Acadian Asset Management
AMTM

Acadian Asset Management’s Amentum Holdings AMTM Stock Holding History

Acadian Asset 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
Q1 		$155K Sell
5,957
-2,242
-27% -$70.4K ﹤0.01% 1647
2025
Q4 		$237K Buy
+8,199
New +$210K ﹤0.01% 1487

Other funds holding AMTM

AS
American Securities New York $3.93B AUM 52.22% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $9.73B AUM 55.65% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Acadian Asset Management's AMTM Position: Q1 2026 in Review

Acadian Asset Management reduced its Amentum Holdings (AMTM) stake by 27% in Q1 2026, selling an estimated $70.4K and leaving 5,957 shares worth $155K. The position accounts for ﹤0.01% of the portfolio, ranked #1647.

Acadian Asset Management first reported a position in AMTM in Q4 2025 and has held it in 2 quarters since. The position peaked at $237K in Q4 2025. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Acadian Asset Management held 5,957 shares of Amentum Holdings worth $155K as of Q1 2026.
  • Acadian Asset Management sold 2,242 Amentum Holdings shares in Q1 2026, an estimated $70.4K.
  • Amentum Holdings made up ﹤0.01% of Acadian Asset Management's portfolio in Q1 2026, its #1647 holding.
  • Acadian Asset Management first reported a position in Amentum Holdings in Q4 2025 and has held it in 2 quarters since.
  • Acadian Asset Management's Amentum Holdings position peaked at $237K in Q4 2025.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Acadian Asset Management's 13F filing for Q1 2026, filed 13 May 2026.