Plug Power rallies 37.6% on margin recovery, revenue beats

Plug Power shares jumped 37.6% in the first half of 2026, reversing a difficult 2025 that ended with a 7.5% annual loss. However, the rally has stalled abruptly in July, with the stock shedding 19% since the end of June without any clear negative catalyst from the company. The recent drop mirrors the volatility of 2025, when an early 37.6% gain through the first nine months evaporated in the final quarter.

The first-half gains were primarily driven by the company's March report on fourth-quarter 2025 earnings, which showed tangible progress from its cost-savings program, Project Quantum Leap. Gross margins swung dramatically to 2.4% in the period, recovering from a deeply negative 123% in the fourth quarter of 2024.

Losses at the bottom line also narrowed significantly, with earnings per share improving to negative $0.63 from negative $1.48 a year earlier. The results prompted a wave of price target increases from Wall Street analysts. Wells Fargo raised its target to $2 from $1.50, while Susquehanna lifted its view to $2.75 from $2.50 and Clear Street bumped its target to $3.50 from $3.

Momentum continued into May when Plug reported first-quarter 2026 results, posting revenue of $163.5 million to easily beat consensus estimates of $141.2 million. The 22% year-over-year revenue increase was accompanied by forward guidance from CEO Jose Luis Crespo, who reaffirmed the expectation of achieving positive EBITDAS in the fourth quarter of 2026.

EBITDAS, which excludes share-based expenses alongside standard depreciation and amortization, is a key benchmark for the company's operational turnaround. For market professionals, the stock's trajectory illustrates the high beta nature of unprofitable clean-energy companies. While the fundamental metrics of margin expansion and revenue growth are moving in the right direction, the sudden July sell-off underscores that investor confidence remains fragile until consistent profitability is actually delivered.