---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-095017"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2025-09-30T23:59:59+00:00"
generated_at: "2026-05-17T05:15:04.510301+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# ClearSign receives Nasdaq extension to March 2026 to regain $1 bid price compliance

## Summary
- Received 180-day extension from Nasdaq; compliance deadline now March 30, 2026.
- Must achieve closing bid price of $1 for 10 consecutive business days to regain compliance.
- Company stated it intends to use a reverse stock split if necessary to meet the requirement.
- Failure to comply could lead to delisting; appeal rights would be available.
- Stock continues trading on Nasdaq Capital Market under symbol CLIR with no immediate effect.

## SEC filing metadata
- accession: 0001104659-25-095017
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2025-09-30T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 3.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465925095017/0001104659-25-095017-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465925095017/tm2527606d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-095017
- JSON: https://secwatch.observer/filing/0001104659-25-095017.json
- Plain text: https://secwatch.observer/filing/0001104659-25-095017.txt

## Key facts
- Listing & Compliance Notices
  ClearSign Technologies Corp received a nasdaq extension granted notice regarding minimum bid price (rules 5550(a)(2)).
  - Exchange: nasdaq
  - Notice: extension granted
  - Deficiency: minimum bid price
  - Rules: 5550(a)(2)
  source text: September 30, 2025, the Company received a second letter from Nasdaq granting the Company’s request for a 180-day extension to regain compliance with the Bid Price Rule. The Company now has until March 30, 2026, to meet the requirement. As part of the Company’s request for the 180-day extension, the Company notified Nasdaq that it intends to regain compliance with the Bid Price Rule by effecting a reverse stock split, if necessary. If at any time prior to March 30, 2026, the bid price of the Company’s common stock closes at $1 per share or more for a minimum of 10 consecutive business days, th
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465925095017/0001104659-25-095017-index.htm

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