Siga Technologies Inc
SIGA- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001010086
No open-market purchases or sales by Siga Technologies Inc insiders were filed in the last 90 days; 160 institutions reported holding it in 13F filings for Q2 2026, worth $126.9M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Siga Technologies Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 183
- −12 vs. Q4 2025
- Shares held
- 34.4M
- +1.49M (+4.5%) vs. Q4 2025
- Total value
- $184.0M
- −$17.2M (−8.5%) vs. Q4 2025
- New holders
- 27
- 66 more added
- Sold out
- 39
- 68 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting SIGA on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 160 | $126.9M |
| Q1 2026 | 183 | $184.0M |
| Q4 2025 | 200 | $219.1M |
| Q3 2025 | 197 | $311.0M |
| Q2 2025 | 178 | $224.8M |
| Q1 2025 | 167 | $192.5M |
| Q4 2024 | 170 | $208.0M |
| Q3 2024 | 169 | $240.7M |
| Q2 2024 | 151 | $256.6M |
| Q1 2024 | 144 | $288.1M |
| Q4 2023 | 131 | $190.9M |
| Q3 2023 | 129 | $180.8M |
| Q2 2023 | 131 | $168.1M |
| Q1 2023 | 142 | $182.1M |
| Q4 2022 | 160 | $227.9M |
| Q3 2022 | 155 | $296.8M |
| Q2 2022 | 142 | $302.3M |
| Q1 2022 | 110 | $150.5M |
| Q4 2021 | 116 | $166.7M |
| Q3 2021 | 104 | $159.6M |
| Q2 2021 | 102 | $128.2M |
| Q1 2021 | 105 | $139.8M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Siga Technologies Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 3,494,193 | $18.7M | 0.00% | −95,077−2.6% | Reduced |
| Dimensional Fund Advisors LP | 2,702,724 | $14.5M | 0.00% | +165,930+6.5% | Added |
| AltraVue Capital, LLC | 2,432,024 | $13.0M | 1.12% | +23,200+1.0% | Added |
| Vanguard Capital Management LLC | 1,714,380 | $9.17M | 0.00% | +1,714,380 | New |
| Arrowstreet Capital, Limited Partnership | 1,525,960 | $8.16M | 0.00% | +500,880+48.9% | Added |
| American Century Companies Inc | 1,317,784 | $7.05M | 0.00% | +152,295+13.1% | Added |
| Geode Capital Management, LLC | 1,315,545 | $7.04M | 0.00% | +310,811+30.9% | Added |
| AQR Capital Management LLC | 1,219,677 | $6.53M | 0.00% | +346,882+39.7% | Added |
| State Street Corp | 1,011,938 | $5.41M | 0.00% | −63,632−5.9% | Reduced |
| First Wilshire Securities Management Inc | 890,498 | $4.76M | 1.07% | +206,445+30.2% | Added |
| Hotchkis & Wiley Capital Management LLC | 827,047 | $4.42M | 0.01% | +7,600+0.9% | Added |
| Citadel Advisors LLC | 705,137 | $3.77M | 0.00% | −337,946−32.4% | Reduced |
| Royce & Associates LP | 667,646 | $3.57M | 0.04% | +56,627+9.3% | Added |
| Goldman Sachs Group Inc | 624,903 | $3.34M | 0.00% | −22,243−3.4% | Reduced |
| New York State Common Retirement Fund | 590,761 | $3.16M | 0.00% | +20,200+3.5% | Added |
| Vanguard Portfolio Management LLC | 586,974 | $3.14M | 0.00% | +586,974 | New |
| LSV Asset Management | 538,630 | $2.88M | 0.01% | 00.0% | Unchanged |
| Legato Capital Management LLC | 512,039 | $2.74M | 0.25% | −68,506−11.8% | Reduced |
| Bank of America Corp | 484,672 | $2.59M | 0.00% | −156,749−24.4% | Reduced |
| Renaissance Technologies LLC | 475,013 | $2.54M | 0.00% | +96,913+25.6% | Added |
| Millennium Management LLC | 466,324 | $2.49M | 0.00% | −22,986−4.7% | Reduced |
