Both group agents (for group agency theorists) and individual agents (for enactivists) are themselves constituted by agents. This raises a similar challenge for both group agency and enactivism, namely to explain the constitutive relationship between sub-agential agents and the agents themselves. In this paper, I propose an enactivist account of what constitutes collective action. I conclude that non-human processes—both natural and artificial—may be constitutive of group agents typically recognized as human. In particular, I argue that machine learning recommendation algorithms should be recognized as constitutive of certain group agents on an enactivist account of what constitutes collective action.