SIGA Technologies
SIGA
197 hedge funds and large institutions have $311M invested in SIGA Technologies in 2025 Q3 according to their latest regulatory filings, with 38 funds opening new positions, 67 increasing their positions, 56 reducing their positions, and 17 closing their positions.
179% more call options, than puts
Call options by funds: $789K | Put options by funds: $283K
124% more first-time investments, than exits
New positions opened: 38 | Existing positions closed: 17
38% more capital invested
Capital invested by funds: $225M → $311M (+$86.2M)
20% more repeat investments, than reductions
Existing positions increased: 67 | Existing positions reduced: 56
11% more funds holding
Funds holding: 177 → 197 (+20)
0.78% less ownership
Funds ownership: 48.25% → 47.47% (-0.78%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AQR Capital Management
Greenwich,
Connecticut
|
+$2.63M |
| 2 |
Janus Henderson Group
London,
United Kingdom
|
+$2.15M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$2.05M |
| 4 |
CA
CSM Advisors
Warrendale,
Pennsylvania
|
+$1.9M |
| 5 |
Millennium Management
New York
|
+$1.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Hotchkis & Wiley Capital Management
Los Angeles,
California
|
-$9.91M |
| 2 |
GAI
General American Investors
New York
|
-$3.52M |
| 3 |
Renaissance Technologies
New York
|
-$2.32M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$2.15M |
| 5 |
American Century Companies
Kansas City,
Missouri
|
-$1.38M |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
201
Tudor Investment Corp
Stamford,
Connecticut
| – | -$238K | -36,576 | Closed |
|
202
Two Sigma Advisers
New York
| – | -$209K | -32,100 | Closed |
|
|
BHCM
203
Brevan Howard Capital Management
St. Helier,
Jersey
| – | -$189K | -28,936 | Closed |
|
|
KI
204
Kapitalo Investimentos
Sao Paulo,
Brazil
| – | -$183K | -28,089 | Closed |
|
|
OAM
205
Oxford Asset Management
Oxford,
United Kingdom
| – | -$177K | -27,112 | Closed |
|
|
FIM
206
Freedom Investment Management
Hartford,
Connecticut
| – | -$110K | -16,799 | Closed |
|
207
VOYA Investment Management
Atlanta,
Georgia
| – | -$85.2K | -13,065 | Closed |
|
208
ProShare Advisors
Bethesda,
Maryland
| – | -$72.3K | -11,089 | Closed |
|
|
BIG
209
Brooklyn Investment Group
Brooklyn,
New York
| – | -$38K | -5,829 | Closed |
|
|
SSG
210
Summit Securities Group
New York
| – | -$28.5K | -4,365 | Closed |
|
|
SPIA
211
Steward Partners Investment Advisory
New York
| – | -$18.9K | -2,900 | Closed |
|
212
Raymond James Financial
St Petersburg,
Florida
| – | -$6.84K | -1,049 | Closed |
|
|
SC
213
Stephens Consulting
Flint,
Michigan
| – | -$424 | -65 | Closed |
|
SIGA Hedge Fund Activity: Q3 2025 in Review
197 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in SIGA Technologies (SIGA) for Q3 2025, worth a combined $311M — up 38% from $225M a quarter earlier.
Buyers outnumbered sellers: 38 funds opened new SIGA positions and 17 closed out — a net gain of 21 holders — while 67 added to existing stakes and 56 trimmed.
The largest buyer was AQR Capital Management, adding an estimated $2.63M. The largest seller was Hotchkis & Wiley Capital Management, cutting an estimated $9.91M.
- 197 institutional investors held SIGA Technologies (SIGA) as of Q3 2025, up from 177 in Q2 2025.
- Funds reported $311M of SIGA Technologies stock for Q3 2025, up 38% quarter-over-quarter.
- 38 funds opened new SIGA Technologies positions in Q3 2025 and 17 closed out, a net change of +21 holders.
- The largest SIGA Technologies buyer in Q3 2025 was AQR Capital Management, an estimated $2.63M added.
- The largest SIGA Technologies seller in Q3 2025 was Hotchkis & Wiley Capital Management, an estimated $9.91M sold.
Based on aggregated 13F filings for Q3 2025.