Rosen files class action over Avis securities allegations

Rosen Law Firm said Aug. 10, 2026, that it filed a class action lawsuit on behalf of purchasers of Avis Budget Group securities, including buyers of Avis common stock to cover a short position. The firm accused Pentwater Capital Management LP and its founder Matthew Halbower of manipulating the market for Avis securities.

The notice says the case covers purchases made between Feb. 20, 2025, and April 21, 2026. It says investors who bought Avis securities during that period may be entitled to compensation through a contingency fee arrangement, and it sets a Sept. 29, 2026, deadline for investors who want to ask the court to serve as lead plaintiff.

Rosen says Pentwater was one of Avis’s largest shareholders and, as of March 2026, held an approximately 51% total economic interest in the company through stock and cash-settled swaps.

According to the notice, the complaint alleges that Pentwater and Halbower orchestrated a scheme to manipulate the market for Avis securities. The notice also says Pentwater’s stock purchases during the class period caused unusual volatility and a short squeeze, which increased the value of Pentwater’s holdings.

The notice identifies Halbower as Pentwater’s CEO, CIO and founder. It says no class has been certified yet, and that investors are not represented by counsel unless they retain one. It also says investors may choose their own counsel or do nothing at this stage.

Rosen’s notice is an attorney advertising release, and it says investors who purchased Avis securities during the class period may be eligible to pursue compensation if they are included in the case. The court will next consider any motion for lead-plaintiff status filed by the Sept. 29 deadline.

Sources

• PR Newswire: Rosen Law Firm notice on Avis Budget Group securities lawsuit

Editorial note: This article was prepared with AI assistance and includes source attribution for reader review.