Sö 139 is a Viking Age runestone in granite inscribed in Old Norse with the Younger Futhark runic alphabet. It is located 3.5 m east-north-east of Sö 140 along the road between Lid and Aspa in Ludgo parish, in Nyköping Municipality, in Södermanland.[1] Both stones are placed at the southern side of the road next to the brook at Korpbro.[2] It is 1.48 m tall and 1.36 m wide.[3] The style is tentatively categorized as Pr3.[1] It is unusual because it was raised in memory of a woman.