FRM
AMTM

Fox Run Management’s Amentum Holdings AMTM Stock Holding History

Fox Run 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 		$1.17M Buy
56,706
+22,767
+67% +$551K 0.19% 136
2026
Q1 		$854K Buy
33,939
+26,691
+368% +$838K 0.15% 232
2025
Q4 		$210K Buy
+7,248
New +$185K 0.03% 792

Other funds holding AMTM

AS
American Securities New York $3.75B AUM 23.12% 1-Year Est. Return
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 Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
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

Fox Run Management's AMTM Position: Q2 2026 in Review

Fox Run Management increased its Amentum Holdings (AMTM) stake by 67% in Q2 2026, buying an estimated $551K and bringing the position to 56,706 shares worth $1.17M. The position accounts for 0.19% of the portfolio, ranked #136.

Fox Run Management first reported a position in AMTM in Q4 2025 and has held it in 3 quarters since. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Fox Run Management held 56,706 shares of Amentum Holdings worth $1.17M as of Q2 2026.
  • Fox Run Management bought 22,767 Amentum Holdings shares in Q2 2026, an estimated $551K.
  • Amentum Holdings made up 0.19% of Fox Run Management's portfolio in Q2 2026, its #136 holding.
  • Fox Run Management first reported a position in Amentum Holdings in Q4 2025 and has held it in 3 quarters since.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Fox Run Management's 13F filing for Q2 2026, filed 4 Aug 2026.