ESS Tech, Inc. (NYSE: GWH), a leading manufacturer of long-duration iron flow energy storage solutions, announced the closing of its previously announced registered direct offering with institutional investors. The transaction, which closed on January 30, 2026, raised approximately $15 million through the sale of 8,571,428 shares of common stock and pre-funded warrants at a price of $1.75 per share. This price represents a premium to the company's closing price on January 28, 2026.
The offering generated aggregate gross proceeds of approximately $15 million. Net proceeds, together with existing cash, are expected to be used for general corporate purposes and working capital. Aegis Capital Corp. served as the exclusive placement agent for the offering. This capital infusion comes at a critical time as ESS continues to scale its iron flow battery technology, which uses iron, salt, and water to provide long-duration energy storage.
ESS's iron flow technology is designed to accelerate decarbonization safely and sustainably, offering energy security, reliability, and resilience. The company's storage solutions help customers meet increasing energy demand without power disruptions and maximize the value of excess energy. With the additional funding, ESS aims to strengthen its balance sheet and support ongoing operations and growth initiatives.
For more details on the offering, refer to the full press release at https://ibn.fm/BUYEF. Information about ESS Tech, Inc. is available at https://www.essinc.com.
This offering underscores investor confidence in ESS's long-duration energy storage technology, which addresses the growing need for reliable renewable energy integration. By securing $15 million at a premium to market price, ESS demonstrates financial viability and strategic positioning in the clean energy sector. The funds are expected to support product development, manufacturing scale-up, and market expansion, potentially accelerating adoption of iron flow batteries for grid-scale storage applications.
The implications of this capital raise extend beyond ESS. It signals continued institutional interest in alternative energy storage solutions that avoid reliance on scarce materials like lithium. Iron flow batteries offer a sustainable, cost-effective option for long-duration storage, which is essential for balancing intermittent renewable sources like solar and wind. As global energy transition efforts intensify, ESS's technology could play a pivotal role in enhancing grid stability and enabling higher penetration of renewables.
Investors and industry observers will monitor how ESS deploys these funds to achieve operational milestones and capture market share. The company's ability to secure capital at a premium suggests confidence in its business model and growth prospects. With this funding, ESS is better positioned to compete in the rapidly evolving energy storage market, potentially driving broader adoption of iron flow technology and contributing to global decarbonization goals.
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