Who owns SIGA TECHNOLOGIES INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of SIGA from SEC Form 13F filings across 161 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 161 institutions disclosed 35.2M shares of SIGA TECHNOLOGIES INC worth $126.1M — about 49% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
161
13F holders
$126.1M
value, 2026 filers
49%
of shares outstanding (35.2M sh)
19
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of SIGA's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.2M | $15.2M | 0.0% | 5.8% | +19.8% |
| 2 | DIMENSIONAL FUND ADVISORS LP | 2.7M | $9.9M | 0.0% | 3.8% | +0.6% |
| 3 | AltraVue Capital, LLC | 2.3M | $8.5M | 0.6% | 3.2% | -4.3% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $6.2M | 0.0% | 2.4% | -0.1% |
| 5 | AMERICAN CENTURY COMPANIES INC | 1.5M | $5.5M | 0.0% | 2.1% | +14.3% |
| 6 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.5M | $5.4M | 0.0% | 2.1% | -3.4% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 1.4M | $5.2M | 0.0% | 2% | +7.7% |
| 8 | FIRST WILSHIRE SECURITIES MANAGEMENT INC | 1.3M | $4.9M | 1.0% | 1.9% | +50.5% |
| 9 | AQR CAPITAL MANAGEMENT LLC | 1.2M | $4.5M | 0.0% | 1.7% | +2.2% |
| 10 | STATE STREET CORP | 1.1M | $4.1M | 0.0% | 1.6% | +12.1% |
| 11 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 914,047 | $3.3M | 0.0% | 1.3% | +10.5% |
| 12 | Qube Research & Technologies Ltd | 740,910 | $2.7M | 0.0% | 1% | +78.5% |
| 13 | NEW YORK STATE COMMON RETIREMENT FUND | 590,761 | $2.2M | 0.0% | 0.8% | 0.0% |
| 14 | MILLENNIUM MANAGEMENT LLC | 579,599 | $2.1M | 0.0% | 0.8% | +24.3% |
| 15 | JACOBS LEVY EQUITY MANAGEMENT, INC | 566,863 | $2.1M | 0.0% | 0.8% | +94.2% |
| 16 | Uniplan Investment Counsel, Inc. | 560,353 | $2.0M | 0.2% | 0.8% | +50.9% |
| 17 | CITADEL ADVISORS LLC | 551,246 | $2.0M | 0.0% | 0.8% | -21.8% |
| 18 | ROYCE & ASSOCIATES LP | 551,010 | $2.0M | 0.0% | 0.8% | -17.5% |
| 19 | VANGUARD PORTFOLIO MANAGEMENT LLC | 549,697 | $2.0M | 0.0% | 0.8% | -6.4% |
| 20 | Legato Capital Management LLC | 512,039 | $1.9M | 0.2% | 0.7% | 0.0% |
| 21 | LSV ASSET MANAGEMENT | 461,307 | $1,679 | 0.0% | 0.6% | -14.4% |
| 22 | BANK OF AMERICA CORP /DE/ | 427,275 | $1.6M | 0.0% | 0.6% | -11.8% |
| 23 | RENAISSANCE TECHNOLOGIES LLC | 425,800 | $1.5M | 0.0% | 0.6% | -10.4% |
| 24 | MORGAN STANLEY | 421,009 | $1.5M | 0.0% | 0.6% | +59.9% |
| 25 | DENALI ADVISORS LLC | 414,436 | $1.5M | 0.2% | 0.6% | -5.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.