Arête Glacier Initiative is a new, ambitious, mission-driven nonprofit established to provide humanity with the options to manage and reduce the risks of catastrophic sea-level rise. We aim to better understand the risk of catastrophic sea-level rise and assess the feasibility of novel and potentially transformative interventions to stabilize ice sheets. Our goal is to fund, coordinate, and accelerate research to enable informed decisions regarding these interventions. We achieve this by advancing and funding an ambitious scientific agenda; fostering collaboration among glaciologists, philanthropists, and policymakers; and driving a forward-looking policy agenda that includes renewed government investments in the Antarctic.