About Ionis Pharmaceuticals, Inc. (IONS) data
Data as of September 30, 2026.
Ionis Pharmaceuticals, Inc. (IONS) has 22.51M shares sold short as of the latest FINRA settlement report on September 30, 2026. Short interest has increased by 7.75% compared with the prior settlement. At the current average daily volume, covering all open short positions would take about 4.61 days (days to cover).
Frequently asked questions
What is the current short interest in IONS?
As of the latest FINRA settlement dated September 30, 2026, IONS had approximately 22,508,744 shares sold short. Short interest data is reported by FINRA twice per month.
How much does it cost to short IONS?
The latest borrow fee (cost to borrow) for IONS is 0.28% per year, based on IBKR data. Fees can change throughout the trading day as shares are borrowed and returned.
What is the days to cover ratio for IONS?
Days to cover for IONS is approximately 4.61 days. This estimates how many trading days it would take short sellers to buy back all outstanding short shares at the current average daily volume.
Is IONS a short squeeze candidate?
A squeeze needs shorts that are hard to close. IONS trades about 4,881,042 shares a day and would take roughly 4.61 days to unwind current short positions, at a current borrow fee of 0.28%. Higher days-to-cover and a rising borrow fee together are the setup to watch; neither alone is enough.