The lawsuit, Rosenberg v. AEVEX Corp., claims that the company, its private equity owner Madison Dearborn Partners, and top executives violated securities laws by concealing a pre-arranged plan to bypass a 180-day lock-up agreement. While the IPO documents indicated that Madison Dearborn would not sell its Class A shares until at least October 13, 2026, the complaint alleges that defendants secretly coordinated with underwriters including Goldman Sachs, BofA Securities, and Jefferies to launch a secondary public offering shortly after the IPO.

The market reacted sharply to these developments. Following the June 1, 2026 announcement of a secondary offering, AEVEX stock dropped approximately 16%. A subsequent 7% decline occurred on June 5 after the company filed a final prospectus revealing the waiver of the lock-up restrictions. Robbins Geller Rudman & Dowd LLP is representing the plaintiffs, seeking to hold the company accountable for the losses incurred during the April 17 to June 4 class period.