Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionDynamic Technology Lab Private Ltd
Latest Disclosed Ownership1,115 shares
Latest Disclosed Value $ 656,378
Dynamic Technology Lab Private Ltd ownership in MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Dynamic Technology Lab Private Ltd filed a 13F-HR form disclosing ownership of 1,115 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $656,378 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 16, 2025 disclosing 0 shares of Martin Marietta Materials, Inc..

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 1,115 1,115 656 0.1066
2025-05-16 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -989 -100.00 0 -100.00
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 989 989 511 0.0821
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -1,131 -100.00 0 0.0000
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,131 1,131 1 0.0658
2023-05-12 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -4,838 -100.00 0 -100.00
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 4,838 -3,676 -43.18 1,635 -40.37 0.1635
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 8,514 8,514 2,742 0.2704
2022-05-16 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -2,671 -100.00 0 -100.00
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,671 2,671 1,177 0.1303
2021-08-13 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -2,231 -100.00 0 -100.00
2021-05-14 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,231 2,231 749 0.0846
2020-11-13 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -2,024 -100.00 0 -100.00
2020-08-14 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,024 -4,485 -68.90 418 -66.07 0.0629
2020-05-13 2020-03-31 13F MARTIN MARIETTA MATLS I COM 573284106 6,509 6,509 1,232 0.2403
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -3,098 -100.00 0 -100.00
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,098 3,098 713 0.1200
2019-05-13 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -5,090 -100.00 0 -100.00
2019-02-13 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,090 5,090 875 0.1514
2017-11-08 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -2,830 -100.00 0 -100.00
2017-08-17 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,830 2,830 630 0.1189
2016-05-18 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -5,786 -100.00 0 -100.00
2016-03-01 2015-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 5,786 1,218 26.66 790 13.83 0.4428
2016-03-01 2015-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 4,568 -1,218 -21.05 694 -12.15 0.5949
2016-03-01 2015-06-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 5,786 5,786 211.75 790 285.37 0.6409
2015-05-12 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -1,856 -100.00 0 -100.00
2016-02-24 2014-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 1,856 -1,644 -46.97 205 -40.41 0.2420
2016-02-22 2013-06-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 3,500 -433 -11.01 344 -14.21 0.7429
2016-02-22 2013-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 3,933 1,183 43.02 401 75.88 0.7216
2016-02-17 2012-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 2,750 -3,861 -58.40 228 -54.31 0.4473
2016-02-17 2011-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 6,611 6,611 499 1.6267
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.