AEVEX Corp. faces a securities fraud class action on behalf of investors who acquired Class A common stock in or traceable to its April 2026 initial public offering or during the alleged class period. The complaint, Rosenberg v. AEVEX Corp., No. 26-cv-04779 (S.D. Cal.), names AEVEX, Madison Dearborn Partners LLC, certain executives and directors, and IPO underwriters, alleging violations of the Securities Act of 1933 and the Securities Exchange Act of 1934. The allegations center on a pre-arranged plan to waive Madison Dearborn’s 180-day lock-up and conduct an eight-million-share secondary public offering shortly after the IPO. AEVEX sold 18.4 million shares in the IPO, and its stock fell approximately 16% after the June 1 filing announcing the secondary offering and another 7% after documents disclosed the lock-up waiver, according to the complaint. Earlier case materials said more than two million shares came from Madison Dearborn’s holdings, nearly six million were newly issued, and the $207.9 million in net proceeds went to Madison Dearborn while AEVEX received none. A Howard G. Smith notice describes the alleged class period as April 14 through June 4, 2026, while earlier case materials identified April 17 through June 4. Investors have until October 20, 2026, to seek appointment as lead plaintiff; investors may also retain counsel of their choice or take no action and remain absent class members.