See Article 7 para. 2 of the agreement between the European Union and the Swiss Confederation concerning cooperation on the application of their competition laws (EU Agreement;  available here: https://www.weko.admin.ch/weko/en/home/rechtliches_dokumentation/legislation.html) the DG Comp and COMCO may discuss any information, including information obtained by investigative process, as necessary to carry out the cooperation and coordination provided for under the Agreement.