CI Investments Inc
AMTM

CI Investments Inc’s Amentum Holdings AMTM Stock Holding History

CI Investments Inc’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
-420,068
Closed -$11M – 787
2026
Q1 		$11M Sell
420,068
-5,460
-1% -$171K 0.05% 208
2025
Q4 		$12.3M Sell
425,528
-2,743
-0.6% -$70.1K 0.05% 202
2025
Q3 		$10.3M Sell
428,271
-26,151
-6% -$637K 0.04% 216
2025
Q2 		$10.7M Buy
454,422
+10,841
+2% +$227K 0.04% 217
2025
Q1 		$8.07M Sell
443,581
-199,534
-31% -$4.06M 0.03% 240
2024
Q4 		$13.5M Sell
643,115
-330,742
-34% -$8.55M 0.05% 205
2024
Q3 		$31.4M Buy
+973,857
New +$27.7M 0.12% 140

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

CI Investments Inc's AMTM Position: Q2 2026 in Review

CI Investments Inc sold out of Amentum Holdings (AMTM) in Q2 2026, closing a stake of 420,068 shares — an estimated $11M sold.

CI Investments Inc first reported a position in AMTM in Q3 2024 and held it in 7 quarters. The position peaked at $31.4M in Q3 2024. 458 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • CI Investments Inc reported no remaining Amentum Holdings position as of Q2 2026 after selling out during the quarter.
  • CI Investments Inc sold 420,068 Amentum Holdings shares in Q2 2026, an estimated $11M.
  • CI Investments Inc first reported a position in Amentum Holdings in Q3 2024 and held it in 7 quarters.
  • CI Investments Inc's Amentum Holdings position peaked at $31.4M in Q3 2024.
  • 458 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on CI Investments Inc's 13F filing for Q2 2026, filed 13 Aug 2026.