Mackenzie Financial’s Amentum Holdings AMTM Stock Holding History

Mackenzie Financial’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	–	Sell	-16,270	Closed	-$424K	–	1707
2026 Q1	$424K	Buy	16,270 +791	+5%	+$24.8K	﹤0.01%	1243
2025 Q4	$453K	Buy	+15,479	New	+$396K	﹤0.01%	1247
2024 Q4	–	Sell	-104,687	Closed	-$3.38M	–	1798
2024 Q3	$3.38M	Buy	+104,687	New	+$2.98M	﹤0.01%	623

Other funds holding AMTM

American Securities New York $3.75B AUM 23.12% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

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

Mackenzie Financial's AMTM Position: Q2 2026 in Review

Mackenzie Financial sold out of Amentum Holdings (AMTM) in Q2 2026, closing a stake of 16,270 shares — an estimated $424K sold.

Mackenzie Financial first reported a position in AMTM in Q3 2024 and held it in 3 quarters. The position peaked at $3.38M in Q3 2024. 461 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

Mackenzie Financial reported no remaining Amentum Holdings position as of Q2 2026 after selling out during the quarter.
Mackenzie Financial sold 16,270 Amentum Holdings shares in Q2 2026, an estimated $424K.
Mackenzie Financial first reported a position in Amentum Holdings in Q3 2024 and held it in 3 quarters.
Mackenzie Financial's Amentum Holdings position peaked at $3.38M in Q3 2024.
461 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on Mackenzie Financial's 13F filing for Q2 2026, filed 13 Aug 2026.