ClearSign Technologies Corp — Investor Relations & Filings
ClearSign Technologies Corp. develops and commercializes emission-control and combustion enhancement technologies for industrial applications. The company's primary offering is the ClearSign Core™ technology platform, which is integrated into a range of products including process burners, boiler burners, and flares. These solutions are designed to achieve ultra-low Nitrogen Oxide (NOx) emissions, enabling operators in the refining, petrochemical, oil and gas, and power generation industries to meet stringent environmental regulations. The technology emphasizes cost-effectiveness, energy efficiency, and the ability to be retrofitted into existing equipment. ClearSign's burners also support fuel flexibility, including the capability to fire hydrogen. Additionally, the company offers the ClearSign Eye™, an electrical flame sensor for industrial use.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| DEF 14A - ClearSign Technologies Corp (0001434524) (Filer) | 2026-04-28 | English | |
| 4 - ClearSign Technologies Corp (0001434524) (Issuer) | 2026-03-20 | English | |
| 4 - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-03-03 | English | |
| 4 - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-03-03 | English | |
| 8-K - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-02-25 | English | |
| 4 - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-02-25 | English |
| ID | Filing | Released | Lang | Actions | |
|---|---|---|---|---|---|
|
2026
9 filings
| |||||
| 38044875 | DEF 14A - ClearSign Technologies Corp (0001434524) (Filer) | 2026-04-28 | English | ||
| 32990428 | 4 - ClearSign Technologies Corp (0001434524) (Issuer) | 2026-03-20 | English | ||
| 32891806 | 4 - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-03-03 | English | ||
| 32891807 | 4 - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-03-03 | English | ||
| 32891809 | 8-K - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-02-25 | English | ||
| 32891808 | 4 - CLEARSIGN TECHNOLOGIES CORP (0001434524) (Filer) | 2026-02-25 | English | ||
| 29760889 | 4 Filing | 2026-02-04 | English | ||
| 29760890 | DEF 14A Filing | 2026-02-02 | English | ||
| 12214533 | FORM 8-K | 2026-01-07 | English | ||
|
2025
6 filings
| |||||
| 12214532 | FORM 8-K | 2025-12-08 | English | ||
| 12214534 | FORM 8-K | 2025-11-21 | English | ||
| 12214535 | FORM 8-K | 2025-11-17 | English | ||
| 12214536 | 10-Q | 2025-11-14 | English | ||
| 12214537 | OWNERSHIP DOCUMENT | 2025-10-03 | English | ||
| 12214538 | OWNERSHIP DOCUMENT | 2025-10-03 | English | ||
Market data
Market data not available
Price history
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ClearSign Technologies Corp via the API
Pull this company's filings, identifiers, and metadata as JSON or Markdown. Authenticate with your API key, then query by company ID, ISIN, or LEI. Full schema documented in the OpenAPI spec.
Endpoints
| GET | /api/companies/34669/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=34669 | Paginated list of all filings (filterable by type, date, language) |
| GET | /api/filings/{id}/ | Single filing — metadata, document URL, processing status |
| GET | /api/filings/{id}/markdown/ | Filing content as Markdown (PDF → text/tables/figures) |
| GET | /api/isins/?company=34669 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
cURL
$ curl https://api.financialreports.eu/api/filings/?company=34669 \ -H "x-api-key: $FR_API_KEY" \ -H "Accept: application/json"
Python
import requests r = requests.get( "https://api.financialreports.eu/api/filings/", params={"company": 34669}, headers={"x-api-key": API_KEY}, ) filings = r.json()["results"]
MCP server
// MCP server URL https://mcp.financialfilings.com/mcp // Once connected, the LLM can query this company directly: "Pull the latest 5 filings for ClearSign Technologies Corp (id: 34669)"
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