The Competition and Markets Authority (CMA) said the Intercontinental Exchange (ICE) should consider reversing its $650m (£495m) deal for Trayport, a commodities trading software operation.
The CMA said the deal “may be expected to lead to a substantial lessening of competition” in European energy trading markets.
The company hit back today, saying: “ICE does not agree with the findings which do not align with ICE’s vision for continuing to operate Trayport as an open and autonomous software provider.”
ICE said it was not expecting a CMA decision on the deal until mid-October.
The company said: “We do not believe that divestment is necessary, appropriate or in the best interests of Trayport’s customers.
“ICE is committed to retaining ownership of Trayport and is willing to memorialise its intentions with regard to Trayport’s future operation with formal CMA remedies.”