These records were made to be listened to, not broken. Warner Music Group (WMG) is one of the world's largest recording companies, ranking #3 in terms of US market share (behind Universal Music Group and Sony Music Entertainment). It operates through two businesses: Recorded Music and Music Publishing. Its Recorded Music catalog includes best-selling albums The Eagles: Their Greatest Hits 1971-1975 and Led Zeppelin IV. Its Music Publishing business holds more than one million copyrights from some 65,000 songwriters. In mid-2011, WMG was acquired by diversified business group Access Industries.