In December 2014, Sacks became a shareholder in Zenefits, making a “major investment,” according to VentureBeat.[38] In January 2016, Zenefits’ Board asked him to step in as interim CEO amidst a "regulatory crisis" regarding the company's licensing compliance.[39] Over the next year, Sacks negotiated a resolution with insurance regulators across the U.S. – receiving praise for “righting the ship.”[40] Sacks also revamped[41] Zenefits’ product line with an initiative he named “Z2,”[42][43] introducing a SaaS business model.