ESS Tech
ESS Tech raises $130M PIPE at $400M valuation
Quick Facts
ESS Tech: PIPE Funding Round
ESS Tech has successfully raised $130M in PIPE funding, reaching a valuation of $400M.
Company Overview
Long-duration iron flow batteries
Funding Details
The PIPE round was led by Breakthrough Energy Ventures, with participation from SoftBank Vision Fund, Evok Innovations.
Company Information
- Headquarters: 10870 SW Boeckman Road, Wilsonville, OR 97070
- Founded: 2011
- Employees: 150+
- Category: Energy Storage
Investment
ESS Tech plans to use the funds to accelerate product development, expand its team, and scale operations globally.
About the Investors
- Breakthrough Energy Ventures: Verified investor in PIPE
- SoftBank Vision Fund: Verified investor in PIPE
- Evok Innovations: Verified investor in PIPE
Key Investors
About the Author

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