Digital banks have been nibbling away at traditional banking for years, but most stuck to their turf — challenger banks in Europe, neobanks in the US, and regional players everywhere else. Nu HoldingsNU

didn’t get that memo. The Brazilian fintech heavyweight, which serves over 122M customers across Latin America, just applied for a US national bank charter — signaling it’s ready to take on American banks in their home market.

The banking gambit: For a company already worth $74.5B and trading as Latin America’s most valuable financial firm, Nubankis betting that its digital-first model can work anywhere — including the world’s most competitive banking market. Born in Brazil, it took off by offering simple services like deposits, credit cards, and loans to people big banks ignored. With no branches and lower costs, it offers better rates — now serving over half of Brazil’s adults and ranking as its third-largest bank. The stock’s up 45% this year, with accounts and deposits rising 17% and 41%, respectively.

• Activity rates hit 83% in the most recent quarter, meaning that percentage of total customers actively use the app — which is well above traditional banks.
• Average revenue per customer climbed to $12.20 from $11.18 in the prior quarter, indicating the company is making more per user even as it adds millions of new ones.

The American Bet

A national bank charter would let Nubank eventually offer deposit accounts, credit cards, lending products, and digital asset custody in the US. The move follows its recent win in Mexico, part of a larger international push as growth slows in Brazil. CEO David Vélez said the charter will help “better serve our existing customers and connect with others who share similar needs.”

• Citigroup’s Gustavo Schroden called Nubank’s US expansion “a good initial step” but cautioned that investors fear management could lose focus as growth efforts accelerate.
• To succeed, Nubank must replicate its Latin American strategy of serving underbanked consumers — but in the US, it faces rivals like ChimeCHYM
  , SoFiSOFI
  , and Marcus by Goldman SachsGS
  .

The big unknowns: Translating its success to the US won’t be easy, though, as it means competing in a mature market where digital banking is mainstream and customer acquisition costs are much higher. Still, its digital-first model cuts out costly branch networks and allows lower prices with strong margins — giving it an edge. With return on equity projected around 29% through 2030, Nubank is banking on momentum that doesn’t recognize borders.