Jack Mallers has launched a new Bitcoin-native company named Twenty One Capital, which has now gone public after merging with Cantor Equity Partners. The company began trading on the New York Stock Exchange under the ticker XXI, debuting with more than 43,500 Bitcoin in its treasury—one of the largest corporate Bitcoin holdings on a public market.

Backed by major players including Tether and SoftBank Group, the firm aims to build financial infrastructure entirely around Bitcoin rather than operating only as a holding company.