Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionNomura Asset Management Co Ltd
Latest Disclosed Ownership21,169 shares
Latest Disclosed Value $ 12,461,767
Nomura Asset Management Co Ltd reports 4.34% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 11, 2026 - Nomura Asset Management Co Ltd filed a 13F-HR form disclosing ownership of 21,169 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $12,461,767 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 20,288 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 4.34% 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)
2026-05-11 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 21,169 881 4.34 12,462 -1.35 0.0201
2026-02-10 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 20,288 48 0.24 12,633 -0.97 0.0320
2025-11-12 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 20,240 6 0.03 12,757 14.85 0.0333
2025-08-11 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 20,234 839 4.33 11,108 19.78 0.0305
2025-05-12 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 19,395 1,035 5.64 9,273 -2.20 0.0284
2025-02-12 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 18,360 94 0.51 9,483 -3.55 0.0285
2024-11-15 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 18,266 968 5.60 9,832 4.90 0.0303
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 17,298 604 3.62 9,372 -8.56 0.0319
2024-05-13 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 16,694 389 2.39 10,249 26.00 0.0372
2024-02-09 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 16,305 521 3.30 8,135 25.54 0.0336
2023-11-03 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 15,784 -244 -1.52 6,479 -12.43 0.0304
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 16,028 631 4.10 7,400 35.36 0.0341
2025-01-10 2023-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 15,397 127 0.83 5,467 5.93 0.0287
2023-05-11 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 15,397 127 5,467 0.0287
2025-01-10 2022-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 15,270 785 5.42 5,161 10.61 0.0300
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 15,270 785 5,161 0.0300
2025-01-10 2022-09-30 13F/A-3 MARTIN MARIETTA MATLS COM 573284106 14,485 508 3.63 4,665 11.55 0.0297
2022-11-14 2022-09-30 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 14,485 508 4,665 0.0297
2022-11-10 2022-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 14,485 508 4,665 0.0297
2022-11-10 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 14,485 508 4,665 0.0188
2025-01-10 2022-06-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 13,977 445 3.29 4,182 -19.70 0.0261
2022-08-12 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 13,977 445 4,182 0.0258
2025-01-10 2022-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 13,532 516 3.96 5,208 -9.16 0.0283
2022-05-13 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 13,532 516 5,208 0.0283
2025-01-10 2021-12-31 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 13,016 293 2.30 5,734 31.88 0.0290
2022-02-01 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 13,016 293 5,734 0.0290
2025-01-10 2021-09-30 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 12,723 -10,127 -44.32 4,347 -45.92 0.0245
2021-11-12 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 12,723 -10,127 4,347 0.0245
2025-01-10 2021-06-30 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 22,850 11,154 95.37 8,039 104.69 0.0465
2021-08-06 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 22,850 11,154 8,038 0.0465
2025-01-10 2021-03-31 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 11,696 -41 -0.35 3,928 17.86 0.0250
2021-05-14 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 11,696 -41 3,928 0.0250
2025-01-10 2020-12-31 13F/A-2 MARTIN MARIETTA MATLS COM 573284106 11,737 919 8.50 3,333 30.82 0.0224
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 11,737 919 3,333 0.0224
2020-11-12 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 10,818 20 0.19 2,547 14.16 0.0196
2020-08-13 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 10,798 -120 -1.10 2,231 7.99 0.0189
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 10,918 828 8.21 2,066 -26.79 0.0213
2020-02-13 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 10,090 -229 -2.22 2,822 -0.21 0.0253
2019-11-13 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 10,319 856 9.05 2,828 29.84 0.0270
2019-08-13 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,463 -687 -6.77 2,178 6.66 0.0215
2019-05-10 2019-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 10,150 610 6.39 2,042 24.51 0.0201
2019-05-10 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 10,150 610 2,042
2019-02-12 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,540 690 7.80 1,640 1.80 0.0183
2018-11-07 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 8,850 -20 -0.23 1,611 -18.68 0.0156
2018-08-03 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,870 -607 -6.40 1,981 0.87 0.0206
2018-05-14 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 9,477 580 6.52 1,964 -0.10 0.0214
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 8,897 436 5.15 1,966 12.66 0.0228
2017-11-13 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 8,461 35 0.42 1,745 -6.98 0.0225
2017-08-14 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,426 563 7.16 1,876 9.32 0.0252
2017-06-28 2017-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 7,863 653 9.06 1,716 7.38 0.0242
2017-05-12 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,863 1,716
2017-02-14 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,210 140 1.98 1,598 26.22 0.0288
2016-11-10 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,070 210 3.06 1,266 -3.87 0.0227
2016-08-12 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,860 510 8.03 1,317 30.01 0.0246
2016-05-13 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,350 470 7.99 1,013 26.15 0.0193
2016-02-12 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,880 0 0.00 803 -10.08 0.0155
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,880 0 0.00 893 7.33 0.0179
2015-08-14 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,880 0 0.00 832 1.22 0.0154
2015-05-13 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,880 -260 -4.23 822 20.70 0.0147
2015-02-13 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,140 0 0.00 681 -14.02 0.0119
2014-11-14 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,140 1,100 21.83 792 18.92 0.0140
2014-08-14 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,040 0 0.00 666 2.94 0.0123
2014-05-14 2014-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,040 0 0.00 647 28.37 0.0118
2014-02-14 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,040 -521 -9.37 504 -7.69 0.0091
2013-11-13 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,561 0 0.00 546 -0.18 0.0103
2013-08-13 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,561 5,561 547 0.0108
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.