CSM Advisors
AMTM icon

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
Q3 		$7.02M Buy
387,362
+143,548
+59% +$3.01M 0.15% 154
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

American Securities
American Securities New York $2.69B AUM 8.08% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.27T AUM 50.62% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $161B AUM 86.05% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Thompson Siegel & Walmsley
Thompson Siegel & Walmsley Richmond, Virginia $5.37B AUM 3.99% 1-Year Est. Return

CSM Advisors's AMTM Position: Q3 2026 in Review

CSM Advisors increased its Amentum Holdings (AMTM) stake by 59% in Q3 2026, buying an estimated $3.01M and bringing the position to 387,362 shares worth $7.02M. The position accounts for 0.15% of the portfolio, ranked #154.

CSM Advisors first reported a position in AMTM in Q3 2024 and has held it in 9 quarters since. The position peaked at $14.9M in Q2 2025. 360 funds tracked by Wall St. Rank hold AMTM as of Q3 2026.

  • CSM Advisors held 387,362 shares of Amentum Holdings worth $7.02M as of Q3 2026.
  • CSM Advisors bought 143,548 Amentum Holdings shares in Q3 2026, an estimated $3.01M.
  • Amentum Holdings made up 0.15% of CSM Advisors's portfolio in Q3 2026, its #154 holding.
  • CSM Advisors first reported a position in Amentum Holdings in Q3 2024 and has held it in 9 quarters since.
  • CSM Advisors's Amentum Holdings position peaked at $14.9M in Q2 2025.
  • 360 funds tracked by Wall St. Rank held Amentum Holdings as of Q3 2026.

Based on CSM Advisors's 13F filing for Q3 2026, filed 13 Nov 2026.