OCA
AMTM

OpenArc Corporate Advisory’s Amentum Holdings AMTM Stock Holding History

OpenArc Corporate 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 		$3.52M Sell
170,291
-61
-0% -$1.48K 0.04% 194
2026
Q1 		$4.44M Sell
170,352
-29,973
-15% -$941K 0.06% 157
2025
Q4 		$5.81M Buy
+200,325
New +$5.12M 0.1% 128

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 $3.38T AUM 44.17% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return

OpenArc Corporate Advisory's AMTM Position: Q2 2026 in Review

OpenArc Corporate Advisory reduced its Amentum Holdings (AMTM) stake by 0.04% in Q2 2026, selling an estimated $1.48K and leaving 170,291 shares worth $3.52M. The position accounts for 0.04% of the portfolio, ranked #194.

OpenArc Corporate Advisory first reported a position in AMTM in Q4 2025 and has held it in 3 quarters since. The position peaked at $5.81M in Q4 2025. 464 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • OpenArc Corporate Advisory held 170,291 shares of Amentum Holdings worth $3.52M as of Q2 2026.
  • OpenArc Corporate Advisory sold 61 Amentum Holdings shares in Q2 2026, an estimated $1.48K.
  • Amentum Holdings made up 0.04% of OpenArc Corporate Advisory's portfolio in Q2 2026, its #194 holding.
  • OpenArc Corporate Advisory first reported a position in Amentum Holdings in Q4 2025 and has held it in 3 quarters since.
  • OpenArc Corporate Advisory's Amentum Holdings position peaked at $5.81M in Q4 2025.
  • 464 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on OpenArc Corporate Advisory's 13F filing for Q2 2026, filed 5 Aug 2026.