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 OSI 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/OSI"
Use Arkolith to show who owns OSI, 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 30, 2024 | JEFFERIES LLC | 10% Owner | Other (J) | 2.3M | — |
| Jun 8, 2022 | Rattner Benjamin F | President, Director | Sell (S) | 275K | $0 |
| Jun 8, 2022 | Fortinbras Enterprises LP | 10% Owner | Buy (P) | 275K | $0 |
| Apr 22, 2022 | Delrahim Makan | Director | Sell (S) | 40K | $0 |
| Apr 22, 2022 | Fonseca Dhiren R. | Director | Sell (S) | 40K | $0 |
| Apr 22, 2022 | Mielle Dominique | Director | Sell (S) | 40K | $0 |
| Apr 22, 2022 | Fortinbras Enterprises Holdings LLC | 10% Owner | Buy (P) | 120K | $0 |
| Apr 19, 2022 | Fortinbras Enterprises Holdings LLC | 10% Owner | Grant (A) | 135K | — |
| Jul 1, 2021 | Abt Michael V | Director | Other (J) | 36K | — |
| Jul 1, 2021 | Rattner Benjamin F | President and Director, Director | Other (J) | 86K | — |
| Jul 1, 2021 | Johnson Omar | Director | Other (J) | 43K | — |
| Jul 1, 2021 | Fortinbras SPAC Holdings LLC | 10% Owner | Other (J) | 697K | — |
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OSI. 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.