Oura Health Oy, the Finnish maker of health and wellness tracking smart rings, confidentially files for a U.S. initial public offering with the U.S. Securities and Exchange Commission, according to multiple reports. Bloomberg and CNBC each describe the filing as confidential, with Bloomberg citing a person familiar with the matter. Engadget similarly reports that Oura has filed for an IPO. The filing follows recent funding activity: The Next Web reports Oura closed a $900 million Series E less than a year ago, valuing the company at $11 billion, more than double its valuation from December 2024. Inc. also connects the IPO filing to that $11 billion valuation and says Oura has sold more than 5.5 million smart rings since launching in 2013. Forbes frames the move as part of a broader wave of tech IPO activity in 2026, but does not provide additional deal specifics. As of these reports, no information is provided on expected timing, offer size, or whether the company plans to list on a specific exchange, since the filing details are not public.