ClearSign Technologies Corporation (CLIR)
Nasdaq: CLIR · Industrial Instruments For Measurement, Display, and Control · Tulsa, OK · filing with the SEC since 2008
Filings
314 filings since 2017 beside 231 insider forms · Non-accelerated filer and smaller reporting company · read from EDGAR on Nov 13, 2026Due nextNon-accelerated filer and smaller reporting company
10-Q
Quarterly report for the quarter ending Sep 30, 2026Non-accelerated filers and smaller reporting companies have 45 days after the quarter ends; quarter ends are taken to the month end.
by Nov 14, 2026
10-K
Annual report for the fiscal year ending Dec 31, 2026Non-accelerated filers and smaller reporting companies have 90 days after the fiscal year ends.
by Mar 31, 2027
A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 51 days after the quarter ended. The proxy statement was last filed Apr 28, 2026.
Filings a yearinsider forms included
5945444746775949
2026 counts to Nov 13, 2026.
Officer or director change (8-K item 5.02): 6 times in the last 36 months, the newest Aug 11, 2026.Listing warning from its exchange (8-K item 3.01): 6 times in the last 36 months, the newest Sep 30, 2025.SEC letters: 9 in the last 36 months, the newest Aug 20, 2025.
Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.
FiledFormWhat it is, in plain wordsPeriodAsk
Aug 20, 2026
8-K items 2.02, 7.01, 9.01
Results released; Investor disclosure (Regulation FD) · Current report
Aug 19, 2026
Aug 11, 2026
8-K items 5.02, 7.01, 9.01
Officer or director change; Investor disclosure (Regulation FD) · Current report
Aug 6, 2026
Jul 23, 2026
8-K items 1.01, 3.02, 7.01, 9.01
Major agreement signed; Shares sold without registration; Investor disclosure (Regulation FD) · Current report
Jul 21, 2026
Jun 1, 2026
8-K items 1.01, 8.01, 9.01
Major agreement signed; Other event · Current report
May 28, 2026
May 21, 2026
8-K items 2.02, 7.01, 9.01
Results released; Investor disclosure (Regulation FD) · Current report
May 20, 2026
Apr 10, 2026
8-K items 2.02, 7.01, 9.01
Results released; Investor disclosure (Regulation FD) · Current report
Apr 9, 2026
Mar 10, 2026
8-K items 3.03, 5.03, 7.01, 9.01
Change to shareholders' rights; Charter, bylaw or fiscal-year change; Investor disclosure (Regulation FD) · Current report
Mar 6, 2026
Feb 25, 2026
8-K items 2.02, 7.01, 9.01
Results released; Investor disclosure (Regulation FD) · Current report
Feb 24, 2026
Jan 7, 2026
8-K items 2.02, 7.01, 9.01
Results released; Investor disclosure (Regulation FD) · Current report
Nov 21, 2025
8-K items 2.02, 7.01, 9.01
Results released; Investor disclosure (Regulation FD) · Current report
Nov 19, 2025
Nov 17, 2025
8-K items 5.03, 8.01, 9.01
Charter, bylaw or fiscal-year change; Other event · Current report
Nov 11, 2025
40 of 314 shown
Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.