Birchtech Corp. SEC filings BCHT
Birchtech Corp. has 807 filings in SEC EDGAR's recent list, going back to Aug 9, 2001. Its latest annual report, Form ARS, was filed on Jun 24, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 13, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Jul 28, 2026 (change to shareholder rights, bylaw or fiscal year change, shareholder vote results). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| CERT | Nyse american certification | Feb 25, 2026 | — |
| EFFECT | Filing | Feb 17, 2026 | — |
| CORRESP | Letter to the SEC | Feb 12, 2026 | — |
| CORRESP | Letter to the SEC | Feb 12, 2026 | — |
| CORRESP | Letter to the SEC | Feb 12, 2026 | — |
| CORRESP | Letter to the SEC | Feb 12, 2026 | — |
| 8-A12B | Form 8-a12b | Feb 11, 2026 | — |
| CORRESP | Letter to the SEC | Feb 9, 2026 | — |
| CORRESP | Letter to the SEC | Feb 9, 2026 | — |
| DRS | Filing | Oct 23, 2025 | — |
| NT 10-K | Filing | Apr 1, 2024 | Dec 31, 2023 |
| NT 10-Q | Filing | Nov 14, 2023 | Sep 30, 2023 |
| NT 10-Q | Filing | Aug 14, 2023 | Jun 30, 2023 |
| NT 10-Q | Filing | May 15, 2023 | Mar 31, 2023 |
| NT 10-K | Filing | Mar 31, 2023 | Dec 31, 2022 |
| RW | Filing | Aug 24, 2022 | — |
| NT 10-Q | Filing | May 16, 2022 | Mar 31, 2022 |
| NT 10-K | Filing | Mar 31, 2022 | Dec 31, 2021 |
| NT 10-K | Filing | Mar 31, 2021 | Dec 31, 2020 |
| NT 10-Q | Filing | Nov 16, 2020 | Sep 30, 2020 |
| NT 10-Q | Filing | Aug 14, 2020 | Jun 30, 2020 |
| NT 10-Q | Filing | Jun 29, 2020 | Mar 31, 2020 |
| NT 10-K | Filing | Mar 30, 2020 | Dec 31, 2019 |
| D/A | Filing | Aug 21, 2019 | — |
| D | Filing | Jun 28, 2019 | — |
| NT 10-K | Filing | Apr 1, 2019 | Dec 31, 2018 |
| D | Filing | Jun 28, 2018 | — |
| NT 10-Q | Filing | May 14, 2018 | Mar 31, 2018 |
| NT 10-K | Filing | Apr 2, 2018 | Dec 31, 2017 |
| NT 10-Q | Filing | Nov 14, 2017 | Sep 30, 2017 |
| NT 10-Q | Filing | Aug 14, 2017 | Jun 30, 2017 |
| EFFECT | Filing | Jan 10, 2017 | — |
| CORRESP | Letter to the SEC | Jan 6, 2017 | — |
| UPLOAD | Letter from the SEC | Jan 6, 2017 | — |
| D | Filing | Nov 22, 2016 | — |
| NT 10-Q | Filing | Nov 15, 2016 | Sep 30, 2016 |
| UPLOAD | Letter from the SEC | Nov 20, 2015 | — |
| CORRESP | Letter to the SEC | Nov 6, 2015 | — |
| UPLOAD | Letter from the SEC | Nov 2, 2015 | — |
| D | Filing | Aug 27, 2014 | — |
| D/A | Filing | May 16, 2014 | — |
| D | Filing | May 5, 2014 | — |
| D | Filing | May 2, 2014 | — |
| D/A | Filing | Sep 13, 2013 | — |
| D | Filing | Aug 12, 2013 | — |
| D | Filing | Apr 9, 2013 | — |
| UPLOAD | Letter from the SEC | Dec 27, 2012 | — |
| CORRESP | Letter to the SEC | Dec 21, 2012 | — |
