This paper examines the dynamics and characteristics of high-growth firms in Tunisia. Further knowledge about the dynamics of these firms can inform the design of business support policies, especially toward small and medium-size firms. The analysis suggests that between 1999 and 2015, about 9 to 10.5 percent of the firms in Tunisia achieved high-growth status per year, on average, depending on the definition used, and these shares have been remarkably stable over time. Although a small share of firms achieves high growth annually, almost one in every three firms that survive for more than a decade has achieved high-growth status at least once. High-growth status is more prevalent among small and young firms, as well as firms that export, import, or receive foreign direct investments.