X4 PHARMACEUTICALS, INC. 52,300,000 Shares of Common Stock Pre-Funded Warrants to Purchase 6,800,000 Shares of Common Stock Class C Warrants to Purchase 29,550,000 Shares of Common Stock UNDERWRITING AGREEMENTUnderwriting Agreement • December 9th, 2022 • X4 Pharmaceuticals, Inc • Biological products, (no disgnostic substances) • New York
