TF vice-president of PR Alison Hagan declined to confirm details of the sale of the IR consulting business.
But industry sources said the sale was in line with plans to concentrate solely on the financial data and information side of the firm.
The consulting division is part of Thomson Financial/Carson, which also houses CIM, the firm's corporate market intelligence unit.
TF bought the Carson Group, which specialises in IR, financial information and corporate strategic intelligence, in 2000 to form TF/Carson.
Last month, TF announced its new global PR line-up following a wider business restructure (PRWeek, 22 February). Former Mantra account director Alex Brog was named PR director for Europe, with US-based Hagan leading group communications international ly.
TF realigned itself away from products and into four strategic customer units: investment banking, investment management, corporate and wealth management.
The central marketing function now comprises 20 staff in Europe, 50 in the US and ten in Asia.