---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-23-032880"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2023-09-25T23:59:59+00:00"
generated_at: "2026-06-10T09:18:49.574473+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# ESS Tech gets $27.5M equity investment from Honeywell, enters supply and IP deals

## Summary
- Honeywell Ventures invested $27.5M for 16.5M common shares and a warrant for 10.6M shares at $1.89.
- UOP (Honeywell) licenses IP to ESS, receives IP warrant for 6.3M shares at $2.90; both warrants expire 2028.
- UOP pre-paid $15M for equipment, triggering an initial performance warrant for 775,760 shares at $1.45.
- Potential future equipment purchases up to $300M by 2030 could generate additional performance warrants.
- Joint development agreement on flow battery tech; registration rights granted to Honeywell Ventures.

## SEC filing metadata
- accession: 0001628280-23-032880
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2023-09-25T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.01, 3.02, 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000162828023032880/0001628280-23-032880-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000162828023032880/wk-20230925.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-23-032880
- JSON: https://secwatch.observer/filing/0001628280-23-032880.json
- Plain text: https://secwatch.observer/filing/0001628280-23-032880.txt

## Key facts
- Material Agreements
  ESS Tech, Inc. entered into Master Supply Agreement with UOP valued at equipment supplied by the Company; initial performance warrant to issue up to 775,760 shares of Comm (effective 2023-09-21).
  - Action: entry
  - Agreement: supply
  - Counterparty: UOP
  - Value: equipment supplied by the Company; initial performance warrant to issue up to 775,760 shares of Comm
  - Effective: 2023-09-21
  source text: the Company and UOP also entered into a Master Supply Agreement, pursuant to which UOP may purchase equipment supplied by the Company (the “Supply Agreement”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1819438/000162828023032880/0001628280-23-032880-index.htm

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