Spanish to English Bus/Financial Business/Commerce (general)

From a series of documents issued by/on file with the Spanish Companies House.

This particular bit appears as part of an ink stamp that features the name of the Comisión Nacional del Mercado de Valores, the date and then "REGISTRO DE SALIDA - *E.A.*", followed by a number.

Can't seem to find anything on the Internet for what E.A. could refer to.

Any help appreciated!