HTFL Short Interest (August 31, 2026 Update)
Short interest for HTFL was 6.1M as of August 31, 2026, -10.5% from the prior report.
This page tracks HTFL short interest over time, including historical values, changes between reports, and days to cover.
Heartflow, Inc. Common Stock | HTFL | Nasdaq | Latest report: August 31, 2026
At the latest settlement date of August 31, 2026, Heartflow, Inc. Common Stock (HTFL) showed reported short interest of 6,068,706 shares. That compared with 6,779,888 shares in the prior report, a change of -711.2K shares, or -10.5%. The latest reported days to cover was 2.54, based on average daily volume of 2.4M.
The historical data currently tracked for HTFL includes 25 reported entries from August 15, 2025 to August 31, 2026. Over that span, reported short interest has ranged from 401.4K to 6.8M shares.
Extreme edge-case readings may reflect unusually low reported average volume.
| Settlement Date | Short Interest | Prior Short Interest | Change Shares | Change % | Average Daily Volume | Days to Cover |
|---|---|---|---|---|---|---|
| August 31, 2026 | 6,068,706 | 6,779,888 | -711.2K | -10.5% | 2.4M | 2.54 |
| August 14, 2026 | 6,779,888 | 6,847,694 | -67.8K | -1.0% | 1.8M | 3.85 |
| July 31, 2026 | 6,847,694 | 5,873,437 | 974.3K | +16.6% | 1.0M | 6.61 |
| July 15, 2026 | 5,873,437 | 5,177,499 | 695.9K | +13.4% | 1.4M | 4.15 |
| June 30, 2026 | 5,177,499 | 4,214,484 | 963.0K | +22.9% | 3.0M | 1.74 |
| June 15, 2026 | 4,214,484 | 3,635,764 | 578.7K | +15.9% | 1.1M | 3.67 |
| May 29, 2026 | 3,635,764 | 3,478,053 | 157.7K | +4.5% | 1.3M | 2.9 |
| May 15, 2026 | 3,478,053 | 4,358,950 | -880.9K | -20.2% | 1.1M | 3.31 |
| April 30, 2026 | 4,358,950 | 5,546,436 | -1.2M | -21.4% | 1.1M | 3.88 |
| April 15, 2026 | 5,546,436 | 6,011,764 | -465.3K | -7.7% | 1.2M | 4.6 |
| March 31, 2026 | 6,011,764 | 5,561,027 | 450.7K | +8.1% | 2.0M | 3.05 |
| March 13, 2026 | 5,561,027 | 5,453,610 | 107.4K | +2.0% | 1.1M | 5.15 |
| February 27, 2026 | 5,453,610 | 4,560,254 | 893.4K | +19.6% | 1.2M | 4.39 |
| February 13, 2026 | 4,560,254 | 4,951,283 | -391.0K | -7.9% | 2.8M | 1.65 |
| January 30, 2026 | 4,951,283 | 3,476,809 | 1.5M | +42.4% | 843.0K | 5.87 |
| January 15, 2026 | 3,476,809 | 3,162,641 | 314.2K | +9.9% | 830.4K | 4.19 |
| December 31, 2025 | 3,162,641 | 1,448,787 | 1.7M | +118.3% | 1.0M | 3.06 |
| December 15, 2025 | 1,448,787 | 1,219,620 | 229.2K | +18.8% | 503.1K | 2.88 |
| November 28, 2025 | 1,219,620 | 1,102,016 | 117.6K | +10.7% | 694.8K | 1.76 |
| November 14, 2025 | 1,102,016 | 484,255 | 617.8K | +127.6% | 499.6K | 2.21 |
| October 31, 2025 | 484,255 | 401,399 | 82.9K | +20.6% | 242.0K | 2 |
| October 15, 2025 | 401,399 | 766,554 | -365.2K | -47.6% | 385.3K | 1.04 |
| September 15, 2025 | 595,908 | 545,224 | 50.7K | +9.3% | 322.8K | 1.85 |
| August 29, 2025 | 545,224 | 463,100 | 82.1K | +17.7% | 360.2K | 1.51 |
| August 15, 2025 | 463,100 | 0 | 463.1K | +100.0% | 1.1M | 1 |