Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership21,036 shares
Latest Disclosed Value $ 12,383,472
Advisors Asset Management, Inc. reports 5.26% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 21,036 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $12,383,472 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 19,985 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 5.26% 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)
2026-05-15 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 21,036 1,051 5.26 12,383 -0.48 0.2056
2026-02-12 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 19,985 -962 -4.59 12,444 -5.75 0.2089
2025-11-06 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 20,947 5 0.02 13,202 14.84 0.2241
2025-08-12 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 20,942 -2,867 -12.04 11,496 0.99 0.2058
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 23,809 -1,000 -4.03 11,384 -11.16 0.2139
2025-02-10 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 24,809 -186 -0.74 12,814 -4.76 0.2360
2024-11-08 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 24,995 1,253 5.28 13,454 4.59 0.2471
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 23,742 2,233 10.38 12,863 -2.59 0.2509
2024-05-14 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 21,509 3,697 20.76 13,205 48.60 0.2538
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 17,812 1,174 7.06 8,887 30.12 0.1814
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 16,638 462 2.86 6,830 -8.56 0.1473
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 16,176 -2,347 -12.67 7,468 13.56 0.1526
2023-05-12 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 18,523 -1,349 -6.79 6,577 -2.08 0.1338
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 19,872 -7,938 -28.54 6,716 -25.02 0.1384
2022-11-08 2022-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 27,810 856 3.18 8,957 11.05 0.1883
2022-08-08 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 26,954 -3,986 -12.88 8,066 -32.26 0.1530
2022-05-17 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 30,940 -3,376 -9.84 11,908 -21.23 0.1834
2022-02-15 2021-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 34,316 3,370 10.89 15,117 42.96 0.2158
2021-11-12 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 30,946 796 2.64 10,574 -0.31 0.1608
2021-07-30 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 30,150 3,654 13.79 10,607 19.21 0.1565
2021-05-07 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 26,496 4,686 21.49 8,898 43.68 0.1383
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 21,810 2,347 12.06 6,193 35.19 0.1024
2020-11-16 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 19,463 -3,026 -13.46 4,581 -1.40 0.0847
2020-08-12 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 22,489 -1,367 -5.73 4,646 2.92 0.0904
2020-05-15 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 23,856 -3,248 -11.98 4,514 -40.44 0.1074
2020-05-20 2019-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 27,104 -90 -0.33 7,579 1.68 0.1329
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 27,104 -90 7,579 67,081.3158
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 27,194 1,077 4.12 7,454 24.03 0.1373
2019-11-14 2019-06-30 13F/A-1 MARTIN MARIETTA MATERIALS COM 573284106 26,117 5,883 29.07 6,010 47.63 0.1084
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 26,117 5,883 6,010
2019-05-15 2019-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 20,234 -2,745 -11.95 4,071 3.09 0.0725
2019-02-06 2018-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 22,979 -9,121 -28.41 3,949 -32.39 0.0795
2019-01-31 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 22,979 -9,121 3,949
2018-11-15 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 32,100 -4,159 -11.47 5,841 -27.87 0.0955
2018-08-22 2018-06-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 36,259 -4,597 -11.25 8,098 -2.81 0.1375
2018-08-15 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 76,139 35,283 8,098
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 40,856 1,165 2.94 8,332 -5.03 0.1396
2018-02-13 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 39,691 -3,264 -7.60 8,773 -0.97 0.1442
2017-11-07 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 42,955 -2,865 -6.25 8,859 -13.14 0.1484
2017-08-02 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 45,820 2,614 6.05 10,199 8.15 0.1705
2017-05-02 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 43,206 24,422 130.01 9,430 180.32 0.1580
2016-10-31 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 18,784 -2,376 -11.23 3,364 -17.20 0.0552
2016-08-08 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 21,160 4,240 25.06 4,063 50.54 0.0659
2016-05-16 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 16,920 -6,302 -27.14 2,699 -14.91 0.0449
2016-02-10 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 23,222 -6,860 -22.80 3,172 -30.61 0.0503
2015-11-16 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 30,082 -6,589 -17.97 4,571 -11.91 0.0729
2015-08-11 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 36,671 -8,869 -19.48 5,189 -18.49 0.0712
2015-05-13 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 45,540 -1,225 -2.62 6,366 23.40 0.0848
2015-02-05 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 46,765 -5,102 -9.84 5,159 -22.86 0.0692
2014-11-13 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 51,867 26,286 102.76 6,688 97.99 0.0922
2014-08-14 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 25,581 4,666 22.31 3,378 25.86 0.0468
2014-05-15 2014-03-31 13F MARTIN MARIETTA MATLS COM 573284106 20,915 6,240 42.52 2,684 82.96 0.0407
2014-02-03 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 14,675 6,882 88.31 1,467 91.76 0.0236
2013-11-15 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,793 1,601 25.86 765 25.62 0.0136
2013-08-14 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,192 6,192 609 0.0115
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.