Live feed17:06:25·1841dINSIDERFilingvia QuantisnowSEC Form 4: Greenthal Jill A exercised 12,500 units of Common Stock at a strike of $0.00, increasing direct ownership by 26% to 60,053 unitsByQuantisnow·Wall Street's wire, on your screen.HMHC· Houghton Mifflin Harcourt CompanyMiscellaneousOriginal source