Is There A Longitudinal Dataset On US Newspaper Ownership Such That I Can Track Changes In The Ownership Of Any Given US Newspaper/daily Over A Period Of Time?

I want to look at how change in ownership affects the type of information conveyed by a newspaper, especially in cases where the acquirer may have a vested commercial motive. For example, there has been a significant uptick in the number of US newspapers acquired by private equity players. I’d like to see if such acquisitions affect the choice and delivery of content that may have direct commercial implications for the private equity owner.