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 MACIW 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/MACIW"
Use Arkolith to show who owns MACIW, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BOOTHBAY FUND MANAGEMENT, LLC | $285K | 26K | —Held | Q1 2026 | |
| 2 | LMR Partners LLP | $89K | 743K | —Held | Q1 2026 | |
| 3 | Polar Asset Management Partners Inc. | $89K | 743K | —Held | Q1 2026 | |
| 4 | AQR Arbitrage LLC | $53K | 411K | ▼−1.4% Reduced · −6K sh | Q1 2026 | |
| 5 | CSS LLC/IL | $45K | 376K | —Held | Q1 2026 | |
| 6 | Shaolin Capital Management LLC | $30K | 250K | —Held | Q1 2026 | |
| 7 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | $28K | 213K | —Held | Q1 2026 | |
| 8 | Magnetar Financial LLC | $23K | 186K | —Held | Q1 2026 | |
| 9 | Hudson Bay Capital Management LP | $20K | 163K | —Held | Q1 2026 | |
| 10 | Alberta Investment Management Corp | $20K | 163K | —Held | Q1 2026 | |
| 11 | PICTON MAHONEY ASSET MANAGEMENT | $19K | 162K | —Held | Q1 2026 | |
| 12 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $18K | 150K | —Held | Q1 2026 | |
| 13 | Verition Fund Management LLC | $13K | 99K | —Held | Q1 2026 | |
| 14 | Clear Street Group Inc. | $11K | 95K | —Held | Q1 2026 | |
| 15 | Schonfeld Strategic Advisors LLC | $5K | 40K | ▲+158% Added · +25K sh | Q1 2026 | |
| 16 | MOORE CAPITAL MANAGEMENT, LP | $5K | 38K | —Held | Q1 2026 | |
| 17 | StoneX Group Inc. | $1K | 10K | ▼−10% Reduced · −1K 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.
No Form 4 insider transactions on file yet.
| Company | Co-held by | Combined value |
|---|---|---|
| BTC DEVELOPMENT CORP-CL ABDCI | 17 funds | $64.2M |
| CANTOR EQUITY PARTNERS-CL ACEPF | 16 funds | $71.5M |
| CAL REDWOOD ACQUISIT-CL ACRAQ | 16 funds | $63.5M |
| REPUBLIC DIGITAL ACQUIS-CL ARDAG | 16 funds | $61.4M |
| CANTOR EQUITY PARTNERS-CL ACEPV | 16 funds | $53.2M |
| MOUNTAIN LAKE ACQUISITION COMLACR | 16 funds | $2.5M |
| M3-BRIGADE ACQUISITION VI COMBVIW | 16 funds | $1.6M |
| CAL REDWOOD ACQUISITION CORPCRAQR | 16 funds | $1.6M |
| M3-BRIGADE ACQUISITION-CL AMBVI | 15 funds | $101.8M |
| EQV VENTURES ACQUISITION C-AEVAC | 15 funds | $101.2M |
| K&F GROWTH ACQUISITION COR-AKFII | 15 funds | $98.6M |
| HCM IV ACQUISITION CORPHACQU | 15 funds | $97.2M |
Ranked by how many of MACIW's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
No filings captured for this ticker in the live stream yet.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MACIW. 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.