Buyback of shares by unlisted us company

This query is : Resolved

Querist : Anonymous

Querist : Anonymous (Querist)

20 June 2013 I had been working with a US registered company initially in India and then in USA ,London and then again in India. The shares of this company are still UNLISTED. During the period of working with the company I was allotted 25000 shares periodically at 1c per share. Now after holding the shares for about 6 years, the company has offered for buyback at $5 per share.
Presently I am working for a different company registered in India.
In case of offering my entire holding against the buyback offer, what would be income tax implications for me. My present earnings as individual are more than 25 lacs per annum.