---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-052998"
form_type: "8-K"
ticker: "CLIR"
cik: "0001434524"
company_name: "ClearSign Technologies Corp"
filed_at: "2025-05-27T23:59:59+00:00"
generated_at: "2026-05-20T10:27:56.332642+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# ClearSign expands board to 7, appoints Basenese and DiGiandomenico; Maley not standing for re-election

## Summary
- Board expanded from 5 to 7; appointed Louis Basenese and Anthony DiGiandomenico effective May 22, 2025.
- Cooperation agreements with Clarkson and DiGiandomenico parties end activist nominations; standstill and voting commitments.
- David Maley will not stand for re-election at 2025 annual meeting; not due to disagreement.
- New directors receive RSU compensation; DiGiandomenico declined initial grant for quarter ending June 30, 2025.
- Company reimbursed Clarkson up to $2,000 and DiGiandomenico up to $20,000 for expenses.

## SEC filing metadata
- accession: 0001104659-25-052998
- form_type: 8-K
- ticker: CLIR
- cik: 0001434524
- company_name: ClearSign Technologies Corp
- filed_at: 2025-05-27T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1434524/000110465925052998/0001104659-25-052998-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1434524/000110465925052998/tm2516138d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-052998
- JSON: https://secwatch.observer/filing/0001104659-25-052998.json
- Plain text: https://secwatch.observer/filing/0001104659-25-052998.txt

## Key facts
- Executive change
  Anthony DiGiandomenico was appointed as Director at ClearSign Technologies Corp.
  - Action: appointed
  - Role: Director
  source text: On the Effective Date, the Board increased the size of the Board from five to seven directors and appointed each New Director as a member of the Board, effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465925052998/0001104659-25-052998-index.htm
- Executive change
  Louis Basenese was appointed as Director at ClearSign Technologies Corp.
  - Action: appointed
  - Role: Director
  source text: On the Effective Date, the Board increased the size of the Board from five to seven directors and appointed each New Director as a member of the Board, effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/1434524/000110465925052998/0001104659-25-052998-index.htm

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