Circular economy is a key strategy to achieve corporate sustainability. However, so far, most firms are unable to translate the concept of circular economy into their corporate strategies, business models, and operations. Some scholars have argued that firms need to develop new (and dynamic) capabilities for circular economy implementation. Yet there is a little discussion on how firms can develop such capabilities. Notably, there is a paucity of research on specific skills, processes, and organizational activities (microfoundations of dynamic capabilities) that may facilitate circular economy implementation. To address this knowledge gap, using a multiple‐case studies approach, we explore microfoundations of dynamic capabilities in successful circular economy business cases. Our findings indicate that dynamic capabilities positively contribute to circular economy implementation. Our case studies show that case firms identified circular economy opportunities by using four microfoundations of sensing capability. Further, case firms acted on the identified opportunities by using simultaneously three microfoundations of seizing capability and four microfoundations of reconfiguring capability. This paper contributes to the literature on the relations between dynamic capabilities and corporate sustainability by providing insights on how sensing, seizing, and reconfiguring dynamic capabilities act in successful operationalization of circular economy strategies.