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 TUSK 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/TUSK"
Use Arkolith to show who owns TUSK, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $11.2M | 4.6M | —Held | Q1 2026 | |
| 2 | BlackRock, Inc. | $3.6M | 1.5M | ▼−1.2% Reduced · −18K sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $2.0M | 819K | ▲New +819K sh | Q1 2026 | |
| 4 | VANGUARD GROUP INC | $1.9M | 1.0M | ▲+8.1% Added · +77K sh | Q4 2025 | |
| 5 | DIMENSIONAL FUND ADVISORS LP | $1.7M | 686K | ▼−1.9% Reduced · −13K sh | Q1 2026 | |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $1.5M | 611K | ▲+4.3% Added · +25K sh | Q1 2026 | |
| 7 | STATE STREET CORP | $1.0M | 422K | ▲+3.3% Added · +13K sh | Q1 2026 | |
| 8 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $814K | 332K | ▼−19% Reduced · −78K sh | Q1 2026 | |
| 9 | CITADEL ADVISORS LLC | $812K | 331K | ▲+51% Added · +111K sh | Q1 2026 | |
| 10 | Empowered Funds, LLC | $591K | 241K | ▲+10% Added · +22K sh | Q1 2026 | |
| 11 | RENAISSANCE TECHNOLOGIES LLC | $568K | 232K | ▲+25% Added · +46K sh | Q1 2026 | |
| 12 | GOLDMAN SACHS GROUP INC | $548K | 223K | ▲+148% Added · +134K sh | Q1 2026 | |
| 13 | NORTHERN TRUST CORP | $458K | 187K | ▲+11% Added · +19K sh | Q1 2026 | |
| 14 | VANGUARD FIDUCIARY TRUST CO | $417K | 170K | ▲New +170K sh | Q1 2026 | |
| 15 | LOS ANGELES CAPITAL MANAGEMENT LLC | $400K | 163K | ▲New +163K sh | Q1 2026 | |
| 16 | Boston Partners | $378K | 154K | ▲New +154K sh | Q1 2026 | |
| 17 | MORGAN STANLEY | $374K | 153K | ▼−48% Reduced · −140K sh | Q1 2026 | |
| 18 | VANGUARD PORTFOLIO MANAGEMENT LLC | $343K | 140K | ▲New +140K sh | Q1 2026 | |
| 19 | Bank of New York Mellon Corp | $325K | 133K | ▼−0.1% Reduced · −135 sh | Q1 2026 | |
| 20 | Centiva Capital, LP | $272K | 111K | ▲+169% Added · +70K sh | Q1 2026 | |
| 21 | STIFEL FINANCIAL CORP | $259K | 106K | —Held | Q1 2026 | |
| 22 | OSAIC HOLDINGS, INC. | $177K | 72K | ▼−9.1% Reduced · −7K sh | Q1 2026 | |
| 23 | Russell Investments Group, Ltd. | $167K | 68K | ▼−73% Reduced · −179K sh | Q1 2026 | |
| 24 | AQR CAPITAL MANAGEMENT LLC | $163K | 67K | ▲+493% Added · +55K sh | Q1 2026 | |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $144K | 59K | ▼−17% Reduced · −12K 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 |
|---|---|---|---|---|---|
| Dec 11, 2025 | Amron Arthur H | Director | Buy (P) | 10K | $19K |
| May 22, 2025 | SMITH ARTHUR L | Director | Sell (S) | 20K | $50K |
| May 20, 2025 | SMITH ARTHUR L | Director | Sell (S) | 50K | $126K |
| May 19, 2025 | SMITH ARTHUR L | Director | Sell (S) | 15K | $37K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 20 funds | $5.2B |
| ALPHABET INC-CL CGOOG | 20 funds | $2.8B |
| ELI LILLY & COLLY | 20 funds | $1.8B |
| COSTCO WHOLESALE CORPCOST | 20 funds | $1.4B |
| VISA INC-CLASS A SHARESV | 20 funds | $1.3B |
| LAM RESEARCH CORPLRCX | 20 funds | $971.2M |
| PALANTIR TECHNOLOGIES INC-APLTR | 20 funds | $936.2M |
| ORACLE CORPORCL | 20 funds | $915.3M |
| NETFLIX INCNFLX | 20 funds | $786.9M |
| UNITED AIRLINES HOLDINGS INCUAL | 20 funds | $677.5M |
| CARDINAL HEALTH INCCAH | 20 funds | $650.6M |
| BRISTOL-MYERS SQUIBB COBMY | 20 funds | $631.5M |
Ranked by how many of TUSK'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 TUSK. 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.