The move builds on the existing credit-card partnership between the two companies.
The men involved are two of the firm's most prominent figures.
Officials have been looking into the Wall Street firm's online-banking platform aimed at retail customers.
Analysts expect the bank to post a more than 40% drop in earnings this year.
The messy exit of two employees who pulled in seven-figure paydays is a jarring turn in Wall Street's war for talent.
He is among nine people charged in a case that includes a former Republican member of Congress, Stephen Buyer.
The New York-based firm could reduce the pace of replacing staff it loses because of attrition.
Regulators found the firm's staff skirted regulatory scrutiny by using services such as WhatsApp.
The firm's investment-banking group posted $1.07 billion in revenue, down 55% from a year earlier.
The losses stem from the addition of new business lines, pandemic effects and expense bleed.
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