abstract: Let $X$ be a K3 surface with a large automorphism group $\text{Aut}(X)$ (we do not assume that it contains any parabolic elements). Consider a probability measure $\mu$ on $\text{Aut}(X)$; using the work of Cantat and DuJardin (2020) we study hyperbolic, ergodic $\mu$-stationary probability measures, and the supports of their conditional measures on the stable and unstable manifolds (which are a.e. biholomorphic to $\mathbb{C}$) using the techniques of Benoist and Quint (2011), and Eskin and Mirzakhani (2018).