Not sure on any ownership stake by the CCP, but it does seem that U.S. social media companies in general have zero loyalty to the U.S., its people, or the principles that the U.S. was founded on and stands for.

I get the impression that U.S. social media companies have a very sympathetic mindset and relationship with the CCP driven by social media company's desire to use their technology to surveil and drive the economic, social, and political direction of humans on a mass scale.