Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionRussell Investments Group, Ltd.
Latest Disclosed Ownership92,175 shares
Latest Disclosed Value $ 54,199,253
Russell Investments Group, Ltd. reports 3.03% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 8, 2026 - Russell Investments Group, Ltd. filed a 13F-HR form disclosing ownership of 92,175 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $54,199,253 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 89,466 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 3.03% 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)
2026-05-08 2026-03-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 92,175 2,709 3.03 54,199 -2.75 0.0056
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 89,466 3,587 4.18 55,732 3.07 0.0607
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 85,879 1,236 1.46 54,072 16.34 0.0614
2025-08-13 2025-06-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 84,643 -15,197 -15.22 46,476 -2.64 0.0592
2025-05-13 2025-03-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 99,840 -11,103 -10.01 47,735 -16.80 0.0656
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 110,943 48,080 76.48 57,375 69.48 0.0793
2024-11-13 2024-09-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 62,863 1,227 1.99 33,853 1.60 0.0490
2024-08-08 2024-06-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 61,636 -12,623 -17.00 33,320 -26.84 0.0537
2024-05-08 2024-03-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 74,259 5,576 8.12 45,545 32.97 0.0719
2024-02-05 2023-12-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 68,683 1,156 1.71 34,251 23.11 0.0610
2023-11-13 2023-09-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 67,527 21,277 46.00 27,821 30.89 0.0551
2023-08-10 2023-06-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 46,250 9,233 24.94 21,256 63.25 0.0410
2023-05-09 2023-03-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 37,017 -650 -1.73 13,021 1.68 0.0255
2023-02-08 2022-12-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 37,667 -2,778 -6.87 12,805 -1.75 0.0264
2022-11-04 2022-09-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 40,445 790 1.99 13,033 9.58 0.0287
2022-07-29 2022-06-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 39,655 2,407 6.46 11,894 -17.83 0.0243
2022-05-05 2022-03-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 37,248 -15,005 -28.72 14,474 -36.93 0.0252
2022-01-21 2021-12-31 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 52,253 2,868 5.81 22,950 33.99 0.0367
2021-11-08 2021-09-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 49,385 2,132 4.51 17,128 2.99 0.0289
2021-08-04 2021-06-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 47,253 1,044 2.26 16,631 6.02 0.0278
2021-05-10 2021-03-31 13F Martin Marietta Materials Common Stock 573284106 46,209 7,885 20.57 15,687 45.12 0.0277
2021-02-08 2020-12-31 13F Martin Marietta Materials Common Stock 573284106 38,324 -9,480 -19.83 10,810 -2.93 0.0214
2020-11-09 2020-09-30 13F Martin Marietta Materials Common Stock 573284106 47,804 -1,091 -2.23 11,136 10.31 0.0240
2020-08-05 2020-06-30 13F Martin Marietta Materials Common Stock 573284106 48,895 -8,656 -15.04 10,095 -4.48 0.0225
2020-05-06 2020-03-31 13F/A-1 Martin Marietta Materials Common Stock 573284106 57,551 -28,680 -33.26 10,569 -56.02 0.0274
2020-05-06 2020-03-31 13F Martin Marietta Materials Common Stock 573284106 57,551 -28,680 10,569 5,772.3672
2020-01-29 2019-12-31 13F Martin Marietta Materials Common Stock 573284106 86,231 -16,333 -15.92 24,029 -13.97 0.0448
2019-11-01 2019-09-30 13F Martin Marietta Materials Common Stock 573284106 102,564 -2,924 -2.77 27,931 15.99 0.0542
2019-08-09 2019-06-30 13F Martin Marietta Materials Common Stock 573284106 105,488 -12,146 -10.33 24,080 2.56 0.0450
2019-05-13 2019-03-31 13F Martin Marietta Materials Common Stock 573284106 117,634 13,455 12.92 23,478 32.91 0.0434
2019-02-11 2018-12-31 13F Martin Marietta Materials Common Stock 573284106 104,179 16,774 19.19 17,665 9.44 0.0395
2018-10-26 2018-09-30 13F Martin Marietta Materials Common Stock 573284106 87,405 13,863 18.85 16,142 -1.25 0.0306
2018-08-08 2018-06-30 13F MARTIN MARIETTA MATERIALS Common Stock 573284106 73,542 -9,776 -11.73 16,347 -5.25 0.0341
2018-05-11 2018-03-31 13F MARTIN MARIETTA MATLS INC COM Common Stocks 573284106 83,318 19,874 31.33 17,252 25.04 0.0292
2018-02-06 2017-12-31 13F MARTIN MARIETTA MATLS INC COM Common Stocks 573284106 63,444 2,401 3.93 13,797 9.60 0.0231
2017-11-07 2017-09-30 13F MARTIN MARIETTA MATLS INC COM Common Stocks 573284106 61,043 -13,512 -18.12 12,589 -24.14 0.0215
2017-07-25 2017-06-30 13F MARTIN MARIETTA MATLS INC COM Common Stocks 573284106 74,555 -17,960 -19.41 16,594 -17.82 0.0295
2017-04-26 2017-03-31 13F MARTIN MARIETTA MATLS INC COM Common Stocks 573284106 92,515 -1,239 -1.32 20,192 -4.21 0.0370
2017-01-23 2016-12-31 13F MARTIN MARIETTA MATLS INC COM Common Stocks 573284106 93,754 93,754 21,079 0.0411
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.