YIH
AMTM

Y-Intercept (HK)’s Amentum Holdings AMTM Stock Holding History

Y-Intercept (HK)’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
-10,497
Closed -$304K – 2144
2025
Q4 		$304K Buy
+10,497
New +$268K 0.01% 1369
2025
Q3 		– Sell
-198,726
Closed -$4.69M – 2151
2025
Q2 		$4.69M Buy
+198,726
New +$4.15M 0.11% 244
2025
Q1 		– Sell
-61,268
Closed -$1.29M – 1681
2024
Q4 		$1.29M Buy
61,268
+53,898
+731% +$1.39M 0.09% 332
2024
Q3 		$238K Buy
+7,370
New +$210K 0.01% 1097

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
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
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Y-Intercept (HK)'s AMTM Position: Q1 2026 in Review

Y-Intercept (HK) sold out of Amentum Holdings (AMTM) in Q1 2026, closing a stake of 10,497 shares — an estimated $304K sold.

Y-Intercept (HK) first reported a position in AMTM in Q3 2024 and held it in 4 quarters. The position peaked at $4.69M in Q2 2025. 487 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Y-Intercept (HK) reported no remaining Amentum Holdings position as of Q1 2026 after selling out during the quarter.
  • Y-Intercept (HK) sold 10,497 Amentum Holdings shares in Q1 2026, an estimated $304K.
  • Y-Intercept (HK) first reported a position in Amentum Holdings in Q3 2024 and held it in 4 quarters.
  • Y-Intercept (HK)'s Amentum Holdings position peaked at $4.69M in Q2 2025.
  • 487 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Y-Intercept (HK)'s 13F filing for Q1 2026, filed 27 Apr 2026.