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Mailing Address 8023 E. 63RD PLACE, SUITE 101 TULSA OK 74133
Business Address 8023 E. 63RD PLACE, SUITE 101 TULSA OK 74133 (918) 236-6461
ClearSign Technologies Corp CIK#: 0001434524 (see all company filings)

SIC: 3823 - INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
State location: OK | State of Inc.: DE | Fiscal Year End: 1231
formerly: CLEARSIGN COMBUSTION CORP (filings through 2019-10-31)
(CF Office: 08 Industrial Applications and Services)
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Items 1 - 40  0001434524 Filings RSS Feed
Filings Format Description Filed/Effective File/Film Number
10-K/A  Documents   Interactive Data [Amend] Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0001104659-24-053028 (34 Act)  Size: 573 KB
2024-04-26 001-35521
24884683
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, 8.01, and 9.01
Acc-no: 0001104659-24-052066 (34 Act)  Size: 292 KB
2024-04-25 001-35521
24877495
8-K  Documents   Interactive Data Current report, items 5.02, 7.01, 8.01, and 9.01
Acc-no: 0001104659-24-050960 (34 Act)  Size: 285 KB
2024-04-24 001-35521
24866905
8-K  Documents   Interactive Data Current report, items 1.01, 3.02, and 9.01
Acc-no: 0001104659-24-050306 (34 Act)  Size: 389 KB
2024-04-23 001-35521
24862660
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0001104659-24-050203 (33 Act)  Size: 417 KB
2024-04-23 333-265967
24862596
8-K  Documents   Interactive Data Current report, items 1.01, 3.02, 7.01, and 9.01
Acc-no: 0001104659-24-049160 (34 Act)  Size: 1 MB
2024-04-19 001-35521
24855760
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0001104659-24-049009 (33 Act)  Size: 399 KB
2024-04-19 333-265967
24855522
S-8  Documents Securities to be offered to employees in employee benefit plans
Acc-no: 0001104659-24-041469 (33 Act)  Size: 85 KB
2024-04-01 333-278411
24805513
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0001558370-24-004441 (34 Act)  Size: 8 MB
2024-04-01 001-35521
24805505
FWP  Documents Filing under Securities Act Rules 163/433 of free writing prospectuses
Acc-no: 0001104659-24-035791 (34 Act)  Size: 4 MB
2024-03-19 333-265967
24760995
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0001104659-24-035176 (33 Act)  Size: 410 KB
2024-03-18 333-265967
24756833
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0001104659-24-035154 (33 Act)  Size: 14 KB
2024-03-18 333-265967
24756817
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, and 9.01
Acc-no: 0001104659-24-011404 (34 Act)  Size: 252 KB
2024-02-07 001-35521
24602332
SC 13D/A  Documents [Amend] General statement of acquisition of beneficial ownership
Acc-no: 0001014108-24-000006 (34 Act)  Size: 159 KB
2024-02-05 005-86820
24594603
8-K  Documents   Interactive Data Current report, items 1.01 and 9.01
Acc-no: 0001104659-24-001822 (34 Act)  Size: 199 KB
2024-01-05 001-35521
24516669
8-K  Documents   Interactive Data Current report, items 3.01 and 9.01
Acc-no: 0001104659-23-121296 (34 Act)  Size: 197 KB
2023-11-27 001-35521
231441136
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, and 9.01
Acc-no: 0001104659-23-118741 (34 Act)  Size: 308 KB
2023-11-15 001-35521
231411361
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001558370-23-019018 (34 Act)  Size: 5 MB
2023-11-14 001-35521
231406004
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0001104659-23-103180 (34 Act)  Size: 227 KB
2023-09-22 001-35521
231271739
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, and 9.01
Acc-no: 0001104659-23-097793 (34 Act)  Size: 410 KB
2023-09-01 001-35521
231232985
424B3  Documents Prospectus [Rule 424(b)(3)]
Acc-no: 0001104659-23-097773 (33 Act)  Size: 165 KB
2023-09-01 333-273927
231232740
EFFECT  Documents Notice of Effectiveness
Acc-no: 9999999995-23-002534 (33 Act)  Size: 1 KB
2023-08-30 16:30:00 333-273927
231226858
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0001104659-23-096559 (34 Act)  Size: 222 KB
2023-08-29 001-35521
231222084
8-A12B/A  Documents [Amend] Registration of securities [Section 12(b)]
Acc-no: 0001104659-23-091304 (34 Act)  Size: 16 KB
2023-08-14 001-35521
231169773
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001558370-23-014714 (34 Act)  Size: 10 MB
2023-08-14 001-35521
231166408
8-A12B/A  Documents [Amend] Registration of securities [Section 12(b)]
Acc-no: 0001104659-23-090608 (34 Act)  Size: 47 KB
2023-08-11 001-35521
231165204
S-3  Documents Registration statement under Securities Act of 1933
Acc-no: 0001104659-23-090472 (33 Act)  Size: 253 KB
2023-08-11 333-273927
231164152
8-K  Documents   Interactive Data Current report, items 1.01, 3.03, 5.03, 7.01, and 9.01
Acc-no: 0001104659-23-071426 (34 Act)  Size: 536 KB
2023-06-15 001-35521
231016054
8-K  Documents   Interactive Data Current report, items 5.07 and 9.01
Acc-no: 0001104659-23-069394 (34 Act)  Size: 212 KB
2023-06-08 001-35521
231002106
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0001104659-23-065626 (34 Act)  Size: 220 KB
2023-05-30 001-35521
23971286
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, and 9.01
Acc-no: 0001104659-23-063815 (34 Act)  Size: 300 KB
2023-05-24 001-35521
23950501
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001558370-23-009840 (34 Act)  Size: 4 MB
2023-05-15 001-35521
23922041
8-K  Documents   Interactive Data Current report, items 3.01 and 9.01
Acc-no: 0001104659-23-055099 (34 Act)  Size: 199 KB
2023-05-02 001-35521
23880539
ARS  Documents Annual Report to Security Holders
Acc-no: 0001558370-23-006688 (34 Act)  Size: 1 MB
2023-04-26 001-35521
23846050
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001558370-23-006670 (34 Act)  Size: 405 KB
2023-04-25 001-35521
23845555
DEF 14A  Documents Other definitive proxy statements
Acc-no: 0001558370-23-006668 (34 Act)  Size: 1 MB
2023-04-25 001-35521
23845537
PRE 14A  Documents Other preliminary proxy statements
Acc-no: 0001558370-23-005962 (34 Act)  Size: 1 MB
2023-04-14 001-35521
23821144
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, and 9.01
Acc-no: 0001104659-23-043159 (34 Act)  Size: 385 KB
2023-04-07 001-35521
23808966
S-8  Documents Securities to be offered to employees in employee benefit plans
Acc-no: 0001104659-23-040244 (33 Act)  Size: 86 KB
2023-03-31 333-271042
23788507
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0001558370-23-005285 (34 Act)  Size: 7 MB
2023-03-31 001-35521
23787580