CA
AMTM

CSM Advisors’s Amentum Holdings AMTM Stock Holding History

CSM Advisors’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 		$5.04M Buy
243,814
+162,573
+200% +$3.93M 0.11% 224
2026
Q1 		$2.12M Sell
81,241
-3,518
-4% -$110K 0.05% 303
2025
Q4 		$2.46M Sell
84,759
-118,048
-58% -$3.02M 0.07% 257
2025
Q3 		$4.86M Sell
202,807
-430,241
-68% -$10.5M 0.14% 175
2025
Q2 		$14.9M Sell
633,048
-5,009
-0.8% -$105K 0.44% 65
2025
Q1 		$11.6M Sell
638,057
-1,000
-0.2% -$20.4K 0.63% 38
2024
Q4 		$13.4M Buy
639,057
+553,435
+646% +$14.3M 0.63% 37
2024
Q3 		$2.2M Buy
+85,622
New +$2.44M 0.14% 95

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 $3.37T AUM 44.26% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return

CSM Advisors's AMTM Position: Q2 2026 in Review

CSM Advisors increased its Amentum Holdings (AMTM) stake by 200% in Q2 2026, buying an estimated $3.93M and bringing the position to 243,814 shares worth $5.04M. The position accounts for 0.11% of the portfolio, ranked #224.

CSM Advisors first reported a position in AMTM in Q3 2024 and has held it in 8 quarters since. The position peaked at $14.9M in Q2 2025. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • CSM Advisors held 243,814 shares of Amentum Holdings worth $5.04M as of Q2 2026.
  • CSM Advisors bought 162,573 Amentum Holdings shares in Q2 2026, an estimated $3.93M.
  • Amentum Holdings made up 0.11% of CSM Advisors's portfolio in Q2 2026, its #224 holding.
  • CSM Advisors first reported a position in Amentum Holdings in Q3 2024 and has held it in 8 quarters since.
  • CSM Advisors's Amentum Holdings position peaked at $14.9M in Q2 2025.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on CSM Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.