StoneCo Ltd. STNE Moat

Key data

The moat

A Brazilian corner shop that takes card payments on a Stone terminal, banks the proceeds in a Stone account, and borrows working capital against those receivables has all three tied together. The lender can see the merchant's daily takings because it processes them, which is an underwriting advantage no outside bank has, and the merchant cannot easily move the payments without unwinding the loan.

That is the model: use payments to acquire the merchant, use the payment data to lend, and use the loan to hold them. It works while the loans perform.

What it produced is a merchant base rising from 4.17 to 4.82 million, and a lending business built on data nobody else can see.

Widening or narrowing

The client count and the loan book are both growing and one number is moving much faster than either.

Payment volume is flat across the full period, ending roughly where it started, which for the business that acquires every merchant is the weakest possible result. Active clients rose steadily, so the flatness is volume per merchant falling rather than merchants leaving. The credit portfolio tripled.

Loans more than ninety days overdue rose in every single quarter, from 3.61% to 8.60%, with the sharpest moves in the two most recent. The company attributes it to weaker vintages from late 2025 and early 2026 flowing into provisions, and separately flags higher churn observed from the fourth quarter of 2025 concentrated in its lower-end brand.

The overrated case, and it is a metric change. From the first quarter of 2026 the company consolidated its active client base into a single unified figure and discontinued the separate disclosure of the payments client base and the banking client base. Those were last published for the fourth quarter of 2025. The split was how a reader could tell whether the banking relationship was actually forming underneath the payments one, which is the entire premise of the model. Without it, a single client number cannot distinguish a merchant who only takes card payments from one who banks and borrows as well.

On profit pool, StoneCo takes an acquiring spread on the card sale and interest on the loan against it. Two slices of the same merchant, and the second is where the money is, which is why the credit series matters more than the volume series.

The moat is narrowing.