Company to Begin Repurchasing Common Stock Under Previously Authorized $5.0 Million Program

CORSICANA, Texas, Sept. 09, 2026 (GLOBE NEWSWIRE) -- Birchtech Corp. (NYSE:BCHT) (TSX:BCHT) ("Birchtech" or the "Company"), a leader in specialty activated carbon technologies for sustainable air and water treatment, today announced that it intends to commence purchases of its common stock under the $5.0 million share repurchase program authorized by its Board of Directors and announced on March 19, 2025.

Repurchases under the program may be made from time to time in open market transactions through the facilities of the NYSE American at prevailing market prices, subject to applicable legal and regulatory requirements, market conditions, share price, and other factors.

The Company expects that purchases may commence on or after September 14, 2026 and may continue until December 31, 2026, unless earlier completed, suspended or discontinued. The actual number of shares purchased, if any, and the timing and price of any purchases will depend on market conditions and other factors. The Company is not obligated to purchase any particular number of shares.

The purchases are intended to provide the Company with the flexibility to return capital to shareholders when management believes such purchases are appropriate. The Company intends to fund any purchases from available cash.

Management Commentary

Richard MacPherson, President and Chief Executive Officer of Birchtech, stated: "Commencing this program reflects the confidence of our Board and management team in the durability of our business and in the value we are building across both of our platforms. With our patent estate now secured, a substantial final judgment that we continue to pursue, and our water business moving from validation toward commercial deployment, we believe returning capital through the repurchase of our common stock at current market pricing may be a prudent use of the balance sheet alongside the investments we are making to scale. With $11.8 million of cash and no debt as of June 30, 2026, we have the capacity to do both, and we intend to act opportunistically and with discipline on behalf of my fellow shareholders."

About Birchtech Corp.

Birchtech Corp. (NYSE:BCHT) (TSX:BCHT) is a leader in specialty activated carbon technologies delivering innovative solutions for air and water purification to support a cleaner, more sustainable future. The Company provides patented SEA® sorbent technologies for mercury emissions capture for the coal-fired utility sector and SEA disruptive water purification technologies with a specialization on removing contaminants, including ‘forever chemicals’ such as PFAS, from potable water and industrial wastewater. Backed by a strong intellectual property portfolio and a team of activated carbon experts, Birchtech provides cleaner air to North American communities and is applying this expertise to a novel approach in water purification. To learn more, please visit www.birchtech.com.

Safe Harbor Statement

With the exception of historical information contained in this press release, content herein may contain "forward-looking statements" that are made pursuant to the Safe Harbor Provisions of the U.S. Private Securities Litigation Reform Act of 1995 or forward-looking information under applicable Canadian securities laws (collectively, "forward-looking statements"). Forward-looking statements are generally identified by using words such as "anticipate," "believe," "plan," "expect," "intend," "will," and similar expressions, but these words are not the exclusive means of identifying forward-looking statements. Forward-looking statements in this release include, without limitation, statements relating to expected developments and growth in Birchtech’s business and statements regarding the share repurchase program, including the commencement, timing, andamount of any repurchases. These statements are based on management’s current expectations and are subject to uncertainty and changes in circumstances. Investors are cautioned that forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from the statements made. These risks and uncertainties include, among others, that the Company may not repurchase any common shares under the program; that the program may be modified, suspended or discontinued; and that market conditions and regulatory limitations may limit the Company’s ability or willingness to make repurchases. In addition, this release contains time-sensitive information that reflects management’s best analysis only as of the date of this release. Birchtech does not undertake any obligation to publicly update or revise any forward-looking statements to reflect future events, information or circumstances that arise after the date of this release. Further information concerning issues that could materially affect financial performance or other forward-looking statements contained in this release can be found in Birchtech’s periodic filings with the Securities and Exchange Commission or Canadian securities regulators.

Investor Relations Contact:

Lucas A. Zimmerman

Managing Director

MZ Group – MZ North America

(949) 259-4987

BCHT@mzgroup.us

www.mzgroup.us