Oyster Enterprises II Acquisition Corp

OYSEU

Exchange: Nasdaq
Industry: Blank Checks
SEC CIK: 0002042182

SEC filings (opens in a new tab)

No open-market purchases or sales by Oyster Enterprises II Acquisition Corp insiders were filed in the last 90 days; 8 institutions reported holding it in 13F filings for Q2 2026, worth $4.04M in total; no superinvestor holds it.

Other share classesOYSE OYSER

13F holders, Q3 2025

Institutional positions in Oyster Enterprises II Acquisition Corp as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders: 15; −45 vs. Q2 2025
Shares held: 2.60M; −21.2M (−89.1%) vs. Q2 2025
Total value: $26.3M; −$214.6M (−89.1%) vs. Q2 2025
New holders: 3; 0 more added
Sold out: 48; 6 more reduced

1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting OYSEU on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ3 2025: 15 institutions

Value heldQ3 2025: $26.3M

Institutions holding OYSEU and their total value by quarter
Quarter	Holders	Value
Q2 2026	8	$4.04M
Q1 2026	8	$5.16M
Q4 2025	8	$5.21M
Q3 2025	15	$26.3M
Q2 2025	61	$244.1M
Q1 2025	0	$0
Q4 2024	0	$0
Q3 2024	0	$0
Q2 2024	0	$0
Q1 2024	0	$0
Q4 2023	0	$0
Q3 2023	0	$0
Q2 2023	0	$0
Q1 2023	0	$0
Q4 2022	0	$0
Q3 2022	0	$0
Q2 2022	0	$0
Q1 2022	0	$0
Q4 2021	0	$0
Q3 2021	0	$0
Q2 2021	0	$0
Q1 2021	0	$0

Institutions, Q3 2025

Shares, value and share of portfolio for each institution holding Oyster Enterprises II Acquisition Corp; share changes are against Q2 2025.

