Martin Marietta Materials, Inc.
US ˙ NYSE ˙ US5732841060

SecurityMLM / Martin Marietta Materials, Inc.
InstitutionD.a. Davidson & Co.
Latest Disclosed Ownership13,435 shares
Latest Disclosed Value $ 7,909,024
D.a. Davidson & Co. reports 6.28% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 5, 2026 - D.a. Davidson & Co. filed a 13F-HR form disclosing ownership of 13,435 shares of Martin Marietta Materials, Inc. (US:MLM) valued at $7,908,916 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 14,335 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -6.28% during the quarter. The current value of the position is $7,803,854 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)
2026-05-05 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 13,435 -900 -6.28 7,909 -11.38 0.0479
2026-01-29 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 14,335 -932 -6.10 8,926 -7.24 0.0547
2025-10-22 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 15,267 763 5.26 9,623 20.85 0.0616
2025-07-30 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 14,504 857 6.28 7,962 22.02 0.0561
2025-04-28 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 13,647 -293 -2.10 6,525 -9.37 0.0524
2025-01-31 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 13,940 1,004 7.76 7,200 3.42 0.0586
2024-11-13 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 12,936 1,014 8.51 6,963 7.79 0.0575
2024-08-01 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 11,922 1,180 10.98 6,459 -2.06 0.0573
2024-05-13 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 10,742 587 5.78 6,595 30.18 0.0594
2024-02-09 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 10,155 964 10.49 5,067 34.31 0.0497
2023-11-08 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,191 101 1.11 3,773 -10.10 0.0409
2023-08-11 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,090 -162 -1.75 4,197 27.77 0.0443
2023-04-25 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 9,252 -194 -2.05 3,284 2.85 0.0369
2023-02-03 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,446 603 6.82 3,193 12.11 0.0377
2022-11-07 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 8,843 -151 -1.68 2,848 5.83 0.0373
2022-07-28 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,994 -442 -4.68 2,691 -25.91 0.0338
2022-05-12 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 9,436 135 1.45 3,632 -11.35 0.0396
2022-01-31 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,301 -489 -4.99 4,097 22.48 0.0437
2021-11-15 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,790 170 1.77 3,345 -1.18 0.0388
2021-08-10 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,620 787 8.91 3,385 14.13 0.0397
2021-05-07 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 8,833 1,377 18.47 2,966 40.10 0.0379
2021-02-10 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,456 -288 -3.72 2,117 16.13 0.0324
2020-11-02 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,744 764 10.95 1,823 26.42 0.0317
2020-08-10 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,980 459 7.04 1,442 17.05 0.0269
2020-05-05 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,521 344 5.57 1,232 -28.66 0.0240
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,177 -384 -5.85 1,727 -4.00 0.0279
2019-11-05 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,561 -2 -0.03 1,799 19.14 0.0322
2019-08-13 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,563 44 0.67 1,510 24.59 0.0281
2019-05-13 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,519 474 7.84 1,212 16.65 0.0208
2019-01-29 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,045 204 3.49 1,039 -2.26 0.0203
2018-11-13 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,841 -3,677 -38.63 1,063 -50.00 0.0189
2018-08-02 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,518 351 3.83 2,126 11.84 0.0417
2018-05-04 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 9,167 521 6.03 1,901 -0.52 0.0393
2018-02-08 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 8,646 657 8.22 1,911 16.03 0.0401
2017-11-08 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,989 685 9.38 1,647 1.35 0.0323
2017-08-11 2017-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 7,304 -99 -1.34 1,625 0.62 0.0367
2017-05-12 2017-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 7,403 -37,419 -83.48 1,615 -83.73 0.0392
2017-02-15 2016-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 44,822 -3,228 -6.72 9,927 15.38 0.2251
2016-11-18 2016-09-30 13F/A-1 MARTIN MARIETTA MATERIALS COM 573284106 48,050 7,739 19.20 8,604 11.19 0.2141
2016-11-14 2016-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 48,050 8,604
2016-08-13 2016-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 40,311 -566 -1.38 7,738 18.70 0.2277
2016-05-13 2016-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 40,877 2,216 5.73 6,519 23.51 0.2030
2016-02-12 2015-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 38,661 828 2.19 5,278 -8.14 0.1719
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 37,833 -8,576 -18.48 5,746 -12.49 0.2011
2015-08-14 2015-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 46,409 -2,864 -5.81 6,566 -4.63 0.2158
2015-05-06 2015-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 49,273 -499 -1.00 6,885 25.46 0.2260
2015-02-12 2014-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 49,772 1,150 2.37 5,488 -12.43 0.1794
2014-11-12 2014-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 48,622 1,066 2.24 6,267 -0.16 0.2124
2014-07-29 2014-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 47,556 -697 -1.44 6,277 1.39 0.2126
2014-05-05 2014-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 48,253 4,661 10.69 6,191 42.16 0.2213
2014-02-13 2013-12-31 13F/A-1 MARTIN MARIETTA MATERIALS COM 573284106 43,592 681 1.59 4,355 3.42 0.1627
2014-02-12 2013-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 43,592 4,355
2013-11-14 2013-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 42,911 -216 -0.50 4,211 -0.71 0.1894
2013-08-16 2013-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 43,127 43,127 4,241 0.2048
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.