State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s SIGA Technologies SIGA Stock Holding History

State of Wisconsin Investment Board’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 		$951K Sell
177,800
-37,516
-17% -$234K ﹤0.01% 1715
2025
Q4 		$1.32M Buy
215,316
+14
+0% +$100 ﹤0.01% 1556
2025
Q3 		$1.97M Sell
215,302
-38,200
-15% -$305K ﹤0.01% 1368
2025
Q2 		$1.65M Sell
253,502
-1,200
-0.5% -$7.2K ﹤0.01% 1382
2025
Q1 		$1.4M Sell
254,702
-48,203
-16% -$285K ﹤0.01% 1373
2024
Q4 		$1.82M Sell
302,905
-11,172
-4% -$74.7K ﹤0.01% 1319
2024
Q3 		$2.12M Buy
314,077
+3,300
+1% +$28.8K 0.01% 1286
2024
Q2 		$2.36M Buy
310,777
+167,657
+117% +$1.37M 0.01% 1219
2024
Q1 		$1.23M Buy
143,120
+50,077
+54% +$286K ﹤0.01% 1374
2023
Q4 		$521K Buy
93,043
+39,039
+72% +$209K ﹤0.01% 1710
2023
Q3 		$284K Buy
+54,004
New +$266K ﹤0.01% 2080
2023
Q2 		– Sell
-38,108
Closed -$219K – 2505
2023
Q1 		$219K Sell
38,108
-4,241
-10% -$28.3K ﹤0.01% 2225
2022
Q4 		$312K Sell
42,349
-2,843
-6% -$24.9K ﹤0.01% 2088
2022
Q3 		$465K Sell
45,192
-2,434
-5% -$39.1K ﹤0.01% 2014
2022
Q2 		$552K Sell
47,626
-16,274
-25% -$147K ﹤0.01% 2028
2022
Q1 		$453K Hold
63,900
– – ﹤0.01% 1974
2021
Q4 		$481K Buy
+63,900
New +$487K ﹤0.01% 1700
2021
Q2 		– Sell
-75,600
Closed -$491K – 2151
2021
Q1 		$491K Hold
75,600
– – ﹤0.01% 1605
2020
Q4 		$550K Sell
75,600
-9,400
-11% -$66.2K ﹤0.01% 1500
2020
Q3 		$584K Hold
85,000
– – ﹤0.01% 1423
2020
Q2 		$502K Hold
85,000
– – ﹤0.01% 1430
2020
Q1 		$406K Buy
85,000
+2,400
+3% +$11.7K ﹤0.01% 1402
2019
Q4 		$394K Hold
82,600
– – ﹤0.01% 1499
2019
Q3 		$423K Buy
82,600
+10,800
+15% +$58.2K ﹤0.01% 1379
2019
Q2 		$408K Buy
71,800
+1,600
+2% +$8.86K ﹤0.01% 1376
2019
Q1 		$422K Buy
70,200
+16,100
+30% +$108K ﹤0.01% 1386
2018
Q4 		$427K Hold
54,100
– – ﹤0.01% 1359
2018
Q3 		$373K Buy
+54,100
New +$397K ﹤0.01% 1444

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 $481B AUM 30.42% 1-Year Est. Return
AC
AltraVue Capital Bellevue, Washington $1.16B AUM 46.45% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
FWSM
First Wilshire Securities Management Pasadena, California $444M AUM 42.88% 1-Year Est. Return

State of Wisconsin Investment Board's SIGA Position: Q1 2026 in Review

State of Wisconsin Investment Board reduced its SIGA Technologies (SIGA) stake by 17% in Q1 2026, selling an estimated $234K and leaving 177,800 shares worth $951K. The position accounts for ﹤0.01% of the portfolio, ranked #1715.

State of Wisconsin Investment Board first reported a position in SIGA in Q3 2018 and has held it in 28 quarters since. The position peaked at $2.36M in Q2 2024. 183 funds tracked by Wall St. Rank hold SIGA as of Q1 2026.

  • State of Wisconsin Investment Board held 177,800 shares of SIGA Technologies worth $951K as of Q1 2026.
  • State of Wisconsin Investment Board sold 37,516 SIGA Technologies shares in Q1 2026, an estimated $234K.
  • SIGA Technologies made up ﹤0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #1715 holding.
  • State of Wisconsin Investment Board first reported a position in SIGA Technologies in Q3 2018 and has held it in 28 quarters since.
  • State of Wisconsin Investment Board's SIGA Technologies position peaked at $2.36M in Q2 2024.
  • 183 funds tracked by Wall St. Rank held SIGA Technologies as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.