M. Witmark & Sons was a leading publisher of sheet music for the United States "Tin Pan Alley" music industry.The firm of Marcus Witmark & Sons was established in New York City in 1886. The father, Marcus Witmark, was the legal head of the company; but from the beginning it was run by his sons Isidore, Julius, and Jay, who were under legal age when the company started (ranging in age from 17 to 14 years old). They started out publishing their own compositions.