The document outlines the four major record labels - Universal Music Group, Sony BMG Music Entertainment, EMI Group, and Warner Music Group - and provides details on their market share in 2005, label imprints, and key artists. Universal Music Group had the largest market share at 25.5% while Warner Music Group had the smallest at 11.3%. The major label imprints and some of their iconic artists are also noted for each company.

1. The four major record labels.

2. 1. Universal Music Group The Universal Music Group sells more music than any other major label. They accounted for 25.5% of the market in 2005 . The group's well-known label imprints include Universal, Island, Interscope and many more. Their key artists are: Black Eyed Peas, Mariah Carey, 50 Cent, Gwen Stefani and Kanye West.

3. 2. Sony BMG Music Entertainment. Sony BMG Music Entertainment is the second biggest major record label in music sales. They accounted for 21.5% of the market in 2005. The company's well-known label imprints include Columbia, Epic, RCA and many more. Key artists are: Kelly Clarkson, Alicia Keys, Outkast, Shakira and Britney Spears.

4. 3. EMI Group. The EMI Group is the third biggest major record label in music sales. They accounted for 13.4% of the market in 2005. The group's well-known label imprints include Capitol, Virgin, Mute and many more. Key artists are: The Beatles, Coldplay, The Rolling Stones and Robbie Williams.

5. 4. Warner Music Group. The Warner Music Group is the fourth major record label in music sales. They accounted for 11.3% of the market in 2005. The group's well-known label imprints include Atlantic, Reprise, Warner Bros, and many more. Key artists are: Green Day, Madonna, Alanis Morrissette, My Chemical Romance and Rob Thomas.