GC
AMTM

Grizzlyrock Capital’s Amentum Holdings AMTM Stock Holding History

Grizzlyrock Capital’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 		$6.58M Buy
318,363
+29,250
+10% +$707K 4.6% 11
2026
Q1 		$7.54M Buy
289,113
+4,000
+1% +$126K 5.97% 8
2025
Q4 		$8.27M Buy
285,113
+2,000
+0.7% +$51.1K 6.19% 6
2025
Q3 		$6.78M Buy
283,113
+29,750
+12% +$724K 5.27% 9
2025
Q2 		$5.98M Buy
253,363
+89,137
+54% +$1.86M 4.08% 10
2025
Q1 		$2.99M Buy
+164,226
New +$3.34M 2.71% 11

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

Grizzlyrock Capital's AMTM Position: Q2 2026 in Review

Grizzlyrock Capital increased its Amentum Holdings (AMTM) stake by 10% in Q2 2026, buying an estimated $707K and bringing the position to 318,363 shares worth $6.58M. The position accounts for 4.6% of the portfolio, ranked #11.

Grizzlyrock Capital first reported a position in AMTM in Q1 2025 and has held it in 6 quarters since. The position peaked at $8.27M in Q4 2025. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Grizzlyrock Capital held 318,363 shares of Amentum Holdings worth $6.58M as of Q2 2026.
  • Grizzlyrock Capital bought 29,250 Amentum Holdings shares in Q2 2026, an estimated $707K.
  • Amentum Holdings made up 4.6% of Grizzlyrock Capital's portfolio in Q2 2026, its #11 holding.
  • Grizzlyrock Capital first reported a position in Amentum Holdings in Q1 2025 and has held it in 6 quarters since.
  • Grizzlyrock Capital's Amentum Holdings position peaked at $8.27M in Q4 2025.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Grizzlyrock Capital's 13F filing for Q2 2026, filed 14 Aug 2026.