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 ETF page is the Follow view. The Build view lets your agent query SPIN institutional owners, quarter-over-quarter 13F changes, and source filings through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/SPIN"
Use Arkolith to show who owns SPIN, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $939K | 31K | ▲+148% Added · +18K sh | Q1 2026 | |
| 2 | Cerity Partners LLC | $724K | 24K | ▲New +24K sh | Q1 2026 | |
| 3 | WealthPoint Financial, LLC | $555K | 18K | ▲+22% Added · +3K sh | Q1 2026 | |
| 4 | OLD MISSION CAPITAL LLC | $472K | 15K | ▼−5.1% Reduced · −834 sh | Q1 2026 | |
| 5 | ENVESTNET ASSET MANAGEMENT INC | $255K | 8K | ▲+8.6% Added · +660 sh | Q1 2026 | |
| 6 | Avior Wealth Management, LLC | $229K | 8K | ▲New +8K sh | Q1 2026 | |
| 7 | CWM, LLC | $43K | 1K | —Held | Q1 2026 | |
| 8 | Allworth Financial LP | $12K | 400 | ▲+33% Added · +100 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.
| Company | Co-held by | Combined value |
|---|---|---|
| ISHARES CORE S&P 500 ETFIVV | 8 funds | $24.8B |
| SS SPDR S&P 500 ETF TRUST-USSPY | 8 funds | $10.9B |
| VANGUARD S&P 500 ETFVOO | 8 funds | $10.1B |
| NVIDIA CORPNVDA | 8 funds | $8.8B |
| MICROSOFT CORPMSFT | 8 funds | $8.2B |
| APPLE INCAAPL | 8 funds | $8.0B |
| ISHARES CORE MSCI EMERGINGIEMG | 8 funds | $7.7B |
| INVESCO QQQ TRUST SERIES 1QQQ | 8 funds | $7.5B |
| VANGUARD FTSE DEVELOPED ETFVEA | 8 funds | $7.0B |
| ISHRS US E F R A ETF-USD INCDYNF | 8 funds | $6.9B |
| ISHARES S&P 500 VALUE ETFIVE | 8 funds | $6.5B |
| ISHARES S&P 500 GROWTH ETFIVW | 8 funds | $6.3B |
Ranked by how many of SPIN's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + quarter-over-quarter ownership changes + end-of-day price history + the live filing stream, joined for SPIN. 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.