What would also be very interesting is a graph of relationships and movements. Let's see just how incestuous the boards really are, and what's going on with serial CEOs who move from one business to the next.
I worked on a knowledge graph map using Wikidata to get relationship between people and organizations, but data was limited to family, basic stuff. Being from Europe, there isn't an open data analogue of SEC. Now I will download this data, it is open so no license at all, and try to show these kind of relationships. It has the potential of being very investigative, especially for USA residents.
Northdata [1] does basically this, but mostly ingests European data currently. Perhaps they will expand to ingest US data as well at some point. Not affiliated with them in any way. I just use them to look into company structures every now and again.
[1] https://www.northdata.com/