---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-24-050306"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2024-04-23T23:59:59+00:00"
generated_at: "2026-06-03T11:45:29.735721+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# ClearSign Technologies raises $5M in private placement with amended securities purchase agreement

## Summary
- Entered amendment to securities purchase agreement with investor Andrew Schwartzberg on April 22, 2024.
- Total gross proceeds of approximately $5,000,000 from issuance of common stock, pre-funded warrants, and redeemable warrants.
- Private placement includes 2,249,763 common shares, pre-funded warrants for 3,155,642 shares, and redeemable warrants for up to 8,108,106 shares.
- Transaction exempt from registration under Securities Act Section 4(a)(2) and Rule 506(b).
- Closing expected on April 23, 2024, subject to customary conditions.

## SEC filing metadata
- accession: 0001104659-24-050306
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2024-04-23T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465924050306/0001104659-24-050306-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465924050306/tm2412465d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-24-050306
- JSON: https://secwatch.observer/filing/0001104659-24-050306.json
- Plain text: https://secwatch.observer/filing/0001104659-24-050306.txt

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