AI Surge in Data Centers Causes Generator Stocks to Soar... 4 Trillion Won Added in a Day

Generac Holdings (NASDAQ: GNRC) jumped 16.25% on the New York Stock Exchange to close at $252.40. Trading volume topped 1.26 million shares, and the company’s market capitalization swelled by about $2.9 billion to roughly $14.8 billion.

The stock hit a fresh 52-week high, gaining more than 90% over the past year and over 50% so far in 2026.

In its first-quarter 2026 results, Generac reported revenue of $1.06 billion, up 12% year-over-year, and adjusted earnings per share of $1.80—well above analysts’ estimates. The company also raised its full-year 2026 guidance, projecting mid-to-high double-digit revenue growth and adjusted EBITDA margins.

Investor enthusiasm was further fueled by a more than $700 million backlog of large generators for data centers, reflecting strong AI-driven demand in the commercial and industrial segments.

Founded in 1959 and headquartered in Waukesha, Wisconsin, Generac is a leading provider of backup power solutions and energy technologies for residential, commercial and industrial markets. Its core offerings include home standby generators that automatically engage during outages, large-scale industrial generators, and power control systems. Recently, the company has expanded its battery storage and data-center backup power solutions, positioning itself to benefit from growing AI infrastructure investments.