Security Snapshot

SIGA TECHNOLOGIES INC - Common Stock (SIGA) Institutional Ownership

CUSIP: 826917106

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

196

Shares (Excl. Options)

35,737,743

Price

$6.11

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Type / Class
Equity / Common Stock
Symbol
SIGA on Nasdaq
Shares outstanding
72,059,532
Price per share
$5.35
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
35,737,743
Total reported value
$218,521,071
% of total 13F portfolios
0%
Share change
+1,636,670
Value change
+$8,978,028
Number of holders
196
Price from insider filings
$5.35
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Quick Takeaways

  • SIGA - SIGA TECHNOLOGIES INC - Common Stock is tracked under CUSIP 826917106.
  • 196 institutions reported positions in Q4 2025.
  • 1 significant owner is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 196 to 24 between Q4 2025 and Q1 2026.
  • Reported value moved from $218,521,071 to $2,886,442.

Why This Matters

  • 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.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 196 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 826917106?
CUSIP 826917106 identifies SIGA - SIGA TECHNOLOGIES INC - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

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 Dec 2025, 196 institutional investors reported holding 35,737,743 shares of SIGA TECHNOLOGIES INC - Common Stock (SIGA). This represents 50% 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 37% 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
CITADEL ADVISORS LLC 1.4% 1,043,083 -7.3% 0% $6,373,237
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
AQR CAPITAL MANAGEMENT LLC 1.2% 872,795 +151% 0% $5,332,778
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC 1.1% 819,447 -0.98% 0.01% $5,006,821
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
BANK OF AMERICA CORP /DE/ 0.89% 641,421 +24% 0% $3,919,082
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
D. E. Shaw & Co., Inc. 0.77% 554,571 +11% 0% $3,388,429
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
MILLENNIUM MANAGEMENT LLC 0.68% 489,310 +91% 0% $2,989,684
Uniplan Investment Counsel, Inc. 0.55% 395,897 -0.16% 0.24% $2,418,932

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 541,121 $2,886,442 -$175,062 $5.35 24
2025 Q4 35,737,743 $218,521,071 +$8,978,028 $6.11 196
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