Goldman Sachs has had to postpone a second initial public offering this week after regulatory delays forced Anonima Petroli Italiana, an Italian oil refining and distribution company, to push back the launch date of the deal.

Anonima had been expected to complete its Milan flotation by the middle of June, but according to a market source the company was forced to delay the deal by a week because Italian market regulator Consob is only allowing "a few" deals to launch at one time. Consob is suffering from a backlog of deals.