As of the most recent data available, the short interest for Plug Power Inc. (PLUG) stands at 343,021,901 shares, representing approximately 26.20% of the float. The short interest ratio, or days to cover, is 4.30 days based on average daily volume. 
Additional metrics include:
• Off-exchange short volume ratio: 42.68% (as of January 2, 2026).
• Short borrow fee rate: 0.52% annualized (as of January 5, 2026).
• Shares available to short: Around 6.5 million to 9.4 million (intraday fluctuations as of January 5, 2026).