UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) June 13, 2025

BIRCHTECH CORP.

(Exact name of registrant as specified in its charter)

Commission file number000-33067

Delaware		87-0398271
(State or other jurisdiction of incorporation)		(I.R.S. Employer Identification No.)
1810 Jester Drive Corsicana, Texas		75109
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (614) 505-6115

Not applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: None.

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act (17 CFR 230.405) or Rule 12b-2 of the Exchange Act (17 CFR 240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On June 13, 2025, Christopher Greenberg submitted his resignation as a director and Chairman of the Board of Birchtech Corp. (the “Company”), effective July 1, 2025. He has been a director since June 2013 and Chairman of the Board since December 2014. Mr. Greenberg’s resignation is not the result of any disagreement with the Company on any matter relating to the Company’s operations, policies or procedures. He has resigned so that he can focus on the demands of his other business pursuits. The Board has determined not to fill such pending vacancy on the Board at this time.

Richard MacPherson, President, Chief Executive Officer and a director of the Company, has been appointed Chairman of the Board on an interim basis, to be effective July 1, 2025.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number		Description

104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Birchtech Corp.

Date: June 20, 2025	By:	/s/ Richard MacPherson
		Richard MacPherson President and Chief Executive Officer

Birchtech Corp. 8-K