Institutions holding OYSEU in Q3 2025
Institution	Shares	Value	% of portfolio	Change in shares	Action
Westchester Capital Management, LLC	850,000	$8.50M	0.44%	00.0%	Unchanged
Alberta Investment Management Corp	400,000	$4.10M	0.03%	00.0%	Unchanged
MYDA Advisors LLC	350,000	$3.59M	1.08%	−25,000−6.7%	Reduced
Millennium Management LLC	300,986	$3.07M	0.00%	−524,164−63.5%	Reduced
Calamos Advisors LLC	123,093	$1.26M	0.01%	00.0%	Unchanged
Bulldog Investors, LLP	120,199	$1.20M	0.28%	−121,593−50.3%	Reduced
JPMorgan Chase & Co	100,000	$1.02M	0.00%	00.0%	Unchanged
Rivernorth Capital Management, LLC	102,372	$1.02M	0.06%	−397,628−79.5%	Reduced
Walleye Capital LLC	75,000	$768.8K	0.01%	00.0%	Unchanged
Omers Administration Corp	59,827	$613.2K	0.00%	+59,827	New
Readystate Asset Management LP	49,470	$507.1K	0.02%	−530−1.1%	Reduced
Clear Street Group Inc.	39,610	$404.0K	0.00%	+39,610	New
Citadel Advisors LLC	13,219	$135.5K	0.00%	+13,219	New
Tuttle Tactical Management	10,000	$102.0K	0.39%	00.0%	Unchanged
UBS Group AG	2,431	$24.3K	0.00%	−710−22.6%	Reduced
Meteora Capital, LLC	0	$0	0.00%	−1,539,645−100.0%	Sold out
Glazer Capital, LLC	0	$0	0.00%	−1,499,883−100.0%	Sold out
CNH Partners LLC	0	$0	0.00%	−1,495,000−100.0%	Sold out
Magnetar Financial LLC	0	$0	0.00%	−1,300,000−100.0%	Sold out
LMR Partners LLP	0	$0	0.00%	−1,100,000−100.0%	Sold out
Linden Advisors LP	0	$0	0.00%	−1,000,000−100.0%	Sold out
Picton Mahoney Asset Management	0	$0	0.00%	−1,000,000−100.0%	Sold out
Tenor Capital Management Co., L.P.	0	$0	0.00%	−900,000−100.0%	Sold out
Two Sigma Investments, LP	0	$0	0.00%	−797,500−100.0%	Sold out
Verition Fund Management LLC	0	$0	0.00%	−750,000−100.0%	Sold out
Hudson Bay Capital Management LP	0	$0	0.00%	−696,630−100.0%	Sold out
Radcliffe Capital Management, L.P.	0	$0	0.00%	−551,079−100.0%	Sold out
Moore Capital Management, LP	0	$0	0.00%	−500,000−100.0%	Sold out
Berkley W R Corp	0	$0	0.00%	−475,872−100.0%	Sold out
Aristeia Capital LLC	0	$0	0.00%	−454,000−100.0%	Sold out
Mangrove Partners	0	$0	0.00%	−450,000−100.0%	Sold out
Healthcare of Ontario Pension Plan Trust Fund	0	$0	0.00%	−450,000−100.0%	Sold out
Polar Asset Management Partners Inc.	0	$0	0.00%	−400,000−100.0%	Sold out
Davidson Kempner Capital Management LP	0	$0	0.00%	−400,000−100.0%	Sold out
Centiva Capital, LP	0	$0	0.00%	−400,000−100.0%	Sold out
Virtu Financial LLC	0	$0	0.00%	−328,141−100.0%	Sold out
Schonfeld Strategic Advisors LLC	0	$0	0.00%	−300,000−100.0%	Sold out
Shaolin Capital Management LLC	0	$0	0.00%	−300,000−100.0%	Sold out
Context Capital Management, LLC	0	$0	0.00%	−250,782−100.0%	Sold out
Gabelli & Co Investment Advisers, Inc.	0	$0	0.00%	−250,700−100.0%	Sold out
Toronto Dominion Bank	0	$0	0.00%	−250,000−100.0%	Sold out
Whitebox Advisors LLC	0	$0	0.00%	−250,000−100.0%	Sold out
Mizuho Securities USA LLC	0	$0	0.00%	−239,770−100.0%	Sold out
Periscope Capital Inc.	0	$0	0.00%	−203,000−100.0%	Sold out
MMCAP International Inc. SPC	0	$0	0.00%	−200,000−100.0%	Sold out
DLD Asset Management, LP	0	$0	0.00%	−200,000−100.0%	Sold out
Gabelli Funds LLC	0	$0	0.00%	−199,300−100.0%	Sold out
Decagon Asset Management LLP	0	$0	0.00%	−180,558−100.0%	Sold out
Vivaldi Asset Management, LLC	0	$0	0.00%	−150,000−100.0%	Sold out
Mint Tower Capital Management B.V.	0	$0	0.00%	−150,000−100.0%	Sold out
UBS Oconnor LLC	0	$0	0.00%	−100,000−100.0%	Sold out
K2 Principal Fund, L.P.	0	$0	0.00%	−100,000−100.0%	Sold out
683 Capital Management, LLC	0	$0	0.00%	−75,000−100.0%	Sold out
Wealthspring Capital LLC	0	$0	0.00%	−75,000−100.0%	Sold out
CSS LLC	0	$0	0.00%	−60,000−100.0%	Sold out
Heights Capital Management, Inc	0	$0	0.00%	−50,000−100.0%	Sold out
Deltec Asset Management LLC	0	$0	0.00%	−50,000−100.0%	Sold out
Gritstone Asset Management LLC	0	$0	0.00%	−50,000−100.0%	Sold out
Wolverine Asset Management LLC	0	$0	0.00%	−32,574−100.0%	Sold out
Parallax Volatility Advisers, L.P.	0	$0	0.00%	−25,000−100.0%	Sold out
Prelude Capital Management, LLC	0	$0	0.00%	−20,000−100.0%	Sold out
Warberg Asset Management LLC	0	$0	0.00%	−10,000−100.0%	Sold out
Highbridge Capital Management LLC	0	$0	0.00%	−1,000−100.0%	Sold out
Clear Street LLC	–	–	–	–	Not filed