Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionSumitomo Mitsui Trust Holdings, Inc.
Latest Disclosed Ownership127,880 shares
Latest Disclosed Value $ 75,280,398
Sumitomo Mitsui Trust Holdings, Inc. reports 5.06% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On April 30, 2026 - Sumitomo Mitsui Trust Holdings, Inc. filed a 13F-HR form disclosing ownership of 127,880 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $75,280,398 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 134,696 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -5.06% 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)
2026-04-30 2026-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 127,880 -6,816 -5.06 75,280 -10.24 0.0487
2026-01-23 2025-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 134,696 -5,927 -4.21 83,870 -5.37 0.0493
2025-10-27 2025-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 140,623 1,432 1.03 88,632 15.99 0.0510
2025-07-31 2025-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 139,191 4,395 3.26 76,410 18.56 0.0476
2025-04-25 2025-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 134,796 -1,630 -1.19 64,450 -8.53 0.0456
2025-01-28 2024-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 136,426 -544 -0.40 70,464 -4.42 0.0476
2024-11-05 2024-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 136,970 2,066 1.53 73,724 0.87 0.0511
2024-07-19 2024-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 134,904 -13,667 -9.20 73,091 -19.87 0.0540
2024-04-19 2024-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 148,571 682 0.46 91,214 23.62 0.0626
2024-01-30 2023-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 147,889 568 0.39 73,783 22.01 0.0546
2023-10-30 2023-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 147,321 -1,818 -1.22 60,472 -12.17 0.0496
2023-07-31 2023-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 149,139 -23,348 -13.54 68,856 12.43 0.0536
2023-04-27 2023-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 172,487 -2,112 -1.21 61,243 3.79 0.0456
2023-01-30 2022-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 174,599 -1,807 -1.02 59,009 3.85 0.0467
2022-10-21 2022-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 176,406 -441 -0.25 56,819 7.37 0.0467
2022-07-26 2022-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 176,847 5,466 3.19 52,920 -19.77 0.0407
2022-04-27 2022-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 171,381 -986 -0.57 65,963 -13.13 0.0439
2022-02-02 2021-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 172,367 -8,593 -4.75 75,931 22.81 0.0462
2021-10-25 2021-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 180,960 -9,298 -4.89 61,830 -7.63 0.0385
2021-08-02 2021-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 190,258 -11,195 -5.56 66,935 -1.06 0.0396
2021-04-30 2021-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 201,453 -5,950 -2.87 67,652 14.87 0.0423
2021-02-05 2020-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 207,403 -26,586 -11.36 58,896 6.94 0.0380
2020-10-30 2020-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 233,989 -42,123 -15.26 55,072 -3.44 0.0371
2020-07-27 2020-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 276,112 -110,024 -28.49 57,036 -21.94 0.0403
2020-04-27 2020-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 386,136 138,367 55.85 73,069 5.46 0.0628
2020-01-31 2019-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 247,769 4,341 1.78 69,286 3.84 0.0545
2019-10-31 2019-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 243,428 -1,624 -0.66 66,724 18.33 0.0580
2019-07-29 2019-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 245,052 -2,640 -1.07 56,389 13.16 0.0503
2019-05-08 2019-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 247,692 -18,470 -6.94 49,831 11.33 0.0461
2019-02-06 2018-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 266,162 48,488 22.28 44,760 13.01 0.0481
2018-11-07 2018-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 217,674 4,702 2.21 39,606 -16.73 0.0426
2018-08-01 2018-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 212,972 29,354 15.99 47,563 24.96 0.0554
2018-05-01 2018-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 183,618 1,559 0.86 38,064 -5.41 0.0489
2018-02-06 2017-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 182,059 2,569 1.43 40,242 8.72 0.0519
2017-11-07 2017-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 179,490 -1,242 -0.69 37,016 -7.98 0.0522
2017-08-07 2017-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 180,732 -30,957 -14.62 40,227 -12.93 0.0590
2017-05-02 2017-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 211,689 806 0.38 46,201 -1.10 0.0714
2017-01-27 2016-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 210,883 -48,489 -18.69 46,717 0.56 0.0762
2016-10-28 2016-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 259,372 34,272 15.23 46,456 7.49 0.0762
2016-07-29 2016-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 225,100 -33,811 -13.06 43,219 4.65 0.0744
2016-05-06 2016-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 258,911 -4,261 -1.62 41,299 14.30 0.0722
2016-02-09 2015-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 263,172 -11,949 -4.34 36,131 -13.57 0.0646
2015-11-06 2015-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 275,121 -10,186 -3.57 41,805 3.54 0.0809
2015-07-31 2015-06-30 13F Martin Marietta Materials COM 573284106 285,307 4,215 1.50 40,374 2.74 0.0725
2015-05-08 2015-03-31 13F Martin Marietta Materials COM 573284106 281,092 281,092 0.00 39,297 0.0709
2015-02-04 2014-12-31 13F Martin Marietta Materials COM 573284106 0 -229,247 -100.00 0 -100.00
2014-11-07 2014-09-30 13F Martin Marietta Materials COM 573284106 229,247 113,332 97.77 29,559 93.11 0.0593
2014-08-11 2014-06-30 13F Martin Marietta Materials COM 573284106 115,915 -4,168 -3.47 15,307 -0.69 0.0314
2014-05-09 2014-03-31 13F Martin Marietta Materials COM 573284106 120,083 -4,511 -3.62 15,413 23.49 0.0324
2014-02-14 2013-12-31 13F Martin Marietta Materials COM 573284106 124,594 4,833 4.04 12,481 6.16 0.0259
2013-11-07 2013-09-30 13F Martin Marietta Materials COM 573284106 119,761 -13,311 -10.00 11,757 -10.23 0.0254
2013-08-12 2013-06-30 13F Martin Marietta Materials COM 573284106 133,072 133,072 13,097 0.0297
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.