SEI Investments’s SIGA Technologies SIGA Stock Holding History

SEI Investments’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	$104K	Sell	28,520 -19,900	-41%	-$89.1K	﹤0.01%	3177
2026 Q1	$259K	Buy	48,420 +23,400	+94%	+$146K	﹤0.01%	2874
2025 Q4	$153K	Sell	25,020 -5,402	-18%	-$38.4K	﹤0.01%	2963
2025 Q3	$278K	Buy	30,422 +2	+0%	+$16	﹤0.01%	2494
2025 Q2	$198K	Sell	30,420 -7,900	-21%	-$47.4K	﹤0.01%	2568
2025 Q1	$210K	Buy	+38,320	New	+$227K	﹤0.01%	2460
2024 Q3	–	Sell	-29,645	Closed	-$225K	–	2753
2024 Q2	$225K	Sell	29,645 -9,800	-25%	-$79.8K	﹤0.01%	2424
2024 Q1	$338K	Hold	39,445	–	–	﹤0.01%	2257
2023 Q4	$221K	Buy	39,445 +21,000	+114%	+$112K	﹤0.01%	2414
2023 Q3	$96.8K	Buy	+18,445	New	+$90.9K	﹤0.01%	2519

Other funds holding SIGA

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

AltraVue Capital Bellevue, Washington $1.39B AUM 53.77% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return

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 Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

SEI Investments's SIGA Position: Q2 2026 in Review

SEI Investments reduced its SIGA Technologies (SIGA) stake by 41% in Q2 2026, selling an estimated $89.1K and leaving 28,520 shares worth $104K. The position accounts for ﹤0.01% of the portfolio, ranked #3177.

SEI Investments first reported a position in SIGA in Q3 2023 and has held it in 10 quarters since. The position peaked at $338K in Q1 2024. 161 funds tracked by Wall St. Rank hold SIGA as of Q2 2026.

SEI Investments held 28,520 shares of SIGA Technologies worth $104K as of Q2 2026.
SEI Investments sold 19,900 SIGA Technologies shares in Q2 2026, an estimated $89.1K.
SIGA Technologies made up ﹤0.01% of SEI Investments's portfolio in Q2 2026, its #3177 holding.
SEI Investments first reported a position in SIGA Technologies in Q3 2023 and has held it in 10 quarters since.
SEI Investments's SIGA Technologies position peaked at $338K in Q1 2024.
161 funds tracked by Wall St. Rank held SIGA Technologies as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.