Global Telecommunications Holding N.V, a Netherlands-based firm that is a unit of Malaysia's UT group, bought a 35.19 percent stake in Sri Lanka Telecom in 2008 at 50.50 rupees a share.
The deal, valued at 32 billion Sri Lanka rupees, was the largest ever deal in the history of the island's capital markets.
The Sri Lanka government is the largest shareholder in SLT with a 49.5 percent stake in the firm.