Dexcom Inc. put real money behind expanding its integration efforts, with a $75 million investment in the $200 million series D for Ōura Health Oy, the maker of the Ōura smart ring. Ōura and Dexcom also provided details on a strategic partnership that integrates data from Dexcom’s continuous glucose monitors with vital sign, sleep, stress, heart health and activity data from the Ōura ring.