SEC Charges 21 in Law-Firm Insider Trading Case
Federal regulators say confidential merger files became the raw material for a years-long trading ring.
Washington, D.C. - The Securities and Exchange Commission charged 21 people Wednesday in a civil insider-trading case that centers on confidential deal information allegedly taken from global law firms and used to trade around more than a dozen corporate transactions.
The SEC's complaint, filed in the U.S. District Court for the District of Massachusetts, names Nicolo Nourafchan, a Los Angeles mergers and acquisitions attorney, and Robert Yadgarov of Long Beach, New York, as alleged organizers of the scheme. The agency said the alleged conduct ran from 2018 through 2024 and produced millions of dollars in illicit trading profits.
The U.S. Attorney's Office for the District of Massachusetts announced parallel criminal charges against 30 individuals in what prosecutors called a global insider-trading scheme netting tens of millions in alleged illicit profits.
Why It Matters
The case puts law-firm deal security at the center of a capital-markets enforcement action. According to the SEC, the alleged edge was not research, public information, or risk-taking. It was material nonpublic information from pending client transactions before public announcements moved stock prices.
For public companies, that distinction matters. Law firms sit inside the transaction pipeline for mergers, acquisitions, financing deals, and corporate restructurings. If confidential files leak before a deal is announced, the immediate cost can be illegal trading profits, but the wider cost is higher compliance spending, tighter access controls, and reduced trust in the fairness of public markets.
The Story So Far
The SEC said in Press Release 2026-44 that it charged 21 individuals for alleged involvement in a decade-long insider-trading scheme that used information misappropriated from multiple global law firms. The agency said the case was brought by the Division of Enforcement's Market Abuse Unit.
According to the SEC's complaint, Nourafchan and Yadgarov allegedly coordinated a trading chain between 2018 and 2024. The complaint alleges that Nourafchan misappropriated material nonpublic information from his firm's clients tied to more than twelve pending corporate transactions.
The SEC said Nourafchan or Yadgarov allegedly tipped other participants, who either agreed to return part of their trading profits or passed the information to additional traders. The agency also said Nourafchan and Yadgarov allegedly recruited another corporate lawyer, who allegedly misappropriated information about additional deals and tipped it to them.
The complaint charges the defendants with violating the antifraud provisions of federal securities law. The SEC is seeking injunctions, disgorgement with prejudgment interest, and civil penalties.
The allegations have not been proven in court. The civil case will test the SEC's evidence on what information was accessed, who received it, when trades were placed, and whether the agency can tie profits to the alleged tips.
What's Happening Now
The SEC and federal prosecutors are pursuing the matter on parallel tracks. The civil case seeks monetary and conduct-based remedies. The criminal case, announced by the U.S. Attorney's Office in Massachusetts, exposes defendants charged by prosecutors to the higher burdens and potential penalties of criminal law.
The SEC said several agencies assisted its investigation, including the FBI, the Financial Industry Regulatory Authority, the Danish Financial Supervisory Authority, the United Kingdom Financial Conduct Authority, the Cyprus Securities and Exchange Commission, the Mauritius Financial Services Commission, and the Swiss Financial Market Supervisory Authority.
That list points to the enforcement problem alleged in the case. M&A information may begin inside a U.S. law-firm matter file, but trading accounts, communications, relatives, business associates, and brokerage records can cross borders. The SEC's public statement indicates the agency needed domestic market surveillance and foreign regulatory help to reconstruct the alleged chain.
The agency's theory also reaches beyond one tipper and one trade. According to the SEC, participants allegedly moved information through multiple levels of a tipping chain, with some traders allegedly kicking back part of their profits and others allegedly passing tips onward. That structure, if proven, would make the case about network enforcement as much as individual misconduct.
The Enforcement View
Regulators frame the case as a market-integrity action. Joseph G. Sansone, chief of the SEC Division of Enforcement's Market Abuse Unit, said the agency is focused on both the alleged source of the information and the downstream traders who allegedly used it.
"Today's action highlights the SEC's unwavering commitment to uncovering sprawling schemes, like the one alleged here, and holding individuals up and down the tipping chain accountable for their fraudulent conduct." - Joseph G. Sansone, Chief of the SEC Division of Enforcement's Market Abuse Unit
The SEC's complaint asks the court to order disgorgement, prejudgment interest, civil penalties, and injunctions. Those remedies are designed to strip alleged gains, add a financial penalty, and restrict future violations if the agency proves its case.
The Justice Department's parallel announcement raises the stakes. Prosecutors said they charged 30 individuals in a global insider-trading scheme that allegedly netted tens of millions in illicit profits. Criminal prosecutors must prove their charges beyond a reasonable doubt, a higher standard than the civil preponderance standard the SEC faces.
