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 GRTX 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/GRTX"
Use Arkolith to show who owns GRTX, which funds added or reduced it, and which SEC filings prove each claim.
Not held in any tracked 13F filing yet.
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 |
|---|---|---|---|---|---|
| May 15, 2026 | Emerald Bioventures, LLC | 10% Owner | Conversion (C) | 20.8M | — |
| May 15, 2026 | Emerald Bioventures, LLC | 10% Owner | Conversion (C) | 21K | — |
| Apr 7, 2026 | CHANG NANCY T | Director, 10% Owner | Conversion (C) | 1.2M | — |
| Apr 7, 2026 | CHANG NANCY T | Director, 10% Owner | Conversion (C) | 1K | $0 |
| Apr 7, 2026 | FRIEDMAN MICHAEL R. | Director | Conversion (C) | 5.3M | — |
| Apr 7, 2026 | FRIEDMAN MICHAEL R. | Director | Conversion (C) | 5K | $0 |
| Nov 20, 2025 | Sorensen Mel | President and CEO, Director | Sell (S) | 70K | $1K |
| May 1, 2025 | Sorensen Mel | President and CEO, Director | Grant (A) | 6.0M | $0 |
| May 1, 2025 | Sussman Joel F. | Chief Accounting Officer | Grant (A) | 2.0M | $0 |
| Feb 24, 2025 | Alleva Lawrence M | Director | Grant (A) | 48K | $0 |
| Feb 24, 2025 | CHANG NANCY T | Director, 10% Owner | Grant (A) | 96K | $0 |
| Feb 24, 2025 | FRIEDMAN MICHAEL R. | Director | Grant (A) | 96K | $0 |
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for GRTX. 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.