Health-tracking smart ring maker Oura to list on US stock market

Valuation above $11bn expected for firm whose fans include Prince Harry, Jennifer Aniston and Kim Kardashian

Fans of Oura are accustomed to using its trendy smart rings to fastidiously monitor their health but now investors are preparing to track a new metric: its share price.

The company’s filing to list imminently on the Nasdaq stock exchange in New York was made public on Thursday.

Founded in Finland in 2013 and now headquartered in San Francisco, Oura’s smart rings have become a must-have item among wellbeing enthusiasts, with celebrity fans and ambassadors including Jennifer Aniston, Prince Harry, Kim Kardashian and the Spider-Man actor Tom Holland.

The ring allows users to track metrics including heart rate, temperature and sleep quality.

Oura made its first profit only last year, notching up $1.6m, and followed that with a $60.8m profit in the nine months to the end of June. It is aiming to list on the Nasdaq as soon as later this month, with a valuation expected well above the $11bn it was valued at when it raised $900m last year.

Oura said it has collected almost 42bn hours of biometric physiological data from users across 50 metrics.

The latest product, Oura Ring 5, went on sale in May at $399 and is 40% smaller than its predecessor . It records heart rate, blood oxygen, temperature and motion, tracking more than 50 metrics involved in sleep, activity, readiness, stress, resilience, heart and women’s health.