ESS Tech, Inc. (GWH) Institutional Ownership

Ownership Summary

Recent 13F filings as of December 2025 show that 53 institutional investors hold a position in ESS Tech, Inc. (NYSE:GWH).

• These investors collectively held 51.5% of the company's total shares outstanding in December 2025, up from 30.2% in September 2025.
• The company experienced a 75.25% quarterly change in institutional shares held, alongside a decrease of 3.64% in total owners annually.
• During the quarter, 33 institutions bought more ESS Tech shares, 5 sold shares, and 15 of the 53 total investors held their position steady.
• This class of investors increased its holdings in ESS Tech to 6.36Mn shares for the 13F-cycle ending December 2025, up by 2.73Mn shares quarter on quarter, and up 2.90Mn shares year over year.
• As of December 31, 2025, SOFTBANK GROUP CORP. held ESS Tech's largest shareholding position with over 2.40Mn shares, representing 19.42% of total outstanding shares.
• Among the most significant buyers of ESS Tech during December 2025 were Alyeska Investment Group, L.P. (1.40Mn), Arosa Capital Management LP (274.58K), VANGUARD GROUP INC (221.59K), Shay Capital LLC (180.00K), Green Alpha Advisors, LLC (108.06K).
• Leading sellers of ESS Tech stock in December 2025 included MORGAN STANLEY (3.13K), BlackRock, Inc. (2.78K), Tower Research Capital LLC (TRC) (2.15K), BNP PARIBAS FINANCIAL MARKETS (284), Golden State Wealth Management, LLC (13).
• The top 10 institutional holders of ESS Tech for the quarter ending December 2025 included SOFTBANK GROUP CORP. (2.40Mn), Alyeska Investment Group, L.P. (1.40Mn), Arosa Capital Management LP (950.00K), VANGUARD GROUP INC (485.92K), Shay Capital LLC (180.00K), GEODE CAPITAL MANAGEMENT, LLC (136.47K), Green Alpha Advisors, LLC (118.68K), JANE STREET GROUP, LLC (109.01K), Pathstone Holdings, LLC (88.98K), GSA CAPITAL PARTNERS LLP (74.72K).