CCPM
AMTM

Cooper Creek Partners Management’s Amentum Holdings AMTM Stock Holding History

Cooper Creek Partners 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 		$24.2M Sell
929,334
-623,740
-40% -$19.6M 0.83% 45
2025
Q4 		$45M Buy
+1,553,074
New +$39.7M 2.03% 16
2025
Q2 		– Sell
-1,223,986
Closed -$22.3M – 127
2025
Q1 		$22.3M Sell
1,223,986
-2,933,048
-71% -$59.7M 0.68% 48
2024
Q4 		$87.4M Buy
4,157,034
+3,319,364
+396% +$85.8M 2.7% 10
2024
Q3 		$27M Buy
+837,670
New +$23.9M 0.74% 49

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

Cooper Creek Partners Management's AMTM Position: Q1 2026 in Review

Cooper Creek Partners Management reduced its Amentum Holdings (AMTM) stake by 40% in Q1 2026, selling an estimated $19.6M and leaving 929,334 shares worth $24.2M. The position accounts for 0.83% of the portfolio, ranked #45.

Cooper Creek Partners Management first reported a position in AMTM in Q3 2024 and has held it in 5 quarters since. The position peaked at $87.4M in Q4 2024. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Cooper Creek Partners Management held 929,334 shares of Amentum Holdings worth $24.2M as of Q1 2026.
  • Cooper Creek Partners Management sold 623,740 Amentum Holdings shares in Q1 2026, an estimated $19.6M.
  • Amentum Holdings made up 0.83% of Cooper Creek Partners Management's portfolio in Q1 2026, its #45 holding.
  • Cooper Creek Partners Management first reported a position in Amentum Holdings in Q3 2024 and has held it in 5 quarters since.
  • Cooper Creek Partners Management's Amentum Holdings position peaked at $87.4M in Q4 2024.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Cooper Creek Partners Management's 13F filing for Q1 2026, filed 15 May 2026.