Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionAqr Capital Management Llc
ManagerCliff Asness
Latest Disclosed Ownership65,460 shares
Latest Disclosed Value $ 37,641,802
Aqr Capital Management Llc reports 34.40% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Aqr Capital Management Llc filed a 13F-HR form disclosing ownership of 65,460 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $37,641,802 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 99,779 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -34.40% 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)
2026-05-15 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 65,460 -34,319 -34.40 37,642 -39.41 0.0032
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 99,779 9,531 10.56 62,129 9.52 0.0326
2025-11-14 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 90,248 23,646 35.50 56,731 55.17 0.0364
2025-08-14 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 66,602 19,784 42.26 36,562 64.99 0.0302
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 46,818 15,162 47.90 22,160 35.54 0.0228
2025-02-14 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 31,656 -7,553 -19.26 16,350 -22.25 0.0211
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 39,209 -30,808 -44.00 21,030 -44.57 0.0290
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 70,017 -31,856 -31.27 37,935 -39.24 0.0581
2024-05-15 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 101,873 49,297 93.76 62,431 138.14 0.1063
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 52,576 29,875 131.60 26,216 181.35 0.0493
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 22,701 14,203 167.13 9,319 138.25 0.0192
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,498 6,191 268.36 3,911 377.53 0.0083
2023-05-15 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,307 2,307 819 0.0018
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -6,124 -100.00 0 -100.00
2022-11-14 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,124 -6,719 -52.32 1,965 -47.78 0.0048
2022-08-15 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 12,843 -36,208 -73.82 3,763 -80.07 0.0085
2022-05-16 2022-03-31 13F MARTIN MARIETTA MATLS COM 573284106 49,051 -33,341 -40.47 18,879 -47.33 0.0358
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 82,392 17,363 26.70 35,845 61.33 0.0650
2021-11-15 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 65,029 34,781 114.99 22,219 110.01 0.0412
2021-08-16 2021-06-30 13F MARTIN MARIETTA MATLS COM 573284106 30,248 19,378 178.27 10,580 189.86 0.0183
2021-05-17 2021-03-31 13F MARTIN MARIETTA MATLS COM 573284106 10,870 -6,348 -36.87 3,650 -24.34 0.0060
2021-02-16 2020-12-31 13F MARTIN MARIETTA MATLS COM 573284106 17,218 -144 -0.83 4,824 18.70 0.0086
2020-11-16 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 17,362 -43,862 -71.64 4,064 -67.34 0.0069
2020-08-17 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 61,224 40,577 196.53 12,445 218.53 0.0201
2020-05-15 2020-03-31 13F MARTIN MARIETTA MATLS COM 573284106 20,647 1,331 6.89 3,907 -27.67 0.0066
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 19,316 10,208 112.08 5,402 117.12 0.0061
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,108 800 9.63 2,488 31.78 0.0029
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,308 217 2.68 1,888 15.97 0.0021
2019-05-14 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 8,091 -920 -10.21 1,628 5.10 0.0017
2019-02-14 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,011 -22 -0.24 1,549 -5.78 0.0018
2018-11-15 2018-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 9,033 -21 -0.23 1,644 -18.69 0.0016
2018-11-14 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 9,054 0 2,022
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 9,054 4,299 90.41 2,022 105.07 0.0020
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 4,755 -1,383 -22.53 986 -27.34 0.0011
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 6,138 -359 -5.53 1,357 1.27 0.0014
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,497 -1,714 -20.87 1,340 -26.70 0.0016
2017-08-14 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 8,211 0 0.00 1,828 2.01 0.0024
2017-05-15 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 8,211 0 0.00 1,792 -1.48 0.0024
2017-02-14 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 8,211 681 9.04 1,819 34.84 0.0025
2016-11-14 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,530 -10,568 -58.39 1,349 -61.18 0.0021
2016-08-15 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 18,098 8,845 95.59 3,475 135.43 0.0061
2016-07-29 2016-03-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 9,253 0 0.00 1,476 16.77 0.0027
2016-05-16 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 9,253 1,476
2016-02-16 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 9,253 2,751 42.31 1,264 27.94 0.0022
2015-11-16 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,502 6,502 0.00 988 0.0020
2015-05-15 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -2,400 -100.00 0 -100.00
2015-04-22 2014-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 2,400 2,400 0.00 265 0.0006
2015-02-17 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 2,400 265
2014-11-14 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -4,600 -100.00 0 -100.00
2014-08-14 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,600 4,600 -4.92 607 27.79 0.0016
2014-02-14 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -4,838 -100.00 0 -100.00
2013-11-14 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 4,838 -62 -1.27 475 -1.45 0.0017
2013-08-14 2013-06-30 13F MARTIN MARIETTA MATLS COM 573284106 4,900 4,900 482 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.