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 ETF page is the Follow view. The Build view lets your agent query BCOR institutional owners, quarter-over-quarter 13F changes, and source filings through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/BCOR"
Use Arkolith to show who owns BCOR, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | GTS SECURITIES LLC | $556K | 26K | ▲+10% Added · +2K sh | Q1 2026 |
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.
13F holdings + quarter-over-quarter ownership changes + end-of-day price history + the live filing stream, joined for BCOR. 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.