He is the founder and CEO of King Power Duty Free, an operator of duty-free shops.[2] In December 2009, King Power received the royal warrant from the King of Thailand in a ceremony attended by Raksriaksorn.[3] He is ranked by Forbes magazine as the 9th richest man in Thailand,[1] reportedly worth 109 billion baht (US$3.1 billion).[4]
Vichai purchased English football club Leicester City in August 2010 following a three-year shirt sponsorship deal.[5]
On 10 February 2011, he was named chairman of Leicester City while continuing as owner. His son, Aiyawatt Srivaddhanaprabha, is vice-chairman.[6]
Shortly before the 2016-2017 Premier League season Vichai gifted 19 BMW i8s to the players of Leicester City at £100k each.