Acadian Asset Management’s SIGA Technologies SIGA Stock Holding History

Acadian Asset Management’s Portfolio SIGA Stock Details SIGA Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$1.01M	Sell	188,484 -105,705	-36%	-$659K	﹤0.01%	1163
2025 Q4	$1.79M	Buy	294,189 +208,708	+244%	+$1.48M	﹤0.01%	945
2025 Q3	$778K	Buy	+85,481	New	+$683K	﹤0.01%	1114
2021 Q3	–	Sell	-22,401	Closed	-$141K	–	1982
2021 Q2	$141K	Buy	22,401 +7,654	+52%	+$52.6K	﹤0.01%	1543
2021 Q1	$95K	Buy	+14,747	New	+$100K	﹤0.01%	1685
2020 Q1	–	Sell	-35,829	Closed	-$171K	–	1929
2019 Q4	$171K	Sell	35,829 -159,262	-82%	-$811K	﹤0.01%	1325
2019 Q3	$999K	Buy	195,091 +8,250	+4%	+$44.5K	﹤0.01%	891
2019 Q2	$1.06M	Buy	186,841 +58,916	+46%	+$326K	0.01%	794
2019 Q1	$769K	Buy	127,925 +127,546	+33,653%	+$856K	﹤0.01%	986
2018 Q4	$3K	Buy	+379	New	+$2.17K	﹤0.01%	1686

Other funds holding SIGA

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

AltraVue Capital Bellevue, Washington $1.16B AUM 46.45% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

FWSM

First Wilshire Securities Management Pasadena, California $444M AUM 42.88% 1-Year Est. Return

Acadian Asset Management's SIGA Position: Q1 2026 in Review

Acadian Asset Management reduced its SIGA Technologies (SIGA) stake by 36% in Q1 2026, selling an estimated $659K and leaving 188,484 shares worth $1.01M. The position accounts for ﹤0.01% of the portfolio, ranked #1163.

Acadian Asset Management first reported a position in SIGA in Q4 2018 and has held it in 10 quarters since. The position peaked at $1.79M in Q4 2025. 183 funds tracked by Wall St. Rank hold SIGA as of Q1 2026.

Acadian Asset Management held 188,484 shares of SIGA Technologies worth $1.01M as of Q1 2026.
Acadian Asset Management sold 105,705 SIGA Technologies shares in Q1 2026, an estimated $659K.
SIGA Technologies made up ﹤0.01% of Acadian Asset Management's portfolio in Q1 2026, its #1163 holding.
Acadian Asset Management first reported a position in SIGA Technologies in Q4 2018 and has held it in 10 quarters since.
Acadian Asset Management's SIGA Technologies position peaked at $1.79M in Q4 2025.
183 funds tracked by Wall St. Rank held SIGA Technologies as of Q1 2026.

Based on Acadian Asset Management's 13F filing for Q1 2026, filed 13 May 2026.