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GWH 424B5: Secondary offering

Filed with the SEC on · accession 0001819438-26-000075

GWH filed a 424B5 (prospectus (offering)) with the SEC on Aug 21, 2026. ESS Tech, Inc. is offering 6,400,000 shares of common stock at $0.50 per share in a public offering, with a concurrent private placement of warrants to purchase up to 12,800,000 shares at the same exercise price. The stock moved +3.4% by the first close after the filing.

Summary of the filing

ESS Tech, Inc. is offering 6,400,000 shares of common stock at $0.50 per share in a public offering, with a concurrent private placement of warrants to purchase up to 12,800,000 shares at the same exercise price. Roth Capital Partners is acting as exclusive placement agent.

For details, click here →How to read a 424B5 →

Key details

Total offering value$3.2M
Net proceeds to company before expenses$3.0M
Placement agent fees$224K
IssuerESS Tech, Inc.
Placement agentRoth Capital Partners, LLC

How GWH stock reacted

Close before

$0.39

Aug 20, 2026

First close after

+3.37%

$0.40

5 trading days

-8.33%

$0.36

Since filing

-59.97%

$0.16

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Frequently asked questions

What did GWH file with the SEC on Aug 21, 2026?

GWH filed a 424B5 (Secondary offering). ESS Tech, Inc. is offering 6,400,000 shares of common stock at $0.50 per share in a public offering, with a concurrent private placement of warrants to purchase up to 12,800,000 shares at the same exercise price. Roth Capital Partners is acting as exclusive placement agent.

What does a secondary offering mean for GWH stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a 424B5?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did GWH stock react to this filing?

GWH closed at $0.39 before the filing and $0.40 on Aug 21, 2026 (+3.37%). Five trading days later: $0.36 (-8.33%).

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