Who owns BridgeBio Oncology Therapeutics (BBOT)
Which tracked institutional funds hold BBOT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BBOT company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-28). 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
12 tracked funds added or opened BBOT while 35 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
BBOT’s largest tracked holder by dollar value, Cormorant Asset Management, LP, sizes it at 8.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 8.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BBOT 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 67 tracked filers holding BBOT, 43 increased or opened the position and 20 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 BBOT 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 9
- ROYCE & ASSOCIATES LP$6M
- VANGUARD CAPITAL MANAGEMENT LLC$5M
- Ensign Peak Advisors, Inc$3M
- VANGUARD FIDUCIARY TRUST CO$2M
- SCHRODER INVESTMENT MANAGEMENT GROUP$2M
- Granahan Investment Management, LLC$2M
Full exits 4
- Catalio Capital Management, LP$31M
- VANGUARD GROUP INC$10M
- ADAR1 Capital Management, LLC$3M
- STEMPOINT CAPITAL LP$1M
Largest adds
- Aisling Capital Management LP$2M
- BNP PARIBAS FINANCIAL MARKETS$481K
- GOLDMAN SACHS GROUP INC$315K
Largest trims
- Cormorant Asset Management, LP$64M
- Paradigm Biocapital Advisors LP$21M
- DEERFIELD MANAGEMENT COMPANY, L.P.$17M
- ADAGE CAPITAL PARTNERS GP, L.L.C.$14M
- Omega Fund Management, LLC$12M
- WELLINGTON MANAGEMENT GROUP LLP$11M
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 |
|---|---|---|---|---|
| Cormorant Asset Management, LP | 17,878,594 | $160M | 28.6% | 2026-Q1 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 4,885,446 | $44M | 7.8% | 2026-Q1 |
| Omega Fund Management, LLC | 3,289,661 | $29M | 5.3% | 2026-Q1 |
| EcoR1 Capital, LLC | 2,823,126 | $25M | 4.5% | 2026-Q1 |
| Alphabet Inc. | 2,823,126 | $25M | 4.5% | 2026-Q1 |
| ENAVATE SCIENCES GP, LLC | 2,626,946 | $24M | 4.2% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 2,789,302 | $21M | 3.8% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,617,827 | $20M | 3.6% | 2026-Q2 |
| NOVO HOLDINGS A/S added | 2,185,923 | $20M | 3.5% | 2026-Q1 |
| Laurion Capital Management LP added | 1,922,656 | $17M | 3.1% | 2026-Q1 |
| BlackRock, Inc. added | 2,154,040 | $16M | 2.9% | 2026-Q2 |
| ARMISTICE CAPITAL, LLC added | 1,328,000 | $12M | 2.1% | 2026-Q1 |
| Aisling Capital Management LP added | 1,018,018 | $9M | 1.6% | 2026-Q1 |
| STATE STREET CORP added | 1,036,569 | $8M | 1.4% | 2026-Q2 |
| Paradigm Biocapital Advisors LP trimmed | 868,213 | $8M | 1.4% | 2026-Q1 |
| Octagon Capital Advisors LP trimmed | 719,000 | $6M | 1.2% | 2026-Q1 |
| ROYCE & ASSOCIATES LP new | 636,522 | $6M | 1.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 579,234 | $5M | 0.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 538,441 | $5M | 0.9% | 2026-Q1 |
| EVENTIDE ASSET MANAGEMENT, LLC trimmed | 541,181 | $5M | 0.8% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 400,000 | $4M | 0.6% | 2026-Q1 |
| Ensign Peak Advisors, Inc new | 320,874 | $3M | 0.5% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 290,806 | $3M | 0.5% | 2026-Q1 |
| Casdin Capital, LLC | 282,312 | $3M | 0.5% | 2026-Q1 |
| Ikarian Capital, LLC added | 270,231 | $2M | 0.4% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 300,000 | $2M | 0.4% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO new | 254,329 | $2M | 0.4% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP new | 249,161 | $2M | 0.4% | 2026-Q1 |
| Granahan Investment Management, LLC new | 231,040 | $2M | 0.4% | 2026-Q1 |
