Ken Griffin
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Ken Griffin’s SIGA Technologies SIGA Stock Holding History

Ken Griffin’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 		– Sell
-15,000
Closed -$91.7K – 14110
2025
Q4 		$91.7K Sell
15,000
-5,400
-26% -$38.4K ﹤0.01% 11708
2025
Q3 		$187K Buy
20,400
+3,800
+23% +$30.4K ﹤0.01% 11330
2025
Q2 		$108K Sell
16,600
-107,700
-87% -$646K ﹤0.01% 11274
2025
Q1 		$681K Sell
124,300
-39,300
-24% -$233K ﹤0.01% 7797
2024
Q4 		$983K Sell
163,600
-500
-0.3% -$3.34K ﹤0.01% 7058
2024
Q3 		$1.11M Buy
164,100
+23,700
+17% +$207K ﹤0.01% 6671
2024
Q2 		$1.07M Buy
140,400
+8,100
+6% +$66K ﹤0.01% 6456
2024
Q1 		$1.13M Buy
132,300
+26,300
+25% +$150K ﹤0.01% 6671
2023
Q4 		$594K Buy
106,000
+11,800
+13% +$63.2K ﹤0.01% 7716
2023
Q3 		$495K Buy
94,200
+48,400
+106% +$239K ﹤0.01% 8085
2023
Q2 		$231K Buy
45,800
+23,700
+107% +$135K ﹤0.01% 9570
2023
Q1 		$127K Sell
22,100
-25,300
-53% -$169K ﹤0.01% 10903
2022
Q4 		$349K Sell
47,400
-493,200
-91% -$4.32M ﹤0.01% 8983
2022
Q3 		$5.57M Buy
540,600
+403,400
+294% +$6.48M ﹤0.01% 3693
2022
Q2 		$1.59M Buy
+137,200
New +$1.24M ﹤0.01% 6024
2022
Q1 		– Sell
-11,600
Closed -$87K – 14479
2021
Q4 		$87K Sell
11,600
-7,700
-40% -$58.7K ﹤0.01% 12848
2021
Q3 		$143K Sell
19,300
-500
-3% -$3.2K ﹤0.01% 12433
2021
Q2 		$124K Buy
19,800
+800
+4% +$5.5K ﹤0.01% 12715
2021
Q1 		$124K Buy
+19,000
New +$129K ﹤0.01% 12260
2020
Q4 		– Sell
-16,900
Closed -$116K – 11471
2020
Q3 		$116K Buy
16,900
+4,800
+40% +$32.6K ﹤0.01% 9181
2020
Q2 		$72K Buy
+12,100
New +$69.1K ﹤0.01% 9144
2013
Q4 		– Sell
-12,000
Closed -$46K – 7153
2013
Q3 		$46K Buy
12,000
+3,700
+45% +$12.7K ﹤0.01% 5837
2013
Q2 		$24K Buy
+8,300
New +$27.8K ﹤0.01% 5994

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 $1.16B 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 $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
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

Ken Griffin's SIGA Position: Q1 2026 in Review

Ken Griffin reduced its SIGA Technologies (SIGA) stake by 32% in Q1 2026, selling an estimated $2.11M and leaving 705,137 shares worth $3.77M. The position accounts for ﹤0.01% of the portfolio, ranked #4823.

Ken Griffin first reported a position in SIGA in Q2 2013 and has held it in 34 quarters since. The position peaked at $10.3M in Q3 2025. 183 funds tracked by Wall St. Rank hold SIGA as of Q1 2026.

  • Ken Griffin held 705,137 shares of SIGA Technologies worth $3.77M as of Q1 2026.
  • Ken Griffin sold 337,946 SIGA Technologies shares in Q1 2026, an estimated $2.11M.
  • SIGA Technologies made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #4823 holding.
  • Ken Griffin first reported a position in SIGA Technologies in Q2 2013 and has held it in 34 quarters since.
  • Ken Griffin's SIGA Technologies position peaked at $10.3M in Q3 2025.
  • 183 funds tracked by Wall St. Rank held SIGA Technologies as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.