Generac Surges Up to 34% After Securing Up to $8 Billion Amazon Data Center Generator Deal

Generac Holdings shares surged as much as 34% in extended and premarket trading on September 17, 2026, after the company announced a long-term supply agreement with Amazon to provide backup generators for Amazon's expanding data center network. Initial deliveries are valued at $2.4 billion and are scheduled across 2027 and 2028, while total payments tied to the broader relationship, including warrants, could reach $8 billion.

The deal cements Generac's standing as a key power infrastructure supplier to hyperscale cloud operators, with Amazon representing what analysts characterized as a second major hyperscaler customer for the company. Canaccord raised its price target on GNRC to $375 following the announcement, with analysts citing meaningful earnings upside from the agreement.

By midday regular trading the stock had given back some of its premarket gains, last seen up roughly 19% to 27% depending on the session, but still ranked as the top performer in the S&P 500 on the day. GNRC entered the session already up 59.4% year to date, and the Amazon contract pushed shares through a prior resistance zone in the $180 to $200 range. One source noted the agreement contains provisions giving Amazon rights beyond equipment supply, though the full contractual details were not disclosed publicly.