| FMR LLC added | 240,587 | $2M | 0.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 167,573 | $1M | 0.3% | 2026-Q1 |
| Sio Capital Management, LLC | 130,628 | $1M | 0.2% | 2026-Q1 |
| Hudson Bay Capital Management LP new | 110,000 | $984K | 0.2% | 2026-Q1 |
| Woodline Partners LP | 103,707 | $928K | 0.2% | 2026-Q1 |
| NORTHERN TRUST CORP added | 102,258 | $915K | 0.2% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP | 100,000 | $895K | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 90,819 | $813K | 0.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 105,480 | $804K | 0.1% | 2026-Q2 |
| Tema ETFs LLC new | 82,172 | $735K | 0.1% | 2026-Q1 |
| Tidal Investments LLC new | 82,172 | $735K | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 80,884 | $724K | 0.1% | 2026-Q1 |
| HighVista Strategies LLC trimmed | 78,187 | $700K | 0.1% | 2026-Q1 |
| Brevan Howard Capital Management LP added | 88,895 | $691K | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 71,925 | $644K | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 59,743 | $535K | 0.1% | 2026-Q1 |
| TD Asset Management Inc trimmed | 57,572 | $515K | 0.1% | 2026-Q1 |
| Opaleye Management Inc. new | 53,282 | $477K | 0.1% | 2026-Q1 |
| UBS Group AG trimmed | 50,450 | $452K | 0.1% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 58,600 | $447K | 0.1% | 2026-Q2 |
| ExodusPoint Capital Management, LP new | 48,122 | $431K | 0.1% | 2026-Q1 |
| Avidity Partners Management LP new | 43,853 | $392K | 0.1% | 2026-Q1 |
| MORGAN STANLEY added | 43,374 | $388K | 0.1% | 2026-Q1 |
| Squarepoint Ops LLC added | 43,190 | $387K | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 35,692 | $319K | 0.1% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC new | 29,148 | $260K | 0.0% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP new | 26,485 | $202K | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC new | 18,163 | $163K | 0.0% | 2026-Q1 |
| AXQ CAPITAL, LP new | 17,347 | $155K | 0.0% | 2026-Q1 |
| Diametric Capital, LP new | 16,280 | $146K | 0.0% | 2026-Q1 |
| Quadrature Capital Ltd added | 13,351 | $119K | 0.0% | 2026-Q1 |
| Aquatic Capital Management LLC new | 11,793 | $106K | 0.0% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC new | 11,504 | $88K | 0.0% | 2026-Q2 |
| Bellevue Group AG new | 6,982 | $62K | 0.0% | 2026-Q1 |
| Rockefeller Capital Management L.P. | 700 | $6K | 0.0% | 2026-Q1 |
| Accent Capital Management, LLC new | 335 | $3K | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN | 300 | $3K | 0.0% | 2026-Q1 |
| BARCLAYS PLC new | 212 | $2K | 0.0% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 154 | $1K | 0.0% | 2026-Q1 |
| Caitong International Asset Management Co., Ltd new | 4 | $36 | 0.0% | 2026-Q1 |
| Catalio Capital Management, LP new | 410,700 | $31M | 5.6% | 2025-Q4 stale |
| VANGUARD GROUP INC added | 791,095 | $10M | 1.8% | 2025-Q4 stale |
| SILVERARC CAPITAL MANAGEMENT, LLC new | 457,414 | $5M | 0.9% | 2025-Q3 stale |
| ADAR1 Capital Management, LLC trimmed | 226,248 | $3M | 0.5% | 2025-Q4 stale |
| STEMPOINT CAPITAL LP trimmed | 86,517 | $1M | 0.2% | 2025-Q4 stale |
| BIT Capital GmbH new | 25,000 | $313K | 0.1% | 2025-Q4 stale |
| Point72 Asset Management, L.P. new | 23,584 | $295K | 0.1% | 2025-Q4 stale |
| Persistent Asset Partners Ltd new | 8,585 | $107K | 0.0% | 2025-Q4 stale |
| CIBC Private Wealth Group LLC new | 5,000 | $63K | 0.0% | 2025-Q4 stale |
| China Universal Asset Management Co., Ltd. new | 5,000 | $58K | 0.0% | 2025-Q3 stale |
| BANK OF AMERICA CORP /DE/ added | 3,990 | $50K | 0.0% | 2025-Q4 stale |
| FNY Investment Advisers, LLC new | 100 | $1K | 0.0% | 2025-Q3 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.