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 CAST 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/CAST"
Use Arkolith to show who owns CAST, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Advisory Services Network, LLC | $262K | 59K | ▲New +59K sh | Q1 2026 | |
| 2 | MILLENNIUM MANAGEMENT LLC | $116K | 26K | ▲New +26K sh | Q1 2026 | |
| 3 | CHOREO, LLC | $64K | 14K | ▲New +14K sh | Q1 2026 | |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | $57K | 13K | ▲New +13K sh | Q1 2026 | |
| 5 | TWO SIGMA SECURITIES, LLC | $47K | 11K | ▲New +11K sh | Q1 2026 | |
| 6 | Financial Management Professionals, Inc. | $19K | 3K | ▲New +3K sh | Q2 2026 | |
| 7 | JPMORGAN CHASE & CO | $13K | 3K | ▲New +3K sh | Q1 2026 | |
| 8 | MORGAN STANLEY | $12K | 3K | ▲New +3K sh | Q1 2026 | |
| 9 | UBS Group AG | $468 | 105 | ▲New +105 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Apr 20, 2026 | MOBLEY WILLIAM A JR | Chief Executive Officer, Director, 10% Owner | Conversion (C) | 484K | — |
| Apr 17, 2026 | MOBLEY WILLIAM A JR | Chief Executive Officer, Director, 10% Owner | Sell (S) | 506K | — |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 6 funds | $150.5B |
| APPLE INCAAPL | 6 funds | $133.5B |
| MICROSOFT CORPMSFT | 6 funds | $105.4B |
| AMAZON.COM INCAMZN | 6 funds | $78.1B |
| SS SPDR S&P 500 ETF TRUST-USSPY | 6 funds | $63.9B |
| ALPHABET INC-CL AGOOGL | 6 funds | $61.8B |
| ALPHABET INC-CL CGOOG | 6 funds | $59.2B |
| BROADCOM INCAVGO | 6 funds | $58.8B |
| META PLATFORMS INC-CLASS AMETA | 6 funds | $55.2B |
| ISHARES CORE S&P 500 ETFIVV | 6 funds | $42.0B |
| VANGUARD S&P 500 ETFVOO | 6 funds | $34.0B |
| TESLA INCTSLA | 6 funds | $33.6B |
Ranked by how many of CAST's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for CAST. 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.