On Tuesday, the Department of Justice released Special Counsel Robert Mueller’s swampy finances. The report reveals Mueller’s law firm boasted clients such as Facebook, whose CEO, Mark Zuckerberg, is no fan of the President. The feeling is mutual. Mueller was also paid handsomely for a speech by Mexican bank Banamex.

POLITICO reports:

When special counsel Robert Mueller took his new job in May, he gave up a law firm partnership where he made almost $3.5 million since the beginning of 2016, according to a financial disclosure released by the Justice Department on Tuesday.

Mueller’s client list from his former firm, WilmerHale, reads like a who’s who of America’s most prominent businesses, including Facebook, Apple, Intel, Sony Pictures, Booz Allen Hamilton and the National Football League.

Mueller was also on the paid-speaking circuit in recent years, addressing businesses like Goldman Sachs, charities and and lecture series, as well as lobbying groups like the Nuclear Energy Institute and the Insurance Information Institute.

Mueller’s speaking engagements brought him about $162,000 since the beginning of 2016, the report says. His most lucrative speech during that period was to the Mexican bank Banamex for $52,000.

Mueller, a former FBI director, was named in May as a special counsel to investigate potential collusion between President Donald Trump’s campaign and Russian officials or agents.

Among Mueller’s tasks may be to examine whether Trump administration officials intentionally concealed foreign financial ties that should have been reported on the same financial disclosure form Mueller completed.

Mueller’s legal work for Facebook is notable because that company could potentially hold valuable data for his investigation.