---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-23-037344"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2023-11-07T23:59:59+00:00"
generated_at: "2026-06-08T16:59:38.885997+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# ESS Tech reports YTD revenue of $4.7M (+700% YoY), guides FY23 revenue to $9M, announces strategic Honeywell partnership

## Summary
- YTD revenue $4.7M, up ~700% YoY; expects Q4 revenue material increase leading to ~$9M full year.
- Honeywell invests $42.5M and targets $300M product purchases over coming years; ESS will integrate Honeywell's flow-battery IP.
- Completed commissioning of six Energy Warehouse systems for SMUD; multi-year agreement for up to 2 GWh of storage.
- Finalizing agreement with LEAG for 500 MWh iron flow battery system in Germany, with potential for up to 20 GWh green-energy hub.
- Appointed Jeff Loebbaka as CCO and Harry Quarls as Chairman of the Board.

## SEC filing metadata
- accession: 0001628280-23-037344
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2023-11-07T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000162828023037344/0001628280-23-037344-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000162828023037344/wk-20231107.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-23-037344
- JSON: https://secwatch.observer/filing/0001628280-23-037344.json
- Plain text: https://secwatch.observer/filing/0001628280-23-037344.txt

## Key facts
- Earnings Releases
  ESS Tech, Inc. reported financial results for third quarter ended September 30, 2023.
  - Period: third quarter ended September 30, 2023
  - Result: reported results
  source text: On November 7, 2023 , ESS Tech, Inc. (the “Company”) issued a press release announcing financial results for the quarter ended September 30, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1819438/000162828023037344/0001628280-23-037344-index.htm

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