Power of Attorney for Thomas W. McGee

This filing details a Power of Attorney granted by Thomas W. McGee, Chief Financial Officer of HMH Holding Inc., to Dwight W. Rettig and Cindy Nichols. This grants them the authority to execute and file necessary SEC documents, including Forms 3, 4, and 5, on Mr. McGee's behalf. The attorneys-in-fact are empowered to handle all aspects of electronic filing, information gathering regarding company securities, and any other actions deemed beneficial or legally required. This Power of Attorney remains effective until Mr. McGee is no longer required to file these forms, or until revoked in writing, or until the attorneys-in-fact are no longer employed by the company. The document was executed on August 20, 2024.