Stock market lawsuits in Q2 2026 were defined by two unanimous and near-unanimous Supreme Court rulings that shifted the balance of power in securities enforcement, final approval of several of the largest class action settlements in recent memory, a sweeping 21-defendant SEC insider trading case, and fresh stock-drop suits against Grocery Outlet and Simply Good Foods. Below is what happened, who it affects, and the deadlines investors need to know.
Two Supreme Court Rulings That Changed Securities Law This Quarter
SEC Can Seek Disgorgement Without Proving Investor Losses
On June 4, 2026, the Court unanimously ruled in Sripetch v. SEC that the SEC does not have to prove investors lost money before forcing a wrongdoer to hand over ill-gotten profits. Justice Gorsuch, writing for the Court, explained that disgorgement is measured by the defendant’s gain, not the plaintiff’s loss.
Ongkaruck Sripetch had been ordered to pay over $2 million in disgorgement after a consent judgment tied to fraudulent penny stock schemes. He argued the SEC couldn’t collect without showing investor losses. The Ninth Circuit rejected that argument, and the Supreme Court affirmed, resolving a circuit split.
Justice Thomas concurred in the outcome but wrote separately to argue that because Congress has now codified disgorgement as a statutory remedy, it should be treated as a legal rather than equitable one, which would entitle defendants to jury trials in future cases. That view didn’t carry the day, but it flags a possible future fight over the procedural rights of SEC enforcement targets.
For investors and companies, the practical takeaway is straightforward: disgorgement stays one of the SEC’s most potent tools, and a common defense argument has been closed off.
No Private Lawsuits Under the Investment Company Act
A week later, on June 11, 2026, the Court issued a 6-3 decision in FS Credit Opportunities Corp. v. Saba Capital Master Fund, holding that Section 47(b) of the Investment Company Act does not give private parties the right to sue for rescission of contracts that allegedly violate the Act. Justice Barrett wrote for the majority, joined by Chief Justice Roberts and Justices Thomas, Alito, Gorsuch, and Kavanaugh. Justices Kagan, Sotomayor, and Jackson dissented.
The ruling reversed the Second Circuit and aligned it with the Third and Ninth Circuits, which had already reached the same conclusion. Enforcement of the Investment Company Act now rests primarily with the SEC. Investors who believe a fund has violated the statute have lost a route to court.
Major Settlements Reaching Final Approval
Several of the largest securities class action settlements in years hit key milestones this quarter. If you held shares in any of these companies during the class period, the deadlines below already apply.
Rivian Automotive: $250 Million (Final Approval)
On May 20, 2026, Judge Josephine L. Staton granted final approval to the $250 million cash settlement in the Rivian securities class action. Lead plaintiff Sjunde AP-Fonden (AP7) alleged that Rivian’s 2021 IPO documents contained material misrepresentations about the true manufacturing costs of its R1 vehicle line and failed to disclose coming price increases. The class period runs from November 10, 2021, through June 8, 2022. The claim filing deadline was April 20, 2026, with Verita Global serving as claims administrator.
Celgene: $239 Million (Approved)
The District of New Jersey entered judgment approving the $239 million settlement in In re Celgene Corporation Securities Litigation on May 8, 2026. It covers investors who purchased Celgene common stock between April 27, 2017, and April 27, 2018. The claim filing deadline was April 13, 2026.
DiDi Global: $740 Million (Final Hearing This Quarter)
Judge Lewis A. Kaplan in the Southern District of New York gave preliminary approval to the proposed $740 million settlement in In re DiDi Global Inc. Securities Litigation on January 12, 2026, and set the final settlement hearing for June 16, 2026. The claim filing deadline was April 6, 2026. Plaintiffs alleged DiDi and its underwriters made false and misleading statements in connection with the company’s June 30, 2021, IPO. The class period runs just three weeks, from June 30 through July 21, 2021, and the estimated average recovery is roughly $1.84 per affected American Depositary Share.
Fidelity National Information Services: $210 Million (Preliminary Approval)
A $210 million settlement in the FIS securities class action received preliminary approval in the Middle District of Florida. The suit, filed in October 2024 by institutional investors including the Nebraska Investment Council and North Carolina’s retirement systems, alleged that FIS and its executives made materially misleading statements about the company’s 2019 acquisition of Worldpay. The claim deadline is May 28, 2026, and the final settlement hearing is set for July 9, 2026. Estimated recovery is about 42 cents per damaged share before fees.
