Media giant Reuters Group Plc announced Tuesday it will buy San Francisco-based investment research group StarMine for an undisclosed amount.

The British media group, which is being taken over by Canadian publishing company Thomson Corp., said StarMine's analytics will be added to its Reuters Knowledge product.

The privately owned StarMine, founded in 1998, had gross assets of $16.3 million as of June 30, according to Reuters.

Thomson agreed in May to buy Reuters for $17.2 billion (8.7 billion pounds), which will eventually create the world's largest financial data provider to trading rooms, and will be called Thomson-Reuters.