In December 2018, Hal Leonard announced it had sold five of its trade imprints-Hal Leonard Books, Applause Theatre & Cinema Books, Amadeus Press, Backbeat Books, and Limelight Editions-to Rowman & Littlefield. They also acquired Groove3, a leading website specializing in music technology tutorial videos.

In 2018, Hal Leonard purchased the physical and online printed music businesses of global independent music publisher The Music Sales Group. In 2017, Hal Leonard acquired the online music retailer Sheet Music Plus. Following the change in ownership, Hal Leonard was reorganized from a corporation to a limited liability company. Private equity firm Seidler Equity Partners acquired majority ownership of the company in June 2016. In 2014, Hal Leonard acquired Noteflight, an online music notation service and a community for sharing scores. In 2009, Hal Leonard acquired Shawnee Press from Music Sales Group. Also in 2006, Hal Leonard acquired Backbeat Books, which publishes the AllMusic reference guide and other music-related publications, from CMP. In 2006, Hal Leonard acquired Amadeus Press and Limelight Editions. In 2004, Hal Leonard acquired Applause Theatre and Cinema Books.

In 1997, Hal Leonard and Music Sales Group founded, the world's first website for digital sheet music and guitar tablature. In 1995, Hal Leonard began distributing Homespun Music Instruction instructional video and audio materials. In 1989, Hal Leonard acquired Jenson Publications and its catalog of band, orchestra, and choral titles. In addition, they distribute other brands, such as Gibraltar, Gretsch Drums, Avid, Blue Microphones, and many more. The company produces sheet music, songbooks, and method book (with audio) packs, and band, orchestra, and choral arrangements, reference books, instructional videos, and instrumental accompaniments. Currently headquartered in Milwaukee, Wisconsin, it is the largest sheet music publisher in the world. Hal Leonard LLC (formerly Hal Leonard Corporation) is an American music publishing and distribution company founded in Winona, Minnesota, by Harold 'Hal' Edstrom, his brother, Everett 'Leonard' Edstrom, and fellow musician Roger Busdicker.

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