Arrowstreet Capital
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Arrowstreet Capital’s SIGA Technologies SIGA Stock Holding History

Arrowstreet Capital’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 		$5.37M Sell
1,474,817
-51,143
-3% -$229K ﹤0.01% 1270
2026
Q1 		$8.16M Buy
1,525,960
+500,880
+49% +$3.12M ﹤0.01% 1003
2025
Q4 		$6.26M Buy
1,025,080
+190,397
+23% +$1.35M ﹤0.01% 1081
2025
Q3 		$7.64M Buy
834,683
+255,902
+44% +$2.05M ﹤0.01% 1037
2025
Q2 		$3.77M Sell
578,781
-14,492
-2% -$86.9K ﹤0.01% 1265
2025
Q1 		$3.25M Buy
593,273
+161,500
+37% +$956K ﹤0.01% 1148
2024
Q4 		$2.59M Sell
431,773
-375,059
-46% -$2.51M ﹤0.01% 1207
2024
Q3 		$5.45M Buy
806,832
+206,093
+34% +$1.8M ﹤0.01% 939
2024
Q2 		$4.56M Buy
600,739
+13,166
+2% +$107K ﹤0.01% 868
2024
Q1 		$5.03M Buy
+587,573
New +$3.35M ﹤0.01% 890
2023
Q2 		– Sell
-187,720
Closed -$1.08M – 1454
2023
Q1 		$1.08M Sell
187,720
-454,693
-71% -$3.04M ﹤0.01% 1048
2022
Q4 		$4.73M Buy
642,413
+574,853
+851% +$5.04M 0.01% 692
2022
Q3 		$696K Buy
67,560
+34,137
+102% +$548K ﹤0.01% 1050
2022
Q2 		$387K Sell
33,423
-36,335
-52% -$327K ﹤0.01% 1096
2022
Q1 		$495K Sell
69,758
-163,370
-70% -$1.09M ﹤0.01% 1031
2021
Q4 		$1.75M Sell
233,128
-111,906
-32% -$853K ﹤0.01% 1048
2021
Q3 		$2.55M Sell
345,034
-355,600
-51% -$2.28M ﹤0.01% 1078
2021
Q2 		$4.4M Buy
700,634
+102,629
+17% +$705K 0.01% 1112
2021
Q1 		$3.89M Sell
598,005
-23,116
-4% -$157K 0.01% 1288
2020
Q4 		$4.52M Buy
621,121
+42,985
+7% +$303K 0.01% 1233
2020
Q3 		$3.97M Buy
578,136
+63,615
+12% +$432K 0.01% 1255
2020
Q2 		$3.04M Buy
+514,521
New +$2.94M 0.01% 1273
2018
Q3 		– Sell
-10,900
Closed -$65K – 1236
2018
Q2 		$65K Buy
+10,900
New +$70.8K ﹤0.01% 1046

Other funds holding SIGA

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
AC
AltraVue Capital Bellevue, Washington $1.39B AUM 53.77% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Geode Capital Management
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
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $34.3B AUM 22.63% 1-Year Est. Return

Arrowstreet Capital's SIGA Position: Q2 2026 in Review

Arrowstreet Capital reduced its SIGA Technologies (SIGA) stake by 3.4% in Q2 2026, selling an estimated $229K and leaving 1,474,817 shares worth $5.37M. The position accounts for ﹤0.01% of the portfolio, ranked #1270.

Arrowstreet Capital first reported a position in SIGA in Q2 2018 and has held it in 23 quarters since. The position peaked at $8.16M in Q1 2026. 161 funds tracked by Wall St. Rank hold SIGA as of Q2 2026.

  • Arrowstreet Capital held 1,474,817 shares of SIGA Technologies worth $5.37M as of Q2 2026.
  • Arrowstreet Capital sold 51,143 SIGA Technologies shares in Q2 2026, an estimated $229K.
  • SIGA Technologies made up ﹤0.01% of Arrowstreet Capital's portfolio in Q2 2026, its #1270 holding.
  • Arrowstreet Capital first reported a position in SIGA Technologies in Q2 2018 and has held it in 23 quarters since.
  • Arrowstreet Capital's SIGA Technologies position peaked at $8.16M in Q1 2026.
  • 161 funds tracked by Wall St. Rank held SIGA Technologies as of Q2 2026.

Based on Arrowstreet Capital's 13F filing for Q2 2026, filed 13 Aug 2026.