NSIM
AMTM

North Star Investment Management’s Amentum Holdings AMTM Stock Holding History

North Star Investment 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 		– Sell
-39
Closed -$1.13K – 1809
2025
Q4 		$1.13K Hold
39
– – ﹤0.01% 1378
2025
Q3 		$934 Hold
39
– – ﹤0.01% 1173
2025
Q2 		$921 Buy
+39
New +$815 ﹤0.01% 1140
2025
Q1 		– Sell
-650
Closed -$13.7K – 1262
2024
Q4 		$13.7K Hold
650
– – ﹤0.01% 811
2024
Q3 		$21K Buy
+650
New +$18.5K ﹤0.01% 723

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 $6.73T AUM 46.02% 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 $3.37T AUM 44.26% 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 $552B AUM 44.19% 1-Year Est. Return

North Star Investment Management's AMTM Position: Q1 2026 in Review

North Star Investment Management sold out of Amentum Holdings (AMTM) in Q1 2026, closing a stake of 39 shares — an estimated $1.13K sold.

North Star Investment Management first reported a position in AMTM in Q3 2024 and held it in 5 quarters. The position peaked at $21K in Q3 2024. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • North Star Investment Management reported no remaining Amentum Holdings position as of Q1 2026 after selling out during the quarter.
  • North Star Investment Management sold 39 Amentum Holdings shares in Q1 2026, an estimated $1.13K.
  • North Star Investment Management first reported a position in Amentum Holdings in Q3 2024 and held it in 5 quarters.
  • North Star Investment Management's Amentum Holdings position peaked at $21K in Q3 2024.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on North Star Investment Management's 13F filing for Q1 2026, filed 23 Apr 2026.