Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionIronsides Asset Advisors, LLC
Latest Disclosed Ownership1,873 shares
Latest Disclosed Value $ 1,102,598
Ironsides Asset Advisors, LLC reports 5.64% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 11, 2026 - Ironsides Asset Advisors, LLC filed a 13F-HR form disclosing ownership of 1,873 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $1,102,598 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,773 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 5.64% 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)
2026-05-11 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,873 100 5.64 1,103 -0.09 0.2765
2026-02-12 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,773 0 0.00 1,104 -1.25 0.2798
2025-11-12 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,773 0 0.00 1,117 14.80 0.2882
2025-08-11 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,773 8 0.45 973 15.42 0.2823
2025-05-07 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,765 -495 -21.90 844 -27.76 0.2476
2025-02-10 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,260 1,428 171.63 1,167 161.07 0.3347
2024-10-31 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 832 -24 -2.80 448 -3.46 0.1303
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 856 0 0.00 464 -11.81 0.1543
2024-05-10 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 856 59 7.40 526 32.24 0.1800
2024-02-12 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 797 -91 -10.25 398 9.07 0.1724
2023-11-01 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 888 0 0.00 365 -11.00 0.1659
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 888 -603 -40.44 410 -22.68 0.1741
2023-05-11 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,491 0 0.00 529 0.2407
2023-02-03 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,491 -40 -2.61 1 -100.00 0.2312
2022-11-04 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,531 0 0.00 493 7.64 0.2223
2022-08-09 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,531 0 0.00 458 -22.24 0.1731
2022-05-12 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,531 0 0.00 589 -12.61 0.1798
2022-02-04 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,531 -30 -1.92 674 26.45 0.1860
2021-11-16 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,561 -106 -6.36 533 -9.04 0.1681
2021-08-06 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,667 0 0.00 586 4.64 0.1745
2021-05-07 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,667 -1,006 -37.64 560 -26.22 0.1740
2021-02-10 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,673 -3,080 -53.54 759 -43.94 0.2393
2020-11-10 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,753 -1,305 -18.49 1,354 -7.13 0.4286
2020-08-07 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,058 0 0.00 1,458 9.13 0.4810
2020-05-11 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,058 0 0.00 1,336 -32.32 0.8129
2020-01-21 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,058 -25 -0.35 1,974 1.70 0.6169
2019-11-07 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,083 0 0.00 1,941 19.08 0.6464
2019-08-01 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,083 -15 -0.21 1,630 14.15 0.5468
2019-05-08 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,098 0 0.00 1,428 17.05 0.4677
2019-02-13 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,098 4,588 182.79 1,220 166.96 0.4429
2018-11-13 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,510 2,510 457 0.1382
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.