| D. E. Shaw & Co., Inc. | 456,385 | $2.44M | 0.00% | −98,186−17.7% | Reduced |
| Denali Advisors LLC | 436,887 | $2.34M | 0.26% | +75,087+20.8% | Added |
| Two Sigma Investments, LP | 433,661 | $2.32M | 0.00% | +423,261+4,069.8% | Added |
| Qube Research & Technologies Ltd | 415,104 | $2.22M | 0.00% | +250,269+151.8% | Added |
| Victory Capital Management Inc | 376,571 | $2.01M | 0.00% | +36,627+10.8% | Added |
| Uniplan Investment Counsel, Inc. | 371,413 | $1.99M | 0.20% | −24,484−6.2% | Reduced |
| HRT Financial LP | 360,067 | $1.93M | 0.00% | +360,067 | New |
| Charles Schwab Investment Management Inc | 340,321 | $1.82M | 0.00% | +23,620+7.5% | Added |
| Northern Trust Corp | 340,175 | $1.82M | 0.00% | −35,672−9.5% | Reduced |
| Jacobs Levy Equity Management, Inc | 291,846 | $1.56M | 0.01% | −204,320−41.2% | Reduced |
| Vanguard Fiduciary Trust Co | 275,178 | $1.47M | 0.00% | +275,178 | New |
| Segall Bryant & Hamill, LLC | 273,522 | $1.46M | 0.02% | −486−0.2% | Reduced |
| Morgan Stanley | 263,335 | $1.41M | 0.00% | −231,121−46.7% | Reduced |
| Bank of New York Mellon Corp | 256,803 | $1.37M | 0.00% | +2,635+1.0% | Added |
| Nomura Asset Management International Inc. | 244,853 | $1.31M | 0.00% | 00.0% | Unchanged |
| Macquarie Group Ltd | 244,853 | $1.31M | 0.01% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 188,484 | $1.01M | 0.00% | −105,705−35.9% | Reduced |
| Janus Henderson Group PLC | 187,521 | $1.00M | 0.00% | −1,196−0.6% | Reduced |
| Ameriprise Financial Inc | 183,537 | $981.9K | 0.00% | −14,473−7.3% | Reduced |
| State of Wisconsin Investment Board | 177,800 | $951.2K | 0.00% | −37,516−17.4% | Reduced |
| Creative Planning | 168,555 | $901.8K | 0.00% | +96,274+133.2% | Added |
| First Trust Advisors LP | 160,355 | $857.9K | 0.00% | +5,411+3.5% | Added |
| State Board of Administration of Florida Retirement System | 131,626 | $704.2K | 0.00% | −107,349−44.9% | Reduced |
| Winton Group Ltd | 124,391 | $665.5K | 0.02% | +27,014+27.7% | Added |
| Invesco Ltd. | 111,518 | $596.6K | 0.00% | −1,919−1.7% | Reduced |
| STRS Ohio | 109,900 | $588.0K | 0.00% | +19,800+22.0% | Added |
| O'Shaughnessy Asset Management, LLC | 107,138 | $573.2K | 0.00% | +57,481+115.8% | Added |
| UBS Group AG | 104,062 | $556.7K | 0.00% | +81,666+364.6% | Added |
| SummerHaven Investment Management, LLC | 101,025 | $540.5K | 0.33% | −21,684−17.7% | Reduced |
| Nuveen, LLC | 100,899 | $539.8K | 0.00% | +801+0.8% | Added |
| Prudential Financial Inc | 100,590 | $538.2K | 0.00% | +3,698+3.8% | Added |
| Man Group plc | 94,513 | $505.6K | 0.00% | +36,969+64.2% | Added |
| Trexquant Investment LP | 93,440 | $499.9K | 0.00% | +35,843+62.2% | Added |
| Martingale Asset Management L P | 92,260 | $493.6K | 0.01% | 00.0% | Unchanged |
| Campbell & CO Investment Adviser LLC | 92,125 | $492.9K | 0.03% | +36,477+65.5% | Added |
| Vanguard Global Advisers, LLC | 90,778 | $485.7K | 0.00% | +90,778 | New |
| KLP Kapitalforvaltning AS | 87,200 | $466.5K | 0.00% | −9,000−9.4% | Reduced |
| State of Wyoming | 85,240 | $456.0K | 0.05% | +2,291+2.8% | Added |
| Alliancebernstein L.P. | 63,710 | $389.3K | 0.00% | 00.0% | Unchanged |
