While Personal Capital words their answer to this as if it's a no, in other areas they suggest they do share some data with 3rd parties, so it's not quite clear how this works -- however according to Personal Capital they do not share 'sensitive information' like your networth or any of your financial data, nor do they share (or even have access to) the passwords or usernames of linked accounts.If Personal Capital sells or shares anything it seems like it'd only be your email, your name, and that you have an account with them -- beyond this it doesn't seem like they could share or sell your data without getting into trouble based off the legalese they've stated on their website