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
2025 Q1	–	Sell	-13,700	Closed	-$82.3K	–	10504
2024 Q4	$82.3K	Sell	13,700 -8,600	-39%	-$57.5K	﹤0.01%	8829
2024 Q3	$151K	Buy	+22,300	New	+$195K	﹤0.01%	8815
2024 Q2	–	Sell	-41,400	Closed	-$354K	–	10119
2024 Q1	$354K	Buy	+41,400	New	+$236K	﹤0.01%	7288
2023 Q1	–	Sell	-158,800	Closed	-$1.17M	–	9832
2022 Q4	$1.17M	Sell	158,800 -351,300	-69%	-$3.08M	﹤0.01%	4737
2022 Q3	$5.25M	Sell	510,100 -26,400	-5%	-$424K	﹤0.01%	2542
2022 Q2	$6.21M	Buy	+536,500	New	+$4.83M	﹤0.01%	2346
2022 Q1	–	Sell	-17,700	Closed	-$133K	–	10954
2021 Q4	$133K	Buy	+17,700	New	+$135K	﹤0.01%	9081

Other funds holding SIGA

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

AltraVue Capital Bellevue, Washington $1.16B AUM 46.45% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

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.