47 tracked 13F filers disclose a position in OYSE as of the latest SEC 13F filings, a combined $215.4M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Magnetar Financial LLC | $13.2M | 1.3M | —Held | Q1 2026 | |
| 2 | Westchester Capital Management, LLC | $13.2M | 1.3M | —Held | Q1 2026 | |
| 3 | D. E. Shaw & Co., Inc. | $12.8M | 1.3M | —Held | Q1 2026 | |
| 4 | METEORA CAPITAL, LLC | $12.1M | 1.2M | ▼−0.9% Reduced · −11K sh | Q1 2026 | |
| 5 | LINDEN ADVISORS LP | $11.8M | 1.1M | —Held | Q1 2026 | |
| 6 | LMR Partners LLP | $11.2M | 1.1M | —Held | Q1 2026 | |
| 7 | AQR Arbitrage LLC | $11.2M | 1.1M | ▼−3.8% Reduced · −43K sh | Q1 2026 | |
| 8 | PICTON MAHONEY ASSET MANAGEMENT | $10.2M | 1.0M | —Held | Q1 2026 | |
| 9 | TENOR CAPITAL MANAGEMENT Co., L.P. | $9.2M | 900K | —Held | Q1 2026 | |
| 10 | TWO SIGMA INVESTMENTS, LP | $8.1M | 798K | —Held | Q1 2026 | |
| 11 | Hudson Bay Capital Management LP | $7.1M | 697K | —Held | Q1 2026 | |
| 12 | MILLENNIUM MANAGEMENT LLC | $6.8M | 669K | ▲+6.2% Added · +39K sh | Q1 2026 | |
| 13 | Karpus Management, Inc. | $6.7M | 658K | ▼−2.2% Reduced · −15K sh | Q1 2026 | |
| 14 | Radcliffe Capital Management, L.P. | $6.3M | 624K | —Held | Q1 2026 | |
| 15 | MOORE CAPITAL MANAGEMENT, LP | $5.1M | 500K | —Held | Q1 2026 | |
| 16 | BERKLEY W R CORP | $4.8M | 476K | —Held | Q1 2026 | |
| 17 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $4.8M | 475K | ▼−4.5% Reduced · −23K sh | Q1 2026 | |
| 18 | ARISTEIA CAPITAL, L.L.C. | $4.6M | 454K | —Held | Q1 2026 | |
| 19 | MANGROVE PARTNERS IM, LLC | $4.6M | 450K | —Held | Q1 2026 | |
| 20 | Alberta Investment Management Corp | $4.1M | 400K | —Held | Q1 2026 | |
| 21 | DAVIDSON KEMPNER CAPITAL MANAGEMENT LP | $4.1M | 400K | —Held | Q1 2026 | |
| 22 | Polar Asset Management Partners Inc. | $4.1M | 400K | ▼~0% Reduced · −100 sh | Q1 2026 | |
| 23 | COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | $3.6M | 350K | ▼−13% Reduced · −50K sh | Q1 2026 | |
| 24 | GOLDMAN SACHS GROUP INC | $3.5M | 346K | —Held | Q1 2026 | |
| 25 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $3.5M | 340K | —Held | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 1 fund opened a new position in OYSE and 3 added to an existing one, while 6 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| SOULPOWER ACQUISITION CO-ASOUL | 23 funds | $139.6M |
| CANTOR EQUITY PARTNERS-CL ACEPF | 23 funds | $130.8M |
| SIZZLE ACQUISITION CORP-CL ASZZL | 22 funds | $136.2M |
| PIONEER ACQUISITION I-CL APACH | 22 funds | $100.2M |
| BLUE WATER ACQUISITION C-ABLUW | 22 funds | $98.8M |
| AXIOM INTELLIGENCE-CL AAXIN | 22 funds | $84.1M |
| CANTOR EQUITY PARTNERS-CL ACEPV | 22 funds | $78.9M |
| CHENGHE ACQUISITION II-CL ACHEC | 22 funds | $69.3M |
| OYSTER ENTERPRISES II ACQUISOYSER | 22 funds | $1.6M |
| DRUGS MADE IN AMERICA ACQUISDMII | 21 funds | $190.4M |
| K&F GROWTH ACQUISITION COR-AKFII | 21 funds | $157.5M |
| APEX TREASURY CORP-CL AAPXT | 21 funds | $115.2M |
Ranked by how many of OYSE's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 26, 2025 | LightWave Founders LLC | 10% Owner | Buy (P) | 606K | $6.1M |
| May 23, 2025 | Oyster Management II LLC | 10% Owner | Buy (P) | 455K | $4.5M |
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OYSE/capital-change-brief"
Use Arkolith's capital_change_brief for OYSE. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OYSE. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.