Birchtech Corp.
BCHTNYSECIK 728385TechnologyFiscal year ends Dec 31
Reports and events: 248 filings
Newest first, by EDGAR acceptance time (Eastern). Each filing’s page lists its documents on sec.gov and, for 10-K and 10-Q reports, the extracted sections.
What the forms are: 10-K, 10-Q, 8-K, Form 4, DEF 14A, Schedule 13D, Schedule 13G, amendments, accession numbers.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-08-1320:16 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0001477932-26-004988 |
| 2026-07-2820:30 ET | 8-K | 3.03 Change to security holders’ rights; 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001477932-26-004563 |
| 2026-06-2411:30 ET | DEF 14A | Proxy statementPeriod 2026-07-23 | 0001477932-26-003963 |
| 2026-05-1320:16 ET | 10-Q | Quarterly reportPeriod 2026-03-31 | 0001477932-26-003054 |
| 2026-05-1220:16 ET | 8-K/A | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-26-002995 |
| 2026-05-0620:15 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-26-002802 |
| 2026-04-1320:15 ET | 8-K | 5.08 Item not in the standard list; 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-26-002165 |
| 2026-03-3120:15 ET | 10-K | Annual reportPeriod 2025-12-31 | 0001477932-26-001835 |
| 2026-03-1720:05 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-029450 |
| 2026-02-2721:01 ET | 8-K | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-021534 |
| 2026-02-1218:27 ET | S-1/A | Registration statement, amended | 0001104659-26-014131 |
| 2026-02-0322:11 ET | S-1/A | Registration statement, amended | 0001104659-26-009808 |
| 2026-01-1321:57 ET | S-1 | Registration statement | 0001104659-26-003397 |
| 2026-01-0521:37 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-26-000031 |
| 2025-12-2921:30 ET | 8-K | 3.03 Change to security holders’ rights; 5.03 Amendment to articles or bylaws; 9.01 Financial statements and exhibits | 0001477932-25-009214 |
| 2025-11-1321:16 ET | 10-Q | Quarterly reportPeriod 2025-09-30 | 0001477932-25-008185 |
| 2025-08-1420:17 ET | 10-Q | Quarterly reportPeriod 2025-06-30 | 0001477932-25-005905 |
| 2025-06-2020:30 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-25-004727 |
| 2025-05-1520:15 ET | 10-Q | Quarterly reportPeriod 2025-03-31 | 0001477932-25-003808 |
| 2025-03-3120:25 ET | 10-K | Annual reportPeriod 2024-12-31 | 0001477932-25-002237 |
| 2025-03-3120:20 ET | 8-K | 4.02 Non-reliance on financial statements; 9.01 Financial statements and exhibits | 0001477932-25-002233 |
| 2025-03-0417:07 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001477932-25-001435 |
| 2025-01-0614:51 ET | 8-K | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001477932-25-000056 |
| 2024-11-2711:00 ET | DEF 14A | Proxy statementPeriod 2024-11-27 | 0001477932-24-007662 |
| 2024-11-1513:00 ET | 8-K | 5.03 Amendment to articles or bylaws; 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-007251 |
| 2024-11-1411:03 ET | 10-Q | Quarterly reportPeriod 2024-09-30 | 0001477932-24-007130 |
| 2024-10-2112:30 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-006589 |
| 2024-10-1712:30 ET | 8-K | 5.03 Amendment to articles or bylaws; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-006503 |
| 2024-08-1220:30 ET | 10-Q | Quarterly reportPeriod 2024-06-30 | 0001477932-24-004672 |
| 2024-08-0117:00 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-004495 |
| 2024-06-1320:30 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-24-003675 |
| 2024-05-1520:56 ET | 10-Q | Quarterly reportPeriod 2024-03-31 | 0001477932-24-003003 |
| 2024-04-1620:36 ET | 10-K | Annual reportPeriod 2023-12-31 | 0001477932-24-002170 |
| 2024-03-1322:30 ET | SC 13D/A | Ownership report, active investor, amended | 0001493152-24-009861 |
| 2024-03-0522:00 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-001039 |
| 2024-03-0422:19 ET | 8-K | 1.01 Entry into a material agreement; 2.02 Results of operations; 8.01 Other events | 0001477932-24-001001 |
| 2024-01-0422:00 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-000045 |
| 2023-12-0721:00 ET | 8-K | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001477932-23-009019 |
| 2023-11-2022:00 ET | 10-Q | Quarterly reportPeriod 2023-09-30 | 0001477932-23-008706 |
| 2023-11-1414:15 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-23-008353 |
| 2023-11-0711:02 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-23-008115 |
| 2023-11-0310:02 ET | DEF 14A | Proxy statementPeriod 2023-11-03 | 0001477932-23-008062 |
| 2023-10-1621:00 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-23-007675 |
| 2023-09-1514:19 ET | 8-K | 5.08 Item not in the standard list; 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-23-006911 |
| 2023-09-1415:01 ET | 8-K | 4.01 Change of auditor; 9.01 Financial statements and exhibits | 0001477932-23-006876 |
| 2023-08-1617:54 ET | 10-Q | Quarterly reportPeriod 2023-06-30 | 0001477932-23-006218 |
| 2023-07-1015:01 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-23-005146 |
| 2023-07-0620:00 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-23-005041 |
| 2023-06-0720:50 ET | 10-Q/A | Quarterly report, amendedPeriod 2023-03-31 | 0001477932-23-004316 |
| 2023-06-0621:15 ET | 10-Q | Quarterly reportPeriod 2023-03-31 | 0001477932-23-004266 |
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 14:55 ET. Listed shows no prices and gives no investment advice.