X0609 4 2026-01-15 0001730430 Kiniksa Pharmaceuticals International, plc KNSA 0001464583 Megna Michael R true C/O KINIKSA PHARMACEUTICALS INT'L 105 PICCADILLY, SECOND FLOOR LONDON X0 W1J 7NJ UNITED KINGDOM false true false false CHIEF ACCOUNTING OFFICER 0 Class A Ordinary Share 2026-01-15 4 A 0 372 24.16 A 27418 D Class A Ordinary Share 2026-04-01 4 M 0 7564 A 34982 D Class A Ordinary Share 2026-04-01 4 F 0 3205 48.13 D 31777 D Share Option 48.13 2026-04-01 4 A 0 14600 0 A 2036-03-31 Class A Ordinary Share 14600 14600 D Restricted Share Unit 2026-04-01 4 A 0 3650 0 A Class A Ordinary Share 3650 3650 D Performance Share Unit 2026-04-01 4 A 0 7300 0 A Class A Ordinary Share 73000 7300 D Restricted Share Unit 2026-04-01 4 M 0 2558 0 D Class A Ordinary Share 2558 2557 D Restricted Share Unit 2026-04-01 4 M 0 2362 0 D Class A Ordinary Share 2362 4725 D Restricted Share Unit 2026-04-01 4 M 0 2644 0 D Class A Ordinary Share 2644 7931 D The reporting person is voluntarily reporting the acquisition of these shares pursuant to the Issuer's 2018 Employee Share Purchase Plan for the purchase period of July 16, 2025 to January 15, 2026. The acquisition of these shares was exempt pursuant to Rule 16b-3(e). Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share of the Issuer. The option vests and becomes exercisable as to 25% of the total grant on the first anniversary of the vesting commencement date and vests in 36 equal monthly installments thereafter. The vesting commencement date is April 1, 2026. The RSUs vest over a four-year period, with 25% of the RSUs vesting on the vesting commencement date of April 1, 2026, and each yearly anniversary thereafter. Each Performance Share Unit (PSU) represents a contingent right to receive a number of Class A Ordinary Shares of the Issuer based upon the achievement of certain pre-established performance criteria, as certified by the Issuer's Compensation Committee. Unless earlier forfeited, each PSU vests and converts into not more than 200% of one Class A Ordinary Share of the Issuer no later than January 30, 2029, unless such date falls on a non-business date, in which case the next business date shall apply. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2023. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2024. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2025. /s/ Douglas Barry, Attorney-in-Fact 2026-04-03