Who owns BZAI (BZAI)
Which tracked institutional funds hold BZAI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BZAI 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
10 tracked funds added or opened BZAI while 8 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
BZAI’s largest tracked holder by dollar value, METEORA CAPITAL, LLC, sizes it at 4.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 4.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BZAI 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 127 tracked filers holding BZAI, 77 increased or opened the position and 45 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 BZAI 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 5
- VANGUARD CAPITAL MANAGEMENT LLC$7M
- LAZARD ASSET MANAGEMENT LLC$2M
- Themes Management Co LLC$2M
- VANGUARD PORTFOLIO MANAGEMENT LLC$937K
- VANGUARD FIDUCIARY TRUST CO$747K
Full exits 4
- VANGUARD GROUP INC$8M
- MILLENNIUM MANAGEMENT LLC$2M
- MARSHALL WACE, LLP$2M
- Polar Asset Management Partners Inc.$759K
Largest adds
- RENAISSANCE TECHNOLOGIES LLC$2M
- AQR CAPITAL MANAGEMENT LLC$2M
- MORGAN STANLEY$884K
- BlackRock, Inc.$702K
- Vontobel Holding Ltd.$255K
Largest trims
- Temasek Holdings (Private) Ltd$8M
- Q Global Advisors, LLC$3M
- CITADEL ADVISORS LLC$856K
- JANE STREET GROUP, LLC$514K
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 |
|---|---|---|---|---|
| Q Global Advisors, LLC | 150,000 | $57M | 6.8% | 2026-Q1 |
| BlackRock, Inc. added | 5,644,826 | $10M | 1.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,584,327 | $7M | 0.8% | 2026-Q1 |
| Temasek Holdings (Private) Ltd trimmed | 2,594,264 | $5M | 0.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,774,594 | $3M | 0.4% | 2026-Q1 |
| UBS Group AG added | 1,542,474 | $3M | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,404,159 | $3M | 0.3% | 2026-Q1 |
| STATE STREET CORP added | 1,379,508 | $3M | 0.3% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC new | 1,204,204 | $2M | 0.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 1,150,890 | $2M | 0.3% | 2026-Q1 |
| MORGAN STANLEY added | 912,776 | $2M | 0.2% | 2026-Q1 |
| Themes Management Co LLC new | 841,000 | $2M | 0.2% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. | 769,231 | $1M | 0.2% | 2026-Q1 |
| NORTHERN TRUST CORP added | 657,664 | $1M | 0.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 585,446 | $1M | 0.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 514,632 | $937K | 0.1% | 2026-Q1 |
| AlphaCore Capital LLC added | 440,348 | $801K | 0.1% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 410,532 | $747K | 0.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 271,862 | $495K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 262,837 | $478K | 0.1% | 2026-Q1 |
| X-Square Capital, LLC | 200,000 | $364K | 0.0% | 2026-Q1 |
| Calamos Advisors LLC | 1,000,000 | $350K | 0.0% | 2026-Q1 |
| Caption Management, LLC | 898,556 | $341K | 0.0% | 2026-Q1 |
| Saba Capital Management, L.P. | 874,225 | $332K | 0.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. | 900,000 | $315K | 0.0% | 2026-Q1 |
| NOTABLE CAPITAL MANAGEMENT, L.L.C. | 163,670 | $298K | 0.0% | 2026-Q1 |
| HRT FINANCIAL LP added | 163,459 | $297K | 0.0% | 2026-Q1 |
| Vontobel Holding Ltd. added | 162,372 | $296K | 0.0% | 2026-Q1 |
| MMCAP International Inc. SPC | 750,000 | $285K | 0.0% | 2026-Q1 |
| Bank of New York Mellon Corp added | 154,832 | $282K | 0.0% | 2026-Q1 |
| IEQ CAPITAL, LLC new | 145,595 | $265K | 0.0% | 2026-Q1 |
| LOS ANGELES CAPITAL MANAGEMENT LLC new | 142,466 | $259K | 0.0% | 2026-Q1 |
| LMR Partners LLP | 615,000 | $234K | 0.0% | 2026-Q1 |
| Nuveen, LLC added | 115,705 | $211K | 0.0% | 2026-Q1 |
| Forum Financial Management, LP | 115,488 | $210K | 0.0% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. added | 559,887 | $207K | 0.0% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. new | 109,519 | $199K | 0.0% | 2026-Q1 |
| Mariner, LLC added | 107,643 | $196K | 0.0% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 102,500 | $187K | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 115,969 | $183K | 0.0% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 93,844 | $171K | 0.0% | 2026-Q1 |
