As filed with the Securities and Exchange Commission on August 23, 2024. Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 1 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 HMH Holding Inc. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) Delaware 3533 99-2746883 (Primary Standard Industrial Classification Code Number) 3300 North Sam Houston Parkway East (I ...

Table of Contents Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 HMH Holding Inc. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) 3300 North Sam Houston Parkway East Delaware 3533 99-2746883 (I.R.S. Employer Identification Number) As filed with the Securities and Exchange Commission on August 12, 2024. Registration No. 333- UNITED STATES SECU ...