“Regulatory cooperation” is set to be at the heart of the Transatlantic Trade and Investment Partnership (TTIP), which is currently under negotiation between the European Union and the US. A new report from the Corporate Europe Observatory warns that the treaty will allow bureaucrats and big business to attack the public interest. The report looks at cases of regulatory cooperation between the US and the EU that have had a negative impact on regulations in the public interest. It illustrates that TTIP was born out of a dialogue between big business and trade officials, and as a result clearly reflects the enthusiasm of transnational corporations for regulatory issues.