“Can Brazil's dominant exchange become the API-first data and registration layer beneath every domestic fintech and bank?”
B3 is Brazil's exchange and post-trade infrastructure operator, formed in 2017 from the BM&FBovespa/Cetip merger. Its embedded-finance-adjacent business is not consumer or SMB financial services but wholesale market infrastructure: a trade repository for card receivables, securities lending platforms (BTB), a fixed-income OTC registration system (NoMe), and a growing B2B API catalog (114+ APIs) exposing custody, receivables, and investor data to fintechs and banks. Banco B3 S.A. is an in-house banking subsidiary supporting clearing/settlement functions.
B3 discloses Banco B3 S.A. (in-house) as its banking provider, according to the Embedded Finance Index 2026.
B3 does not disclose a bank charter of its own; its banking services are provided through Banco B3 S.A. (in-house).
B3 is founded in 2017 and headquartered in São Paulo, Brazil.
Get a read on where your own stack stands against B3 and the rest of its category — what they built versus bought, which providers they use, and where the gaps in your own strategy and competitive set actually are.