Teacher Retirement System of Texas
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Teacher Retirement System of Texas’s SIGA Technologies SIGA Stock Holding History

Teacher Retirement System of Texas’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
2025
Q4 		– Sell
-10,441
Closed -$95.5K – 1950
2025
Q3 		$95.5K Sell
10,441
-1,113
-10% -$8.9K ﹤0.01% 1992
2025
Q2 		$75.3K Buy
11,554
+24
+0.2% +$144 ﹤0.01% 2030
2025
Q1 		$63.2K Sell
11,530
-1,299
-10% -$7.69K ﹤0.01% 2042
2024
Q4 		$77K Buy
12,829
+2,126
+20% +$14.2K ﹤0.01% 1527
2024
Q3 		$72K Buy
+10,703
New +$93.4K ﹤0.01% 1477
2023
Q4 		– Sell
-11,188
Closed -$59K – 1915
2023
Q3 		$59K Buy
11,188
+402
+4% +$1.98K ﹤0.01% 1851
2023
Q2 		$54K Sell
10,786
-2,711
-20% -$15.4K ﹤0.01% 1904
2023
Q1 		$78K Sell
13,497
-60,063
-82% -$401K ﹤0.01% 2002
2022
Q4 		$541K Buy
73,560
+566
+0.8% +$4.96K ﹤0.01% 1439
2022
Q3 		$752K Sell
72,994
-144,168
-66% -$2.32M 0.01% 1317
2022
Q2 		$2.52M Buy
217,162
+155,288
+251% +$1.4M 0.02% 555
2022
Q1 		$439K Sell
61,874
-29,767
-32% -$199K ﹤0.01% 1478
2021
Q4 		$689K Buy
+91,641
New +$698K ﹤0.01% 1279

Other funds holding SIGA

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 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
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
JAM
Jupiter Asset Management London, United Kingdom $18.8B AUM 29.2% 1-Year Est. Return

Teacher Retirement System of Texas's SIGA Position: Q4 2025 in Review

Teacher Retirement System of Texas sold out of SIGA Technologies (SIGA) in Q4 2025, closing a stake of 10,441 shares — an estimated $95.5K sold.

Teacher Retirement System of Texas first reported a position in SIGA in Q4 2021 and held it in 13 quarters. The position peaked at $2.52M in Q2 2022. 200 funds tracked by Wall St. Rank hold SIGA as of Q4 2025.

  • Teacher Retirement System of Texas reported no remaining SIGA Technologies position as of Q4 2025 after selling out during the quarter.
  • Teacher Retirement System of Texas sold 10,441 SIGA Technologies shares in Q4 2025, an estimated $95.5K.
  • Teacher Retirement System of Texas first reported a position in SIGA Technologies in Q4 2021 and held it in 13 quarters.
  • Teacher Retirement System of Texas's SIGA Technologies position peaked at $2.52M in Q2 2022.
  • 200 funds tracked by Wall St. Rank held SIGA Technologies as of Q4 2025.

Based on Teacher Retirement System of Texas's 13F filing for Q4 2025, filed 28 Jan 2026.