Generac Holdings Inc.

Generac Holdings Inc. is an American energy technology company that designs, manufactures, and distributes power generation equipment, energy storage systems, and energy management devices, generating $4.21 billion in revenue in fiscal 2025. The company is the dominant player in the North American residential standby generator market, a growing competitor in commercial and industrial (C&I) power generation, and an emerging participant in the large-megawatt diesel generator market serving the data center build-out. Its products range from portable generators sold at Home Depot to multi-megawatt diesel gensets destined for hyperscale data centers, and its ecobee subsidiary places a smart thermostat in more than five million North American homes.

This is a story about an incumbent franchise — the home standby generator business, where Generac created the category and still owns more than 70% of it — funding an enormous adjacent growth bet in data center backup power, while simultaneously managing a cyclical residential demand environment and the still-unprofitable energy technology investments that management insists will be the company's third act. The file turns on a single question: whether the data center opportunity can grow fast enough and profitably enough to transform Generac's earnings power before the residential cycle turns down again.

The stock closed at approximately $268 in early June 2026, giving the company an enterprise value of roughly $16.7 billion — about 23 times trailing adjusted EBITDA and over 100 times trailing GAAP net income, which was depressed by one-time charges in 2025. That multiple embeds expectations that the data center business will deliver. The analysis that follows is an effort to understand what exactly those expectations are, and whether the underlying business can meet them.