This selection of publicly traded companies in Oslo shows a concentration of large, established firms. Key players include Yara International, specializing in sustainable crop nutrition, and Norsk Hydro, active in aluminum production and renewables. DNB is a major financial services group, while Gjensidige focuses on general insurance. Other significant companies are Veidekke Norge, a Scandinavian contractor, and Multiconsult, offering consulting and engineering services. These companies are primarily large enterprises with significant employee counts.
A notable characteristic of these companies is their long history, with several founded in the early 20th century or even earlier. Norsk Hydro was founded in 1905, Gjensidige in 1816, and Elkem ASA in 1904. Orkla ASA, an investment company, dates back to 1654. This suggests a mature corporate landscape in Oslo, with many firms having decades or even centuries of operational experience.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Yara Internationalyara.com
A global company focused on sustainable crop nutrition, low-emission energy solutions, and creating a more efficient and nature-positive food value chain |
15,349 | |||
| 2 |
Norsk Hydrohydro.com
Development of sustainable industries including aluminium production, energy, metal recycling, renewables, and batteries with global operations and innovation focus. |
13,192 | |||
| 3 | 11,328 | ||||
| 4 |
Gjensidigegjensidige.no
A top player in the Nordic general insurance market, offering insurance products in multiple countries, along with pension, savings, and healthcare services |
4,916 | |||
| 5 |
Veidekke Norgeveidekke.no
A leading Scandinavian contractor and property developer offering a wide range of construction services, road maintenance, and production of asphalt, gravel, and concrete |
3,458 | |||
| 6 |
Multiconsultmulticonsult.no
Multiconsult offers a wide range of consulting, engineering, and design services in various sectors, with a focus on meeting customer expectations and achieving satisfaction |
3,018 | |||
| 7 |
Atea Norge ASatea.no
Primary IT infrastructure supplier in the Nordic and Baltic regions, offering products, services, and specialist expertise to customers while listed on the Oslo Stock Exchange |
2,516 | |||
| 8 | 2,350 | ||||
| 9 |
Bouvet ASAbouvet.no
Leading Scandinavian consulting company providing technology, communication, and management services. Offers development and advisory services to public and private sector clients. |
2,325 | |||
| 10 |
BW Offshorebwoffshore.com
Engineering and operating floating production storage and offloading vessels, providing tailored offshore energy solutions for global markets. |
1,943 | |||
| 11 |
Elopakelopak.com
A leading global supplier of eco-friendly carton packaging and filling equipment, offering sustainable solutions to reduce plastic waste |
1,683 | |||
| 12 |
Scatec ASAscatec.com
Leading renewable energy solutions provider in emerging markets, developing, building, owning, and operating clean energy plants globally with over 46 GW capacity |
1,412 | |||
| 13 |
AF Gruppenafgruppen.no
A company focused on solving important societal issues, challenging the status quo, and creating new solutions for the future |
1,288 | |||
| 14 | 1,245 | ||||
| 15 |
StrongPointstrongpoint.com
Retail technology company offering solutions to enhance store operations, improve shopping experiences, and streamline online grocery shopping for businesses globally |
1,179 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 | 774 | ||||
| 17 |
H枚egh Autolinershoeghautoliners.com
Global shipping company, operating 11 trade routes with a fleet of around 40 vessels, specializing in ocean services for various cargo types worldwide |
620 | |||
| 18 |
LINK Mobilitylinkmobility.com
Provider of scalable mobile messaging services and digital communication solutions enabling businesses to connect with customers across various industries. |
613 | |||
| 19 |
Goodtechgoodtech.no
A leader in industrial automation and robotics, specializing in creating smarter, greener, and more sustainable solutions to optimize production processes and increase competitiveness |
601 | |||
| 20 |
ABG Sundal Collierabgsc.com
Nordic investment bank providing superior distribution of securities, top-ranked research, and corporate finance advisory services to local and international investors |
465 | |||
| 21 |
Webstepwebstep.no
A profitable technology and consulting firm with 400+ IT experts, providing uncomplicated solutions to complex problems for customers across industries |
430 | |||
| 22 |
Cool Company Ltd (CoolCo)coolcoltd.com
The company specializes in transporting clean natural gas as liquefied natural gas on a fleet of modern carriers |
384 | |||
| 23 | 325 | ||||
| 24 |
Nel Hydrogennelhydrogen.com
A hydrogen company listed on the Oslo Stock Exchange, specializing in hydrogen production plants, fueling stations, and power-to-gas solutions for various industries |
323 | |||
| 25 |
Arribatec Grouparribatec.com
Global provider of digital business solutions, focusing on ERP, system integration, and CPM Emphasizing innovative use of IT for competitive advantage |
294 | |||
| 26 | 229 | ||||
| 27 |
Frontline Management ASfrontlineplc.cy
A management company overseeing a Cyprus-based oil tanker company with one of the world's largest fleets, specializing in international crude oil transportation on major stock exchanges |
183 | |||
| 28 |
Photocurephotocure.com
Innovative technology improves bladder cancer treatment by making cancer cells glow pink, leading to better health outcomes for patients worldwide |
134 | |||
| 29 |
Vow ASAvowasa.com
A company and its subsidiaries specialize in converting biomass and waste into clean energy and valuable resources, promoting industry decarbonization and material recovery |
106 | |||
| 30 |
CAVOURcavour.com
A clothing company founded by brothers in 2013, focused on well-made, affordable garments that offer a custom-made feel Expanding internationally |
88 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
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