The Defense View
The defendants are entitled to contest every allegation. The SEC's complaint states the agency's claims, not findings by a judge or jury, and the criminal charges announced by federal prosecutors remain accusations unless proven in court.
Defense arguments in insider-trading cases often focus on knowledge, intent, and causation. In a case built around alleged tips, defense counsel can challenge whether a defendant knew the information was confidential, whether the information was material, whether the person traded because of the tip, and whether alleged profits are correctly calculated.
For lawyers named in the complaint, the professional stakes are separate from the market case. Bar discipline, employment consequences, client claims, and reputational harm can follow allegations involving client confidences, even before the securities case is resolved. Those consequences make the court record, not press-release language, the venue that matters.
The Compliance View
For law firms and public-company legal departments, the SEC's allegations read like a controls test. Deal teams often include lawyers, bankers, consultants, printers, accountants, executives, and board advisers. Each additional person creates another access point for material nonpublic information.
The alleged scheme described by the SEC centers on pending corporate transactions. That category is especially sensitive because deal announcements can quickly change stock prices for acquirers, targets, and companies in the same sector. When trading occurs before a transaction becomes public, regulators often compare account activity, communications, deal calendars, and access logs.
The firms named in the SEC's public release are not the focus of the charges. The broader business issue is whether professional-services firms can keep confidential client data inside authorized deal teams. If clients believe transaction files are vulnerable, firms can face demands for tighter information barriers, more monitoring, more restricted document systems, and more costly internal investigations after unusual trading appears.
Economic Implications
Insider trading around pending M&A attacks price discovery. In a normal market, investors compete over public information, research, valuation, and risk. According to the SEC, the alleged traders had access to confidential deal information before public announcements, which would let them position ahead of price-moving events without bearing the same information risk as ordinary investors.
The cost is not limited to the alleged illicit profits. Public companies pay law firms to protect transaction strategy, timing, financing plans, and board decisions. If regulators prove that deal information moved through a trading chain for years, companies and law firms are likely to spend more on access controls, communications monitoring, insider lists, personal-trading reviews, and post-announcement trade surveillance.
The case also shows why civil and criminal enforcement often move together in market-abuse matters. The SEC can seek disgorgement and penalties in civil court, while federal prosecutors can use criminal tools against defendants they charge. Cross-border cooperation adds another layer because alleged trades, accounts, or communications can sit outside one regulator's jurisdiction.
By the Numbers
21: Individuals charged in the SEC civil case, according to SEC Press Release 2026-44.
30: Individuals charged in the parallel criminal case announced by the U.S. Attorney's Office for the District of Massachusetts.
2018 to 2024: Period during which the SEC says Nourafchan and Yadgarov allegedly orchestrated the scheme.
More than twelve: Pending corporate transactions tied to information allegedly misappropriated from Nourafchan's firm clients, according to the SEC.
Millions: The amount of alleged illicit profits cited by the SEC in the civil action.
What People Are Saying
"The Securities and Exchange Commission today charged 21 individuals for their alleged involvement in a decade-long insider trading scheme that used information misappropriated from multiple global law firms and resulted in millions of dollars in illicit profits." - SEC Press Release 2026-44
"The complaint alleges that Nourafchan misappropriated material nonpublic information from his firm's clients pertaining to more than twelve pending corporate transactions." - SEC Press Release 2026-44, summarizing the SEC complaint
"Today's action highlights the SEC's unwavering commitment to uncovering sprawling schemes, like the one alleged here, and holding individuals up and down the tipping chain accountable for their fraudulent conduct." - Joseph G. Sansone, Chief of the SEC Division of Enforcement's Market Abuse Unit
"Thirty individuals charged in global insider trading scheme netting tens of millions in illicit profits." - U.S. Attorney's Office for the District of Massachusetts announcement headline, May 6, 2026
The Big Picture
Photo by Beyond My Ken, via Wikimedia Commons (CC BY-SA 4.0)
The SEC's case will now move through federal court in Massachusetts, where the agency must prove its civil claims and defendants can challenge the allegations. The parallel criminal case announced by the U.S. Attorney's Office will proceed under a separate burden of proof and separate procedural rules.
For capital-markets participants, the case is a reminder that deal confidentiality is not just a legal ethics issue. It is part of the infrastructure that lets public companies negotiate transactions before investors trade on the news. Regulators are treating the alleged law-firm leak as a market-abuse case with a cross-border footprint.
The next markers are court filings, defendant responses, any settlement notices, and whether regulators identify additional controls failures around deal access. Until a court resolves the claims, the charges remain allegations.
