Fidelity Investments
AMTM

Fidelity Investments’s Amentum Holdings AMTM Stock Holding History

Fidelity 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 		$117M Buy
5,679,175
+100,789
+2% +$2.44M 0.01% 1177
2026
Q1 		$145M Sell
5,578,386
-1,128,918
-17% -$35.4M 0.01% 1008
2025
Q4 		$195M Buy
6,707,304
+472,055
+8% +$12.1M 0.01% 875
2025
Q3 		$149M Buy
6,235,249
+1,661,319
+36% +$40.4M 0.01% 989
2025
Q2 		$108M Buy
4,573,930
+164,981
+4% +$3.45M 0.01% 1083
2025
Q1 		$80.2M Buy
4,408,949
+2,013,896
+84% +$41M 0.01% 1179
2024
Q4 		$50.4M Buy
2,395,053
+2,315,738
+2,920% +$59.9M ﹤0.01% 1380
2024
Q3 		$2.56M Buy
+79,315
New +$2.26M ﹤0.01% 2329

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
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

Fidelity Investments's AMTM Position: Q2 2026 in Review

Fidelity Investments increased its Amentum Holdings (AMTM) stake by 1.8% in Q2 2026, buying an estimated $2.44M and bringing the position to 5,679,175 shares worth $117M. The position accounts for 0.01% of the portfolio, ranked #1177.

Fidelity Investments first reported a position in AMTM in Q3 2024 and has held it in 8 quarters since. The position peaked at $195M in Q4 2025. 460 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Fidelity Investments held 5,679,175 shares of Amentum Holdings worth $117M as of Q2 2026.
  • Fidelity Investments bought 100,789 Amentum Holdings shares in Q2 2026, an estimated $2.44M.
  • Amentum Holdings made up 0.01% of Fidelity Investments's portfolio in Q2 2026, its #1177 holding.
  • Fidelity Investments first reported a position in Amentum Holdings in Q3 2024 and has held it in 8 quarters since.
  • Fidelity Investments's Amentum Holdings position peaked at $195M in Q4 2025.
  • 460 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

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