Company · CIK 1434524 # ClearSign Technologies Corp | CIK | [1434524](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001434524) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 3823 — Industrial Instruments For Measurement, Display, and Control | | Incorporated in | DE | | Business address | OK | | Listed | CLIR (Nasdaq) | | First annual or quarterly report | 2012-06-11 | ## Offerings 11 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-288736 | Shelf Effective | 2025-07-17 | 2026-07-06 | 5 | | 333-289549 | Registered company Final prospectus | 2025-08-12 | 2025-08-22 | 4 | | 333-279550 | Registered company Final prospectus | 2024-05-20 | 2024-07-15 | 4 | | 333-265967 | Shelf Effective | 2022-07-01 | 2024-04-23 | 6 | | 333-273927 | Shelf Effective | 2023-08-11 | 2023-08-30 | 2 | | 333-232402 | Shelf Effective | 2019-06-27 | 2022-05-31 | 6 | | 333-227169 | Shelf Effective | 2018-08-31 | 2018-09-21 | 2 | | 333-208784 | Shelf Effective | 2015-12-29 | 2018-02-26 | 4 | | 333-221467 | Registered company Withdrawn | 2017-11-09 | 2017-12-06 | 3 | | 333-188381 | Shelf Effective | 2013-05-06 | 2015-02-05 | 4 | | 333-177946 | IPO Final prospectus | 2011-11-14 | 2012-04-25 | 9 | ## Filings 49 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-07-06 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465926080740/0001104659-26-080740-index.htm) Shelf takedown | 333-288736 | 0001104659-26-080740 | | 2026-06-01 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465926068611/0001104659-26-068611-index.htm) Shelf takedown | 333-288736 | 0001104659-26-068611 | | 2026-05-28 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465926067545/0001104659-26-067545-index.htm) Shelf takedown | 333-288736 | 0001104659-26-067545 | | 2025-08-22 | [424B4](https://www.sec.gov/Archives/edgar/data/1434524/000110465925081941/0001104659-25-081941-index.htm) Final prospectus | 333-289549 | 0001104659-25-081941 | | 2025-08-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999525002705/9999999995-25-002705-index.htm) Declared effective | 333-289549 | 9999999995-25-002705 | | 2025-08-20 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000110465925080929/0001104659-25-080929-index.htm) Amendment | 333-289549 | 0001104659-25-080929 | | 2025-08-12 | [S-1](https://www.sec.gov/Archives/edgar/data/1434524/000110465925076944/0001104659-25-076944-index.htm) Registration filed | 333-289549 | 0001104659-25-076944 | | 2025-07-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999525002374/9999999995-25-002374-index.htm) Declared effective | 333-288736 | 9999999995-25-002374 | | 2025-07-17 | [S-3](https://www.sec.gov/Archives/edgar/data/1434524/000110465925068740/0001104659-25-068740-index.htm) Shelf registered | 333-288736 | 0001104659-25-068740 | | 2024-07-15 | [424B4](https://www.sec.gov/Archives/edgar/data/1434524/000110465924079684/0001104659-24-079684-index.htm) Final prospectus | 333-279550 | 0001104659-24-079684 | | 2024-07-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999524002149/9999999995-24-002149-index.htm) Declared effective | 333-279550 | 9999999995-24-002149 | | 2024-07-03 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000110465924077829/0001104659-24-077829-index.htm) Amendment | 333-279550 | 0001104659-24-077829 | | 2024-05-20 | [S-1](https://www.sec.gov/Archives/edgar/data/1434524/000110465924063437/0001104659-24-063437-index.htm) Registration filed | 333-279550 | 0001104659-24-063437 | | 2024-04-23 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465924050203/0001104659-24-050203-index.htm) Shelf takedown | 333-265967 | 0001104659-24-050203 | | 2024-04-19 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465924049009/0001104659-24-049009-index.htm) Shelf takedown | 333-265967 | 0001104659-24-049009 | | 2024-03-18 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465924035176/0001104659-24-035176-index.htm) Shelf takedown | 333-265967 | 0001104659-24-035176 | | 2024-03-18 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465924035154/0001104659-24-035154-index.htm) Shelf takedown | 333-265967 | 0001104659-24-035154 | | 2023-08-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999523002534/9999999995-23-002534-index.htm) Declared effective | 333-273927 | 9999999995-23-002534 | | 2023-08-11 | [S-3](https://www.sec.gov/Archives/edgar/data/1434524/000110465923090472/0001104659-23-090472-index.htm) Shelf registered | 333-273927 | 0001104659-23-090472 | | 2022-08-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999522002362/9999999995-22-002362-index.htm) Declared effective | 333-265967 | 9999999995-22-002362 | | 2022-07-01 | [S-3](https://www.sec.gov/Archives/edgar/data/1434524/000155837022010504/0001558370-22-010504-index.htm) Shelf registered | 333-265967 | 0001558370-22-010504 | | 2022-05-31 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465922066605/0001104659-22-066605-index.htm) Shelf