Over the past four decades, Professor Stanley P. Owocki and his collaborators have made great strides in understanding the physical processes that control the structure of stellar outflows, most particularly the line-driven winds of massive stars. To celebrate his formal retirement from the Bartol Research Institute of the University of Delaware, his friends and colleagues organized a meeting in his honor to review these fundamental advances and consider the prospects they provide for continued progress. This "Stan Fest," more formally titled "Fundamentals of Stellar Outflows: Celebrating and Amplifying the Scientific Life of Stan Owocki," was hosted by the Institute of Astronomy of KU Leuven from July 8 to 12, 2024 in the beautiful Belgian city of Leuven. The proceedings volume archived here contains the abstracts of every talk, full submitted papers, and links to the KU Leuven YouTube channel where videos of the talks can be found.