SIS has approved, in principle, a proposal to undertake a share buyback of up to Rs 120 crore, marking its fifth buyback since listing in August 2017.The company has fixed the maximum buyback price at Rs 478.50 per share, representing a 10% premium to the previous closing price of Rs 435. Based on the maximum buyback size, SIS could repurchase around 25 lakh shares, though the final number will depend on the buyback price.With the latest proposal, the company's cumulative capital returned to shareholders through buybacks and dividends is expected to rise to around Rs 720 crore. Prior to the proposed buyback, SIS had returned approximately Rs 600 crore, comprising around Rs 420 crore through four buybacks and about Rs 180 crore through dividends.The company has bought back nearly 86 lakh shares across its previous four buyback programmes. Including the proposed buyback, the cumulative number of shares repurchased could exceed 1.11 crore shares.Commenting on the proposal, Group Managing Director Rituraj Kishore Sinha said the company will continue to evaluate opportunities to return surplus capital to shareholders, adding that the proposed buyback, like the previous four, is expected to be accretive to earnings per share and return on capital.The mode, timeline and detailed terms of the buyback will be finalised after receiving the necessary approvals from the board, shareholders and regulators, in accordance with the Companies Act and Sebi's buyback regulations.SIS is an Indian multinational providing security solutions, facility management and cash logistics services. The company employs over 3 lakh people and is among India's largest private-sector employers, with operations across more than 600 districts and a significant presence in Australia.