[Smart Ring Manufacturer Oura Files for U.S. IPO, Plans to List on Nasdaq] According to Bloomberg, smart ring manufacturer Oura has filed for a U.S. IPO. Documents show that its revenue for the nine months ending June 30 was $1.21 billion, with a net loss attributable to shareholders of $924 million (compared to a loss of $183 million in the same period last year). Over the past year, Oura sold approximately 3.6 million rings. The Oura Ring 5 starts at a retail price of $399, and the company has over 5 million paying members. Oura secretly filed for an IPO in May, and Bloomberg reports that the listing could raise up to $3 billion, with a valuation exceeding $16 billion. The company is expected to list on Nasdaq under the ticker symbol OURA. Goldman Sachs, Morgan Stanley, and JPMorgan are serving as underwriters. On Wednesday, Oura announced an expansion of its board of directors, bringing in executives from Netflix and Robinhood.