Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionNissay Asset Management Corp /japan/ /adv
Latest Disclosed Ownership7,764 shares
Latest Disclosed Value $ 4,570,512
Nissay Asset Management Corp /japan/ /adv reports 1.40% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Nissay Asset Management Corp /japan/ /adv filed a 13F-HR form disclosing ownership of 7,764 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $4,570,512 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,657 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 1.40% 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 7,764 107 1.40 4,571 -4.13 0.0242
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,657 83 1.10 4,768 -0.13 0.0248
2025-11-14 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,574 -10 -0.13 4,774 14.65 0.0264
2025-08-14 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,584 170 2.29 4,163 17.47 0.0244
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,414 92 1.26 3,545 -8.47 0.0230
2025-02-14 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,322 -95 -1.28 3,872 -3.01 0.0236
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,417 204 2.83 3,992 2.15 0.0253
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,213 188 2.68 3,908 -9.37 0.0259
2024-05-15 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,025 129 1.87 4,313 25.35 0.0299
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,896 328 4.99 3,440 27.60 0.0277
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,568 228 3.60 2,696 -7.89 0.0239
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,340 -136 -2.10 2,927 27.32 0.0252
2023-05-15 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,476 -304 -4.48 2,299 0.35 0.0205
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,780 -64 -0.94 2,291 3.95 0.0219
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,844 263 4.00 2,204 11.93 0.0231
2022-08-15 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,581 61 0.94 1,969 -21.52 0.0196
2022-05-16 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,520 160 2.52 2,509 -10.46 0.0219
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,360 161 2.60 2,802 32.29 0.0215
2021-11-10 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,199 275 4.64 2,118 1.63 0.0179
2021-08-13 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,924 13 0.22 2,084 4.99 0.0183
2021-05-11 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,911 -153 -2.52 1,985 15.27 0.0196
2021-02-08 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,064 -140 -2.26 1,722 17.95 0.0259
2020-10-20 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,204 161 2.66 1,460 16.99 0.0247
2020-07-27 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,043 295 5.13 1,248 14.71 0.0242
2020-05-05 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,748 165 2.96 1,088 -30.30 0.0277
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,583 443 8.62 1,561 10.79 0.0347
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,140 265 5.44 1,409 25.58 0.0349
2019-08-07 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,875 -222 -4.36 1,122 9.46 0.0284
2019-05-03 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,097 234 4.81 1,025 22.61 0.0271
2019-02-06 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,863 238 5.15 836 -0.71 0.0255
2018-10-30 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,625 154 3.44 842 -15.72 0.0227
2018-08-08 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,471 242 5.72 999 13.91 0.0292
2018-05-14 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,229 79 1.90 877 -4.47 0.0274
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,150 4,150 918 0.0280
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.