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-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
13 tracked funds added or opened BBOT while 35 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
BBOT’s largest tracked holder by dollar value, Cormorant Asset Management, LP, sizes it at 7.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 7.0pp 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 2026-Q1 and 2026-Q2, across 64 tracked filers holding BBOT, 36 increased or opened the position and 32 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 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 4
- SPHERA FUNDS MANAGEMENT LTD.$4M
- Catalio Capital Management, LP$2M
- Palumbo Wealth Management LLC$652K
- BANK OF AMERICA CORP /DE/$588K
Full exits 10
- Paradigm Biocapital Advisors LP$8M
- Octagon Capital Advisors LP$6M
- EVENTIDE ASSET MANAGEMENT, LLC$5M
- Ikarian Capital, LLC$2M
- Hudson Bay Capital Management LP$984K
- Woodline Partners LP$928K
Largest adds
- VANGUARD CAPITAL MANAGEMENT LLC$10M
- STATE STREET CORP$6M
- Opaleye Management Inc.$5M
- Granahan Investment Management, LLC$2M
- ARMISTICE CAPITAL, LLC$2M
- BNP PARIBAS FINANCIAL MARKETS$644K
Largest trims
- Cormorant Asset Management, LP$24M
- DEERFIELD MANAGEMENT COMPANY, L.P.$6M
- Omega Fund Management, LLC$4M
- WELLINGTON MANAGEMENT GROUP LLP$4M
- EcoR1 Capital, LLC$4M
- Alphabet Inc.$4M
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 | $136M | 27.4% | 2026-Q2 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 4,885,446 | $37M | 7.5% | 2026-Q2 |
| Omega Fund Management, LLC | 3,289,661 | $25M | 5.0% | 2026-Q2 |
| Alphabet Inc. | 2,823,126 | $22M | 4.3% | 2026-Q2 |
| EcoR1 Capital, LLC | 2,823,126 | $22M | 4.3% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 2,789,302 | $21M | 4.3% | 2026-Q2 |
| ENAVATE SCIENCES GP, LLC | 2,626,946 | $20M | 4.0% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,617,827 | $20M | 4.0% | 2026-Q2 |
| NOVO HOLDINGS A/S added | 2,250,000 | $17M | 3.4% | 2026-Q2 |
| BlackRock, Inc. added | 2,154,040 | $16M | 3.3% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,005,649 | $15M | 3.1% | 2026-Q2 |
| Laurion Capital Management LP added | 2,002,701 | $15M | 3.1% | 2026-Q2 |
| ARMISTICE CAPITAL, LLC added | 1,764,000 | $13M | 2.7% | 2026-Q2 |
| STATE STREET CORP added | 1,036,569 | $8M | 1.6% | 2026-Q2 |
| Aisling Capital Management LP | 1,018,018 | $8M | 1.6% | 2026-Q2 |
| Opaleye Management Inc. added | 700,000 | $5M | 1.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 622,351 | $5M | 1.0% | 2026-Q2 |
| Granahan Investment Management, LLC added | 558,526 | $4M | 0.9% | 2026-Q2 |
| SPHERA FUNDS MANAGEMENT LTD. new | 460,985 | $4M | 0.7% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 400,000 | $3M | 0.6% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 384,941 | $3M | 0.6% | 2026-Q2 |
| Catalio Capital Management, LP trimmed | 318,407 | $2M | 0.5% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 300,000 | $2M | 0.5% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 291,522 | $2M | 0.4% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 286,518 | $2M | 0.4% | 2026-Q2 |
| Casdin Capital, LLC | 282,312 | $2M | 0.4% | 2026-Q2 |
| Ensign Peak Advisors, Inc trimmed | 273,530 | $2M | 0.4% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 244,441 | $2M | 0.4% | 2026-Q2 |
| FMR LLC added | 240,587 | $2M | 0.4% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 191,152 | $1M | 0.3% | 2026-Q2 |
| NORTHERN TRUST CORP added | 186,482 | $1M | 0.3% | 2026-Q2 |
| Sio Capital Management, LLC | 130,628 | $995K | 0.2% | 2026-Q2 |
| UBS Group AG added | 114,655 | $874K | 0.2% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 105,480 | $804K | 0.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 102,085 | $778K | 0.2% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP | 100,000 | $762K | 0.2% | 2026-Q2 |
| Tema ETFs LLC added | 93,339 | $711K | 0.1% | 2026-Q2 |
| Tidal Investments LLC added | 93,339 | $711K | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP added | 88,895 | $691K | 0.1% | 2026-Q2 |
| Palumbo Wealth Management LLC new | 85,624 | $652K | 0.1% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 77,140 | $588K | 0.1% | 2026-Q2 |
| Jump Financial, LLC new | 62,000 | $472K | 0.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 58,600 | $447K | 0.1% | 2026-Q2 |
