Smart ring maker Oura and backers seek $2.2B in US IPO

Health and fitness ring-maker Oura Inc. and some of its backers are seeking to raise as much as $2.2 billion in an initial public offering in the US.

• Oura and its backers aim to raise up to $2.2 billion in an IPO
• The offering will take place on a US exchange
• Oura makes smart rings for health and fitness tracking