Airbnb announced on Thursday its Chief Financial Officer Laurence Tosi is stepping down and that it won’t go public this year. So long rumored 2018 Airbnb IPO. Tosi, who was CFO at the Blackstone Group prior to joining Airbnb as CFO in 2015, brought Wall Street experience to the San Francisco startup. The company said Tosi is leaving to focus on his investment fund.