The share price of Cosan S.A. (NYSE:CSAN) fell by 7.4% between December 17 and December 24, 2025, putting it among the Energy Stocks that Lost the Most This Week. Cosan (CSAN) Continued to Slide This Week. Here is Why Cosan S.A. (NYSE:CSAN) is a Brazilian conglomerate engaged in fuel distribution. It operates through Raízen, Compass, Moove, Rumo, and Radar segments. Cosan S.A. (NYSE: CSAN) has continued on a downward trajectory since December 5, when former Brazilian President Jair Bolsonaro endorsed hi ...