Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionDouglas Lane & Associates, LLC
Latest Disclosed Ownership41,981 shares
Latest Disclosed Value $ 24,713,247
Douglas Lane & Associates, LLC reports 0.72% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On April 15, 2026 - Douglas Lane & Associates, LLC filed a 13F-HR form disclosing ownership of 41,981 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $24,713,247 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 42,285 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -0.72% 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)
2026-04-15 2026-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 41,981 -304 -0.72 24,713 -6.14 0.3564
2026-01-22 2025-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 42,285 -418 -0.98 26,329 -2.17 0.3614
2025-10-10 2025-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 42,703 1,145 2.76 26,915 17.98 0.3750
2025-07-07 2025-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 41,558 5,439 15.06 22,814 32.10 0.3306
2025-04-09 2025-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 36,119 1,683 4.89 17,270 -2.91 0.2545
2025-01-08 2024-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 34,436 -476 -1.36 17,786 -5.35 0.2508
2024-10-10 2024-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 34,912 -259 -0.74 18,792 -1.39 0.2583
2024-07-08 2024-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 35,171 -639 -1.78 19,056 -13.33 0.2707
2024-04-11 2024-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 35,810 -408 -1.13 21,985 21.67 0.3107
2024-01-17 2023-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 36,218 -757 -2.05 18,070 19.06 0.2784
2023-10-16 2023-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 36,975 -929 -2.45 15,178 -13.27 0.2547
2023-07-19 2023-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 37,904 2,480 7.00 17,500 39.14 0.2826
2023-04-17 2023-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 35,424 2,869 8.81 12,578 14.32 0.2092
2023-02-14 2022-12-31 13F/A-1 MARTIN MARIETTA MATERIALS COMMON 573284106 32,555 52 0.16 11,003 5.09 0.1839
2023-01-17 2022-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 32,759 256 11 0.1845
2022-10-14 2022-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 32,503 -282 -0.86 10,469 6.71 0.1934
2022-07-18 2022-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 32,785 -2,861 -8.03 9,811 -28.49 0.1666
2022-04-25 2022-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 35,646 -10,300 -22.42 13,720 -32.21 0.1937
2022-01-25 2021-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 45,946 -2,471 -5.10 20,240 22.35 0.2693
2021-10-21 2021-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 48,417 -893 -1.81 16,543 -4.64 0.2368
2021-07-19 2021-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 49,310 -170 -0.34 17,348 4.41 0.2433
2021-04-19 2021-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 49,480 -236 -0.47 16,616 17.69 0.2575
2021-01-14 2020-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 49,716 382 0.77 14,118 21.59 0.2365
2020-10-19 2020-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 49,334 25,934 110.83 11,611 140.19 0.2299
2020-07-28 2020-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 23,400 9,853 72.73 4,834 88.61 0.1038
2020-04-20 2020-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 13,547 2,478 22.39 2,563 -17.19 0.0674
2020-01-27 2019-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 11,069 -15 -0.14 3,095 1.88 0.0576
2019-10-16 2019-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 11,084 -160 -1.42 3,038 17.43 0.0605
2019-07-08 2019-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 11,244 -10 -0.09 2,587 14.27 0.0504
2019-04-23 2019-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 11,254 1,879 20.04 2,264 40.53 0.0470
2019-01-17 2018-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 9,375 5,350 132.92 1,611 120.08 0.0380
2018-10-09 2018-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 4,025 113 2.89 732 -16.25 0.0144
2018-07-23 2018-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 3,912 0 0.00 874 7.77 0.0185
2018-04-23 2018-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 3,912 74 1.93 811 -4.36 0.0176
2018-01-24 2017-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 3,838 67 1.78 848 9.00 0.0179
2017-10-19 2017-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 3,771 -57 -1.49 778 -8.69 0.0178
2017-07-19 2017-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 3,828 0 0.00 852 2.04 0.0201
2017-04-21 2017-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 3,828 -170 -4.25 835 -5.76 0.0208
2017-01-17 2016-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 3,998 -87 -2.13 886 21.04 0.0226
2016-10-28 2016-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 4,085 -447 -9.86 732 -15.86 0.0195
2016-07-25 2016-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 4,532 20 0.44 870 20.83 0.0250
2016-04-22 2016-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 4,512 4,512 720 0.0197
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.