Three sources familiar with the matter said News Corp was in talks to sell its stake in Move to CoStar for about $3 billion.
The deal would have recombined the media empire Murdoch split nearly a decade ago.
No offer was exchanged between News Corp and Fox Corp before merger deliberations were abandoned, according to sources familiar with the process, who said pushback from News Corp shareholders played a role in those plans being scrapped.
News Corp currently has a market capitalization of about $11 billion, while Fox is valued at a shade over $17 billion.
Rupert Murdoch and his family trust control about 40% of News Corp and Fox.