Harms, Inc.

T.B. Harms & Francis, Day, & Hunter, Inc., based in the Tin Pan Alley area of New York City, was one of the seven largest publishers of popular music in the world in 1920. T.B. Harms & Francis, Day & Hunter, Inc. was one of seven defendants named in a 1920 Sherman antitrust suit brought by the U.S. Justice Department for controlling 80% of the music publishing business. The seven defendants were:

Founded in 1881 as the Thomas B. Harms Music Publishing Company, T.B. Harms & Francis, Day & Hunter, Inc., was eventually incorporated in New York and changed its name to Harms, Inc. in 1921.

"Tin Pan Alley" was a specific area in New York City on 28th Street, between Broadway and 6th Avenue that, at the turn of the 20th century, was the epicenter of the popular music publishing industry. Many publishing firms were not actually located on that particular block, but, "Tin Pan Alley" was also as much a reference to a music industry district as it was to a music genre (popular music, ragtime – the precursor to what became jazz). T.B. Harms & Francis, Day, & Hunter, Inc. was a Tin Pan Alley firm.

As silent pictures evolved to talkies, Warner Brothers had aimed to build its inventory of published music. Before the , Warner Brothers acquired Harms, Inc., using 140,364 shares of its own stock, then valued at $8,421,840. Warner then reincorporated its acquisition under the laws of Delaware and named it Music Publishers Holding Company, Inc. Also in 1929, Warner Brothers acquired the music publishing company of M. Witmark & Sons.

...
Wikipedia