AEVEX Corp. is facing a securities class action alleging that the defense technology contractor and other defendants misled investors about a 180-day lock-up tied to its April 2026 initial public offering. The complaint names Madison Dearborn Partners, LLC, AEVEX's controlling private equity owner, certain executives and directors, and IPO underwriters, alleging violations of the Securities Act of 1933 and/or the Securities Exchange Act of 1934. AEVEX sold 18.4 million common shares in the IPO. The lawsuit alleges defendants had a pre-arranged plan with Goldman Sachs & Co. LLC, BofA Securities, Inc., and Jefferies LLC to waive the lock-up and conduct a secondary public offering shortly afterward. AEVEX's stock fell about 16% after a June 1 registration filing disclosed plans to sell eight million additional Class A shares and declined another 7% after later offering documents disclosed the alleged lock-up arrangement, according to the complaint. Investors who bought or acquired Class A shares traceable to the IPO offering documents or during the April 17-to-June 4 class period have until October 20, 2026, to seek appointment as lead plaintiff. Robbins Geller Rudman & Dowd LLP is representing the plaintiffs and says investors do not need to serve as lead plaintiff to participate in any potential recovery.