Plug Power’s stock chart in 2025 tells a rollercoaster story. After languishing below $1 per share in mid-year, PLUG staged a stunning comeback in late summer and early fall. From August to early October, the stock rocketed from penny-stock levels to around $4.5 – fueled by bullish news and a classic short squeeze. Indeed, Plug’s short interest was near record highs – roughly 30% of its float had been sold shortinvesting.com – so as the stock climbed, forced buying by shorts amplified the rally. In one week the stock jumped 60%, and it notched a ~250% gain over roughly five monthsalphaspread.comalphaspread.com.