ETrade
Etrade have just revealed they are partnering with MS so this doesn't instill confidence.
"As of October 2, 2020, E*TRADE has joined forces with Morgan Stanley, a leading wealth management and investment banking firm. As a result of this transaction, we've updated our Consumer Privacy Notice to include Morgan Stanley as an affiliate and to permit the inter-affiliate sharing of creditworthiness data for everyday business purposes.
We are required to provide you with this updated Privacy Notice for your E*TRADE account, as federal law requires us to tell you how we collect, share, and protect your personal information, as well as how you can opt out of certain types of sharing.”