How to Opt Out of Data Sharing From 40+ Companies

This website is a hub with links for over 40 companies to opt out of data sharing practices they have.
Simple Opt Out is drawing attention to opt-out data sharing and marketing practices that many people aren’t aware of (and most people don’t want), then making it easier to opt out.
At some point I’m definitely going down the list to see which companies I can opt out from.