was he involved in other businesses?
He owns a significant music publishing catalogue, with access to over 25,000 copyrights.
Paul McCartney
 In addition to an interest in Apple Corps and MPL Communications, an umbrella company for his business interests, he owns a significant music publishing catalogue, with access to over 25,000 copyrights, including the publishing rights to the musicals "Guys and Dolls", "A Chorus Line", "Annie" and "Grease". 
who sings the song man on the run UNANSWERABLE when was the song band on the run released? In April 1974 in the US and in June 1974 in the UK. does it belong to any band? Yes, Paul McCartney and Wings. can you name a few places where the band had toured? UNANSWERABLE is there any reference of the band in other art forms? UNANSWERABLE who are the band members? Beatle Paul McCartney, Linda McCartney, Denny Seiwell and Denny Laine. who is the first mentioned person? English singer, songwriter, musician, and record and film producer. what are his music skills? He is proficient on bass, guitar, keyboards, and drums. what was his opinion about lennon's death? He responded to the reporters, "It's a drag". what was his relation with ringo starr? They both collaborated on several post-Beatles projects. can you cite some of his achievements? He was inducted into the Rock and Roll Hall of Fame, and recognised by the "Guinness Book of World Records".
wiki:15528529
Paul McCartney [SEP] Business
Since the Rich List began in 1989, McCartney has been the UK's wealthiest musician, with an estimated fortune of £730 million in 2015. In addition to an interest in Apple Corps and MPL Communications, an umbrella company for his business interests, he owns a significant music publishing catalogue, with access to over 25,000 copyrights, including the publishing rights to the musicals "Guys and Dolls", "A Chorus Line", "Annie" and "Grease". He earned £40 million in 2003, the highest income that year within media professions in the UK. This rose to £48.5 million by 2005. McCartney's 18-date On the Run Tour grossed £37 million in 2012.