Hang Seng Bank Corporation is the second largest bank in Hong Kong. It is a listed company but it is majority owned (62.14% equity interest) by the HSBC Group via The Hongkong and Shanghai Banking Corporation. Hang Seng is also one of the constituent shares of the Hang Seng Index. The current vice-chairman and CEO is Margaret Leung Ko May Yee. Former CEO Vincent Cheng has been appointed to be the Chairman of the Hongkong and Shanghai Banking Corporation, and took up the post on May 25, 2005.