Who owns BCAX (BCAX)
Which tracked institutional funds hold BCAX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BCAX company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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 BCAX is one-sided between 2025-Q4 and 2026-Q1: 57 added or opened and 17 trimmed or exited — on balance accumulating.
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
BCAX’s largest tracked holder by dollar value, RA CAPITAL MANAGEMENT, L.P., sizes it at 1.5% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.5pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BCAX 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 148 tracked filers holding BCAX, 88 increased or opened the position and 63 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 BCAX 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 11
- VANGUARD CAPITAL MANAGEMENT LLC$35M
- Jones Hill Capital LP$25M
- VANGUARD PORTFOLIO MANAGEMENT LLC$6M
- Candriam S.C.A.$5M
- VANGUARD FIDUCIARY TRUST CO$4M
- Walleye Capital LLC$2M
Full exits 7
- VANGUARD GROUP INC$33M
- Soleus Capital Management, L.P.$2M
- JANE STREET GROUP, LLC$1M
- Y-Intercept (Hong Kong) Ltd$1M
- DARK FOREST CAPITAL MANAGEMENT LP$633K
- Trexquant Investment LP$624K
Largest adds
- T. Rowe Price Investment Management, Inc.$129M
- Vestal Point Capital, LP$48M
- Deep Track Capital, LP$37M
- Siren, L.L.C.$28M
- RA CAPITAL MANAGEMENT, L.P.$27M
- JANUS HENDERSON GROUP PLC$22M
Largest trims
- FMR LLC$15M
- MILLENNIUM MANAGEMENT LLC$4M
- BARCLAYS PLC$1M
- CITIGROUP INC$932K
- BNP PARIBAS FINANCIAL MARKETS$811K
- Russell Investments Group, Ltd.$557K
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 |
|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. added | 7,255,993 | $144M | 9.2% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 6,605,780 | $131M | 8.4% | 2026-Q1 |
| Siren, L.L.C. added | 5,802,970 | $115M | 7.4% | 2026-Q1 |
| Vestal Point Capital, LP added | 5,425,000 | $108M | 6.9% | 2026-Q1 |
| Deep Track Capital, LP added | 4,062,500 | $81M | 5.2% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 3,326,918 | $66M | 4.2% | 2026-Q1 |
| RED TREE MANAGEMENT, LLC | 3,170,509 | $63M | 4.0% | 2026-Q1 |
| TPG GP A, LLC | 3,010,425 | $60M | 3.8% | 2026-Q1 |
| BlackRock, Inc. added | 2,843,707 | $57M | 3.6% | 2026-Q1 |
| Omega Fund Management, LLC added | 2,392,150 | $48M | 3.0% | 2026-Q1 |
| Royalty Pharma Sub-Manager, LLC added | 2,388,150 | $47M | 3.0% | 2026-Q1 |
| FMR LLC trimmed | 2,100,878 | $42M | 2.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,774,220 | $35M | 2.3% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 1,659,342 | $33M | 2.1% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 1,621,643 | $32M | 2.1% | 2026-Q1 |
| STATE STREET CORP trimmed | 1,419,388 | $28M | 1.8% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,376,198 | $27M | 1.7% | 2026-Q1 |
| Jones Hill Capital LP new | 1,260,136 | $25M | 1.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 830,906 | $17M | 1.1% | 2026-Q1 |
| FIL Ltd trimmed | 679,904 | $14M | 0.9% | 2026-Q1 |
| ORBIMED ADVISORS LLC added | 667,300 | $13M | 0.8% | 2026-Q1 |
| ACORN CAPITAL ADVISORS, LLC | 643,382 | $13M | 0.8% | 2026-Q1 |
| Aisling Capital Management LP | 568,919 | $11M | 0.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 558,964 | $11M | 0.7% | 2026-Q1 |
| Palo Alto Investors LP added | 550,408 | $11M | 0.7% | 2026-Q1 |
| Rock Springs Capital Management LP added | 489,095 | $10M | 0.6% | 2026-Q1 |
| NAN FUNG TRINITY (HK) LTD added | 427,885 | $9M | 0.5% | 2026-Q1 |
| DAFNA Capital Management LLC added | 421,733 | $8M | 0.5% | 2026-Q1 |
| MORGAN STANLEY added | 421,219 | $8M | 0.5% | 2026-Q1 |
| Ensign Peak Advisors, Inc | 401,444 | $8M | 0.5% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 330,833 | $7M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 327,989 | $7M | 0.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 290,939 | $6M | 0.4% | 2026-Q1 |
| Clearbridge Investments, LLC trimmed | 289,221 | $6M | 0.4% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 276,943 | $6M | 0.4% | 2026-Q1 |
| TD Asset Management Inc added | 269,718 | $5M | 0.3% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 263,985 | $5M | 0.3% | 2026-Q1 |
| NORTHERN TRUST CORP added | 255,571 | $5M | 0.3% | 2026-Q1 |
| Candriam S.C.A. new | 238,822 | $5M | 0.3% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 233,703 | $5M | 0.3% | 2026-Q1 |
