Dimensional Fund Advisors
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Dimensional Fund Advisors’s SIGA Technologies SIGA Stock Holding History

Dimensional Fund Advisors’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 		$14.5M Buy
2,702,724
+165,930
+7% +$1.03M ﹤0.01% 2117
2025
Q4 		$15.5M Buy
2,536,794
+104,414
+4% +$743K ﹤0.01% 2104
2025
Q3 		$22.3M Buy
2,432,380
+24,901
+1% +$199K ﹤0.01% 1931
2025
Q2 		$15.7M Buy
2,407,479
+54,596
+2% +$327K ﹤0.01% 2074
2025
Q1 		$12.9M Buy
2,352,883
+226,818
+11% +$1.34M ﹤0.01% 2142
2024
Q4 		$12.8M Buy
2,126,065
+217,926
+11% +$1.46M ﹤0.01% 2201
2024
Q3 		$12.9M Buy
1,908,139
+86,351
+5% +$754K ﹤0.01% 2196
2024
Q2 		$13.8M Buy
1,821,788
+133,883
+8% +$1.09M ﹤0.01% 2119
2024
Q1 		$14.4M Sell
1,687,905
-10,249
-0.6% -$58.5K ﹤0.01% 2152
2023
Q4 		$9.51M Buy
1,698,154
+226,187
+15% +$1.21M ﹤0.01% 2341
2023
Q3 		$7.73M Buy
1,471,967
+336,905
+30% +$1.66M ﹤0.01% 2375
2023
Q2 		$5.73M Buy
1,135,062
+72,581
+7% +$413K ﹤0.01% 2473
2023
Q1 		$6.11M Sell
1,062,481
-42,941
-4% -$287K ﹤0.01% 2419
2022
Q4 		$8.14K Sell
1,105,422
-7,764
-0.7% -$68K ﹤0.01% 2288
2022
Q3 		$11.5M Sell
1,113,186
-24,846
-2% -$399K ﹤0.01% 2100
2022
Q2 		$13.2M Buy
1,138,032
+185,398
+19% +$1.67M ﹤0.01% 2083
2022
Q1 		$6.75M Buy
952,634
+44,801
+5% +$300K ﹤0.01% 2443
2021
Q4 		$6.83M Buy
907,833
+105,566
+13% +$804K ﹤0.01% 2460
2021
Q3 		$5.93M Buy
802,267
+109,042
+16% +$699K ﹤0.01% 2532
2021
Q2 		$4.35M Buy
693,225
+144,415
+26% +$992K ﹤0.01% 2656
2021
Q1 		$3.57M Buy
548,810
+35,749
+7% +$242K ﹤0.01% 2683
2020
Q4 		$3.73M Buy
513,061
+46,864
+10% +$330K ﹤0.01% 2626
2020
Q3 		$3.2M Buy
466,197
+17,075
+4% +$116K ﹤0.01% 2600
2020
Q2 		$2.65M Buy
449,122
+53,087
+13% +$303K ﹤0.01% 2669
2020
Q1 		$1.89M Buy
396,035
+61,075
+18% +$297K ﹤0.01% 2726
2019
Q4 		$1.6M Buy
334,960
+55,624
+20% +$283K ﹤0.01% 2910
2019
Q3 		$1.43M Buy
279,336
+65,036
+30% +$351K ﹤0.01% 2939
2019
Q2 		$1.22M Buy
214,300
+179,526
+516% +$994K ﹤0.01% 3016
2019
Q1 		$209K Hold
34,774
– – ﹤0.01% 3300
2018
Q4 		$274K Buy
+34,774
New +$199K ﹤0.01% 3237
2014
Q3 		– Sell
-700
Closed -$2K – 3565
2014
Q2 		$2K Hold
700
– – ﹤0.01% 3579
2014
Q1 		$2K Hold
700
– – ﹤0.01% 3585
2013
Q4 		$2K Hold
700
– – ﹤0.01% 3529
2013
Q3 		$3K Sell
700
-13,800
-95% -$47.2K ﹤0.01% 3563
2013
Q2 		$41K Buy
+14,500
New +$48.6K ﹤0.01% 3456

Other funds holding SIGA

BlackRock
BlackRock New York $5.72T AUM 30.48% 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 $2.9T AUM 29.55% 1-Year Est. Return
FWSM
First Wilshire Securities Management Pasadena, California $444M AUM 42.88% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $32.4B AUM 17.21% 1-Year Est. Return

Dimensional Fund Advisors's SIGA Position: Q1 2026 in Review

Dimensional Fund Advisors increased its SIGA Technologies (SIGA) stake by 6.5% in Q1 2026, buying an estimated $1.03M and bringing the position to 2,702,724 shares worth $14.5M. The position accounts for ﹤0.01% of the portfolio, ranked #2117.

Dimensional Fund Advisors first reported a position in SIGA in Q2 2013 and has held it in 35 quarters since. The position peaked at $22.3M in Q3 2025. 183 funds tracked by Wall St. Rank hold SIGA as of Q1 2026.

  • Dimensional Fund Advisors held 2,702,724 shares of SIGA Technologies worth $14.5M as of Q1 2026.
  • Dimensional Fund Advisors bought 165,930 SIGA Technologies shares in Q1 2026, an estimated $1.03M.
  • SIGA Technologies made up ﹤0.01% of Dimensional Fund Advisors's portfolio in Q1 2026, its #2117 holding.
  • Dimensional Fund Advisors first reported a position in SIGA Technologies in Q2 2013 and has held it in 35 quarters since.
  • Dimensional Fund Advisors's SIGA Technologies position peaked at $22.3M in Q3 2025.
  • 183 funds tracked by Wall St. Rank held SIGA Technologies as of Q1 2026.

Based on Dimensional Fund Advisors's 13F filing for Q1 2026, filed 7 May 2026.