Two Sigma Investments
AMTM

Two Sigma Investments’s Amentum Holdings AMTM Stock Holding History

Two Sigma Investments’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
Q2 		$5.88M Sell
284,268
-615,909
-68% -$14.9M ﹤0.01% 1986
2026
Q1 		$23.5M Buy
900,177
+262,191
+41% +$8.23M 0.02% 860
2025
Q4 		$18.5M Buy
637,986
+238,863
+60% +$6.11M 0.03% 766
2025
Q3 		$9.56M Buy
399,123
+385,394
+2,807% +$9.38M 0.01% 983
2025
Q2 		$324K Sell
13,729
-40,371
-75% -$844K ﹤0.01% 2761
2025
Q1 		$985K Buy
+54,100
New +$1.1M ﹤0.01% 2184
2024
Q4 		– Sell
-321,096
Closed -$10.4M – 3550
2024
Q3 		$10.4M Buy
+321,096
New +$9.15M 0.02% 746

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
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 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

Two Sigma Investments's AMTM Position: Q2 2026 in Review

Two Sigma Investments reduced its Amentum Holdings (AMTM) stake by 68% in Q2 2026, selling an estimated $14.9M and leaving 284,268 shares worth $5.88M. The position accounts for ﹤0.01% of the portfolio, ranked #1986.

Two Sigma Investments first reported a position in AMTM in Q3 2024 and has held it in 7 quarters since. The position peaked at $23.5M in Q1 2026. 461 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Two Sigma Investments held 284,268 shares of Amentum Holdings worth $5.88M as of Q2 2026.
  • Two Sigma Investments sold 615,909 Amentum Holdings shares in Q2 2026, an estimated $14.9M.
  • Amentum Holdings made up ﹤0.01% of Two Sigma Investments's portfolio in Q2 2026, its #1986 holding.
  • Two Sigma Investments first reported a position in Amentum Holdings in Q3 2024 and has held it in 7 quarters since.
  • Two Sigma Investments's Amentum Holdings position peaked at $23.5M in Q1 2026.
  • 461 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.