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 ARCI 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/ARCI"
Use Arkolith to show who owns ARCI, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Magnetar Financial LLC | $11.8M | 1.2M | ▲New +1.2M sh | Q1 2026 | |
| 2 | TENOR CAPITAL MANAGEMENT Co., L.P. | $9.8M | 1.0M | ▲New +1.0M sh | Q1 2026 | |
| 3 | Verition Fund Management LLC | $7.4M | 750K | ▲New +750K sh | Q1 2026 | |
| 4 | Shaolin Capital Management LLC | $5.3M | 540K | ▲New +540K sh | Q1 2026 | |
| 5 | Polar Asset Management Partners Inc. | $4.9M | 500K | ▲New +500K sh | Q1 2026 | |
| 6 | MOORE CAPITAL MANAGEMENT, LP | $4.9M | 500K | ▲New +500K sh | Q1 2026 | |
| 7 | Hudson Bay Capital Management LP | $3.0M | 300K | ▲New +300K sh | Q1 2026 | |
| 8 | HBK INVESTMENTS L P | $2.5M | 250K | ▲New +250K sh | Q1 2026 | |
| 9 | Ghisallo Capital Management LLC | $2.5M | 250K | ▲New +250K sh | Q1 2026 | |
| 10 | Clear Street Group Inc. | $2.4M | 241K | ▲New +241K sh | Q1 2026 | |
| 11 | 683 Capital Management, LLC | $2.0M | 200K | ▲New +200K sh | Q1 2026 | |
| 12 | First Trust Capital Management L.P. | $2.0M | 200K | ▲New +200K sh | Q1 2026 | |
| 13 | StoneX Group Inc. | $1.1M | 110K | ▲New +110K sh | Q1 2026 | |
| 14 | WHITEBOX ADVISORS LLC | $985K | 100K | ▲New +100K sh | Q1 2026 | |
| 15 | Context Capital Management, LLC | $985K | 100K | ▲New +100K sh | Q1 2026 | |
| 16 | Parallax Volatility Advisers, L.P. | $495K | 50K | ▲New +50K 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 |
|---|---|---|---|---|---|
| Jan 26, 2026 | Long Long | Chief Executive Officer, Director, 10% Owner | Buy (P) | 390K | — |
| Jan 26, 2026 | Long Long | Chief Executive Officer, Director, 10% Owner | Buy (P) | 98K | — |
| Jan 26, 2026 | Archimedes Tech SPAC Sponsors III LLC | 10% Owner | Buy (P) | 390K | — |
| Jan 26, 2026 | Archimedes Tech SPAC Sponsors III LLC | 10% Owner | Buy (P) | 98K | — |
| Class | 13F holders | Value held |
|---|---|---|
| ARCIthis pageORD SHS | 28 funds | $119.4M |
| ARCIUUnit | 20 funds | $77.2M |
| G0453R113RT | 19 funds | $1.4M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
| Company | Co-held by | Combined value |
|---|---|---|
| DRUGS MADE IN AMERICA ACQUISDMII | 14 funds | $126.8M |
| IDEA ACQUISITION CORPIACOU | 14 funds | $82.0M |
| CANTOR EQUITY PARTNERS-CL ACEPF | 14 funds | $72.2M |
| M3-BRIGADE ACQUISITION-CL AMBVI | 14 funds | $71.0M |
| M EVO GLOBAL ACQUISITIO-CL AMEVO | 14 funds | $67.3M |
| PROCAP ACQUISITION CORP - APCAP | 14 funds | $37.8M |
| EQV VENTURES ACQUISITION C-AEVAC | 13 funds | $89.2M |
| ALUSSA ENERGY ACQUISIT II-AALUB | 13 funds | $75.2M |
| APEX TREASURY CORP-CL AAPXT | 13 funds | $70.1M |
| HCM IV ACQUISITION CORPHACQU | 13 funds | $69.4M |
| CRANE HARBOR ACQUISITIO-CL ACRAN | 13 funds | $67.7M |
| WEN ACQUISITION CORP-AWENN | 13 funds | $64.9M |
Ranked by how many of ARCI'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 ARCI. 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.