ACM
AMTM

Arvin Capital Management’s Amentum Holdings AMTM Stock Holding History

Arvin Capital 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 		– Sell
-150,000
Closed -$3.91M – 79
2026
Q1 		$3.91M Buy
+150,000
New +$4.71M 0.48% 43

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

Arvin Capital Management's AMTM Position: Q2 2026 in Review

Arvin Capital Management reduced its Amentum Holdings (AMTM) stake by 80% in Q2 2026, selling an estimated $40M and leaving 416,705 shares worth $8.61M. The position accounts for 1.12% of the portfolio, ranked #35.

Arvin Capital Management first reported a position in AMTM in Q4 2024 and has held it in 7 quarters since. The position peaked at $54M in Q1 2026. 460 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Arvin Capital Management held 416,705 shares of Amentum Holdings worth $8.61M as of Q2 2026.
  • Arvin Capital Management sold 1,654,495 Amentum Holdings shares in Q2 2026, an estimated $40M.
  • Amentum Holdings made up 1.12% of Arvin Capital Management's portfolio in Q2 2026, its #35 holding.
  • Arvin Capital Management first reported a position in Amentum Holdings in Q4 2024 and has held it in 7 quarters since.
  • Arvin Capital Management's Amentum Holdings position peaked at $54M in Q1 2026.
  • 460 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Arvin Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.