OYSER · Oyster Enterprises II Acquisition Corp · Holdings
Substantial doubt about the company's ability to continue as a going concern.
“Such potential liquidity shortfall and mandatory liquidation condition raise substantial doubt about the Company’s ability to continue as a going concern.”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 1 13F filers · Δ vs Jun 30, 2026Who Holds OYSER
Last 5 quarters through Sep 30, 2026 (filing window open)Each 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, the newest closed quarter: 46 filers, like-for-like change +2.3%; actively managed books +2.3%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 66.2% | 31 | +1.9% |
| Exempt adviser | 6.2% | 2 | 0.0% |
| Adviser | 9.4% | 1 | -7.7% |
| Bank | 2.3% | 1 | +29.1% |
| Non-US | 8.8% | 4 | 0.0% |
| Insurer | 0.0% | 0 | -100.0% |
| Unknown | 7.2% | 7 | +47.1% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Systematic-like | 7.0% | 3 | +1.7% |
| Concentrated | 11.1% | 5 | +5.1% |
| Diversified active | 81.9% | 38 | +2.0% |
| Index-like | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 3.2% | 3 | +262.5% |
| Medium turnover | 48.7% | 20 | -1.0% |
| High turnover | 47.0% | 22 | +1.0% |
| Unknown | 1.2% | 1 | -0.8% |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 49.6% | 18 | +3.8% |
| Medium horizon | 16.1% | 6 | 0.0% |
| Long horizon | 14.5% | 8 | +15.1% |
| Unknown | 19.9% | 14 | -6.8% |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 20.0% | 14 | +2.6% |
| $1B to $10B | 44.9% | 16 | -0.3% |
| $10B to $100B | 30.6% | 14 | +6.6% |
| $100B or more | 4.5% | 2 | 0.0% |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Pooled investment vehicles | 57.3% | 25 | +1.2% |
| Registered funds and BDCs | 8.7% | 5 | +6.5% |
| Charitable organizations | 0.2% | 1 | 0.0% |
| Unknown | 33.8% | 15 | +3.1% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 59.0% | 27 | -2.1% |
| Other private funds | 3.4% | 3 | +287.6% |
| Private funds, type not stated | 4.8% | 1 | 0.0% |
| No private funds | 5.1% | 2 | -0.1% |
| Private equity funds | 0.0% | 0 | — |
| Unknown | 27.6% | 13 | +3.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 79.5% | 36 | +1.4% |
| Outside the US | 20.5% | 10 | +6.1% |
The Sep 30, 2026 filing window is still open, so its bar shows only the filers that have filed so far.
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
46 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).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 84.0% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies OYSER's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | ALDF Aldel Financial II Inc. | 12 |
| 2 | CRAQ Cal Redwood Acquisition Corp. | 12 |
| 3 | TVAI Thayer Ventures Acquisition Corp II | 11 |
| 4 | COPL Copley Acquisition Corp | 10 |
| 5 | ZKP Lafayette Digital Acquisition Corp. I | 10 |
| 6 | JACS Jackson Acquisition Co II | 11 |
| 7 | LWAC LightWave Acquisition Corp. | 11 |
| 8 | KFII K&F Growth Acquisition Corp. II | 12 |
| 9 | POLE Andretti Acquisition Corp. II | 11 |
| 10 | SVCC Stellar V Capital Corp. (Cayman Islands) | 8 |
Shareholder Targets
13F filers that own its peers but not OYSER, quarter ended Jun 30, 2026Found through its holder-overlap peers: ALDF, CRAQ, TVAI, COPL, ZKP, JACS, LWAC, KFII, POLE, SVCC, CCAQ, LPBB, EVAC, RIBB, GIX, CRAN, SPEG, GIW, ARCI, TACH. 58 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active | $61,162,972 3 held | CRAN, ARCI, EVAC |
| 2 | Yakira Capital Management, Inc. Registered adviser, Diversified active | $39,347,036 6 held | GIX, GIW, LPBB |
| 3 | Wealthspring Capital LLC Registered adviser, Diversified active | $38,495,321 10 held | ALDF, TACH, CRAQ |
| 4 | Crossingbridge Advisors, LLC Adviser, Diversified active | $33,154,441 7 held | TACH, POLE, JACS |
| 5 | Fort Baker Capital Management LP Registered adviser, Diversified active | $31,768,688 3 held | CRAN, EVAC, ALDF |
| 6 | Centiva Capital, LP Registered adviser, Diversified active | $27,958,425 14 held | TACH, CRAN, TVAI |
| 7 | Ghisallo Capital Management LLC Registered adviser, Diversified active | $27,902,500 5 held | TACH, ALDF, LWAC |
| 8 | Governors Lane LP Registered adviser, Diversified active | $25,539,871 4 held | ARCI, CRAN, LWAC |
| 9 | Lineage Point Capital LP Adviser, Diversified active | $19,128,950 13 held | CRAN, TACH, ARCI |
| 10 | Kryger Capital LLC Registered adviser, Concentrated | $18,618,462 2 held | ZKP, CRAN |
Fund Ownership of OYSER by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 0 shares.
| Fund type | Shares |
|---|---|
| Index funds | 0 |
| Index ETFs | 0 |
| Active ETFs | 2,372 |
| Active funds | 200,000 |
| Unclassified | 0 |
| All registered funds | 202,372 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
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.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Micro GRITSTONE ASSET MANAGEMENT LLC Registered adviser OYSER | $4,349 | 100.00% | 49,430 | Shares | 2026-10-26 |