Martin Marietta Materials, Inc.
US ˙ NYSE ˙ US5732841060

SecurityMLM / Martin Marietta Materials, Inc.
InstitutionBokf, Na
Latest Disclosed Ownership335 shares
Latest Disclosed Value $ 197,208
Bokf, Na reports 3.72% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 8, 2026 - Bokf, Na filed a 13F-HR form disclosing ownership of 335 shares of Martin Marietta Materials, Inc. (US:MLM) valued at $197,208 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 323 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 3.72% during the quarter. The current value of the position is $195,355 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)
2026-05-08 2026-03-31 13F MARTIN MARIETTA MATERIALS common 573284106 335 12 3.72 197 -1.99 0.0023
2026-02-03 2025-12-31 13F MARTIN MARIETTA MATERIALS common 573284106 323 -365 -53.05 201 -53.58 0.0031
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATERIALS common 573284106 688 -975 -58.63 434 -52.52 0.0065
2025-08-12 2025-06-30 13F MARTIN MARIETTA MATERIALS common 573284106 1,663 367 28.32 913 47.33 0.0148
2025-05-13 2025-03-31 13F MARTIN MARIETTA MATERIALS common 573284106 1,296 -497 -27.72 620 -32.13 0.0110
2025-02-14 2024-12-31 13F MARTIN MARIETTA MATERIALS common 573284106 1,793 -290 -13.92 912 -15.94 0.0154
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATERIALS common 573284106 2,083 1 0.05 1,086 -3.81 0.0193
2024-08-08 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,082 277 15.35 1,128 3.49 0.0202
2024-05-15 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,805 -11 -0.61 1,091 20.31 0.0199
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,816 -13 -0.71 906 21.29 0.0177
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,829 8 0.44 748 -11.07 0.0165
2023-08-21 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,821 -7 -0.38 841 29.43 0.0171
2023-05-11 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,828 -426 -18.90 649 -14.72 0.0136
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,254 289 14.71 762 20.22 0.0141
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,965 13 0.67 633 8.39 0.0128
2022-08-11 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,952 -46 -2.30 584 -24.06 0.0112
2022-05-13 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,998 -21 -1.04 769 -13.50 0.0127
2022-03-11 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,019 265 15.11 889 48.17 0.0138
2021-11-10 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,754 92 5.54 600 7.53 0.0103
2021-04-21 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,662 -1,765 -51.50 558 -42.65 0.0101
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,427 1,711 99.71 973 140.84 0.0186
2020-10-30 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,716 3 0.18 404 14.12 0.0089
2020-08-12 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,713 28 1.66 354 10.97 0.0083
2020-05-13 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,685 -20 -1.17 319 -33.12 0.0092
2020-02-12 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,705 -13 -0.76 477 1.27 0.0108
2019-11-13 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,718 18 1.06 471 20.46 0.0113
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,700 9 0.53 391 15.00 0.0094
2019-05-15 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,691 82 5.10 340 22.74 0.0081
2019-02-13 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,609 47 3.01 277 -2.81 0.0079
2018-11-13 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,562 -97 -5.85 285 -22.97 0.0072
2018-08-13 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,659 -459 -21.67 370 -15.72 0.0100
2018-05-14 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,118 -52 -2.40 439 -8.35 0.0125
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,170 -87 -3.85 479 2.79 0.0132
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,257 65 2.97 466 -4.51 0.0135
2017-08-14 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,192 -8 -0.36 488 1.67 0.0154
2017-05-15 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,200 -136 -5.82 480 -7.16 0.0150
2017-02-14 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,336 0 0.00 517 23.39 0.0170
2016-11-10 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,336 -123 -5.00 419 -11.23 0.0139
2016-08-12 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,459 -15 -0.61 472 19.49 0.0166
2016-05-13 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,474 -31 -1.24 395 15.50 0.0143
2016-02-09 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,505 7 0.28 342 -9.76 0.0124
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,498 25 1.01 379 8.29 0.0143
2015-08-13 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,473 7 0.28 350 1.74 0.0119
2015-05-14 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,466 2,466 0.00 344 0.0116
2015-02-12 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -2,708 -100.00 0 -100.00
2014-11-13 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,708 1,108 69.25 349 65.40 0.0117
2014-08-14 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,600 -1,006 -38.60 211 -36.83 0.0068
2014-05-14 2014-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,606 0 0.00 334 27.97 0.0111
2014-02-14 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,606 96 3.82 261 6.10 0.0087
2013-11-12 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,510 5 0.20 246 -0.40 0.0089
2013-08-14 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,505 2,505 247 0.0093
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.