All three were presented last week with the Rajiv Gandhi Khel Ratna award, the country's highest sports honour, from Indian President Pratibha Patil.
Under the agreement, the company will coordinate both the athletes endosrsements, media activities and brand management in the build-up to London 2012.
Kumar said: "I am happy to be associated with a professional sports group.
"Now I can completely focus towards my sports as there are experts to handle all my activities outside the ring."
Kom, the four-time world champion, is expected to have a particularly high-profile in the build-up to London 2012 when women's boxing will make its Olympic debut.
Last week she signed an agreement with Olympic Gold Quest, a foundation dedicated to helping India's athletes, to help her with her preprations.
"Gold Quest is a trust which is supporting athletes for training and IOS would be looking after my commercial interest.
August 2009: Wrestling finally gets the recognition it deserves, says Kumar
August 2009: Indian boxing favourite signs up with OGQ