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 BTCZ 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/BTCZ"
Use Arkolith to show who owns BTCZ, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $90K | 17K | ▲+254% Added · +12K 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.
No Form 4 insider transactions on file yet.
| Class | 13F holders | Value held |
|---|---|---|
| BTCLT REX TARGET ETF | 6 funds | $536K |
| ETUT REX 2X LONG ET | 4 funds | $96K |
| BTCZthis pageT REX TARGET ETF | 3 funds | $1.4M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
| Company | Co-held by | Combined value |
|---|---|---|
| MICRON TECHNOLOGY INCMU | 7 funds | $2.6B |
| BROADCOM INCAVGO | 7 funds | $2.5B |
| TESLA INCTSLA | 7 funds | $2.1B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 7 funds | $1.9B |
| MICROSOFT CORPMSFT | 7 funds | $1.9B |
| AMAZON.COM INCAMZN | 7 funds | $1.8B |
| ALPHABET INC-CL AGOOGL | 7 funds | $1.7B |
| UNITEDHEALTH GROUP INCUNH | 7 funds | $1.7B |
| ORACLE CORPORCL | 7 funds | $1.3B |
| META PLATFORMS INC-CLASS AMETA | 7 funds | $1.2B |
Ranked by how many of BTCZ's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
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 BTCZ. 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.