Plug Power's Operational Gains Battle a 27% Short Interest as Cash Concerns Persist

Hydrogen specialist Plug Power posts 22% revenue growth and improved margins, but short interest surges to 27.4% as cash burn and analyst skepticism weigh on shares near $2.38.

The chasm between Plug Power's operational momentum and its stock price has rarely been wider. The hydrogen specialist’s shares have slumped nearly 44% from their June high, landing at roughly $2.38 (€2.09), even as the company posts its best quarterly revenue growth in years. Behind the sell-off lies a record wave of bearish bets: short interest has swelled to 27.4%, signalling that many traders see further downside despite the improving fundamentals.

Plug Power’s first-quarter results for 2026 tell an encouraging operational story. Revenue climbed 22% year-on-year to $163.5 million, driven by a surge in electrolyser sales that ballooned from $9.2 million to $40.8 million. The gross margin, while still negative at –13%, marks a dramatic improvement from the –55% posted a year earlier. The company also landed a 50-megawatt order for the Hunter Valley Hydrogen Hub in Australia — the largest project of its kind to reach a final investment decision in the country. Management is targeting positive adjusted EBITDA by the fourth quarter of 2026.

Wall Street, however, remains deeply sceptical. Morgan Stanley reiterated its "Underweight" rating on Thursday while nudging its price target up to $1.65 from $1.50. The broader analyst consensus sits at $3.56, suggesting the stock is undervalued relative to that average. Yet the technical picture reinforces the bearish view: Plug Power trades roughly 8% below its 200-day moving average of $2.26, and the relative strength index has dropped to 31.4, a level normally associated with oversold conditions but one that in a high-volatility name can also precede further declines.

The central worry for investors is cash. Plug Power ended the first quarter with $802 million on hand, but the company continues to burn through capital as it scales production. A potential $1.66 billion loan from the U.S. Department of Energy remains a crucial safety net for domestic expansion, while management expects $275 million in cash inflows from data-centre-related asset monetisations during June and July. Analysts caution, however, that any capital raise conducted on unfavourable terms could trigger another leg down for the stock.

The next major test comes with the quarterly earnings report, tentatively scheduled for 10 August. A weak print would likely send shares probing the recent low of $1.21 (€1.21). Conversely, a solid update that confirms the margin trajectory and order momentum could force the army of short sellers to cover their positions, setting the stage for a squeeze. The setup is volatile, and the outcome hinges on whether Plug Power can convince the market that its turnaround is sustainable.

For context, the broader hydrogen sector has been under pressure from elevated interest rates, which delay capital-intensive projects. Plug Power’s chief Nordic rival, Nel ASA, is grappling with its own leadership vacuum after the abrupt departure of its CEO and a 73% plunge in order intake. While Nel carries no debt and a cleaner balance sheet, it lacks the operational spark Plug Power is currently showing — a divergence that underscores the high-risk, high-reward nature of the U.S. company’s turnaround bet.