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Jacqueline Spengler Stiftung 

Basel · Since 1999

The company's core activity is the management and administration of foundations, as well as the promotion of social, cultural and ecological projects. This includes advising on philanthropic matters, managing existing foundations, accompanying new foundations and providing financial support for projects in the areas of social welfare, culture and the environment.

JC Insurance Brokers GmbH 

Basel · Since 2019

The company is an insurance consulting firm specializing in the brokerage and management of insurance policies for business and private customers in Switzerland. The core activities include: insurance consulting and brokerage, management of existing and new insurance policies, creation of individual insurance packages, identification of under- and over-insurance and creation of savings potential, tax consulting and declaration for natural persons, financial consulting and planning. The company also offers additional services such as workshops, seminars, and support with tax returns.

Jean-David Cahn AG 

Basel · Since 1999

The core activity of Galerie Cahn is the trade in antique artworks, particularly from Greek, Etruscan and Roman antiquity, as well as the organization of exhibitions and auctions. The company also offers services such as provenance research and valuation of artworks and works closely with museums, collectors and other art experts. Furthermore, Galerie Cahn is also committed to contemporary art and offers young artists the opportunity to exhibit their works in the gallery's premises.

Jeker Finance 

Basel · Since 2020

The core activity of Jeker Finance is to provide services in the fields of tax consulting, financial planning, investment, insurance and legal consulting, particularly in the preparation of tax returns and the calculation of personal tax liabilities.

Jet & Boat Cleaning Services GmbH 

Basel · Since 2015

The core activity of the company "Jet & Boat Cleaning Services GmbH" is the cleaning of jet skis and boats.

JobKompass GmbH 

Basel · Since 2012

JobKompass GmbH provides career guidance and job coaching, including development of application dossiers, interview preparation, job-search support and assistance with business-plan development for self-employment.

Joseph Haydn Stiftung 

Basel · Since 2013

The company's core activity is the organization, production and financing of music projects, in particular the performance and recording of Joseph Haydn's symphonies with renowned orchestras and conductors, as well as the publication of these recordings as a CD and vinyl collector's edition in book form.

Joss Treuhand 

Basel · Since 2002

The core activity of KMU Joss Treuhand GmbH is the provision of trust services for small and medium-sized enterprises, particularly in the areas of finance (accounting, etc.), human resources, and taxation. The company offers tailored services to support customers in managing their finances, personnel matters, and taxes, allowing them to focus on their core activities.

JUMA Solutions GmbH 

Basel · Since 2019

The core activity of JUMA Solutions GmbH is the consulting and management of real estate objects, including legal consulting, project accompaniment and administrative support.

jusp architecture GmbH 

Basel · Since 2023

The core activity of the company "jusp architecture" is the provision of architectural services, in particular the planning and realization of renovation and new construction projects, as well as project management and direction in the field of architecture.