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 SIGA 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/SIGA"
Use Arkolith to show who owns SIGA, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $18.7M | 3.5M | ▼−2.6% Reduced · −95K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $16.6M | 2.7M | ▲+2.5% Added · +68K sh | Q4 2025 | |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | $7.0M | 1.3M | ▲+31% Added · +311K sh | Q1 2026 | |
| 4 | STATE STREET CORP | $5.4M | 1.0M | ▼−5.9% Reduced · −64K sh | Q1 2026 | |
| 5 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $4.4M | 827K | ▲+0.9% Added · +8K sh | Q1 2026 | |
| 6 | CITADEL ADVISORS LLC | $3.8M | 705K | ▼−32% Reduced · −338K sh | Q1 2026 | |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | $3.1M | 587K | ▲New +587K sh | Q1 2026 | |
| 8 | JACOBS LEVY EQUITY MANAGEMENT, INC | $1.6M | 292K | ▼−41% Reduced · −204K sh | Q1 2026 | |
| 9 | VANGUARD FIDUCIARY TRUST CO | $1.5M | 275K | ▲New +275K sh | Q1 2026 | |
| 10 | SEGALL BRYANT & HAMILL, LLC | $1.5M | 274K | ▼−0.2% Reduced · −486 sh | Q1 2026 | |
| 11 | STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | $704K | 132K | ▼−45% Reduced · −107K sh | Q1 2026 | |
| 12 | WINTON GROUP Ltd | $665K | 124K | ▲+28% Added · +27K sh | Q1 2026 | |
| 13 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $573K | 107K | ▲+116% Added · +57K sh | Q1 2026 | |
| 14 | Man Group plc | $506K | 95K | ▲+64% Added · +37K sh | Q1 2026 | |
| 15 | Trexquant Investment LP | $500K | 93K | ▲+62% Added · +36K sh | Q1 2026 | |
| 16 | LOS ANGELES CAPITAL MANAGEMENT LLC | $370K | 69K | ▲+48% Added · +23K sh | Q1 2026 | |
| 17 | WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $349K | 67K | ▲+1.1% Added · +726 sh | Q1 2026 | |
| 18 | Jefferies Financial Group Inc. | $335K | 63K | ▲New +63K sh | Q1 2026 | |
| 19 | Empirical Financial Services, LLC d.b.a. Empirical Wealth Ma | $287K | 54K | ▲+22% Added · +10K sh | Q1 2026 | |
| 20 | DAVENPORT & Co LLC | $268K | 50K | —Held | Q1 2026 | |
| 21 | Strategic Blueprint, LLC | $268K | 50K | ▼−2.1% Reduced · −1K sh | Q1 2026 | |
| 22 | EXCHANGE TRADED CONCEPTS, LLC | $251K | 47K | ▲+18% Added · +7K sh | Q1 2026 | |
| 23 | Cambria Investment Management, L.P. | $225K | 42K | ▲+62% Added · +16K sh | Q1 2026 | |
| 24 | Cresset Asset Management, LLC | $218K | 41K | —Held | Q1 2026 | |
| 25 | Point72 Asset Management, L.P. | $202K | 38K | ▲New +38K 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 9, 2026 | DURNAN JAYMIE A | Director | Disposed to issuer (D) | 7K | $32K |
| Jun 9, 2026 | DURNAN JAYMIE A | Director | Option exercise (M) | 24K | $0 |
| Jun 9, 2026 | DURNAN JAYMIE A | Director | Grant (A) | 34K | $0 |
| Jun 9, 2026 | Nabel Gary J. | Director | Option exercise (M) | 24K | — |
| Jun 9, 2026 | Nabel Gary J. | Director | Disposed to issuer (D) | 7K | $32K |
| Jun 9, 2026 | Nabel Gary J. | Director | Option exercise (M) | 24K | $0 |
| Jun 9, 2026 | Nabel Gary J. | Director | Grant (A) | 34K | $0 |
| Jun 9, 2026 | Ford Harold Eugene Jr. | Director | Option exercise (M) | 24K | — |
| Jun 9, 2026 | Ford Harold Eugene Jr. | Director | Disposed to issuer (D) | 7K | $32K |
| Jun 9, 2026 | Ford Harold Eugene Jr. | Director | Option exercise (M) | 24K | $0 |
| Jun 9, 2026 | DURNAN JAYMIE A | Director | Option exercise (M) | 24K | — |
| Jun 9, 2026 | Ford Harold Eugene Jr. | Director | Grant (A) | 34K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 57 funds | $25.8B |
| AMAZON.COM INCAMZN | 56 funds | $19.4B |
| ALPHABET INC-CL AGOOGL | 56 funds | $17.0B |
| META PLATFORMS INC-CLASS AMETA | 56 funds | $12.4B |
| NVIDIA CORPNVDA | 55 funds | $38.6B |
| BROADCOM INCAVGO | 55 funds | $14.3B |
| ELI LILLY & COLLY | 55 funds | $6.4B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 55 funds | $6.0B |
| VISA INC-CLASS A SHARESV | 55 funds | $5.0B |
| COSTCO WHOLESALE CORPCOST | 55 funds | $4.9B |
| CHEVRON CORPCVX | 55 funds | $4.0B |
| PALANTIR TECHNOLOGIES INC-APLTR | 55 funds | $3.9B |
Ranked by how many of SIGA'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 SIGA. 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.