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.
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 | — |