About aTyr Pharma, Inc. (ATYR) data
Data as of September 30, 2026.
aTyr Pharma, Inc. (ATYR) has 12.89M shares sold short as of the latest FINRA settlement report on September 30, 2026. Short interest has increased by 20.86% compared with the prior settlement. At the current average daily volume, covering all open short positions would take about 0.96 days (days to cover).
Frequently asked questions
What is the current short interest in ATYR?
As of the latest FINRA settlement dated September 30, 2026, ATYR had approximately 12,893,008 shares sold short. Short interest data is reported by FINRA twice per month.
How much does it cost to short ATYR?
The latest borrow fee (cost to borrow) for ATYR is 1.02% 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 ATYR?
Days to cover for ATYR is approximately 0.96 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.
How many ATYR shares failed to deliver?
On September 30, 2026, the latest settlement date in the SEC's fails-to-deliver data, 4,097 shares of ATYR had failed to deliver, worth about $1.27K at the prior day's close (under 0.01% of shares outstanding). That is the balance still outstanding that day, not new fails. Fails come from long sales and delivery delays as well as short sales.
Is ATYR a short squeeze candidate?
A squeeze needs shorts that are hard to close. ATYR trades about 13,422,383 shares a day and would take roughly 0.96 days to unwind current short positions, at a current borrow fee of 1.02%. Higher days-to-cover and a rising borrow fee together are the setup to watch; neither alone is enough.