BLC
AMTM

Brown, Lisle/Cummings’s Amentum Holdings AMTM Stock Holding History

Brown, Lisle/Cummings’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 		$3.18K Buy
122
+69
+130% +$2.17K ﹤0.01% 740
2025
Q4 		$1.54K Hold
53
– – ﹤0.01% 660
2025
Q3 		$1.27K Hold
53
– – ﹤0.01% 686
2025
Q2 		$1.25K Sell
53
-57
-52% -$1.19K ﹤0.01% 692
2025
Q1 		$2K Hold
110
– – ﹤0.01% 652
2024
Q4 		$2.31K Hold
110
– – ﹤0.01% 593
2024
Q3 		$3.55K Buy
+110
New +$3.13K ﹤0.01% 539

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

Brown, Lisle/Cummings's AMTM Position: Q1 2026 in Review

Brown, Lisle/Cummings increased its Amentum Holdings (AMTM) stake by 130% in Q1 2026, buying an estimated $2.17K and bringing the position to 122 shares worth $3.18K. The position accounts for ﹤0.01% of the portfolio, ranked #740.

Brown, Lisle/Cummings first reported a position in AMTM in Q3 2024 and has held it in 7 quarters since. The position peaked at $3.55K in Q3 2024. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Brown, Lisle/Cummings held 122 shares of Amentum Holdings worth $3.18K as of Q1 2026.
  • Brown, Lisle/Cummings bought 69 Amentum Holdings shares in Q1 2026, an estimated $2.17K.
  • Amentum Holdings made up ﹤0.01% of Brown, Lisle/Cummings's portfolio in Q1 2026, its #740 holding.
  • Brown, Lisle/Cummings first reported a position in Amentum Holdings in Q3 2024 and has held it in 7 quarters since.
  • Brown, Lisle/Cummings's Amentum Holdings position peaked at $3.55K in Q3 2024.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Brown, Lisle/Cummings's 13F filing for Q1 2026, filed 20 Apr 2026.