| UPLOAD | Letter from the SEC | Dec 14, 2012 | — |
| D | Filing | May 2, 2012 | — |
| NT 10-K | Form nt 10-k | Mar 29, 2012 | Dec 31, 2011 |
| UPLOAD | Letter from the SEC | Feb 16, 2012 | — |
| CORRESP | Letter to the SEC | Feb 8, 2012 | — |
| UPLOAD | Letter from the SEC | Feb 3, 2012 | — |
| CORRESP | Letter to the SEC | Jan 20, 2012 | — |
| D | Filing | Jan 5, 2012 | — |
| UPLOAD | Letter from the SEC | Nov 30, 2011 | — |
| CORRESP | Letter to the SEC | Nov 18, 2011 | — |
| NT 10-Q | Form nt 10-q | Nov 14, 2011 | Sep 30, 2011 |
| UPLOAD | Letter from the SEC | Oct 18, 2011 | — |
| D | Filing | Oct 6, 2011 | — |
| CORRESP | Letter to the SEC | Oct 5, 2011 | — |
| D | Filing | Sep 28, 2011 | — |
| UPLOAD | Letter from the SEC | Sep 12, 2011 | — |
| NT 10-Q | Form nt 10-q | Aug 15, 2011 | Jun 30, 2011 |
| UPLOAD | Letter from the SEC | Jul 20, 2011 | — |
| NT 10-Q | Form nt10-q | May 16, 2011 | Mar 31, 2011 |
| NT 10-K | Form nt10-k | Mar 31, 2011 | Dec 31, 2010 |
| NT 10-Q | Filing | Nov 15, 2010 | Sep 30, 2010 |
| NT 10-Q | Filing | Aug 16, 2010 | Jun 30, 2010 |
| NT 10-Q | Filing | May 17, 2010 | Mar 31, 2010 |
| NT 10-K | Filing | Mar 31, 2010 | Dec 31, 2009 |
| NT 10-K | Filing | Mar 31, 2009 | Dec 31, 2008 |
| UPLOAD | Letter from the SEC | Mar 20, 2009 | — |
| UPLOAD | Letter from the SEC | Mar 18, 2009 | — |
| UPLOAD | Letter from the SEC | Mar 18, 2009 | — |
| UPLOAD | Letter from the SEC | Mar 18, 2009 | — |
| UPLOAD | Letter from the SEC | Mar 18, 2009 | — |
| CORRESP | Letter to the SEC | Mar 10, 2009 | — |
| CORRESP | Letter to the SEC | Feb 4, 2009 | — |
| CORRESP | Letter to the SEC | Jan 9, 2009 | — |
| CORRESP | Letter to the SEC | Dec 30, 2008 | — |
| CORRESP | Letter to the SEC | Nov 26, 2008 | — |
| NT 10-Q | Filing | Nov 14, 2008 | Sep 30, 2008 |
| CORRESP | Letter to the SEC | Nov 14, 2008 | — |
| NT 10-Q | Filing | Aug 14, 2008 | Jun 30, 2008 |
| NT 10-Q | Filing | May 15, 2008 | Mar 31, 2008 |
| 10KSB | 10-ksb | Apr 16, 2008 | Dec 31, 2007 |
| REGDEX | Auto-generated paper document | Apr 4, 2008 | — |
| NT 10-K | Filing | Mar 31, 2008 | Mar 31, 2008 |
| UPLOAD | Letter from the SEC | Mar 14, 2008 | — |
| 10QSB | Filing | Nov 19, 2007 | Sep 30, 2007 |
| NT 10-Q | Filing | Nov 14, 2007 | Sep 30, 2007 |
| 10QSB | Filing | Aug 17, 2007 | Jun 30, 2007 |
| NT 10-Q | Filing | Aug 14, 2007 | Jun 30, 2007 |
| 10QSB | Filing | May 21, 2007 | Mar 31, 2007 |
| REGDEX | Auto-generated paper document | May 18, 2007 | — |
| NT 10-Q | Filing | May 15, 2007 | Mar 31, 2007 |
| 10KSB | Filing | Apr 17, 2007 | Dec 31, 2006 |
| NT 10-K | Filing | Apr 2, 2007 | Dec 31, 2006 |
