Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionMader & Shannon Wealth Management, Inc.
Latest Disclosed Ownership13,402 shares
Latest Disclosed Value $ 7,889,489
Mader & Shannon Wealth Management, Inc. reports 15.52% increase in ownership of MLM / Martin Marietta Materials, Inc.

On April 13, 2026 - Mader & Shannon Wealth Management, Inc. filed a 13F-HR form disclosing ownership of 13,402 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $7,889,489 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 11,601 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 15.52% 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.

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)
2026-04-13 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 13,402 1,801 15.52 7,889 7.91 3.6513
2026-01-29 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 11,601 0 0.00 7,312 0.00 3.5837
2025-11-12 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 11,601 232 2.04 7,312 17.14 3.5837
2025-07-31 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 11,369 51 0.45 6,241 15.34 3.3994
2025-05-05 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 11,318 136 1.22 5,411 -6.30 3.0875
2025-02-03 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 11,182 -318 -2.77 5,776 -6.69 3.5710
2024-11-12 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 11,500 4,179 57.08 6,190 56.05 3.5991
2024-08-01 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,321 -503 -6.43 3,967 -17.43 2.3844
2024-05-13 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,824 -1,810 -18.79 4,803 -0.06 2.6940
2024-01-24 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,634 274 2.93 4,806 25.09 2.7340
2023-11-07 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,360 -65 -0.69 3,842 -11.70 2.5255
2023-08-08 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,425 129 1.39 4,351 31.85 2.6870
2023-05-10 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 9,296 -195 -2.05 3,301 2.87 2.1770
2023-01-24 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,491 2,297 31.93 3,208 38.45 2.1233
2022-10-27 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,194 137 1.94 2,317 9.71 2.5243
2022-07-26 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,057 -7,770 -52.40 2,112 -62.99 1.2619
2022-05-05 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 14,827 7,801 111.03 5,707 84.39 3.0975
2022-01-28 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,026 105 1.52 3,095 30.87 1.7128
2021-11-01 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,921 -115 -1.63 2,365 -4.44 1.5109
2021-08-11 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,036 305 4.53 2,475 9.51 1.2751
2021-05-03 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 6,731 558 9.04 2,260 28.92 1.3222
2021-02-02 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,173 227 3.82 1,753 25.30 1.1616
2020-11-05 2020-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 5,946 133 2.29 1,399 16.58 1.0942
2020-08-13 2020-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 5,813 268 4.83 1,200 14.39 0.9768
2020-05-12 2020-03-31 13F MARTIN MARIETTA MATERIALS COM 573284106 5,545 14 0.25 1,049 -32.15 0.9282
2020-02-11 2019-12-31 13F MARTIN MARIETTA MATERIALS COM 573284106 5,531 477 9.44 1,546 11.62 1.2452
2019-11-07 2019-09-30 13F MARTIN MARIETTA MATERIALS COM 573284106 5,054 -353 -6.53 1,385 11.33 1.0971
2019-08-13 2019-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 5,407 5,407 1,244 1.0577
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.