Energy & Environment

Omneo AG 

Dübendorf · Since 2020

The core activity of Omneo AG is the planning, implementation and maintenance of heating, photovoltaic and electromobility solutions for buildings, particularly in the field of renewable energies. This includes consulting, planning and implementation of projects in the areas of heating replacement, photovoltaic systems, heat pump systems and electromobility solutions.

omniEnergie gmbh 

Stäfa · Since 2022

The core activity of omniEnergie gmbh is the planning, consulting and implementation of efficient energy technology solutions, particularly in the field of renewable energies, building technology, solar systems and e-mobility. This specifically includes: Energy consulting and planning, planning and installation of photovoltaic systems and heating systems, simulation of energy systems, e-mobility and battery storage solutions, heating replacement and optimization, thermal insulation and building technology. The company also offers impulse consulting and certified energy consulting for SMEs and commercial enterprises.

OmniWatt AG 

Baar · Since 2023

The core activity of OmniWatt AG is the planning, implementation and maintenance of large-scale solar power plants.

OMPEX AG 

Zurich · Since 2006

The core activity of Ompex is the provision of energy services, particularly in the areas of: * Consulting * Trading & Portfolio Management * Process Support * Market access and settlement for electricity, gas, CO2 and certificates of origin. Ompex acts as an independent energy service provider and supports customers in mastering the challenges of the liberalized European energy markets.

One Planet Sustainables, Inh. Michel 

Roggwil Be · Since 2021

The core activity of One Planet Sustainables is the development, production and distribution of reusable, eco-friendly feminine hygiene products, particularly sanitary pads, with the aim of combating period poverty in low-income countries while protecting the environment.

onewallfree AG 

Ruswil · Since 2021

onewallfree AG connects solar power producers and consumers through a marketplace for ZEV, vZEV and local electricity communities. It provides consulting, network-topology checks, metering-data management, billing and debt-collection services to set up and operate these self-consumption arrangements.

Oommen Sahlender Consulting 

Frick · Since 2024

The core activity of "aos consulting" is the consulting and project support of architects, construction companies and investors in the planning and realization of sustainable buildings. This includes, in particular, the creation of life cycle assessments, the implementation of building certifications (e.g. Minergie-ECO, SNBS, DGNB, LEED, WELL) and the development of strategies to reduce the environmental impact of buildings.

OPEN Optimizing Energy SA 

Poschiavo · Since 2022

The core activity of OPEN Optimizing Energy SA is the optimization and valorization of potential energy through the production of electricity from renewable sources, the improvement of electrical interconnections and investments in sustainable asset classes, in order to promote a sustainable energy transition.

OptimalGo SA 

Chavannes-De-Bogis · Since 1945

The core activity of OptimalWay/OptimalGo is the planning, development and installation of systems for autonomous energy generation, particularly through the use of renewable energies such as solar, geothermal and wind energy. The company offers solutions for capturing and optimizing these energies to make buildings and facilities independent of external energy sources.

OptimaSolar Freiamt Genossenschaft 

Benzenschwil · Since 1991

The core activity of OptimaSolar Freiamt Genossenschaft is the production and distribution of solar power and other renewable energies. The company operates photovoltaic systems and hydroelectric power plants to generate electricity, which it supplies to private individuals and companies. In addition, the company also offers services such as certificates of origin and pooling for the self-consumption of solar power.

OptimaSolar Züri Unterland Genossenschaft 

Niederweningen · Since 2022

The core activity of OptimaSolar Züri Unterland is the planning, construction and operation of photovoltaic systems, particularly on the roofs of larger residential and commercial buildings, schools and public buildings, with the aim of producing solar power and contributing to the acceleration of the energy transition.

Optimum Swiss Solar Sàrl 

Delémont · Since 2020

Optineon AG 

Aarau · Since 2015

The core activity of Optineon AG is the transfer and dissemination of Swiss know-how, technologies and innovations in the fields of healthcare, nutrition, water, education and sustainable development to international markets. This includes providing training, consulting services, licensing and distribution of products and solutions developed by Swiss companies and institutions. The goal is to promote the health and well-being of people and support sustainable solutions for a better future.

Orbisfy Sàrl 

Geneva · Since 2020

The company Orbisfy supports other companies in the development of sustainable products and services through consulting, engineering and sustainability expertise. The core activity consists of accompanying customers in the transformation of their products or services to achieve a positive impact on the environment and society, while simultaneously securing economic success.

Ordecsys Sàrl 

Chêne-Bougeries · Since 2002

The core activity of ORDECSYS is the conduct of techno-economic analyses, research and consulting in the field of energy and climate policy, particularly in the modeling of energy systems, the evaluation of climate strategies and the development of methods to reduce greenhouse gas emissions. The company supports customers in decision-making in complex, uncertain environments and develops solutions for a sustainable energy economy and climate policy.

Oread GmbH 

Zug · Since 2009

The core activity of Oread is the development, manufacture and distribution of products for the containment, control and cleaning of oil and chemical spills, in particular oil absorbents, oil barriers, emergency kits and other products for hazardous substance storage and disposal.

Origine-food SA 

Servion · Since 2023

Origine-food SA is a food distributor that imports and distributes organic and fair-trade brands in Switzerland through a network of specialty retailers and B2B channels. The company provides market-entry support, import and logistics services, and promotional and training activities for brands and retailers.

Orniplan AG 

Zurich · Since 1992

The core activity of Orniplan AG is consulting, planning and preparing expert opinions in the field of nature, particularly in the areas of ornithology, species conservation, biodiversity and nature conservation. This includes, among other things: surveys and monitoring of animal species and habitats, preparation of expert opinions and studies on nature conservation topics, planning and implementation of species conservation and species promotion projects, biomonitoring and success control of nature conservation measures, consulting and supporting authorities and private individuals in nature conservation issues, conducting courses and excursions on nature conservation topics, and developing concepts for the design and management of habitats.

OrtsWerte GmbH 

Sempach · Since 2011

The core activity of OrtsWerte GmbH is the design and accompaniment of settlement developments, particularly in the area of town centre upgrading. The company supports municipalities and property owners in the development of town centres and districts through location-specific analyses, role allocation, stakeholder coordination and the creation of scenarios for sustainable development.

OSEA Öl- und Strassenschlammentwässerungs AG 

Glattbrugg · Since 1988

OSEA Öl- und Strassenschlammentwässerungs AG operates a receiving facility for road-borne wastes and oil-containing wastewater, offering 24/7 acceptance and on-site washout for suction vehicles and street sweepers. The company dewaters street sweepings and collector sludges for material recovery in group internal wet‑mechanical processing plants and treats oil-bearing and contaminated wastewaters by a two-stage chemical–physical process, with concentrated residues sent for incineration.