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b:air AG 

Langenthal · Since 2025

The core activity of b:air AG is the planning, implementation and maintenance of ventilation, air conditioning and energy technology systems, as well as the corresponding services.

bar gelateria RIVA GmbH 

Langenthal · Since 2012

The company's core activity is the production and sale of Italian-style ice cream, as well as the operation of a gelateria, yogurteria, lounge and bar, offering a range of additional food and beverages.

BauDesign Partner GmbH 

Langenthal · Since 2007

The company's core activity is the provision of services in the field of architecture and building design.

BDO AG 

Langenthal · Since 2015

BDO AG provides audit, fiduciary, tax and advisory services for businesses and private clients. Its offering also includes financial services, digital solutions and Abacus-related services, as well as sector publications and professional events.

Bellini Personal AG 

Langenthal · Since 2009

Bellini Personal AG provides temporary placements in the construction sector and offers recruitment and personnel-management services to companies. Its services include temporary staffing, permanent placement with a try‑and‑hire option, and payroll services provided via a partner.

Bering AG, Zweigniederlassung Langenthal 

Langenthal · Since 1986

Bering AG, Zweigniederlassung Langenthal is an engineering firm that designs electrical installations and supports projects from feasibility studies through commissioning. Its services include electrical planning, photovoltaics, KNX system integration, building automation and solutions for water and wastewater installations.

Bernhard Polybau AG 

Langenthal · Since 1980

Bernhard Polybau AG provides planning, installation and maintenance services for building envelopes, including flat, pitched and metal roofs, façades, solar systems and sheet‑metal work.

Bernhard Partner AG 

Langenthal · Since 2016

The core activity of Bernhard Partner AG is the planning, accompaniment and realization of halls, facades and photovoltaic systems. The company offers economic solutions for individual needs and works in partnership with a network of specialists. The core activities include: Hall construction: Development of economic solutions for individual needs, Facade construction: Planning and realization of facades for existing and new buildings, Photovoltaic systems: Planning and structural implementation of photovoltaic systems for companies. The company focuses on the planning and realization of construction projects with a focus on functionality and economy.

Biodiversia GmbH 

Langenthal · Since 2006

Biodiversia GmbH provides project management, consulting and communication services focused on promoting biodiversity and sustainable landscape and regional development. Its services include event organisation, management of invasive neophytes and education for sustainable development.

Biomechanisch korrekt Reiten Florence Polyak 

Langenthal · Since 2022

The company's core activity is the training and certification of riding instructors, as well as the implementation of courses and training programs in the field of biomechanically correct riding. The company offers specialized trainers who teach and support riders in various disciplines such as dressage, show jumping, eventing, and leisure riding. The goal is to help riders recognize and improve their riding patterns in order to promote a harmonious and effective partnership between rider and horse.