| Caitong International Asset Management Co., Ltd added | 93,617 | $170K | 0.0% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 89,667 | $163K | 0.0% | 2026-Q1 |
| Hudson Bay Capital Management LP trimmed | 455,788 | $160K | 0.0% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC added | 405,376 | $154K | 0.0% | 2026-Q1 |
| BRC Group Holdings, Inc. | 83,353 | $152K | 0.0% | 2026-Q1 |
| ProShare Advisors LLC trimmed | 78,549 | $143K | 0.0% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 76,983 | $140K | 0.0% | 2026-Q1 |
| PCM Encore, LLC new | 74,058 | $135K | 0.0% | 2026-Q1 |
| DEUTSCHE BANK AG\ | 71,226 | $130K | 0.0% | 2026-Q1 |
| CWM, LLC added | 70,379 | $128K | 0.0% | 2026-Q1 |
| FRANKLIN RESOURCES INC | 62,540 | $114K | 0.0% | 2026-Q1 |
| Platform Technology Partners | 59,333 | $108K | 0.0% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 55,429 | $101K | 0.0% | 2026-Q1 |
| Gryphon Financial Partners LLC | 49,954 | $91K | 0.0% | 2026-Q1 |
| Cerity Partners LLC new | 47,368 | $86K | 0.0% | 2026-Q1 |
| Sculptor Capital LP trimmed | 222,710 | $82K | 0.0% | 2026-Q1 |
| Cetera Investment Advisers added | 44,284 | $81K | 0.0% | 2026-Q1 |
| WHITEBOX ADVISORS LLC | 209,250 | $80K | 0.0% | 2026-Q1 |
| BARCLAYS PLC trimmed | 42,702 | $78K | 0.0% | 2026-Q1 |
| Clear Street Group Inc. | 201,429 | $77K | 0.0% | 2026-Q1 |
| Invesco Ltd. added | 41,152 | $75K | 0.0% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 39,200 | $72K | 0.0% | 2026-Q1 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC new | 39,257 | $70K | 0.0% | 2026-Q1 |
| Vivaldi Capital Management LP | 37,439 | $68K | 0.0% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 37,070 | $67K | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 32,376 | $59K | 0.0% | 2026-Q1 |
| Worth Venture Partners, LLC new | 28,600 | $52K | 0.0% | 2026-Q1 |
| Creative Planning | 134,700 | $51K | 0.0% | 2026-Q1 |
| Kera Capital Partners, Inc. added | 26,467 | $48K | 0.0% | 2026-Q1 |
| Chicago Partners Investment Group LLC added | 21,919 | $47K | 0.0% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 25,575 | $47K | 0.0% | 2026-Q1 |
| STEEL GROVE CAPITAL ADVISORS, LLC new | 25,000 | $46K | 0.0% | 2026-Q1 |
| MERCER GLOBAL ADVISORS INC /ADV new | 24,526 | $45K | 0.0% | 2026-Q1 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 24,402 | $44K | 0.0% | 2026-Q1 |
| METEORA CAPITAL, LLC added | 793,489 | $493M | 59.1% | 2025-Q3 stale |
| Clear Street Derivatives LLC | 537,998 | $207M | 24.8% | 2025-Q2 stale |
| VANGUARD GROUP INC added | 3,893,026 | $8M | 0.9% | 2025-Q4 stale |
| BOOTHBAY FUND MANAGEMENT, LLC new | 343,594 | $4M | 0.5% | 2025-Q1 stale |
| MILLENNIUM MANAGEMENT LLC new | 967,607 | $2M | 0.2% | 2025-Q4 stale |
| MARSHALL WACE, LLP trimmed | 859,131 | $2M | 0.2% | 2025-Q4 stale |
| Harraden Circle Investments, LLC new | 523,424 | $1M | 0.1% | 2025-Q1 stale |
| RK Capital Management, LLC/FL new | 244,777 | $844K | 0.1% | 2025-Q3 stale |
| Polar Asset Management Partners Inc. added | 389,127 | $759K | 0.1% | 2025-Q4 stale |
| ATW SPAC MANAGEMENT LLC new | 343,594 | $694K | 0.1% | 2025-Q1 stale |
| Quarry LP trimmed | 51,148 | $669K | 0.1% | 2025-Q2 stale |
| RAYMOND JAMES FINANCIAL INC added | 221,281 | $431K | 0.1% | 2025-Q4 stale |
| AQR Arbitrage LLC new | 100,000 | $298K | 0.0% | 2025-Q2 stale |
| TWO SIGMA INVESTMENTS, LP added | 113,576 | $221K | 0.0% | 2025-Q4 stale |
| Quantbot Technologies LP added | 79,255 | $155K | 0.0% | 2025-Q4 stale |
| Atom Investors LP new | 74,172 | $145K | 0.0% | 2025-Q4 stale |
| Verition Fund Management LLC added | 74,035 | $144K | 0.0% | 2025-Q4 stale |
| HighTower Advisors, LLC | 39,963 | $138K | 0.0% | 2025-Q3 stale |
| OMERS ADMINISTRATION Corp new | 61,000 | $123K | 0.0% | 2025-Q1 stale |
| CLEAR STREET LLC added | 291,429 | $112K | 0.0% | 2025-Q2 stale |
| ExodusPoint Capital Management, LP new | 46,536 | $91K | 0.0% | 2025-Q4 stale |
| Aristides Capital LLC new | 43,855 | $86K | 0.0% | 2025-Q4 stale |
| GROUP ONE TRADING LLC new | 38,596 | $75K | 0.0% | 2025-Q4 stale |
| Virtu Financial LLC added | 33,641 | $66K | 0.0% | 2025-Q4 stale |
| SkyView Investment Advisors, LLC | 100,000 | $62K | 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.