[1] They have a partnership with Universal Music Group called U5, which releases approximately 50 digital compilation albums per month.

[4] X5 Music Group was founded in Stockholm, Sweden in 2003[5] by Johan Lagerlöf, Daniel Bäckström, and Stefan Enberg.

CEO Lagerlöf, for example, had previously co-founded companies such as Mobilehits, Scandinavia's the most popular music site, and was also a songwriter/producer for Stockholm Records.

[8] The New York Times stated "To attract classical neophytes, X5’s collections have search-engine-friendly titles and simple, self-explanatory cover art.

[6] The 50 Greatest Pieces of Classical Music compilation includes selections performed by the London Philharmonic Orchestra under the direction of David Parry, with soloists such as pianist Finghin Collins.

Former Amazon and eMusic music executive Scott Ambrose Reilly was hired as North American CEO.

[7] They began forming partnerships with non-classical labels such as Sun Records, whose back catalog included artists such as Johnny Cash and Jerry Lee Lewis.

[7] In November 2011 X5 released one of its most successful albums, The Greatest Video Game Music, performed by the London Philharmonic Orchestra and produced by Andrew Skeet.

[10] The twenty-one track set[15] features classical orchestrations of video game themes such as Super Mario Bros., Call of Duty, Final Fantasy, World of Warcraft, and Angry Birds.

[2] Later releases focused on jazz and blues, including artists such as Miles Davis, John Coltrane, and Thelonious Monk.

[18] In April 2013 The New York Times stated that "X5’s techniques are now widely imitated, and its profit margins are the envy of any record label."