Take context from the input text and decide on the accurate relationship between 'RTL Group' and 'Bertelsmann' from the options provided.
Options: distribution format, stock exchange, distributed by, owned by

Bertelsmann also holds the majority of broadcaster RTL Group (Other OTC: RGLXF - news ) , which last week lifted its full-year sales forecast after regaining market share in its core German TV business.
owned by