On October 27, 2021, in connection with the IPO, Patrick Murley, Robert McMaster and Lee Muller (the ?New Directors? and, collectively with Jim Tumulty and Stephen Smith, the ?Directors?) were appointed to the board of directors of Seaport Calibre Materials Acquisition Corp. (the ?Board?). Effective October 27, 2021, each of Patrick Murley, Robert McMaster and Lee Muller was also appointed to the Board?s Audit Committee and each of Patrick Murley and Lee Muller was appointed to the Board?s Compensation Committee, with Robert McMaster serving as chair of the Audit Committee and Patrick Murley serving as chair of the Compensation Committee.