Yahoo's Jerry Yang has resigned from its Board of Directors and all other positions with the company, effective today.

In addition, Yang resigned from the boards of Yahoo Japan Corporation and Alibaba Group Holding Limited, effective today.

In a letter to the Yahoo! Board Chairman Roy Bostock, Yang wrote:

"My time at Yahoo!, from its founding to the present, has encompassed some of the most exciting and rewarding experiences of my life. However, the time has come for me to pursue other interests outside of Yahoo! As I leave the company I co-founded nearly 17 years ago, I am enthusiastic about the appointment of Scott Thompson as Chief Executive Officer and his ability, along with the entire Yahoo! leadership team, to guide Yahoo! into an exciting and successful future."

Yang co-founded Yahoo! Inc. in 1995 with David Filo and served as a member of the Board of Directors since March 1995 and as Chief Executive Officer from June 2007 to January 2009.

"Jerry Yang is a visionary and a pioneer, who has contributed enormously to Yahoo! during his many years of service," said Roy Bostock, Chairman of the Yahoo! Board. "It has been a pleasure to work with Jerry. His unique strategic insights have been invaluable. He has always remained focused on the best interests of Yahoo!'s stakeholders, including shareholders, employees and more than 700 million users. And while I and the entire Board respect his decision, we will miss his remarkable perspective, vision and wise counsel. On behalf of the Board, we thank Jerry and wish him all the very best in his future endeavors."

Bostock concluded, "We appreciate Jerry's comments and share his enthusiasm for the company's prospects. With Scott Thompson leading an outstanding team of Yahoos to deliver innovative products and an engaging customer experience, Yahoo!'s future is bright."