United Kingdom-based Blockchain.com Group Holdings Inc., a cryptocurrency exchange and wallet service, announced Thursday that it has filed confidentially for an initial public offering in the United States. 

The details of the IPO remain undisclosed, with the number of shares or expected price range undetermined as the U.S. Securities and Exchange Commission reviews the application. 

Founded in 2011, Blockchain.com began as a blockchain explorer, a type of analysis tool that allows visitors to view transactions on the global distributed ledger ecosystem and track them from their origin to their current state. As the company evolved, it became a cryptocurrency wallet and exchange, allowing users to buy, hold, sell and trade…