HMH(HMH) - Prospectus(update)

Table of Contents As filed with the Securities and Exchange Commission on August 19, 2025. Washington, D.C. 20549 Amendment No. 6 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 HMH Holding Inc. (Exact name of registrant as specified in its charter) Registration No. 333-281497 UNITED STATES SECURITIES AND EXCHANGE COMMISSION (I.R.S. Employer Identification Number) Houston, Texas 77032 (281) 449-2000 (Address, including zip code, and telephone number, including area code, of registrant's ...