takedown | 333-232402 | 0001104659-22-066605 | | 2022-05-26 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465922065282/0001104659-22-065282-index.htm) Shelf takedown | 333-232402 | 0001104659-22-065282 | | 2022-04-14 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465922046098/0001104659-22-046098-index.htm) Shelf takedown | 333-232402 | 0001104659-22-046098 | | 2020-12-23 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000110465920139209/0001104659-20-139209-index.htm) Shelf takedown | 333-232402 | 0001104659-20-139209 | | 2019-07-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999519001583/9999999995-19-001583-index.htm) Declared effective | 333-232402 | 9999999995-19-001583 | | 2019-06-27 | [S-3](https://www.sec.gov/Archives/edgar/data/1434524/000114420419032759/0001144204-19-032759-index.htm) Shelf registered | 333-232402 | 0001144204-19-032759 | | 2018-09-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999518002434/9999999995-18-002434-index.htm) Declared effective | 333-227169 | 9999999995-18-002434 | | 2018-08-31 | [S-3](https://www.sec.gov/Archives/edgar/data/1434524/000114420418047612/0001144204-18-047612-index.htm) Shelf registered | 333-227169 | 0001144204-18-047612 | | 2018-02-26 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000114420418010843/0001144204-18-010843-index.htm) Shelf takedown | 333-208784 | 0001144204-18-010843 | | 2018-02-22 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000114420418010298/0001144204-18-010298-index.htm) Shelf takedown | 333-208784 | 0001144204-18-010298 | | 2017-12-06 | [RW](https://www.sec.gov/Archives/edgar/data/1434524/000157104917008647/0001571049-17-008647-index.htm) Withdrawn | 333-221467 | 0001571049-17-008647 | | 2017-11-27 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000157104917008599/0001571049-17-008599-index.htm) Amendment | 333-221467 | 0001571049-17-008599 | | 2017-11-09 | [S-1](https://www.sec.gov/Archives/edgar/data/1434524/000157104917008483/0001571049-17-008483-index.htm) Registration filed | 333-221467 | 0001571049-17-008483 | | 2016-01-07 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999516003485/9999999995-16-003485-index.htm) Declared effective | 333-208784 | 9999999995-16-003485 | | 2015-12-29 | [S-3](https://www.sec.gov/Archives/edgar/data/1434524/000114420415073133/0001144204-15-073133-index.htm) Shelf registered | 333-208784 | 0001144204-15-073133 | | 2015-02-05 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000114420415006098/0001144204-15-006098-index.htm) Shelf takedown | 333-188381 | 0001144204-15-006098 | | 2014-02-28 | [424B5](https://www.sec.gov/Archives/edgar/data/1434524/000114420414012583/0001144204-14-012583-index.htm) Shelf takedown | 333-188381 | 0001144204-14-012583 | | 2013-05-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999513001670/9999999995-13-001670-index.htm) Declared effective | 333-188381 | 9999999995-13-001670 | | 2013-05-06 | [S-3](https://www.sec.gov/Archives/edgar/data/1434524/000114420413026504/0001144204-13-026504-index.htm) Shelf registered | 333-188381 | 0001144204-13-026504 | | 2012-04-25 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999512001170/9999999995-12-001170-index.htm) Declared effective | 333-177946 | 9999999995-12-001170 | | 2012-04-25 | [424B1](https://www.sec.gov/Archives/edgar/data/1434524/000114420412023622/0001144204-12-023622-index.htm) Final prospectus | 333-177946 | 0001144204-12-023622 | | 2012-04-24 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1434524/999999999512001140/9999999995-12-001140-index.htm) Declared effective | 333-177946 | 9999999995-12-001140 | | 2012-04-18 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000114420412022352/0001144204-12-022352-index.htm) Amendment | 333-177946 | 0001144204-12-022352 | | 2012-04-06 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000114420412020541/0001144204-12-020541-index.htm) Amendment | 333-177946 | 0001144204-12-020541 | | 2012-03-09 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000114420412013999/0001144204-12-013999-index.htm) Amendment | 333-177946 | 0001144204-12-013999 | | 2012-02-07 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000114420412006386/0001144204-12-006386-index.htm) Amendment | 333-177946 | 0001144204-12-006386 | | 2011-12-28 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1434524/000114420411071934/0001144204-11-071934-index.htm) Amendment | 333-177946 | 0001144204-11-071934 | | 2011-11-14 | [S-1](https://www.sec.gov/Archives/edgar/data/1434524/000114420411064058/0001144204-11-064058-index.htm) Registration filed | 333-177946 | 0001144204-11-064058 | [All filings of this company](https://equitycapital.markets/filings?cik=1434524) · [CSV](https://equitycapital.markets/filings.csv?cik=1434524) --- Source page: https://equitycapital.markets/company/1434524 · Data: U.S. SEC EDGAR · CC BY 4.0