Birchtech Corp. Chairman Christopher Greenberg resigns; CEO MacPherson appointed interim Chairman

Birchtech Corp.

Christopher Greenberg resigns as director and Chairman of the Board effective July 1, 2025, to focus on other business pursuits.
Resignation not due to any disagreement with the Company on operations, policies or procedures.
Richard MacPherson, President and CEO, appointed interim Chairman effective July 1, 2025; Board will not fill the vacancy at this time.

item 5.02item 9.01

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Departed

Christopher Greenberg

Director and Chairman of the Board

BCHT · Birchtech Corp.

Effective: 2025-07-01
Successor: Richard MacPherson
Filed: Jun 20, 2025 23:59 UTC

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

Appointed (interim)

Richard MacPherson

Chairman of the Board (interim)

BCHT · Birchtech Corp.

Effective: 2025-07-01
Filed: Jun 20, 2025 23:59 UTC

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.

Source: SEC EDGAR

accession 0001477932-25-004727

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