Former Wachtell Attorney Turned Banker Linked to Insider Trading Investigation

On May 6, 2026, federal prosecutors in Boston unsealed two indictments charging 30 people in what authorities described as a "vast, decade-long" insider trading conspiracy that extracted confidential deal information from six of America's most prestigious law firms [1]. Within days, reporting identified the unnamed "CC-2" in one of those indictments — a former associate at Wachtell, Lipton, Rosen & Katz who later rose to general counsel and chief operating officer at boutique investment bank LionTree — as Avi Sutton [2][3].

Sutton has not been charged. But his alleged role as a tipper of material nonpublic information, beginning in 2014 while he was a junior associate and continuing after he crossed into banking in 2022, makes him a central figure in a case that strikes at the heart of Big Law's self-policing model and the porous boundary between legal practice and finance.

The Anatomy of the Scheme

The alleged conspiracy was orchestrated by two Yale Law School classmates: Nicolo Nourafchan, a corporate M&A attorney who cycled through Sidley Austin, Latham & Watkins, Cleary Gottlieb, and Goodwin Procter; and Robert Yadgarov, a New York personal injury lawyer who served as the scheme's operational hub [4][5].

Prosecutors allege that between 2014 and 2024, Nourafchan and Yadgarov recruited attorneys and other insiders at major law firms to serve as sources of confidential deal intelligence, paying kickbacks of "up to hundreds of thousands of dollars in cash" [1]. They then distributed tips to a layered network of traders and middlemen who executed trades through shell companies, offshore accounts, and brokerage accounts in countries including Russia [6].

The operation relied on tradecraft designed to evade detection: burner phones, coded language referring to deals as "trips" and "holidays," and in-person meetings to avoid creating a digital trail [6][7].

A third attorney, Gabriel Gershowitz — who worked at Weil Gotshal before moving to Willkie Farr & Gallagher — has separately pleaded guilty and agreed to cooperate with prosecutors [8].

Sutton's Alleged Role: From Associate to Tipper

According to the indictment, CC-2 — identified by multiple news outlets as Sutton — began providing tips on forthcoming M&A deals to the conspiracy's leaders in 2014, roughly one year after joining Wachtell as an associate [2][3].

The deals allegedly tipped by Sutton while at Wachtell include some of the most high-profile transactions of the past decade:

• Tim Hortons / Burger King (August 2014): The $11 billion merger that created Restaurant Brands International. Prosecutors allege tips preceded the public announcement by days [2][9].
• Actelion / Johnson & Johnson: The $30 billion acquisition of the Swiss biotech company [9].
• C.R. Bard: The medical device company acquired by Becton Dickinson [9].
• Qualcomm: The semiconductor giant that was the target of Broadcom's hostile bid [9].
• Express Scripts / Cigna: The $54 billion health insurance merger [9].

After leaving Wachtell in 2022 and joining LionTree as general counsel and COO, Sutton allegedly continued tipping. Prosecutors cite an August 2023 tip concerning a potential deal involving Adevinta, the eBay-backed online classifieds company [2][3].

The breadth of this alleged activity — spanning Sutton's entire tenure at Wachtell and extending into his banking career — creates what legal experts describe as one of the longest continuous windows of material nonpublic information exposure in any modern insider trading prosecution.

The Money Trail

The overall scheme generated "tens of millions of dollars" in illicit profits, according to prosecutors [1]. While the indictment does not attribute specific profit figures to Sutton individually, it provides granular detail on certain trades:

• Trades ahead of the iRobot / Amazon deal in 2022 generated approximately $1.7 million for co-conspirators. Nourafchan accessed confidential deal materials through his firm's document management system while on leave — meaning he was not staffed on the deal [6][7].
• Trades on the SailPoint acquisition, a Goodwin Procter client, generated roughly $300,000 in profits [6].
• The Momenta Pharmaceuticals / Johnson & Johnson deal yielded $90,000 in trading profits, with Nourafchan receiving a $9,765 kickback [6].
• Over $6.3 million was paid to Yadgarov, who distributed funds among co-conspirators [6].

The SEC's parallel civil complaint names 21 individuals and alleges violations of Rule 10b-5 under the Securities Exchange Act of 1934 [4].

