Brown Advisory
AMTM

Brown Advisory’s Amentum Holdings AMTM Stock Holding History

Brown Advisory’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 		– Sell
-9,928
Closed -$259K – 1531
2026
Q1 		$259K Sell
9,928
-21
-0.2% -$659 ﹤0.01% 1261
2025
Q4 		$289K Sell
9,949
-202
-2% -$5.16K ﹤0.01% 1221
2025
Q3 		$243K Sell
10,151
-457
-4% -$11.1K ﹤0.01% 1274
2025
Q2 		$250K Sell
10,608
-1,057
-9% -$22.1K ﹤0.01% 1226
2025
Q1 		$212K Sell
11,665
-2,025
-15% -$41.2K ﹤0.01% 1249
2024
Q4 		$288K Sell
13,690
-562
-4% -$14.5K ﹤0.01% 1173
2024
Q3 		$460K Buy
+14,252
New +$406K ﹤0.01% 1007

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

Brown Advisory's AMTM Position: Q2 2026 in Review

Brown Advisory sold out of Amentum Holdings (AMTM) in Q2 2026, closing a stake of 9,928 shares — an estimated $259K sold.

Brown Advisory first reported a position in AMTM in Q3 2024 and held it in 7 quarters. The position peaked at $460K in Q3 2024. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Brown Advisory reported no remaining Amentum Holdings position as of Q2 2026 after selling out during the quarter.
  • Brown Advisory sold 9,928 Amentum Holdings shares in Q2 2026, an estimated $259K.
  • Brown Advisory first reported a position in Amentum Holdings in Q3 2024 and held it in 7 quarters.
  • Brown Advisory's Amentum Holdings position peaked at $460K in Q3 2024.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Brown Advisory's 13F filing for Q2 2026, filed 14 Aug 2026.