---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-001752"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2026-01-07T23:59:59+00:00"
generated_at: "2026-05-16T11:20:11.391397+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# ClearSign preliminary Q4 revenue ~$3.6M (+510% YoY), FY revenue ~$5.2M (+44% YoY)

## Summary
- Preliminary Q4 2025 revenue of approx $3.6M, up 510% from $590K in Q4 2024.
- Preliminary FY 2025 revenue of approx $5.2M, up 44% from $3.6M in FY 2024.
- Q4 performance driven by completion of a 26-burner order for a U.S. Gulf Coast petrochemical facility.
- Revenue also included testing, engineering, flares, and service work across multiple product lines.
- CEO expects growth trajectory to sustain or exceed in 2026, citing expanded burner portfolio and order pipeline.

## SEC filing metadata
- accession: 0001104659-26-001752
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2026-01-07T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465926001752/0001104659-26-001752-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465926001752/tm262320d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-001752
- JSON: https://secwatch.observer/filing/0001104659-26-001752.json
- Plain text: https://secwatch.observer/filing/0001104659-26-001752.txt

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