Birchtech Corp. — fact timeline

James Trettel changed role as Executive Vice President of Operations at Birchtech Corp..

“in connection with his appointment, he ceased serving as Executive Vice President of Operations.”

James Trettel was appointed as Chief Operating Officer at Birchtech Corp..

“on May 1, 2026, the Company appointed James Trettel as its Chief Operating Officer, and in connection with his appointment, he ceased serving as Executive Vice President of Operations.”

Michael Mioska was appointed as Chief Financial Officer at Birchtech Corp..

“Effective May 1, 2026, the Company appointed Michael Mioska as its Chief Financial Officer.”

Fiona Fitzmaurice departed as Chief Financial Officer at Birchtech Corp..

“On May 1, 2026, Fiona Fitzmaurice ceased serving as Chief Financial Officer of Birchtech Corp.”

Birchtech Corp. entered into Underwriting Agreement with Lake Street Capital Markets, LLC, as representative of the several underwriters named therein valued at approximately $13.1 million (effective 2026-02-25).

“On February 25, 2026, Birchtech Corp. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Lake Street Capital Markets, LLC, as representative of the several underwriters named therein (collectively, the “Underwriters”), relating to the public offering of 6,250,000 shares (the “Shares”) of the Company’s common stock, par value $0.001 per share, at a purchase price per share of $2.40 (the “Offering Price”).”

Birchtech Corp. issued common stock.

“every five (5) shares of issued and outstanding common stock will be combined into one (1) share.”

Birchtech Corp.: Filed a certificate of amendment to effect a 1-for-5 reverse stock split of common stock (effective 2025-12-26).

“On December 23, 2025, Birchtech Corp. (the “Company”) filed a certificate of amendment to the Company’s Certificate of Incorporation (the “Certificate of Amendment”) with the Secretary of State of the State of Delaware to effect a 1-for-5 reverse stock split (the “Reverse Split”) of the Company’s issued and outstanding shares of its common stock, par value $0.001 per share, effective on December 26, 2025.”

Richard MacPherson was appointed as Chairman of the Board (interim) at Birchtech Corp..

“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.”

Christopher Greenberg resigned as Director and Chairman of the Board at Birchtech Corp..

“Christopher Greenberg submitted his resignation as a director and Chairman of the Board of Birchtech Corp. (the “Company”), effective July 1, 2025.”

Birchtech Corp. reported that prior financial statements should not be relied upon.

“concluded that the Company will need to restate its audited consolidated financial statements for the year ended December 31, 2023 and the interim unaudited consolidated financial statements for each quarterly period in 2023 and in 2024”

Birchtech Corp.: Amended bylaws to reflect corporate name change from Midwest Energy Emissions Corp. to Birchtech Corp (effective 2024-11-11).

“On November 11, 2024, the Board of Directors of the Company (the “Board”) approved a conforming amendment to the By-laws of the Company to reflect the Corporate Name Change.”

Birchtech Corp.: Changed corporate name from Midwest Energy Emissions Corp. to Birchtech Corp (effective 2024-10-17).

“Effective on October 17, 2024, Midwest Energy Emissions Corp. (the “Company”) changed its corporate name to “Birchtech Corp.” pursuant to a Certificate of Amendment to its Certificate of Incorporation filed with the State of Delaware (the “Corporate Name Change”).”

Birchtech Corp. terminated Satisfaction and Discharge of Secured Debt with AC Midwest Energy LLC (effective 2024-02-27).

“As a result of the repayment of the remaining principal balance under the Secured Debt, the Company, MES and AC Midwest executed a Satisfaction and Discharge of Secured Debt confirming the cancellation of the Secured Note and that all of the obligations under the Restated Financing Agreement have been fully satisfied and discharged.”

Birchtech Corp. entered into Unsecured Debt Restructuring Agreement with AC Midwest Energy LLC valued at $4,114,930.60 (effective 2024-02-27).

“On February 27, 2024, Midwest Energy Emissions Corp. (the “Company”), along with its wholly-owned subsidiary, MES, Inc. (“MES”), entered into an Unsecured Debt Restructuring Agreement (the “Debt Restructuring Agreement”) with AC Midwest Energy LLC (“AC Midwest”) which replaces and supersedes the Unsecured Note Financing Agreement and Reaffirmation of Guaranty entered into with AC Midwest on February 25, 2019, as amended on October 28, 2022 (the “Unsecured Note Financing Agreement”).”

Birchtech Corp. shareholders approved Approval of Amended and Restated 2014 Equity Incentive Plan and Amended and Restated 2017 Equity Incentive Plan at the 2023-12-05 meeting.

“Proposal 4: The Company’s stockholders approved the Company’s Amended and Restated 2014 Equity Incentive Plan and the Company’s Amended and Restated 2017 Equity Incentive Plan, by the votes set forth in the table below: For Against Abstained Broker Non-Votes 48,367,529 1,129,492 424,701 20,798,344”

Birchtech Corp. shareholders approved Advisory vote on executive compensation at the 2023-12-05 meeting.

“Proposal 3: The Company’s stockholders approved, on an advisory non-binding basis, the compensation paid to the named executive officers, by the votes set forth in the table below: For Against Abstained Broker Non-Votes 48,346,706 1,118,505 456,511 20,798,344”

Birchtech Corp. shareholders approved Ratification of appointment of Rosenberg Rich Baker Berman, P.A. as independent registered public accounting firm for the year ending December 31, 2023 at the 2023-12-05 meeting.

“Proposal 2: The Company’s stockholders approved the ratification of the appointment of Rosenberg Rich Baker Berman, P.A. as the Company’s independent registered public accounting firm for the year ending December 31, 2023, by the votes set forth in the table below: For Against Abstained Broker Non-Votes 70,336,011 206,848 177,207 -”

Birchtech Corp. shareholders approved Election of four directors at the 2023-12-05 meeting.

