My research suggests that organizational fields are patchy and uneven. This patchiness allows organizations at the margins of fields to sidestep pressures for conformity. As a case study, this paper examines the private school field in Toronto, Canada. Data come from interviews and site visits at 60 Toronto private schools. My findings suggest that Toronto’s private school field is segmented, incorporating diverse private school forms, including elite, religious, and ‘rogue’ (non-elite, non-religious) schools. Within one subfield – small rogue private schools – a high degree of heterogeneity exists. These findings suggest a nuanced conception of institutional fields, with more attention to organizational agency, multiple field logics and diversity among organizational forms. This paper examines how organizations at the margins of fields are able to evade pressures for conformity, and how a heterogeneous organizational field can also be comprised of clusters of homogeneity.