According to Houghton Mifflin Harcourt's latest financial reports the company's current revenue (TTM) is £0.80 B. In 2020 the company made a revenue of £0.78 B a decrease over the revenue in the year 2019 that were of £1.05 B.The revenue is the total amount of income that a company generates by the sale of goods or services. Unlike with the earnings no expenses are subtracted.