A light gas gun has been used to measure the Hugoniot of Metglass 2605CO ribbon. Quartz gauges were used to measure stress. Both front‐ and rear‐surface measurements were done. Front‐surface experiments impacted the ribbon onto quartz gauges, while back‐ surface experiments impacted an aluminum plate into the ribbon which was backed by a quartz gauge. Single layers and composite layers of the ribbon were used. Two single‐layer front‐surface experiments provided the most accurate data.