Ataute, S.L., better known by their trading name Kukuxumusu (Basque: /kukuʃumus̺u/), is a Spanish company from Pamplona, Navarra specialising in clothing and product design.

The company gradually grew and is now one of the key images of San Fermín; in addition to clothing they also produce other goods such as chinaware, keyrings and postcards.

Their most famous designs involve bulls and the San Fermín runners in their traditional red and white clothing, but adding some absurd elements.

Kukuxumusu's designs have grown to include other Spanish regions festivals and typical elements and have, therefore, become a popular souvenir in Spain.

Kukuxumusu has added computer screensavers and virtual postcards, with their usual unique humour to their line of clothing and souvenirs.