Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionLazard Asset Management Llc
Latest Disclosed Ownership16,881 shares
Latest Disclosed Value $ 9,937,507
Lazard Asset Management Llc reports 6.32% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Lazard Asset Management Llc filed a 13F-HR form disclosing ownership of 16,881 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $9,937,507 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,878 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 6.32% 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 MATLS COM 573284106 16,881 1,003 6.32 9,938 0.52 0.0085
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 15,878 -78 -0.49 9,887 -1.69 0.0168
2025-11-14 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 15,956 211 1.34 10,057 125,600.00 0.0135
2025-08-14 2025-06-30 13F MARTIN MARIETTA Common Stock 573284106 15,745 1,108 7.57 9 33.33 0.0119
2025-05-15 2025-03-31 13F MARTIN MARIETTA Common Stock 573284106 14,637 4,824 49.16 7 20.00 0.0107
2025-02-14 2024-12-31 13F MARTIN MARIETTA Common Stock 573284106 9,813 7,750 375.67 5 400.00 0.0074
2024-11-14 2024-09-30 13F MARTIN MARIETTA Common Stock 573284106 2,063 -1,718 -45.44 1 -50.00 0.0015
2024-08-14 2024-06-30 13F MARTIN MARIETTA Common Stock 573284106 3,781 1,054 38.65 2 100.00 0.0026
2024-07-09 2024-03-31 13F/A-1 MARTIN MARIETTA Common Stock 573284106 2,727 -4,020 -59.58 2 -66.67 0.0020
2024-05-14 2024-03-31 13F MARTIN MARIETTA Common Stock 573284106 2,727 -4,020 2 0.0020
2024-02-14 2023-12-31 13F MARTIN MARIETTA Common Stock 573284106 6,747 -802 -10.62 3 0.00 0.0043
2023-11-14 2023-09-30 13F MARTIN MARIETTA Common Stock 573284106 7,549 -37 -0.49 3 0.00 0.0042
2023-08-15 2023-06-30 13F MARTIN MARIETTA Common Stock 573284106 7,586 2,953 63.74 4 200.00 0.0043
2023-05-15 2023-03-31 13F MARTIN MARIETTA Common Stock 573284106 4,633 1,320 39.84 2 -99.91 0.0022
2023-02-15 2022-12-31 13F MARTIN MARIETTA Common Stock 573284106 3,313 925 38.74 1,119 45.51 0.0015
2022-11-14 2022-09-30 13F MARTIN MARIETTA Common Stock 573284106 2,388 443 22.78 769 32.13 0.0011
2022-08-09 2022-06-30 13F MARTIN MARIETTA Common Stock 573284106 1,945 1,900 4,222.22 582 3,323.53 0.0008
2022-05-13 2022-03-31 13F MARTIN MARIETTA Common Stock 573284106 45 -10,166 -99.56 17 -99.62 0.0000
2022-02-09 2021-12-31 13F MARTIN MARIETTA Common Stock 573284106 10,211 -13,204 -56.39 4,497 -43.78 0.0048
2021-11-15 2021-09-30 13F MARTIN MARIETTA Common Stock 573284106 23,415 -39,910 -63.02 7,999 -64.09 0.0090
2021-08-12 2021-06-30 13F MARTIN MARIETTA Common Stock 573284106 63,325 2,034 3.32 22,277 8.24 0.0250
2021-05-14 2021-03-31 13F MARTIN MARIETTA Common Stock 573284106 61,291 59,652 3,639.54 20,582 4,326.24 0.0249
2021-02-11 2020-12-31 13F MARTIN MARIETTA Common Stock 573284106 1,639 -536 -24.64 465 -9.00 0.0006
2020-11-13 2020-09-30 13F MARTIN MARIETTA Common Stock 573284106 2,175 727 50.21 511 71.48 0.0007
2020-08-13 2020-06-30 13F MARTIN MARIETTA Common Stock 573284106 1,448 -1,536 -51.47 298 -47.07 0.0005
2020-05-14 2020-03-31 13F MARTIN MARIETTA Common Stock 573284106 2,984 -58,591 -95.15 563 -96.73 0.0010
2020-02-13 2019-12-31 13F MARTIN MARIETTA Common Stock 573284106 61,575 55,082 848.33 17,218 867.85 0.0246
2019-11-14 2019-09-30 13F MARTIN MARIETTA Common Stock 573284106 6,493 0 0.00 1,779 19.08 0.0029
2019-08-14 2019-06-30 13F MARTIN MARIETTA Common Stock 573284106 6,493 5,767 794.35 1,494 923.29 0.0024
2019-08-28 2019-03-31 13F/A-1 MARTIN MARIETTA Common Stock 573284106 726 726 146 0.0002
2019-05-13 2019-03-31 13F MARTIN MARIETTA Common Stock 573284106 726 726 146
2019-08-28 2018-12-31 13F/A-1 MARTIN MARIETTA Common Stock 573284106 0 -1,611 -100.00 0 -100.00
2019-08-30 2018-09-30 13F/A-1 MARTIN MARIETTA Common Stock 573284106 1,611 1,454 926.11 293 737.14 0.0005
2018-11-13 2018-09-30 13F MARTIN MARIETTA Common Stock 573284106 1,611 1,454 293
2019-08-30 2018-06-30 13F/A-1 MARTIN MARIETTA Common Stock 573284106 157 31 24.60 35 34.62 0.0001
2018-08-13 2018-06-30 13F MARTIN MARIETTA Common Stock 573284106 157 31 35
2019-08-28 2018-03-31 13F/A-1 MARTIN MARIETTA Common Stock 573284106 126 10 8.62 26 4.00 0.0000
2018-05-14 2018-03-31 13F MARTIN MARIETTA Common Stock 573284106 126 10 26
2019-08-28 2017-12-31 13F/A-1 MARTIN MARIETTA Common Stock 573284106 116 14 13.73 25 19.05 0.0000
2018-02-13 2017-12-31 13F MARTIN MARIETTA Common Stock 573284106 116 14 25
2019-08-19 2017-09-30 13F/A-1 MARTIN MARIETTA Common Stock 573284106 102 0 0.00 21 -4.55 0.0000
2017-11-13 2017-09-30 13F MARTIN MARIETTA Common Stock 573284106 102 0 21
2019-08-19 2017-06-30 13F/A-1 MARTIN MARIETTA Common Stock 573284106 102 0 0.00 22 0.00 0.0000
2017-08-11 2017-06-30 13F MARTIN MARIETTA Common Stock 573284106 102 0 22
2019-08-13 2017-03-31 13F/A-1 MARTIN MARIETTA Common Stock 573284106 102 -71 -41.04 22 -42.11 0.0000
2017-05-12 2017-03-31 13F MARTIN MARIETTA Common Stock 573284106 102 -71 22
2019-07-30 2016-12-31 13F/A-1 MARTIN MARIETTA Common Stock 573284106 173 173 38 0.0001
2017-02-13 2016-12-31 13F MARTIN MARIETTA Common Stock 573284106 173 38
2014-02-14 2013-12-31 13F MARTIN MARIETTA Common Stock 573284106 0 -33 -100.00 0 -100.00
2013-11-13 2013-09-30 13F MARTIN MARIETTA Common Stock 573284106 33 0 0.00 3 0.00 0.0000
2013-08-13 2013-06-30 13F MARTIN MARIETTA Common Stock 573284106 33 33 3 0.0000
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.