These Oslo-based companies primarily operate in financial services, retail, and transportation, with a strong presence of established mid-sized to large corporations. Key players include DNB, a major financial services group; SpareBank 1, offering banking and insurance; REMA 1000 i Norge, a grocery chain; and Vy, a Nordic transport group. The data highlights a concentration of companies with headquarters in Oslo, indicating a central hub for various industries in Norway.
Several companies on this list were founded in the late 19th and early 20th centuries, such as Gjensidige (1816), Coop Norge (1906), and Ahlsell Norge AS (1877), showcasing a long-standing industrial foundation in the region. There is also a mix of more recent ventures, like Oda (2013) in online groceries and reMarkable (2013) in electronics manufacturing, suggesting a blend of tradition and modern innovation.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 11,328 | ||||
| 2 |
SpareBank 1sparebank1.no
The company creates superior customer experiences, offering innovative banking and insurance services with a focus on technology, AI, and customer satisfaction |
5,543 | |||
| 3 |
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 | |||
| 4 |
REMA 1000 i Norgerema.no
A Norwegian grocery chain focused on offering high-quality products at the lowest prices, with a strong emphasis on sustainability and community involvement |
3,646 | |||
| 5 | 2,422 | ||||
| 6 |
Coop Norgecoop.no
Operates approximately 1300 grocery stores under six brands, building supply stores, cafes, and specialty shops owned by members. |
2,375 | |||
| 7 | 1,635 | ||||
| 8 |
Thon Hotelsthonhotels.no
A leading hotel chain in Norway, offering warm atmosphere, high service level, and positive guest experiences across Norway, Sweden, Denmark, Brussels, and Rotterdam |
1,351 | |||
| 9 | 887 | ||||
| 10 |
Ahlsell Norge ASahlsell.no
Providing a wide range of products and expert knowledge in various industries such as VVS, VA, electrical, tools, machinery, and protective equipment for simplified customer experience |
851 | |||
| 11 |
Tolletatentoll.no
A diverse team of professionals at the Norwegian Customs Service work to protect society from illegal trade activities and enforce customs duties and taxes |
650 | |||
| 12 |
Vipps MobilePayvippsmobilepay.com
A combined Nordic mobile wallet created by merging Vipps and MobilePay, dedicated to simplifying payments and empowering merchants to dream big |
636 | |||
| 13 | 605 | ||||
| 14 |
reMarkableremarkable.com
The company offers a tablet that mimics the experience of writing on paper, aiming to replace traditional notebooks and printed documents |
584 | |||
| 15 |
Peppes Pizzalive.peppes.no
A Norwegian pizza chain with approximately 90 locations in Norway, operating under a franchise model Established in 1970, now part of Dely AS |
541 | |||
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 |
Berg-Hansen Reisebureau ASberg-hansen.no
A leading travel agency offering comprehensive services for corporate and private customers, ensuring efficient and cost-effective travel solutions worldwide |
462 | |||
| 17 |
SpareBank 1 Utviklingsparebank1.dev
A leading technology partner for SpareBank 1 alliance, providing over one million individuals, businesses, and communities with secure and innovative financial solutions nationwide |
426 | |||
| 18 |
Dagbladetdagbladet.no
A Norwegian newspaper founded in 1869, known for its radical cultural coverage Offers news online and in print, focusing on thorough coverage of major stories |
378 | |||
| 19 |
FINN.no – mulighetenes markedvend.com
A leading online marketplace in Norway, with high user engagement, a strong brand reputation, and a focus on helping people make smart choices |
368 | |||
| 20 |
Nordvik Eiendomsmeglingnordvikbolig.no
A leading real estate brokerage chain in Norway with 33 offices, offering innovative and personalized services for buying and selling homes |
354 | |||
| 21 | 346 | ||||
| 22 |
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 | |||
| 23 |
Dibberdibber.com
One of Europe's largest networks of kindergartens promoting joyful learning and providing children with the foundation for development and self-improvement |
324 | |||
| 24 | 310 | ||||
| 25 |
Tripletex AStripletex.no
Cloud-based financial system with modular solutions for various industries, specializing in customized solutions for electrical, plumbing, and accounting sectors Focus on innovation, positive culture, and customer satisfaction |
292 | |||
| 26 | 221 | ||||
| 27 |
Oslo Taxioslotaxi.no
The company is Norway's largest taxi central, providing transportation services for over 7 million customers annually with around 2600 drivers |
185 | |||
| 28 | 146 | ||||
| 29 | 88 | ||||
| 30 |
Seminesemine.com
AI-powered platform automates invoice data capture, cost allocation, and workflow integration for medium to large enterprises and accounting firms. |
83 | |||
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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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