BSAAU · BEST SPAC I Acquisition Corp. · Holdings
Substantial doubt about the company's ability to continue as a going concern.
“The date for liquidation and subsequent dissolution as well as liquidity concerns raise substantial doubt about the Company's ability to continue as a going concern. The unaudited condensed consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty.”View the 10-Q filed Aug 6, 2026
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 3 13F filersWho Holds BSAAU
Last 5 quarters through Jun 30, 2026Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026: 3 filers, like-for-like change -91.4%; actively managed books -91.4%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 91.5% | 1 | -80.0% |
| Bank | 0.8% | 1 | 0.0% |
| Adviser | 0.0% | 0 | — |
| Non-US | 0.0% | 0 | — |
| Broker-dealer | 0.0% | 0 | — |
| Unknown | 7.7% | 1 | -98.9% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Systematic-like | 91.5% | 1 | 0.0% |
| Concentrated | 7.7% | 1 | -98.8% |
| Diversified active | 0.8% | 1 | -99.8% |
| Index-like | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Medium turnover | 0.8% | 1 | -99.8% |
| High turnover | 91.5% | 1 | -46.8% |
| Low turnover | 0.0% | 0 | — |
| Unknown | 7.7% | 1 | -98.8% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 7.7% | 1 | -98.8% |
| Medium horizon | 0.0% | 0 | -100.0% |
| Long horizon | 92.3% | 2 | 0.0% |
| Unknown | 0.0% | 0 | -100.0% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| $1B to $10B | 0.0% | 0 | -100.0% |
| $10B to $100B | 7.7% | 1 | -98.9% |
| $100B or more | 92.3% | 2 | 0.0% |
| Under $1B | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Pooled investment vehicles | 91.5% | 1 | -80.0% |
| Registered funds and BDCs | 0.0% | 0 | — |
| Unknown | 8.5% | 2 | -98.8% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 91.5% | 1 | -80.0% |
| Private funds, type not stated | 0.0% | 0 | — |
| No private funds | 0.0% | 0 | — |
| Unknown | 8.5% | 2 | -98.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 99.2% | 2 | -91.4% |
| Outside the US | 0.8% | 1 | 0.0% |
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Conviction and Crowding
3 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Shared Holders
Companies BSAAU's active holders also own, quarter ended Mar 31, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | SIMA SIM Acquisition Corp. I | 6 |
| 2 | LWAC LightWave Acquisition Corp. | 5 |
| 3 | OBA Oxley Bridge Acquisition Ltd | 4 |
| 4 | NMP NMP Acquisition Corp. | 3 |
| 5 | FSHP Flag Ship Acquisition Corp | 3 |
| 6 | DTSQ DT Cloud Star Acquisition Corp | 3 |
| 7 | BLUW Blue Water Acquisition Corp. III | 3 |
| 8 | PACH Pioneer Acquisition I Corp | 3 |
| 9 | LCCC Lakeshore Acquisition III Corp. | 3 |
| 10 | KFII K&F Growth Acquisition Corp. II | 4 |
Shareholder Targets
13F filers that own its peers but not BSAAU, quarter ended Mar 31, 2026Found through its holder-overlap peers: SIMA, LWAC, OBA, NMP, FSHP, DTSQ, BLUW, PACH, LCCC, KFII, SSAC, LPAA, APAC, BLRK, MACI, SCII, BACC, NPAC, IPEX, HAVA. 81 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Magnetar Financial LLC Registered adviser, Concentrated | $159,598,342 15 held | SIMA, LPAA, NPAC |
| 2 | D. E. Shaw & Co., Inc. Unknown, Systematic-like | $118,799,492 14 held | KFII, BLUW, PACH |
| 3 | LMR Partners LLP Exempt adviser, Systematic-like | $110,391,645 10 held | LPAA, BACC, MACI |
| 4 | Linden Advisors LP Registered adviser, Diversified active | $105,829,241 12 held | SCII, KFII, NPAC |
| 5 | TENOR CAPITAL MANAGEMENT Co., L.P. Registered adviser, Diversified active | $100,961,728 12 held | KFII, NPAC, BACC |
| 6 | PICTON MAHONEY ASSET MANAGEMENT Non-US, Diversified active | $85,269,638 12 held | LPAA, SIMA, KFII |
| 7 | Alberta Investment Management Corp Non-US, Diversified active | $70,116,875 9 held | KFII, NPAC, SIMA |
| 8 | First Trust Capital Management L.P. Registered adviser, Diversified active | $69,848,622 8 held | LPAA, MACI, SIMA |
| 9 | SONA ASSET MANAGEMENT (US) LLC Registered adviser, Diversified active | $63,453,122 15 held | BACC, SCII, HAVA |
| 10 | TWO SIGMA INVESTMENTS, LP Registered adviser, Systematic-like | $62,389,567 14 held | KFII, BLUW, PACH |
Quarterly Activity
New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.
Top Buyers
vs Mar 31, 2026Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Large Clear Street Group Inc. | −167,105 | 2,107 |
Top New Positions
vs Mar 31, 2026Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Large HRT FINANCIAL LP | 21,968 | $0 | |
| Mid ADAR1 Capital Management, LLC | 100,000 | $0 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega CITADEL ADVISORS LLC Registered adviser BSAAU | $300,000 | 91.49% | 25,000 | Shares | 2026-09-02 | |
| Large Clear Street Group Inc. BSAAU | $25,284 | 7.71% | 2,107 | Shares | 2026-08-12 | |
| Mega UBS Group AG Bank BSAAU | $2,604 | 0.79% | 217 | Shares | 2026-08-13 |