Birchtech Corp.

Q: Jun 30 2026

Q: Mar 31 2026

FY: Dec 31 2025

Q: Sep 30 2025

Q: Jun 30 2025

Q: Mar 31 2025

FY: Dec 31 2024

Q: Sep 30 2024

Q: Jun 30 2024

Q: Mar 31 2024

FY: Dec 31 2023

FY: Dec 31 2023

Q: Sep 30 2023

Q: Sep 30 2023

Q: Jun 30 2023

Q: Jun 30 2023

Q: Mar 31 2023

Q: Mar 31 2023

FY: Dec 31 2022

Q: Mar 31 2023

Material Modifications to Rights of Security Holders

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Shareholder Nominations Pursuant to Exchange Act Rule 14a-11

Other Events

Entry into a Material Definitive Agreement

Other Events

Material Modifications to Rights of Security Holders

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

5.03,8.01,9.01

Other Events

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

8.01,9.01

5.02,9.01

8.01,9.01

1.01,2.02,8.01

8.01,9.01

Prospectus Supplement with Pricing Information

Certification of approval for listing and registration on a national securities exchange

Notice of Effectiveness

Amended Initial Registration Statement

Registration of Securities on Exchange

Amended Initial Registration Statement

Registration (IPO) statement under Securities Act of 1933

Withdrawal of a registration statement

Registration (IPO) statement under Securities Act of 1933

06b

06b

06b

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration (IPO) statement under Securities Act of 1933

06b

<ITEMS>06b

<ITEMS>06b

<ITEMS>06b

<ITEMS>06b

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

No description available

Definitive Proxy Statement

No description available

Definitive Proxy Statement

LYTTON LAURENCE W

Mioska Michael David

MacPherson Richard

Kaye David M

Pavlish John

MacPherson Richard

Pavlish John

MacPherson Richard

Coogler Mitzi H

Coogler Mitzi H

Pavlish John

MacPherson Richard

none

Fitzmaurice Fiona

MacPherson Richard

Grant Troy J

Greenberg Christopher

Pavlish John

Trettel James

Kaye David M

Annual Report Scanned (Paper)

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Draft registration statement (confidential submission)

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC