ESS Tech, Inc. (ESS) (NYSE : GWH), a leading manufacturer of iron flow long-duration energy storage systems (LDES) for commercial and utility-scale applications, today announced that it will hold a conference call on Monday, March 31, 2025 at 5:00 p.m. EDT to discuss financial results for its fourth quarter and full year 2024 ended December 31, 2024.

The news release announcing the fourth quarter and full year 2024 financial results will be disseminated on March 31, 2025 after the market closes.

Interested parties may join the conference call beginning at 5:00 p.m. EDT on Monday, March 31, 2025 via telephone by calling (833) 470-1428 in the U.S., or for international callers, by calling +1 (404) 975-4839 and entering conference ID 424622. A telephone replay will be available until April 7, 2025, by dialing (866) 813-9403 in the U.S., or for international callers, +1 (929) 458-6194 with conference ID 327175. A live webcast of the conference call will be available on ESS' Investor Relations website at http://investors.essinc.com/.

A replay of the call will be available via the web at http://investors.essinc.com/.

About ESS Tech Inc.

ESS (NYSE:GWH) is the leading manufacturer of long-duration iron flow energy storage solutions. ESS was established in 2011 with a mission to accelerate decarbonization safely and sustainably through longer lasting energy storage. Using easy-to-source iron, salt, and water, ESS iron flow technology enables energy security, reliability and resilience. We build flexible storage solutions that allow our customers to meet increasing energy demand without power disruptions and maximize the value potential of excess energy. For more information, visit www.essinc.com.

View source version on businesswire.com: https://www.businesswire.com/news/home/20250319474419/en/

Investors:

Erik Bylin

investors@essinc.com

Media:

Morgan Pitts

503.568.0755

morgan.pitts@essinc.com

ESS Schedules Fourth Quarter and Full Year 2024 Financial Results Conference Call