A new securities class action lawsuit filed against Endava plc, a technology consulting and digital transformation company that has promoted its transition to an “AI-native” business model, represents the 28th AI-related securities class action lawsuit filed in 2026. The lawsuit also raises an increasingly important question in the evolving AI-related litigation landscape: what makes a securities suit “AI-related”?
Continue Reading Endava Hit with Latest AI-Related Securities SuitThis past week, I was on assignment for The D&O Diary in Toronto and New York, where I participated in a PLUS panel, led an educational session for The Bridge, and delivered a guest lecture at Columbia University.
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The D&O Diary has been closely following the rise in securities class actions filed in 2026 stemming from alleged market manipulation. A recently filed securities class action lawsuit against Datavault AI Inc. arises from what plaintiffs characterize as a stock-promotion campaign built around artificial intelligence, blockchain technology, quantum computing, and data-monetization opportunities. Formerly known as WiSA Technologies, Inc., the company rebranded following its acquisition of intellectual-property assets from Data Vault Holdings Inc. and promoted a business model centered on data exchanges, high-performance computing, and technology licensing.
The September 25, 2026, complaint also builds upon allegations asserted in a securities suit filed against the company a month earlier by extending the class period, adding additional corrective disclosures, and incorporating allegations concerning liquidity, financing activities, and going-concern issues. As discussed below, the Datavault AI lawsuit underscores how D&O exposure can emerge when optimistic statements about growth prospects and financing opportunities are later followed by disclosures concerning liquidity challenges and financial performance.
Continue Reading Datavault AI Hit with Market-Manipulation-Related Securities Suit
As we have detailed in prior posts (most recently here), one of the key securities class action litigation filing trends this year has been the emergence of a host of securities suits alleging various types of market manipulation, including, in particular pump-and-dump schemes. In the latest example of this trend, on September 10, 2026, a plaintiff shareholder filed a securities lawsuit against the Singapore-based Ryde Group (RYDE) in a complaint alleging that the defendants engaged in a pump and dump scheme. This new lawsuit is the 15th market manipulation complaint to be filed so far this year.
Continue Reading New Market Manipulation-Related Securities Suit Filed Against Ryde Group
As we have noted on this site in recent years, privacy-related issues have been and remain a significant potential source of D&O risk and liability exposure. In the latest example of the ways that privacy-related concerns can translate into D&O claims, a plaintiff shareholder has filed a shareholder derivative lawsuit against the board and controlling shareholders of company Alphabet alleging that the defendants violated their fiduciary duties by failing to take steps to protect the company from over $4.5 billion in fines, penalties, and settlements arising from alleged privacy violations. A copy of the redacted public version of the September 22, 2026, complaint can be found here.
Continue Reading Alphabet Board Hit with Privacy-Related Follow-On Derivative Lawsuit
In our recent round-up of the top D&O stories so far this year, one of the top developments in 2026 we noted is the growing amount of AI-related D&O litigation. The AI-related litigation trend has continued to develop, as new AI-related lawsuits continue to be filed. In recent days, plaintiffs’ lawyers have filed two further AI-related securities class action lawsuits, first, against the Chinese Internet company Baidu, and, separately, against the AI-powered Internet advertising firm AppLovin. Both new lawsuits are based on AI-washing type allegations. The new lawsuit against Baidu also reflects the surging levels of securities litigation this year involving Chinese companies, as discussed further below.
Continue Reading AI-Related Securities Suit Filings Continue to Surge
The D&O Diary has been following the evolving litigation and management liability issues arising from the Trump Administration’s use of the International Emergency Economic Powers Act (IEEPA) to impose tariffs, the subsequent judicial decisions invalidating those tariffs, and the wave of refund litigation that has followed. As these developments have unfolded, tariff-related litigation has expanded beyond refund actions and shareholder claims to include consumer lawsuits alleging that companies improperly passed tariff costs on to customers.
One recent example is the litigation filed against Levi Strauss & Co. (Levi’s) in California and Louisiana. The allegations against Levi’s reflect the continued filing of tariff-related claims at a time when the scope and applicability of U.S. tariffs remain in flux. Although the tariffs imposed under IEEPA were invalidated by the Supreme Court, other tariffs and tariff-related trade measures remain in effect, including recent U.S. tariffs on Canadian imports and Canada’s corresponding countermeasures. These continuing trade actions demonstrate how rapidly changing tariff policies can create significant challenges for corporate governance, disclosure practices, and risk management.
Continue Reading Tariffs and the Continuing Wave of “Double Recovery” Consumer Class Actions
In the following guest post, Chris Mosley and John Orr discuss the findings from the 2026 North America edition of the Global Directors’ and Officers’ Survey, developed by Willis, a WTW business, in collaboration with Reed Smith LLP. As the survey results show, cyber risk remains the leading concern for directors and officers in North
As we have noted on this site, the increasing number of AI-related corporate and securities lawsuit filings is one of the most important recent developments in the world of D&O liability and insurance. Among the AI lawsuits is a particular category of claims involving allegations against AI infrastructure companies. By way of example, last week, two AI infrastructure companies were hit with securities suits alleging that the companies overstated their business opportunities arising from providing infrastructure to support the burgeoning AI build-out. As discussed further below, these AI infrastructure lawsuits represent their own category of AI-related suit filings.
Continue Reading AI Infrastructure Companies Hit with Securities Suits
Over the past year, market-manipulation lawsuits have become a growing feature of the securities litigation landscape, with plaintiffs targeting alleged spoofing, short-selling, pump-and-dump schemes, and other trading-related misconduct. The latest such case, filed on July 31, 2026, in the Middle District of Florida, names hedge fund Pentwater Capital Management and its founder, Matthew Halbower, as defendants (Pentwater SCA). The complaint alleges that they manipulated the market for Avis Budget Group (Avis) shares by orchestrating a short squeeze and then selling into the resulting price spike.
Unlike pump-and-dump securities suits premised on allegedly false or misleading statements, the Pentwater SCA is based on the defendants’ trading activity itself. The lawsuit arguably represents an example of a growing trend in market-manipulation-related securities class action litigation while underscoring an increasingly important issue for D&O underwriters: securities litigation risk arising not from disclosure deficiencies, but from market-structure and trading-related factors capable of driving extreme stock-price volatility.
A copy of the Pentwater SCA can be found here.
Continue Reading Short Squeeze Lawsuit Filed Against Pentwater Capital