Houghton Mifflin Harcourt to Participate in 6th Annual Wells Fargo Securities Technology, Media & Telecom Conference

BOSTON — Global learning company Houghton Mifflin Harcourt (“HMH” or the “Company”) (NASDAQ: HMHC) announced today that it will participate in the 6th Annual Wells Fargo Securities Technology, Media & Telecom Conference at the Waldorf Astoria Hotel in New York City on Tuesday, November 10, 2015. Linda Zecher, HMH’s President and Chief Executive Officer, will participate in a conversation and question-and-answer session beginning at 3:10 p.m. Eastern Time. A live webcast will be available on the events page of the Company’s investor relations website, http://ir.hmhco.com/events.cfm. A replay will also be available for seven days following the event.

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About Houghton Mifflin Harcourt Houghton Mifflin Harcourt (NASDAQ:HMHC) is a global learning company dedicated to changing people's lives by fostering passionate, curious learners. As a leading provider of pre-K-12 education content, services, and cutting-edge technology solutions across a variety of media, HMH enables learning in a changing landscape. HMH is uniquely positioned to create engaging and effective educational content and experiences from early childhood to beyond the classroom. HMH serves more than 50 million students in over 150 countries worldwide, while its award-winning children's books, novels, non-fiction, and reference titles are enjoyed by readers throughout the world. For more information, visit www.hmhco.com. Follow HMH on Twitter, Facebook and YouTube. CONTACT Investor Relations Rima Hyder Vice President, Investor Relations 617-351-3309 rima.hyder@hmhco.com Corporate Communications Bianca Olson Senior Vice President, Corporate Affairs 617-351-3841 bianca.olson@hmhco.com