Ajay Singh is an Indian entrepreneur, co-founder and present owner of Indian low cost airline SpiceJet.
Singh along with Bhupendra Kansagra acquired and rebranded ModiLuft in 2005 which was earlier owned by SK Modi and Lufthansa. Singh was a Director of SpiceJet Ltd until August 27, 2010, after which he transferred the ownership of the company to Sun Group's chairman and managing director Kalanithi Maran. Maran had acquired a 38.7 percent controlling stake at Spicejet, which forced Singh to quit from the board. On 15 January 2015, Singh re-acquired ownership of SpiceJet from Maran. In February 2015, Singh rejoined SpiceJet as a promoter and bought a controlling stake for Rs 2.
He is also actively involved with Bhartiya Janata Party. He coined the slogan "Abki baar Modi Sarkar".