Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionLegal & General Group Plc
Latest Disclosed Ownership266,538 shares
Latest Disclosed Value $ 156,905,586
Legal & General Group Plc reports 1.76% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 8, 2026 - Legal & General Group Plc filed a 13F-HR form disclosing ownership of 266,538 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $156,905,586 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 271,303 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -1.76% 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 MATLS COM 573284106 266,538 -4,765 -1.76 156,906 -7.12 0.0195
2026-02-09 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 271,303 -3,658 -1.33 168,930 -2.52 0.0375
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 274,961 380 0.14 173,302 14.97 0.0389
2025-08-12 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 274,581 9,364 3.53 150,734 18.87 0.0374
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 265,217 9,502 3.72 126,808 -3.99 0.0345
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 255,715 -3,297 -1.27 132,077 -5.26 0.0349
2025-02-28 2024-09-30 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 259,012 -680 -0.26 139,413 -0.92 0.0367
2024-11-14 2024-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 339,339 -54 182,649 0.0381
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 339,339 -54 182,649 0.0381
2025-05-29 2024-06-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 259,692 -4,930 -1.86 140,701 -13.39 0.0397
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 339,393 -5,329 183,883 0.0412
2025-05-29 2024-03-31 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 264,622 -6,228 -2.30 162,461 20.23 0.0468
2024-07-01 2024-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 344,722 -6,689 211,637 0.0494
2024-05-14 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 340,457 -10,954 209,019 0.0251
2025-05-29 2023-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 270,850 -23,522 -7.99 135,130 11.83 0.0420
2024-02-15 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 351,411 57,039 175,323 0.0450
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 294,372 -17,022 -5.47 120,834 -15.95 0.0422
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 311,394 -6,840 -2.15 143,767 27.24 0.0468
2023-05-15 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 318,234 8,914 2.88 112,992 8.08 0.0404
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 309,320 -17,413 -5.33 104,541 -0.66 0.0401
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 326,733 -6,580 -1.97 105,237 5.51 0.0411
2022-08-22 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 333,313 -20,149 -5.70 99,741 -26.68 0.0353
2022-05-16 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 353,462 -16,391 -4.43 136,044 -16.50 0.0414
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 369,853 -25,527 -6.46 162,928 20.60 0.0493
2021-11-15 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 395,380 -4,955 -1.24 135,093 -4.08 0.0439
2021-08-12 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 400,335 38,752 10.72 140,842 15.99 0.0471
2021-05-17 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 361,583 -18,595 -4.89 121,427 12.48 0.0452
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 380,178 -90,920 -19.30 107,959 -2.63 0.0423
2020-11-13 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 471,098 71,856 18.00 110,878 34.44 0.0496
2020-08-14 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 399,242 5,632 1.43 82,472 10.68 0.0399
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 393,610 11,168 2.92 74,514 -30.33 0.0436
2020-02-13 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 382,442 5,598 1.49 106,946 23.33 0.0510
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 376,844 10,147 2.77 86,716 17.54 0.0466
2019-05-15 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 366,697 65,353 21.69 73,773 42.44 0.0421
2019-02-15 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 301,344 30,279 11.17 51,792 5.01 0.0401
2018-11-20 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 271,065 6,100 2.30 49,320 -16.65 0.0353
2018-08-10 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 264,965 -17,884 -6.32 59,175 0.92 0.0457
2018-05-17 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 282,849 -6,850 -2.36 58,635 -8.43 0.0447
2018-02-13 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 289,699 -15,857 -5.19 64,032 1.62 0.0463
2017-11-09 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 305,556 1,899 0.63 63,013 -6.77 0.0474
2017-08-03 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 303,657 8,698 2.95 67,586 4.99 0.0546
2017-05-12 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 294,959 14,335 5.11 64,373 3.54 0.0546
2017-02-13 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 280,624 -1,646 -0.58 62,171 22.97 0.0580
2016-10-12 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 282,270 -5,621 -1.95 50,558 -8.52 0.0512
2016-08-16 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 287,891 888 0.31 55,269 20.74 0.0582
2016-05-16 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 287,003 -13,907 -4.62 45,775 11.38 0.0507
2016-02-16 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 300,910 39,018 14.90 41,099 3.28 0.0464
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 261,892 231,409 759.14 39,792 822.18 0.0485
2015-07-31 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 30,483 -12,775 -29.53 4,315 -28.67 0.0051
2015-05-14 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 43,258 2,936 7.28 6,049 35.96 0.0072
2015-02-20 2014-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 40,322 2,691 7.15 4,449 -8.31 0.0052
2015-02-17 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 40,322 2,691 4,449 0.0055
2014-11-14 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 37,631 23,641 168.98 4,852 162.70 0.0058
2014-08-13 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 13,990 1,295 10.20 1,847 13.38 0.0022
2014-05-14 2014-03-31 13F MARTIN MARIETTA MATLS COM 573284106 12,695 -550 -4.15 1,629 23.04 0.0020
2014-02-07 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 13,245 1,570 13.45 1,324 15.53 0.0016
2013-11-12 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 11,675 754 6.90 1,146 6.60 0.0015
2013-08-01 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 10,921 10,921 1,075 0.0015
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.