ARCALYST Performance and Market - ARCALYST has generated over $1 billion in revenue since its launch[7] - Expected 2025 ARCALYST revenue is projected to be between $625 million and $640 million[7, 51] - ARCALYST has achieved approximately 15% penetration into the target population of recurrent pericarditis patients as of Q2 2025[7, 23, 29] - Approximately 80% of ARCALYST prescriptions are for patients with ≥3rd recurrence[23] - Approximately 20% of ARCALYST prescriptions are for patients in their 1st recurrence[23] - Payer approval for ARCALYST exceeds 90% of completed cases[28] - Approximately 45% of patients restarted ARCALYST therapy following initial discontinuation within ~8 weeks[37, 40] - The average total duration of ARCALYST therapy is approximately 30 months[28, 40] Financial Position - Kiniksa reported Q2 2025 cash reserves of approximately $308 million[8] - Kiniksa's operating plan is expected to remain cash flow positive on an annual basis[7, 78] - ARCALYST net sales for Q2 2025 were $156.8 million, compared to $103.4 million in Q2 2024[77] KPL-387 Development - A Phase 2/3 trial for KPL-387 in recurrent pericarditis has been initiated, with Phase 2 dose-focusing data expected in the second half of 2026[8]

Financial Performance & Growth - Kiniksa expects ARCALYST net revenue for 2025 to be between $590 million and $605 million[7, 34] - The company's Q1 2025 net revenue grew by approximately 75% year-over-year[13] - Kiniksa's Q1 2025 cash reserves are approximately $268 million[8, 35] - ARCALYST has achieved only about 13% penetration into its target population as of the end of Q4 2024[7, 18] Clinical Development - Kiniksa is developing KPL-387 for recurrent pericarditis, with a Phase 2/3 trial expected to begin in mid-2025 and Phase 2 data expected in the second half of 2026[7, 34] - The company is conducting IND-enabling activities with KPL-1161[7, 34] - KPL-387 is a fully human IgG2 monoclonal antibody that binds to IL-1R1, inhibiting IL-1α & IL-1β cytokine-mediated signaling[22] Commercial Strategy - Kiniksa's strategy focuses on driving future growth through innovation and execution, maximizing the current commercial opportunity for ARCALYST, and advancing its clinical portfolio[34] - The company aims to support the creation of an efficient network of care with regional centers of excellence and educate on data related to duration of disease and treatment to support longer-term persistence on ARCALYST[18]