It primarily serves data centers, utilities, and large commercial & industrial (C&I) customers, with major footprints in California and Texas.
- Sector: Industrials
- Industry: Specialty Industrial Machinery
- Full Time Employees: 440
- Founded in 2006
- HQ in Houston, Texas
- https://erock.com
Pricing: $21.50 per share (midpoint of the $20.00–$23.00 range).
Shares offered: 27,906,977 shares of Class A common stock, raising approximately $600 million in gross proceeds.
The company is experiencing heightened demand from AI as data centers require massive, reliable power for AI workloads and GPU clusters. Its quick-response natural gas generators provide immediate, dispatchable power to support AI infrastructure expansion while grid capacity lags, making ERock a critical partner for AI companies needing rapid power deployment.
At the center of Erock's platform is RockBlock, a modular, distributed generator string that incorporates the company's proprietary natural gas engine, scales in 0.5 MW increments from 1.5 MW to 3.5 MW per RockBlock, and is assembled in-house. The generator technology is also supported by its Granite Software Ecosystem.
Over the past decade, the company has built relationships with leading data center and AI firms, such as Microsoft (MSFT), Wistron, and Foxconn; electric and gas utilities, such as Entergy (ETR), and ComEd (EXC); and C&I customers, such as H-E-B and Walmart (WMT).
