# Birchtech Corp.: filings

BCHT · NYSE · CIK 728385 · [Technology](/sectors/technology.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/bcht.md) · [Financials](/companies/bcht/financials.md) · [Filings](/companies/bcht/filings.md) · [Insiders](/companies/bcht/insiders.md)

## Reports and events: 248 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 251, 8-K 133, 10-Q 53, 3 21, 10-K 18, NT 10-Q 17, CORRESP 16, UPLOAD 16, D 12, SC 13D/A 12, NT 10-K 11, DEF 14A 10, 10-Q/A 6, 4/A 5, 8-K/A 5, ARS 5, PRE 14A 5, 10-K/A 4, D/A 3, S-1 3, SC 13G/A 3, DEFA14A 2, EFFECT 2, S-1/A 2, SC 13D 2, SC 13G 2, 3/A 1, 424B3 1, 424B4 1, 8-A12B 1, CERT 1, DEF 14C 1, DRS 1, PRE 14C 1, RW 1, SCHEDULE 13G 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-08-13 | 20:16 ET | [10-Q](/filings/0001477932-26-004988.md) | Quarterly report, period 2026-06-30 | 0001477932-26-004988 |
| 2026-07-28 | 20:30 ET | [8-K](/filings/0001477932-26-004563.md) | 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 |
| 2026-06-24 | 11:30 ET | [DEF 14A](/filings/0001477932-26-003963.md) | Proxy statement, period 2026-07-23 | 0001477932-26-003963 |
| 2026-05-13 | 20:16 ET | [10-Q](/filings/0001477932-26-003054.md) | Quarterly report, period 2026-03-31 | 0001477932-26-003054 |
| 2026-05-12 | 20:16 ET | [8-K/A](/filings/0001477932-26-002995.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-26-002995 |
| 2026-05-06 | 20:15 ET | [8-K](/filings/0001477932-26-002802.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-26-002802 |
| 2026-04-13 | 20:15 ET | [8-K](/filings/0001477932-26-002165.md) | 5.08 Item not in the standard list; 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-26-002165 |
| 2026-03-31 | 20:15 ET | [10-K](/filings/0001477932-26-001835.md) | Annual report, period 2025-12-31 | 0001477932-26-001835 |
| 2026-03-17 | 20:05 ET | [8-K](/filings/0001104659-26-029450.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-029450 |
| 2026-02-27 | 21:01 ET | [8-K](/filings/0001104659-26-021534.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-021534 |
| 2026-02-12 | 18:27 ET | [S-1/A](/filings/0001104659-26-014131.md) | Registration statement, amended | 0001104659-26-014131 |
| 2026-02-03 | 22:11 ET | [S-1/A](/filings/0001104659-26-009808.md) | Registration statement, amended | 0001104659-26-009808 |
| 2026-01-13 | 21:57 ET | [S-1](/filings/0001104659-26-003397.md) | Registration statement | 0001104659-26-003397 |
| 2026-01-05 | 21:37 ET | [8-K](/filings/0001477932-26-000031.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-26-000031 |
| 2025-12-29 | 21:30 ET | [8-K](/filings/0001477932-25-009214.md) | 3.03 Change to security holders’ rights; 5.03 Amendment to articles or bylaws; 9.01 Financial statements and exhibits | 0001477932-25-009214 |
| 2025-11-13 | 21:16 ET | [10-Q](/filings/0001477932-25-008185.md) | Quarterly report, period 2025-09-30 | 0001477932-25-008185 |
| 2025-08-14 | 20:17 ET | [10-Q](/filings/0001477932-25-005905.md) | Quarterly report, period 2025-06-30 | 0001477932-25-005905 |
| 2025-06-20 | 20:30 ET | [8-K](/filings/0001477932-25-004727.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-25-004727 |
| 2025-05-15 | 20:15 ET | [10-Q](/filings/0001477932-25-003808.md) | Quarterly report, period 2025-03-31 | 0001477932-25-003808 |
| 2025-03-31 | 20:25 ET | [10-K](/filings/0001477932-25-002237.md) | Annual report, period 2024-12-31 | 0001477932-25-002237 |
| 2025-03-31 | 20:20 ET | [8-K](/filings/0001477932-25-002233.md) | 4.02 Non-reliance on financial statements; 9.01 Financial statements and exhibits | 0001477932-25-002233 |
| 2025-03-04 | 17:07 ET | [8-K](/filings/0001477932-25-001435.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001477932-25-001435 |
| 2025-01-06 | 14:51 ET | [8-K](/filings/0001477932-25-000056.md) | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001477932-25-000056 |
