Martin Marietta Materials, Inc.
US ˙ NYSE ˙ US5732841060

SecurityMLM / Martin Marietta Materials, Inc.
InstitutionFifth Third Bancorp
Latest Disclosed Ownership21,099 shares
Latest Disclosed Value $ 12,420,797
Fifth Third Bancorp reports 162.26% increase in ownership of MLM / Martin Marietta Materials, Inc.

On May 1, 2026 - Fifth Third Bancorp filed a 13F-HR form disclosing ownership of 21,099 shares of Martin Marietta Materials, Inc. (US:MLM) valued at $12,420,559 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 8,045 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 162.26% during the quarter. The current value of the position is $12,303,882 USD.

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)
2026-05-01 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 21,099 13,054 162.26 12,421 147.95 0.0227
2026-02-02 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 8,045 -409 -4.84 5,009 -5.99 0.0159
2025-11-07 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 8,454 366 4.53 5,328 20.03 0.0170
2025-07-15 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,088 731 9.94 4,440 26.22 0.0153
2025-04-15 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 7,357 352 5.02 3,518 -2.79 0.0134
2025-01-21 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 7,005 1,382 24.58 3,618 19.56 0.0131
2024-10-17 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,623 1,458 35.01 3,027 34.13 0.0110
2024-07-22 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,165 2,118 103.47 2,257 79.62 0.0086
2024-04-23 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,047 -83 -3.90 1,257 18.27 0.0049
2024-01-19 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,130 70 3.40 1,063 25.68 0.0045
2023-10-31 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,060 821 66.26 846 47.73 0.0039
2023-07-26 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,239 -99 -7.40 572 20.42 0.0025
2023-04-24 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,338 117 9.58 475 15.29 0.0022
2023-01-25 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,221 232 23.46 413 29.15 0.0020
2022-10-25 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 989 188 23.47 319 32.92 0.0017
2022-08-04 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 801 -180 -18.35 240 -36.51 0.0012
2022-04-19 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 981 215 28.07 378 12.17 0.0015
2022-02-01 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 766 34 4.64 337 34.80 0.0013
2021-10-15 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 732 99 15.64 250 12.11 0.0011
2021-08-06 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 633 44 7.47 223 12.63 0.0010
2021-05-07 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 589 205 53.39 198 81.65 0.0009
2021-02-16 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 384 -221 -36.53 109 -23.24 0.0005
2020-11-09 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 605 -157 -20.60 142 -9.55 0.0008
2020-08-05 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 762 -66 -7.97 157 0.00 0.0009
2020-05-05 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 828 89 12.04 157 -24.15 0.0011
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 739 21 2.92 207 5.08 0.0012
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 718 29 4.21 197 23.90 0.0012
2019-08-07 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 689 85 14.07 159 30.33 0.0010
2019-05-14 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 604 -44 -6.79 122 9.91 0.0008
2019-02-14 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 648 179 38.17 111 30.59 0.0008
2018-11-14 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 469 14 3.08 85 -16.67 0.0005
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 455 22 5.08 102 13.33 0.0007
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 433 344 386.52 90 350.00 0.0006
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 89 51 134.21 20 150.00 0.0001
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 38 -1 -2.56 8 -11.11 0.0001
2017-08-11 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 39 -225 -85.23 9 -84.48 0.0001
2017-05-12 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 264 -32 -10.81 58 -12.12 0.0004
2017-02-13 2016-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 296 46 18.40 66 46.67 0.0005
2017-02-09 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 250 0 45 0.0004
2016-11-10 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 250 -13 -4.94 45 -10.00 0.0004
2016-08-11 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 263 -53 -16.77 50 0.00 0.0004
2016-05-13 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 316 -281 -47.07 50 -39.02 0.0004
2016-02-16 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 597 -13 -2.13 82 -11.83 0.0007
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 610 46 8.16 93 16.25 0.0009
2015-08-14 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 564 276 95.83 80 100.00 0.0007
2015-05-14 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 288 -4 -1.37 40 25.00 0.0003
2015-02-13 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 292 11 3.91 32 -11.11 0.0003
2014-11-17 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 281 223 384.48 36 350.00 0.0003
2014-08-14 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 58 -12,764 -99.55 8 -99.51 0.0001
2014-05-15 2014-03-31 13F MARTIN MARIETTA MATLS COM 573284106 12,822 -644 -4.78 1,646 22.29 0.0155
2014-02-14 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 13,466 -313 -2.27 1,346 -0.52 0.0130
2013-11-14 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 13,779 41 0.30 1,353 0.07 0.0139
2013-08-14 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 13,738 13,738 1,352 0.0144
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.