Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionBalyasny Asset Management Llc
Latest Disclosed Ownership900 shares
Latest Disclosed Value $ 529,812
Balyasny Asset Management Llc reports 99.49% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Balyasny Asset Management Llc filed a 13F-HR form disclosing ownership of 900 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $529,812 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 175,911 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -99.49% 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 900 -175,011 -99.49 530 -99.52 0.0006
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 175,911 127,492 263.31 109,533 258.92 0.1390
2025-11-14 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 48,419 48,419 30,518 0.0387
2025-05-15 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -1,396 -100.00 0 -100.00
2025-02-14 2024-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,396 -5,623 -80.11 721 -80.91 0.0011
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATLS COM 573284106 7,019 -348 -4.72 3,778 -5.36 0.0062
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS COM 573284106 7,367 -57,394 -88.62 3,991 -89.96 0.0070
2024-05-13 2024-03-31 13F MARTIN MARIETTA MATLS COM 573284106 64,761 -212,421 -76.64 39,759 -71.25 0.0695
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATLS COM 573284106 277,182 270,802 4,244.55 138,289 5,182.20 0.2597
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATLS COM 573284106 6,380 -333,151 -98.12 2,619 -98.33 0.0053
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATLS COM 573284106 339,531 227,025 201.79 156,758 292.42 0.3447
2023-05-15 2023-03-31 13F MARTIN MARIETTA MATLS COM 573284106 112,506 64,490 134.31 39,946 146.17 0.1001
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS COM 573284106 48,016 -158,719 -76.77 16,228 -75.63 0.0444
2022-11-15 2022-09-30 13F MARTIN MARIETTA MATLS COM 573284106 206,735 153,234 286.41 66,587 315.91 0.2043
2022-08-15 2022-06-30 13F MARTIN MARIETTA MATLS COM 573284106 53,501 53,501 16,010 0.0521
2022-02-14 2021-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -5,408 -100.00 0 -100.00
2021-12-01 2021-09-30 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 5,408 5,408 1,848 0.0077
2021-11-15 2021-09-30 13F MARTIN MARIETTA MATLS COM 573284106 5,408 5,408 1,848 0.0076
2020-11-16 2020-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -125,145 -100.00 0 -100.00
2020-08-14 2020-06-30 13F MARTIN MARIETTA MATLS COM 573284106 125,145 125,145 25,851 0.2243
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -155,185 -100.00 0 -100.00
2019-08-14 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 155,185 -102,514 -39.78 35,710 -31.12 0.2282
2019-05-15 2019-03-31 13F MARTIN MARIETTA MATLS COM 573284106 257,699 257,699 51,844 0.3447
2019-02-14 2018-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -82,829 -100.00 0 -100.00
2018-11-14 2018-09-30 13F MARTIN MARIETTA MATLS COM 573284106 82,829 27,808 50.54 15,071 22.65 0.0684
2018-08-14 2018-06-30 13F MARTIN MARIETTA MATLS COM 573284106 55,021 53,423 3,343.12 12,288 3,612.39 0.0558
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,598 -1,695 -51.47 331 -54.53 0.0014
2018-02-14 2017-12-31 13F Martin Marietta Materials Common Stock 573284106 3,293 3,293 728 0.0023
2017-11-14 2017-09-30 13F Martin Marietta Materials Common Stock 573284106 0 -71,800 -100.00 0 -100.00
2017-08-14 2017-06-30 13F Martin Marietta Materials Common Stock 573284106 71,800 -178,060 -71.26 15,981 -70.69 0.0659
2017-05-15 2017-03-31 13F Martin Marietta Materials Common Stock 573284106 249,860 -59,315 -19.18 54,532 -20.38 0.2543
2017-02-14 2016-12-31 13F Martin Marietta Materials Common Stock 573284106 309,175 183,732 146.47 68,492 184.38 0.3680
2016-08-15 2016-06-30 13F Martin Marietta Materials Common Stock 573284106 125,443 125,443 0.00 24,085 0.1560
2016-02-16 2015-12-31 13F Martin Marietta Materials Common Stock 573284106 0 -6,450 -100.00 0 -100.00
2015-11-16 2015-09-30 13F Martin Marietta Materials Common Stock 573284106 6,450 6,450 0.00 980 0.0072
2015-08-14 2015-06-30 13F Martin Marietta Materials Common Stock 573284106 0 -239,579 -100.00 0 -100.00
2015-05-15 2015-03-31 13F Martin Marietta Materials Common Stock 573284106 239,579 239,579 33,493 0.2706
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.