Source: SEC Enforcement Actions

Data as of May 9, 2026CSV

The Legal Framework: O'Hagan and the Misappropriation Theory

The legal theory underlying the case against Sutton — and the broader prosecution — traces directly to the Supreme Court's 1997 decision in United States v. O'Hagan [10].

James O'Hagan was a partner at Minneapolis law firm Dorsey & Whitney. When the firm was retained by Grand Metropolitan to explore a takeover of Pillsbury, O'Hagan bought Pillsbury stock and options, generating $4.3 million in profits when the deal was announced [10]. The Supreme Court, in an opinion by Justice Ruth Bader Ginsburg, held that O'Hagan could be liable under the "misappropriation theory" of insider trading: a corporate outsider who breaches a duty of trust and confidence to the source of information — here, his law firm and its client — violates Section 10(b) by trading on that information [10][11].

The misappropriation theory is particularly significant for attorneys who later move to banking roles. Under O'Hagan, a lawyer's fiduciary duty to maintain client confidentiality does not automatically expire upon departure from the firm. If a former attorney trades on — or tips others about — confidential information obtained during their tenure, they remain exposed to liability so long as the information was material and nonpublic at the time of the trade [11].

For Sutton, this creates a dual exposure: liability for tips allegedly provided while at Wachtell (a straightforward misappropriation case) and for the Adevinta tip allegedly provided while at LionTree, where he may have had access to deal information through a different channel entirely.

Compliance Gaps: How Did This Go Undetected?

The case has prompted pointed questions about internal controls at both the law firms and LionTree.

Law firms are not regulated by the SEC or FINRA in the same way that broker-dealers and investment advisers are. They are not required to maintain restricted lists, mandate pre-clearance of personal securities trades, or implement automated surveillance of employee trading activity [12][13]. Most major firms do have policies informing attorneys that trading on nonpublic information is prohibited, but enforcement of those policies typically relies on self-reporting rather than systematic monitoring.

The indictment reveals a specific and troubling vulnerability: in at least one instance, Nourafchan accessed confidential deal documents on his firm's case management system for transactions on which he was not staffed, using keyword searches in preview or read-only mode [6][7]. This suggests that access controls at some firms did not restrict attorneys from viewing deal files outside their assigned matters.

Wachtell has stated that "the responsible party left Wachtell Lipton over four years ago" and that "there are no allegations of wrongdoing against the firm" [2]. The firm has cooperated with the U.S. Attorney's office.

LionTree, for its part, placed Sutton on leave immediately after the indictments were unsealed and stated that he is "no longer active at the firm." LionTree identified itself as a victim, noting there are no allegations of wrongdoing against the company [2][3].

But the question remains: LionTree hired Sutton as its general counsel and chief operating officer — the person responsible for, among other things, compliance oversight. If the allegations are accurate, the individual charged with safeguarding the bank's information barriers was simultaneously breaching them.

SEC Enforcement in Context

The Nourafchan case is the largest insider trading prosecution involving law firm attorneys in U.S. history by number of defendants. The scale dwarfs prior cases.

Source: SEC Annual Reports

Data as of Jan 1, 2026CSV

The SEC filed 456 total enforcement actions in fiscal year 2025, down from a peak of 784 in fiscal year 2023 [14]. But the agency has signaled that insider trading involving M&A professionals remains a priority. The coordinated nature of this case — involving the FBI, FINRA, and financial regulators in Denmark, the United Kingdom, Cyprus, Mauritius, and Switzerland — reflects an increasingly international enforcement apparatus [1][4].

Two defendants are considered fugitives, believed to be in Russia and Israel [7]. Nineteen of the 30 charged individuals were arrested on the day the indictments were unsealed [1].

The Attorney-to-Banker Pipeline: Conflict or Competence?

The Sutton case has reignited debate about the career path from Big Law M&A practice to investment banking — a transition that has become increasingly common as banks seek professionals with deep transaction experience.

Critics argue that attorneys who move to the buy side carry with them an inventory of confidential deal knowledge that creates inherent conflicts of interest. Even if they do not trade on specific tips, their understanding of deal patterns, client strategies, and market dynamics is informed by years of access to material nonpublic information.

But defenders of the pipeline point out that the vast majority of attorney-to-banker transitions occur without incident. The knowledge that M&A lawyers accumulate — understanding of deal structures, regulatory frameworks, negotiation tactics — constitutes legitimate professional expertise, not inside information. Prohibiting or heavily restricting lateral movement would penalize competence and reduce talent mobility in ways that could harm both the legal and financial sectors.

