GWH 424B3: Secondary offering
ESS Tech, Inc.
Filed with the SEC on · accession 0001628280-26-062290
GWH filed a 424B3 (prospectus (offering)) with the SEC on Sep 16, 2026. The final terms of an offering of shares or bonds. The stock moved +0.9% by the first close after the filing.
Summary of the filing
ESS Tech, Inc. filed a prospectus for the resale of up to 13,120,000 shares of common stock by selling securityholders upon exercise of outstanding warrants, with potential cash proceeds to the company of up to $6.6 million.
Key details
How GWH stock reacted
Close before
$0.33
Sep 15, 2026
First close after
+0.93%
$0.34
5 trading days
+18.24%
$0.39
Since filing
-53.06%
$0.16
✦ Ask GOAX AI about this filing — what it means for GWH, what changed since its last filings and what to watch next.
Try it free for 7 days🔔 Want to stay updated on new SEC filings for GWH?
Click hereFrequently asked questions
What did GWH file with the SEC on Sep 16, 2026?
GWH filed a 424B3 (Secondary offering). ESS Tech, Inc. filed a prospectus for the resale of up to 13,120,000 shares of common stock by selling securityholders upon exercise of outstanding warrants, with potential cash proceeds to the company of up to $6.6 million.
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 424B3?
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 424B3 (prospectus (offering)): The final terms of an offering of shares or bonds.
How did GWH stock react to this filing?
GWH closed at $0.33 before the filing and $0.34 on Sep 16, 2026 (+0.93%). Five trading days later: $0.39 (+18.24%).
Other GWH SEC filings
- 8-K · Delisting noticeOct 5, 2026
- 8-K · SEC filingSep 30, 2026
- DEF 14A · Board changeSep 24, 2026
- EFFECT · SEC filingSep 16, 2026
- S-3 · Shelf registrationSep 8, 2026
- 8-K · SEC filingSep 3, 2026
- 8-K · Secondary offeringAug 21, 2026
- 424B5 · Secondary offeringAug 21, 2026
- SCHEDULE 13G/A · SEC filingAug 14, 2026
- SCHEDULE 13G/A · SEC filingAug 13, 2026
Get alerts when GWH files with the SEC, plus live charts, key levels and news for 13,000+ stocks.
Try SEPT free for 7 days