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 SIG 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/SIG"
Use Arkolith to show who owns SIG, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD PORTFOLIO MANAGEMENT LLC | $245.2M | 2.9M | ▲New +2.9M sh | Q1 2026 | |
| 2 | STATE STREET CORP | $138.7M | 1.6M | ▼−2.9% Reduced · −50K sh | Q1 2026 | |
| 3 | Hood River Capital Management LLC | $71.9M | 849K | ▼−0.1% Reduced · −1K sh | Q1 2026 | |
| 4 | CITADEL ADVISORS LLC | $36.8M | 435K | ▲+794% Added · +386K sh | Q1 2026 | |
| 5 | Clark Capital Management Group, Inc. | $34.8M | 411K | ▼−4.8% Reduced · −21K sh | Q1 2026 | |
| 6 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $23.4M | 276K | ▼−1.9% Reduced · −5K sh | Q1 2026 | |
| 7 | VOLORIDGE INVESTMENT MANAGEMENT, LLC | $22.3M | 263K | ▲+22% Added · +47K sh | Q1 2026 | |
| 8 | VANGUARD FIDUCIARY TRUST CO | $22.1M | 261K | ▲New +261K sh | Q1 2026 | |
| 9 | Ruffer LLP | $19.3M | 228K | ▲+23% Added · +42K sh | Q1 2026 | |
| 10 | Trexquant Investment LP | $18.6M | 220K | ▲+5.5% Added · +11K sh | Q1 2026 | |
| 11 | Junto Capital Management LP | $18.0M | 212K | ▲New +212K sh | Q1 2026 | |
| 12 | PUBLIC SECTOR PENSION INVESTMENT BOARD | $15.6M | 184K | ▲+30% Added · +42K sh | Q1 2026 | |
| 13 | Connor, Clark & Lunn Investment Management Ltd. | $14.4M | 170K | ▼−2.8% Reduced · −5K sh | Q1 2026 | |
| 14 | Caption Management, LLC | $10.4M | 123K | ▲56× Added · +121K sh | Q1 2026 | |
| 15 | Illinois Municipal Retirement Fund | $8.5M | 100K | ▲+28% Added · +22K sh | Q1 2026 | |
| 16 | PEREGRINE CAPITAL MANAGEMENT LLC | $8.2M | 97K | ▲New +97K sh | Q1 2026 | |
| 17 | WEDGE CAPITAL MANAGEMENT L L P/NC | $5.5M | 66K | ▲+21% Added · +11K sh | Q1 2026 | |
| 18 | Y-Intercept (Hong Kong) Ltd | $4.4M | 51K | ▲+157% Added · +31K sh | Q1 2026 | |
| 19 | SEGALL BRYANT & HAMILL, LLC | $3.6M | 42K | ▼−5.0% Reduced · −2K sh | Q1 2026 | |
| 20 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $3.5M | 41K | ▲+36% Added · +11K sh | Q1 2026 | |
| 21 | Gotham Asset Management, LLC | $3.2M | 38K | ▼−34% Reduced · −20K sh | Q1 2026 | |
| 22 | INTECH INVESTMENT MANAGEMENT LLC | $3.0M | 36K | ▼−35% Reduced · −20K sh | Q1 2026 | |
| 23 | Grantham, Mayo, Van Otterloo & Co. LLC | $3.0M | 35K | ▲+1.2% Added · +402 sh | Q1 2026 | |
| 24 | Sanctuary Advisors, LLC | $2.9M | 34K | ▲+15% Added · +4K sh | Q1 2026 | |
| 25 | Universal- Beteiligungs- und Servicegesellschaft mbH | $2.5M | 29K | ▼−12% Reduced · −4K 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 26, 2026 | Cividino Claudia | See Remarks | Tax withholding (F) | 223 | $20K |
| Mar 26, 2026 | Ptak Stash | * See Remarks | Tax withholding (F) | 225 | $20K |
| Mar 26, 2026 | Ciccolini Vincent | Chief Accounting Officer | Tax withholding (F) | 198 | $18K |
| Mar 26, 2026 | Hilson Joan M | * See Remarks | Tax withholding (F) | 1K | $115K |
| Mar 25, 2026 | Tilzer Brian A | Director | Sell (S) | 7K | $623K |
| Mar 24, 2026 | Yoakum Julie | See Remarks | Grant (A) | 4K | $0 |
| Mar 24, 2026 | Symancyk James Kevin | Chief Executive Officer, Director | Grant (A) | 45K | $0 |
| Mar 24, 2026 | Sagi Raghunandan R | See Remarks | Grant (A) | 6K | $0 |
| Mar 24, 2026 | Ptak Stash | * See Remarks | Grant (A) | 3K | $0 |
| Mar 24, 2026 | Hilson Joan M | * See Remarks | Grant (A) | 17K | $0 |
| Mar 24, 2026 | Cividino Claudia | See Remarks | Grant (A) | 4K | $0 |
| Mar 24, 2026 | Cho Karen Leslie | Chief People Officer | Grant (A) | 4K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 111 funds | $44.5B |
| ALPHABET INC-CL AGOOGL | 110 funds | $30.8B |
| AMAZON.COM INCAMZN | 109 funds | $34.9B |
| NVIDIA CORPNVDA | 107 funds | $63.2B |
| META PLATFORMS INC-CLASS AMETA | 107 funds | $20.5B |
| ELI LILLY & COLLY | 107 funds | $12.0B |
| VISA INC-CLASS A SHARESV | 107 funds | $9.3B |
| APPLE INCAAPL | 106 funds | $52.3B |
| BROADCOM INCAVGO | 106 funds | $23.1B |
| TESLA INCTSLA | 106 funds | $14.5B |
| GENERAL MOTORS COGM | 106 funds | $3.0B |
| MASTERCARD INC - AMA | 105 funds | $8.5B |
Ranked by how many of SIG'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 SIG. 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.