FuelCell Energy stock skyrocketed nearly 70% in June. Shares now trade near $36.25, powered by a decisive pivot toward the AI data center power market. The move made FCEL one of the best-performing US stocks of the month.

The rally reshaped how Wall Street values fuel-cell companies serving the booming buildout of AI infrastructure.

Why FCEL Stock Jumped 70% in June on the AI Data Center Push

FuelCell Energy (FCEL) is a Nasdaq-listed clean energy company that develops high-temperature fuel cell systems for stationary power generation.

The stock has emerged as a top play on the AI data center power crunch. Furthermore, shares now trade at $36.25 after the historic June rally.

The one-month move was remarkable in scale. FCEL delivered a 70% gain across June, according to TradingView data. Moreover, the past 5 trading days alone added another 79%, showing how much of the rally concentrated into the final week of the month.

The broader picture is even more striking. FCEL is now up 383% year-to-date in 2026. Furthermore, the stock has surged 552% across the past 12 months. Consequently, the June performance capped the company’s best quarter in more than 5 years of trading.

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Trading volume also confirmed the shift in sentiment. Retail attention exploded, with Stocktwits message volume up 1,056% in 24 hours during the peak of the rally.

Moreover, the stock was included in the Russell 3000 index as of June 26, unlocking passive index-tracking flows.

What the AI Data Center Power Pivot Really Delivered

The AI data center pivot is the strategic shift where FCEL now targets hyperscaler power demand as its main growth engine. Over 80% of its commercial pipeline is now tied to data centers. Furthermore, the total pipeline has grown by 275% year-over-year across recent quarters.

The centerpiece deal is the Fit Energy agreement announced in June. FCEL will supply up to 380 MW of clean baseload on-site power for AI data centers. Moreover, the deal includes a deposit-backed initial order for 30 MW, with delivery slated to begin in late 2026.

Additional catalysts stacked up throughout June. The Export-Import Bank of the United States (EXIM) approved a $49 million financing package to support FCEL’s South Korea expansion. Moreover, management outlined plans to increase Torrington’s manufacturing capacity to 500 megawatts annually, with an investment of $200 to $275 million.

“$FCEL just received what I believe is the most important piece of news in the company’s history, and the stock sold off. I added. I believe this can be a 2x+ from here by EOY ($50+) The risks are obvious: • Ramp execution • Management’s ability to reach its long-term product gross margin targets (>20%) But once those questions are answered, the demand side of the story becomes very hard to ignore,” one analyst said on X.

The company reported its fiscal first quarter 2026 results in March 2026, delivering strong year-over-year revenue growth. Revenue reached $30.5 million, a 61% increase from $19.0 million in the same period last year, driven by progress on its power generation projects and its advancing data center power strategy.

Despite the top-line improvement, the company continued to face operating challenges, posting a gross loss of $5.9 million, an operating loss of $26.3 million, and a net loss per share of $0.49.

The backlog stood at $1.17 billion, slightly down from the prior year, as the company focuses on commercial momentum in carbon capture and high-efficiency fuel cell solutions to meet the growing demand for clean energy and data centers.

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Source: BeInCrypto