---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-052045"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2025-11-13T23:59:59+00:00"
generated_at: "2026-05-16T20:31:18.795895+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# ESS Tech launches $75M at-the-market offering; proceeds to repay Yorkville promissory note

## Summary
- Entered ATM agreement with Yorkville, BMO, Canaccord, Needham & Stifel to sell up to $75M of common stock.
- Net proceeds first satisfy installment payments within 30 days on Promissory Note to YA II PN (Yorkville affiliate).
- After that, 80% of remaining proceeds used to repay Promissory Note in order of maturity; 20% for working capital.
- Agents receive 3% commission on gross sales; Canaccord acts as qualified independent underwriter.
- Offering under Rule 415; Company not obligated to sell any shares, but agents will use commercially reasonable efforts.

## SEC filing metadata
- accession: 0001628280-25-052045
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2025-11-13T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000162828025052045/0001628280-25-052045-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000162828025052045/wk-20251113.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-052045
- JSON: https://secwatch.observer/filing/0001628280-25-052045.json
- Plain text: https://secwatch.observer/filing/0001628280-25-052045.txt

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