Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership1,588,934 shares
Latest Disclosed Value $ 931,770,423
Geode Capital Management, Llc reports 2.29% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 1,588,934 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $931,770,423 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 1,553,364 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 2.29% 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 MATERIALS COM 573284106 1,588,934 35,570 2.29 931,770 -3.28 0.0310
2026-02-09 2025-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,553,364 10,743 0.70 963,406 -0.50 0.0595
2025-11-12 2025-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,542,621 21,689 1.43 968,229 16.47 0.0618
2025-08-08 2025-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,520,932 4,666 0.31 831,331 15.04 0.0583
2025-05-13 2025-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,516,266 43,855 2.98 722,643 -4.73 0.0568
2025-02-12 2024-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,472,411 32,082 2.23 758,499 -1.82 0.0588
2024-11-12 2024-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,440,329 -80,834 -5.31 772,589 -6.02 0.0626
2024-08-09 2024-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,521,163 36,628 2.47 822,062 -9.58 0.0721
2024-05-13 2024-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,484,535 59,465 4.17 909,167 28.20 0.0841
2024-02-13 2023-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,425,070 27,705 1.98 709,184 23.90 0.0742
2023-11-13 2023-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,397,365 85,926 6.55 572,400 -5.21 0.0682
2023-08-11 2023-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,311,439 24,502 1.90 603,883 32.46 0.0710
2023-05-15 2023-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,286,937 27,930 2.22 455,900 107,423.35 0.0592
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,259,007 24,646 2.00 425 -99.89 0.0596
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,234,361 -37,436 -2.94 397,104 4.53 0.0602
2022-08-12 2022-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,271,797 37,992 3.08 379,909 -19.81 0.0557
2022-05-13 2022-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,233,805 55,495 4.71 473,759 -8.49 0.0591
2022-02-11 2021-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,178,310 25,083 2.18 517,730 31.73 0.0624
2021-11-12 2021-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,153,227 -5,588 -0.48 393,028 -3.34 0.0529
2021-08-13 2021-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 1,158,815 31,330 2.78 406,608 7.66 0.0560
2021-05-12 2021-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,127,485 104,629 10.23 377,691 30.36 0.0578
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 1,022,856 27,027 2.71 289,720 23.87 0.0486
2020-11-13 2020-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 995,829 4,683 0.47 233,898 14.45 0.0458
2020-08-13 2020-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 991,146 14,704 1.51 204,365 10.82 0.0437
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 976,442 -11,921 -1.21 184,416 -33.14 0.0481
2020-02-20 2019-12-31 13F/A-1 MARTIN MARIETTA MATERIALS COM 573284106 988,363 64,941 7.03 275,831 9.15 0.0576
2020-02-13 2019-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 988,363 64,941 275,831 35,152.2424
2019-11-12 2019-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 923,422 42,723 4.85 252,710 24.92 0.0590
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 880,699 49,698 5.98 202,301 21.23 0.0490
2019-05-14 2019-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 831,001 52,032 6.68 166,873 24.87 0.0432
2019-03-06 2018-12-31 13F/A-1 MARTIN MARIETTA MATERIALS COM 573284106 778,969 55,593 7.69 133,637 1.74 0.0413
2019-02-13 2018-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 778,969 55,593 133,637
2018-11-13 2018-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 723,376 21,493 3.06 131,357 -16.02 0.0370
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 701,883 23,314 3.44 156,416 11.49 0.0481
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 678,569 38,731 6.05 140,295 -0.59 0.0457
2018-02-13 2017-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 639,838 16,802 2.70 141,125 10.06 0.0479
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 623,036 18,999 3.15 128,229 -4.46 0.0473
2017-08-14 2017-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 604,037 8,448 1.42 134,214 3.40 0.0528
2017-06-21 2017-03-31 13F/A-1 MARTIN MARIETTA MATLS INC COM COM 573284106 595,589 46,901 8.55 129,800 6.92 0.0532
2017-05-12 2017-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 595,589 129,800
2017-02-14 2016-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 548,688 27,731 5.32 121,400 30.32 0.0565
2016-11-10 2016-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 520,957 18,434 3.67 93,153 -3.28 0.0469
2016-08-12 2016-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 502,523 -31,061 -5.82 96,311 13.38 0.0524
2016-05-13 2016-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 533,584 495 0.09 84,948 16.91 0.0451
2016-02-12 2015-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 533,089 -5,056 -0.94 72,662 -10.97 0.0414
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 538,145 47,120 9.60 81,619 17.69 0.0495
2015-08-14 2015-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 491,025 19,871 4.22 69,351 5.45 0.0396
2015-05-14 2015-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 471,154 16,973 3.74 65,764 31.42 0.0376
2015-02-12 2014-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 454,181 17,246 3.95 50,040 -11.06 0.0298
2014-11-14 2014-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 436,935 211,576 93.88 56,264 89.12 0.0365
2014-08-13 2014-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 225,359 4,554 2.06 29,751 5.00 0.0192
2014-05-14 2014-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 220,805 2,317 1.06 28,334 29.79 0.0190
2014-02-14 2013-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 218,488 32,491 17.47 21,831 19.58 0.0151
2013-11-14 2013-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 185,997 12,066 6.94 18,257 6.67 0.0146
2013-08-14 2013-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 173,931 173,931 17,116 0.0150
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.