Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionMeeder Asset Management Inc
Latest Disclosed Ownership47 shares
Latest Disclosed Value $ 27,668
Meeder Asset Management Inc reports 67.86% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 7, 2026 - Meeder Asset Management Inc filed a 13F-HR form disclosing ownership of 47 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $27,668 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 28 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 67.86% 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)
2026-05-07 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 47 19 67.86 28 58.82 0.0008
2026-02-11 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 28 28 17 0.0009
2025-08-07 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -25 -100.00 0 -100.00
2025-05-07 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 25 -11 -30.56 12 -38.89 0.0008
2025-02-12 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 36 -2 -5.26 19 -10.00 0.0013
2024-11-07 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 38 1 2.70 20 0.00 0.0014
2024-08-08 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 37 -662 -94.71 20 -95.34 0.0014
2024-05-07 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 699 699 429 0.0271
2024-01-25 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -9,470 -100.00 0 -100.00
2023-11-13 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,470 9,470 3,887 0.3068
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -2,137 -100.00 0 -100.00
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,137 767 55.99 688 67.80 0.0397
2022-08-08 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,370 585 74.52 410 35.76 0.0238
2022-05-10 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 785 785 302 0.0111
2022-02-11 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -233 -100.00 0 -100.00
2021-11-08 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 233 10 4.48 80 2.56 0.0042
2021-08-09 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 223 84 60.43 78 65.96 0.0036
2021-04-28 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 139 35 33.65 47 56.67 0.0024
2021-02-09 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 104 6 6.12 30 30.43 0.0066
2020-11-02 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 98 15 18.07 23 35.29 0.0015
2020-08-11 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 83 -69 -45.39 17 -41.38 0.0011
2020-05-15 2020-03-31 13F Martin Marietta Materials Common Stock 573284106 152 19 14.29 29 -21.62 0.0023
2020-02-13 2019-12-31 13F Martin Marietta Materials Common Stock 573284106 133 -375 -73.82 37 -73.38 0.0023
2019-10-17 2019-09-30 13F Martin Marietta Materials Common Stock 573284106 508 494 3,528.57 139 4,533.33 0.0092
2019-08-05 2019-06-30 13F Martin Marietta Materials Common Stock 573284106 14 14 3 0.0002
2016-10-19 2016-09-30 13F Martin Marietta Materials Common Stock 573284106 0 -3,041 -100.00 0 -100.00
2016-07-22 2016-06-30 13F Martin Marietta Materials Common Stock 573284106 3,041 3,041 0.00 584 0.0546
2016-05-12 2016-03-31 13F Martin Marietta Materials Common Stock 573284106 0 -4,572 -100.00 0 -100.00
2016-01-15 2015-12-31 13F Martin Marietta Materials Common Stock 573284106 4,572 -188 -3.95 624 -13.69 0.0563
2015-10-15 2015-09-30 13F Martin Marietta Materials Common Stock 573284106 4,760 0 0.00 723 7.27 0.0708
2015-07-20 2015-06-30 13F Martin Marietta Materials Common Stock 573284106 4,760 -13 -0.27 674 1.05 0.0684
2015-04-29 2015-03-31 13F Martin Marietta Materials Common Stock 573284106 4,773 4,773 667 0.0715
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.