Institutional Ownership
Ionis Pharmaceuticals Inc
CUSIP 462222100COMIONSQ1 2026
Shares Short
20.04M
As of Jul 15, 2026
Days to Cover
3.68
Short shares ÷ avg daily volume
Change vs Prior
+15.0%
vs previous settlement
Avg Daily Volume
5.45M
FINRA reported ADV
Short Interest History
17 settlements on record · FINRA consolidated
Higher short interest is bearish: increases show red, decreases green.
| Settlement | Shares Short | Prior | Change | Avg Daily Vol | Days to Cover |
|---|---|---|---|---|---|
| Jul 15, 2026 | 20.04M | 17.43M | +15.0% | 5.45M | 3.68 |
| Jun 30, 2026 | 17.43M | 17.76M | -1.9% | 2.38M | 7.33 |
| Jun 15, 2026 | 17.76M | 16.99M | +4.5% | 1.67M | 10.64 |
| May 29, 2026 | 16.99M | 16.09M | +5.6% | 1.70M | 9.98 |
| May 15, 2026 | 16.09M | 16.28M | -1.2% | 1.61M | 10.00 |
| Apr 30, 2026 | 16.28M | 13.76M | +18.3% | 2.02M | 8.04 |
| Apr 15, 2026 | 13.76M | 14.33M | -4.0% | 1.44M | 9.54 |
| Mar 31, 2026 | 14.33M | 13.95M | +2.7% | 2.42M | 5.93 |
| Mar 13, 2026 | 13.95M | 15.32M | -9.0% | 2.45M | 5.68 |
| Feb 27, 2026 | 15.32M | 15.49M | -1.1% | 2.22M | 6.91 |
| Feb 13, 2026 | 15.49M | 15.54M | -0.3% | 1.85M | 8.37 |
| Jan 30, 2026 | 15.54M | 13.73M | +13.2% | 2.67M | 5.82 |