A 12-person jury in a court in San Francisco had found that Pao's lawsuit against former employer Kleiner Perkins Caufield & Byers failed on all four counts, including the main issue of whether gender had been a consideration in the decision by the venture capital firm not to promote her.
The case has captured attention in the U.S. tech industry, where women are a minority. Pao had also charged with discrimination an old and reputed firm, which has invested in some key technology companies in the U.S. The lawsuit has emerged as a symbol of the struggle by women against alleged sexual discrimination in the workplace.
Pao, who is now interim CEO of social media company Reddit, has in a filing Monday in the Superior Court of California, County of San Francisco given notice that she is appealing the judgment entered on April 7 after the jury trial. The notice did not mention the grounds for the appeal.
Kleiner Perkins did not immediately comment on Pao's move.
In a lawsuit filed two years ago, Pao alleged that she had been a victim of sexual discrimination at the firm, which retaliated against her when she complained about her treatment.
She claimed she wasn't promoted to the more lucrative role of junior partner at the company because of a pervasive culture of sexism.