https://www.wired.com/story/tim-cook-data-broker-registry/

In an op-ed in TIME last week, Apple CEO Tim Cook called for a new federal privacy bill and a registry for data brokers that buy and sell data from third parties. Doing so would shed light on an insidious industry that many people may not even realize exists. It also wouldn't be easy.

For all of the talk over the last year about cracking down on companies like Facebook, Cook wrote that it’s this “shadow economy” of companies, most of whom the average consumer has never heard of, that deserves a closer look.