Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionLPL Financial LLC
Latest Disclosed Ownership49,045 shares
Latest Disclosed Value $ 28,871,977
LPL Financial LLC reports 13.19% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 6, 2026 - LPL Financial LLC filed a 13F-HR form disclosing ownership of 49,045 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $28,871,977 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 43,329 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 13.19% 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)
2026-05-06 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 49,045 5,716 13.19 28,872 7.01 0.0077
2026-02-11 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 43,329 -6,517 -13.07 26,979 -14.12 0.0074
2025-11-12 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 49,846 6,271 14.39 31,416 31.33 0.0092
2025-08-12 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 43,575 2,041 4.91 23,921 20.46 0.0080
2025-05-07 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 41,534 2,932 7.60 19,858 -0.40 0.0077
2025-02-11 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 38,602 1,776 4.82 19,938 0.59 0.0081
2024-11-08 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 36,826 5,903 19.09 19,821 18.31 0.0088
2024-08-07 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 30,923 2,204 7.67 16,754 -4.98 0.0083
2024-05-10 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 28,719 2,186 8.24 17,632 33.19 0.0095
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 26,533 3,757 16.50 13,238 41.59 0.0080
2023-11-13 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 22,776 786 3.57 9,349 -7.91 0.0065
2023-07-31 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 21,990 -1,530 -6.51 10,153 21.58 0.0073
2023-05-10 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 23,520 4,983 26.88 8,351 33.30 0.0065
2023-02-07 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 18,537 -27 -0.15 6,265 4.77 0.0054
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 18,564 143 0.78 5,979 8.47 0.0058
2022-08-12 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 18,421 2,583 16.31 5,512 -9.58 0.0052
2022-05-16 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 15,838 879 5.88 6,096 -7.50 0.0052
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 14,959 1,760 13.33 6,590 46.12 0.0055
2021-11-15 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 13,199 1,216 10.15 4,510 6.97 0.0042
2021-08-13 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 11,983 1,892 18.75 4,216 24.40 0.0043
2021-05-14 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 10,091 2,446 31.99 3,389 56.10 0.0039
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,645 784 11.43 2,171 34.43 0.0028
2020-11-09 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,861 12 0.18 1,615 14.13 0.0025
2020-08-13 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,849 1,750 34.32 1,415 46.63 0.0025
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,099 -127 -2.43 965 -33.95 0.0021
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,226 -723 -12.15 1,461 -10.42 0.0027
2019-11-13 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,949 -196 -3.19 1,631 15.35 0.0033
2019-08-09 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,145 218 3.68 1,414 18.62 0.0030
2019-05-08 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,927 -156 -2.56 1,192 13.96 0.0027
2019-02-07 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,083 1,670 37.84 1,046 30.26 0.0028
2018-11-14 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,413 -1,508 -25.47 803 -39.26 0.0019
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,921 -2,965 -33.37 1,322 -28.23 0.0035
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 8,886 -208 -2.29 1,842 -8.36 0.0051
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,094 1,950 27.30 2,010 36.46 0.0061
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,144 170 2.44 1,473 -5.09 0.0052
2017-08-14 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,974 1,992 39.98 1,552 45.32 0.0059
2017-05-15 2017-03-31 13F MARTIN MARIETTA COM 573284106 4,982 130 2.68 1,068 -1.48 0.0073
2017-02-13 2016-12-31 13F MARTIN MARIETTA COM 573284106 4,852 2,432 100.50 1,084 155.06 0.0082
2016-11-16 2016-09-30 13F MARTIN MARIETTA COM 573284106 2,420 1,008 71.39 425 54.55 0.0040
2016-08-15 2016-06-30 13F MARTIN MARIETTA COM 573284106 1,412 -3 -0.21 275 22.22 0.0023
2016-05-16 2016-03-31 13F MARTIN MARIETTA COM 573284106 1,415 1,415 0.00 225 0.0006
2016-02-12 2015-12-31 13F MARTIN MARIETTA COM 573284106 0 -5,089 -100.00 0 -100.00
2015-11-13 2015-09-30 13F MARTIN MARIETTA COM 573284106 5,089 -203 -3.84 836 9.42 0.0046
2015-08-14 2015-06-30 13F MARTIN MARIETTA COM 573284106 5,292 365 7.41 764 12.35 0.0039
2015-05-14 2015-03-31 13F MARTIN MARIETTA COM 573284106 4,927 410 9.08 680 36.55 0.0035
2015-02-13 2014-12-31 13F MARTIN MARIETTA COM 573284106 4,517 -487 -9.73 498 -20.70 0.0027
2014-11-10 2014-09-30 13F MARTIN MARIETTA COM 573284106 5,004 5,004 628 0.0037
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.