About Pulmonx Corporation (LUNG) data
Data as of September 30, 2026.
Pulmonx Corporation (LUNG) has 802.73K shares sold short as of the latest FINRA settlement report on September 30, 2026. Short interest has decreased by 5.32% compared with the prior settlement. At the current average daily volume, covering all open short positions would take about 3.20 days (days to cover).
Frequently asked questions
What is the current short interest in LUNG?
As of the latest FINRA settlement dated September 30, 2026, LUNG had approximately 802,733 shares sold short. Short interest data is reported by FINRA twice per month.
How much does it cost to short LUNG?
The latest borrow fee (cost to borrow) for LUNG is 0.26% 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 LUNG?
Days to cover for LUNG is approximately 3.20 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 LUNG shares failed to deliver?
On September 30, 2026, the latest settlement date in the SEC's fails-to-deliver data, 56,297 shares of LUNG had failed to deliver, worth about $111.47K at the prior day's close (0.13% 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 LUNG a short squeeze candidate?
A squeeze needs shorts that are hard to close. LUNG trades about 251,008 shares a day and would take roughly 3.20 days to unwind current short positions, at a current borrow fee of 0.26%. Higher days-to-cover and a rising borrow fee together are the setup to watch; neither alone is enough.