SIGA Technologies, Inc. (SIGA) Ownership
SIGA ownership summary
as of October 17, 2026- Institutions
- 50.2% of shares outstanding
- Insiders
- 42.73% of shares outstanding
- Shares outstanding
- 71.8M
- Float
- 41.1M shares available to trade
- Short interest
- 7.74% 3.6M shares short
- Days to cover
- 5.13 short interest down 3.5% vs prior month
- Institutions 50.21%
- Insiders 42.73%
- Other investors 7.05%
SIGA top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 5.83% | 4.2M | $13.3M | +692,089 (+19.8%) | June 30, 2026 |
| 2 | Dimensional Fund Advisors, Inc. | 3.79% | 2.7M | $8.6M | +16,844 (+0.6%) | June 30, 2026 |
| 3 | AltraVue Capital, LLC | 3.24% | 2.3M | $7.4M | −104,880 (−4.3%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 2.38% | 1.7M | $5.4M | −1,679 (−0.1%) | June 30, 2026 |
| 5 | American Century Companies Inc | 2.10% | 1.5M | $4.8M | +188,281 (+14.3%) | June 30, 2026 |
| 6 | Arrowstreet Capital Limited Partnership | 2.05% | 1.5M | $4.7M | −51,143 (−3.4%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 1.97% | 1.4M | $4.5M | +101,547 (+7.7%) | June 30, 2026 |
| 8 | First Wilshire Securities Mgmt Inc (CA) | 1.86% | 1.3M | $4.2M | +449,385 (+50.5%) | June 30, 2026 |
| 9 | AQR Capital Management LLC | 1.73% | 1.2M | $3.9M | +26,315 (+2.2%) | June 30, 2026 |
| 10 | State Street Corp | 1.58% | 1.1M | $3.6M | +122,051 (+12.1%) | June 30, 2026 |
| 11 | Hotchkis & Wiley Capital Management LLC | 1.27% | 914K | $2.9M | +87,000 (+10.5%) | June 30, 2026 |
| 12 | Qube Research & Technologies | 1.03% | 741K | $2.3M | +325,806 (+78.5%) | June 30, 2026 |
| 13 | New York State Common Retirement Fund | 0.82% | 591K | $1.9M | — | June 30, 2026 |
| 14 | Millennium Management LLC | 0.81% | 580K | $1.8M | +113,275 (+24.3%) | June 30, 2026 |
| 15 | Jacobs Levy Equity Management, Inc. | 0.79% | 567K | $1.8M | +275,017 (+94.2%) | June 30, 2026 |
| 16 | Uniplan Investment Counsel, Inc. | 0.78% | 560K | $1.8M | +188,940 (+50.9%) | June 30, 2026 |
| 17 | Citadel Advisors Llc | 0.77% | 551K | $1.7M | −153,891 (−21.8%) | June 30, 2026 |
| 18 | Royce & Associates, LP | 0.77% | 551K | $1.7M | −116,636 (−17.5%) | June 30, 2026 |
| 19 | Vanguard Portfolio Management, LLC | 0.77% | 550K | $1.7M | −37,277 (−6.4%) | June 30, 2026 |
| 20 | Legato Capital Management LLC | 0.71% | 512K | $1.6M | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 2.6M shares and 6 cut 466K.
SIGA top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Avantis US Small Cap Value ETF | 1.92% | 1.4M | $4.4M | — | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 1.68% | 1.2M | $3.8M | — | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 1.58% | 1.1M | $3.6M | −13,120 (−1.1%) | September 30, 2026 |
| 4 | Fidelity Small Cap Index | 0.65% | 464K | $1.5M | −571 (−0.1%) | July 31, 2026 |
| 5 | DFA US Targeted Value I | 0.64% | 457K | $1.4M | — | August 31, 2026 |
| 6 | iShares Russell 2000 Value ETF | 0.61% | 442K | $1.4M | +670 (+0.2%) | September 30, 2026 |
| 7 | Bridge Builder Tax Managed Sm/Md Cp | 0.61% | 440K | $1.4M | — | September 30, 2026 |
| 8 | Jupiter Merian Glb Eq Abs Rt I USD Acc | 0.46% | 329K | $1.0M | — | December 31, 2025 |
| 9 | Royce Small-Cap Fund Invmt | 0.46% | 328K | $1.0M | −44,980 (−12.1%) | June 30, 2026 |
| 10 | DFA US Small Cap I | 0.44% | 315K | $997,200 | — | August 31, 2026 |
| 11 | DFA US Small Cap Value I | 0.40% | 286K | $906,620 | +4,843 (+1.7%) | August 31, 2026 |
| 12 | DFA US Micro Cap I | 0.36% | 256K | $811,041 | — | August 31, 2026 |
| 13 | Victory Small Cap Stock | 0.34% | 245K | $777,649 | — | June 30, 2026 |
| 14 | Vanguard Russell 2000 ETF | 0.34% | 244K | $773,337 | +4,800 (+2.0%) | August 31, 2026 |
| 15 | Old Mutual Global Equity R | 0.34% | 243K | $770,567 | — | December 31, 2025 |
| 16 | Hotchkis & Wiley Sm Cp Divers Val I | 0.33% | 240K | $761,117 | — | August 31, 2026 |
| 17 | Fidelity Extended Market Index | 0.32% | 227K | $720,690 | −1,222 (−0.5%) | August 31, 2026 |
| 18 | Schwab US Small-Cap ETF™ | 0.31% | 221K | $699,483 | +144 (+0.1%) | September 30, 2026 |
| 19 | Dimensional US Core Equity 2 ETF | 0.26% | 184K | $582,456 | — | September 30, 2026 |
| 20 | Multi-Manager Small Cap Eq Strat Inst | 0.25% | 183K | $579,086 | −4,502 (−2.4%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SIGA insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2021-12-09 | James Antal | Sell | $7.82 | 30,000 | $234,600 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
SIGA shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SIGA
Institutional investors own 50.2% of SIGA Technologies's shares and insiders 42.73%. The largest holder is BlackRock Inc with 5.83% of the shares (4.2M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 6 reduced their stake in the latest filings. Short interest is 7.74% of the float, or 5.13 days of average trading volume. The share count rose 33.8% since 2014.
Related: SIGA analyst forecast, SIGA key metrics, SIGA dividend history. See the SIGA stock overview for the latest quote and news.
SIGA ownership FAQ
Who owns the most SIGA Technologies stock?
The largest shareholders of SIGA Technologies are BlackRock Inc (5.83%), Dimensional Fund Advisors, Inc. (3.79%), AltraVue Capital, LLC (3.24%), Vanguard Capital Management, LLC (2.38%), American Century Companies Inc (2.10%).
What percentage of SIGA Technologies is owned by institutions?
Institutions hold 50.2% of SIGA Technologies's shares outstanding; insiders hold 42.73%.
Which funds own SIGA Technologies?
The largest fund holders of SIGA Technologies are Avantis US Small Cap Value ETF (1.92%), Vanguard MStar Total Stk Mkt Idx Invest (1.68%), iShares Russell 2000 ETF (1.58%), Fidelity Small Cap Index (0.65%), DFA US Targeted Value I (0.64%).
What is SIGA Technologies's short interest?
3.6M shares of SIGA Technologies were sold short, 7.74% of the float; at the average daily volume it would take 5.13 days to cover.
Are insiders buying or selling SIGA Technologies?
Of the latest 1 reported insider transactions in SIGA Technologies (since December 9, 2021), 0 were purchases and 1 were sales.
How many shares of SIGA Technologies are outstanding?
SIGA Technologies has 71.8M shares outstanding, of which 41.1M are in the public float.