Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership54,148 shares
Latest Disclosed Value $ 31,875,577
Neuberger Berman Group LLC reports 150.85% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 54,148 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $31,875,577 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 21,586 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 150.85% 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)
2026-05-14 2026-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 54,148 32,562 150.85 31,876 137.17 0.0124
2026-02-13 2025-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 21,586 2,447 12.79 13,441 11.42 0.0100
2025-11-12 2025-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 19,139 -1,889 -8.98 12,063 4.50 0.0088
2025-08-25 2025-06-30 13F/A-1 MARTIN MARIETTA MATERIALS Common 573284106 21,028 4,225 25.14 11,544 43.68 0.0089
2025-08-13 2025-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 21,028 4,225 11,544 0.0046
2025-05-13 2025-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 16,803 383 2.33 8,034 -5.26 0.0067
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 16,420 -193 -1.16 8,481 -5.17 0.0067
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 16,613 3,275 24.55 8,942 23.75 0.0070
2024-11-14 2024-06-30 13F/A-1 MARTIN MARIETTA MATERIALS Common 573284106 13,338 4,080 44.07 7,227 27.15 0.0059
2024-08-13 2024-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 13,338 4,080 7,227 0.0059
2024-11-14 2024-03-31 13F/A-1 MARTIN MARIETTA MATERIALS Common 573284106 9,258 -270 -2.83 5,684 19.57 0.0047
2024-05-13 2024-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 9,258 -270 5,684 0.0047
2024-11-14 2023-12-31 13F/A-2 MARTIN MARIETTA MATERIALS Common 573284106 9,528 -297 -3.02 4,754 17.85 0.0041
2024-02-09 2023-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 9,528 -297 4,754 0.0041
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 9,825 1,952 24.79 4,033 10.98 0.0037
2023-08-11 2023-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 7,873 737 10.33 3,635 43.47 0.0033
2023-05-12 2023-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 7,136 -188 -2.57 2,534 2.34 0.0023
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 7,324 957 15.03 2,475 20.73 0.0024
2022-11-15 2022-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 6,367 -70 -1.09 2,050 6.44 0.0021
2022-08-15 2022-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 6,437 771 13.61 1,926 -11.69 0.0019
2022-05-23 2022-03-31 13F/A-1 MARTIN MARIETTA MATERIALS Common 573284106 5,666 -15 -0.26 2,181 5.16 0.0018
2022-05-13 2022-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 5,666 -15 1,790 0.0008
2022-02-11 2021-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 5,681 3,050 115.93 2,074 144.86 0.0016
2021-11-12 2021-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 2,631 39 1.50 847 -1.74 0.0007
2021-08-13 2021-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 2,592 -792 -23.40 862 -23.24 0.0008
2021-05-13 2021-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 3,384 1,147 51.27 1,123 80.26 0.0011
2021-02-10 2020-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 2,237 -1,882 -45.69 623 -35.44 0.0006
2020-11-12 2020-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 4,119 1,038 33.69 965 51.73 0.0011
2020-08-13 2020-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 3,081 -542 -14.96 636 -7.15 0.0008
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 3,623 553 18.01 685 -20.16 0.0010
2020-02-12 2019-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 3,070 -646 -17.38 858 -15.80 0.0010
2019-11-13 2019-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 3,716 781 26.61 1,019 50.96 0.0012
2019-08-13 2019-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 2,935 1,247 73.87 675 98.53 0.0008
2019-05-13 2019-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 1,688 -407 -19.43 340 -5.56 0.0004
2019-02-12 2018-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 2,095 -251,822 -99.17 360 -99.22 0.0005
2018-11-16 2018-09-30 13F/A-1 MARTIN MARIETTA MATERIALS Common 573284106 253,917 -472,606 -65.05 46,200 -71.53 0.0523
2018-11-13 2018-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 253,917 -472,606 46,200
2018-08-13 2018-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 726,523 -103,145 -12.43 162,254 -5.66 0.1791
2018-05-08 2018-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 829,668 -2,872 -0.34 171,990 -6.54 0.1965
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 832,540 562,934 208.80 184,025 230.97 0.2115
2017-11-15 2017-09-30 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 269,606 268,154 18,467.91 55,601 17,113.93 0.0696
2017-08-08 2017-06-30 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 1,452 -1,132 -43.81 323 -42.73 0.0004
2017-05-10 2017-03-31 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 2,584 1,310 102.83 564 100.00 0.0007
2017-02-06 2016-12-31 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 1,274 -106 -7.68 282 14.17 0.0004
2016-11-02 2016-09-30 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 1,380 -183 -11.71 247 -17.67 0.0003
2016-08-05 2016-06-30 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 1,563 1,563 0.00 300 0.0004
2016-01-28 2015-12-31 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 0 -70,095 -100.00 0 -100.00
2015-11-10 2015-09-30 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 70,095 -49,312 -41.30 10,651 -36.97 0.0137
2015-07-31 2015-06-30 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 119,407 -6,892 -5.46 16,897 -4.30 0.0188
2015-05-06 2015-03-31 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 126,299 126,299 0.00 17,657 0.0189
2015-02-05 2014-12-31 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 0 -245,525 -100.00 0 -100.00
2014-11-04 2014-09-30 13F MARTIN MARIETTA MATERIALS COMMON STOCK 573284106 245,525 245,525 31,657 0.0325
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.