About Sutro Biopharma, Inc. (STRO) data
Data as of September 30, 2026.
Sutro Biopharma, Inc. (STRO) has 1.85M shares sold short as of the latest FINRA settlement report on September 30, 2026. Short interest has decreased by 11.02% compared with the prior settlement. At the current average daily volume, covering all open short positions would take about 6.48 days (days to cover).
Frequently asked questions
What is the current short interest in STRO?
As of the latest FINRA settlement dated September 30, 2026, STRO had approximately 1,847,453 shares sold short. Short interest data is reported by FINRA twice per month.
How much does it cost to short STRO?
The latest borrow fee (cost to borrow) for STRO is 0.52% 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 STRO?
Days to cover for STRO is approximately 6.48 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 STRO shares failed to deliver?
On September 30, 2026, the latest settlement date in the SEC's fails-to-deliver data, 8 shares of STRO had failed to deliver, worth about $128.80 at the prior day's close. 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 STRO a short squeeze candidate?
A squeeze needs shorts that are hard to close. STRO trades about 285,322 shares a day and would take roughly 6.48 days to unwind current short positions, at a current borrow fee of 0.52%. Higher days-to-cover and a rising borrow fee together are the setup to watch; neither alone is enough.