EX-2.1 2 d239763dex21.htm EX-2.1 UNIT PURCHASE AGREEMENT BY AND AMONG APPTIO, INC., DIGITAL FUEL SV, LLC, THE SELLERS IDENTIFIED ON SCHEDULE 1 AND SOLELY FOR PURPOSES OF SECTIONS 6.5 AND 6.7 AND ARTICLES VII AND VIII, SKYVIEW CAPITAL, LLC, AS SELLERS’...