MARTIN MARIETTA MATERIALS · CUSIP 573284106 · CIK 860643
As of 2026-06-30, GARDNER RUSSO & QUINN LLC reported 705.37K MLM (shares), valued at $406.78M, or 4.56% of its reported non-derivative portfolio. Filed 2026-08-13.
Verify history & sources →Shares decreased 1.40%; reported value decreased 3.41%, and weight changed -0.40 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.
Left: % · Right: Shares · Independently scaled axes
Exact data and methodology
Axes scale independently; a crossing does not mean equal values. Weight uses each quarter's total reported non-derivative value. Same CUSIP; missing quarters are gaps, not zero. Revised history may include later disclosures.
| Quarter | Weight | Quantity | Source |
|---|---|---|---|
| Q2 2026 | 4.56% | 705,367 | SEC filing ↗Filed Aug 13, 2026 |
| Q1 2026 | 4.96% | 715,411 | SEC filing ↗Filed May 13, 2026 |
| Q4 2025 | 4.88% | 726,612 | SEC filing ↗Filed Feb 12, 2026 |
| Q3 2025 | 4.65% | 687,537 | SEC filing ↗Filed Nov 12, 2025 |
| Q2 2025 | 4.16% | 712,779 | SEC filing ↗Filed Aug 13, 2025 |
| Q1 2025 | 3.83% | 714,252 | SEC filing ↗Filed May 13, 2025 |
| Q4 2024 | 4.13% | 707,010 | SEC filing ↗Filed Feb 12, 2025 |
| Q3 2024 | 4.14% | 750,072 | SEC filing ↗Filed Nov 13, 2024 |
| Q2 2024 | 4.37% | 764,059 | SEC filing ↗Filed Aug 13, 2024 |
| Q1 2024 | 4.96% | 787,480 | SEC filing ↗Filed May 14, 2024 |
| Q4 2023 | 4.78% | 940,568 | SEC filing ↗Filed Feb 13, 2024 |
| Q3 2023 | 4.29% | 958,763 | SEC filing ↗Filed Nov 14, 2023 |
History & evidence by quarter
| Quarter | Weight | Quantity | Value | Change explained | Source |
|---|---|---|---|---|---|
| Q3 2023 | 4.29% | 958,763 | $393.55M | The prior quarter is outside the free window. Sign in for the comparison. | SEC filing ↗ Filed Nov 14, 2023 |
| Q4 2023 | 4.78% | 940,568 | $469.26M | Shares decreased 1.90%; reported value increased 19.24%, and weight changed +0.49 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 13, 2024 |
| Q1 2024 | 4.96% | 787,480 | $483.47M | Shares decreased 16.28%; reported value increased 3.03%, and weight changed +0.18 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 14, 2024 |
| Q2 2024 | 4.37% | 764,059 | $413.97M | Shares decreased 2.97%; reported value decreased 14.38%, and weight changed -0.59 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 13, 2024 |
| Q3 2024 | 4.14% | 750,072 | $403.73M | Shares decreased 1.83%; reported value decreased 2.47%, and weight changed -0.23 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 13, 2024 |
| Q4 2024 | 4.13% | 707,010 | $365.17M | Shares decreased 5.74%; reported value decreased 9.55%, and weight changed -0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 12, 2025 |
| Q1 2025 | 3.83% | 714,252 | $341.51M | Shares increased 1.02%; reported value decreased 6.48%, and weight changed -0.30 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 13, 2025 |
| Q2 2025 | 4.16% | 712,779 | $391.29M | Shares decreased 0.21%; reported value increased 14.58%, and weight changed +0.33 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 13, 2025 |
| Q3 2025 | 4.65% | 687,537 | $433.34M | Shares decreased 3.54%; reported value increased 10.75%, and weight changed +0.49 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 12, 2025 |
| Q4 2025 | 4.88% | 726,612 | $452.43M | Shares increased 5.68%; reported value increased 4.41%, and weight changed +0.23 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 12, 2026 |
| Q1 2026 | 4.96% | 715,411 | $421.15M | Shares decreased 1.54%; reported value decreased 6.91%, and weight changed +0.08 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 13, 2026 |
| Q2 2026 | 4.56% | 705,367 | $406.78M | Shares decreased 1.40%; reported value decreased 3.41%, and weight changed -0.40 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 13, 2026 |
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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.