Justin Sullivan/Getty Images(CNN) - Arianna Huffington is leaving the board of Uber after three years. She joined the company's board of directors in 2016 as its first female board member. In the regulatory filing, Huffington cites the growth of her media company, Thrive Global, as reason for her departure. Additionally, another board member Matt Cohler, a general partner at venture capital firm Benchmark, has also resigned from the board. According to a separate regulatory filing, Cohler resigned Tuesday, one day prior to Huffington.