Santander, BBVA, Trade Republic and Western Union will take part in MERGE Madrid 2026, an event built around one thesis: stablecoins have moved past crypto and into the payments stack. The conference runs in Madrid in September 2026. The lineup puts two Spanish banks, a German brokerage and one of the world's largest money-transfer operators in the same room, which is roughly the guest list you'd draw up if you wanted to prove stablecoins are no longer a crypto-only story.
Four very different balance sheets
What the roster makes clear is how broad the interest has become. Santander and BBVA are incumbents with legacy cross-border operations to defend. Trade Republic built its user base on low-cost retail trading and has been pushing further into everyday finance. Western Union sits at the centre of the remittance corridor business that stablecoins are most directly aimed at. None of them needs to be sold on the concept. They're already working out where it fits.
The event's framing goes a step further, describing stablecoins as a new piece of financial infrastructure rather than a product category. That's a deliberate word choice. Infrastructure is a thing banks plug into, not a thing they compete with from the outside.
Why payments and transfers lead the agenda
MERGE Madrid's stated focus is payments, international transfers and investment. That ordering isn't accidental. Payments and remittances are where the cost and settlement delays of the existing system are easiest to quantify, and where a tokenised dollar can be dropped in without asking customers to open a crypto wallet. Investment is the longer tail of the programme — the part where tokenised assets brush against brokerage and wealth products.
The inclusion of Trade Republic alongside two retail banks and a remittance network maps onto that split. The brokerage angle is investment. Western Union is transfers. The banks sit across both.
A crowded calendar, a narrow question
Bank participation in stablecoin conferences is hardly novel by 2026. What's notable here is the specificity of the brief. This isn't a panel on digital assets in the abstract. The organisers have framed the whole event around stablecoins as infrastructure for payments, transfers and investment, and the four named participants are the kinds of firms that would actually have to run that infrastructure at scale.
The open question is whether banks and payment companies end up building their own settlement rails or leaning on existing stablecoin issuers. None of the four has said which route it prefers, and the event programme doesn't appear to have committed them to an answer.
What to watch in Madrid
MERGE Madrid 2026 is scheduled for September 2026. The concrete thing to look for is whether the four firms arrive with products, pilots or partnership announcements, or whether they stick to the broader strategic view. A conference slot is not a commitment. But when two of Spain's largest banks and a remittance giant share a stage on stablecoins, the market tends to read it as a signal about where the money is going next.
