GCP
AMTM

GSA Capital Partners’s Amentum Holdings AMTM Stock Holding History

GSA Capital Partners’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
2025
Q4 		– Sell
-23,285
Closed -$558K – 2165
2025
Q3 		$558K Buy
+23,285
New +$567K 0.05% 772
2025
Q2 		– Sell
-30,488
Closed -$555K – 2227
2025
Q1 		$555K Buy
+30,488
New +$621K 0.05% 728

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
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Focus Partners Wealth
Focus Partners Wealth Boston, Massachusetts $97.6B AUM 29.43% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

GSA Capital Partners's AMTM Position: Q4 2025 in Review

GSA Capital Partners sold out of Amentum Holdings (AMTM) in Q4 2025, closing a stake of 23,285 shares — an estimated $558K sold.

GSA Capital Partners first reported a position in AMTM in Q1 2025 and held it in 2 quarters. The position peaked at $558K in Q3 2025. 483 funds tracked by Wall St. Rank hold AMTM as of Q4 2025.

  • GSA Capital Partners reported no remaining Amentum Holdings position as of Q4 2025 after selling out during the quarter.
  • GSA Capital Partners sold 23,285 Amentum Holdings shares in Q4 2025, an estimated $558K.
  • GSA Capital Partners first reported a position in Amentum Holdings in Q1 2025 and held it in 2 quarters.
  • GSA Capital Partners's Amentum Holdings position peaked at $558K in Q3 2025.
  • 483 funds tracked by Wall St. Rank held Amentum Holdings as of Q4 2025.

Based on GSA Capital Partners's 13F filing for Q4 2025, filed 6 Feb 2026.