| UPLOAD | Letter from the SEC | Mar 13, 2007 | — |
| 10KSB/A | Filing | Feb 23, 2007 | Dec 31, 2005 |
| UPLOAD | Letter from the SEC | Feb 13, 2007 | — |
| 10QSB | Filing | Dec 13, 2006 | Sep 30, 2006 |
| UPLOAD | Letter from the SEC | Sep 18, 2006 | — |
| 10QSB | Filing | Aug 21, 2006 | Jun 30, 2006 |
| NT 10-Q | Filing | Aug 15, 2006 | Jun 30, 2006 |
| 10QSB | Filing | May 15, 2006 | Mar 31, 2006 |
| 10KSB | Filing | Apr 6, 2006 | Dec 31, 2005 |
| NT 10-K | Filing | Apr 3, 2006 | Dec 31, 2005 |
| SC 14F1 | Filing | Mar 14, 2006 | — |
| 10QSB | Filing | Nov 14, 2005 | Sep 30, 2005 |
| 10KSB | Filing | Sep 28, 2005 | Jun 30, 2005 |
| SC 14F1 | Filing | Jul 1, 2005 | — |
| 10QSB | Digicorp 3rd fiscal quarter | May 10, 2005 | Mar 31, 2005 |
| 10QSB | Digicorp 10qsb 2nd fiscal quarter 2005 | Feb 10, 2005 | Dec 31, 2004 |
| 10QSB | Digicorp 10qsb for period ending 9-30-04 | Nov 8, 2004 | Sep 30, 2004 |
| 10KSB | Digicorp 10ksb for fiscal year ending 6-30-2004 | Sep 27, 2004 | Jun 30, 2004 |
| 10QSB | Digicorp 10qsb period ending 3-31-04 | May 13, 2004 | Mar 31, 2004 |
| 10QSB | Digicorp 2nd fiscal quarter 12-31-03 | Feb 17, 2004 | Dec 31, 2003 |
| 10QSB | Digicorp 1st qtr fiscal 2004 (9-30-2003) | Nov 4, 2003 | Sep 30, 2003 |
| 10KSB | Digicorp 10ksb fiscal 2003 | Sep 17, 2003 | Jun 30, 2003 |
| 10QSB | 10qsb digicorp 3rd quarter fiscal 2003 | May 14, 2003 | Mar 31, 2003 |
| 10QSB | Digicorp 10qsb 2nd qtr fiscal 2003 | Feb 13, 2003 | Dec 31, 2002 |
| 10QSB | Digicorp 1st quarter fiscal 2002 | Nov 4, 2002 | Sep 30, 2002 |
| 10KSB | Digicorp 10-ksb for fiscal 2002 | Sep 12, 2002 | Jun 30, 2002 |
| 10QSB | Digicorp 3rd quarter 2002 10qsb | May 14, 2002 | Mar 31, 2002 |
| 10QSB | Digicorp 10qsb 6 month statement | Feb 13, 2002 | Dec 31, 2001 |
| 10QSB | Digicorp first quarter report | Nov 8, 2001 | Sep 30, 2001 |
| 10SB12G | Form 10-sb | Aug 9, 2001 | — |
Showing 130 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Measuring & Controlling Devices, NEC (SIC 3829)
- Listed as
- BCHT (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Corsicana, TX
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 728385
- Former names
- Midwest Energy Emissions Corp. (until Aug 12, 2024); China Youth Media, Inc. (until Oct 6, 2011); DIGICORP, INC. (until Sep 25, 2008); DIGICORP (until Mar 31, 2008)
Other Measuring & Controlling Devices, NEC companies
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- Onto Innovation Inc. ONTO
- Mirion Technologies, Inc. MIR
- Quantum-Si Inc QSI
- Owlet, Inc. OWLT
- Geospace Technologies Corp GEOS
Source: SEC EDGAR filings. This is company-reported data, not investment advice.