Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionComerica Bank
Latest Disclosed Ownership11,871 shares
Latest Disclosed Value $ 7,391,361
Comerica Bank reports 7.13% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 11,871 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $7,391,361 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 12,782 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -7.13% during the quarter.

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)
2026-01-29 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 11,871 -911 -7.13 7,391 -8.25 0.0295
2025-11-14 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 12,782 -241 -1.85 8,056 12.69 0.0303
2025-08-14 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 13,023 871 7.17 7,149 23.05 0.0277
2025-05-14 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 12,152 -259 -2.09 5,810 -9.35 0.0244
2025-02-14 2024-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 12,411 -362 -2.83 6,410 -6.78 0.0258
2025-02-14 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 12,411 -362 6,410 0.0215
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 12,773 -416 -3.15 6,875 -3.78 0.0272
2024-08-15 2024-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 13,189 -402 -2.96 7,146 -14.37 0.0297
2024-05-16 2024-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 13,591 -204 -1.48 8,344 21.24 0.0360
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 13,795 99 0.72 6,883 22.43 0.0317
2023-11-21 2023-09-30 13F MARTIN MARIETTA MATLS COMMON 573284106 13,696 -158,018 -92.02 5,622 0.0293
2023-08-22 2023-06-30 13F MARTIN MARIETTA MATERIALS EQU 573284106 171,714 163,743 2,054.23 0 -100.00 0.0026
2023-01-26 2022-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 7,971 94 1.19 3 -99.92 0.0219
2022-10-28 2022-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 7,877 102 1.31 2,497 -0.60 0.0211
2022-08-02 2022-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 7,775 112 1.46 2,512 -13.50 0.0206
2022-04-27 2022-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 7,663 -63 -0.82 2,904 2.18 0.0211
2022-02-18 2021-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 7,726 -220 -2.77 2,842 -6.20 0.0209
2021-11-22 2021-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 7,946 -2,726 -25.54 3,030 -23.87 0.0182
2021-08-26 2021-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 10,672 -371 -3.36 3,980 2.74 0.0238
2021-04-28 2021-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 11,043 -413 -3.61 3,874 9.22 0.0231
2021-01-28 2020-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 11,456 -2,702 -19.08 3,547 -4.52 0.0225
2020-10-30 2020-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 14,158 23 0.16 3,715 17.16 0.0270
2020-07-31 2020-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 14,135 438 3.20 3,171 30.55 0.0244
2020-05-01 2020-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 13,697 -35 -0.25 2,429 -33.67 0.0223
2020-02-07 2019-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 13,732 1,647 13.63 3,662 14.40 0.0277
2019-10-31 2019-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 12,085 -146 -1.19 3,201 14.57 0.0253
2019-08-02 2019-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 12,231 201 1.67 2,794 13.39 0.0224
2019-05-02 2019-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 12,030 -44 -0.36 2,464 13.18 0.0200
2019-02-06 2018-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 12,074 -54 -0.45 2,177 9.51 0.0185
2018-11-01 2018-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 12,128 -3,097 -20.34 1,988 -42.06 0.0160
2018-08-01 2018-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 15,225 -2,324 -13.24 3,431 -1.35 0.0240
2018-05-01 2018-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 17,549 -1,686 -8.77 3,478 -22.16 0.0248
2018-02-02 2017-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 19,235 -3,435 -15.15 4,468 -9.54 0.0298
2017-11-06 2017-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 22,670 208 0.93 4,939 -3.14 0.0357
2017-08-03 2017-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 22,462 -175 -0.77 5,099 0.85 0.0382
2017-05-03 2017-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 22,637 486 2.19 5,056 3.44 0.0384
2017-02-08 2016-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 22,151 2,081 10.37 4,888 21.86 0.0387
2016-08-11 2016-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 20,070 -226 -1.11 4,011 19.30 0.0346
2016-05-11 2016-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 20,296 -58 -0.28 3,362 30.97 0.0300
2016-02-05 2015-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 20,354 744 3.79 2,567 -13.86 0.0252
2015-11-12 2015-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 19,610 -16,552 -45.77 2,980 -41.77 0.0282
2015-08-13 2015-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 36,162 17,332 92.04 5,118 94.45 0.0220
2015-05-15 2015-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 18,830 -21,700 -53.54 2,632 -41.14 0.0223
2015-02-13 2014-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 40,530 20,136 98.73 4,472 70.04 0.0193
2014-10-21 2014-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 20,394 -15,628 -43.38 2,630 -44.71 0.0232
2014-08-12 2014-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 36,022 -3,552 -8.98 4,757 -6.34 0.0404
2014-05-15 2014-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 39,574 344 0.88 5,079 29.53 0.0389
2014-02-11 2013-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 39,230 -524 -1.32 3,921 0.49 0.0304
2013-11-12 2013-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 39,754 1,283 3.33 3,902 3.06 0.0272
2013-08-13 2013-06-30 13F/A-1 MARTIN MARIETTA MATERIALS COM 573284106 38,471 38,471 3,786 0.0309
2013-08-08 2013-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 190,675 18,766
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.