Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionJump Financial, LLC
Latest Disclosed Ownership1,012 shares
Latest Disclosed Value $ 595,744
Jump Financial, LLC reports 61.34% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 14, 2026 - Jump Financial, LLC filed a 13F-HR form disclosing ownership of 1,012 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $595,744 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,618 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -61.34% 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 Materials Common Stock 573284106 1,012 -1,606 -61.34 596 -63.50 0.0071
2026-02-17 2025-12-31 13F Martin Marietta Materials Common Stock 573284106 2,618 1,448 123.76 1,630 121.17 0.0200
2025-11-13 2025-09-30 13F Martin Marietta Materials Common Stock 573284106 1,170 -1,456 -55.45 737 -48.85 0.0088
2025-08-13 2025-06-30 13F Martin Marietta Materials Common Stock 573284106 2,626 2,626 1,442 0.0159
2025-05-14 2025-03-31 13F Martin Marietta Materials Common Stock 573284106 0 -1,688 -100.00 0 -100.00
2025-02-13 2024-12-31 13F Martin Marietta Materials Common Stock 573284106 1,688 178 11.79 872 7.27 0.0182
2024-11-14 2024-09-30 13F Martin Marietta Materials Common Stock 573284106 1,510 748 98.16 813 97.09 0.0166
2024-11-14 2024-06-30 13F/A-1 Martin Marietta Materials Common Stock 573284106 762 -1,835 -70.66 413 -74.15 0.0082
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATLS Common Stock 573284106 762 -1,835 413 0.0082
2024-05-13 2024-03-31 13F MARTIN MARIETTA MATLS Common Stock 573284106 2,597 -6,759 -72.24 1,594 -65.85 0.0436
2024-10-21 2023-12-31 13F/A-1 Martin Marietta Materials Common Stock 573284106 9,356 3,118 49.98 4,668 82.30 0.1536
2024-02-07 2023-12-31 13F MARTIN MARIETTA MATLS Common Stock 573284106 9,356 3,118 4,668 0.1543
2024-10-21 2023-09-30 13F/A-1 Martin Marietta Materials Common Stock 573284106 6,238 5,530 781.07 2,561 685.28 0.0967
2023-11-07 2023-09-30 13F MARTIN MARIETTA MATLS Common Stock 573284106 6,238 5,530 2,561 0.0979
2024-10-21 2023-06-30 13F/A-1 MARTIN MARIETTA MATERIALS Common Stock 573284106 708 708 327 0.0123
2023-08-07 2023-06-30 13F MARTIN MARIETTA MATLS Common Stock 573284106 708 708 327 0.0123
2023-05-03 2023-03-31 13F MARTIN MARIETTA MATLS Common Stock 573284106 0 -1,026 -100.00 0 -100.00
2023-02-14 2022-12-31 13F MARTIN MARIETTA MATLS Common Stock 573284106 1,026 1,026 347 0.0184
2022-11-07 2022-09-30 13F MARTIN MARIETTA MATLS Common Stock 573284106 0 -1,475 -100.00 0 -100.00
2022-08-09 2022-06-30 13F MARTIN MARIETTA MATLS Common Stock 573284106 1,475 1,475 442 0.0191
2021-11-12 2021-09-30 13F MARTIN MARIETTA MATLS Common Stock 573284106 0 -982 -100.00 0 -100.00
2021-08-13 2021-06-30 13F MARTIN MARIETTA MATLS Common Stock 573284106 982 102 11.59 345 16.55 0.0333
2021-05-17 2021-03-31 13F MARTIN MARIETTA MATLS Common Stock 573284106 880 880 296 0.0276
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.