The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query OYSE owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OYSE"
Use Arkolith to show who owns OYSE, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Westchester Capital Management, LLC | $13.2M | 1.3M | —Held | Q1 2026 | |
| 2 | Magnetar Financial LLC | $13.2M | 1.3M | —Held | Q1 2026 | |
| 3 | AQR Arbitrage LLC | $11.2M | 1.1M | ▼−3.8% Reduced · −43K sh | Q1 2026 | |
| 4 | LMR Partners LLP | $11.2M | 1.1M | —Held | Q1 2026 | |
| 5 | PICTON MAHONEY ASSET MANAGEMENT | $10.2M | 1.0M | —Held | Q1 2026 | |
| 6 | TENOR CAPITAL MANAGEMENT Co., L.P. | $9.2M | 900K | —Held | Q1 2026 | |
| 7 | Hudson Bay Capital Management LP | $7.1M | 697K | —Held | Q1 2026 | |
| 8 | Karpus Management, Inc. | $6.7M | 658K | ▼−2.2% Reduced · −15K sh | Q1 2026 | |
| 9 | MOORE CAPITAL MANAGEMENT, LP | $5.1M | 500K | —Held | Q1 2026 | |
| 10 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $4.8M | 475K | ▼−4.5% Reduced · −23K sh | Q1 2026 | |
| 11 | ARISTEIA CAPITAL, L.L.C. | $4.6M | 454K | —Held | Q1 2026 | |
| 12 | MANGROVE PARTNERS IM, LLC | $4.6M | 450K | —Held | Q1 2026 | |
| 13 | Alberta Investment Management Corp | $4.1M | 400K | —Held | Q1 2026 | |
| 14 | DAVIDSON KEMPNER CAPITAL MANAGEMENT LP | $4.1M | 400K | —Held | Q1 2026 | |
| 15 | Polar Asset Management Partners Inc. | $4.1M | 400K | ▼~0% Reduced · −100 sh | Q1 2026 | |
| 16 | Verition Fund Management LLC | $3.1M | 302K | ▼−29% Reduced · −121K sh | Q1 2026 | |
| 17 | Context Capital Management, LLC | $2.6M | 251K | —Held | Q1 2026 | |
| 18 | WHITEBOX ADVISORS LLC | $2.5M | 250K | —Held | Q1 2026 | |
| 19 | Shaolin Capital Management LLC | $2.5M | 250K | ▲+25% Added · +50K sh | Q1 2026 | |
| 20 | Schonfeld Strategic Advisors LLC | $2.1M | 207K | ▲+0.4% Added · +812 sh | Q1 2026 | |
| 21 | Clear Street Group Inc. | $2.0M | 199K | ▼−0.3% Reduced · −513 sh | Q1 2026 | |
| 22 | First Trust Capital Management L.P. | $1.5M | 150K | —Held | Q1 2026 | |
| 23 | Walleye Capital LLC | $767K | 75K | —Held | Q1 2026 | |
| 24 | 683 Capital Management, LLC | $763K | 75K | —Held | Q1 2026 | |
| 25 | Parallax Volatility Advisers, L.P. | $706K | 69K | ▲New +69K sh | 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 26, 2025 | LightWave Founders LLC | 10% Owner | Buy (P) | 606K | $6.1M |
| Jun 26, 2025 | LightWave Founders LLC | 10% Owner | Buy (P) | 606K | — |
| May 23, 2025 | Oyster Management II LLC | 10% Owner | Buy (P) | 455K | $4.5M |
| May 23, 2025 | Oyster Management II LLC | 10% Owner | Buy (P) | 455K | — |
| 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. Via the MCP server (ticker.co_held).
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. Every panel above is one call to the Arkolith API & MCP server.