 Houghton Mifflin Harcourt Co. shares HMHC, -1.89 rallied 12.6 premarket Tuesday, after the learning technology company said it has agreed to be acquired by Veritas Capital in a deal with an implied equity value of 2.8 billion. Under the terms of the deal, Houghton Mifflin Harcourt shareholders will receive 21 in cash for each share owned, equal to a premium of 36 over the companys closing share price as of Jan. 13, 2022. 