Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionTimesSquare Capital Management, LLC
Latest Disclosed Ownership73,299 shares
Latest Disclosed Value $ 43,149,655
TimesSquare Capital Management, LLC reports 19.53% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 7, 2026 - TimesSquare Capital Management, LLC filed a 13F-HR form disclosing ownership of 73,299 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $43,149,655 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 91,094 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -19.53% 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)
2026-05-07 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 73,299 -17,795 -19.53 43,150 -23.93 0.7321
2026-02-06 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 91,094 -4,610 -4.82 56,721 -5.97 0.8544
2025-11-07 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 95,704 -11,741 -10.93 60,320 2.27 0.8626
2025-08-08 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 107,445 -4,485 -4.01 58,983 10.21 0.8505
2025-05-02 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 111,930 18,770 20.15 53,517 11.22 0.8618
2025-02-03 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 93,160 -14,894 -13.78 48,117 -17.27 0.7012
2024-11-04 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 108,054 -1,080 -0.99 58,160 -1.64 0.8710
2024-08-08 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 109,134 -1,320 -1.20 59,129 88,150.75 0.9294
2024-05-07 2024-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 110,454 -10,155 -8.42 68 11.67 0.9860
2024-02-07 2023-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 120,609 -34,867 -22.43 60 -4.76 0.8849
2023-11-17 2023-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 155,476 -7,324 -4.50 64 -16.00 0.9934
2023-08-09 2023-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 162,800 -10,305 -5.95 75 22.95 1.0775
2023-05-10 2023-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 173,105 -11,445 -6.20 61 -1.61 0.8981
2023-02-10 2022-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 184,550 -19,250 -9.45 62 -99.91 0.8875
2022-11-09 2022-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 203,800 900 0.44 65,642 8.11 0.9129
2022-08-05 2022-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 202,900 -7,275 -3.46 60,716 -24.94 0.8466
2022-05-06 2022-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 210,175 -15,025 -6.67 80,894 -18.46 0.9072
2022-02-04 2021-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 225,200 -24,600 -9.85 99,205 16.23 0.8789
2021-11-08 2021-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 249,800 122,100 95.61 85,352 89.98 0.7449
2021-08-09 2021-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 127,700 2,950 2.36 44,926 7.24 0.3675
2021-05-12 2021-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 124,750 -12,300 -8.97 41,894 7.65 0.3589
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 137,050 -75,050 -35.38 38,918 -22.04 0.3161
2020-11-06 2020-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 212,100 -84,900 -28.59 49,920 -18.63 0.4673
2020-08-07 2020-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 297,000 -47,700 -13.84 61,351 -5.94 0.5853
2020-05-08 2020-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 344,700 154,775 81.49 65,228 22.81 0.7779
2020-02-05 2019-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 189,925 -63,575 -25.08 53,111 -23.56 0.4734
2019-11-05 2019-09-30 13F Martin Marietta Materials COM 573284106 253,500 -70,200 -21.69 69,484 -6.72 0.6147
2019-08-02 2019-06-30 13F Martin Marietta Materials COM 573284106 323,700 -149,000 -31.52 74,487 -21.67 0.5730
2019-05-10 2019-03-31 13F Martin Marietta Materials COM 573284106 472,700 33,700 7.68 95,098 26.04 0.7325
2019-02-14 2018-12-31 13F Martin Marietta Materials COM 573284106 439,000 -44,325 -9.17 75,451 -14.20 0.6507
2018-11-14 2018-09-30 13F Martin Marietta Materials COM 573284106 483,325 -74,275 -13.32 87,941 -29.38 0.5829
2018-08-14 2018-06-30 13F Martin Marietta Materials COM 573284106 557,600 -6,500 -1.15 124,529 6.49 0.8331
2018-05-15 2018-03-31 13F Martin Marietta Materials COM 573284106 564,100 -64,615 -10.28 116,938 -15.85 0.7957
2018-02-14 2017-12-31 13F Martin Marietta Materials COM 573284106 628,715 47,520 8.18 138,971 15.94 0.9122
2017-11-09 2017-09-30 13F Martin Marietta Materials COM 573284106 581,195 -48,470 -7.70 119,860 -14.48 0.8033
2017-08-10 2017-06-30 13F Martin Marietta Materials Common Stock 573284106 629,665 -73,885 -10.50 140,151 -8.73 0.9025
2017-05-12 2017-03-31 13F Martin Marietta Materials COM 573284106 703,550 148,365 26.72 153,550 24.85 0.9929
2017-02-13 2016-12-31 13F Martin Marietta Materials COM 573284106 555,185 -63,130 -10.21 122,990 11.06 0.8237
2016-11-10 2016-09-30 13F Martin Marietta Materials COM 573284106 618,315 109,890 21.61 110,746 13.45 0.7155
2016-08-11 2016-06-30 13F Martin Marietta Materials COM 573284106 508,425 -83,175 -14.06 97,618 3.45 0.6451
2016-05-11 2016-03-31 13F Martin Marietta Materials COM 573284106 591,600 419,100 242.96 94,366 300.53 0.6162
2016-02-11 2015-12-31 13F Martin Marietta Materials COM 573284106 172,500 172,500 23,560 0.1485
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.