Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionCandriam Luxembourg S.C.A.
Latest Disclosed Ownership5,035 shares
Latest Disclosed Value $ 2,964,004
Candriam Luxembourg S.C.A. ownership in MLM / Martin Marietta Materials, Inc.

On April 30, 2026 - Candriam Luxembourg S.C.A. filed a 13F-HR form disclosing ownership of 5,035 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $2,964,004 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on April 30, 2026 disclosing 5,035 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.00% 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 MATLS COM 573284106 5,035 0 0.00 2,964 -5.45 0.0154
2026-04-30 2025-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 5,035 388 8.35 3,135 7.07 0.0156
2026-02-13 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,035 388 3,135
2025-11-06 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,647 161 3.59 2,929 18.93 0.0153
2025-08-08 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,486 430 10.60 2,463 26.97 0.0142
2025-05-14 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,056 -571 -12.34 1,939 -18.84 0.0121
2025-02-07 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,627 0 0.00 2,390 -4.06 0.0138
2024-11-13 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,627 -152 -3.18 2,490 -3.82 0.0143
2024-08-05 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,779 436 10.04 2,589 -2.89 0.0157
2024-05-06 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,343 303 7.50 2,666 32.31 0.0171
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,040 771 23.59 2,016 50.26 0.0139
2023-11-13 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,269 0 0.00 1,342 -11.13 0.0095
2023-08-08 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,269 -201 -5.79 1,509 33.07 0.0109
2023-05-12 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,470 278 8.71 1,134 5.19 0.0079
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,192 -4,371 -57.79 1,079 -55.75 0.0073
2022-11-10 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,563 -1,352 -15.17 2,436 -8.70 0.0172
2022-08-03 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,915 -1,388 -13.47 2,668 -32.71 0.0220
2022-05-13 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 10,303 -2,421 -19.03 3,965 -29.26 0.0270
2022-02-10 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 12,724 0 0.00 5,605 28.94 0.0358
2021-11-09 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 12,724 1,511 13.48 4,347 10.19 0.0296
2021-07-20 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 11,213 -718 -6.02 3,945 21.24 0.0270
2021-04-29 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 11,931 0 0.00 3,254 -3.96 0.0271
2021-01-22 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 11,931 6,652 126.01 3,388 172.79 0.0268
2020-10-19 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,279 152 2.96 1,242 17.28 0.0117
2020-07-23 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,127 -16,922 -76.75 1,059 -82.43 0.0112
2020-05-26 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 22,049 0 0.00 6,027 -2.25 0.0668
2020-02-05 2019-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 22,049 3,653 19.86 6,166 22.29 0.0661
2020-01-21 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 22,049 3,653 6 64,350.0644
2020-02-05 2019-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 18,396 2,702 17.22 5,042 40.25 0.0668
2019-10-21 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 18,396 2,702 5 62,837.7529
2019-08-01 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 15,694 -8,068 -33.95 3,595 -24.81 0.0448
2019-05-02 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 23,762 -8,940 -27.34 4,781 -14.93 0.0612
2019-02-14 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 32,702 -88 -0.27 5,620 -5.80 0.0864
2018-11-07 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 32,790 -4,393 -11.81 5,966 -28.16 0.0793
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 37,183 23,953 181.05 8,304 202.73 0.1314
2018-05-09 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 13,230 8,792 198.11 2,743 179.61 0.0468
2018-02-07 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,438 0 0.00 981 7.21 0.0170
2017-11-03 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,438 0 0.00 915 -7.39 0.0160
2017-07-31 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,438 30 0.68 988 2.70 0.0186
2017-04-21 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,408 -617 -12.28 962 -13.57 0.0186
2017-02-01 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,025 1,894 60.49 1,113 98.40 0.0255
2016-11-15 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,131 745 31.22 561 22.49 0.0135
2016-07-26 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,386 2,386 0.00 458 0.0119
2015-10-19 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -5,160 -100.00 0 -100.00
2015-07-29 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,160 -74,748 -93.54 730 -93.47 0.0152
2015-05-28 2015-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 79,908 -74,410 -48.22 11,174 -34.36 0.2251
2015-04-27 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 79,908 11,171
2015-05-28 2014-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 154,318 154,318 17,024 0.3559
2015-03-26 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 154,318 154,318 17,024 0.3446
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.