Ticker Short Interest
IONS Short Interest Intelligence
Ionis Pharmaceuticals Inc positioning pressure, squeeze risk, bearish conviction, crowding, days to cover, and price-positioning divergence.
Crowded Short
Covering Rally
IONS is classified as Crowded Short. Latest reported short interest is 17.4M shares; short interest changed -1.9%, price moved +10.8% since the previous report, short interest is in the 86th percentile, and days to cover is in the 29th percentile. Trend context is constructive.
Reported Short Interest
2026-03-31 to 2026-06-30Days To Cover
liquidity pressureShort Interest Change
report-to-reportPrice Context
2026-03-20 to 2026-06-26Squeeze Radar
59Elevated short interest becomes most interesting when price strength forces shorts to defend or cover.
Bearish Conviction
25Rising short interest alongside weak trend can mean the bearish trade is being reinforced, not trapped.
Crowding
60Latest short interest is 17.4M shares and days to cover is 7.33.
Divergence
0Short interest fell while price rose. The bearish trade appears to be unwinding into strength.
Report History
IONS Short Interest Ledger
| Settlement | Short interest | Previous | Change | Days cover | Average volume |
|---|---|---|---|---|---|
| 30 Jun 2026 | 17425020 | 17757362 | -1.9% | 7.33 | 2377735 |
| 15 Jun 2026 | 17757362 | 16986466 | 4.5% | 10.64 | 1668579 |
| 29 May 2026 | 16986466 | 16086234 | 5.6% | 9.98 | 1702170 |
| 15 May 2026 | 16086234 | 16279706 | -1.2% | 10.00 | 1608774 |
| 30 Apr 2026 | 16279706 | 13762159 | 18.3% | 8.04 | 2023751 |
| 15 Apr 2026 | 13762159 | 14330826 | -4.0% | 9.54 | 1443237 |
| 31 Mar 2026 | 14330826 | 13949702 | 2.7% | 5.93 | 2418365 |
Short interest is delayed, reported on a periodic schedule, and may be revised. The dashboard is research context only and does not prove real-time short activity.