The core activities of the companies are:
1. Luxor Factory: Art organization
2. Le Coin Bleu: Clothing store
3. The Educational Center Foundation Billodes: Educational institution
4. Jivan Association Caritative: Clothing store
5. Stampfli Restauration de Cadrans: Watch restoration
6. Association pour le traitement et la recherche médicale (ATRM): Medical research and treatment
7. Loterie Romande: Gambling and lottery
8. Cercle Scolaire Le Locle: Educational institution
9. Caisse de chômage Unia Le Locle: Employment agency and social services
10. La roulotte du corbu: Volunteering and social services
There are also some general categories that encompass multiple companies, such as 'Association or organization' or 'Volunteer organization', but the above descriptions are more specific and accurate.