Latest Period
Q1 2026
Security Snapshot
SIGA TECHNOLOGIES INC - Common Stock (SIGA) Institutional Ownership
CUSIP: 826917106
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
181
Shares (Excl. Options)
34,389,293
Price
$5.35
Save this security page for your next review
Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.
- Security type / class
- Equity / Common Stock
- Symbol
- SIGA on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 34,389,293
- Total 13F value
- $184,016,750
- Portfolio coverage rank
- 0%
- Share change
- -1,169,676
- Value change
- -$8,414,261
- Number of holders
- 181
- Shares outstanding
- 72,059,532
- SEC-reported price per share
- $4.37
- Insider filing price
- $4.37
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SIGA - SIGA TECHNOLOGIES INC - Common Stock is tracked under CUSIP 826917106.
- 181 institutions reported positions in Q1 2026.
- 1 significant owner is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 198 to 181 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $219,044,735 to $184,016,750.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 181 institutions filings for Q1 2026.
Security key
826917106
Latest holder period
Q1 2026
13F holders
181
13D/G owners
1
CIK / CUSIP context first
Open Q1 2026 holders
SIGA full holder history
SIGA TECHNOLOGIES INC SEC filings
SIGA TECHNOLOGIES INC company facts
SIGA TECHNOLOGIES INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 826917106:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
1
Security
SIGA
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 4.7% | $21,946,451 | 3,386,798 | BlackRock, Inc. | 31 Mar 2025 |
As of 31 Mar 2026, 181 institutional investors reported holding 34,389,293 shares of SIGA TECHNOLOGIES INC - Common Stock (SIGA). This represents 48% of the company’s total 72,059,532 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
36%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4.8% | 3,494,193 | -2.6% | 0% | $18,693,934 |
| DIMENSIONAL FUND ADVISORS LP | 3.8% | 2,702,724 | +6.5% | 0% | $14,459,148 |
| AltraVue Capital, LLC | 3.4% | 2,432,024 | +0.96% | 1.1% | $13,011,328 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.4% | 1,714,380 | 0% | 0% | $9,171,933 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.1% | 1,525,960 | +49% | 0% | $8,163,886 |
| AMERICAN CENTURY COMPANIES INC | 1.8% | 1,317,784 | +13% | 0% | $7,050,144 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.8% | 1,315,545 | +31% | 0% | $7,039,567 |
| AQR CAPITAL MANAGEMENT LLC | 1.7% | 1,219,677 | +40% | 0% | $6,525,272 |
| STATE STREET CORP | 1.4% | 1,011,938 | -5.9% | 0% | $5,413,868 |
| FIRST WILSHIRE SECURITIES MANAGEMENT INC | 1.2% | 890,498 | +30% | 1.1% | $4,764,164 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 1.1% | 827,047 | +0.93% | 0.01% | $4,424,701 |
| CITADEL ADVISORS LLC | 0.98% | 705,137 | -32% | 0% | $3,772,483 |
| ROYCE & ASSOCIATES LP | 0.93% | 667,646 | +9.3% | 0.04% | $3,571,906 |
| GOLDMAN SACHS GROUP INC | 0.87% | 624,903 | -3.4% | 0% | $3,343,231 |
| NEW YORK STATE COMMON RETIREMENT FUND | 0.82% | 590,761 | +3.5% | 0% | $3,160,571 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.81% | 586,974 | 0% | 0% | $3,140,311 |
| LSV ASSET MANAGEMENT | 0.75% | 538,630 | 0% | 0.01% | $2,882,000 |
| Legato Capital Management LLC | 0.71% | 512,039 | -12% | 0.25% | $2,739,409 |
| BANK OF AMERICA CORP /DE/ | 0.67% | 484,672 | -24% | 0% | $2,592,996 |
| RENAISSANCE TECHNOLOGIES LLC | 0.66% | 475,013 | +26% | 0% | $2,541,320 |
| MILLENNIUM MANAGEMENT LLC | 0.65% | 466,324 | -4.7% | 0% | $2,494,833 |
| D. E. Shaw & Co., Inc. | 0.63% | 456,385 | -18% | 0% | $2,441,660 |
| DENALI ADVISORS LLC | 0.61% | 436,887 | +21% | 0.26% | $2,337,345 |
| TWO SIGMA INVESTMENTS, LP | 0.6% | 433,661 | +4070% | 0% | $2,320,086 |
| Qube Research & Technologies Ltd | 0.58% | 415,104 | +152% | 0% | $2,220,806 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 34,389,293 | $184,016,750 | -$8,414,261 | $5.35 | 181 |
| 2025 Q4 | 35,823,449 | $219,044,735 | +$8,977,270 | $6.11 | 198 |
| 2025 Q3 | 33,989,722 | $310,956,481 | -$1,812,025 | $9.15 | 195 |
| 2025 Q2 | 34,444,240 | $224,591,401 | -$1,096,617 | $6.52 | 174 |
| 2025 Q1 | 35,087,868 | $192,291,994 | +$2,372,072 | $5.48 | 162 |
| 2024 Q4 | 34,604,179 | $207,977,102 | -$7,735,828 | $6.01 | 167 |
| 2024 Q3 | 35,648,653 | $240,649,643 | +$11,172,706 | $6.75 | 166 |
| 2024 Q2 | 33,801,068 | $256,556,116 | +$1,743,400 | $7.59 | 148 |
| 2024 Q1 | 33,560,967 | $287,971,679 | -$4,112,729 | $8.56 | 142 |
| 2023 Q4 | 34,088,521 | $190,916,402 | -$1,744,917 | $5.60 | 126 |
| 2023 Q3 | 34,427,962 | $180,734,949 | +$7,164,161 | $5.25 | 125 |
| 2023 Q2 | 33,176,389 | $168,048,981 | +$7,622,712 | $5.05 | 128 |
| 2023 Q1 | 31,668,588 | $181,996,242 | +$1,094,029 | $5.75 | 138 |
| 2022 Q4 | 30,987,262 | $228,042,074 | +$12,857,472 | $7.36 | 154 |
| 2022 Q3 | 28,838,842 | $297,002,956 | +$26,345,105 | $10.30 | 145 |
| 2022 Q2 | 26,094,528 | $302,165,925 | +$63,278,735 | $11.58 | 136 |
| 2022 Q1 | 21,227,816 | $150,489,781 | -$6,877,910 | $7.09 | 103 |
| 2021 Q4 | 22,181,370 | $166,721,226 | +$537,549 | $7.52 | 109 |
| 2021 Q3 | 21,615,478 | $159,595,980 | +$9,341,424 | $7.39 | 99 |
| 2021 Q2 | 20,413,368 | $128,198,437 | -$7,207,931 | $6.28 | 98 |
| 2021 Q1 | 21,509,782 | $139,810,061 | -$3,577,344 | $6.50 | 103 |
| 2020 Q4 | 22,120,239 | $160,815,804 | -$6,110,599 | $7.27 | 94 |
| 2020 Q3 | 22,995,462 | $157,981,646 | -$1,884,769 | $6.87 | 103 |
| 2020 Q2 | 23,337,971 | $137,927,120 | +$2,595,604 | $5.91 | 89 |
| 2020 Q1 | 22,942,684 | $109,662,230 | +$556,102 | $4.78 | 89 |