MG
AMTM

Mather Group’s Amentum Holdings AMTM Stock Holding History

Mather Group’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 		$2.5K Sell
121
-1,228
-91% -$29.7K ﹤0.01% 1711
2026
Q1 		$35.2K Buy
+1,349
New +$42.3K ﹤0.01% 1136
2025
Q4 		– Sell
-1,349
Closed -$32.3K – 1697
2025
Q3 		$32.3K Buy
+1,349
New +$32.8K ﹤0.01% 1010
2025
Q2 		– Sell
-487
Closed -$8.86K – 1777
2025
Q1 		$8.86K Buy
487
+231
+90% +$4.71K ﹤0.01% 1284
2024
Q4 		$5.38K Sell
256
-14
-5% -$362 ﹤0.01% 1367
2024
Q3 		$8.71K Buy
+270
New +$7.69K ﹤0.01% 1200

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

Mather Group's AMTM Position: Q2 2026 in Review

Mather Group reduced its Amentum Holdings (AMTM) stake by 91% in Q2 2026, selling an estimated $29.7K and leaving 121 shares worth $2.5K. The position accounts for ﹤0.01% of the portfolio, ranked #1711.

Mather Group first reported a position in AMTM in Q3 2024 and has held it in 6 quarters since. The position peaked at $35.2K in Q1 2026. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Mather Group held 121 shares of Amentum Holdings worth $2.5K as of Q2 2026.
  • Mather Group sold 1,228 Amentum Holdings shares in Q2 2026, an estimated $29.7K.
  • Amentum Holdings made up ﹤0.01% of Mather Group's portfolio in Q2 2026, its #1711 holding.
  • Mather Group first reported a position in Amentum Holdings in Q3 2024 and has held it in 6 quarters since.
  • Mather Group's Amentum Holdings position peaked at $35.2K in Q1 2026.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Mather Group's 13F filing for Q2 2026, filed 27 Jul 2026.