Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionEnsign Peak Advisors, Inc
Latest Disclosed Ownership42,898 shares
Latest Disclosed Value $ 25,253,195
Ensign Peak Advisors, Inc reports 142.05% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 13, 2026 - Ensign Peak Advisors, Inc filed a 13F-HR form disclosing ownership of 42,898 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $25,253,195 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 17,723 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 142.05% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 42,898 25,175 142.05 25,253 128.84 0.0471
2026-02-12 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 17,723 -5,398 -23.35 11,035 -24.27 0.0195
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 23,121 -1,670 -6.74 14,573 7.08 0.0239
2025-08-12 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 24,791 -204 -0.82 13,609 13.88 0.0233
2025-05-14 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 24,995 2,750 12.36 11,951 4.01 0.0229
2025-02-14 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 22,245 1,145 5.43 11,490 1.16 0.0204
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 21,100 -4,795 -18.52 11,357 -19.05 0.0200
2024-08-13 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 25,895 -3,200 -11.00 14,030 -21.46 0.0256
2024-05-14 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 29,095 5,544 23.54 17,863 52.03 0.0326
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 23,551 2,880 13.93 11,750 38.47 0.0233
2023-11-13 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 20,671 1,900 10.12 8,485 -2.09 0.0181
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 18,771 400 2.18 8,666 32.87 0.0176
2023-05-15 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 18,371 1,300 7.62 6,523 13.05 0.0141
2023-02-13 2022-12-31 13F Martin Marietta Materials COM 573284106 17,071 -50 -0.29 5,769 4.62 0.0130
2022-11-14 2022-09-30 13F Martin Marietta Materials COM 573284106 17,121 -215 -1.24 5,514 6.28 0.0137
2022-08-12 2022-06-30 13F Martin Marietta Materials COM 573284106 17,336 115 0.67 5,188 -21.74 0.0123
2022-05-16 2022-03-31 13F Martin Marietta Materials COM 573284106 17,221 -1,530 -8.16 6,629 -19.75 0.0135
2022-02-11 2021-12-31 13F Martin Marietta Materials COM 573284106 18,751 15,456 469.07 8,260 633.57 0.0158
2021-11-12 2021-09-30 13F Martin Marietta Materials COM 573284106 3,295 -926 -21.94 1,126 -24.18 0.0023
2021-08-13 2021-06-30 13F Martin Marietta Materials COM 573284106 4,221 -280 -6.22 1,485 -1.79 0.0030
2021-05-12 2021-03-31 13F Martin Marietta Materials COM 573284106 4,501 -2,901 -39.19 1,512 -28.03 0.0033
2021-02-12 2020-12-31 13F Martin Marietta Materials COM 573284106 7,402 2,121 40.16 2,101 68.89 0.0048
2020-11-12 2020-09-30 13F Martin Marietta Materials COM 573284106 5,281 -5,735 -52.06 1,244 -45.32 0.0031
2020-08-12 2020-06-30 13F Martin Marietta Materials COM 573284106 11,016 1,660 17.74 2,275 28.53 0.0062
2020-05-11 2020-03-31 13F Martin Marietta Materials COM 573284106 9,356 -22,231 -70.38 1,770 -79.96 0.0059
2020-02-14 2019-12-31 13F Martin Marietta Materials COM 573284106 31,587 31,587 8,833 0.0233
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.