 0.8% | 2026-Q2 |
| MAI Capital Management added | 289,100 | $425K | 0.7% | 2026-Q2 |
| STATE STREET CORP added | 257,315 | $378K | 0.6% | 2026-Q2 |
| LMR Partners LLP | 200,000 | $261K | 0.4% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 128,526 | $189K | 0.3% | 2026-Q2 |
| Headlands Technologies LLC added | 111,349 | $164K | 0.3% | 2026-Q2 |
| Marex Group Ltd | 100,000 | $147K | 0.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 93,757 | $138K | 0.2% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 84,600 | $124K | 0.2% | 2026-Q2 |
| Jain Global LLC added | 75,698 | $111K | 0.2% | 2026-Q2 |
| GRIFFIN ASSET MANAGEMENT, INC. added | 59,800 | $88K | 0.1% | 2026-Q2 |
| SUPERSTRING CAPITAL MANAGEMENT LP | 250,000 | $85K | 0.1% | 2026-Q2 |
| Graham Capital Management, L.P. trimmed | 53,455 | $79K | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 44,916 | $66K | 0.1% | 2026-Q2 |
| ADAR1 Capital Management, LLC | 43,420 | $64K | 0.1% | 2026-Q2 |
| Rathbones Group PLC | 37,000 | $54K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 34,626 | $51K | 0.1% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 32,792 | $48K | 0.1% | 2026-Q2 |
| PNC Financial Services Group, Inc. | 24,000 | $35K | 0.1% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 15,771 | $23K | 0.0% | 2026-Q2 |
| CFS Investment Advisory Services, LLC | 15,818 | $22K | 0.0% | 2026-Q2 |
| BIRCH FINANCIAL GROUP, LLC | 14,000 | $21K | 0.0% | 2026-Q2 |
| TWO SIGMA SECURITIES, LLC trimmed | 13,976 | $21K | 0.0% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 12,699 | $19K | 0.0% | 2026-Q2 |
| Creative Planning | 12,000 | $18K | 0.0% | 2026-Q2 |
| NewEdge Advisors, LLC new | 12,000 | $18K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 10,800 | $16K | 0.0% | 2026-Q2 |
| FORTEM FINANCIAL GROUP, LLC new | 10,000 | $15K | 0.0% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 7,485 | $11K | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. added | 7,092 | $10K | 0.0% | 2026-Q2 |
| Federation des caisses Desjardins du Quebec new | 6,500 | $10K | 0.0% | 2026-Q2 |
| Markowski Investments new | 5,500 | $8K | 0.0% | 2026-Q2 |
| CITIGROUP INC added | 4,698 | $7K | 0.0% | 2026-Q2 |
| SIGNATUREFD, LLC | 3,500 | $5K | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 2,942 | $4K | 0.0% | 2026-Q2 |
| Rockefeller Capital Management L.P. | 2,000 | $3K | 0.0% | 2026-Q2 |
| BARCLAYS PLC trimmed | 1,593 | $2K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 1,053 | $2K | 0.0% | 2026-Q2 |
| Fortitude Family Office, LLC | 454 | $667 | 0.0% | 2026-Q2 |
| Global Retirement Partners, LLC | 375 | $551 | 0.0% | 2026-Q2 |
| Glen Eagle Advisors, LLC | 250 | $368 | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP | 128 | $169 | 0.0% | 2026-Q2 |
| Allied Private Wealth LLC new | 123 | $159 | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd added | 68 | $100 | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 99 | — | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 0 | — | 0.0% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 310,514 | $475K | 0.8% | 2026-Q1 stale (1 quarter behind) |
| HRT FINANCIAL LP added | 47,852 | $73K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Quadrature Capital Ltd trimmed | 46,162 | $71K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| GROUP ONE TRADING LLC added | 41,519 | $64K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| NINE MASTS CAPITAL Ltd new | 32,472 | $50K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| GSA CAPITAL PARTNERS LLP added | 29,517 | $45K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| DIMENSIONAL FUND ADVISORS LP | 25,339 | $39K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| MILLENNIUM MANAGEMENT LLC trimmed | 18,335 | $28K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Virtu Financial LLC trimmed | 16,763 | $26K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Catalyst Funds Management Pty Ltd added | 16,800 | $26K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Vanguard Personalized Indexing Management, LLC trimmed | 13,703 | $21K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Shay Capital LLC new | 10,000 | $15K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| VANGUARD GROUP INC added | 2,968,041 | $4M | 6.2% | 2025-Q4 stale (2 quarters behind) |
| Woodline Partners LP | 1,300,834 | $2M | 2.7% | 2025-Q4 stale (2 quarters behind) |
| TWO SIGMA ADVISERS, LP trimmed | 105,800 | $131K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| Sculptor Capital LP | 84,800 | $105K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| Cormorant Asset Management, LP | 3,570,872 | $7M | 12.2% | 2025-Q3 stale (3 quarters behind) |
| HEIGHTS CAPITAL MANAGEMENT, INC trimmed | 1,437,646 | $3M | 4.9% | 2025-Q3 stale (3 quarters behind) |
| Squarepoint Ops LLC trimmed | 22,793 | $46K | 0.1% | 2025-Q3 stale (3 quarters behind) |
| Scientech Research LLC new | 12,207 | $25K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| China Universal Asset Management Co., Ltd. added | 10,431 | $21K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Point72 Asia (Singapore) Pte. Ltd. trimmed | 10,029 | $20K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Tower Research Capital LLC (TRC) trimmed | 7,160 | $14K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Cubist Systematic Strategies, LLC added | 3,369 | $7K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Blue Owl Capital Holdings LP new | 1,300,000 | $2M | 4.0% | 2025-Q2 stale (4 quarters behind) |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 500,000 | $900K | 1.5% | 2025-Q2 stale (4 quarters behind) |
| Burkehill Global Management, LP new | 350,000 | $630K | 1.1% | 2025-Q2 stale (4 quarters behind) |
| AQR CAPITAL MANAGEMENT LLC added | 338,346 | $609K | 1.0% | 2025-Q2 stale (4 quarters behind) |
| SCOTIA CAPITAL INC. new | 255,000 | $459K | 0.8% | 2025-Q2 stale (4 quarters behind) |
| JANUS HENDERSON GROUP PLC new | 150,761 | $272K | 0.5% | 2025-Q2 stale (4 quarters behind) |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 116,549 | $210K | 0.4% | 2025-Q2 stale (4 quarters behind) |
| SIMPLEX TRADING, LLC new | 65,333 | $117K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| Jefferies Financial Group Inc. new | 41,728 | $75K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| IEQ CAPITAL, LLC trimmed | 38,511 | $69K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| Maia Wealth LLC added | 18,316 | $33K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| LPL Financial LLC trimmed | 15,296 | $28K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Engineers Gate Manager LP trimmed | 14,498 | $26K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| SG Americas Securities, LLC trimmed | 10,953 | $20K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Quarry LP new | 4,859 | $9K | 0.0% | 2025-Q2 stale (4 quarters behind) |
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.