The distinction, under current doctrine, turns on specificity. An attorney who carries a general understanding that Company X tends to pursue acquisitions in a particular sector is using market knowledge — legal and unremarkable. An attorney who tells a trader that Company X will announce a specific acquisition next Tuesday is transmitting material nonpublic information — a federal crime under O'Hagan [10][11].

The difficulty, as this case illustrates, is that the line between the two is policed primarily through self-restraint and after-the-fact enforcement rather than structural safeguards.

Potential Consequences for Wachtell

Wachtell, Lipton, Rosen & Katz occupies a singular position in American corporate law. The firm regularly tops the Am Law rankings in revenue per lawyer and has advised on some of the largest transactions in history. Its reputation rests on the premise that clients can entrust it with their most sensitive deal information.

If the allegations against Sutton are substantiated, several consequences become plausible:

Client liability exposure: Companies whose deal information was allegedly leaked could pursue civil claims against Wachtell for breach of fiduciary duty and breach of contract. The damages could be measured by the trading profits generated from leaked information, plus any harm to the companies' market positions caused by front-running of their deals.

Regulatory scrutiny: While law firms are not directly regulated by the SEC, the case could accelerate calls for mandatory compliance programs at firms that regularly handle M&A transactions. The American Bar Association's Model Rules of Professional Conduct impose duties of confidentiality, but enforcement mechanisms vary by state and lack the systematic monitoring capabilities of financial regulators [12].

Alumni monitoring: No major law firm currently monitors the trading activity of former attorneys. The notion that Sutton allegedly began tipping as a junior associate and continued for a decade — through his departure and into a new career — without detection suggests that post-departure risk is a blind spot in the current compliance framework.

Institutional precedent: There is limited precedent for holding law firms institutionally responsible for post-departure misappropriation by former attorneys. The O'Hagan decision focused liability on the individual, not the firm. But if evidence emerges that Wachtell's internal systems were inadequate to prevent or detect the alleged conduct during Sutton's tenure, the calculus could shift.

The Tippee Network

The breadth of the alleged conspiracy extends well beyond the attorneys who served as sources. The 30 defendants include traders, middlemen, and downstream tippees who executed trades through a variety of vehicles [1][4].

Prosecutors allege the network used shell companies, offshore brokerage accounts — including accounts at Russian brokerages — and accounts controlled by family members and associates to obscure the beneficial ownership of trades [6]. The international dimension is underscored by the involvement of financial regulators in five countries [1].

The indictment does not identify any institutional investors, hedge funds, or family offices among the alleged tippees. The trading appears to have been conducted through personal and entity accounts controlled by individuals within the conspiracy's social network — including, according to reporting, family members, friends, and even personal stylists of the alleged ringleaders [6].

This distinguishes the case from insider trading prosecutions like the Galleon Group scandal, which involved institutional hedge fund trading. But the total profits — tens of millions of dollars across nearly 30 deals over a decade — indicate a scheme of significant scale even if conducted through retail-level accounts.

What Happens Next

Sutton's status as an unindicted co-conspirator rather than a charged defendant leaves his legal exposure uncertain. Prosecutors may be seeking his cooperation, or they may be building a separate case. His silence — he has not responded to press inquiries — offers no clues [2][3].

For Nourafchan, Yadgarov, and the 28 other charged defendants, the path forward involves criminal proceedings in the District of Massachusetts and parallel SEC civil litigation. The charges include securities fraud, conspiracy, money laundering, obstruction of justice, and making false statements — carrying potential sentences measured in decades [1][7].

For Big Law, the case is a stress test. The firms named as victims — Wachtell, Sidley Austin, Latham & Watkins, Goodwin Procter, Weil Gotshal, and Willkie Farr — collectively advise on trillions of dollars in annual deal volume. The revelation that attorneys at these firms were allegedly selling deal intelligence for cash, sometimes while not even staffed on the relevant transactions, demands a reckoning with the adequacy of internal controls that the profession has long treated as sufficient [6][7][12].

The answer may not be comfortable: law firms have resisted the compliance infrastructure — restricted lists, automated trading surveillance, mandatory pre-clearance — that is standard at investment banks and broker-dealers. This case suggests that resistance has a cost.