Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionSfmg, Llc
Latest Disclosed Ownership1,037 shares
Latest Disclosed Value $ 610,461
Sfmg, Llc ownership in MLM / Martin Marietta Materials, Inc.

On May 12, 2026 - Sfmg, Llc filed a 13F-HR form disclosing ownership of 1,037 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $610,461 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,037 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.00% 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)
2026-05-12 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,037 0 0.00 610 -5.43 0.0412
2026-02-10 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,037 0 0.00 646 -1.23 0.0433
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,037 0 0.00 654 14.76 0.0453
2025-08-12 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,037 13 1.27 569 16.36 0.0427
2025-05-09 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,024 0 0.00 490 -7.39 0.0386
2025-02-11 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,024 0 0.00 529 -4.17 0.0417
2024-11-25 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,024 0 0.00 551 -0.54 0.0447
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,024 0 0.00 555 -11.78 0.0482
2024-05-07 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,024 2 0.20 629 23.38 0.0540
2024-01-30 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,022 -1 -0.10 510 21.48 0.0472
2023-11-06 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,023 1 0.10 420 -11.04 0.0432
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,022 -8 -0.78 472 29.04 0.0486
2023-05-01 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,030 36 3.62 366 8.96 0.0394
2023-01-25 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 994 0 0.00 336 8.06 0.0373
2022-10-20 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 994 -28 -2.74 310 1.31 0.0362
2022-08-08 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,022 28 2.82 306 -20.10 0.0355
2022-04-21 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 994 -51 -4.88 383 -16.74 0.0379
2022-01-31 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,045 -35 -3.24 460 24.66 0.0447
2021-11-01 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,080 -30 -2.70 369 -5.63 0.0409
2021-08-06 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,110 0 0.00 391 4.83 0.0434
2021-05-03 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,110 -56 -4.80 373 12.69 0.0432
2021-02-02 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,166 -27 -2.26 331 17.79 0.0420
2020-11-12 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,193 -69 -5.47 281 7.66 0.0388
2020-08-03 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,262 0 0.00 261 9.21 0.0372
2020-05-08 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,262 -884 -41.19 239 -60.17 0.0358
2020-02-05 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,146 -6 -0.28 600 1.69 0.0734
2019-11-12 2019-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 2,152 -50 -2.27 590 19.68 0.0799
2019-10-29 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,152 -50 590 0.0799
2019-08-05 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,202 -93 -4.05 493 6.71 0.0669
2019-05-13 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,295 0 0.00 462 17.26 0.0668
2019-02-12 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,295 -82 -3.45 394 -6.64 0.0637
2018-11-15 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,377 -8 -0.34 422 -20.83 0.0649
2018-08-08 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,385 0 0.00 533 7.89 0.0864
2018-05-10 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,385 -17 -0.71 494 -6.97 0.0837
2018-02-09 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,402 -7 -0.29 531 6.84 0.0881
2017-11-07 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,409 -10 -0.41 497 -7.62 0.0971
2017-08-07 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,419 1,109 84.66 538 88.11 0.1116
2017-05-01 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,310 -316 -19.43 286 -20.56 0.0579
2017-02-10 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,626 -278 -14.60 360 5.57 0.0767
2016-12-09 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,904 -3,455 -64.47 341 -66.86 0.0748
2016-08-13 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,359 -12,000 -69.13 1,029 -62.84 0.2298
2016-05-16 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 17,359 -9 -0.05 2,769 16.74 0.6098
2016-02-08 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 17,368 -7 -0.04 2,372 -10.15 0.5403
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 17,375 -60 -0.34 2,640 7.01 0.6381
2015-08-12 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 17,435 -15,055 -46.34 2,467 -45.68 0.5518
2015-05-11 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 32,490 15,985 96.85 4,542 149.42 0.3668
2015-02-11 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 16,505 -9 -0.05 1,821 -14.47 0.4052
2014-11-14 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 16,514 16,514 2,129 0.6667
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.