---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-24-011404"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2024-02-07T23:59:59+00:00"
generated_at: "2026-06-06T06:53:31.648004+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# ClearSign reports Q4 revenue ~$1.2M, up from $50K YoY; FY revenue $2.3M, loss narrows

## Summary
- Q4 2023 revenue approximately $1.2 million, compared to $50 thousand in Q4 2022.
- Full year 2023 revenue approximately $2.3 million, compared to $374 thousand in 2022.
- Preliminary net loss for 2023 estimated between $5.1M and $5.4M, narrowing from $5.8M loss in 2022.
- Completed largest refinery heater installation in California; achieved third-party emissions guarantee validation.

## SEC filing metadata
- accession: 0001104659-24-011404
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2024-02-07T23:59:59+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/1434524/000110465924011404/0001104659-24-011404-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465924011404/tm245403d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-24-011404
- JSON: https://secwatch.observer/filing/0001104659-24-011404.json
- Plain text: https://secwatch.observer/filing/0001104659-24-011404.txt

## Key facts
- Earnings Releases
  ClearSign Technologies Corp reported fiscal year ended December 31, 2023 results: revenue approximately $2.3 million, net income between $5.4 to $5.1 million.
  - Period: fiscal year ended December 31, 2023
  - Revenue: approximately $2.3 million
  - Net income: between $5.4 to $5.1 million
  - Result: preliminary results
  source text: The Company's estimated preliminary revenues for the year ended December 31, 2023 was $2.3 million, compared to $374 thousand for the year ended December 31, 2022. Additionally, the Company reported a net loss of approximately $5.8 million for the year ended December 31, 2022, and estimates that the preliminary net loss for the year ended December 31, 2023 will range between $5.4 to $5.1 million.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465924011404/0001104659-24-011404-index.htm
- Earnings Releases
  ClearSign Technologies Corp reported fourth quarter ended December 31, 2023 results: revenue approximately $1.2 million.
  - Period: fourth quarter ended December 31, 2023
  - Revenue: approximately $1.2 million
  - Result: preliminary results
  source text: Preliminary revenues for the three months ended December 31, 2023 was approximately $1.2 million, compared to $50 thousand for the comparable period in 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465924011404/0001104659-24-011404-index.htm

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