SIA
AMTM

Sit Investment Associates’s Amentum Holdings AMTM Stock Holding History

Sit Investment Associates’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 		$542K Hold
26,202
– – 0.01% 410
2026
Q1 		$683K Hold
26,202
– – 0.01% 393
2025
Q4 		$760K Hold
26,202
– – 0.02% 391
2025
Q3 		$628K Hold
26,202
– – 0.01% 398
2025
Q2 		$619K Buy
26,202
+1,502
+6% +$31.4K 0.01% 401
2025
Q1 		$450K Hold
24,700
– – 0.01% 421
2024
Q4 		$519K Hold
24,700
– – 0.01% 419
2024
Q3 		$797K Buy
+24,700
New +$704K 0.02% 399

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

Sit Investment Associates's AMTM Position: Q2 2026 in Review

Sit Investment Associates held its Amentum Holdings (AMTM) position steady in Q2 2026 at 26,202 shares worth $542K. The position accounts for 0.01% of the portfolio, ranked #410.

Sit Investment Associates first reported a position in AMTM in Q3 2024 and has held it in 8 quarters since. The position peaked at $797K in Q3 2024. 462 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Sit Investment Associates held 26,202 shares of Amentum Holdings worth $542K as of Q2 2026.
  • Sit Investment Associates left its Amentum Holdings share count unchanged in Q2 2026.
  • Amentum Holdings made up 0.01% of Sit Investment Associates's portfolio in Q2 2026, its #410 holding.
  • Sit Investment Associates first reported a position in Amentum Holdings in Q3 2024 and has held it in 8 quarters since.
  • Sit Investment Associates's Amentum Holdings position peaked at $797K in Q3 2024.
  • 462 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Sit Investment Associates's 13F filing for Q2 2026, filed 12 Aug 2026.