Wellington Management Group
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Wellington Management Group’s SIGA Technologies SIGA Stock Holding History

Wellington Management Group’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
-127,969
Closed -$782K – 1992
2025
Q4 		$782K Sell
127,969
-15,137
-11% -$108K ﹤0.01% 1759
2025
Q3 		$1.31M Sell
143,106
-63,223
-31% -$505K ﹤0.01% 1723
2025
Q2 		$1.35M Buy
206,329
+24,001
+13% +$144K ﹤0.01% 1667
2025
Q1 		$999K Buy
182,328
+62,103
+52% +$368K ﹤0.01% 1709
2024
Q4 		$723K Buy
120,225
+8,028
+7% +$53.7K ﹤0.01% 1780
2024
Q3 		$757K Buy
+112,197
New +$980K ﹤0.01% 1760

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 53.77% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 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 $287B AUM 42.33% 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 $486M AUM 50.29% 1-Year Est. Return

Wellington Management Group's SIGA Position: Q1 2026 in Review

Wellington Management Group sold out of SIGA Technologies (SIGA) in Q1 2026, closing a stake of 127,969 shares — an estimated $782K sold.

Wellington Management Group first reported a position in SIGA in Q3 2024 and held it in 6 quarters. The position peaked at $1.35M in Q2 2025. 183 funds tracked by Wall St. Rank hold SIGA as of Q1 2026.

  • Wellington Management Group reported no remaining SIGA Technologies position as of Q1 2026 after selling out during the quarter.
  • Wellington Management Group sold 127,969 SIGA Technologies shares in Q1 2026, an estimated $782K.
  • Wellington Management Group first reported a position in SIGA Technologies in Q3 2024 and held it in 6 quarters.
  • Wellington Management Group's SIGA Technologies position peaked at $1.35M in Q2 2025.
  • 183 funds tracked by Wall St. Rank held SIGA Technologies as of Q1 2026.

Based on Wellington Management Group's 13F filing for Q1 2026, filed 15 May 2026.