This study explores how organizational identity is linked with organizational behavior and change at U.S. colleges and universities. Using IPEDS data from 914 public and private not-for-profit four-year institutions, this study analyzes how institutions' identity claims through their self-identified comparison groups are associated with Carnegie Classification change between 2010 and 2015. Results indicate that institutions that identified a higher proportion of aspirational peers and a set of peers who changed over the study period were more likely to be re-classified in 2015. These findings suggest that identity is a key variable that influences how postsecondary institutions adapt to their environments.