Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionGlobal Trust Asset Management, LLC
Latest Disclosed Ownership1,454 shares
Latest Disclosed Value $ 855,646
Global Trust Asset Management, LLC reports 0.34% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On April 23, 2026 - Global Trust Asset Management, LLC filed a 13F-HR form disclosing ownership of 1,454 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $855,646 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 1,459 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -0.34% 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)
2026-04-23 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,454 -5 -0.34 856 -5.84 0.3272
2026-01-20 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,459 -133 -8.35 908 -9.47 0.3586
2025-10-28 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,592 -79 -4.73 1,003 9.38 0.4538
2025-07-17 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,671 -60 -3.47 917 10.88 0.4905
2025-04-18 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,731 -15 -0.86 828 -8.21 0.5044
2025-01-17 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 902 -4.05 0.3420
2024-10-23 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 940 -0.63 0.3481
2024-07-11 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 946 -11.76 0.3811
2024-04-12 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 1,072 23.10 0.4401
2024-01-16 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 871 21.51 0.3820
2023-10-12 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 717 -11.06 0.3420
2023-07-24 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 806 30.05 0.3621
2023-04-14 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,746 0 0.00 620 5.09 0.2957
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS INC COM Stock 573284106 1,746 0 0.00 590 4.80 0.2980
2022-10-07 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,746 -39 -2.18 562 5.24 0.2931
2022-07-12 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,785 0 0.00 534 -22.27 0.2626
2022-04-15 2022-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 1,785 0 0.00 687 -12.60 0.2754
2022-04-12 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,785 0 687 0.2728
2022-01-18 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,785 0 0.00 786 28.85 0.3095
2021-10-07 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,785 0 0.00 610 -2.87 0.2726
2021-07-13 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,785 -5 -0.28 628 4.49 0.2988
2021-04-14 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,790 -20 -1.10 601 16.93 0.3313
2021-01-13 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,810 0 0.00 514 20.94 0.2825
2020-11-17 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,810 -40 -2.16 425 11.26 0.2717
2020-07-08 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,850 0 0.00 382 15.06 0.2667
2020-04-06 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,850 -55 -2.89 332 -37.71 0.2596
2020-02-13 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,905 -1,214 -38.92 533 -37.66 0.3208
2019-10-15 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,119 0 0.00 855 19.08 0.5671
2019-07-23 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,119 0 0.00 718 14.51 0.4814
2019-04-05 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,119 -138 -4.24 627 11.96 0.4645
2019-01-11 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,257 2,125 187.72 560 171.84 0.4987
2018-10-16 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,132 949 518.58 206 402.44 0.1427
2018-07-18 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 183 0 0.00 41 7.89 0.0308
2018-04-26 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 183 120 190.48 38 171.43 0.0300
2018-02-02 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 63 63 14 0.0099
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.