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; 161 institutions reported holding it in 13F filings for Q2 2026, worth $127.0M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Siga Technologies Inc as of Dec 31, 2025. 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
- 200
- +6 vs. Q3 2025
- Shares held
- 35.8M
- +1.99M (+5.9%) vs. Q3 2025
- Total value
- $219.1M
- −$90.5M (−29.2%) vs. Q3 2025
- New holders
- 26
- 77 more added
- Sold out
- 20
- 61 more reduced
3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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 | 161 | $127.0M |
| 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, Q4 2025
Shares, value and share of portfolio for each institution holding Siga Technologies Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Walleye Capital LLC | 0 | $0 | 0.00% | −90,906−100.0% | Sold out |
| Penn Mutual Asset Management, LLC | 0 | $0 | 0.00% | −38,280−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −29,201−100.0% | Sold out |
| Petrus Trust Company, LTA | 0 | $0 | 0.00% | −26,414−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −25,828−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −19,700−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −18,358−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −16,135−100.0% | Sold out |
| PharVision Advisers, LLC | 0 | $0 | 0.00% | −15,061−100.0% | Sold out |
| Bailard, Inc. | 0 | $0 | 0.00% | −14,200−100.0% | Sold out |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0 | $0 | 0.00% | −12,078−100.0% | Sold out |
| One Wealth Advisors, LLC | 0 | $0 | 0.00% | −11,622−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −10,441−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −10,059−100.0% | Sold out |
| National Bank of Canada | 0 | $0 | 0.00% | −2,963−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −2,488−100.0% | Sold out |
| Altshuler Shaham Ltd | 0 | $0 | 0.00% | −488−100.0% | Sold out |
| UMA Financial Services, Inc. | 0 | $0 | 0.00% | −154−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |
| Corton Capital Inc. | – | – | – | – | Not filed |
| Point72 (DIFC) Ltd | – | – | – | – | Not filed |