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Jeff Yass’s SIGA Technologies SIGA Stock Holding History

Jeff Yass’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 		$90.3K Buy
+24,800
New +$111K ﹤0.01% 12564
2025
Q1 		– Sell
-143,000
Closed -$859K – 13369
2024
Q4 		$859K Sell
143,000
-143,900
-50% -$962K ﹤0.01% 7341
2024
Q3 		$1.94M Buy
286,900
+131,700
+85% +$1.15M ﹤0.01% 5333
2024
Q2 		$1.18M Sell
155,200
-33,300
-18% -$271K ﹤0.01% 6196
2024
Q1 		$1.61M Buy
188,500
+67,600
+56% +$386K ﹤0.01% 5825
2023
Q4 		$677K Sell
120,900
-44,300
-27% -$237K ﹤0.01% 7925
2023
Q3 		$867K Buy
165,200
+33,300
+25% +$164K ﹤0.01% 6941
2023
Q2 		$666K Buy
131,900
+79,100
+150% +$450K ﹤0.01% 7637
2023
Q1 		$304K Buy
52,800
+22,300
+73% +$149K ﹤0.01% 9691
2022
Q4 		$224K Sell
30,500
-110,600
-78% -$969K ﹤0.01% 9835
2022
Q3 		$1.45M Buy
141,100
+68,600
+95% +$1.1M ﹤0.01% 5681
2022
Q2 		$840K Buy
72,500
+48,500
+202% +$437K ﹤0.01% 6957
2022
Q1 		$170K Sell
24,000
-12,100
-34% -$81K ﹤0.01% 11432
2021
Q4 		$271K Buy
36,100
+17,100
+90% +$130K ﹤0.01% 10726
2021
Q3 		$140K Buy
+19,000
New +$122K ﹤0.01% 11842
2014
Q3 		– Sell
-13,200
Closed -$37K – 9897
2014
Q2 		$37K Sell
13,200
-10,300
-44% -$28.9K ﹤0.01% 9642
2014
Q1 		$73K Buy
23,500
+3,300
+16% +$10.9K ﹤0.01% 8644
2013
Q4 		$66K Sell
20,200
-22,300
-52% -$75.3K ﹤0.01% 8742
2013
Q3 		$163K Buy
42,500
+8,800
+26% +$30.1K ﹤0.01% 7883
2013
Q2 		$96K Buy
+33,700
New +$113K ﹤0.01% 7801

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 53.78% 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
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 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

Jeff Yass's SIGA Position: Q2 2026 in Review

Jeff Yass increased its SIGA Technologies (SIGA) stake by 115% in Q2 2026, buying an estimated $128K and bringing the position to 53,314 shares worth $194K. The position accounts for ﹤0.01% of the portfolio, ranked #11986.

Jeff Yass first reported a position in SIGA in Q2 2013 and has held it in 33 quarters since. The position peaked at $615K in Q2 2023. 160 funds tracked by Wall St. Rank hold SIGA as of Q2 2026.

  • Jeff Yass held 53,314 shares of SIGA Technologies worth $194K as of Q2 2026.
  • Jeff Yass bought 28,547 SIGA Technologies shares in Q2 2026, an estimated $128K.
  • SIGA Technologies made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #11986 holding.
  • Jeff Yass first reported a position in SIGA Technologies in Q2 2013 and has held it in 33 quarters since.
  • Jeff Yass's SIGA Technologies position peaked at $615K in Q2 2023.
  • 160 funds tracked by Wall St. Rank held SIGA Technologies as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.