Wikipedia says,

On 4 July 1997, the Millennium development studio, along with several of the projects in development, was sold to Sony Computer Entertainment and renamed to SCEE Cambridge Studio. [...] On 10 January 2012, Sony Computer Entertainment restructured Cambridge as a subsidiary of Guerrilla Games, primarily to develop Killzone games for the PlayStation Vita.[2] Sony Computer Entertainment then rebranded the studio as Guerrilla Cambridge.[3] On 12 January 2017, Sony confirmed the closure of Guerrilla Cambridge.

Does this mean Sony owns any IPs created by Millenium?