Casa Ricordi is a publisher of primarily classical music and opera. Its classical repertoire represents one of the important sources in the world through its publishing of the work of the major 19th-century Italian composers such as Gioachino Rossini, Gaetano Donizetti, Vincenzo Bellini, Giuseppe Verdi, and, later in the century, Giacomo Puccini, composers with whom one or another of the Ricordi family came into close contact.

Founded in Milan in 1808 as G. Ricordi & C. by violinist Giovanni Ricordi (1785–1853), the Ricordi company became a totally family-run organization until 1919, when outside management was appointed. Four generations of Ricordis were at the helm of the company, Giovanni being succeeded in 1853 by his son Tito (1811–1888) (who had worked for his father since 1825). Tito's son was Giulio (1840–1912). He had also worked for his father, beginning full-time in 1863, and then took over from 1888 until his death in 1912. Finally Giulio's son, also named Tito, (1865–1933) replaced his father until 1919. By the 1840s and throughout that decade, Casa Ricordi had grown to be the largest music publisher in southern Europe and in 1842 the company created the musical journal the Gazzetta Musicale di Milano.

As younger employees under their fathers and then as leaders of the company, the succeeding Ricordis made great strides in establishing publishing relationships with opera houses outside of Milan, including La Fenice in Venice and Teatro San Carlo in Naples. They also established branches of the company within Italy – in 1864 it expanded to Naples and then to Florence (1865), Rome (1871) and Palermo, as well as in London (1875) and Paris (1888). With this expansion under the elder Tito, another of his accomplishments was in modernizing printing methods. With the acquisition of rival publishers, by 1886 Ricordi handled 40,000 editions as well as the Italian rights to Wagner's operas. In the 20th century, the company's expansion continued with acquisitions and new branches, which included those in New York (1911), São Paulo (1927), Toronto (1954), Sydney (1956), and Mexico City (1958).

In its early days, the company established itself under the portico of the Palazzo della Ragione and then close to the La Scala opera house after 1844, eventually moving to its present location on the via Berchet. However, these premises suffered severe damage from aerial bombardment during World War II, but its collections had already been safely stored away. Following reconstruction after the war, Ricordi was converted to a limited corporation by the family in 1952 and in 1956 it became a publicly traded company. With 135,500 editions by 1991, Ricordi was acquired in 1994 by BMG Music Publishing, which in turn was purchased by Universal Music Publishing Group in 2007. It is now Italy's largest music publisher.