Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionSmithfield Trust Co
Latest Disclosed Ownership175 shares
Latest Disclosed Value $ 103
Smithfield Trust Co ownership in MLM / Martin Marietta Materials, Inc.

On May 8, 2026 - Smithfield Trust Co filed a 13F-HR form disclosing ownership of 175 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $103 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 175 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 0.0045
2026-02-09 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 0.0048
2025-11-07 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 0.0049
2025-08-08 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 0.0045
2025-05-09 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 0.0042
2025-02-06 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 0.0045
2024-11-12 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 175 -47 -21.17 0 0.0045
2024-07-31 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 222 0 0.00 0 0.0063
2024-05-07 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 222 0 0.00 0 0.0071
2024-02-07 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 222 5 2.30 0 0.0060
2023-11-06 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 217 11 5.34 0 0.0055
2023-08-08 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 206 31 17.71 0 0.0059
2023-05-11 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 0.0042
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 0 -100.00 0.0040
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 56 14.29 0.0040
2022-08-11 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 175 0 0.00 49 -28.99 0.0034
2022-05-16 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 175 2 1.16 69 -12.66 0.0044
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 173 0 0.00 79 25.40 0.0049
2021-11-12 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 173 0 0.00 63 3.28 0.0042
2021-07-26 2021-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 173 0 0.00 61 5.17 0.0040
2021-05-14 2021-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 173 0 0.00 58 18.37 0.0040
2021-02-12 2020-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 173 0 0.00 49 22.50 0.0036
2020-11-16 2020-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 173 44 34.11 40 48.15 0.0033
2020-08-14 2020-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 0 0.00 27 12.50 0.0024
2020-05-05 2020-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 0 0.00 24 -33.33 0.0025
2020-02-13 2019-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 0 0.00 36 2.86 0.0033
2019-10-30 2019-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 0 0.00 35 16.67 0.0035
2019-08-06 2019-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 0 0.00 30 15.38 0.0031
2019-04-30 2019-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 0 0.00 26 13.04 0.0028
2019-02-04 2018-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 0 0.00 23 0.00 0.0027
2018-11-06 2018-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 129 -107 -45.34 23 -56.60 0.0025
2018-07-16 2018-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 236 52 28.26 53 35.90 0.0061
2018-05-10 2018-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 184 0 0.00 39 -4.88 0.0047
2018-02-02 2017-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 184 -449 -70.93 41 -68.46 0.0050
2017-11-03 2017-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 633 -980 -60.76 130 -63.79 0.0176
2017-07-31 2017-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 1,613 -5 -0.31 359 1.70 0.0526
2017-05-01 2017-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 1,618 -7 -0.43 353 -1.94 0.0553
2017-02-08 2016-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 1,625 -210 -11.44 360 9.42 0.0604
2016-11-03 2016-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 1,835 -117 -5.99 329 -12.27 0.0587
2016-07-29 2016-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 1,952 1,210 163.07 375 215.13 0.0703
2016-05-05 2016-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 742 1 0.13 119 17.82 0.0232
2016-02-04 2015-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 741 0 0.00 101 -9.82 0.0208
2015-11-05 2015-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 741 0 0.00 112 6.67 0.0239
2015-07-24 2015-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 741 121 19.52 105 22.09 0.0207
2015-05-06 2015-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 620 620 0.00 86 0.0170
2015-02-02 2014-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 0 -620 -100.00 0 -100.00
2014-10-21 2014-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 620 -140 -18.42 80 -20.79 0.0162
2014-07-16 2014-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 760 -3,262 -81.10 101 -80.43 0.0198
2014-05-06 2014-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 4,022 70 1.77 516 30.63 0.1030
2014-01-16 2013-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 3,952 166 4.38 395 6.18 0.0801
2013-10-17 2013-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 3,786 14 0.37 372 0.27 0.0852
2013-07-23 2013-06-30 13F/A-1 MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 3,772 3,772 371 0.0888
2013-07-10 2013-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON STOCK 573284106 3,772 3,772 372 0.0001
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.