Comprehensive compilation of every RE-free magnetic compound found on Ouro, built using ouro-py files.search() across all 13,501 CIF files on the platform. 4,319 unique formulas from 12,291 matching CIF files. Parsed with pymatgen for formula, space group, and composition. Filtered: at least one ferromagnetic element (Fe,Co,Ni,Mn,Cr), no rare earths (Sc,Y,lanthanides).