Martin Marietta Materials, Inc.
US ˙ NYSE ˙ US5732841060

SecurityMLM / Martin Marietta Materials, Inc.
InstitutionPinnacle Associates Ltd
Latest Disclosed Ownership3,770 shares
Latest Disclosed Value $ 2,219,135
Pinnacle Associates Ltd reports 0.51% increase in ownership of MLM / Martin Marietta Materials, Inc.

On April 21, 2026 - Pinnacle Associates Ltd filed a 13F-HR form disclosing ownership of 3,770 shares of Martin Marietta Materials, Inc. (US:MLM) valued at $2,219,324 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 3,751 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.51% during the quarter. The current value of the position is $2,198,476 USD.

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)
2026-04-21 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,770 19 0.51 2,219 -4.97 0.0284
2026-02-05 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,751 14 0.37 2,335 -0.85 0.0300
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,737 1 0.03 2,355 14.88 0.0313
2025-08-04 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,736 9 0.24 2,051 15.10 0.0297
2025-05-06 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,727 -23 -0.61 1,782 -8.01 0.0261
2025-02-14 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,750 -183 -4.65 1,937 -1.33 0.0263
2024-10-25 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,933 154 4.08 1,962 -4.15 0.0334
2024-07-30 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,779 -7 -0.18 2,047 -11.92 0.0321
2024-04-26 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,786 -147 -3.74 2,324 18.45 0.0366
2024-01-19 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,933 -36 -0.91 1,962 20.44 0.0330
2023-10-24 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,969 148 3.87 1,629 -7.65 0.0303
2023-07-27 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,821 236 6.58 1,764 38.68 0.0306
2023-05-05 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,585 -83 -2.26 1,273 2.66 0.0260
2023-02-01 2022-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 3,668 11 0.30 1,240 5.18 0.0270
2023-01-25 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,658 1 1,345 0.0000
2022-11-01 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,657 -5 -0.14 1,178 7.48 0.0270
2022-08-02 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,662 77 2.15 1,096 -20.58 0.0239
2022-05-05 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,585 50 1.41 1,380 -11.37 0.0244
2022-02-02 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,535 -46 -1.28 1,557 27.21 0.0269
2021-10-19 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,581 40 1.13 1,224 -1.77 0.0226
2021-08-02 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 3,541 -100 -2.75 1,246 1.88 0.0225
2021-05-12 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 3,641 100 2.82 1,223 21.57 0.0233
2021-01-26 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,541 0 0.00 1,006 20.77 0.0204
2020-10-23 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 3,541 1,050 42.15 833 61.75 0.0198
2020-08-14 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 2,491 0 0.00 515 9.34 0.0127
2020-05-13 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,491 1,010 68.20 471 13.77 0.0143
2020-02-03 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,481 0 0.00 414 1.97 0.0091
2019-11-08 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,481 -184 -11.05 406 6.01 0.0096
2019-08-05 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,665 -65 -3.76 383 10.06 0.0090
2019-05-10 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,730 -50 -2.81 348 13.73 0.0079
2019-02-05 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,780 565 46.50 306 38.46 0.0079
2018-11-09 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,215 1,215 221 0.0046
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.