X0202 SCHEDULE 13G 0001086619 XXXXXXXX LIVE CL A 06/30/2026 0002021880 HMH Holding Inc 40445M100 3300 North Sam Houston Parkway East Houston TX 77032 Rule 13d-1(b) SCHRODER INVESTMENT MANAGEMENT GROUP X0 609527.00 0.00 609527.00 0.00 609527.00 5.3 IA Schroder Investment Management North America Inc. X1 609527.00 0.00 609527.00 0.00 609527.00 5.3 IA HMH Holding Inc 3300 North Sam Houston Parkway East Houston, Texas 77032 United States Schroder Investment Management Group London Wall Place, London, EC2Y 5AU, GB, United United Kingdom, N IA 609,527 5.3 % 609,527 0 609,527 0 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. SCHRODER INVESTMENT MANAGEMENT GROUP /s/ Thomas Darnowski 08/11/2026 Schroder Investment Management North America Inc. /s/ Thomas Darnowski 08/11/2026 **Authorized by Power of Attorney to sign on behalf of the below Advisers: Schroder Investment Management Group