The Berkeley Institute for Data Science (BIDS) and UC OSPO Network members hosted the second annual UC Open Summit in Berkeley, April 22-23, 2026. Guided by the principles of being genuinely enjoyable, small but mighty, and warmly collaborative, the tone was set for this gathering of 150 open source enthusiasts, researchers, and educators from across the University of California system. The future of open science, scholarship, and sustainability was top of mind for all...