Martin Marietta Materials, Inc.
US ˙ NYSE ˙ US5732841060

SecurityMLM / Martin Marietta Materials, Inc.
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership6,948 shares
Latest Disclosed Value $ 4,090,149
Mackenzie Financial Corp reports 9.09% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 6,948 shares of Martin Marietta Materials, Inc. (US:MLM) valued at $4,090,149 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 6,369 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 9.09% during the quarter. The current value of the position is $4,051,726 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,948 579 9.09 4,090 1.92 0.0049
2026-02-18 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,369 413 6.93 4,014 6.93 0.0048
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,956 -2,670 -30.95 3,754 -20.74 0.0045
2025-08-13 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,626 122 1.43 4,735 16.45 0.0061
2025-05-07 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 8,504 354 4.34 4,066 -3.40 0.0058
2025-05-02 2024-12-31 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 8,150 942 13.07 4,209 8.51 0.0057
2025-02-20 2024-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 8,150 942 4,209 0.0055
2025-02-14 2024-12-31 13F Martin Marietta Materials Common Stock 573284106 8,150 942 1,549 0.0022
2024-11-13 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,208 383 5.61 3,880 4.92 0.0054
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,825 1,691 32.94 3,698 17.33 0.0055
2024-05-10 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,134 257 5.27 3,152 29.51 0.0045
2024-01-30 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,877 -418 -7.89 2,433 13.64 0.0037
2023-10-25 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,295 182 3.56 2,141 -8.19 0.0036
2023-08-03 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,113 -123 -2.35 2,333 25.44 0.0035
2023-04-24 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,236 83 1.61 1,859 6.78 0.0029
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,153 776 17.73 1,742 23.48 0.0029
2022-10-07 2022-09-30 13F Martin Marietta Materials Common Stock 573284106 4,377 103 2.41 1,410 10.24 0.0024
2022-08-10 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,274 154 3.74 1,279 -19.36 0.0020
2022-05-13 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,120 38 0.93 1,586 -11.79 0.0021
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,082 -118 -2.81 1,798 25.30 0.0024
2021-11-08 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,200 1,142 37.34 1,435 33.36 0.0020
2021-08-11 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,058 130 4.44 1,076 9.46 0.0015
2021-05-14 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,928 1,042 55.25 983 83.40 0.0015
2021-02-10 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,886 92 5.13 536 27.01 0.0012
2020-11-13 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,794 60 3.46 422 17.88 0.0010
2020-08-13 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,734 22 1.29 358 10.49 0.0010
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,712 180 11.75 324 -24.30 0.0010
2020-02-13 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,532 600 64.38 428 67.84 0.0011
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 932 13 1.41 255 20.85 0.0007
2019-08-23 2019-06-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 919 -1,034 -52.94 211 -46.31 0.0005
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 919 -1,034 211
2019-05-15 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,953 -609 -23.77 393 -10.68 0.0009
2019-02-06 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,562 -506 -16.49 440 -21.15 0.0012
2018-11-15 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,068 -157,519 -98.09 558 -98.44 0.0014
2018-08-13 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 160,587 17,465 12.20 35,864 20.88 0.0915
2018-05-14 2018-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 143,122 143,122 29,669 0.0756
2018-05-14 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 143,122 29,669
2013-11-12 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -5,300 -100.00 0 -100.00
2013-08-20 2013-06-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 5,300 5,300 522 0.0025
2013-08-09 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,300 522 0.0025
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.