v3.26.1
Earnings per Share - Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Numerator (in thousands)          
Net income (loss) $ (5,019) $ 3,875 $ 9,768 $ (1,144) $ 15,646
Less: Net income (loss) attributable to non-controlling interests (9,995)   819 (9,568) 585
Net income (loss) attributable to HMH Holding Inc. $ 4,976   $ 8,949 $ 8,424 $ 15,061
Denominator (actual shares)          
Weighted-average shares of common stock for HMH and HMH B.V. outstanding—basic (in shares) [1] 11,662,000   69,355,000 5,863,000 69,355,000
Effect of dilutive securities (in shares) 309,000   0 825,000 0
Weighted-average shares of Class A Common stock outstanding—diluted (in shares) [1] 11,971,000   69,355,000 6,688,000 69,355,000
Net income (loss) per share of common stock (actual)—Basic (in dollars per share) [1] $ 0.43   $ 0.13 $ 1.44 $ 0.22
Net income (loss) per share of Class A common stock (actual) — Diluted (in dollars per share) [1] $ 0.42   $ 0.13 $ 1.26 $ 0.22
[1] Basic and diluted shares used for computing earnings per share for periods prior to our initial public offering (“IPO”) have been retrospectively adjusted to give effect of the organizational transactions. The calculation of basic and diluted weighted average shares used for calculating earnings (loss) per share for the three and six months ended June 30, 2025 does not include the 11.2 million shares of Class A common stock sold in the IPO. See Note 19—“Earnings per Share” in the notes to HMH’s Condensed Consolidated Financial Statements.