Murthy, who retired in August 2011, was called back in June last year to take charge of the once IT bellwether that failed to keep pace with the growth posted by industry peers like TCS and HCL Technologies.
"I'm grateful to K V Kamath, V Balakrishnan, T V Mohandas Pai, Ravi Venkatesan and to my family for the role they played in my coming back to the company," Murthy wrote in his letter in the company's annual report.
Balakrishnan, who was serving as Lodestone head when Murthy returned for his second stint, resigned from Infosys in December 2013. Bala, as he is popularly known, fought the 2014 Lok Sabha elections from Bangalore Central constituency on Aam Aadmi Party (AAP) ticket.
Kamath, who is the Lead Independent Director at Infosys, was named the Chairman when Murthy retired, a post he relinquished on Murthy's return. He is also the non-executive Chairman of the Board of Directors of ICICI Bank.