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 MRT 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/MRT"
Use Arkolith to show who owns MRT, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Weiss Asset Management LP | $255K | 127K | ▼−44% Reduced · −101K sh | Q1 2026 | |
| 2 | Curi Capital, LLC | $70K | 35K | —Held | Q1 2026 | |
| 3 | STATE STREET CORP | $67K | 34K | ▼−6.4% Reduced · −2K sh | Q1 2026 | |
| 4 | CITADEL ADVISORS LLC | $23K | 11K | ▼−35% Reduced · −6K 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 |
|---|---|---|
| NVIDIA CORPNVDA | 3 funds | $4.4B |
| MICRON TECHNOLOGY INCMU | 3 funds | $1.6B |
| APPLE INCAAPL | 3 funds | $1.5B |
| TESLA INCTSLA | 3 funds | $843.1M |
| JPMORGAN CHASE & COJPM | 3 funds | $837.6M |
| INTUITIVE SURGICAL INCISRG | 3 funds | $633.4M |
| CITIGROUP INCC | 3 funds | $524.2M |
| LOCKHEED MARTIN CORPLMT | 3 funds | $494.6M |
| APPLIED MATERIALS INCAMAT | 3 funds | $477.6M |
| ELEVANCE HEALTH INCELV | 3 funds | $473.2M |
| YUM! BRANDS INCYUM | 3 funds | $445.6M |
| SANDISK CORPSNDK | 3 funds | $391.0M |
Ranked by how many of MRT'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 MRT. 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.