Who owns Oyster Enterprises II Acquisition (OYSE)
Which tracked institutional funds hold OYSE, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OYSE company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-14). 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
4 tracked funds added or opened OYSE while 9 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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
OYSE’s largest tracked holder by dollar value, METEORA CAPITAL, LLC, sizes it at 2.9% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 2.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in OYSE 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 2026-Q1 and 2026-Q2, across 66 tracked filers holding OYSE, 9 increased or opened the position and 15 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 OYSE between the 2026-Q1 and 2026-Q2 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 1
- Limestone Investment Advisors LP$515K
Full exits 6
- METEORA CAPITAL, LLC$359M
- Harraden Circle Investments, LLC$147M
- TENOR CAPITAL MANAGEMENT Co., L.P.$122M
- Decagon Asset Management LLP$23M
- GLAZER CAPITAL, LLC$16M
- Mint Tower Capital Management B.V.$2M
Largest adds
- Karpus Management, Inc.$2M
- Schonfeld Strategic Advisors LLC$302K
- PICTON MAHONEY ASSET MANAGEMENT$262K
Largest trims
- Context Capital Management, LLC$43M
- Walleye Capital LLC$768K
- Shaolin Capital Management LLC$389K
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 |
|---|---|---|---|---|
| Magnetar Financial LLC | 1,300,000 | $13M | 1.5% | 2026-Q2 |
| Westchester Capital Management, LLC | 1,295,112 | $13M | 1.5% | 2026-Q2 |
| D. E. Shaw & Co., Inc. | 1,252,350 | $13M | 1.5% | 2026-Q2 |
| Linden Advisors LP | 1,150,000 | $12M | 1.4% | 2026-Q2 |
| AQR Arbitrage LLC added | 1,100,584 | $11M | 1.3% | 2026-Q2 |
| LMR Partners LLP | 1,100,000 | $11M | 1.3% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT added | 1,015,000 | $10M | 1.2% | 2026-Q2 |
| Karpus Management, Inc. added | 803,996 | $8M | 0.9% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 797,500 | $8M | 0.9% | 2026-Q2 |
| Hudson Bay Capital Management LP | 696,530 | $7M | 0.8% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 669,000 | $7M | 0.8% | 2026-Q2 |
| Radcliffe Capital Management, L.P. added | 623,742 | $6M | 0.7% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP | 500,000 | $5M | 0.6% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 475,000 | $5M | 0.6% | 2026-Q2 |
| BERKLEY W R CORP | 475,872 | $5M | 0.6% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. | 454,000 | $5M | 0.5% | 2026-Q2 |
| MANGROVE PARTNERS IM, LLC | 450,000 | $5M | 0.5% | 2026-Q2 |
| Alberta Investment Management Corp | 400,000 | $4M | 0.5% | 2026-Q2 |
| Davidson Kempner Capital Management LP | 400,000 | $4M | 0.5% | 2026-Q2 |
| Polar Asset Management Partners Inc. trimmed | 399,800 | $4M | 0.5% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 350,000 | $4M | 0.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC | 346,312 | $4M | 0.4% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 340,000 | $4M | 0.4% | 2026-Q2 |
| Bulldog Investors, LLP trimmed | 320,436 | $3M | 0.4% | 2026-Q2 |
| Verition Fund Management LLC trimmed | 292,103 | $3M | 0.3% | 2026-Q2 |
| TORONTO DOMINION BANK | 277,000 | $3M | 0.3% | 2026-Q2 |
| Context Capital Management, LLC | 250,782 | $3M | 0.3% | 2026-Q2 |
| GABELLI & Co INVESTMENT ADVISERS, INC. | 250,700 | $3M | 0.3% | 2026-Q2 |
| WHITEBOX ADVISORS LLC | 250,000 | $3M | 0.3% | 2026-Q2 |
| Periscope Capital Inc. | 244,345 | $3M | 0.3% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 235,091 | $2M | 0.3% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC trimmed | 214,698 | $2M | 0.3% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 210,002 | $2M | 0.2% | 2026-Q2 |
| MMCAP International Inc. SPC | 200,000 | $2M | 0.2% | 2026-Q2 |
| MYDA Advisors LLC | 199,000 | $2M | 0.2% | 2026-Q2 |
