X0609 4 2026-04-02 0002021880 HMH Holding Inc HMH 0001759163 Loeffler Lance false 3300 NORTH SAM HOUSTON PARKWAY EAST HOUSTON TX 77032 true false false false false Class A Common Stock 2026-04-02 4 A false 8486 0 A 8486 D Class A Common Stock 2026-04-02 4 P false 5000 20.00 A 13486 D Represents restricted stock units granted to the reporting person under the HMH Holding Inc. 2026 Long-Term Incentive Plan on April 2, 2026. Each restricted stock unit represents a contingent right to receive one share of Class A common stock, par value $0.01 per share ("Class A Common Stock"), of HMH Holding Inc. (the "Issuer"). The restricted stock units vest on the day prior to the Issuer's first annual meeting of stockholders following the grant date. Represents shares of Class A Common Stock purchased by the reporting person through the directed share program conducted in connection with the Issuer's initial public offering. /s/ Dwight W. Rettig, attorney-in-fact 2026-04-06