SION Short Interest (April 15, 2026 Update)
Short interest for SION was 3.8M as of April 15, 2026, +1.1% from the prior report.
This page tracks SION short interest over time, including historical values, changes between reports, and days to cover.
Sionna Therapeutics, Inc. Comm | SION | R | Latest report: April 15, 2026
At the latest settlement date of April 15, 2026, Sionna Therapeutics, Inc. Comm (SION) showed reported short interest of 3,799,971 shares. That compared with 3,756,705 shares in the prior report, a change of 43.3K shares, or +1.1%. The latest reported days to cover was 8.51, based on average daily volume of 446.3K.
The historical data currently tracked for SION includes 27 reported entries from February 14, 2025 to April 15, 2026. The table below shows each reported settlement date currently included for this symbol.
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 |
|---|---|---|---|---|---|---|
| April 15, 2026 | 3,799,971 | 3,756,705 | 43.3K | +1.1% | 446.3K | 8.51 |
| March 31, 2026 | 3,756,705 | 3,544,166 | 212.5K | +6.0% | 332.8K | 11.29 |
| March 13, 2026 | 3,544,166 | 3,350,255 | 193.9K | +5.8% | 287.3K | 12.34 |
| February 27, 2026 | 3,350,255 | 3,064,857 | 285.4K | +9.3% | 143.4K | 23.36 |
| February 13, 2026 | 3,064,857 | 3,143,560 | -78.7K | -2.5% | 407.2K | 7.53 |
| January 30, 2026 | 3,143,560 | 3,053,667 | 89.9K | +2.9% | 231.9K | 13.55 |
| January 15, 2026 | 3,053,667 | 3,258,091 | -204.4K | -6.3% | 312.3K | 9.78 |
| December 31, 2025 | 3,258,091 | 2,876,610 | 381.5K | +13.3% | 384.5K | 8.47 |
| December 15, 2025 | 2,876,610 | 2,862,557 | 14.1K | +0.5% | 289.4K | 9.94 |
| November 28, 2025 | 2,862,557 | 2,973,430 | -110.9K | -3.7% | 266.3K | 10.75 |
| November 14, 2025 | 2,973,430 | 2,965,776 | 7.7K | +0.3% | 194.7K | 15.27 |
| October 31, 2025 | 2,965,776 | 3,372,058 | -406.3K | -12.0% | 364.6K | 8.13 |
| October 15, 2025 | 3,372,058 | 3,931,123 | -559.1K | -14.2% | 299.6K | 11.25 |
| September 15, 2025 | 3,771,820 | 3,475,743 | 296.1K | +8.5% | 306.3K | 12.31 |
| August 29, 2025 | 3,475,743 | 3,600,368 | -124.6K | -3.5% | 197.6K | 17.59 |
| August 15, 2025 | 3,600,368 | 3,679,050 | -78.7K | -2.1% | 174.7K | 20.61 |
| July 31, 2025 | 3,679,050 | 3,530,059 | 149.0K | +4.2% | 144.9K | 25.39 |
| July 15, 2025 | 3,530,059 | 3,631,953 | -101.9K | -2.8% | 159.5K | 22.13 |
| June 30, 2025 | 3,631,953 | 2,827,394 | 804.6K | +28.5% | 355.4K | 10.22 |
| June 13, 2025 | 2,827,394 | 2,871,885 | -44.5K | -1.5% | 138.6K | 20.41 |
| May 30, 2025 | 2,871,885 | 2,587,312 | 284.6K | +11.0% | 117.8K | 24.39 |
| May 15, 2025 | 2,587,312 | 2,502,341 | 85.0K | +3.4% | 173.9K | 14.88 |
| April 30, 2025 | 2,502,341 | 2,291,588 | 210.8K | +9.2% | 108.1K | 23.14 |
| April 15, 2025 | 2,291,588 | 2,280,720 | 10.9K | +0.5% | 180.5K | 12.69 |
| March 31, 2025 | 2,280,720 | 1,739,754 | 541.0K | +31.1% | 272.2K | 8.38 |
| February 28, 2025 | 1,329,000 | 630,656 | 698.3K | +110.7% | 199.9K | 6.65 |
| February 14, 2025 | 630,656 | 0 | 630.7K | +100.0% | 301.4K | 2.09 |