In an interview Larry Fink, CEO of Blackrock, told the Swiss newspaper Finanz und Wirtschaft that they will continue to do business with Credit Suisse despite the guilty plea.
Would Credit Suisse have lost its banking licence in the United States, then ending the relationship would have been a realistic option.

The CEO added that clients can add restrictions about not doing business with a bank that has been found guilty, then they would respect that for that particular client. At the end it is the clients’ choice and decision.

See also Reuters article.