Fluence Energy, Inc. (NASDAQ:FLNC) saw its stock price soar 21.09% in after-hours trading on Wednesday.

The surge followed the release of the company's second quarter 2026 financial results. Fluence Energy reported a quarterly loss per share of $(0.16), which was in line with analyst consensus estimates. While quarterly sales of $464.891 million missed analyst expectations, they represented a 7.71% increase over the same period last year.

Investor sentiment was bolstered by management's reaffirmation of its fiscal year 2026 guidance, including revenue guidance of approximately $3.2 billion to $3.6 billion and adjusted EBITDA guidance of about $40 million to $60 million, signaling confidence in the company's full-year performance outlook.