(4)Pursuant to Article 18 of Regulation (EU) No 596/2014, persons acting on behalf or on the account of an entity are to draw up and promptly update a list of all persons who have access to inside information that concerns that entity and who are working for them under a contract of employment, or are otherwise performing tasks through which they have access to inside information. To avoid unnecessary duplication of data and to minimise administrative burdens, where a legal person acts on behalf or on the account of an entity (‘third-party service provider’) and has access to inside information which directly concerns that entity, that entity should include in its insider list the details of only one natural person acting as a contact person for that third-party service provider.