Vanguard Portfolio Management
AMTM

Vanguard Portfolio Management’s Amentum Holdings AMTM Stock Holding History

Vanguard Portfolio Management’s Portfolio AMTM Stock Details AMTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$164M Buy
7,948,385
+95,434
+1% +$2.31M 0.01% 1309
2026
Q1 		$205M Buy
+7,852,951
New +$246M 0.01% 1137

Other funds holding AMTM

Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return
TCA
Troluce Capital Advisors Dorado, Puerto Rico $971M AUM 2.27% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

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

Vanguard Portfolio Management increased its Amentum Holdings (AMTM) stake by 1.2% in Q2 2026, buying an estimated $2.31M and bringing the position to 7,948,385 shares worth $164M. The position accounts for 0.01% of the portfolio, ranked #1309.

Vanguard Portfolio Management first reported a position in AMTM in Q1 2026 and has held it in 2 quarters since. The position peaked at $205M in Q1 2026. 455 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Vanguard Portfolio Management held 7,948,385 shares of Amentum Holdings worth $164M as of Q2 2026.
  • Vanguard Portfolio Management bought 95,434 Amentum Holdings shares in Q2 2026, an estimated $2.31M.
  • Amentum Holdings made up 0.01% of Vanguard Portfolio Management's portfolio in Q2 2026, its #1309 holding.
  • Vanguard Portfolio Management first reported a position in Amentum Holdings in Q1 2026 and has held it in 2 quarters since.
  • Vanguard Portfolio Management's Amentum Holdings position peaked at $205M in Q1 2026.
  • 455 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

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