Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionRed Spruce Capital, LLC
Latest Disclosed Ownership6,791 shares
Latest Disclosed Value $ 3,997,726
Red Spruce Capital, LLC reports 0.77% increase in ownership of MLM / Martin Marietta Materials, Inc.

On April 9, 2026 - Red Spruce Capital, LLC filed a 13F-HR form disclosing ownership of 6,791 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $3,997,726 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 6, 2026 disclosing 6,739 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.77% 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)
2026-04-09 2026-03-31 13F Martin Marietta Materials, Inc. COM 573284106 6,791 52 0.77 3,998 -4.74 1.6414
2026-01-06 2025-12-31 13F Martin Marietta Materials, Inc. COM 573284106 6,739 130 1.97 4,196 0.74 1.6728
2025-10-06 2025-09-30 13F Martin Marietta Materials, Inc. COM 573284106 6,609 -61 -0.91 4,166 13.77 1.6983
2025-07-08 2025-06-30 13F Martin Marietta Materials, Inc. COM 573284106 6,670 -1 -0.01 3,662 14.80 1.5870
2025-04-08 2025-03-31 13F Martin Marietta Materials, Inc. COM 573284106 6,671 80 1.21 3,190 -6.32 1.4998
2025-01-17 2024-12-31 13F Martin Marietta Materials, Inc. COM 573284106 6,591 186 2.90 3,404 -1.25 1.5109
2024-10-04 2024-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,405 -256 -3.84 3,447 -4.46 1.5676
2024-07-02 2024-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,661 -63 -0.94 3,609 -12.60 1.6756
2024-04-10 2024-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,724 -245 -3.52 4,128 18.76 1.9151
2024-01-05 2023-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,969 11 0.16 3,477 21.71 1.7850
2023-10-03 2023-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,958 -100 -1.42 2,856 -12.34 1.6213
2023-07-05 2023-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,058 0 0.00 3,259 30.01 1.7549
2023-04-06 2023-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,058 -27 -0.38 2,506 4.68 1.4666
2023-01-03 2022-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,085 350 5.20 2,395 10.37 1.5241
2022-10-03 2022-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,735 0 0.00 2,169 7.64 1.5224
2022-07-05 2022-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,735 -52 -0.77 2,015 -22.86 1.3432
2022-04-05 2022-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,787 17 0.25 2,612 -12.41 1.4813
2022-01-03 2021-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,770 -165 -2.38 2,982 25.82 1.6312
2021-10-04 2021-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,935 54 0.78 2,370 -2.11 1.3869
2021-07-06 2021-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 6,881 -176 -2.49 2,421 2.15 1.4286
2021-04-01 2021-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,057 0 0.00 2,370 18.26 1.5066
2021-01-04 2020-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,057 0 0.00 2,004 20.65 1.3916
2020-10-02 2020-09-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,057 -246 -3.37 1,661 10.07 1.3507
2020-07-02 2020-06-30 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,303 0 0.00 1,509 9.19 1.2802
2020-04-06 2020-03-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,303 -80 -1.08 1,382 -33.08 1.4363
2020-01-16 2019-12-31 13F MARTIN MARIETTA MATLS INC COM COM 573284106 7,383 7,383 2,065 1.7217
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.