Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionSignaturefd, Llc
Latest Disclosed Ownership1,587 shares
Latest Disclosed Value $ 934,270
Signaturefd, Llc reports 10.44% increase in ownership of MLM / Martin Marietta Materials, Inc.

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 1,587 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $934,270 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 1,437 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 10.44% 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)
2026-04-07 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,587 150 10.44 934 4.36 0.0143
2026-01-20 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,437 167 13.15 895 11.88 0.0137
2025-10-21 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,270 194 18.03 800 35.59 0.0126
2025-07-16 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,076 165 18.11 591 35.63 0.0101
2025-05-02 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 911 76 9.10 436 0.93 0.0082
2025-02-10 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 835 21 2.58 431 -1.60 0.0082
2024-10-21 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 814 -63 -7.18 438 -7.79 0.0083
2024-07-29 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 877 1 0.11 475 -11.55 0.0097
2024-05-03 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 876 53 6.44 538 30.98 0.0114
2024-02-01 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 823 192 30.43 411 58.30 0.0095
2023-11-03 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 631 178 39.29 259 23.92 0.0067
2023-08-01 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 453 107 30.92 209 71.31 0.0053
2023-04-28 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 346 -150 -30.24 123 -26.95 0.0034
2023-01-30 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 496 58 13.24 168 18.44 0.0049
2022-11-08 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 438 -31 -6.61 141 0.71 0.0048
2022-08-10 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 469 37 8.56 140 -15.66 0.0048
2022-05-02 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 432 250 137.36 166 107.50 0.0050
2022-01-25 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 182 63 52.94 80 95.12 0.0025
2021-10-28 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 119 67 128.85 41 127.78 0.0014
2021-07-26 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 52 3 6.12 18 12.50 0.0007
2021-04-30 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 49 13 36.11 16 60.00 0.0007
2021-02-11 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 36 -168 -82.35 10 -79.17 0.0005
2020-11-03 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 204 -15 -6.85 48 6.67 0.0026
2020-07-30 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 219 -167 -43.26 45 -38.36 0.0027
2020-04-23 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 386 16 4.32 73 -29.13 0.0063
2020-02-05 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 370 7 1.93 103 4.04 0.0076
2019-10-16 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 363 11 3.12 99 22.22 0.0081
2019-07-31 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 352 0 0.00 81 14.08 0.0070
2019-05-09 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 352 0 0.00 71 18.33 0.0060
2019-02-13 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 352 -1,669 -82.58 60 -83.70 0.0056
2018-11-14 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,021 1,660 459.83 368 354.32 0.0374
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 361 -78 -17.77 81 -10.99 0.0090
2018-05-08 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 439 439 91 0.0107
2017-02-14 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -87 -100.00 0 -100.00
2016-11-14 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 87 2 2.35 16 0.00 0.0023
2016-07-29 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 85 0 0.00 16 14.29 0.0023
2016-05-12 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 85 21 32.81 14 55.56 0.0024
2016-01-22 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 64 27 72.97 9 50.00 0.0017
2015-10-23 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 37 37 0.00 6 0.0014
2014-11-13 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -37 -100.00 0 -100.00
2014-08-14 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 37 37 5 0.0017
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.