CM
AMTM

Caption Management’s Amentum Holdings AMTM Stock Holding History

Caption 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
Q1 		$11.7M Buy
450,000
+250,000
+125% +$7.84M 0.07% 297
2025
Q4 		$5.8M Buy
+200,000
New +$5.11M 0.04% 473
2025
Q2 		– Sell
-57,000
Closed -$1.04M – 2000
2025
Q1 		$1.04M Sell
57,000
-143,000
-72% -$2.91M 0.01% 905
2024
Q4 		$4.21M Buy
+200,000
New +$5.17M 0.04% 420

Other funds holding AMTM

AS
American Securities New York $3.93B AUM 52.22% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $9.73B AUM 55.65% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Caption Management's AMTM Position: Q1 2026 in Review

Caption Management reduced its Amentum Holdings (AMTM) stake by 81% in Q1 2026, selling an estimated $2.97M and leaving 21,722 shares worth $567K. The position accounts for ﹤0.01% of the portfolio, ranked #1179.

Caption Management first reported a position in AMTM in Q4 2024 and has held it in 5 quarters since. The position peaked at $3.38M in Q4 2025. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Caption Management held 21,722 shares of Amentum Holdings worth $567K as of Q1 2026.
  • Caption Management sold 94,778 Amentum Holdings shares in Q1 2026, an estimated $2.97M.
  • Amentum Holdings made up ﹤0.01% of Caption Management's portfolio in Q1 2026, its #1179 holding.
  • Caption Management first reported a position in Amentum Holdings in Q4 2024 and has held it in 5 quarters since.
  • Caption Management's Amentum Holdings position peaked at $3.38M in Q4 2025.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Caption Management's 13F filing for Q1 2026, filed 15 May 2026.