AEVEX Corp. Faces Securities Fraud Lawsuit Over IPO Lock-Up Breach

The litigation, Rosenberg v. AEVEX Corp., centers on accusations that the company and its primary shareholder, Madison Dearborn Partners, LLC, orchestrated a secondary public offering shortly after the initial April 2026 launch. While the IPO documents promised a 180-day lock-up period to prevent insiders from offloading shares, the defendants allegedly waived these restrictions to facilitate a $207.9 million exit for Madison Dearborn. This move effectively allowed the private equity firm to recoup capital while the company itself received no proceeds from the secondary offering.

Market response to the disclosure was immediate. Shares of the military technology contractor fell approximately 16% on June 2, 2026, followed by an additional 7% decline on June 5. Investors seeking to serve as lead plaintiff in the class action have until October 20, 2026, to file with the court. The law firm Kessler Topaz Meltzer & Check, LLP is currently providing case evaluations for affected shareholders interested in pursuing recovery options.