On 26 April 2018, the ACM announced that it had ended its investigation into cartel agreements in the bunker sector in the Amsterdam–Rotterdam–Antwerp triangle. The ACM launched this investigation on the basis of leads regarding potential infringements in the bunker sector that the ACM received from the police and the Dutch Public Prosecution Service (OM).

The ACM  conducted several dawn raids on the basis of these leads. Following its investigation, the ACM concluded that, between 2011 and 2014, there had been discussions about a potential price-fixing agreement.