---
schema_version: "secwatch.filing_event.v1"
accession: "0001819438-26-000032"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2026-05-07T23:59:59+00:00"
generated_at: "2026-05-14T21:59:44.865215+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# ESS Tech Q1 net loss narrows to $15.9M; revenue $128k; new AFRL and SRP/Google deals

## Summary
- Revenue $128K vs $0.6M YoY; net loss $(15.9)M ($0.54 per share) vs $(18.0)M prior year.
- Adjusted EBITDA loss improved 31% to $(10.3)M; total operating expenses down 33%.
- Total liquidity $21.5M as of Mar 31; closed $15M direct offering at $1.75/share.
- Awarded $9.9M contract with CTC/AFRL for up to 27 MWh storage system.
- Project New Horizon pilot with SRP/Google (5MW/50MWh); delivery targeted Dec 2027.

## SEC filing metadata
- accession: 0001819438-26-000032
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2026-05-07T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000181943826000032/0001819438-26-000032-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000181943826000032/wk-20260507.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001819438-26-000032
- JSON: https://secwatch.observer/filing/0001819438-26-000032.json
- Plain text: https://secwatch.observer/filing/0001819438-26-000032.txt

## Source-grounded claims
- claim_id: bd226e1a37712b66d8a4aa2b3498b6d581fa637e
  claim: ESS Tech, Inc. reported first quarter ended March 31, 2026 results: revenue $128 thousand, net income $(15.9) million, EPS $(0.54) per share.
  evidence_excerpt: the Company continued its leadership and organizational reset focused on governance, execution, and financial discipline. First Quarter 2026 Financial Highlights • Revenue was $128 thousand for the three months ended March 31, 2026, compared with $0.6 million in the prior-year period due to fewer deliveries of equipment to customers. • Total operating expenses
  evidence_url: https://www.sec.gov/Archives/edgar/data/1819438/000181943826000032/0001819438-26-000032-index.htm

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