Vanguard Personalized Indexing Management
AMTM

Vanguard Personalized Indexing Management’s Amentum Holdings AMTM Stock Holding History

Vanguard Personalized Indexing Management’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 		$354K Buy
17,111
+621
+4% +$15K ﹤0.01% 1602
2026
Q1 		$430K Sell
16,490
-1,261
-7% -$39.6K ﹤0.01% 1394
2025
Q4 		$515K Buy
17,751
+1,999
+13% +$51.1K 0.01% 1241
2025
Q3 		$384K Buy
15,752
+1,147
+8% +$27.9K ﹤0.01% 1363
2025
Q2 		$352K Buy
+14,605
New +$305K ﹤0.01% 1369
2025
Q1 		– Sell
-9,651
Closed -$203K – 1921
2024
Q4 		$203K Buy
+9,651
New +$249K ﹤0.01% 1521

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

Vanguard Personalized Indexing Management's AMTM Position: Q2 2026 in Review

Vanguard Personalized Indexing Management increased its Amentum Holdings (AMTM) stake by 3.8% in Q2 2026, buying an estimated $15K and bringing the position to 17,111 shares worth $354K. The position accounts for ﹤0.01% of the portfolio, ranked #1602.

Vanguard Personalized Indexing Management first reported a position in AMTM in Q4 2024 and has held it in 6 quarters since. The position peaked at $515K in Q4 2025. 458 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Vanguard Personalized Indexing Management held 17,111 shares of Amentum Holdings worth $354K as of Q2 2026.
  • Vanguard Personalized Indexing Management bought 621 Amentum Holdings shares in Q2 2026, an estimated $15K.
  • Amentum Holdings made up ﹤0.01% of Vanguard Personalized Indexing Management's portfolio in Q2 2026, its #1602 holding.
  • Vanguard Personalized Indexing Management first reported a position in Amentum Holdings in Q4 2024 and has held it in 6 quarters since.
  • Vanguard Personalized Indexing Management's Amentum Holdings position peaked at $515K in Q4 2025.
  • 458 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Vanguard Personalized Indexing Management's 13F filing for Q2 2026, filed 11 Aug 2026.