ClearSign Technologies Corp reports

Company Names, identifiers, and filing context for this profile. 1 identity field
Company location
Tulsa, OK
SEC filing record 1 source field available
Fiscal year end
31 December
ClearSign Technologies Corp has filed 789 SEC EDGAR filings since 05 May 2008

SEC filing history

Showing 51-75 of 788 matching filings.

Per page
25
Current page
3
424B4 File 333-289549

424B4

Filing date
22 Aug 2025
Reporting date
Not listed
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EFFECT File 333-289549

EFFECT filing

Filing date
21 Aug 2025
Reporting date
Not listed
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CORRESP

CORRESP filing

Filing date
20 Aug 2025
Reporting date
Not listed
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S-1/A File 333-289549

FORM S-1/A

Filing date
20 Aug 2025
Reporting date
Not listed
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UPLOAD File 333-289549

UPLOAD filing

Filing date
14 Aug 2025
Reporting date
Not listed
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EFFECT File 333-288736

EFFECT filing

Filing date
28 Jul 2025
Reporting date
Not listed
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CORRESP

CORRESP filing

Filing date
24 Jul 2025
Reporting date
Not listed
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UPLOAD File 333-288736

UPLOAD filing

Filing date
24 Jul 2025
Reporting date
Not listed
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S-3 File 333-288736

FORM S-3

Filing date
17 Jul 2025
Reporting date
Not listed
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DEFA14A File 001-35521

DEFA14A

Filing date
11 Jul 2025
Reporting date
Not listed
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4

OWNERSHIP DOCUMENT

Filing date
03 Jul 2025
Reporting date
01 Jul 2025
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4

OWNERSHIP DOCUMENT

Filing date
03 Jul 2025
Reporting date
01 Jul 2025
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4

OWNERSHIP DOCUMENT

Filing date
03 Jul 2025
Reporting date
01 Jul 2025
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4

OWNERSHIP DOCUMENT

Filing date
03 Jul 2025
Reporting date
01 Jul 2025
SEC evidence
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4

OWNERSHIP DOCUMENT

Filing date
03 Jul 2025
Reporting date
01 Jul 2025
SEC evidence
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ARS File 001-35521

ARS

Filing date
13 Jun 2025
Reporting date
31 Dec 2024
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