SIGA TECHNOLOGIES INC (SIGA) Institutional Ownership Changes & 13F Activity
SIGA TECHNOLOGIES INC (SIGA). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include First Wilshire Securities Management Inc, Qube Research & Technologies Ltd, Jacobs Levy Equity Management, Inc, Goldman Sachs Group Inc, and Ameriprise Financial Inc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Cim Investment Management Inc | Buy | +1,771 | +7.3% | 26,150 | $95.19K | Q2 2026 | Sep 29, 2026 |
| Envestnet Asset Management Inc | Buy | +5,987 | +49.7% | 18,040 | $65.67K | Q2 2026 | Sep 23, 2026 |
| State Street Corp | Buy | +122,051 | +12.1% | 1,133,989 | $4.13M | Q2 2026 | Sep 22, 2026 |
| Manufacturers Life Insurance Company, The | Buy | +2,724 | +23.4% | 14,366 | $52.29K | Q2 2026 | Sep 09, 2026 |
| Citadel Advisors Llc | Sell | -153,891 | -21.8% | 551,246 | $2.01M | Q2 2026 | Sep 02, 2026 |
| California State Teachers Retirement System | Sell | -1,647 | -74.1% | 576 | $2.10K | Q2 2026 | Aug 24, 2026 |
| Mercer Global Advisors Inc | Buy | +291 | +1.5% | 19,170 | $69.78K | Q2 2026 | Aug 19, 2026 |
| Public Employees Retirement System Of Ohio | Buy | +20,900 | +116.8% | 38,800 | $141.23K | Q2 2026 | Aug 17, 2026 |
| Empowered Funds, Llc | Buy | +13,299 | +43.9% | 43,615 | $158.76K | Q2 2026 | Aug 17, 2026 |
| First Wilshire Securities Management Inc | Buy | +449,385 | +50.5% | 1,339,883 | $4.88M | Q2 2026 | Aug 14, 2026 |
| Qube Research & Technologies Ltd | Buy | +325,806 | +78.5% | 740,910 | $2.70M | Q2 2026 | Aug 14, 2026 |
| Jacobs Levy Equity Management, Inc | Buy | +275,017 | +94.2% | 566,863 | $2.06M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Sell | -231,896 | -37.1% | 393,007 | $1.43M | Q2 2026 | Aug 14, 2026 |
| Ameriprise Financial Inc | Buy | +193,368 | — | 193,368 | $703.86K | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Sell | -191,485 | -42.0% | 264,900 | $964.24K | Q2 2026 | Aug 14, 2026 |
| Uniplan Investment Counsel, Inc. | Buy | +188,940 | +50.9% | 560,353 | $2.04M | Q2 2026 | Aug 14, 2026 |
| Royce & Associates Lp | Sell | -116,636 | -17.5% | 551,010 | $2.01M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Buy | +113,275 | +24.3% | 579,599 | $2.11M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +113,091 | — | 113,091 | $411.65K | Q2 2026 | Aug 14, 2026 |
| Hotchkis & Wiley Capital Management Llc | Buy | +87,000 | +10.5% | 914,047 | $3.33M | Q2 2026 | Aug 14, 2026 |
| Two Sigma Investments, Lp | Sell | -75,946 | -17.5% | 357,715 | $1.30M | Q2 2026 | Aug 14, 2026 |
| Man Group Plc | Buy | +62,835 | +66.5% | 157,348 | $572.75K | Q2 2026 | Aug 14, 2026 |
| Xtx Topco Ltd | Buy | +62,668 | — | 62,668 | $228.11K | Q2 2026 | Aug 14, 2026 |
| Atom Investors Lp | Buy | +57,464 | — | 57,464 | $209.17K | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Sell | -57,397 | -11.8% | 427,275 | $1.56M | Q2 2026 | Aug 14, 2026 |
| Schonfeld Strategic Advisors Llc | Buy | +41,937 | +163.5% | 67,581 | $245.99K | Q2 2026 | Aug 14, 2026 |
| Tudor Investment Corp Et Al | Buy | +37,237 | — | 37,237 | $135.54K | Q2 2026 | Aug 14, 2026 |
| Susquehanna International Group, Llp | Buy | +28,547 | +115.3% | 53,314 | $194.06K | Q2 2026 | Aug 14, 2026 |
| Aqr Capital Management Llc | Buy | +26,315 | +2.2% | 1,245,992 | $4.54M | Q2 2026 | Aug 14, 2026 |
| Cambria Investment Management, L.P. | Buy | +22,950 | +54.5% | 65,033 | $236.72K | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about SIGA activity
Which institutional owners are buying SIGA?
Institutional owners buying SIGA include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in SIGA activity?
"Buy" means an investor increased their reported position in SIGA compared to the prior reporting period. This reflects growing exposure to SIGA TECHNOLOGIES INC (SIGA) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in SIGA increasing?
Institutional interest in SIGA can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related SIGA Institutional Insights
- SIGA Overview
- SIGA 13F Institutional Holders
- SIGA Top Institutional Shareholders
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- SIGA Insider Trading & SEC Form 4 Activity
- SIGA Articles
- Top Institutional Investor Stock Rankings