ET
AMTM

Entropy Technologies’s Amentum Holdings AMTM Stock Holding History

Entropy Technologies’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 		$874K Buy
42,286
+15,391
+57% +$372K 0.03% 534
2026
Q1 		$701K Buy
+26,895
New +$844K 0.03% 510
2025
Q4 		– Sell
-14,570
Closed -$349K – 1206
2025
Q3 		$349K Sell
14,570
-11,597
-44% -$282K 0.03% 618
2025
Q2 		$618K Buy
+26,167
New +$547K 0.05% 422

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

Entropy Technologies's AMTM Position: Q2 2026 in Review

Entropy Technologies increased its Amentum Holdings (AMTM) stake by 57% in Q2 2026, buying an estimated $372K and bringing the position to 42,286 shares worth $874K. The position accounts for 0.03% of the portfolio, ranked #534.

Entropy Technologies first reported a position in AMTM in Q2 2025 and has held it in 4 quarters since. 460 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Entropy Technologies held 42,286 shares of Amentum Holdings worth $874K as of Q2 2026.
  • Entropy Technologies bought 15,391 Amentum Holdings shares in Q2 2026, an estimated $372K.
  • Amentum Holdings made up 0.03% of Entropy Technologies's portfolio in Q2 2026, its #534 holding.
  • Entropy Technologies first reported a position in Amentum Holdings in Q2 2025 and has held it in 4 quarters since.
  • 460 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Entropy Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.