In 1989, Hal Leonard acquired Jenson Publications and its catalog of band, orchestra, and choral titles.

[citation needed] In 2004, Hal Leonard acquired Applause Theatre and Cinema Books.

[5] Also in 2006, Hal Leonard acquired Backbeat Books, which publishes the AllMusic reference guide and other music-related publications, from CMP.

[7] In 2014, Hal Leonard acquired Noteflight, an online music notation service and a community for sharing scores.

It also has offices abroad in Australia, Belgium, China, Germany, the Netherlands, India, Italy, Switzerland, as well as in London and Bury St. Edmunds in England.

[13] In 2023, Hal Leonard was acquired by Muse Group, owners of other sheet music-related products such as MuseScore, Ultimate Guitar, and StaffPad.