ABC Watermark
ABC Watermark was a radio syndication entity that existed from 1982 until 1995.
The company came to be as the result of ABC Radio Networks' purchase of Watermark Inc. from its founders Tom Rounds and Ron Jacobs. The acquisition gave ABC control of Watermark's two major syndication properties, the Casey Kasem and Don Bustany creations American Top 40 and American Country Countdown.
Watermark ceased to exist after the cancellation of American Top 40 in 1995; it would later be revived by Kasem in 1998 and is currently distributed by Premiere Radio Networks. American Country Countdown has aired continuously since its premiere and continues to be distributed by ABC successor Cumulus Media.
References
Durkee, Rob. American Top 40: The Countdown of the Century. Schriner Books, New York City, 1999. ISBN 0-02-864895-1.