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 SI 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/SI"
Use Arkolith to show who owns SI, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Alyeska Investment Group, L.P. | $3.4M | 233K | —Held | Q1 2026 | |
| 2 | STATE STREET CORP | $1.4M | 93K | ▲+60% Added · +35K sh | Q1 2026 | |
| 3 | Walleye Capital LLC | $1.2M | 85K | ▼−8.8% Reduced · −8K sh | Q1 2026 | |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $886K | 61K | ▲New +61K sh | Q1 2026 | |
| 5 | READYSTATE ASSET MANAGEMENT LP | $573K | 39K | —Held | Q1 2026 | |
| 6 | VANGUARD FIDUCIARY TRUST CO | $547K | 38K | ▲New +38K sh | Q1 2026 | |
| 7 | Blue Trust, Inc. | $228K | 16K | ▲New +16K sh | Q1 2026 | |
| 8 | CITADEL ADVISORS LLC | $197K | 14K | ▼−28% Reduced · −5K sh | Q1 2026 | |
| 9 | MetLife Investment Management, LLC | $90K | 6K | ▲New +6K sh | Q1 2026 | |
| 10 | Steward Partners Investment Advisory, LLC | $15K | 1K | —Held | Q1 2026 | |
| 11 | Ameritas Investment Partners, Inc. | $6K | 400 | —Held | Q1 2026 | |
| 12 | CWM, LLC | $3K | 201 | ▲+33% Added · +50 sh | Q1 2026 | |
| 13 | Sterling Capital Management LLC | $2K | 156 | ▲+24% Added · +30 sh | Q1 2026 | |
| 14 | Root Financial Partners, LLC | $102 | 7 | ▲New +7 sh | Q1 2026 | |
| 15 | Arax Advisory Partners | $87 | 6 | ▲New +6 sh | Q1 2026 | |
| 16 | MAI Capital Management | $59 | 4 | ▲New +4 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 |
|---|---|---|---|---|---|
| Mar 13, 2026 | BUCKMAN PAUL | Director | Option exercise (M) | 26K | $55K |
| Mar 13, 2026 | BUCKMAN PAUL | Director | Option exercise (M) | 19K | $0 |
| Mar 13, 2026 | Ball Robert Joseph | CEO & Executive Chairman, Director | Buy (P) | 2K | $33K |
| Mar 13, 2026 | BUCKMAN PAUL | Director | Tax withholding (F) | 4K | $55K |
| Mar 13, 2026 | Points Jeffrey S. | Chief Financial Officer | Option exercise (M) | 13K | $0 |
| Mar 13, 2026 | Points Jeffrey S. | Chief Financial Officer | Option exercise (M) | 13K | $33K |
| Mar 13, 2026 | Points Jeffrey S. | Chief Financial Officer | Buy (P) | 2K | $30K |
| Mar 13, 2026 | BUCKMAN PAUL | Director | Tax withholding (F) | 3K | $48K |
| Mar 13, 2026 | BUCKMAN PAUL | Director | Option exercise (M) | 19K | $48K |
| Mar 13, 2026 | BUCKMAN PAUL | Director | Option exercise (M) | 26K | $0 |
| Mar 13, 2026 | Buchholz Richard | Director | Buy (P) | 1K | $15K |
| Feb 6, 2026 | Ball Robert Joseph | CEO & Executive Chairman, Director | Option exercise (M) | 10K | $25K |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 14 funds | $8.1B |
| AMAZON.COM INCAMZN | 14 funds | $5.2B |
| MICROSOFT CORPMSFT | 14 funds | $4.0B |
| META PLATFORMS INC-CLASS AMETA | 14 funds | $3.0B |
| ALPHABET INC-CL AGOOGL | 14 funds | $2.8B |
| MICRON TECHNOLOGY INCMU | 14 funds | $2.5B |
| BROADCOM INCAVGO | 14 funds | $2.4B |
| JOHNSON & JOHNSONJNJ | 14 funds | $1.5B |
| HOME DEPOT INCHD | 14 funds | $1.2B |
| GENERAL ELECTRICGE | 14 funds | $966.5M |
| BLACKROCK INCBLK | 14 funds | $852.9M |
| CHEVRON CORPCVX | 14 funds | $832.4M |
Ranked by how many of SI'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 SI. 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.