“Proposal 1: The four nominees for election to the Board of Directors were elected to serve as directors of the Company until their successors are elected and qualified or the earlier of their resignation or removal, by the votes set forth in the table below: Nominees For Withheld Broker Non-Votes Richard MacPherson 49,587,282 334,440 20,798,344 Christopher Greenberg 48,997,679 924,043 20,798,344 David M. Kaye 49,119,054 802,668 20,798,344 Troy Grant 49,018,754 902,968 20,798,344”

Fiona Fitzmaurice was appointed as Chief Financial Officer at Birchtech Corp..

“On November 1, 2023, Midwest Energy Emissions Corp. (the “Company”) appointed Fiona Fitzmaurice as Chief Financial Officer of the Company, effective immediately.”

Greg Powell resigned as Chief Financial Officer at Birchtech Corp..

“On October 10, 2023, Greg Powell submitted his resignation as Chief Financial Officer of Midwest Energy Emissions Corp. (the “Company”) effective immediately.”

Birchtech Corp. engaged Rosenberg Rich Baker Berman, P.A. as its auditor.

“(the “Company”) approved the dismissal of Marcum LLP (“Marcum”) as the Company’s independent registered public accounting firm effective immediately and the engagement of Rosenberg Rich Baker Berman, P.A. (“RRBB P.A.”) as its new independent registered public accounting firm as of and for the year ended December 31, 2023. As previously reported, Marcum was engaged as the Company’s independent registered accounting firm on August 3, 2022.”

Birchtech Corp. dismissed Marcum LLP as its auditor.

“(the “Company”) approved the dismissal of Marcum LLP (“Marcum”) as the Company’s independent registered public accounting firm effective immediately and the engagement of Rosenberg Rich Baker Berman, P.A. (“RRBB P.A.”) as its new independent registered public accounting firm as of and for the year ended December 31, 2023. As previously reported, Marcum was engaged as the Company’s independent registered accounting firm on August 3, 2022. As described below, the change in independent registered public accounting firm is not the result of any disagreement with Marcum. Marcum reported on the Company’s financial statements for the fiscal year ended December 31, 2022. Marcum’s audit report on the financial statements for the fiscal year ended December 31, 2022 did not provide an adverse opinion or a disclaimer of opinion to the Company’s financial statements, nor modify its opinion as to unc”

Troy Grant was appointed as Director at Birchtech Corp..

“On May 26, 2023, the Board of Directors of Midwest Energy Emissions Corp. (the “Company”) approved the increase in the size of the Board from three to four members and appointed Troy Grant to the Board effective immediately.”

Birchtech Corp. reported the fourth quarter and full year 2022 results: revenue $5.7M for Q4 2022, $21.6M for FY22.

“On April 17, 2023, Midwest Energy Emissions Corp. (the “Company”) issued a press release announcing certain unaudited financial results and other financial information of the Company for the fourth quarter and full year 2022.”

Greg Powell was appointed as Chief Financial Officer at Birchtech Corp..

“On February 10, 2023, Midwest Energy Emissions Corp. (the “Company”) appointed Greg Powell as Chief Financial Officer of the Company, effective March 1, 2023.”

Birchtech Corp. entered into Dakin Agreement with Dakin Holdings Ltd. (effective 2023-01-01).

“On January 31, 2023, Midwest Energy Emissions Corp., along with its wholly-owned subsidiary, MES, Inc. (together, the “Company”), entered into a License and Supply Agreement with Dakin Holdings Ltd., a company incorporated in Barbados (“Dakin”), effective as of January 1, 2023 (the “Dakin Agreement”)”

Birchtech Corp. reported the full year ended December 31, 2022 results: revenue $21.6 Million.

“The unaudited revenues are expected to exceed our earlier projected revenue guidance for 2022 and should show revenue of $21.6 Million for the year-ended December 31, 2022.”

Jami L. Satterthwaite resigned as Chief Financial Officer at Birchtech Corp..

“On December 1, 2022, Jami L. Satterthwaite submitted her resignation as Chief Financial Officer of Midwest Energy Emissions Corp. (the “Company”), to be effective as of December 30, 2022.”

Birchtech Corp. terminated Termination Agreement with AC Midwest Energy LLC (effective 2022-10-28).

“The Company, MES and AC Midwest entered into a Termination Agreement (the “Termination Agreement”) on October 28, 2022 related to the Debt Repayment Agreement and Exchange Agreement entered into on June 1, 2021”

Birchtech Corp. entered into Repurchase Option Agreement with AC Midwest Energy LLC (effective 2022-10-28).

“entered into a Repurchase Option Agreement pursuant to which the Company shall have the option to repurchase a portion of the shares of common stock of the Company owned by AC Midwest at a purchase price of $0.50 per share”

Birchtech Corp. amended Amendment No. 4 to Amended and Restated Financing Agreement and Reaffirmation of Guaranty with AC Midwest Energy LLC (effective 2022-10-28).

“entered into Amendment No. 4 to Amended and Restated Financing Agreement and Reaffirmation of Guaranty (“Amendment No. 4”) with AC Midwest which extended the maturity date of the Secured Note from October 31, 2022 to August 25, 2025”

Birchtech Corp. amended Amendment No. 1 to the Unsecured Note Financing Agreement and Reaffirmation of Guaranty with AC Midwest Energy LLC (effective 2022-10-28).

“entered into Amendment No. 1 to the Unsecured Note Financing Agreement and Reaffirmation of Guaranty (“Amendment No. 1”) with AC Midwest Energy LLC (“AC Midwest”) which amended certain provisions of the Unsecured Note Financing Agreement and Reaffirmation of Guaranty entered into with AC Midwest on February 25, 2019”