X0306 4 2022-03-05 0 0001580156 Houghton Mifflin Harcourt Co HMHC 0001787748 Evans Michael Edmund C/O HOUGHTON MIFFLIN HARCOURT 125 HIGH STREET BOSTON MA 02110 0 1 0 0 EVP, Chief Revenue Officer Common Stock 2022-03-05 4 A 0 17081 0.00 A 61999 D Common Stock 2022-03-05 4 F 0 6371 20.92 D 55628 D 17,081 performance stock units held by Mr. Evans vested on March 5, 2022 and were settled in exchange for a like amount of shares of Houghton Mifflin Harcourt Company's (the "Company") common stock, subject to the Company's withholding of 6,371 shares of common stock to satisfy withholding obligations in connection with federal, state, local or other taxes required to be withheld or paid in connection with the settlement of the performance stock units. William F. Bayers is the Executive Vice President, Secretary and General Counsel of the Company. s/ William F. Bayers, Attorney-in-Fact 2022-03-08