The Science Summit in NYC in September 2025 will include a day-long plenary on Quantum Science and Technology. This initiative fosters international collaboration among nations, researchers, industries, and policymakers. The cross-disciplinary and cross-border nature of quantum science makes cooperation essential, as no single nation or organisation can fully unlock its potential alone. The Quantum Plenary will serve as a platform for sharing knowledge, pooling resources, and establishing global partnerships that can accelerate the development and application of quantum technologies. It also provides an opportunity to address disparities in access to quantum advancements, ensuring that their benefits are distributed equitably across developed and developing nations.