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Dataset for relationships between companies?

I'm trying to create a program wherein a person or company can be taken as input and all of their relationships to other people and companies are output. If Papa John's CEO John Schnatter makes controversial comments, PZZA will likely lose value. Moreover, if Domino's owns 30% of Papa John's (they don't really), we can expect Domino's to suffer a setback as well.

Admittedly it's been a while since I've used quantopian, but so far I've only been able to find dollar amounts relating to companies' investments in subsidiaries. Are there datasets that provide comprehensive company data from filings in string format, like lists of top executives or interests in other publicly traded companies?