VoltaGrid has announced a $1 billion strategic equity investment from funds managed by Blackstone Tactical Opportunities and Halliburton Company, alongside a definitive agreement to acquire Propell Energy Technology Ltd. and its affiliates. The investment is composed of a $775 million primary capital raise and a $225 million secondary purchase from existing investors. Both transactions are subject to customary closing conditions and are expected to close in mid-2026.
The capital raise will accelerate deployment of VoltaGrid’s behind-the-meter power generation solutions for data centers, microgrids, and industrial applications. Founded in 2020 and headquartered in Houston, VoltaGrid provides behind-the-meter generation, portable power, CNG fuel supply, infrastructure, and energy management services to data centers, AI infrastructure, utilities, and industrial customers across North America and beyond. The company carries an approximately 7.5 gigawatt order book through 2030.
The acquisition of Propell — a key VoltaGrid supplier founded in 1978 with approximately 1,000 employees across the United States and Canada — is designed to reduce execution risk across that order book by strengthening supply chain access and control. Propell is a central partner in the manufacturing of VoltaGrid’s proprietary high-inertia QPac system, developed specifically for AI data centers, and brings R&D, manufacturing, integration services, and turnkey after-sales capabilities in reciprocating engines and turbine technologies. As part of the transaction, VoltaGrid will immediately invest in expanding Propell’s Granbury, Texas, facilities by building two additional next-generation automated manufacturing plants, growing capacity to approximately 300 megawatts per month.
Support: Goldman Sachs served as financial advisor to VoltaGrid, with Kirkland & Ellis and Sidley Austin serving as legal advisors. Morgan Stanley and Lazard advised Blackstone, with Simpson Thacher & Bartlett serving as legal advisor. Deloitte Corporate Finance acted as financial advisor to Propell.
KEY QUOTES:
“This partnership with Blackstone is a powerful endorsement of the platform we have built and the role VoltaGrid is playing in delivering the energy infrastructure of the AI era. Blackstone’s scale and sector expertise make them an ideal partner as we accelerate the deployment of our behind-the-meter power solutions to meet unprecedented customer demand. The acquisition of Propell adds proven engineering and integration capabilities that will further extend our technology and operational leadership as we continue to scale.”
Nathan Ough, Founder and CEO, VoltaGrid
“VoltaGrid is a highly differentiated platform addressing one of the most important infrastructure needs of the AI era: reliable, rapidly deployable power. This investment is a strong example of Tac Opps’ focus on providing flexible, scaled capital to exceptional entrepreneurs and businesses operating in Blackstone’s highest-conviction investment themes.”
William Nicholson, Managing Director, Blackstone
