Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionWhitener Capital Management, Inc.
Latest Disclosed Ownership2,960 shares
Latest Disclosed Value $ 1,742,493
Whitener Capital Management, Inc. ownership in MLM / Martin Marietta Materials, Inc.

On April 16, 2026 - Whitener Capital Management, Inc. filed a 13F-HR form disclosing ownership of 2,960 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $1,742,493 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 2,960 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.00% 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 2,960 0 0.00 1,742 -5.48 0.3975
2026-01-23 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,960 40 1.37 1,843 0.16 0.4194
2025-10-15 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,920 -30 -1.02 1,840 13.65 0.4406
2025-07-14 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,950 85 2.97 1,619 18.26 0.4289
2025-05-01 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,865 70 2.50 1,370 -5.13 0.3876
2025-01-15 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,795 10 0.36 1,444 -3.74 0.4045
2024-10-29 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,785 740 36.19 1,499 35.41 0.4252
2024-07-17 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,045 80 4.07 1,108 -8.21 0.3356
2024-04-16 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,965 10 0.51 1,206 23.69 0.3949
2024-01-10 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,955 -10 -0.51 975 20.97 0.3529
2023-11-02 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,965 -100 -4.84 807 -15.42 0.3230
2023-07-13 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,065 -5 -0.24 953 29.84 0.3657
2023-04-12 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,070 -5 -0.24 735 4.71 0.3072
2023-03-01 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,075 -145 -6.53 701 -1.96 0.3063
2022-10-28 2022-09-30 13F Martin Marietta Materials COM 573284106 2,220 75 3.50 715 11.54 0.3380
2022-08-09 2022-06-30 13F Martin Marietta Materials COM 573284106 2,145 25 1.18 641 -21.35 0.2889
2022-05-11 2022-03-31 13F Martin Marietta Materials COM 573284106 2,120 30 1.44 815 -11.41 0.3061
2022-02-14 2021-12-31 13F/A-1 Martin Marietta Materials COM 573284106 2,090 730 53.68 920 138.34 0.3289
2021-11-12 2021-09-30 13F Martin Marietta Materials COM 573284106 1,360 -70 -4.90 386 -23.26 0.1776
2021-08-12 2021-06-30 13F Martin Marietta Materials COM 573284106 1,430 70 5.15 503 10.31 0.2003
2021-05-11 2021-03-31 13F Martin Marietta Materials COM 573284106 1,360 0 0.00 456 18.13 0.1977
2021-02-08 2020-12-31 13F Martin Marietta Materials COM 573284106 1,360 10 0.74 386 21.77 0.1767
2020-10-09 2020-09-30 13F Martin Marietta Materials COM 573284106 1,350 0 0.00 317 14.03 0.1527
2020-07-17 2020-06-30 13F Martin Marietta Materials COM 573284106 1,350 25 1.89 278 11.20 0.1447
2020-04-24 2020-03-31 13F Martin Marietta Materials COM 573284106 1,325 25 1.92 250 -31.13 0.1617
2020-02-12 2019-12-31 13F Martin Marietta Materials COM 573284106 1,300 -75 -5.45 363 -3.46 0.1882
2019-11-07 2019-09-30 13F Martin Marietta Materials COM 573284106 1,375 100 7.84 376 28.33 0.2063
2019-08-02 2019-06-30 13F Martin Marietta Materials COM 573284106 1,275 25 2.00 293 16.73 0.1667
2019-05-02 2019-03-31 13F Martin Marietta Materials COM 573284106 1,250 -1,618 -56.42 251 -48.98 0.1642
2019-02-05 2018-12-31 13F Martin Marietta Materials COM 573284106 2,868 -1,690 -37.08 492 -40.65 0.3623
2018-11-07 2018-09-30 13F Martin Marietta Materials COM 573284106 4,558 375 8.96 829 -11.24 0.5440
2018-08-08 2018-06-30 13F Martin Marietta Materials COM 573284106 4,183 -135 -3.13 934 4.36 0.7334
2018-04-23 2018-03-31 13F Martin Marietta Materials COM 573284106 4,318 75 1.77 895 -4.48 0.6846
2018-04-23 2017-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 4,243 4,243 937 0.8057
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.