Kiniksa Pharmaceuticals Ltd

Our United States headquarters are located in Lexington, Massachusetts, where Kiniksa Pharmaceuticals Corp., our wholly owned subsidiary (“Kiniksa US”), has leased approximately 55,924 square feet of office and laboratory space, under a lease which expires in August 2028. Kiniksa US has also leased approximately 2,000 square feet of office space in San Diego, California which expires in March 2025. Further, Kiniksa Pharmaceuticals (UK), Ltd., our wholly owned subsidiary (“Kiniksa UK”), has leased approximately 164 square meters of office space in London, UK which expires in November 2025. Kiniksa UK’s Swiss branch office has leased approximately 57 square meters of office space in Zug, Switzerland, which can be terminated upon six months’ notice. While we believe that our offices are sufficient to meet our current needs, we may in the future seek additional or alternative office space in the United States or internationally to facilitate our operations, as needed.