Abstract: Embodiments of the present invention disclose a method, computer program product, and system for managing group members. A computer identifies a collaboration activity that corresponds to a defined group, wherein the defined group includes one or more individuals, and the collaboration activity is comprised of the defined group and one or more additional individuals. The computer determines participation and contribution information that correspond to the one or more individuals of the defined group and the one or more additional individuals included in the identified collaboration activity. The computer determines relevant individuals from the identified collaboration activity by utilizing determined participation and contribution information. In response to determining the relevant individuals, the computer determines an updated group wherein the updated group includes determined relevant individuals.