HF
AMTM

HRT Financial’s Amentum Holdings AMTM Stock Holding History

HRT Financial’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 		$13.9M Buy
+671,847
New +$16.2M 0.03% 622
2025
Q4 		– Sell
-186,223
Closed -$4.46M – 4251
2025
Q3 		$4.46M Buy
+186,223
New +$4.53M 0.02% 723

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

HRT Financial's AMTM Position: Q2 2026 in Review

HRT Financial opened a new position in Amentum Holdings (AMTM) in Q2 2026: 671,847 shares worth $13.9M. The stake represents 0.03% of the portfolio and ranks #622 among its holdings. This is a return to the name: HRT Financial previously reported a position in AMTM as recently as Q3 2025.

HRT Financial first reported a position in AMTM in Q3 2025 and has held it in 2 quarters since. 464 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • HRT Financial held 671,847 shares of Amentum Holdings worth $13.9M as of Q2 2026.
  • Amentum Holdings was a new HRT Financial position in Q2 2026.
  • Amentum Holdings made up 0.03% of HRT Financial's portfolio in Q2 2026, its #622 holding.
  • HRT Financial first reported a position in Amentum Holdings in Q3 2025 and has held it in 2 quarters since.
  • 464 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on HRT Financial's 13F filing for Q2 2026, filed 14 Aug 2026.