These corporate groups and holding companies in Oslo are mainly active in construction, food and beverage, and renewable energy. The list includes established firms such as Statkraft, a global leader in renewable energy, and Veidekke Norge, a Scandinavian contractor. Other notable companies are TINE, a dairy products cooperative, and OBOS, a membership organization focused on housing.
Most of these companies have a long history, with several founded in the late 19th or early 20th century, like Statkraft (1895) and Multiconsult (1908). This indicates a presence of well-established businesses rather than newly formed ventures.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Statkraftstatkraft.com
A global leader in renewable energy generation, specializing in hydropower, wind power, solar power, and gas-fired power, with operations in 21 countries |
4,563 | |||
| 2 |
Strawberrylinktr.ee
Strawberry is a leading hotel company in the Nordics, offering a diverse range of hotels, meetings, restaurants, and spas Energized by values of energy, courage, and enthusiasm |
3,504 | |||
| 3 |
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 | |||
| 4 |
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 | |||
| 5 | 2,414 | ||||
| 6 |
Orkla Food Ingredients ASorklafoodingredients.com
A leading European bakery ingredients manufacturer and distributor with a wide range of products tailored for various customer channels worldwide |
1,889 | |||
| 7 | 1,864 | ||||
| 8 | 1,540 | ||||
| 9 | 1,507 | ||||
| 10 |
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 | |||
| 11 |
AF Gruppenafgruppen.no
A company focused on solving important societal issues, challenging the status quo, and creating new solutions for the future |
1,288 | |||
| 12 | 1,245 | ||||
| 13 |
BAMA Gruppen ASbama.no
A leading Nordic company specializing in fresh fruits, vegetables, berries, and potatoes, with a strong presence in Europe and a wide product range including flowers, drinks, and on-the-go products |
1,049 | |||
| 14 |
Glamoxglamox.com
A Norwegian industrial group that develops, manufactures, and distributes sustainable lighting solutions for professional markets worldwide, with a focus on marine, offshore, and building sectors |
996 | |||
| 15 | 774 | ||||
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 | 738 | ||||
| 17 | 704 | ||||
| 18 | 700 | ||||
| 19 |
NoA - The North Alliancethenorthalliance.com
A Nordic-based creative and tech group with over 1200 experts focused on driving customer-driven growth in Sweden, Norway, Denmark, Finland, and Poland |
623 | |||
| 20 |
LINK Mobilitylinkmobility.com
Provider of scalable mobile messaging services and digital communication solutions enabling businesses to connect with customers across various industries. |
613 | |||
| 21 |
Pareto Securitiesparetosec.com
Nordic-based financial services firm providing financing solutions and investment opportunities for companies and investors worldwide through industry knowledge and global network |
497 | |||
| 22 |
Mantena Nordicmantena.no
The company specializes in maintaining railway vehicles in the Nordic region, from large locomotives to advanced components, with a focus on innovation and timely delivery |
452 | |||
| 23 |
Unibuss ASunibuss.no
A transportation company in Eastern Norway operating over 700 route buses, 25 tour buses, and express services to airports with around 1,800 employees |
449 | |||
| 24 | 429 | ||||
| 25 | 403 | ||||
| 26 |
Gyldendal Norsk Forlaggyldendal.no
For nearly a century, the company has played a vital role in Norwegian society by creating and disseminating knowledge, literature, and entertainment |
397 | |||
| 27 |
The Norwegian Institute for Water Research (NIVA)niva.no
A nationally leading foundation specializing in environmental issues related to water, conducting research and sharing expertise to address water management globally |
362 | |||
| 28 | 357 | ||||
| 29 |
Baneservicebaneservice.no
Providing machine and contractor services for railway-related activities, specializing in construction and maintenance of tracks, signal systems, and more Owned by government |
356 | |||
| 30 |
Stiftelsen Norsk Luftambulansenorskluftambulanse.no
An ideal organization advancing life-saving medical care through air ambulance services, research, education, fundraising, and special training for pilots and medical personnel |
328 | |||
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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 11, 2026.
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