Live feed21:21:55·1554dSECFilingvia QuantisnowHoughton Mifflin Harcourt Company filed SEC Form 8-K: Entry into a Material Definitive Agreement, Financial Statements and ExhibitsByQuantisnow·Wall Street's wire, on your screen.HMHC· Houghton Mifflin Harcourt CompanyMiscellaneousOriginal source