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
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 $3.93B 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

CSM Advisors's AMTM Position: Q1 2026 in Review

CSM Advisors reduced its Amentum Holdings (AMTM) stake by 4.2% in Q1 2026, selling an estimated $110K and leaving 81,241 shares worth $2.12M. The position accounts for 0.05% of the portfolio, ranked #303.

CSM Advisors first reported a position in AMTM in Q3 2024 and has held it in 7 quarters since. The position peaked at $14.9M in Q2 2025. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • CSM Advisors held 81,241 shares of Amentum Holdings worth $2.12M as of Q1 2026.
  • CSM Advisors sold 3,518 Amentum Holdings shares in Q1 2026, an estimated $110K.
  • Amentum Holdings made up 0.05% of CSM Advisors's portfolio in Q1 2026, its #303 holding.
  • CSM Advisors first reported a position in Amentum Holdings in Q3 2024 and has held it in 7 quarters since.
  • CSM Advisors's Amentum Holdings position peaked at $14.9M in Q2 2025.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on CSM Advisors's 13F filing for Q1 2026, filed 15 May 2026.