ERock, the Houston-based maker of natural gas generators, said late on Tuesday that it raised $600 million in its U.S. initial public offering. The company sold approximately 27.9 million shares at $21.50 each, which was the midpoint of its previously indicated price range of $20 to $23.
The offering comes as U.S. equity markets have seen a renewed wave of initial listings. ERock joins a list of companies entering public markets amid recently revived investor interest in new stocks. Notable market activity referenced around the same period includes SpaceX moving toward a public debut this week and AI-focused companies Anthropic and OpenAI having filed confidentially to go public in New York.
Founded in 2006 and formerly known as Enchanted Rock, ERock supplies natural gas generator systems to a range of customers, including data centers, utilities and commercial and industrial clients across nine U.S. states. The company reported that a substantial portion of its revenue is concentrated in high-growth regions such as Texas and California.
On capacity, ERock is targeting an increase in its annual assembly capability to roughly 1.2 gigawatts by the end of 2026. The company plans to achieve that expansion through the development of its Hyperion facility in Houston.
Morgan Stanley and J.P. Morgan served as joint lead bookrunning managers for the offering. ERock is scheduled to begin trading on the New York Stock Exchange under the ticker symbol "EROC" later on Wednesday.
Context and market placement
The IPO takes place in a market environment where listings have returned to greater activity, with ERock positioned among companies leveraging renewed investor appetite for fresh public equity. The company’s customer base, geographic revenue concentration and planned capacity expansion are key operational details highlighted in the offering announcement.
Trading details
Shares were sold at $21.50 each, totaling roughly 27.9 million shares and $600 million in proceeds from the offering. The sale price represents the midpoint of the company’s indicated range of $20 to $23 per share.