AcquisitionManufacturing

ESS Tech, Inc. Acquires Long-Duration Energy

ESS acquired by ESS

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ESS
Acquired

ESS

USManufacturing

Undisclosed Amount

February 20, 2026

ESS
Acquirer

ESS

ESS Tech, Inc. (NYSE: GWH) has acquired ESS for an undisclosed amount, marking a strategic move to consolidate its core operations.

This corporate acquisition sees the public company formally integrate the entity known as ESS, which has been a pivotal force in the development and deployment of long-duration energy storage solutions.

ESS Tech, Inc. is a leading manufacturer of long-duration energy storage solutions, established in 2011 with a mission to accelerate decarbonization safely and sustainably.

The company utilizes easy-to-source iron, salt, and water in its proprietary iron flow technology, enabling decarbonization, energy security, reliability, and resilience.

This technology underpins flexible storage solutions designed to meet increasing energy demand and maximize the use of renewable energy.

The acquired ESS entity has been central to these innovations, contributing significantly to the company's technological advancements and market presence.

The acquisition is strategic for ESS Tech, Inc. as it streamlines corporate structure and enhances operational efficiencies.

By fully absorbing ESS, the company expects to achieve greater synergy across its research, development, manufacturing, and deployment processes.

This consolidation aims to optimize resource allocation, accelerate product innovation, and strengthen market leadership in the rapidly expanding long-duration energy storage sector.

The move is anticipated to foster a more unified approach to scaling its iron flow battery technology globally.

The combined entity is poised to further accelerate its mission of providing sustainable and reliable energy storage solutions. With a unified operational framework, ESS Tech, Inc.

is expected to enhance its capacity to deliver robust energy storage systems, supporting the global transition to a decarbonized energy future.

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