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 JEM 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/JEM"
Use Arkolith to show who owns JEM, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | JANE STREET GROUP, LLC | $23K | 241K | ▲New +241K sh | Q1 2026 | |
| 2 | XTX Topco Ltd | $22K | 228K | ▲+325% Added · +175K sh | Q1 2026 | |
| 3 | UBS Group AG | $8K | 83K | ▲New +83K sh | Q1 2026 | |
| 4 | CITADEL ADVISORS LLC | $3K | 26K | ▲+5.3% Added · +1K sh | Q1 2026 | |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $1K | 14K | —Held | 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 |
|---|---|---|---|---|---|
| Jul 8, 2026 | HRT FINANCIAL LP | 10% Owner | Sell (S) | 112K | $127K |
| Jul 7, 2026 | HRT FINANCIAL LP | 10% Owner | Buy (P) | 137K | $187K |
| Company | Co-held by | Combined value |
|---|---|---|
| SS SPDR S&P 500 ETF TRUST-USSPY | 5 funds | $21.5B |
| NVIDIA CORPNVDA | 5 funds | $18.0B |
| APPLE INCAAPL | 5 funds | $14.2B |
| MICROSOFT CORPMSFT | 5 funds | $13.3B |
| BROADCOM INCAVGO | 5 funds | $10.1B |
| AMAZON.COM INCAMZN | 5 funds | $9.8B |
| ALPHABET INC-CL AGOOGL | 5 funds | $8.3B |
| JPMORGAN CHASE & COJPM | 5 funds | $6.6B |
| META PLATFORMS INC-CLASS AMETA | 5 funds | $6.5B |
| ALPHABET INC-CL CGOOG | 5 funds | $6.3B |
| ISHARES CORE S&P 500 ETFIVV | 5 funds | $5.8B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 5 funds | $5.3B |
Ranked by how many of JEM'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 JEM. 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.