Houghton Mifflin Harcourt Schedules Conference Call to Discuss First Quarter Results

BOSTON – Houghton Mifflin Harcourt Company (HMH) (NASDAQ: HMHC) today announced that it will release its first quarter 2015 financial and operating results on Thursday, May 7, 2015, before the market opens. At 8:30 a.m. EDT on Thursday, May 7, 2015, HMH will also host a conference call to discuss the results with its investors. The call will be webcast live at www.ir.hmhco.com. The following information is provided for investors who would like to participate: Toll Free: (844) 835-6565 International: (484) 653-6719 Passcode: 27495283 Moderator: Rima Hyder, Vice President, Investor Relations Webcast Link:  http://edge.media-server.com/m/p/mmbsue44 An archived webcast with the accompanying slides will be available at ir.hmhco.com for one year for those unable to participate in the live event. An audio replay of this conference will also be available until May 14, 2015 via the following telephone numbers: (855) 859-2056 in the United States and (404) 537-3406 internationally using passcode 27495283.

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 VP, Investor Relations 617-351-3309 rima.hyder@hmhco.com Corporate Communications Bianca Olson SVP, Corporate Affairs 671-351-3841 bianca.olson@hmhco.com

Forward Looking Statements This news release may contain certain statements that are not historical facts, including information regarding our intentions, beliefs or current expectations concerning, among other things, our results of operations, financial condition, liquidity, prospects, growth, strategies, the industry in which we operate and potential business decisions.  Those statements constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.  Forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause our actual results to differ materially from the results expressed in or implied by our forward-looking statements, including, but not limited to, changes in state and local education funding and/or related programs, legislation and procurement processes; adverse or worsening economic trends or the continuation of current economic conditions; changes in consumer demand for, and acceptance of, our products; industry cycles and trends; conditions and/or changes in the publishing industry; and other factors discussed in our news releases, public statements and/or filings with the U.S. Securities and Exchange Commission, including our most recent Annual and Quarterly Reports on Form 10-K and Form 10-Q. We undertake no obligation, and do not expect, to publicly update or publicly revise any forward-looking statement, whether as a result of new information, future events or otherwise.