Gemini, a crypto exchange run by billionaire twins Tyler and Cameron Winklevoss, on Friday disclosed it had confidentially filed for a U.S. initial public offering, as digital asset firms seize on renewed market momentum.

The crypto exchange has been taking major steps to go public in the U.S., including hiring Goldman Sachs and Citigroup as its financial advisors for the IPO. Gemini had also settled a $5 million lawsuit by the Commodity Futures Trading Commission, while the SEC ended its investigation into the exchange earlier this year.