Vanguard Portfolio Management
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Vanguard Portfolio Management’s SIGA Technologies SIGA Stock Holding History

Vanguard Portfolio Management’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 		$2M Sell
549,697
-37,277
-6% -$167K ﹤0.01% 2734
2026
Q1 		$3.14M Buy
+586,974
New +$3.66M ﹤0.01% 2462

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 53.78% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
Geode Capital Management
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
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

Vanguard Portfolio Management's SIGA Position: Q2 2026 in Review

Vanguard Portfolio Management reduced its SIGA Technologies (SIGA) stake by 6.4% in Q2 2026, selling an estimated $167K and leaving 549,697 shares worth $2M. The position accounts for ﹤0.01% of the portfolio, ranked #2734.

Vanguard Portfolio Management first reported a position in SIGA in Q1 2026 and has held it in 2 quarters since. The position peaked at $3.14M in Q1 2026. 160 funds tracked by Wall St. Rank hold SIGA as of Q2 2026.

  • Vanguard Portfolio Management held 549,697 shares of SIGA Technologies worth $2M as of Q2 2026.
  • Vanguard Portfolio Management sold 37,277 SIGA Technologies shares in Q2 2026, an estimated $167K.
  • SIGA Technologies made up ﹤0.01% of Vanguard Portfolio Management's portfolio in Q2 2026, its #2734 holding.
  • Vanguard Portfolio Management first reported a position in SIGA Technologies in Q1 2026 and has held it in 2 quarters since.
  • Vanguard Portfolio Management's SIGA Technologies position peaked at $3.14M in Q1 2026.
  • 160 funds tracked by Wall St. Rank held SIGA Technologies as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.