| Canada Pension Plan Investment Board | 69,400 | $371.3K | 0.00% | −5,600−7.5% | Reduced |
| Los Angeles Capital Management LLC | 69,082 | $369.6K | 0.00% | +22,529+48.4% | Added |
| Wealth Enhancement Advisory Services, LLC | 66,668 | $349.3K | 0.00% | +726+1.1% | Added |
| Price T Rowe Associates Inc | 63,337 | $339.0K | 0.00% | +16,993+36.7% | Added |
| Jefferies Financial Group Inc. | 62,667 | $335.3K | 0.00% | +62,667 | New |
| Squarepoint Ops LLC | 58,571 | $313.4K | 0.00% | +43,557+290.1% | Added |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | 53,694 | $287.3K | 0.00% | +9,772+22.2% | Added |
| James Investment Research Inc | 53,546 | $286.5K | 0.03% | 00.0% | Unchanged |
| Jane Street Group, LLC | 52,080 | $278.6K | 0.00% | −68,778−56.9% | Reduced |
| Rhumbline Advisers | 51,142 | $273.6K | 0.00% | −2,493−4.6% | Reduced |
| Strategic Blueprint, LLC | 50,000 | $267.5K | 0.02% | −1,100−2.2% | Reduced |
| Davenport & Co LLC | 50,000 | $267.5K | 0.00% | 00.0% | Unchanged |
| SEI Investments Co | 48,420 | $259.0K | 0.00% | +23,400+93.5% | Added |
| Exchange Traded Concepts, LLC | 46,878 | $250.8K | 0.00% | +6,990+17.5% | Added |
| Franklin Resources Inc | 43,862 | $234.7K | 0.00% | −16,270−27.1% | Reduced |
| DGS Capital Management, LLC | 42,434 | $227.0K | 0.04% | −7,936−15.8% | Reduced |
| Cambria Investment Management, L.P. | 42,083 | $225.1K | 0.01% | +16,185+62.5% | Added |
| Vestcor Inc | 41,200 | $220.0K | 0.01% | −12,117−22.7% | Reduced |
| Inspire Advisors, LLC | 40,823 | $218.4K | 0.02% | +24,056+143.5% | Added |
| Cresset Asset Management, LLC | 40,690 | $217.7K | 0.00% | 00.0% | Unchanged |
| EntryPoint Capital, LLC | 38,200 | $204.4K | 0.06% | +38,200 | New |
| Point72 Asset Management, L.P. | 37,728 | $201.8K | 0.00% | +37,728 | New |
| Russell Investments Group, Ltd. | 37,665 | $201.5K | 0.00% | +2,410+6.8% | Added |
| Deutsche Bank AG | 37,164 | $198.8K | 0.00% | +5,652+17.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 36,064 | $192.9K | 0.00% | +36,064 | New |
| Quantinno Capital Management LP | 31,589 | $169.0K | 0.00% | +11,592+58.0% | Added |
| Empowered Funds, LLC | 30,316 | $162.2K | 0.00% | +30,316 | New |
| Graham Capital Management, L.P. | 29,907 | $160.0K | 0.01% | +29,907 | New |
| Federated Hermes, Inc. | 28,422 | $152.1K | 0.00% | −111,088−79.6% | Reduced |
| Mirabella Financial Services LLP | 26,812 | $143.4K | 0.01% | +26,812 | New |
| Washington Growth Strategies LLC | 26,216 | $140.3K | 0.09% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 25,996 | $139.1K | 0.00% | +25,996 | New |
| Schonfeld Strategic Advisors LLC | 25,644 | $137.2K | 0.00% | −19,110−42.7% | Reduced |
| Susquehanna International Group, LLP | 24,767 | $132.5K | 0.00% | +24,767 | New |
| JPMorgan Chase & Co | 25,186 | $132.5K | 0.00% | −159,780−86.4% | Reduced |
| Lazard Asset Management LLC | 24,519 | $131.2K | 0.00% | −23,247−48.7% | Reduced |
| Cim Investment Mangement Inc | 24,379 | $130.4K | 0.03% | 00.0% | Unchanged |
| FMR LLC | 23,402 | $125.2K | 0.00% | +17,693+309.9% | Added |
| CIBC Bancorp USA Inc. | 23,384 | $125.1K | 0.00% | +23,384 | New |
| Significant Wealth Partners LLC | 23,131 | $123.8K | 0.15% | +929+4.2% | Added |