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Two planets have been detected around the 23 Myr pre-main sequence M dwarf AU Mic their known age makes them good probes for early stages of exoplanet evolution. AU Mic c is the 2.56 Earth radius outer planet orbiting with a period of 18.9 days. It has a mass of about 20 Earth masses. The planet.s relatively low density comma high levels of X-ray and UV radiation comma proximity to its bright host comma and its youth indicate this planet is likely experiencing atmospheric mass loss. This makes it an excellent target for STIS UV observations to look for escaping neutral hydrogen during transit at Lyman-alpha. AU Mic b comma even closer to its host comma already has similar observations comma so observations of AU Mic c will provide the opportunity to explore atmospheric escape process for multiple planets in the same system. With STIS observations of AU mic c comma we can constrain the planet.s mass loss rate and potentially the dynamics of the upper atmosphere. Observations of AU Mic c will provide much needed additional data to test atmospheric escape models.