Heartflow, Inc. Common Stock | HTFL | Nasdaq | Latest report: February 27, 2026
At the latest settlement date of February 27, 2026, Heartflow, Inc. Common Stock (HTFL) showed reported short interest of 5,453,610 shares. That compared with 4,560,254 shares in the prior report, a change of 893.4K shares, or +19.6%. The latest reported days to cover was 4.39, based on average daily volume of 1.2M.
The historical data currently tracked for HTFL includes 13 reported entries from August 15, 2025 to February 27, 2026. During that span, reported short interest ranged between 401.4K and 5.5M 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 |
|---|---|---|---|---|---|---|
| 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 |