Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionDiversified Trust Co
Latest Disclosed Ownership5,743 shares
Latest Disclosed Value $ 3,380,789
Diversified Trust Co reports 0.23% increase in ownership of MLM / Martin Marietta Materials, Inc.

On April 16, 2026 - Diversified Trust Co filed a 13F-HR form disclosing ownership of 5,743 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $3,380,789 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 5,730 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.23% 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)
2026-04-16 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,743 13 0.23 3,381 -5.24 0.0627
2026-01-09 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,730 2 0.03 3,568 -1.19 0.0657
2025-10-20 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,728 -984 -14.66 3,610 -2.01 0.0721
2025-07-11 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,712 6 0.09 3,685 14.91 0.0818
2025-04-24 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,706 32 0.48 3,206 -6.99 0.0793
2025-01-07 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,674 -86 -1.27 3,447 -5.25 0.0840
2024-10-07 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,760 -7 -0.10 3,639 -0.76 0.0917
2024-07-16 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,767 185 2.81 3,666 -9.26 0.1036
2024-04-18 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,582 -926 -12.33 4,041 7.88 0.1218
2024-01-08 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,508 17 0.23 3,746 21.83 0.1259
2023-11-17 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,491 -220 -2.85 3,075 -13.65 0.1163
2023-07-18 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,711 624 8.80 3,560 41.49 0.1299
2023-04-07 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,087 466 7.04 2,516 125,700.00 0.0980
2023-01-17 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,621 1,235 22.93 2 -99.88 0.0932
2022-10-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,386 186 3.58 1,735 11.50 0.0785
2022-07-12 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,200 0 0.00 1,556 -22.24 0.0652
2022-04-07 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,200 0 0.00 2,001 -12.66 0.0698
2022-01-13 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,200 -4 -0.08 2,291 28.85 0.0754
2022-01-13 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,204 0 0.00 1,778 -2.89 0.0639
2021-07-20 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,204 -400 -7.14 1,831 -2.71 0.0660
2021-05-10 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,604 199 3.68 1,882 22.61 0.0726
2021-01-08 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,405 -132 -2.38 1,535 17.81 0.0623
2020-10-15 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,537 -399 -6.72 1,303 6.28 0.0602
2020-07-07 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,936 6 0.10 1,226 9.27 0.0620
2020-04-10 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,930 0 0.00 1,122 -32.33 0.0656
2020-01-09 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,930 154 2.67 1,658 4.74 0.0743
2019-10-09 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,776 185 3.31 1,583 23.00 0.0742
2019-07-12 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 5,591 173 3.19 1,287 18.07 0.0612
2019-05-22 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,418 -1,263 -18.90 1,090 -5.05 0.0531
2019-01-18 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,681 0 0.00 1,148 -5.59 0.0641
2018-11-26 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,681 0 0.00 1,216 -18.50 0.0606
2018-07-23 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,681 -6 -0.09 1,492 127.44 0.0950
2013-10-18 2013-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 6,687 -1,420 -17.52 656 -17.79 0.0693
2013-07-23 2013-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 8,107 8,107 798 0.0949
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.