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 GMTX 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/GMTX"
Use Arkolith to show who owns GMTX, 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 |
|---|---|---|---|---|---|
| Oct 26, 2022 | Leonard Braden Michael | 10% Owner | Sell (S) | 23K | $47K |
| May 31, 2022 | Piekos Brian | CFO | Grant (A) | 10K | $11K |
| Apr 13, 2022 | Leonard Braden Michael | 10% Owner | Buy (P) | 192K | $291K |
| Apr 12, 2022 | Leonard Braden Michael | 10% Owner | Buy (P) | 204K | $289K |
| Apr 12, 2022 | Leonard Braden Michael | 10% Owner | Buy (P) | 55K | $75K |
| Apr 11, 2022 | Leonard Braden Michael | 10% Owner | Buy (P) | 504K | $681K |
| Jan 13, 2022 | Piekos Brian | CFO | Grant (A) | 281K | $0 |
| Jan 3, 2022 | GEMAYEL GEORGES | Executive Chair of the Board, Director | Grant (A) | 793K | $0 |
| Jan 3, 2022 | Meyenburg Jason Patrick | Chief Executive Officer, Director | Grant (A) | 124K | $0 |
| Nov 15, 2021 | GEMAYEL GEORGES | See Remarks, Director | Grant (A) | 17K | $0 |
| Nov 15, 2021 | GEMAYEL GEORGES | See Remarks, Director | Grant (A) | 24K | $0 |
| Oct 18, 2021 | Piekos Brian | Chief Financial Officer | Grant (A) | 91K | $0 |
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for GMTX. 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.