On June 15, 2021, the board of directors of Tecogen Inc. (the “Company”) increased the size of the Company’s board of directors from seven directors to eight directors and appointed Abinand Rangesh as a director to fill the resulting vacancy. Dr. Rangesh will serve as a director of the Company until his resignation, death, or removal. Dr. Rangesh has been an employee of the Company since 2017, serving as Vice President & General Manager since March 2021, as Director of Corporate Strategy from 2019 to 2021, and as Director of Project Development from 2017 to 2019. From 2014 to 2016, Dr. Rangesh served as CEO at Lumi Ventures, as CTO of Lumi Solaire LLC and as COO of Peek You. On June 15, 2021 the Company’s board of directors appointed Mr. Ralph Jenkins as a member and as the Chairman of the Company’s Audit Committee.