X0708 D LIVE 0001701732 Altair Engineering Inc. 1820 E. BIG BEAVER ROAD TROY MI MICHIGAN 48083 248-614-2400 MICHIGAN None Altair Engineering Ing. Corporation true James R. Scapa 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Executive Officer Director Brett Chouinard 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Executive Officer Howard N. Morof 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Executive Officer Steve Earhart 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Director Jan Kowal 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Director Trace Harris 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Director Richard Hart 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Director James E. Brancheau 1820 E. BIG BEAVER ROAD Troy MI MICHIGAN 48083 Director Other Technology Decline to Disclose 06b false 2017-09-28 false true true At closing, our wholly owned subsidiary merged with and into Runtime Design Automation and Runtime became our wholly owned subsidiary. The stockholders of Runtime received cash and approximately 177,000 shares of our Class A Common Stock. 0 5051637 5051637 0 The aggregate merger consideration consists of an aggregate cash purchase price of US$18,675,000 and the issuance of an aggregate of approximately 177,000 shares of Altair's Class A Voting Common Stock. Offering amount reflects share value true 25 65 0 0 0 true false Altair Engineering Inc. /s/ Steven M. Rivkin Steven M. Rivkin General Counsel 2017-10-05