It came as a big surprise on Monday, when it was announced that Cyrus Mistry has been removed as the chairman of the Tata group, and his predecessor Ratan Tata is back at the helm. Cyrus Mistry will however, continue as the director of the group. Here is the list of some CEO's of top companies across the globe who were sacked suddenly or resigned themselves. Al Jazeera America CEO Ehab Al Shihabi: He was replaced as CEO of the media company after it was sued for $15 million in may 2015, over allegations of sexismat the company. Al Shihabi was reportedly blamed by an executive for presiding over a "culture of fear.". Replacing him, the company named l Anstey as the new CEO. HTC CEO Peter Chou: The company replaced Chou as CEO with co-founder Cher Wang in March 2015, who who was increasingly involved in running several aspects of the business. Chou stayed on head of the HTC Future Development Lab. McDonald's CEO Don Thompson: Fast-food company cDonald's announced that Don Thompson was retiring as CEO of the company after 25 years in January 2015. He was replaced by Steve Easterbrook, who was senior executive vice president and chief brand officer. American Apparel founder and CEO Dov Charney: After been suspended for six-month from the popular clothing company, Dov Charney was officially sacked after allegations of misusing corporate funds in December 2014. In 2009, the firm was criticised for hiring illegal immigrants to work in its Los Angeles factory. Charney was also accused of sexually harassing female employees Charney then sued American Apparel for $40 million in damages for a breach of contract. Oracle co-founder and CEO Larry Ellison: The Oracle co-founder resigned as CEO in September 2014. After resigning Ellison announced that he would remain with the company as executive chairman of the board.