Like most people here I'm fairly hard line when it comes to personal data abuses but I still struggle with the concepts of owning data about yourself. It's a confusion I see amongst less technically literate people when a well meaning person explains to them the importance of some latest data breach and they try to understand the concept that they owned this data, it was theirs but now it has been "stolen" or abused in some way.
I would consider going as far to say that framing the data as owned by you is a bad approach, but maybe I'm just being pedantic about the language. Company A does have data about me, but I don't own it, and they have responsibilities to protect it (or delete it if requested), but I don't see any ownership in the equation, especially when the nature of the data can become quite abstract while still maintaining some reference to you.
Not to take away from the intention or sentiment of framing it that way though, I'm just musing.