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 Q2	–	Sell	-188,484	Closed	-$1.01M	–	2214
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 $6.73T AUM 46.02% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

AltraVue Capital Bellevue, Washington $1.39B AUM 53.77% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

FWSM

First Wilshire Securities Management Pasadena, California $486M AUM 50.29% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Acadian Asset Management's SIGA Position: Q2 2026 in Review

Acadian Asset Management sold out of SIGA Technologies (SIGA) in Q2 2026, closing a stake of 188,484 shares — an estimated $1.01M sold.

Acadian Asset Management first reported a position in SIGA in Q4 2018 and held it in 10 quarters. The position peaked at $1.79M in Q4 2025. 160 funds tracked by Wall St. Rank hold SIGA as of Q2 2026.

Acadian Asset Management reported no remaining SIGA Technologies position as of Q2 2026 after selling out during the quarter.
Acadian Asset Management sold 188,484 SIGA Technologies shares in Q2 2026, an estimated $1.01M.
Acadian Asset Management first reported a position in SIGA Technologies in Q4 2018 and held it in 10 quarters.
Acadian Asset Management's SIGA Technologies position peaked at $1.79M in Q4 2025.
160 funds tracked by Wall St. Rank held SIGA Technologies as of Q2 2026.

Based on Acadian Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.