Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionSevenBridge Financial Group, LLC
Latest Disclosed Ownership1,519 shares
Latest Disclosed Value $ 927,562
SevenBridge Financial Group, LLC reports 0.20% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On April 23, 2026 - SevenBridge Financial Group, LLC filed a 13F-HR form disclosing ownership of 1,519 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $927,562 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 1,522 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -0.20% 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 1,519 -3 -0.20 928 -6.55 0.1450
2026-02-02 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,522 0 0.00 992 6.10 0.1595
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,522 3 0.20 936 0.11 0.1543
2025-09-04 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,519 -45 -2.88 935 8.10 0.1648
2025-05-13 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 865 4.47 0.1702
2025-02-12 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 827 -14.12 0.1565
2024-11-12 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 964 13.03 0.1856
2024-08-09 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 852 -7.79 0.1885
2024-05-10 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 924 18.46 0.2094
2024-01-22 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 780 21.68 0.1843
2023-10-25 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,564 -225 -12.58 642 -22.30 0.1659
2023-07-26 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,789 0 0.00 826 29.92 0.2133
2023-04-20 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,789 0 0.00 635 5.13 0.1751
2023-01-26 2022-12-31 13F Martin Marietta Materials COM 573284106 1,789 472 35.84 605 42.45 0.1768
2022-10-17 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,317 1,317 424 0.1437
2019-10-09 2019-09-30 13F Martin Marietta Materials Equities 573284106 0 -470 -100.00 0 -100.00
2019-07-15 2019-06-30 13F Martin Marietta Materials Equities 573284106 470 0 0.00 108 13.68 0.0387
2019-05-14 2019-03-31 13F Martin Marietta Materials Equities 573284106 470 0 0.00 95 17.28 0.0357
2019-02-14 2018-12-31 13F Martin Marietta Materials Equities 573284106 470 -32 -6.37 81 -10.99 0.0496
2018-11-14 2018-09-30 13F Martin Marietta Materials Equities 573284106 502 0 0.00 91 -18.75 0.0484
2018-08-14 2018-06-30 13F Martin Marietta Materials Equities 573284106 502 -22 -4.20 112 2.75 0.0624
2018-05-11 2018-03-31 13F Martin Marietta Materials Equities 573284106 524 0 0.00 109 -6.03 0.0625
2018-02-16 2017-12-31 13F Martin Marietta Materials Equities 573284106 524 0 0.00 116 7.41 0.0642
2017-11-13 2017-09-30 13F Martin Marietta Materials Equities 573284106 524 0 0.00 108 -7.69 0.0619
2017-08-14 2017-06-30 13F Martin Marietta Materials Common Stock 573284106 524 45 9.39 117 10.38 0.0714
2017-05-15 2017-03-31 13F Martin Marietta Materials CS 573284106 479 66 15.98 106 49.30 0.0696
2017-02-03 2016-12-31 13F Martin Marietta Materials CS 573284106 413 0 0.00 71 0.00 0.0516
2016-12-20 2016-09-30 13F/A-1 Martin Marietta Materials CS 573284106 413 53 14.72 71 2.90 0.0517
2016-11-28 2016-09-30 13F Martin Marietta Materials CS 573284106 413 71
2016-08-15 2016-06-30 13F Martin Marietta Materials CS 573284106 360 360 69 0.0483
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.