Conn-Selmer, Inc. is an American manufacturer of musical instruments for concert bands, marching bands and orchestras. It is a wholly owned subsidiary of Steinway Musical Instruments and was formed in 2003 by combining the Steinway properties, The Selmer Company and United Musical Instruments.

The Vincent Bach Corporation is a US manufacturer of brass instruments that began early in the early Twentieth Century and still exists as a subsidiary of Conn-Selmer, a division of Steinway Musical Instruments. The company was founded in 1918 by Austrian-born trumpeter Vinzenz Schrottenbach.