What is the fine-grained topic of the following text: His prior investments include, CubeTree (acquired by SAP in 2012), Get Satisfaction (acquired by Sprinklr in 2015), Marketo (IPO 2013, acquired by Vista Equity in 2016), Signal Demand (acquired by PROS in 2013), Stellar Loyalty (acquired by Cheetah Digital in 2018) and Workday (IPO 2012, WDAY), along with private companies — Doximity, Engagio, and Opal Labs. Only return the topic.
Prior successful investments of an individual or company