Generac Holdings Inc. reported fourth-quarter 2025 adjusted earnings per share of $1.61, missing expectations and down from $2.80 last year, while facing a significant 23% decline in residential sales. Despite these setbacks, the company's stock surged around 18% due to an optimistic forecast for mid-teens revenue growth in 2026, driven by a projected 30% increase in commercial and industrial sales. Generac is also expanding its footprint with a new manufacturing facility in Wisconsin and a $500 million share repurchase program, reflecting management's confidence in its shift towards data center infrastructure and smart energy solutions.