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
180
Shares (Excl. Options)
34,115,771
Price
$5.35
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- Type / Class
- Equity / Common Stock
- Symbol
- SIGA on Nasdaq
- Shares outstanding
- 72,059,532
- Price per share
- $4.40
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 34,115,771
- Total reported value
- $182,553,407
- % of total 13F portfolios
- 0%
- Share change
- -1,443,198
- Value change
- -$10,085,850
- Number of holders
- 180
- Price from insider filings
- $4.40
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- SIGA - SIGA TECHNOLOGIES INC - Common Stock is tracked under CUSIP 826917106.
- 180 institutions reported positions in Q1 2026.
- 1 significant owner is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 198 to 180 between Q4 2025 and Q1 2026.
- Reported value moved from $219,044,735 to $182,553,407.
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 180 institutions filings for Q1 2026.
Security key
826917106
Latest holder period
Q1 2026
13F holders
180
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:
Significant Owners of SIGA TECHNOLOGIES INC - Common Stock (SIGA) based on Schedule 13D/G filings
| 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, 180 institutional investors reported holding 34,115,771 shares of SIGA TECHNOLOGIES INC - Common Stock (SIGA). This represents 47% of the company’s total 72,059,532 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of SIGA TECHNOLOGIES INC - Common Stock (SIGA) together control 36% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| 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 |
Institutional Holders of SIGA TECHNOLOGIES INC - Common Stock (SIGA) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 34,115,771 | $182,553,407 | -$10,085,850 | $5.35 | 180 |
| 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 |
| 2019 Q4 | 22,819,028 | $108,845,564 | +$2,641,825 | $4.77 | 97 |
| 2019 Q3 | 22,211,955 | $113,940,877 | +$5,578,863 | $5.12 | 97 |
| 2019 Q2 | 21,087,317 | $119,763,436 | +$9,845,235 | $5.68 | 90 |
| 2019 Q1 | 19,677,390 | $118,257,286 | +$618,429 | $6.01 | 104 |
| 2018 Q4 | 19,273,935 | $152,260,457 | +$12,887,038 | $7.90 | 87 |
| 2018 Q3 | 16,468,586 | $113,468,868 | +$3,013,309 | $6.89 | 71 |
| 2018 Q2 | 16,030,581 | $95,228,080 | +$18,089,931 | $5.94 | 57 |
| 2018 Q1 | 12,967,705 | $79,485,642 | +$46,417,642 | $6.13 | 33 |
| 2017 Q4 | 5,251,130 | $25,468,000 | -$78,000 | $4.85 | 3 |
| 2017 Q3 | 5,276,545 | $16,726,000 | -$967,739 | $3.17 | 4 |
| 2017 Q2 | 5,581,801 | $16,968,000 | +$1,521,988 | $3.04 | 3 |
| 2017 Q1 | 5,081,140 | $15,955,000 | +$71,047 | $3.15 | 2 |
| 2016 Q4 | 5,058,526 | $14,569,000 | +$296,569 | $2.90 | 2 |
| 2016 Q3 | 4,955,721 | $14,818,000 | $2.99 | 1 | |
| 2016 Q2 | 4,955,721 | $7,136,000 | $1.44 | 1 | |
| 2016 Q1 | 4,955,721 | $2,627,000 | -$23,915 | $0.53 | 1 |
| 2015 Q4 | 5,020,527 | $2,108,000 | +$69,115 | $0.42 | 2 |
| 2015 Q3 | 5,227,473 | $6,168,000 | -$160,802 | $1.18 | 3 |
| 2015 Q2 | 5,477,048 | $7,066,000 | -$638,500 | $1.29 | 5 |
| 2015 Q1 | 5,693,489 | $11,044,500 | -$11,978,320 | $1.94 | 11 |
| 2014 Q4 | 14,142,620 | $20,360,200 | -$171,283 | $1.44 | 42 |
| 2014 Q3 | 14,298,681 | $20,657,350 | -$4,887,640 | $1.44 | 49 |
| 2014 Q2 | 15,123,795 | $42,649,705 | -$4,285,145 | $2.82 | 63 |
| 2014 Q1 | 16,529,009 | $51,212,648 | +$2,554,629 | $3.10 | 73 |