Smart ring maker Oura reveals revenue surge in US IPO filing

The IPO market is ‌expected to ⁠pick up ⁠steam after a summer lull. Analysts expect issuers to target the ​post-Labor Day window to get ahead of any uncertainty around November's midterm elections. Oura, ​whose journey began more than a decade ago in Oulu, Finland, makes a smart ring that tracks key ​health indicators such as heart rate, sleep ⁠stages and ‌physical activity.