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Investment Management Corp of Ontario (IMCO)’s Martin Marietta Materials MLM Stock Holding History

Investment Management Corp of Ontario (IMCO)’s Portfolio MLM Stock Details MLM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$2.22M Sell
3,843
-1,564
-29% -$927K 0.03% 402
2026
Q1 		$3.18M Buy
5,407
+200
+4% +$128K 0.04% 342
2025
Q4 		$3.24M Buy
5,207
+1,334
+34% +$830K 0.04% 335
2025
Q3 		$2.44M Buy
3,873
+1,304
+51% +$777K 0.04% 312
2025
Q2 		$1.41M Sell
2,569
-200
-7% -$106K 0.02% 360
2025
Q1 		$1.32M Buy
+2,769
New +$1.41M 0.03% 362
2024
Q4 		– Sell
-2,872
Closed -$1.55M – 537
2024
Q3 		$1.55M Buy
2,872
+700
+32% +$378K 0.03% 310
2024
Q2 		$1.18M Buy
2,172
+300
+16% +$174K 0.03% 298
2024
Q1 		$1.15M Buy
1,872
+387
+26% +$211K 0.03% 281
2023
Q4 		$741K Buy
+1,485
New +$669K 0.02% 399

Other funds holding MLM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return
Aristotle Capital Management
Aristotle Capital Management Los Angeles, California $47.7B AUM 13.92% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $178B AUM 37.23% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Investment Management Corp of Ontario (IMCO)'s MLM Position: Q2 2026 in Review

Investment Management Corp of Ontario (IMCO) reduced its Martin Marietta Materials (MLM) stake by 29% in Q2 2026, selling an estimated $927K and leaving 3,843 shares worth $2.22M. The position accounts for 0.03% of the portfolio, ranked #402.

Investment Management Corp of Ontario (IMCO) first reported a position in MLM in Q4 2023 and has held it in 10 quarters since. The position peaked at $3.24M in Q4 2025. 1,069 funds tracked by Wall St. Rank hold MLM as of Q2 2026.

  • Investment Management Corp of Ontario (IMCO) held 3,843 shares of Martin Marietta Materials worth $2.22M as of Q2 2026.
  • Investment Management Corp of Ontario (IMCO) sold 1,564 Martin Marietta Materials shares in Q2 2026, an estimated $927K.
  • Martin Marietta Materials made up 0.03% of Investment Management Corp of Ontario (IMCO)'s portfolio in Q2 2026, its #402 holding.
  • Investment Management Corp of Ontario (IMCO) first reported a position in Martin Marietta Materials in Q4 2023 and has held it in 10 quarters since.
  • Investment Management Corp of Ontario (IMCO)'s Martin Marietta Materials position peaked at $3.24M in Q4 2025.
  • 1,069 funds tracked by Wall St. Rank held Martin Marietta Materials as of Q2 2026.

Based on Investment Management Corp of Ontario (IMCO)'s 13F filing for Q2 2026, filed 14 Aug 2026.