Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionAdalta Capital Management LLC
Latest Disclosed Ownership1,015 shares
Latest Disclosed Value $ 597,510
Adalta Capital Management LLC ownership in MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Adalta Capital Management LLC filed a 13F-HR form disclosing ownership of 1,015 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $597,510 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 14, 2026 disclosing 1,015 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)
2026-05-15 2026-03-31 13F Martin Marietta Matr COM 573284106 1,015 0 0.00 598 -5.54 0.1775
2026-02-14 2025-12-31 13F Martin Marietta Matr COM 573284106 1,015 0 0.00 632 -1.10 0.2821
2025-11-17 2025-09-30 13F Martin Marietta Matr COM 573284106 1,015 0 0.00 640 14.72 0.2904
2025-08-12 2025-06-30 13F Martin Marietta Matr COM 573284106 1,015 -10 -0.98 557 13.67 0.2796
2025-05-16 2025-03-31 13F Martin Marietta Matr COM 573284106 1,025 -25 -2.38 490 -9.59 0.2610
2025-02-18 2024-12-31 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 542 -4.07 0.2832
2024-11-15 2024-09-30 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 565 -0.53 0.2915
2024-08-15 2024-06-30 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 569 -11.80 0.3093
2024-05-16 2024-03-31 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 645 23.14 0.3560
2024-02-14 2023-12-31 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 524 0.3168
2023-11-15 2023-09-30 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 0 0.2937
2023-08-24 2023-06-30 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 0 0.3241
2023-05-16 2023-03-31 13F Martin Marietta Matr COM 573284106 1,050 0 0.00 0 0.2608
2023-02-21 2022-12-31 13F Martin Marietta Matr COM 573284106 1,050 -150 -12.50 0 -100.00 0.2504
2022-11-15 2022-09-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 387 7.80 0.2780
2022-08-18 2022-06-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 359 -22.29 0.2331
2022-06-15 2022-03-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 462 -12.67 0.2305
2022-02-15 2021-12-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 529 29.02 0.2439
2021-11-16 2021-09-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 410 -2.84 0.2269
2021-08-17 2021-06-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 422 4.71 0.2298
2021-05-18 2021-03-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 403 18.18 0.2325
2021-02-17 2020-12-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 341 20.92 0.2152
2020-11-17 2020-09-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 282 13.71 0.2058
2020-08-14 2020-06-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 248 9.25 0.1976
2020-05-18 2020-03-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 227 -32.44 0.2061
2020-02-14 2019-12-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 336 2.13 0.2114
2019-11-15 2019-09-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 329 19.20 0.2179
2019-08-14 2019-06-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 276 14.52 0.1814
2019-05-16 2019-03-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 241 16.99 0.1823
2019-02-15 2018-12-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 206 -5.50 0.1924
2018-11-14 2018-09-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 218 -18.66 0.1556
2018-08-14 2018-06-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 268 7.63 0.1893
2018-05-16 2018-03-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 249 -6.04 0.1901
2018-02-14 2017-12-31 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 265 7.29 0.2017
2017-11-24 2017-09-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 247 -7.49 0.2016
2017-08-16 2017-06-30 13F Martin Marietta Matr COM 573284106 1,200 0 0.00 267 1.91 0.2155
2017-05-17 2017-03-31 13F Martin Marietta Matr COM 573284106 1,200 1,200 262 0.2217
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.