Who owns BEST SPAC I Acquisition Corp. (BSAA)
Which tracked institutional funds hold BSAA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BSAA company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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
2 tracked funds added or opened BSAA while 2 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
BSAA’s largest tracked holder by dollar value, METEORA CAPITAL, LLC, sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BSAA 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 36 tracked filers holding BSAA, 12 increased or opened the position and 8 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 BSAA 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.
Largest adds
- BERKLEY W R CORP$1M
- TORONTO DOMINION BANK$444K
Largest trims
- METEORA CAPITAL, LLC$6M
- MANGROVE PARTNERS IM, LLC$2M
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 |
|---|---|---|---|---|
| METEORA CAPITAL, LLC trimmed | 90,783 | $9M | 18.3% | 2026-Q1 |
| MIZUHO SECURITIES USA LLC | 533,699 | $5M | 10.9% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC added | 518,575 | $5M | 10.7% | 2026-Q1 |
| BERKLEY W R CORP added | 437,808 | $4M | 9.0% | 2026-Q1 |
| GLAZER CAPITAL, LLC trimmed | 193,207 | $2M | 4.0% | 2026-Q1 |
| Polar Asset Management Partners Inc. added | 185,100 | $2M | 3.8% | 2026-Q1 |
| HEIGHTS CAPITAL MANAGEMENT, INC | 175,000 | $2M | 3.6% | 2026-Q1 |
| Clear Street Group Inc. added | 169,212 | $2M | 3.5% | 2026-Q1 |
| Karpus Management, Inc. trimmed | 170,501 | $2M | 3.5% | 2026-Q1 |
| ADAR1 Capital Management, LLC | 100,000 | $1M | 2.1% | 2026-Q1 |
| L1 Global Manager Pty Ltd | 50,000 | $513K | 1.0% | 2026-Q1 |
| Westchester Capital Management, LLC | 50,000 | $511K | 1.0% | 2026-Q1 |
| RLH Capital LLC new | 40,710 | $417K | 0.8% | 2026-Q1 |
| Quarry LP new | 40,710 | $417K | 0.8% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 40,646 | $415K | 0.8% | 2026-Q1 |
| Dakota Wealth Management | 37,250 | $381K | 0.8% | 2026-Q1 |
| CITADEL ADVISORS LLC | 25,000 | $260K | 0.5% | 2026-Q1 |
| HRT FINANCIAL LP added | 21,968 | $228K | 0.5% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 13,917 | $143K | 0.3% | 2026-Q1 |
| PenderFund Capital Management Ltd. | 11,800 | $121K | 0.2% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 400,000 | $64K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO new | 301,285 | $54K | 0.1% | 2026-Q1 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC added | 301,285 | $54K | 0.1% | 2026-Q1 |
| Hudson Bay Capital Management LP | 275,000 | $50K | 0.1% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC added | 270,848 | $43K | 0.1% | 2026-Q1 |
| Shaolin Capital Management LLC added | 227,000 | $36K | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC | 162,500 | $26K | 0.1% | 2026-Q1 |
| Radcliffe Capital Management, L.P. | 170,000 | $23K | 0.0% | 2026-Q1 |
| AQR Arbitrage LLC | 114,034 | $21K | 0.0% | 2026-Q1 |
| MMCAP International Inc. SPC | 125,000 | $20K | 0.0% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. | 95,000 | $15K | 0.0% | 2026-Q1 |
| TORONTO DOMINION BANK added | 87,276 | $14K | 0.0% | 2026-Q1 |
| Mint Tower Capital Management B.V. | 45,000 | $7K | 0.0% | 2026-Q1 |
| Centiva Capital, LP | 25,000 | $4K | 0.0% | 2026-Q1 |
| MORGAN STANLEY added | 34 | $347 | 0.0% | 2026-Q1 |
| UBS Group AG trimmed | 1 | — | 0.0% | 2026-Q1 |
| CLEAR STREET LLC new | 322,263 | $3M | 6.5% | 2025-Q2 stale |
| Virtu Financial LLC new | 214,842 | $2M | 4.3% | 2025-Q2 stale |
| ATW SPAC MANAGEMENT LLC | 162,500 | $2M | 3.3% | 2025-Q3 stale |
| Decagon Asset Management LLP new | 150,000 | $2M | 3.0% | 2025-Q2 stale |
| StoneX Group Inc. new | 107,500 | $1M | 2.2% | 2025-Q2 stale |
| Bulldog Investors, LLP new | 60,000 | $602K | 1.2% | 2025-Q2 stale |
| MYDA Advisors LLC new | 50,000 | $502K | 1.0% | 2025-Q2 stale |
| Crossingbridge Advisors, LLC new | 48,776 | $490K | 1.0% | 2025-Q2 stale |
| JANE STREET GROUP, LLC new | 12,416 | $125K | 0.3% | 2025-Q2 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. new | 0 | — | 0.0% | 2025-Q2 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.