Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership6,130 shares
Latest Disclosed Value $ 3,608,609
Baird Financial Group, Inc. reports 13.22% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 6,130 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $3,608,609 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 5,414 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 13.22% 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 MATLS COM 573284106 6,130 716 13.22 3,609 7.03 0.0030
2026-02-13 2025-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 5,414 1,028 23.44 3,371 21.96 0.0053
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 4,386 -511 -10.43 2,764 2.83 0.0044
2025-08-13 2025-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 4,897 -350 -6.67 2,688 7.18 0.0047
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 5,247 269 5.40 2,509 -2.45 0.0048
2025-02-14 2024-12-31 13F MARTIN MARIETTA MTLS COMMON 573284106 4,978 1,796 56.44 2,571 50.18 0.0049
2024-11-14 2024-09-30 13F MARTIN MARIETTA MTLS COMMON 573284106 3,182 -2,780 -46.63 1,713 -47.00 0.0033
2024-08-14 2024-06-30 13F MARTIN MARIETTA MTLS COMMON 573284106 5,962 4,117 223.14 3,230 185.34 0.0067
2024-05-14 2024-03-31 13F MARTIN MARIETTA MTLS COMMON 573284106 1,845 -156 -7.80 1,133 13.43 0.0024
2024-02-14 2023-12-31 13F MARTIN MARIETTA MTLS COMMON 573284106 2,001 -488 -19.61 998 -2.25 0.0023
2023-11-13 2023-09-30 13F MARTIN MARIETTA MTLS COMMON 573284106 2,489 -116 -4.45 1,022 -15.06 0.0028
2023-08-11 2023-06-30 13F MARTIN MARIETTA MTLS COMMON 573284106 2,605 78 3.09 1,203 34.00 0.0032
2023-05-15 2023-03-31 13F MARTIN MARIETTA MTLS COMMON 573284106 2,527 871 52.60 897 0.0022
2023-02-13 2022-12-31 13F MARTIN MARIETTA MTLS COMMON 573284106 1,656 -241 -12.70 1 -100.00 0.0015
2022-11-15 2022-09-30 13F MARTIN MARIETTA MTLS COMMON 573284106 1,897 130 7.36 611 15.72 0.0018
2022-08-08 2022-06-30 13F MARTIN MARIETTA MTLS COMMON 573284106 1,767 138 8.47 528 -15.65 0.0015
2022-05-13 2022-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 1,629 47 2.97 626 -10.06 0.0015
2022-02-09 2021-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 1,582 -8 -0.50 696 28.18 0.0016
2021-11-12 2021-09-30 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 1,590 499 45.74 543 41.41 0.0014
2021-08-11 2021-06-30 13F MARTIN MARIETTA MTLS COMMON 573284106 1,091 0 0.00 384 4.92 0.0010
2021-05-13 2021-03-31 13F MARTIN MARIETTA MTLS COMMON 573284106 1,091 66 6.44 366 25.77 0.0010
2021-02-11 2020-12-31 13F MARTIN MARIETTA MTLS COMMON 573284106 1,025 137 15.43 291 18.29 0.0009
2020-08-14 2020-06-30 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 888 -251 -22.04 246 14.42 0.0009
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 1,139 133 13.22 215 -23.49 0.0010
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS INC COM COMMON 573284106 1,006 -108 -9.69 281 -7.87 0.0010
2019-11-14 2019-09-30 13F MARTIN MARIETTA Common 573284106 1,114 -2,585 -69.88 305 -64.16 0.0012
2019-08-14 2019-06-30 13F MARTIN MARIETTA COMMON 573284106 3,699 3,699 851 0.0033
2018-05-14 2018-03-31 13F MARTIN MARIETTA MTLS COMMON 573284106 0 -934 -100.00 0 -100.00
2018-02-09 2017-12-31 13F MARTIN MARIETTA MTLS COMMON 573284106 934 934 207 0.0015
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.