Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionNorinchukin Bank, The
Latest Disclosed Ownership3,463 shares
Latest Disclosed Value $ 2,038,599
Norinchukin Bank, The reports 0.46% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Norinchukin Bank, The filed a 13F-HR form disclosing ownership of 3,463 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $2,038,599 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,447 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.46% 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 MATLS COM 573284106 3,463 16 0.46 2,039 -5.03 0.0208
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,447 197 6.06 2,146 4.79 0.0250
2025-11-14 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,250 21 0.65 2,048 15.58 0.0275
2025-08-14 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,229 847 35.56 1,773 55.71 0.0264
2025-05-14 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,382 218 10.07 1,139 1.88 0.0209
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,164 -69 -3.09 1,118 -6.99 0.0236
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,233 170 8.24 1,202 7.52 0.0284
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,063 40 1.98 1,118 -10.06 0.0319
2024-05-14 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,023 -27 -1.32 1,242 21.53 0.0372
2024-02-13 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,050 -20 -0.97 1,023 20.38 0.0240
2023-11-13 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,070 -386 -15.72 850 -25.07 0.0200
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,456 -485 -16.49 1,134 8.52 0.0191
2023-05-12 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,941 112 3.96 1,044 9.21 0.0206
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,829 2 0.07 956 4.94 0.0206
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,827 -30 -1.05 911 6.55 0.0186
2022-08-10 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,857 -2,664 -48.25 855 -59.76 0.0167
2022-05-12 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,521 236 4.47 2,125 -8.72 0.0283
2022-02-10 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,285 -31 -0.58 2,328 28.19 0.0294
2021-11-09 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,316 158 3.06 1,816 0.06 0.0252
2021-08-11 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,158 -25 -0.48 1,815 4.25 0.0262
2021-05-12 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,183 86 1.69 1,741 20.32 0.0240
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,097 -134 -2.56 1,447 17.55 0.0206
2020-11-12 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,231 71 1.38 1,231 15.48 0.0195
2020-08-12 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,160 -70 -1.34 1,066 7.68 0.0182
2020-05-13 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,230 -3,048 -36.82 990 -57.24 0.0193
2020-02-12 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 8,278 -764 -8.45 2,315 -6.58 0.0302
2019-11-12 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,042 236 2.68 2,478 22.31 0.0350
2019-08-09 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,806 -3,053 -25.74 2,026 -15.09 0.0311
2019-05-10 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 11,859 351 3.05 2,386 20.63 0.0304
2019-02-08 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 11,508 3,412 42.14 1,978 34.28 0.0277
2018-11-08 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 8,096 965 13.53 1,473 -7.53 0.0200
2018-08-10 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,131 1,376 23.91 1,593 33.53 0.0238
2018-05-10 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,755 727 14.46 1,193 7.38 0.0200
2018-02-09 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,028 351 7.50 1,111 15.13 0.0194
2017-11-08 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,677 331 7.62 965 -0.21 0.0187
2017-08-10 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,346 248 6.05 967 8.17 0.0199
2017-05-08 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,098 -8,367 -67.12 894 -67.62 0.0193
2017-02-08 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 12,465 1,724 16.05 2,761 43.50 0.0644
2016-11-08 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 10,741 -1,364 -11.27 1,924 -17.21 0.0462
2016-08-08 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 12,105 8,804 266.71 2,324 340.99 0.0566
2016-05-11 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,301 211 6.83 527 24.88 0.0128
2016-02-09 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,090 -744 -19.41 422 -27.62 0.0107
2015-11-09 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,834 319 9.08 583 17.30 0.0152
2015-07-31 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,515 -150 -4.09 497 -2.93 0.0127
2015-05-08 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,665 19 0.52 512 27.36 0.0124
2015-02-10 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,646 1,175 47.55 402 26.02 0.0098
2014-10-31 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,471 2,471 319 0.0091
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.