Holocene Advisors
AMTM

Holocene Advisors’s Amentum Holdings AMTM Stock Holding History

Holocene Advisors’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 		$1.84M Sell
89,037
-34,160
-28% -$826K ﹤0.01% 601
2026
Q1 		$3.21M Buy
123,197
+43,876
+55% +$1.38M 0.01% 485
2025
Q4 		$2.3M Buy
79,321
+33,507
+73% +$857K ﹤0.01% 485
2025
Q3 		$1.1M Buy
+45,814
New +$1.12M ﹤0.01% 614

Other funds holding AMTM

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
TCA
Troluce Capital Advisors Dorado, Puerto Rico $971M AUM 2.27% 1-Year Est. Return

Holocene Advisors's AMTM Position: Q2 2026 in Review

Holocene Advisors reduced its Amentum Holdings (AMTM) stake by 28% in Q2 2026, selling an estimated $826K and leaving 89,037 shares worth $1.84M. The position accounts for ﹤0.01% of the portfolio, ranked #601.

Holocene Advisors first reported a position in AMTM in Q3 2025 and has held it in 4 quarters since. The position peaked at $3.21M in Q1 2026. 458 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Holocene Advisors held 89,037 shares of Amentum Holdings worth $1.84M as of Q2 2026.
  • Holocene Advisors sold 34,160 Amentum Holdings shares in Q2 2026, an estimated $826K.
  • Amentum Holdings made up ﹤0.01% of Holocene Advisors's portfolio in Q2 2026, its #601 holding.
  • Holocene Advisors first reported a position in Amentum Holdings in Q3 2025 and has held it in 4 quarters since.
  • Holocene Advisors's Amentum Holdings position peaked at $3.21M in Q1 2026.
  • 458 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Holocene Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.