Martin Marietta Materials, Inc.
US ˙ NYSE ˙ US5732841060

SecurityMLM / Martin Marietta Materials, Inc.
InstitutionCommerce Bank
Latest Disclosed Ownership2,982 shares
Latest Disclosed Value $ 1,755,444
Commerce Bank reports 9.87% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 11, 2026 - Commerce Bank filed a 13F-HR form disclosing ownership of 2,982 shares of Martin Marietta Materials, Inc. (US:MLM) valued at $1,755,444 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,714 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 9.87% during the quarter. The current value of the position is $1,738,953 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)
2026-05-11 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,982 268 9.87 1,755 3.91 0.0085
2026-02-13 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,714 252 10.24 1,690 8.90 0.0093
2025-11-12 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,462 -20 -0.81 1,552 13.88 0.0086
2025-08-07 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,482 -28 -1.12 1,363 13.50 0.0080
2025-05-08 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,510 7 0.28 1,200 -7.12 0.0077
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,503 -96 -3.69 1,293 -7.58 0.0080
2024-11-08 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,599 -127 -4.66 1,399 -5.28 0.0086
2024-08-12 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,726 194 7.66 1,477 -5.02 0.0096
2024-05-03 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,532 -308 -10.85 1,554 9.75 0.0103
2024-02-09 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,840 72 2.60 1,417 24.65 0.0101
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,768 -6,961 -71.55 1,136 -74.70 0.0089
2023-08-08 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,729 -2,416 -19.89 4,492 4.15 0.0336
2023-05-04 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 12,145 1,049 9.45 4,312 14.99 0.0338
2023-02-10 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 11,096 8,383 308.99 3,750 329.06 0.0305
2022-11-04 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,713 -319 -10.52 874 -3.64 0.0076
2022-08-12 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,032 62 2.09 907 -20.65 0.0074
2022-05-09 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,970 26 0.88 1,143 -11.87 0.0078
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,944 20 0.68 1,297 29.83 0.0085
2021-11-09 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,924 368 14.40 999 11.12 0.0071
2021-08-09 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,556 6 0.24 899 5.02 0.0064
2021-05-05 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,550 -337 -11.67 856 4.39 0.0065
2021-02-09 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,887 -110 -3.67 820 16.31 0.0066
2020-11-06 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,997 -1,036 -25.69 705 -15.37 0.0064
2020-08-07 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,033 -964 -19.29 833 -11.95 0.0081
2020-05-08 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,997 807 19.26 946 -19.28 0.0115
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,190 -70 -1.64 1,172 0.34 0.0112
2019-11-12 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,260 93 2.23 1,168 21.79 0.0120
2019-08-07 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,167 -247 -5.60 959 8.00 0.0108
2019-05-08 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,414 -174 -3.79 888 12.69 0.0105
2019-02-11 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,588 168 3.80 788 -1.99 0.0100
2018-11-02 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,420 221 5.26 804 -14.29 0.0096
2018-08-08 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,199 193 4.82 938 13.01 0.0119
2018-05-03 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,006 -221 -5.23 830 -11.23 0.0110
2018-02-12 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,227 36 0.86 935 8.09 0.0122
2017-11-07 2017-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 4,191 -117 -2.72 865 -9.80 0.0118
2017-11-07 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,308 959
2017-08-08 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,308 137 3.28 959 5.27 0.0134
2017-05-05 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,171 168 4.20 911 2.82 0.0130
2017-02-08 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,003 184 4.82 886 29.53 0.0132
2016-11-03 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,819 -298 -7.24 684 -13.42 0.0106
2016-08-09 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,117 0 0.00 790 20.43 0.0125
2016-04-27 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,117 -1,005 -19.62 656 -6.15 0.0109
2016-02-12 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,122 0 0.00 699 -10.15 0.0117
2015-11-10 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,122 5 0.10 778 7.46 0.0134
2015-08-03 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,117 -2,000 -28.10 724 -27.24 0.0113
2015-05-06 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,117 0 0.00 995 26.75 0.0155
2015-02-11 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,117 -215 -2.93 785 -17.02 0.0124
2014-11-06 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,332 7,332 946 0.0156
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.