| Woodline Partners LP | 232,690 | $5M | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 216,753 | $4M | 0.3% | 2026-Q1 |
| UBS Group AG trimmed | 179,491 | $4M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 177,408 | $3M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 156,702 | $3M | 0.2% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 131,656 | $3M | 0.2% | 2026-Q1 |
| Atle Fund Management AB added | 1,169,634 | $2M | 0.1% | 2026-Q1 |
| Napean Trading & Investment Co (Singapore) PTE Ltd | 113,780 | $2M | 0.1% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 109,261 | $2M | 0.1% | 2026-Q1 |
| Walleye Capital LLC added | 108,008 | $2M | 0.1% | 2026-Q1 |
| Burkehill Global Management, LP new | 100,000 | $2M | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 90,285 | $2M | 0.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 89,881 | $2M | 0.1% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 83,264 | $2M | 0.1% | 2026-Q1 |
| Shay Capital LLC trimmed | 63,500 | $1M | 0.1% | 2026-Q1 |
| SEVEN GRAND MANAGERS, LLC new | 62,500 | $1M | 0.1% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P new | 57,538 | $1M | 0.1% | 2026-Q1 |
| Mariner, LLC trimmed | 55,037 | $1M | 0.1% | 2026-Q1 |
| Swiss National Bank added | 55,000 | $1M | 0.1% | 2026-Q1 |
| SCS Capital Management LLC | 53,430 | $1M | 0.1% | 2026-Q1 |
| ALPS ADVISORS INC added | 51,580 | $1M | 0.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 51,553 | $1M | 0.1% | 2026-Q1 |
| Swiss Life Asset Management Ltd new | 8,651 | $979K | 0.1% | 2026-Q1 |
| Nuveen, LLC added | 43,984 | $875K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 40,747 | $810K | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 40,396 | $803K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 40,209 | $799K | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 38,003 | $756K | 0.0% | 2026-Q1 |
| Invesco Ltd. added | 31,650 | $630K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 1,945,512 | $33M | 2.1% | 2025-Q4 stale |
| BRAIDWELL LP added | 2,162,803 | $28M | 1.8% | 2025-Q1 stale |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,394,676 | $18M | 1.2% | 2025-Q1 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 1,182,900 | $15M | 1.0% | 2025-Q1 stale |
| Blackstone Inc. added | 1,224,336 | $11M | 0.7% | 2025-Q2 stale |
| BAKER BROS. ADVISORS LP | 833,333 | $11M | 0.7% | 2025-Q1 stale |
| Fairmount Funds Management LLC trimmed | 784,170 | $10M | 0.7% | 2025-Q1 stale |
| Foresite Capital Management VI LLC trimmed | 949,260 | $9M | 0.6% | 2025-Q2 stale |
| Schonfeld Strategic Advisors LLC added | 504,085 | $8M | 0.5% | 2025-Q3 stale |
| SECTORAL ASSET MANAGEMENT INC added | 266,495 | $4M | 0.3% | 2025-Q3 stale |
| SILVERARC CAPITAL MANAGEMENT, LLC new | 250,606 | $4M | 0.3% | 2025-Q3 stale |
| Artisan Partners Limited Partnership new | 402,765 | $4M | 0.2% | 2025-Q2 stale |
| Logos Global Management LP trimmed | 400,000 | $4M | 0.2% | 2025-Q2 stale |
| SUPERSTRING CAPITAL MANAGEMENT LP trimmed | 175,902 | $3M | 0.2% | 2025-Q3 stale |
| READYSTATE ASSET MANAGEMENT LP new | 270,200 | $3M | 0.2% | 2025-Q2 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 173,651 | $2M | 0.2% | 2025-Q3 stale |
| MARSHALL WACE, LLP added | 112,086 | $2M | 0.1% | 2025-Q3 stale |
| Soleus Capital Management, L.P. new | 100,000 | $2M | 0.1% | 2025-Q4 stale |
| Verition Fund Management LLC added | 170,962 | $2M | 0.1% | 2025-Q2 stale |
| CANTOR FITZGERALD, L. P. new | 100,000 | $2M | 0.1% | 2025-Q3 stale |
| JANE STREET GROUP, LLC added | 85,583 | $1M | 0.1% | 2025-Q4 stale |
| SPHERA FUNDS MANAGEMENT LTD. added | 85,747 | $1M | 0.1% | 2025-Q3 stale |
| RAYMOND JAMES FINANCIAL INC | 67,701 | $1M | 0.1% | 2025-Q3 stale |
| Y-Intercept (Hong Kong) Ltd new | 59,937 | $1M | 0.1% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC new | 102,525 | $952K | 0.1% | 2025-Q2 stale |
| Skandinaviska Enskilda Banken AB (publ) added | 99,236 | $922K | 0.1% | 2025-Q2 stale |
| Catalio Capital Management, LP new | 97,800 | $909K | 0.1% | 2025-Q2 stale |
| ExodusPoint Capital Management, LP new | 53,882 | $851K | 0.1% | 2025-Q3 stale |
| Cinctive Capital Management LP added | 41,849 | $661K | 0.0% | 2025-Q3 stale |
| DARK FOREST CAPITAL MANAGEMENT LP new | 37,636 | $633K | 0.0% | 2025-Q4 stale |
| Trexquant Investment LP trimmed | 37,094 | $624K | 0.0% | 2025-Q4 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.