Jane Street
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Jane Street’s SIGA Technologies SIGA Stock Holding History

Jane Street’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
2023
Q1 		– Sell
-28,600
Closed -$210K – 9833
2022
Q4 		$210K Sell
28,600
-120,100
-81% -$1.05M ﹤0.01% 7599
2022
Q3 		$1.53M Sell
148,700
-84,700
-36% -$1.36M ﹤0.01% 4646
2022
Q2 		$2.7M Buy
+233,400
New +$2.1M ﹤0.01% 3625

Other funds holding SIGA

BlackRock
BlackRock New York $5.72T AUM 30.48% 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 $2.9T AUM 29.55% 1-Year Est. Return
FWSM
First Wilshire Securities Management Pasadena, California $444M AUM 42.88% 1-Year Est. Return

Jane Street's SIGA Position: Q1 2026 in Review

Jane Street reduced its SIGA Technologies (SIGA) stake by 57% in Q1 2026, selling an estimated $429K and leaving 52,080 shares worth $279K. The position accounts for ﹤0.01% of the portfolio, ranked #9384.

Jane Street first reported a position in SIGA in Q2 2013 and has held it in 23 quarters since. The position peaked at $1.43M in Q2 2022. 183 funds tracked by Wall St. Rank hold SIGA as of Q1 2026.

  • Jane Street held 52,080 shares of SIGA Technologies worth $279K as of Q1 2026.
  • Jane Street sold 68,778 SIGA Technologies shares in Q1 2026, an estimated $429K.
  • SIGA Technologies made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #9384 holding.
  • Jane Street first reported a position in SIGA Technologies in Q2 2013 and has held it in 23 quarters since.
  • Jane Street's SIGA Technologies position peaked at $1.43M in Q2 2022.
  • 183 funds tracked by Wall St. Rank held SIGA Technologies as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.