---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-063815"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2023-05-24T23:59:59+00:00"
generated_at: "2026-06-14T15:51:00.591053+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# ClearSign Q1 revenue $900k vs zero YoY; secures multiple burner orders in California and Texas

## Summary
- Q1 2023 revenue ~$900k, compared to zero in Q1 2022; cash $8.5M as of March 31, 2023.
- Received engineering order and follow-on order for 13 burners for two heaters from a California refinery.
- Completed Phase 1 testing of ultra-low NOx hydrogen burner; submitted Phase 2 grant proposal for up to $1.6M.
- Entered Texas Gulf Coast market with burner sale to global chemical company; installation scheduled Q3 2023.
- Announced first two boiler burner sales into California market in medical waste and recycling services verticals.

## SEC filing metadata
- accession: 0001104659-23-063815
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2023-05-24T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465923063815/0001104659-23-063815-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465923063815/tm2316656d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-063815
- JSON: https://secwatch.observer/filing/0001104659-23-063815.json
- Plain text: https://secwatch.observer/filing/0001104659-23-063815.txt

## Key facts
- Earnings Releases
  ClearSign Technologies Corp reported the first quarter ended March 31, 2023 results: revenue $900 thousand.
  - Period: the first quarter ended March 31, 2023
  - Revenue: $900 thousand
  - Result: reported results
  source text: The Company recognized approximately $900 thousand in revenue during the three months ended March 31, 2023, as compared to zero revenue for the same period of 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465923063815/0001104659-23-063815-index.htm

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