BRUSSELS — The European Union's Markets in Crypto-Assets regulation reached a critical compliance deadline on Wednesday, ending the transition period during which crypto firms could operate without full national authorisation across member states.

The MiCA framework, which entered into force in stages from 2024, granted existing crypto-asset service providers a grandfathering window to obtain licences under the harmonised regime. The European Securities and Markets Authority warned that platforms failing to register would be required to wind down operations in the bloc.

Stablecoin issuers and exchanges face the most immediate impact. Providers offering euro- or dollar-pegged tokens must hold proper authorisation and meet reserve and disclosure requirements. Several smaller platforms have signalled they will exit certain national markets rather than meet the new obligations.

ESMA officials said the regulator expected national competent authorities to step up enforcement against non-compliant firms. The European Crypto Initiative said the rules brought legal clarity but warned that uneven national implementation could fragment the market.

The deadline coincided with heightened market sensitivity, with traders also weighing the latest US jobs data. Analysts at several European exchanges said the regulatory cutoff could accelerate consolidation, favouring larger, better-capitalised platforms able to absorb compliance costs.