MIM
AMTM

Marco Investment Management’s Amentum Holdings AMTM Stock Holding History

Marco Investment 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 		$649K Buy
+31,391
New +$759K 0.04% 144
2025
Q3 		– Sell
-25,157
Closed -$594K – 229
2025
Q2 		$594K Sell
25,157
-4,088
-14% -$85.4K 0.05% 137
2025
Q1 		$532K Sell
29,245
-6,730
-19% -$137K 0.05% 140
2024
Q4 		$757K Sell
35,975
-2,310
-6% -$59.7K 0.07% 123
2024
Q3 		$1.23M Buy
+38,285
New +$1.09M 0.11% 111

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

Marco Investment Management's AMTM Position: Q2 2026 in Review

Marco Investment Management opened a new position in Amentum Holdings (AMTM) in Q2 2026: 31,391 shares worth $649K. The stake represents 0.04% of the portfolio and ranks #144 among its holdings. This is a return to the name: Marco Investment Management previously reported a position in AMTM as recently as Q2 2025.

Marco Investment Management first reported a position in AMTM in Q3 2024 and has held it in 5 quarters since. The position peaked at $1.23M in Q3 2024. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Marco Investment Management held 31,391 shares of Amentum Holdings worth $649K as of Q2 2026.
  • Amentum Holdings was a new Marco Investment Management position in Q2 2026.
  • Amentum Holdings made up 0.04% of Marco Investment Management's portfolio in Q2 2026, its #144 holding.
  • Marco Investment Management first reported a position in Amentum Holdings in Q3 2024 and has held it in 5 quarters since.
  • Marco Investment Management's Amentum Holdings position peaked at $1.23M in Q3 2024.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Marco Investment Management's 13F filing for Q2 2026, filed 3 Aug 2026.