Turkish Competition Board initiated an investigation on 27 August 2018 on BP Petrolleri A.Ş., OPET Petrolcülük A.Ş., Petrol Ofisi A.Ş. and Shell & Turcas Petrol A.Ş. following a preliminary inquiry based on allegations that their practices concerning their dealers had infringed Article 4 of the Competition Act No. 4054 prohibiting anti-competitive agreements, concerted practices and decisions. The press release dated 26.09.2018 about the investigation, initiated by the decision numbered 18-29/484-M, is available via http://www.rekabet.gov.tr/tr/Guncel/bp-petrolleri-a-s-opet-petrolculuk-a-s-p-157c1f8857c1e81180e300505694b4c6