The Competition and Markets Authority is set to reverse the deal in what would be the first time the watchdog has reversed a Big Tech acquisition, the report said, citing individuals close to the matter.
Meta Platforms and the regulator did not respond to requests for comment from Reuters sent outside working hours.
The regulator had in October fined the U.S. social media giant Facebook, now Meta, 50.5 million pound ($67.35 million) for breaching an order that was imposed during an investigation into its purchase of the GIF platform, Giphy.
Facebook bought Giphy, a website for making and sharing animated images, or GIFs, in May last year to integrate it with its photo-sharing app, Instagram. The deal was then pegged at $400 million by Axios.