HI
AMTM

Harbour Investments’s Amentum Holdings AMTM Stock Holding History

Harbour Investments’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 		$17.7K Sell
858
-34
-4% -$822 ﹤0.01% 3025
2026
Q1 		$23.3K Buy
892
+890
+44,500% +$27.9K ﹤0.01% 2790
2025
Q4 		$58 Sell
2
-29
-94% -$741 ﹤0.01% 3777
2025
Q3 		$742 Sell
31
-248
-89% -$6.04K ﹤0.01% 3458
2025
Q2 		$6.59K Buy
279
+251
+896% +$5.25K ﹤0.01% 2760
2025
Q1 		$510 Hold
28
– – ﹤0.01% 3337
2024
Q4 		$589 Hold
28
– – ﹤0.01% 3254
2024
Q3 		$903 Buy
+28
New +$798 ﹤0.01% 3109

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 $3.38T AUM 44.17% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return

Harbour Investments's AMTM Position: Q2 2026 in Review

Harbour Investments reduced its Amentum Holdings (AMTM) stake by 3.8% in Q2 2026, selling an estimated $822 and leaving 858 shares worth $17.7K. The position accounts for ﹤0.01% of the portfolio, ranked #3025.

Harbour Investments first reported a position in AMTM in Q3 2024 and has held it in 8 quarters since. The position peaked at $23.3K in Q1 2026. 464 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Harbour Investments held 858 shares of Amentum Holdings worth $17.7K as of Q2 2026.
  • Harbour Investments sold 34 Amentum Holdings shares in Q2 2026, an estimated $822.
  • Amentum Holdings made up ﹤0.01% of Harbour Investments's portfolio in Q2 2026, its #3025 holding.
  • Harbour Investments first reported a position in Amentum Holdings in Q3 2024 and has held it in 8 quarters since.
  • Harbour Investments's Amentum Holdings position peaked at $23.3K in Q1 2026.
  • 464 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Harbour Investments's 13F filing for Q2 2026, filed 12 Aug 2026.