| 2024-11-27 | 11:00 ET | [DEF 14A](/filings/0001477932-24-007662.md) | Proxy statement, period 2024-11-27 | 0001477932-24-007662 |
| 2024-11-15 | 13:00 ET | [8-K](/filings/0001477932-24-007251.md) | 5.03 Amendment to articles or bylaws; 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-007251 |
| 2024-11-14 | 11:03 ET | [10-Q](/filings/0001477932-24-007130.md) | Quarterly report, period 2024-09-30 | 0001477932-24-007130 |
| 2024-10-21 | 12:30 ET | [8-K](/filings/0001477932-24-006589.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-006589 |
| 2024-10-17 | 12:30 ET | [8-K](/filings/0001477932-24-006503.md) | 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 |
| 2024-08-12 | 20:30 ET | [10-Q](/filings/0001477932-24-004672.md) | Quarterly report, period 2024-06-30 | 0001477932-24-004672 |
| 2024-08-01 | 17:00 ET | [8-K](/filings/0001477932-24-004495.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-004495 |
| 2024-06-13 | 20:30 ET | [8-K](/filings/0001477932-24-003675.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-24-003675 |
| 2024-05-15 | 20:56 ET | [10-Q](/filings/0001477932-24-003003.md) | Quarterly report, period 2024-03-31 | 0001477932-24-003003 |
| 2024-04-16 | 20:36 ET | [10-K](/filings/0001477932-24-002170.md) | Annual report, period 2023-12-31 | 0001477932-24-002170 |
| 2024-03-13 | 22:30 ET | [SC 13D/A](/filings/0001493152-24-009861.md) | Ownership report, active investor, amended | 0001493152-24-009861 |
| 2024-03-05 | 22:00 ET | [8-K](/filings/0001477932-24-001039.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-001039 |
| 2024-03-04 | 22:19 ET | [8-K](/filings/0001477932-24-001001.md) | 1.01 Entry into a material agreement; 2.02 Results of operations; 8.01 Other events | 0001477932-24-001001 |
| 2024-01-04 | 22:00 ET | [8-K](/filings/0001477932-24-000045.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-24-000045 |
| 2023-12-07 | 21:00 ET | [8-K](/filings/0001477932-23-009019.md) | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001477932-23-009019 |
| 2023-11-20 | 22:00 ET | [10-Q](/filings/0001477932-23-008706.md) | Quarterly report, period 2023-09-30 | 0001477932-23-008706 |
| 2023-11-14 | 14:15 ET | [8-K](/filings/0001477932-23-008353.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-23-008353 |
| 2023-11-07 | 11:02 ET | [8-K](/filings/0001477932-23-008115.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-23-008115 |
| 2023-11-03 | 10:02 ET | [DEF 14A](/filings/0001477932-23-008062.md) | Proxy statement, period 2023-11-03 | 0001477932-23-008062 |
| 2023-10-16 | 21:00 ET | [8-K](/filings/0001477932-23-007675.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-23-007675 |
| 2023-09-15 | 14:19 ET | [8-K](/filings/0001477932-23-006911.md) | 5.08 Item not in the standard list; 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-23-006911 |
| 2023-09-14 | 15:01 ET | [8-K](/filings/0001477932-23-006876.md) | 4.01 Change of auditor; 9.01 Financial statements and exhibits | 0001477932-23-006876 |
| 2023-08-16 | 17:54 ET | [10-Q](/filings/0001477932-23-006218.md) | Quarterly report, period 2023-06-30 | 0001477932-23-006218 |
| 2023-07-10 | 15:01 ET | [8-K](/filings/0001477932-23-005146.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001477932-23-005146 |
| 2023-07-06 | 20:00 ET | [8-K](/filings/0001477932-23-005041.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001477932-23-005041 |
| 2023-06-07 | 20:50 ET | [10-Q/A](/filings/0001477932-23-004316.md) | Quarterly report, amended, period 2023-03-31 | 0001477932-23-004316 |
| 2023-06-06 | 21:15 ET | [10-Q](/filings/0001477932-23-004266.md) | Quarterly report, period 2023-03-31 | 0001477932-23-004266 |

Page 1 of 5. [Older](/companies/bcht/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 14:55 ET. No prices; not investment advice.