Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionMn Services Vermogensbeheer B.V.
Latest Disclosed Ownership23,503 shares
Latest Disclosed Value $ 13,836
Mn Services Vermogensbeheer B.V. ownership in MLM / Martin Marietta Materials, Inc.

On April 30, 2026 - Mn Services Vermogensbeheer B.V. filed a 13F-HR form disclosing ownership of 23,503 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $13,836 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 15, 2026 disclosing 23,503 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 MAR MTLS COM 573284106 23,503 0 0.00 14 -7.14 0.0914
2026-01-15 2025-12-31 13F MARTIN MAR MTLS COM 573284106 23,503 -97 -0.41 15 0.00 0.0900
2025-10-31 2025-09-30 13F MARTIN MAR MTLS COM 573284106 23,600 800 3.51 15 16.67 0.0962
2025-07-10 2025-06-30 13F MARTIN MAR MTLS COM 573284106 22,800 22,800 13 0.0871
2024-04-29 2024-03-31 13F MARTIN MAR MTLS COM 573284106 0 -29,300 -100.00 0 -100.00
2024-01-29 2023-12-31 13F MARTIN MAR MTLS COM 573284106 29,300 -300 -1.01 15 16.67 0.1317
2023-10-25 2023-09-30 13F MARTIN MAR MTLS COM 573284106 29,600 0 0.00 12 -7.69 0.1172
2023-08-09 2023-06-30 13F MARTIN MAR MTLS COM 573284106 29,600 -1,100 -3.58 14 30.00 0.1275
2023-04-26 2023-03-31 13F MARTIN MAR MTLS COM 573284106 30,700 900 3.02 11 0.00 0.1123
2023-02-03 2022-12-31 13F MARTIN MAR MTLS COM 573284106 29,800 -4,300 -12.61 10 -99.91 0.1129
2022-11-01 2022-09-30 13F MARTIN MAR MTLS COM 573284106 34,100 -2,600 -7.08 10,983 0.01 0.1157
2022-08-03 2022-06-30 13F MARTIN MAR MTLS COM 573284106 36,700 -7,700 -17.34 10,982 -35.74 0.1024
2022-05-10 2022-03-31 13F MARTIN MAR MTLS COM 573284106 44,400 -3,300 -6.92 17,089 -18.67 0.1137
2022-02-10 2021-12-31 13F MARTIN MAR MTLS COM 573284106 47,700 1,600 3.47 21,013 33.41 0.1231
2021-11-03 2021-09-30 13F MARTIN MAR MTLS COM 573284106 46,100 500 1.10 15,751 16.44 0.0972
2021-08-05 2021-06-30 13F MARTIN MAR MTLS COM 573284106 45,600 45,600 13,527 0.1050
2019-11-12 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -10,739 -100.00 0 -100.00
2019-07-25 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 10,739 0 0.00 2,471 14.40 0.0290
2019-05-06 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 10,739 0 0.00 2,160 33.75 0.0250
2019-02-12 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 10,739 1,000 10.27 1,615 -8.86 0.0245
2018-11-02 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,739 0 0.00 1,772 -18.53 0.0415
2018-08-13 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,739 0 0.00 2,175 7.73 0.0545
2018-05-11 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 9,739 0 0.00 2,019 12.60 0.0526
2018-02-02 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,739 -500 -4.88 1,793 -15.10 0.0564
2017-11-01 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 10,239 0 0.00 2,112 -7.33 0.0555
2017-07-14 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 10,239 8,631 536.75 2,279 594.82 0.0627
2017-04-24 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,608 64 4.15 328 1.23 0.0634
2017-01-11 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,544 0 0.00 324 16.97 0.0661
2016-11-08 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,544 0 0.00 277 3.75 0.0552
2016-08-05 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,544 133 9.43 267 34.85 0.0617
2016-04-28 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,411 1,411 198 0.0460
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.