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 IMSR 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/IMSR"
Use Arkolith to show who owns IMSR, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | EXCHANGE TRADED CONCEPTS, LLC | $12.6M | 2.1M | ▲New +2.1M sh | Q1 2026 | |
| 2 | CITADEL ADVISORS LLC | $7.7M | 1.3M | ▼−37% Reduced · −752K sh | Q1 2026 | |
| 3 | Alyeska Investment Group, L.P. | $4.3M | 722K | —Held | Q1 2026 | |
| 4 | LMR Partners LLP | $4.1M | 691K | ▲+17% Added · +102K sh | Q1 2026 | |
| 5 | WINTON GROUP Ltd | $3.0M | 496K | ▼−23% Reduced · −150K sh | Q1 2026 | |
| 6 | Hudson Bay Capital Management LP | $2.7M | 452K | ▼−39% Reduced · −284K sh | Q1 2026 | |
| 7 | Verition Fund Management LLC | $2.7M | 445K | ▼−41% Reduced · −309K sh | Q1 2026 | |
| 8 | STATE STREET CORP | $2.1M | 346K | ▲+5.8% Added · +19K sh | Q1 2026 | |
| 9 | VANGUARD FIDUCIARY TRUST CO | $1.8M | 300K | ▲New +300K sh | Q1 2026 | |
| 10 | Magnetar Financial LLC | $1.5M | 244K | ▲+881% Added · +219K sh | Q1 2026 | |
| 11 | MOORE CAPITAL MANAGEMENT, LP | $450K | 75K | ▲+50% Added · +25K sh | Q1 2026 | |
| 12 | CastleKnight Management LP | $365K | 61K | —Held | Q1 2026 | |
| 13 | DRW Securities, LLC | $132K | 22K | ▲New +22K sh | Q1 2026 | |
| 14 | Schonfeld Strategic Advisors LLC | $116K | 19K | ▲+8.0% Added · +1K sh | Q1 2026 | |
| 15 | LEVEL FOUR ADVISORY SERVICES, LLC | $98K | 16K | ▲New +16K sh | Q1 2026 | |
| 16 | TUDOR INVESTMENT CORP ET AL | $68K | 11K | ▲Added Added · +11K sh | Q1 2026 | |
| 17 | WealthPlan Investment Management, LLC | $61K | 10K | ▲New +10K sh | Q1 2026 | |
| 18 | FIRST FOUNDATION ADVISORS | $60K | 10K | ▲New +10K sh | Q1 2026 | |
| 19 | Federation des caisses Desjardins du Quebec | $32K | 5K | ▲+23% Added · +1K sh | Q1 2026 | |
| 20 | Steward Partners Investment Advisory, LLC | $1K | 200 | —Held | Q1 2026 | |
| 21 | Root Financial Partners, LLC | $300 | 50 | —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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Dec 18, 2025 | JOHNSON WILLIAM D | Director | Grant (A) | 1K | $0 |
| Dec 18, 2025 | MacDiarmid John Hugh | Director | Grant (A) | 1K | $0 |
| Dec 18, 2025 | MacDiarmid John Hugh | Director | Grant (A) | 6K | $0 |
| Dec 18, 2025 | Pardee Charles G | Director | Grant (A) | 882 | $0 |
| Dec 18, 2025 | Pardee Charles G | Director | Grant (A) | 5K | $0 |
| Dec 18, 2025 | Hill David John | Director | Grant (A) | 3K | $0 |
| Dec 18, 2025 | Hill David John | Director | Grant (A) | 588 | $0 |
| Dec 18, 2025 | Jones Robert Wood | Director | Grant (A) | 6K | $0 |
| Dec 18, 2025 | Jones Robert Wood | Director | Grant (A) | 1K | $0 |
| Dec 18, 2025 | BUCKMAN FREDERICK W | Director | Grant (A) | 7K | $0 |
| Dec 18, 2025 | BUCKMAN FREDERICK W | Director | Grant (A) | 1K | $0 |
| Dec 18, 2025 | Matthews Shawn | Director | Grant (A) | 735 | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| COREWEAVE INC-CL ACRWV | 1 funds | $527.9M |
| WEBULL CORPBULL | 1 funds | $144.5M |
| SPDR GOLD SHARESGLD | 1 funds | $134.4M |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 1 funds | $132.6M |
| ETORO GROUP LTD-AETOR | 1 funds | $102.1M |
| ISHARES SILVER TRUSTSLV | 1 funds | $76.1M |
| MICRON TECHNOLOGY INCMU | 1 funds | $61.7M |
| META PLATFORMS INC-CLASS AMETA | 1 funds | $50.6M |
| NVIDIA CORPNVDA | 1 funds | $50.5M |
| TESLA INCTSLA | 1 funds | $44.7M |
| ISHARES 20+ YEAR TREASURY BDTLT | 1 funds | $42.6M |
| CHEVRON CORPCVX | 1 funds | $38.4M |
Ranked by how many of IMSR'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 IMSR. 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.