X0206 3 2017-10-31 0 0001701732 Altair Engineering Inc. ALTR 0001720806 Brink John R C/O ALTAIR ENGINEERING INC. 1820 E. BIG BEAVER ROAD TROY MI 48083 0 0 1 0 Class A Common Stock 52000 D Stock Option (right to buy) 0.00 2036-12-01 Class A Common Stock 1371108 D After giving effect to the closing of the initial public offering, Reporting Person will no longer be subject to Section 16. The options vested fully upon grant. The option is fully vested. The option exercise price is $0.000025. Exhibit List Exhibit 24 - Power of Attorney /s/ John Raymond Brink 2017-10-31