https://www.bleepingcomputer.com/news/technology/facebook-acknowledges-it-shared-user-data-with-61-companies/

In a 747-page document provided to the US House of Representatives' Energy and Commerce Committee on Friday, Facebook admitted that it granted special access to users' data to 61 tech companies.

According to the document, these 61 companies received a "one-time" extension so they could update their apps in order to comply with a Terms of Service change the company applied in May 2015.