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 ECX 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/ECX"
Use Arkolith to show who owns ECX, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | TUDOR INVESTMENT CORP ET AL | $2.1M | 2.2M | ▲+2.9% Added · +61K sh | Q1 2026 | |
| 2 | STATE STREET CORP | $1.2M | 1.2M | ▼−1.2% Reduced · −15K sh | Q1 2026 | |
| 3 | Centiva Capital, LP | $112K | 114K | ▲New +114K sh | Q1 2026 | |
| 4 | Altshuler Shaham Ltd | $35K | 600K | —Held | Q1 2026 | |
| 5 | CITADEL ADVISORS LLC | $22K | 23K | ▼−99% Reduced · −2.4M sh | Q1 2026 | |
| 6 | SBI Securities Co., Ltd. | $378 | 387 | ▲+5.4% Added · +20 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 |
|---|---|---|---|---|---|
| Sep 27, 2023 | Heng Jun Hong | Director | Sell (S) | 3K | $9K |
| Sep 26, 2023 | Heng Jun Hong | Director | Sell (S) | 47K | $157K |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 6 funds | $4.2B |
| AMAZON.COM INCAMZN | 6 funds | $2.3B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 6 funds | $2.0B |
| APPLE INCAAPL | 6 funds | $1.9B |
| MICRON TECHNOLOGY INCMU | 6 funds | $1.7B |
| MICROSOFT CORPMSFT | 6 funds | $1.3B |
| ALPHABET INC-CL AGOOGL | 6 funds | $1.3B |
| META PLATFORMS INC-CLASS AMETA | 6 funds | $1.3B |
| BROADCOM INCAVGO | 6 funds | $1.3B |
| TESLA INCTSLA | 6 funds | $1.1B |
| JPMORGAN CHASE & COJPM | 6 funds | $901.6M |
| COSTCO WHOLESALE CORPCOST | 6 funds | $603.8M |
Ranked by how many of ECX'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 ECX. 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.