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Knowledge about the number of reproductive females is important for monitoring population dynamics, and can be critical for managing human–wildlife conflicts. For wolverines Gulo gulo, counts of reproductive females is the basis for estimates of population size in Scandinavia, as well as a key measure for compensation payments to Sámi reindeer‐herders in Sweden. However, documenting wolverine reproductive events in the field is challenging and requires knowledge of female denning behaviour. Furthermore, females may shift den sites, presenting difficulties in determining whether two den sites belong to the same or two neighbouring females. In this study, we used data from 18 GPS‐collared wolverine females, monitored intensively during the denning season (15 February–31 May) in 2004–2014, to provide baseline information on denning behaviour. We documented reproductive events in 32 of 54 …