 The gross proceeds to Kiniksa from this offering, together with the proceeds from the sale of 1,600,000 Class A1 common shares at the public offering price in a concurrent private placement, before fees and estimated expenses, are expected to be 73,000,000. In addition, Kiniksa has granted the underwriters a 30-day option to purchase up to 360,000 additional Class A common shares at the public offering price, less underwriting discounts and commissions. The public offering is expected to close on May 18, 2020, subject to customary closing conditions. 