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 MEMX 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/MEMX"
Use Arkolith to show who owns MEMX, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | LPL Financial LLC | $1.2M | 30K | ▲+183% Added · +19K sh | Q1 2026 | |
| 2 | Chicago Partners Investment Group LLC | $1.1M | 24K | ▼−4.4% Reduced · −1K sh | Q1 2026 | |
| 3 | Rockefeller Capital Management L.P. | $672K | 17K | ▲+18% Added · +3K sh | Q1 2026 | |
| 4 | CITADEL ADVISORS LLC | $672K | 17K | ▲New +17K sh | Q1 2026 | |
| 5 | OLD MISSION CAPITAL LLC | $378K | 9K | ▼−74% Reduced · −27K sh | Q1 2026 | |
| 6 | MERCER GLOBAL ADVISORS INC /ADV | $343K | 9K | ▼−0.1% Reduced · −9 sh | Q1 2026 | |
| 7 | Ameritas Advisory Services, LLC | $322K | 8K | ▲+43% Added · +2K sh | Q1 2026 | |
| 8 | ENVESTNET ASSET MANAGEMENT INC | $306K | 8K | —Held | Q1 2026 | |
| 9 | OSAIC HOLDINGS, INC. | $28K | 706 | ▼−39% Reduced · −453 sh | Q1 2026 | |
| 10 | UBS Group AG | $14K | 348 | ▲New +348 sh | Q1 2026 | |
| 11 | Spire Wealth Management | $3K | 65 | —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.
No Form 4 insider transactions on file yet.
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 4 funds | $5.0B |
| ISHARES CORE S&P 500 ETFIVV | 4 funds | $3.5B |
| APPLE INCAAPL | 4 funds | $3.3B |
| AMAZON.COM INCAMZN | 4 funds | $3.0B |
| MICROSOFT CORPMSFT | 4 funds | $3.0B |
| SS SPDR S&P 500 ETF TRUST-USSPY | 4 funds | $2.2B |
| ALPHABET INC-CL AGOOGL | 4 funds | $2.2B |
| BROADCOM INCAVGO | 4 funds | $2.0B |
| META PLATFORMS INC-CLASS AMETA | 4 funds | $1.8B |
| MICRON TECHNOLOGY INCMU | 4 funds | $1.7B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 4 funds | $1.6B |
| SS SPDR DOW JONES INDUS AVGDIA | 4 funds | $1.6B |
Ranked by how many of MEMX'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 MEMX. 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.