Millennium Management
AMTM

Millennium Management’s Amentum Holdings AMTM Stock Holding History

Millennium 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 		$16.5M Buy
631,055
+569,868
+931% +$17.9M 0.01% 1708
2025
Q4 		$1.77M Sell
61,187
-579,612
-90% -$14.8M ﹤0.01% 4052
2025
Q3 		$15.3M Sell
640,799
-4,025,416
-86% -$98M 0.01% 1956
2025
Q2 		$110M Buy
4,666,215
+2,654,423
+132% +$55.5M 0.05% 348
2025
Q1 		$36.6M Buy
2,011,792
+815,218
+68% +$16.6M 0.02% 992
2024
Q4 		$25.2M Buy
1,196,574
+524,807
+78% +$13.6M 0.01% 1333
2024
Q3 		$21.7M Buy
+671,767
New +$19.1M 0.01% 1490

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

Millennium Management's AMTM Position: Q1 2026 in Review

Millennium Management increased its Amentum Holdings (AMTM) stake by 931% in Q1 2026, buying an estimated $17.9M and bringing the position to 631,055 shares worth $16.5M. The position accounts for 0.01% of the portfolio, ranked #1708.

Millennium Management first reported a position in AMTM in Q3 2024 and has held it in 7 quarters since. The position peaked at $110M in Q2 2025. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Millennium Management held 631,055 shares of Amentum Holdings worth $16.5M as of Q1 2026.
  • Millennium Management bought 569,868 Amentum Holdings shares in Q1 2026, an estimated $17.9M.
  • Amentum Holdings made up 0.01% of Millennium Management's portfolio in Q1 2026, its #1708 holding.
  • Millennium Management first reported a position in Amentum Holdings in Q3 2024 and has held it in 7 quarters since.
  • Millennium Management's Amentum Holdings position peaked at $110M in Q2 2025.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

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