On May 6, 2026, the Securities and Exchange Commission announced charges against 21 individuals in connection with an alleged decade-long insider trading scheme that prosecutors…
On May 6, 2026, the Securities and Exchange Commission announced charges against 21 individuals in connection with an alleged decade-long insider trading scheme that prosecutors say was orchestrated by M&A attorney Nicolo Nourafchan. According to the SEC, Nourafchan misappropriated material nonpublic information from his firm's clients relating to more than a dozen pending corporate transactions, then funneled that information to a network of tippees who traded ahead of public announcements. The U.S. Attorney's Office for the District of Massachusetts has announced parallel criminal charges, underscoring a coordinated civil and criminal response targeting attorneys and downstream recipients who exploit privileged access to deal information.
The enforcement action is a pointed reminder that law firms occupy a uniquely sensitive position in the capital markets. M&A practitioners routinely handle material nonpublic information across overlapping client matters, and the longer such information is concentrated in the hands of a small group of attorneys, the greater the exposure if internal controls falter. The decade-long span alleged here suggests that the conduct evaded detection across multiple deals and counterparties, which will likely sharpen regulator attention on how firms identify and respond to unusual trading patterns connected to their personnel.
The SEC is seeking injunctive relief, disgorgement, and civil penalties. Beyond the immediate defendants, the case signals heightened expectations for the design and operation of information barriers within law firms. Firms should consider revisiting deal team segregation protocols, restricted lists and watch lists, personal trading preclearance and reporting requirements for attorneys and staff with access to client MNPI, and the cadence and content of insider trading compliance training. Periodic auditing of access logs and document management systems, as well as clear escalation paths for suspected misuse, are increasingly viewed as baseline rather than aspirational practices.
For corporate clients, the matter also highlights the importance of diligence around outside counsel's confidentiality infrastructure, particularly when engaging counsel on transactions where leaks could materially affect pricing or deal certainty. Engagement letters, conflicts processes, and information-handling representations may warrant renewed scrutiny.
This article is provided for general informational purposes only and does not constitute legal advice. Clients facing specific questions regarding insider trading compliance, information barriers, or related enforcement risk should seek tailored counsel suited to their particular circumstances.