ClearSign designs, develops and markets technologies that aim to improve the key performance characteristics of combustion systems, including emission, operational performance, energy efficiency and overall cost effectiveness.
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| Form | Description | Date | Format |
|---|---|---|---|
| DEFA14A | Additional proxy soliciting materials - definitive | Nov 13, 2018 |     |
| PREN14A | Non-management preliminary proxy statements not involving contested solicitations | Nov 9, 2018 | |
| 8-K | Report of unscheduled material events or corporate event | Nov 8, 2018 | |
| S-8 | Securities offered to employees pursuant to employee benefit plans | Nov 8, 2018 | |
| 10-Q | Quarterly report which provides a continuing view of a company's financial position | Nov 8, 2018 |   |
| 8-K | Report of unscheduled material events or corporate event | Oct 9, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Oct 2, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Oct 2, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Oct 2, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Oct 2, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Oct 2, 2018 | |
| 8-K | Report of unscheduled material events or corporate event | Oct 1, 2018 | |
| 424B3 | Form of prospectus reflecting facts events constituting substantive change from last form | Sep 24, 2018 | |
| EFFECT | Notice from the SEC of registration effectiveness | Sep 21, 2018 | |
| S-3 | Simplified registration form | Aug 31, 2018 | |
| 3 | Initial filing by director officer or owner of more than ten percent. | Aug 31, 2018 | |
| 8-K | Report of unscheduled material events or corporate event | Aug 29, 2018 | |
| 8-K | Report of unscheduled material events or corporate event | Aug 13, 2018 | |
| 10-Q | Quarterly report which provides a continuing view of a company's financial position | Aug 13, 2018 | |
| 3 | Initial filing by director officer or owner of more than ten percent. | Aug 6, 2018 | |
| 3 | Initial filing by director officer or owner of more than ten percent. | Jul 30, 2018 | |
| 3 | Initial filing by director officer or owner of more than ten percent. | Jul 30, 2018 | |
| SC 13D | Filing by person(s) reporting owned shares of common stock in a public company >5% | Jul 30, 2018 | |
| D | Official notice of an offering of securities that is made without registration under the Securities Act in reliance on an exemption provided by Regulation D and Section 4(6) under the Act | Jul 23, 2018 | |
| 8-K | Report of unscheduled material events or corporate event | Jul 20, 2018 | |
| 1-25 26-50 51-52 | |||