Houghton Mifflin Harcourt Announces Fourth Quarter and Full Year 2020 Results, Achieved 2020 Billings at the Top End of its Revised Guidance Range and Positive Free Cash Flow SaaS billings growth of 142% and digital platform usage growth of 306% as HMH continues transformation to K-12 pure-play learning technology company; Successful achievement of HMH 2020 strategy lays foundation for Digital First, Connected future News provided by Share this article Share this article BOSTON, Feb. 25, 2021 /PRNewswire/ -- Learning technology company Houghton Mifflin Harcourt ("HMH" or the "Company") (Nasdaq: HMHC) today announced financial results for the fourth quarter and full year ended December 31, 2020 and introduced new operational metrics HMH will use to track growth in recurring revenue and progress on connected solutions selling.