| Clear Street Group Inc. trimmed | 178,908 | $2M | 0.2% | 2026-Q2 |
| GABELLI FUNDS LLC trimmed | 174,300 | $2M | 0.2% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC | 173,344 | $2M | 0.2% | 2026-Q2 |
| First Trust Capital Management L.P. | 150,000 | $2M | 0.2% | 2026-Q2 |
| Calamos Advisors LLC | 123,093 | $1M | 0.1% | 2026-Q2 |
| O'Connor Alternative Investments LLC | 100,000 | $1M | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO | 100,000 | $1M | 0.1% | 2026-Q2 |
| DLD Asset Management, LP | 100,038 | $1M | 0.1% | 2026-Q2 |
| L1 Global Manager Pty Ltd | 100,000 | $1M | 0.1% | 2026-Q2 |
| Parallax Volatility Advisers, L.P. added | 90,616 | $934K | 0.1% | 2026-Q2 |
| 683 Capital Management, LLC | 75,000 | $772K | 0.1% | 2026-Q2 |
| OMERS ADMINISTRATION Corp | 61,050 | $671K | 0.1% | 2026-Q2 |
| HEIGHTS CAPITAL MANAGEMENT, INC | 50,000 | $516K | 0.1% | 2026-Q2 |
| Limestone Investment Advisors LP new | 50,094 | $515K | 0.1% | 2026-Q2 |
| DELTEC ASSET MANAGEMENT LLC | 50,000 | $514K | 0.1% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP | 49,470 | $510K | 0.1% | 2026-Q2 |
| GRITSTONE ASSET MANAGEMENT LLC | 49,429 | $509K | 0.1% | 2026-Q2 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC added | 47,911 | $492K | 0.1% | 2026-Q2 |
| Dakota Wealth Management | 40,900 | $421K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 39,898 | $411K | 0.0% | 2026-Q2 |
| ABC ARBITRAGE SA | 25,000 | $257K | 0.0% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 20,834 | $215K | 0.0% | 2026-Q2 |
| MIZUHO SECURITIES USA LLC | 16,690 | $169K | 0.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC | 14,458 | $149K | 0.0% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 13,259 | $137K | 0.0% | 2026-Q2 |
| Warberg Asset Management LLC | 10,000 | $103K | 0.0% | 2026-Q2 |
| CSS LLC/IL | 66,340 | $73K | 0.0% | 2026-Q2 |
| Alpine Global Management, LLC | 245,295 | $27K | 0.0% | 2026-Q2 |
| UBS Group AG | 2,241 | $23K | 0.0% | 2026-Q2 |
| Walleye Capital LLC | 75,000 | $8K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 43 | $442 | 0.0% | 2026-Q2 |
| METEORA CAPITAL, LLC added | 2,311,790 | $347M | 39.6% | 2026-Q1 stale (1 quarter behind) |
| Harraden Circle Investments, LLC added | 1,178,826 | $147M | 16.8% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 900,000 | $112M | 12.9% | 2026-Q1 stale (1 quarter behind) |
| Decagon Asset Management LLP | 183,091 | $23M | 2.6% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC added | 1,550,000 | $16M | 1.8% | 2026-Q1 stale (1 quarter behind) |
| Mint Tower Capital Management B.V. | 150,000 | $2M | 0.2% | 2026-Q1 stale (1 quarter behind) |
| Alyeska Investment Group, L.P. | 25,000 | $261K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Virtu Financial LLC trimmed | 10,979 | $111K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| CITIGROUP INC | 3,900 | $39K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| BANK OF AMERICA CORP /DE/ | 100 | $20 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Tuttle Capital Management, LLC | 10,000 | $102K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Centiva Capital, LP new | 400,000 | $4M | 0.5% | 2025-Q2 stale (4 quarters behind) |
| CLEAR STREET LLC new | 310,044 | $3M | 0.4% | 2025-Q2 stale (4 quarters behind) |
| K2 PRINCIPAL FUND, L.P. new | 100,000 | $1M | 0.1% | 2025-Q2 stale (4 quarters behind) |
| Wealthspring Capital LLC new | 75,000 | $759K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| PRELUDE CAPITAL MANAGEMENT, LLC new | 20,000 | $202K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. new | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
1 parent filing withheld from the table above, and from the coverage figures, to avoid listing one book twice: OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) (last filed 2025-Q4, 100,000 shares) reconciles to its 1 current affiliate (100,000 shares) — 0.000% apart.
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.