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 SIBN 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/SIBN"
Use Arkolith to show who owns SIBN, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $49.3M | 2.5M | ▲+0.5% Added · +12K sh | Q4 2025 | |
| 2 | BlackRock, Inc. | $43.3M | 3.4M | ▼−1.7% Reduced · −59K sh | Q1 2026 | |
| 3 | Granahan Investment Management, LLC | $22.0M | 1.7M | ▲+98% Added · +859K sh | Q1 2026 | |
| 4 | Impax Asset Management Group plc | $18.0M | 1.4M | ▲+19% Added · +225K sh | Q1 2026 | |
| 5 | STATE STREET CORP | $14.3M | 1.1M | ▲+12% Added · +125K sh | Q1 2026 | |
| 6 | PARADIGM CAPITAL MANAGEMENT INC/NY | $14.2M | 1.1M | ▲+113% Added · +598K sh | Q1 2026 | |
| 7 | GILDER GAGNON HOWE & CO LLC | $13.2M | 1.0M | ▲+153% Added · +635K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $12.0M | 952K | ▲+3.3% Added · +30K sh | Q1 2026 | |
| 9 | Champlain Investment Partners, LLC | $11.1M | 878K | ▼−21% Reduced · −239K sh | Q1 2026 | |
| 10 | Point72 Asset Management, L.P. | $10.6M | 840K | ▲+13% Added · +94K sh | Q1 2026 | |
| 11 | First Eagle Investment Management, LLC | $8.1M | 639K | ▲+19% Added · +101K sh | Q1 2026 | |
| 12 | PEREGRINE CAPITAL MANAGEMENT LLC | $5.4M | 428K | ▲+13% Added · +49K sh | Q1 2026 | |
| 13 | VANGUARD PORTFOLIO MANAGEMENT LLC | $5.2M | 413K | ▲New +413K sh | Q1 2026 | |
| 14 | TOCQUEVILLE ASSET MANAGEMENT L.P. | $3.8M | 304K | —Held | Q1 2026 | |
| 15 | VANGUARD FIDUCIARY TRUST CO | $3.5M | 275K | ▲New +275K sh | Q1 2026 | |
| 16 | CITADEL ADVISORS LLC | $2.4M | 188K | ▼−39% Reduced · −122K sh | Q1 2026 | |
| 17 | TUDOR INVESTMENT CORP ET AL | $1.6M | 130K | ▼−50% Reduced · −129K sh | Q1 2026 | |
| 18 | Engineers Gate Manager LP | $1.2M | 95K | ▲+4.2% Added · +4K sh | Q1 2026 | |
| 19 | Trexquant Investment LP | $1.1M | 89K | ▼−21% Reduced · −24K sh | Q1 2026 | |
| 20 | Man Group plc | $1.0M | 83K | ▲+69% Added · +34K sh | Q1 2026 | |
| 21 | Caption Management, LLC | $947K | 75K | ▲178× Added · +75K sh | Q1 2026 | |
| 22 | Universal- Beteiligungs- und Servicegesellschaft mbH | $938K | 74K | ▼−28% Reduced · −29K sh | Q1 2026 | |
| 23 | Sterling Capital Management LLC | $568K | 45K | ▼−45% Reduced · −37K sh | Q1 2026 | |
| 24 | D.A. DAVIDSON & CO. | $466K | 37K | ▲+5.7% Added · +2K sh | Q1 2026 | |
| 25 | Perpetual Ltd | $402K | 32K | ▲+6.9% Added · +2K 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 |
|---|---|---|---|---|---|
| Jun 5, 2026 | DUNN JEFFREY W | Director | Sell (S) | 4K | $55K |
| Jun 4, 2026 | Nishimura Mika | Director | Grant (A) | 11K | $0 |
| Jun 4, 2026 | West Thomas A. | Director | Grant (A) | 11K | $0 |
| Jun 4, 2026 | HILLEMAN JERYL L | Director | Grant (A) | 11K | $0 |
| Jun 4, 2026 | DUNN JEFFREY W | Director | Grant (A) | 11K | $0 |
| Jun 4, 2026 | Freund John Gordon | Director | Grant (A) | 11K | $0 |
| Jun 4, 2026 | Davis Timothy E JR | Director | Grant (A) | 11K | $0 |
| Mar 12, 2026 | Nishimura Mika | Director | Sell (S) | 4K | $57K |
| Feb 17, 2026 | RECUPERO ANTHONY J | Insider | Sell (S) | 2K | $26K |
| Feb 17, 2026 | RECUPERO ANTHONY J | Insider | Sell (S) | 3K | $47K |
| Feb 17, 2026 | RECUPERO ANTHONY J | Insider | Sell (S) | 2K | $32K |
| Feb 17, 2026 | RECUPERO ANTHONY J | Insider | Sell (S) | 3K | $47K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 54 funds | $22.5B |
| AMAZON.COM INCAMZN | 53 funds | $16.7B |
| ALPHABET INC-CL AGOOGL | 53 funds | $15.1B |
| BOSTON SCIENTIFIC CORPBSX | 53 funds | $2.0B |
| ELI LILLY & COLLY | 52 funds | $6.1B |
| VISA INC-CLASS A SHARESV | 52 funds | $4.9B |
| NVIDIA CORPNVDA | 51 funds | $33.9B |
| BROADCOM INCAVGO | 51 funds | $12.5B |
| META PLATFORMS INC-CLASS AMETA | 51 funds | $12.0B |
| UNITEDHEALTH GROUP INCUNH | 51 funds | $2.2B |
| MICRON TECHNOLOGY INCMU | 50 funds | $5.3B |
| MASTERCARD INC - AMA | 50 funds | $4.0B |
Ranked by how many of SIBN'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 SIBN. 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.