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 PTRA 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/PTRA"
Use Arkolith to show who owns PTRA, 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 |
|---|---|---|---|---|---|
| Jun 25, 2023 | Embt Jeffrey Donald | Chief Accounting Officer | Grant (A) | 210K | $0 |
| May 26, 2023 | Bailey Christopher L | President, Powered & Energy | Sell (S) | 4K | $4K |
| May 26, 2023 | Soell Julian R | President, Proterra Transit | Sell (S) | 21K | $24K |
| May 24, 2023 | Black David S | Chief Financial Officer | Grant (A) | 333K | $0 |
| May 24, 2023 | Black David S | Chief Financial Officer | Grant (A) | 460K | $0 |
| Mar 28, 2023 | Bailey Christopher L | President, Powered & Energy | Grant (A) | 167K | $0 |
| Mar 28, 2023 | Bailey Christopher L | President, Powered & Energy | Grant (A) | 274K | $0 |
| Mar 28, 2023 | Padilla Karina F | Chief Financial Officer | Grant (A) | 134K | $0 |
| Mar 28, 2023 | Padilla Karina F | Chief Financial Officer | Grant (A) | 73K | $0 |
| Mar 28, 2023 | Joyce Gareth T | CEO and President, Director | Grant (A) | 585K | $0 |
| Mar 28, 2023 | Joyce Gareth T | CEO and President, Director | Grant (A) | 960K | $0 |
| Mar 28, 2023 | Soell Julian R | President, Proterra Transit | Grant (A) | 167K | $0 |
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for PTRA. 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.