Martin Marietta Materials, Inc.
US ˙ NYSE ˙ US5732841060

SecurityMLM / Martin Marietta Materials, Inc.
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership917 shares
Latest Disclosed Value $ 539,767
Advisory Services Network, LLC reports 5.95% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 917 shares of Martin Marietta Materials, Inc. (US:MLM) valued at $539,820 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 975 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -5.95% during the quarter. The current value of the position is $532,649 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)
2026-05-15 2026-03-31 13F MARTIN MARIETTA MATERIALS Stock 573284106 917 -58 -5.95 540 -11.20 0.0050
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATERIALS Stock 573284106 975 -735 -42.98 607 -43.64 0.0086
2025-11-18 2025-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 1,710 -198 -10.38 1,078 -1.73 0.0158
2025-08-19 2025-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 1,908 251 15.15 1,097 38.38 0.0177
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 1,657 161 10.76 792 2.59 0.0152
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 1,496 92 6.55 773 1.58 0.0144
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 1,404 0 0.00 761 0.00 0.0157
2024-08-13 2024-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 1,404 180 14.71 761 1.20 0.0157
2024-05-06 2024-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 1,224 165 15.58 751 42.23 0.0167
2024-02-09 2023-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 1,059 151 16.63 528 41.94 0.0129
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 908 193 26.99 373 12.73 0.0100
2023-08-09 2023-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 715 354 98.06 330 157.81 0.0088
2023-05-17 2023-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 361 -350 -49.23 128 -46.67 0.0036
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 711 -224 -23.96 240 -20.27 0.0074
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 935 -133 -12.45 301 -5.94 0.0106
2022-08-02 2022-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 1,068 -148 -12.17 320 -31.62 0.0109
2022-05-23 2022-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 1,216 -102 -7.74 468 -19.45 0.0138
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 1,318 75 6.03 581 37.03 0.0167
2021-11-05 2021-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 1,243 267 27.36 424 23.26 0.0135
2021-08-12 2021-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 976 -1,882 -65.85 344 -64.17 0.0109
2021-05-24 2021-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 2,858 1,773 163.41 960 211.69 0.0357
2021-02-09 2020-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 1,085 4 0.37 308 21.26 0.0124
2020-11-16 2020-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 1,081 0 0.00 254 13.90 0.0120
2020-08-10 2020-06-30 13F MARTIN MARIETTA MATERIALS Stock 573284106 1,081 366 51.19 223 65.19 0.0122
2020-05-15 2020-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 715 9 1.27 135 -31.47 0.0088
2020-02-04 2019-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 706 -3,172 -81.79 197 -77.94 0.0104
2019-11-04 2019-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 3,878 0 0.00 893 0.00 0.0547
2019-08-01 2019-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 3,878 -2,803 -41.95 893 -33.56 0.0548
2019-05-20 2019-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 6,681 2,706 68.08 1,344 96.78 0.0944
2019-02-15 2018-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 3,975 -61 -1.51 683 -6.95 0.0596
2018-11-02 2018-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 4,036 210 5.49 734 -7.21 0.0536
2018-07-27 2018-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 3,826 -2,681 -41.20 791 -41.36 0.0603
2018-04-23 2018-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 6,507 346 5.62 1,349 -0.95 0.1078
2018-02-08 2017-12-31 13F MARTIN MARIETTA MATLS Stock 573284106 6,161 2,468 66.83 1,362 78.74 0.1187
2017-10-12 2017-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 3,693 -1,525 -29.23 762 -34.37 0.0872
2017-08-17 2017-06-30 13F MARTIN MARIETTA MATLS INC COM Stock 573284106 5,218 -1,060 -16.88 1,161 -15.26 0.1513
2017-04-28 2017-03-31 13F MARTIN MARIETTA MATLS INC COM Stock 573284106 6,278 2,553 68.54 1,370 105.40 0.1990
2016-10-07 2016-09-30 13F MARTIN MARIETTA MATLS Stock 573284106 3,725 -209 -5.31 667 -11.66 0.1254
2016-07-27 2016-06-30 13F MARTIN MARIETTA MATLS Stock 573284106 3,934 1,765 81.37 755 118.21 0.1716
2016-04-21 2016-03-31 13F MARTIN MARIETTA MATLS Stock 573284106 2,169 1,885 663.73 346 787.18 0.0945
2016-01-27 2015-12-31 13F MARTIN MARIETTA MATLS INC COM Stock 573284106 284 -4,012 -93.39 39 -94.03 0.0125
2015-10-01 2015-09-30 13F MARTIN MARIETTA MATLS INC COM Stock 573284106 4,296 -4,239 -49.67 653 -46.78 0.1971
2015-07-02 2015-06-30 13F MARTIN MARIETTA MATLS INC COM Stock 573284106 8,535 3,790 79.87 1,227 85.63 0.3620
2015-04-08 2015-03-31 13F MARTIN MARIETTA MATLS INC COM Stock 573284106 4,745 4,745 661 0.1825
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.