This subsequently led to three board members who had been recommended on the board by Icahn to resign.[43] The move to buy back shares was seen by analysts of the company's assurance in Grand Theft Auto V, which was released in September 2013. Grand Theft Auto V has since sold nearly 100 million units by 2018, making it one of the most successful video games ever and bringing an estimated US$6 billion to Take-Two, increasing its stock value by more than 600%.[44]