| 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 Dec 2025, 143 institutional investors reported holding 28,053,232 shares of SIGA TECHNOLOGIES INC - Common Stock (SIGA). This represents 39% of the company’s total 72,059,532 outstanding shares.
The largest institutional shareholders of SIGA TECHNOLOGIES INC - Common Stock (SIGA) together control 33% 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. | 5% | 3,589,270 | +1.8% | 0% | $21,930,440 |
| VANGUARD GROUP INC | 3.8% | 2,723,750 | +2.6% | 0% | $16,642,113 |
| DIMENSIONAL FUND ADVISORS LP | 3.5% | 2,536,794 | +4.3% | 0% | $15,500,185 |
| AltraVue Capital, LLC | 3.3% | 2,408,824 | -0.36% | 1.2% | $14,717,914 |
| AMERICAN CENTURY COMPANIES INC | 1.6% | 1,165,489 | -5.5% | 0% | $7,121,141 |
| STATE STREET CORP | 1.5% | 1,075,570 | +4% | 0% | $6,571,733 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.4% | 1,025,080 | +23% | 0% | $6,263,239 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4% | 1,004,734 | +0.65% | 0% | $6,140,303 |
| JUPITER ASSET MANAGEMENT LTD | 1.4% | 990,648 | 0% | 0.05% | $6,052,859 |
| FIRST WILSHIRE SECURITIES MANAGEMENT INC | 0.95% | 684,053 | -0.56% | 1.1% | $4,179,564 |
| GOLDMAN SACHS GROUP INC | 0.9% | 647,146 | +22% | 0% | $3,954,062 |
| CSM Advisors, LLC | 0.87% | 627,870 | +5.3% | 0.1% | $3,835,000 |
| ROYCE & ASSOCIATES LP | 0.85% | 611,019 | -10% | 0.04% | $3,733,326 |
| Legato Capital Management LLC | 0.81% | 580,545 | +13% | 0.31% | $3,547,130 |
| NEW YORK STATE COMMON RETIREMENT FUND | 0.79% | 570,561 | 0% | 0% | $3,486,128 |
| LSV ASSET MANAGEMENT | 0.75% | 538,630 | +29% | 0.01% | $3,291,000 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 0.69% | 496,166 | +7% | 0.01% | $3,031,574 |
| MORGAN STANLEY | 0.69% | 494,456 | -25% | 0% | $3,021,127 |
| RENAISSANCE TECHNOLOGIES LLC | 0.52% | 378,100 | +23% | 0% | $2,310,191 |
| DENALI ADVISORS LLC | 0.5% | 361,800 | +0.42% | 0.25% | $2,210,598 |
| VICTORY CAPITAL MANAGEMENT INC | 0.47% | 339,944 | -5% | 0% | $2,077,058 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.44% | 316,701 | -9.4% | 0% | $1,935,043 |
| ACADIAN ASSET MANAGEMENT LLC | 0.41% | 294,189 | +244% | 0% | $1,792,000 |
| SEGALL BRYANT & HAMILL, LLC | 0.38% | 274,008 | -2.4% | 0.02% | $1,674,189 |
| Bank of New York Mellon Corp | 0.35% | 254,168 | -6% | 0% | $1,552,968 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 28,053,232 | $171,547,260 | +$3,920,342 | $6.11 | 143 |
| 2025 Q3 | 33,956,454 | $310,652,079 | -$1,843,684 | $9.15 | 194 |
| 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 |