Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 11 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Table of Contents As filed with the Securities and Exchange Commission on March 23, 2026. (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) (I.R.S. Employer Identification Numbe ...

Table of Contents As filed with the Securities and Exchange Commission on March 4, 2026. Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 9 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) (I.R.S. Employer Ident ...

Table of Contents As filed with the Securities and Exchange Commission on January 29, 2026. Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 8 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) (I.R.S. Employer Id ...

Table of Contents As filed with the Securities and Exchange Commission on November 10, 2025. Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 7 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) (I.R.S. Employer I ...

Amendment No. 5 UNDER to FORM S-1 REGISTRATION STATEMENT Table of Contents As filed with the Securities and Exchange Commission on May 20, 2025. Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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) (I.R.S. Employer Identification Number) (281) 449- ...

Table of Contents As filed with the Securities and Exchange Commission on March 17, 2025. Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 4 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) (I.R.S. Employer Iden ...

Table of Contents As filed with the Securities and Exchange Commission on January 27, 2025. Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION 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) Washington, D.C. 20549 Amendment No. 3 to FORM S-1 REGISTRATION STATEMENT UNDER (I.R.S. Employer Id ...