Germany company BERTELSMANN has increased its stake in radio and television company RTL GROUP to 90.4% by buying press company WAZ's share. The value of the deal has not been revealed, but at the time of the sale, the package of shares was worth some EUR 693 mil. RTL GROUP has increased to 100% its stake in the UK's FIVE, buying the remaining 35.4% it did not own from UBM - UNITED BUSINESS MEDIA for £247.6 mil.