The company began the 1990s with six television stations, but changes to federal radio and television ownership regulations allowed Tribune to expand its television station holdings over the next decade. Tribune Broadcasting purchased ten additional stations by 1997, six of them acquired through that year's purchase of Renaissance Broadcasting for $1.1 billion in cash. Tribune purchased a 12.5% stake in The WB Television Network in August 1995; the company had ten of its 16 stations affiliated with the network (including five that were signed as charter affiliates through The WB's initial 1993 affiliation deal with Tribune). Tribune invested $21 million in The WB in March 1997, which increased its equity interest in the network to 21.9%.