ABSTRACTThe Gram-positive diazotrophic seed endophytic bacteriumArthrobactersp. strain ATA002 was isolated from seeds of the endemic cactusMaihueniopsis domeykoensiscollected in the Atacama Desert, Chile. Here, we present a circular genome sequence, obtained by Nanopore sequencing, with a size of 3,904,590 bp and a GC content of 65.9%.