BBHC
AMTM

Brown Brothers Harriman & Co’s Amentum Holdings AMTM Stock Holding History

Brown Brothers Harriman & Co’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 		$25.2K Hold
1,221
– – ﹤0.01% 1245
2026
Q1 		$31.8K Buy
1,221
+13
+1% +$408 ﹤0.01% 1121
2025
Q4 		$35K Hold
1,208
– – ﹤0.01% 1096
2025
Q3 		$28.9K Hold
1,208
– – ﹤0.01% 1096
2025
Q2 		$28.5K Buy
1,208
+108
+10% +$2.26K ﹤0.01% 1035
2025
Q1 		$20K Sell
1,100
-701
-39% -$14.3K ﹤0.01% 961
2024
Q4 		$37.9K Sell
1,801
-7
-0.4% -$181 ﹤0.01% 922
2024
Q3 		$58.3K Buy
+1,808
New +$51.5K ﹤0.01% 788

Other funds holding AMTM

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
TCA
Troluce Capital Advisors Dorado, Puerto Rico $971M AUM 2.27% 1-Year Est. Return

Brown Brothers Harriman & Co's AMTM Position: Q2 2026 in Review

Brown Brothers Harriman & Co held its Amentum Holdings (AMTM) position steady in Q2 2026 at 1,221 shares worth $25.2K. The position accounts for ﹤0.01% of the portfolio, ranked #1245.

Brown Brothers Harriman & Co first reported a position in AMTM in Q3 2024 and has held it in 8 quarters since. The position peaked at $58.3K in Q3 2024. 458 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Brown Brothers Harriman & Co held 1,221 shares of Amentum Holdings worth $25.2K as of Q2 2026.
  • Brown Brothers Harriman & Co left its Amentum Holdings share count unchanged in Q2 2026.
  • Amentum Holdings made up ﹤0.01% of Brown Brothers Harriman & Co's portfolio in Q2 2026, its #1245 holding.
  • Brown Brothers Harriman & Co first reported a position in Amentum Holdings in Q3 2024 and has held it in 8 quarters since.
  • Brown Brothers Harriman & Co's Amentum Holdings position peaked at $58.3K in Q3 2024.
  • 458 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Brown Brothers Harriman & Co's 13F filing for Q2 2026, filed 12 Aug 2026.