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 DSNY 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/DSNY"
Use Arkolith to show who owns DSNY, 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 |
|---|---|---|---|---|---|
| Dec 19, 2025 | Graber Mark A | 10% Owner | Sell (S) | 100K | $46K |
| Jul 25, 2023 | Mossberg David M. | Director | Grant (A) | 10K | $0 |
| Jul 25, 2023 | Vandenberg Fred | Chief Executive Officer, Director | Grant (A) | 20K | $0 |
| Jul 25, 2023 | Cho Hyonmyong | Director | Grant (A) | 10K | $0 |
| Jul 25, 2023 | Summers David Alexander | Director | Grant (A) | 10K | $0 |
| Jul 25, 2023 | Massalitina Olya | Chief Financial Officer | Grant (A) | 30K | $0 |
| Jul 25, 2023 | GRABER SAMUEL JAY | Director | Grant (A) | 10K | $0 |
| Aug 15, 2022 | Graber Mark A | 10% Owner | Buy (P) | 82K | $48K |
| Aug 4, 2022 | Graber Mark A | 10% Owner | Buy (P) | 3K | $2K |
| Aug 3, 2022 | Graber Mark A | 10% Owner | Buy (P) | 15K | $9K |
| Aug 2, 2022 | Graber Mark A | 10% Owner | Buy (P) | 10K | $6K |
| Aug 1, 2022 | Graber Mark A | 10% Owner | Buy (P) | 25K | $15K |
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for DSNY. 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.