ClearSign Technologies Corp reports

Company location: Tulsa, OK
Fiscal year end: 31 December

ClearSign Technologies Corp has filed 781 SEC EDGAR filings since 05 May 2008

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SEC filing history

Showing 201-225 of 780 matching filings.

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25

Current page

9

DEF 14A File 001-35521

DEF 14A

Filing date: 25 Apr 2023
Reporting date: 06 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

PRE 14A File 001-35521

PRE 14A

Filing date: 14 Apr 2023
Reporting date: 06 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-35521

FORM 8-K

Filing date: 07 Apr 2023
Reporting date: 06 Apr 2023
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 05 Apr 2023
Reporting date: 03 Apr 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Apr 2023
Reporting date: 03 Apr 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Apr 2023
Reporting date: 03 Apr 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Apr 2023
Reporting date: 03 Apr 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

S-8 File 333-271042

FORM S-8

Filing date: 31 Mar 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

10-K File 001-35521

10-K

Filing date: 31 Mar 2023
Reporting date: 31 Dec 2022
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 001-35521

FORM 8-K

Filing date: 24 Feb 2023
Reporting date: 18 Feb 2023
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 23 Feb 2023
Reporting date: 23 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

3

OWNERSHIP DOCUMENT

Filing date: 23 Feb 2023
Reporting date: 21 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 14 Feb 2023
Reporting date: 02 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 14 Feb 2023
Reporting date: 02 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Jan 2023
Reporting date: 03 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Jan 2023
Reporting date: 03 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Jan 2023
Reporting date: 03 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Jan 2023
Reporting date: 03 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-35521

FORM 8-K

Filing date: 09 Dec 2022
Reporting date: 01 Dec 2022
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

10-Q File 001-35521

10-Q

Filing date: 14 Nov 2022
Reporting date: 30 Sep 2022
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 001-35521

FORM 8-K

Filing date: 04 Nov 2022
Reporting date: 01 Nov 2022
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Oct 2022
Reporting date: 03 Oct 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Oct 2022
Reporting date: 03 Oct 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Oct 2022
Reporting date: 03 Oct 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Oct 2022
Reporting date: 03 Oct 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

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