---
schema_version: "secwatch.filing_event.v1"
accession: "0001819438-26-000065"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2026-07-16T22:14:26+00:00"
generated_at: "2026-07-17T10:05:55.105645+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# ESS Tech amends ATM program to sell $75M shares; adds Roth Capital as agent

## Summary
- Terminated BMO, Canaccord, Needham, and Stifel as sales agents under the ATM program.
- Added Roth Capital Partners as a sales agent and qualified independent underwriter.
- ATM program remains for up to $75 million of common stock, originally dated Nov 13, 2025.
- Amendment filed as Exhibit 1.1; prospectus supplement amended accordingly.

## SEC filing metadata
- accession: 0001819438-26-000065
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2026-07-16T22:14:26+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000181943826000065/0001819438-26-000065-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000181943826000065/wk-20260716.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001819438-26-000065
- JSON: https://secwatch.observer/filing/0001819438-26-000065.json
- Plain text: https://secwatch.observer/filing/0001819438-26-000065.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.