EIG and Acwa Power Form Plenum Power Partnership

The new joint venture targets a $4 billion investment in U.S. power infrastructure to meet rising electricity demand.

Updated on Oct. 29, 2026 in Utilities

Isometric editorial illustration showing electrical power transmission equipment and industrial infrastructure in a muted, flat-color palette. — EIG and Acwa Power have launched Plenum Power, a $4 billion joint venture to develop and acquire energy infrastructure across the United States. AI Illustration. Upload story photo >

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EIG and Acwa have signed agreements to create Plenum Power, a new partnership aimed at developing and acquiring energy infrastructure in the United States. The venture leverages the combined experience of both firms to address increasing power needs driven by electrification and AI data centers.

Why it matters

The venture seeks to capitalize on the surging electricity demand in the U.S. that has been fueled by the widespread adoption of AI technology and broad electrification initiatives. By combining specialized operational and financing expertise, the partners aim to scale capacity efficiently in a high-demand market.

Plenum Power plans to launch with a $4 billion initial equity commitment. This builds on Acwa's existing portfolio, which manages $127 billion in assets and 98.2 GW of power generation capacity.

The players

EIG

An institutional investor in the global energy sector that manages $27.1 billion in assets and is headquartered in Washington, D.C.

Acwa

A developer and operator of power and desalinated water assets based in Riyadh, Saudi Arabia, managing $127 billion in total assets.

Plenum Power

A newly formed joint venture between EIG and Acwa created to focus on U.S. power infrastructure investments.

The details

The partnership combines Acwa's technical background in large-scale infrastructure and operations with EIG's established track record in financing energy platforms. The entities plan to focus on both new capacity development and the acquisition of existing power infrastructure across the United States.

October 29, 2026: EIG and Acwa officially announced the creation of their partnership.
July 2026: Acwa reported its total portfolio and asset status.
June 30, 2026: EIG reported its assets under management.
2004: Acwa was originally registered and established in Riyadh, Saudi Arabia.

Market Landscape

The formation of Plenum Power mirrors a broader industry trend where private equity firms are increasingly partnering with global utility operators to address the surge in U.S. electricity demand from AI data centers. This move positions the entities to capture market share in a rapidly evolving domestic infrastructure landscape.

The investment aims to expand power capacity, which could eventually help stabilize electricity supply as demand from AI and electrification continues to grow. Customers may see the impact through long-term grid reliability as new infrastructure projects come online.

The takeaway

The partnership highlights how essential infrastructure development is increasingly attracting global capital to address domestic grid constraints. Investors and local stakeholders should monitor how these large-scale commitments influence regional power availability in the coming years.