# ClearSign Technologies Corp: Form SCHEDULE 13D/A, filed Feb 19, 2025

- Company: [ClearSign Technologies Corp](/companies/clir.md) (CIK 1434524)
- Form: SCHEDULE 13D/A
- Filed: 2025-02-19
- Accepted by EDGAR: Feb 19, 2025, 22:05 ET
- Period: not reported
- Accession: 0001014108-25-000018
- Inline XBRL: no
- Main document: https://www.sec.gov/Archives/edgar/data/1434524/000101410825000018/xslSCHEDULE_13D_X01/primary_doc.xml
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/1434524/000101410825000018/

## Sections

Sections are extracted only from 10-K and 10-Q reports. Read this filing’s documents on sec.gov. https://www.sec.gov/Archives/edgar/data/1434524/000101410825000018/xslSCHEDULE_13D_X01/primary_doc.xml

Filed Feb 19, 2025.
Source: SEC EDGAR, the filing index for accession 0001014108-25-000018. Last ingested by Listed: Oct 24, 2026, 15:08 ET. No prices; not investment advice.