US Prosecutors Indict 30-Person Insider Trading Network Spanning Eight Elite Law Firms Including Wachtell, Latham, and Cleary

A sweeping federal indictment has charged a 30-person insider trading ring that prosecutors allege operated for a decade inside the upper echelons of Big Law, recruiting Ivy League-trained attorneys from firms including Wachtell, Latham, Willkie, Goodwin, Cleary, Sidley, Weil, and DLA Piper. Prosecutors describe the network as one of the most extensive M&A intelligence operations ever prosecuted on American soil, with participants allegedly treating confidential merger data as a tradeable asset rather than privileged client information. The core allegation is that lawyers with access to live M&A deal information — spanning deal structuring, due diligence, and documentation phases — fed that intelligence into a coordinated trading scheme across an extended period. The breadth of firm representation across the indictment reflects the network's reach into multiple practice groups at multiple institutions simultaneously. The case speaks directly to the fundamental duty of confidentiality that underpins attorney-client privilege and the obligations of legal professionals handling material non-public information (MNPI) in transactional contexts. In the UK and EU, equivalent conduct would engage the Market Abuse Regulation (MAR) and the criminal offence of insider dealing under the Criminal Justice Act 1993. The US prosecution will generate immediate compliance reviews across transactional law firms globally, with London offices of affected firms likely to face questions from the FCA and their own ethics committees.

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