X0609 4 2026-07-15 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 1 Class A Ordinary Share 2026-07-15 4 A 0 279 33.50 A 27697 D Class A Ordinary Share 2026-09-01 4 M 0 3932 A 31629 D Class A Ordinary Share 2026-09-01 4 M 0 2558 A 34187 D Class A Ordinary Share 2026-09-01 4 M 0 2362 A 36549 D Class A Ordinary Share 2026-09-01 4 M 0 2644 A 39193 D Class A Ordinary Share 2026-09-01 4 F 0 5531 79.28 D 33662 D Class A Ordinary Share 2026-09-03 4 S 0 4600 80.30 D 29062 D Restricted Share Unit 2026-09-01 4 A 0 3650 0 A Class A Ordinary Share 3650 3650 D Share Option 79.28 2026-09-01 4 A 0 14600 0 A 2036-08-31 Class A Ordinary Share 14600 14600 D Restricted Share Unit 2026-09-01 4 M 0 2644 0 D Class A Ordinary Share 2644 7931 D Restricted Share Unit 2026-09-01 4 M 0 2362 0 D Class A Ordinary Share 2362 4725 D Restricted Share Unit 2026-09-01 4 M 0 2558 0 D Class A Ordinary Share 2558 2557 D Restricted Share Unit 2026-09-01 4 M 0 3932 0 D Class A Ordinary Share 3932 0 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 January 16, 2026 to July 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. This transaction was effected pursuant to a 10b5-1 plan executed by the reporting person on May 24, 2025. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, September 1, 2026. 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 September 1, 2026. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, September 1, 2025. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the grant date, September 1, 2024. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, September 1, 2023. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, September 1, 2022. /s/ Douglas Barry, Attorney-in-Fact 2026-09-03