| Avidity Partners Management LP | 43,853 | $334K | 0.1% | 2026-Q2 |
| TD Asset Management Inc trimmed | 42,730 | $326K | 0.1% | 2026-Q2 |
| Virtus Investment Advisers, LLC new | 42,220 | $322K | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 27,984 | $213K | 0.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP new | 26,485 | $202K | 0.0% | 2026-Q2 |
| Rafferty Asset Management, LLC new | 22,606 | $172K | 0.0% | 2026-Q2 |
| CITIGROUP INC new | 19,872 | $151K | 0.0% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 19,662 | $150K | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 18,163 | $138K | 0.0% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC new | 11,504 | $88K | 0.0% | 2026-Q2 |
| PROFUND ADVISORS LLC new | 11,001 | $84K | 0.0% | 2026-Q2 |
| AXQ CAPITAL, LP trimmed | 10,728 | $82K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 3,380 | $26K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. new | 2,626 | $20K | 0.0% | 2026-Q2 |
| BARCLAYS PLC added | 2,099 | $16K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) new | 1,696 | $13K | 0.0% | 2026-Q2 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO new | 1,350 | $10K | 0.0% | 2026-Q2 |
| Rockefeller Capital Management L.P. added | 1,000 | $8K | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN | 300 | $2K | 0.0% | 2026-Q2 |
| Quarry LP new | 197 | $2K | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd added | 37 | $282 | 0.0% | 2026-Q2 |
| Paradigm Biocapital Advisors LP trimmed | 868,213 | $8M | 1.6% | 2026-Q1 stale (1 quarter behind) |
| Octagon Capital Advisors LP trimmed | 719,000 | $6M | 1.3% | 2026-Q1 stale (1 quarter behind) |
| EVENTIDE ASSET MANAGEMENT, LLC trimmed | 541,181 | $5M | 0.9% | 2026-Q1 stale (1 quarter behind) |
| Ikarian Capital, LLC added | 270,231 | $2M | 0.5% | 2026-Q1 stale (1 quarter behind) |
| Hudson Bay Capital Management LP new | 110,000 | $984K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| Woodline Partners LP | 103,707 | $928K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| BOOTHBAY FUND MANAGEMENT, LLC added | 80,884 | $724K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| HighVista Strategies LLC trimmed | 78,187 | $700K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Qube Research & Technologies Ltd added | 71,925 | $644K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| XTX Topco Ltd added | 59,743 | $535K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| ExodusPoint Capital Management, LP new | 48,122 | $431K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| ACADIAN ASSET MANAGEMENT LLC new | 29,148 | $260K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Diametric Capital, LP new | 16,280 | $146K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Quadrature Capital Ltd added | 13,351 | $119K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Aquatic Capital Management LLC new | 11,793 | $106K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Bellevue Group AG new | 6,982 | $62K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Accent Capital Management, LLC new | 335 | $3K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| ROYAL BANK OF CANADA added | 154 | $1K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| VANGUARD GROUP INC added | 791,095 | $10M | 2.0% | 2025-Q4 stale (2 quarters behind) |
| ADAR1 Capital Management, LLC trimmed | 226,248 | $3M | 0.6% | 2025-Q4 stale (2 quarters behind) |
| STEMPOINT CAPITAL LP trimmed | 86,517 | $1M | 0.2% | 2025-Q4 stale (2 quarters behind) |
| BIT Capital GmbH new | 25,000 | $313K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| Point72 Asset Management, L.P. new | 23,584 | $295K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| Persistent Asset Partners Ltd new | 8,585 | $107K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| CIBC Private Wealth Group LLC new | 5,000 | $63K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| SILVERARC CAPITAL MANAGEMENT, LLC new | 457,414 | $5M | 1.1% | 2025-Q3 stale (3 quarters behind) |
| China Universal Asset Management Co., Ltd. new | 5,000 | $58K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| FNY Investment Advisers, LLC new | 100 | $1K | 0.0% | 2025-Q3 stale (3 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.