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 USM 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/USM"
Use Arkolith to show who owns USM, 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 |
|---|---|---|---|---|---|
| Aug 18, 2025 | HARCZAK HARRY J JR | Director | Sell (S) | 2K | $149K |
| Aug 12, 2025 | Chambers Douglas W | Interim President and CEO, Director | Sell (S) | 93K | $7.1M |
| Aug 1, 2025 | HARCZAK HARRY J JR | Director | Grant (A) | 2K | $144K |
| Aug 1, 2025 | CARLSON WALTER CD | Director | Grant (A) | 1K | $84K |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Option exercise (M) | 12K | — |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Tax withholding (F) | 5K | $398K |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Disposed to issuer (D) | 67K | $4.9M |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Tax withholding (F) | 19K | $1.4M |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Option exercise (M) | 67K | — |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Option exercise (M) | 41K | — |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Option exercise (M) | 14K | — |
| Aug 1, 2025 | Chambers Douglas W | Interim President and CEO, Director | Option exercise (M) | 30K | — |
No filings captured for this ticker in the live stream yet.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for USM. 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.