Mylan: $60 Million (Deadlines Still Open)
The $60 million settlement in In re Mylan, N.V. Securities Litigation has a claim filing deadline of July 10, 2026, with the settlement hearing scheduled for June 15, 2026, in the Western District of Pennsylvania.
The SEC’s Biggest Enforcement Case of the Quarter
On May 6, 2026, the SEC charged 21 individuals in what it called a wide-reaching insider trading scheme. The case, filed in the District of Massachusetts as SEC v. Nicolo Nourafchan, et al., alleges that Nourafchan, a mergers and acquisitions attorney in Los Angeles, and Robert Yadgarov orchestrated the misappropriation of material nonpublic information from multiple global law firms about more than a dozen pending corporate transactions between 2018 and 2024.
According to the SEC, Nourafchan and Yadgarov tipped information to other participants in exchange for kickbacks from trading profits, or passed it to intermediaries who further tipped traders. The scheme allegedly generated millions of dollars in illicit profits. The SEC is seeking injunctive relief, disgorgement with prejudgment interest, and civil penalties. All 21 defendants also face parallel criminal charges filed by the U.S. Attorney’s Office for the District of Massachusetts.
The case fits the SEC’s stated 2026 enforcement direction under Chairman Atkins, which officials have described as a “back to basics” approach focused on fraud, retail investor protection, and cases against individuals. In the first half of fiscal year 2026, 80% of the agency’s 60 standalone enforcement actions included charges against at least one individual. The agency has also stepped back from crypto enforcement, dismissing seven previously filed crypto cases, and ended its “off-channel communications” recordkeeping campaign.
New Securities Fraud Lawsuits Filed This Quarter
Grocery Outlet Holding Corp.
Kessler Topaz Meltzer & Check filed Jones v. Grocery Outlet Holding Corp. in the Northern District of California. The complaint alleges that Grocery Outlet’s financial and operational growth was artificially supported by rapid store openings, that the company couldn’t meet its own guidance, and that it ultimately had to announce the closure of 36 locations and take significant asset write-downs.
On March 5, 2026, the day after those disclosures, Grocery Outlet’s stock fell 27.9%, dropping $2.45 to close at $6.34. The class period runs from August 5, 2025, through March 4, 2026. The lead plaintiff deadline was May 15, 2026.
Simply Good Foods (SMPL)
Multiple law firms opened securities fraud investigations into The Simply Good Foods Company after the stock fell 18% on April 9, 2026. The company reported fiscal Q2 2026 net sales of $326 million, a 9.4% year-over-year decline, and recorded a $249 million impairment charge while cutting full-year 2026 revenue guidance to a decline of 7% to 10%. Management had reaffirmed flat-to-slight-growth guidance on its January 2026 earnings call.
The investigations, which have not yet resulted in a filed lawsuit, focus on whether management concealed margin deterioration and problems with the expansion of its Quest and OWYN-branded protein products, including issues with product distribution, quality, and marketing execution.
The Bigger Picture: Fewer Cases, Bigger Stakes
The individual cases of Q2 2026 sit within a broader pattern. In 2025, approximately 207 new federal securities class actions were filed, down from around 222 to 226 in 2024. But the financial magnitude of the cases that were filed climbed sharply. Disclosure Dollar Loss, a measure of the stock price decline associated with alleged fraud, reached an all-time record of $694 billion in 2025, up from $429 billion in 2024. Maximum Dollar Loss hit $2.86 trillion, a 75% increase and the third-highest level ever recorded.
So-called mega filings drove those numbers, accounting for 89% of total Maximum Dollar Loss and 81% of total Disclosure Dollar Loss. Analysts at Cornerstone Research said the jump in dollar-loss metrics “suggests large future settlement values.”
Settlement data supports that view. Aggregate settlement value in 2025 was $2.9 billion, a 25% decline from 2024’s inflation-adjusted $3.9 billion, but the median settlement reached $17 million, a 10-year high and a 21% increase from the prior year. The top 10 settlements alone accounted for $1.7 billion, or 59% of the year’s total. Healthcare and technology companies made up 57% of new filings, cases citing missed earnings guidance hit a five-year high at 43% of all filings, and crypto-related filings rose 75% to 14 cases.
Fewer lawsuits. Larger dollars per lawsuit. For any investor tracking the Q2 2026 docket, that is the pattern the individual cases fit into.