Form 4 Filing by HMH Holding Inc. Officer Pal Skogerbo

On May 18, 2026, Pal Skogerbo, Chief Technology Officer of HMH Holding Inc., reported a disposition of 26,713 shares of Class A Common Stock. This disposition was to satisfy tax withholding obligations upon the vesting of restricted stock units, with shares withheld at a price of $19.28 per share. Following this transaction, Mr. Skogerbo held 47,031 shares. On June 19, 2026, Mr. Skogerbo was granted 13,398 restricted stock units under the company's 2026 Long-Term Incentive Plan. These units have a de minimis transaction price of $0.00 and vest in three equal installments between September 2027 and June 2029. After this grant, his total holdings increased to 60,429 shares.