The potential owners of this data could include companies such as social media platforms or online stores which collect user information for various reasons ranging from marketing/advertising analytics through customer service inquiries. These entities may have some control of the data but ultimately, it is up to you as an individual. This will ensure that your privacy and security are maintained at all times.
Additionally, government entities like tax offices also play a role when comes down ownership personal data since laws require certain pieces information being made available authorities order progress investigations/complaints etc. Even here, I think that the individual must always be able to retain their full rights. This also applies when medical records are concerned.
Overall, I think it essential recognize importance protecting one’s personal property especially this digital age we live where so much attention given what happens with collected data thus why ownership needs remain sole responsibility those whom related info belongs allowing then decide under which circumstances said details can shared further otherwise not.