Martin Marietta Materials Inc. short interest
Short interest in Martin Marietta Materials Inc. was 2.7 million shares at the 31 August 2026 settlement, up 19.6% on the previous settlement, with 4.36 days to cover at an average daily volume of 620,292 shares, as reported to FINRA.
| Settlement | Shares short | Change | Average daily volume | Days to cover |
|---|---|---|---|---|
| 31 August 2026 | 2,706,782 | +19.6% | 620,292 | 4.36 |
| 14 August 2026 | 2,262,403 | -5.0% | 480,099 | 4.71 |
| 31 July 2026 | 2,380,633 | -2.7% | 648,627 | 3.67 |
| 15 July 2026 | 2,445,770 | +9.7% | 578,999 | 4.22 |
| 30 June 2026 | 2,229,187 | +3.2% | 738,451 | 3.02 |
| 15 June 2026 | 2,160,946 | -2.5% | 505,934 | 4.27 |
| 29 May 2026 | 2,215,305 | +33.1% | 659,308 | 3.36 |
| 15 May 2026 | 1,664,180 | +15.6% | 479,079 | 3.47 |
| 30 April 2026 | 1,439,413 | -14.2% | 520,637 | 2.76 |
| 15 April 2026 | 1,677,013 | -11.3% | 337,926 | 4.96 |
| 31 March 2026 | 1,890,998 | +9.7% | 561,695 | 3.37 |
| 13 March 2026 | 1,723,193 | -3.6% | 655,001 | 2.63 |
FINRA publishes consolidated short interest twice a month, about ten days after each settlement. Days to cover is shares short over average daily volume. Short interest as a share of the float is not shown: the float is not in the public record.
Source
FINRA equity short interest data, the public dataset.
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