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ClearSign Technologies Corp — S-1/A Filings

8 S-1/A filings on record

This page lists all S-1/A filings submitted to the SEC by ClearSign Technologies Corp (CLIR), sorted by most recent first. Each row links to the full filing on EdgarLookup. ClearSign Technologies Corp has filed 8 S-1/A documents with the SEC since 2008. To view all SEC filings by ClearSign Technologies Corp, see the full filings list.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-Q 10-Q/A 25-NSE 3 4 4/A 424B1 424B2 424B3 424B4 424B5 5 8-A12B 8-A12B/A 8-K 8-K/A ARS CERTNAS CORRESP D D/A DEF 14A DEFA14A DEFR14A EFFECT FWP NT 10-Q POS AM PRE 14A PREC14A PREN14A PRRN14A REGDEX RW S-1 S-1/A S-3 S-3/A S-8 S-8 POS SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13D/A SCHEDULE 13G UPLOAD
Form Description Accession Number Filed Period
S-1/A FORM S-1/A 0001104659-25-080929 Aug 20, 2025
S-1/A FORM S-1/A 0001104659-24-077829 Jul 3, 2024
S-1/A AMENDMENT NO. 1 TO FORM S-1 0001571049-17-008599 Nov 27, 2017
S-1/A FORM S-1/A 0001144204-12-022352 Apr 18, 2012
S-1/A FORM S-1/A 0001144204-12-020541 Apr 6, 2012
S-1/A AMENDMENT TO FORM S-1 0001144204-12-013999 Mar 9, 2012
S-1/A AMENDMENT TO FORM S-1 0001144204-12-006386 Feb 7, 2012
S-1/A FORM S-1/A 0001144204-11-071934 Dec 28, 2011