Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionPanagora Asset Management Inc
Latest Disclosed Ownership845 shares
Latest Disclosed Value $ 497,435
Panagora Asset Management Inc ownership in MLM / Martin Marietta Materials, Inc.

On May 14, 2026 - Panagora Asset Management Inc filed a 13F-HR form disclosing ownership of 845 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $497,435 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 845 shares of Martin Marietta Materials, Inc.. This represents a change in shares of 0.00% 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 845 0 0.00 497 -5.51 0.0019
2026-02-13 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 845 0 0.00 526 -1.13 0.0019
2025-11-13 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 845 -13 -1.52 533 12.95 0.0021
2025-08-13 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 858 -8 -0.92 471 13.77 0.0021
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 866 -2,878 -76.87 414 -78.58 0.0021
2025-02-13 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 3,744 1,103 41.76 1,934 36.03 0.0089
2024-11-13 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 2,641 -3,551 -57.35 1,422 -57.63 0.0068
2024-07-29 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 6,192 829 15.46 3,355 1.88 0.0169
2024-05-07 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 5,363 -56,195 -91.29 3,293 -89.28 0.0172
2024-02-08 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 61,558 57,493 1,414.34 30,712 1,741.19 0.1718
2023-10-31 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,065 41 1.02 1,669 -10.18 0.0104
2023-08-11 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,024 0 0.00 1,858 30.04 0.0109
2023-05-12 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,024 -2,688 -40.05 1,429 -37.04 0.0090
2023-02-13 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,712 -1,080 -13.86 2,268 -9.64 0.0149
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,792 68 0.88 2,510 8.61 0.0174
2022-08-15 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,724 -284 -3.55 2,311 -25.02 0.0151
2022-05-12 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 8,008 2,164 37.03 3,082 19.74 0.0168
2022-02-10 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 5,844 -1,139 -16.31 2,574 7.88 0.0136
2021-11-10 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,983 -20 -0.29 2,386 -3.17 0.0128
2021-08-11 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,003 -510 -6.79 2,464 -2.34 0.0132
2021-05-12 2021-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 7,513 -350 -4.45 2,523 12.99 0.0142
2021-02-10 2020-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 7,863 -694 -8.11 2,233 10.87 0.0132
2020-11-13 2020-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 8,557 -2,285 -21.08 2,014 -10.09 0.0126
2020-08-12 2020-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 10,842 138 1.29 2,240 10.56 0.0143
2020-05-14 2020-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 10,704 4,018 60.10 2,026 8.34 0.0143
2020-02-12 2019-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,686 0 0.00 1,870 2.02 0.0085
2019-11-12 2019-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,686 -329 -4.69 1,833 13.57 0.0085
2019-08-09 2019-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 7,015 -997 -12.44 1,614 0.12 0.0072
2019-05-15 2019-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 8,012 -1,523 -15.97 1,612 -1.65 0.0072
2019-02-14 2018-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 9,535 3,543 59.13 1,639 50.37 0.0076
2018-11-13 2018-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 5,992 -1,905 -24.12 1,090 -38.21 0.0041
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 7,897 1,307 19.83 1,764 29.14 0.0070
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,590 385 6.20 1,366 -0.44 0.0054
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,205 1,111 21.81 1,372 30.54 0.0051
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 5,094 0 0.00 1,051 -7.32 0.0042
2017-08-14 2017-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 5,094 -674 -11.69 1,134 -9.93 0.0046
2017-05-15 2017-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 5,768 -651 -10.14 1,259 -11.46 0.0052
2017-02-14 2016-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,419 141 2.25 1,422 26.51 0.0065
2016-11-14 2016-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,278 -1,256 -16.67 1,124 -22.32 0.0054
2016-08-15 2016-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 7,534 -13,059 -63.41 1,447 -55.95 0.0072
2016-05-16 2016-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 20,593 14,370 230.92 3,285 286.47 0.0163
2016-02-12 2015-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,223 128 2.10 850 -8.21 0.0042
2015-11-13 2015-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,095 -658 -9.74 926 -3.14 0.0049
2015-08-14 2015-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 6,753 -816 -10.78 956 -9.64 0.0048
2015-05-15 2015-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 7,569 2,467 48.35 1,058 87.92 0.0054
2015-02-13 2014-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 5,102 -675 -11.68 563 -24.43 0.0029
2014-11-12 2014-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 5,777 3,665 173.53 745 167.03 0.0036
2014-08-14 2014-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 2,112 0 0.00 279 2.95 0.0014
2014-05-15 2014-03-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 2,112 0 0.00 271 28.44 0.0013
2014-02-21 2013-12-31 13F MARTIN MARIETTA MATERIALS COMMON 573284106 2,112 -700 -24.89 211 -23.55 0.0010
2013-11-14 2013-09-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 2,812 0 0.00 276 -0.36 0.0014
2013-08-14 2013-06-30 13F MARTIN MARIETTA MATERIALS COMMON 573284106 2,812 2,812 277 0.0014
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.