Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionTd Asset Management Inc
Latest Disclosed Ownership88,796 shares
Latest Disclosed Value $ 52,272,429
Td Asset Management Inc reports 4.02% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 88,796 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $52,272,429 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 92,516 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -4.02% 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)
2026-05-11 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 88,796 -3,720 -4.02 52,272 -9.26 0.0424
2026-02-10 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 92,516 -10,683 -10.35 57,606 -11.44 0.0463
2025-11-10 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 103,199 -8,469 -7.58 65,044 6.11 0.0528
2025-07-28 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 111,668 -9,832 -8.09 61,301 5.52 0.0523
2025-05-07 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 121,500 1,298 1.08 58,093 -6.43 0.0535
2025-02-11 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 120,202 -34,995 -22.55 62,084 -25.80 0.0549
2024-11-01 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 155,197 2,283 1.49 83,668 0.99 0.0738
2024-08-02 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 152,914 4,951 3.35 82,849 -8.80 0.0773
2024-05-08 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 147,963 6,263 4.42 90,840 28.50 0.0845
2024-02-12 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 141,700 4,560 3.33 70,696 25.58 0.0695
2023-10-27 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 137,140 -8,330 -5.73 56,293 -16.18 0.0682
2023-08-09 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 145,470 -4,525 -3.02 67,162 26.11 0.0765
2023-05-10 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 149,995 -5,792 -3.72 53,257 1.15 0.0643
2023-02-07 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 155,787 -3,819 -2.39 52,651 2.32 0.0650
2022-11-07 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 159,606 -992 -0.62 51,458 7.08 0.0644
2022-08-04 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 160,598 19,954 14.19 48,057 -11.22 0.0557
2022-05-10 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 140,644 31,542 28.91 54,132 12.63 0.0320
2022-02-10 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 109,102 44,342 68.47 48,062 117.21 0.0402
2021-11-09 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 64,760 92 0.14 22,127 -5.82 0.0230
2021-08-11 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 64,668 13,245 25.76 23,494 36.05 0.0239
2021-05-14 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 51,423 -94,684 -64.80 17,269 -58.38 0.0193
2021-02-16 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 146,107 -15,121 -9.38 41,490 9.34 0.0504
2020-11-10 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 161,228 -56,388 -25.91 37,947 -15.59 0.0526
2020-08-13 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 217,616 -25,776 -10.59 44,953 -2.40 0.0640
2020-05-15 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 243,392 207,678 581.50 46,057 361.17 0.0779
2020-02-11 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 35,714 -183,238 -83.69 9,987 -83.36 0.0145
2019-11-07 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 218,952 -60,012 -21.51 60,015 -6.51 0.0917
2019-08-01 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 278,964 -13,595 -4.65 64,192 9.06 0.0961
2019-05-08 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 292,559 3,900 1.35 58,857 18.63 0.0898
2019-02-01 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 288,659 -1,075 -0.37 49,612 -5.89 0.0863
2018-11-01 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 289,734 -12,595 -4.17 52,717 -21.92 0.0780
2018-07-31 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 302,329 -63,778 -17.42 67,519 -11.04 0.1029
2018-05-11 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 366,107 54,729 17.58 75,894 10.27 0.1162
2018-02-02 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 311,378 -7,582 -2.38 68,827 4.63 0.1003
2017-11-09 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 318,960 26,825 9.18 65,779 1.16 0.0986
2017-08-01 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 292,135 -3,299 -1.12 65,023 0.85 0.1025
2017-05-05 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 295,434 -5,687 -1.89 64,478 -3.34 0.1028
2017-02-08 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 301,121 200,876 200.39 66,707 271.52 0.1125
2016-11-02 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 100,245 37,897 60.78 17,955 49.99 0.0311
2016-08-04 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 62,348 -7,500 -10.74 11,971 7.45 0.0217
2016-05-05 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 69,848 -3,372 -4.61 11,141 11.41 0.0208
2016-02-04 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 73,220 3,300 4.72 10,000 -5.87 0.0198
2015-11-12 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 69,920 -2,000 -2.78 10,624 4.39 0.0209
2015-08-11 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 71,920 3,373 4.92 10,177 6.20 0.0182
2015-04-28 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 68,547 68,547 0.00 9,583 0.0173
2015-01-30 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -63,849 -100.00 0 -100.00
2014-11-06 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 63,849 24,232 61.17 8,233 57.39 0.0142
2014-08-12 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 39,617 300 0.76 5,231 3.67 0.0089
2014-05-09 2014-03-31 13F MARTIN MARIETTA MATLS COM 573284106 39,317 5,200 15.24 5,046 47.98 0.0092
2014-02-07 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 34,117 -2,500 -6.83 3,410 -5.15 0.0064
2013-11-08 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 36,617 -2,600 -6.63 3,595 -6.87 0.0071
2013-07-24 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 39,217 39,217 3,860 0.0083
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.