Hindustan Unilever today informed the Bombay Stock Exchange (BSE) that the company had completed the buyback of its fully paid-up equity shares from the existing shareholders at a price not exceeding Rs 230/- per equity share for an aggregate amount not exceeding Rs 630 crores.According to a release to the BSE, the company's buyback offer was open from October 03, 2007 to January 31, 2008.A total of 3,02,35,772 shares were bought back for an average price of Rs 207.13 for a total amount of approximately Rs 626.27 crore.As of January 31, 2008, the promoter shareholding in the company has gone up to 52.12% from 51.40%. Institutional investors' shareholding has gone up from 29.80% to 29.99%.Public shareholding in the company has gone down from 18.80% to 17.89.% after the buyback.