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Updated September 26, 2026
A federal securities class action has been filed against Pentwater Capital Management LP and its founder, Matthew Halbower, over allegations that they manipulated the market for Avis Budget Group Inc. (NASDAQ: CAR). The lawsuit, announced Sept. 25, is open to investors who bought or otherwise acquired Avis securities between Feb. 20, 2025 and Apr. 21, 2026. Those investors have until Sept. 29 to ask the court to appoint them as lead plaintiff.
The complaint was filed in the U.S. District Court on behalf of all purchasers of Avis stock or other securities during the defined class period. Its central allegations are that Pentwater, one of Avis's largest shareholders, held an economic interest equal to roughly 51% of the company's outstanding shares through a combination of common stock and cash-settled equity swaps. The swap positions, in particular, allowed the fund to accumulate economic exposure without necessarily crossing conventional disclosure lines.
The defendants are then accused of aggressive purchases of Avis stock that drove up the price and triggered a short squeeze. Short sellers, facing losses on their bearish bets, were forced to cover by buying shares, which pushed the stock even higher. The plaintiffs say the defendants intentionally created this artificial demand to make the company's share price appear market-driven and, at the same time, boost the value of Pentwater's existing stake.
All of this, the complaint says, rendered the defendants' public statements during the class period materially false and misleading. Shareholders who bought at inflated prices are now seeking damages under federal securities laws.
One aspect that distinguishes this case is the alleged use of cash-settled swaps. Unlike physically holding shares, a cash-settled swap gives a fund the economic upside of a security's price movement without involving an actual transfer of the stock. That structure can make it harder for other investors to see the true scale of a shareholder's exposure, since it may not show up in ways that traditional ownership filings do.
In this instance, the complaint contends, the swap position helped Pentwater hold the economic equivalent of more than half of Avis's outstanding stock while avoiding the visible footprint one might expect from such a large position. While swaps themselves are legal, the legal question here is whether the defendants had a duty to disclose their strategy and, critically, whether they used that hidden position to engineer a market move at the expense of others.
The situation is different in kind from ordinary hedge-fund activity. It echoes, in rudimentary form, the short-squeeze dynamics seen in 2021's GameStop episode, but with a twist: the upward pressure is alleged to have been driven by one institutional investor rather than a loose network of retail traders. Because of that, the case could sharpen the conversation about money managers using derivative-based positions to influence stock prices without full public disclosure.
In a securities class action, the court nearly always appoints a lead plaintiff to represent the class and guide the litigation. Under the Private Securities Litigation Reform Act, the investor with the largest financial interest who makes a timely request is usually given strong consideration. That request must be filed no later than Sept. 29, 2026.
Potential lead plaintiffs are not appointed automatically. A formal motion to the court is required. But investors who do not seek the lead role can still participate in any recovery. Federal class action law permits class members to share in relief without being named as the designated representative.
The firm leading the case, Bronstein, Gewirtz & Grossman, LLC, is working on a contingency-fee basis. That means class members pay no out-of-pocket costs. The firm advances the expenses of litigation and then, if successful, asks the court to award attorneys' fees and reimbursements, usually a percentage of the total recovery.
The firm has handled securities fraud and shareholder derivative cases across the country, with recoveries topping hundreds of millions of dollars. Founding partner Peretz Bronstein and client relations manager Nathan Miller are the contacts. They can be reached at 917-590-0911 or info@bgandg.com. A copy of the complaint is available at bgandg.com/CAR.
The Sept. 29 deadline is the immediate marker for anyone who bought Avis securities during the class period and wants to be considered for lead plaintiff. Reviewing the complaint and consulting the law firm are free steps that do not obligate an investor. Those who believe they lost money because of the alleged conduct should act quickly, as the window under federal securities laws is strict.
Attorney advertising. Prior results do not guarantee a similar outcome.
