Personality clashes with Linus Cheung, the station’s new executive chairman, were cited as the reason for his alleged departure.
Wong took the ATV post on 4 December while continuing to serve as chairman and executive director of City Telecom, which he founded.
The news comes on the heels of senior executives Dewy Ip, executive vice-president, Peter Kwan, senior VP for news and public affairs, and Howard Ho, senior VP for engineering, who all resigned earlier this month.
Veteran newsman Leung Ka-wing, who also resigned last week, has decided to stay on at the station.