Birchtech Corp. — All Filings
789 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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424B3
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UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 8-K | FORM 8-K | 0001104659-26-029450 | Mar 17, 2026 | — |
| 4 | PRIMARY DOCUMENT | 0001358094-26-000001 | Mar 2, 2026 | Feb 27, 2026 |
| 8-K | FORM 8-K | 0001104659-26-021534 | Feb 27, 2026 | Feb 25, 2026 |
| 424B4 | 424B4 | 0001104659-26-021168 | Feb 27, 2026 | — |
| CERT | NYSE AMERICAN CERTIFICATION | 0001143313-26-000011 | Feb 25, 2026 | — |
| EFFECT | — | 9999999995-26-000607 | Feb 17, 2026 | — |
| S-1/A | S-1/A | 0001104659-26-014131 | Feb 12, 2026 | — |
| 8-A12B | FORM 8-A12B | 0001104659-26-013041 | Feb 11, 2026 | — |
| S-1/A | S-1/A | 0001104659-26-009808 | Feb 3, 2026 | — |
| S-1 | S-1 | 0001104659-26-003397 | Jan 13, 2026 | — |
| 8-K | FORM 8-K | 0001477932-26-000031 | Jan 5, 2026 | Dec 29, 2025 |
| 8-K | FORM 8-K | 0001477932-25-009214 | Dec 29, 2025 | Dec 23, 2025 |
| 4 | PRIMARY DOCUMENT | 0001358094-25-000006 | Dec 15, 2025 | Dec 11, 2025 |
| 4 | PRIMARY DOCUMENT | 0001358094-25-000007 | Dec 15, 2025 | Dec 12, 2025 |
| 4 | PRIMARY DOCUMENT | 0001358094-25-000008 | Dec 15, 2025 | Dec 12, 2025 |
| 10-Q | FORM 10-Q | 0001477932-25-008185 | Nov 13, 2025 | Sep 30, 2025 |
| DRS | — | 0001104659-25-101822 | Oct 23, 2025 | — |
| 10-Q | FORM 10-Q | 0001477932-25-005905 | Aug 14, 2025 | Jun 30, 2025 |
| 4 | PRIMARY DOCUMENT | 0000945836-25-000004 | Jun 23, 2025 | Jun 20, 2025 |
| 4 | PRIMARY DOCUMENT | 0000945836-25-000003 | Jun 23, 2025 | Jun 20, 2025 |
| 8-K | FORM 8-K | 0001477932-25-004727 | Jun 20, 2025 | Jun 13, 2025 |
| 10-Q | FORM 10-Q | 0001477932-25-003808 | May 15, 2025 | Mar 31, 2025 |
| 10-K | FORM 10-K | 0001477932-25-002237 | Mar 31, 2025 | Dec 31, 2024 |
| 8-K | FORM 8-K | 0001477932-25-002233 | Mar 31, 2025 | Mar 28, 2025 |
| 8-K | FORM 8-K | 0001477932-25-001435 | Mar 4, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0000945836-25-000002 | Jan 13, 2025 | Jan 9, 2025 |
| 8-K | FORM 8-K | 0001477932-25-000056 | Jan 6, 2025 | Dec 30, 2024 |
| 3 | PRIMARY DOCUMENT | 0000945836-25-000001 | Jan 6, 2025 | Dec 30, 2024 |
| DEF 14A | DEF 14A | 0001477932-24-007662 | Nov 27, 2024 | — |
| ARS | ARS | 0001477932-24-007663 | Nov 27, 2024 | Dec 31, 2023 |
| 8-K | FORM 8-K | 0001477932-24-007251 | Nov 15, 2024 | Oct 29, 2024 |
| 10-Q | FORM 10-Q | 0001477932-24-007130 | Nov 14, 2024 | Sep 30, 2024 |
| PRE 14A | PRE 14A | 0001477932-24-007090 | Nov 13, 2024 | Dec 30, 2024 |
| 8-K | FORM 8-K | 0001477932-24-006589 | Oct 21, 2024 | Oct 8, 2024 |
| 8-K | FORM 8-K | 0001477932-24-006503 | Oct 17, 2024 | Oct 15, 2024 |
| 10-Q | FORM 10-Q | 0001477932-24-004672 | Aug 12, 2024 | Jun 30, 2024 |
| 8-K | FORM 8-K | 0001477932-24-004495 | Aug 1, 2024 | Jul 30, 2024 |
| 4 | PRIMARY DOCUMENT | 0000945836-24-000009 | Jun 26, 2024 | Jun 24, 2024 |
| 4 | PRIMARY DOCUMENT | 0000945836-24-000010 | Jun 26, 2024 | Jun 24, 2024 |
| 8-K | FORM 8-K | 0001477932-24-003675 | Jun 13, 2024 | Jun 7, 2024 |
| 10-Q | FORM 10-Q | 0001477932-24-003003 | May 15, 2024 | Mar 31, 2024 |
| 10-K | FORM 10-K | 0001477932-24-002170 | Apr 16, 2024 | Dec 31, 2023 |
| NT 10-K | NT 10-K | 0001477932-24-001716 | Apr 1, 2024 | Dec 31, 2023 |
| SC 13D/A | — | 0001493152-24-009861 | Mar 13, 2024 | — |
| 8-K | FORM 8-K | 0001477932-24-001039 | Mar 5, 2024 | Mar 4, 2024 |
| 8-K | FORM 8-K | 0001477932-24-001001 | Mar 4, 2024 | Feb 27, 2024 |
| 4 | PRIMARY DOCUMENT | 0000945836-24-000007 | Jan 16, 2024 | Jan 15, 2024 |
| 4 | PRIMARY DOCUMENT | 0000945836-24-000005 | Jan 16, 2024 | Jan 15, 2024 |
| 4 | PRIMARY DOCUMENT | 0000945836-24-000006 | Jan 16, 2024 | Jan 15, 2024 |
| 4 | PRIMARY DOCUMENT | 0000945836-24-000004 | Jan 16, 2024 | Jan 15, 2024 |