We complement the literature on common ownership by presenting two new observations from entrepreneurial startups. First, given the increase in common ownership of startups by VC investors, inclusion of high-value startups in standard common ownership measures may actually increase aggregate measures of common ownership. Second, we suggest that even if public-firm common ownership leads to collusive inefficiency and higher prices in the short-term, it may also create opportunities for entry of innovative high-growth startups. Consistent with this, we document that entrepreneurial activity and common ownership of startups tends to be higher in industries with higher common ownership among public firms.