| # | Company | Employees |
|---|---|---|
| 1 | 11,328 | |
| 2 |
Oslo kommuneoslo.kommune.no
Oslo municipality, one of Norway's largest employers with 50,000 employees, develops the capital and provides services for residents, contributing to a thriving city |
9,409 |
| 3 |
Oslo University Hospitaloslo-universitetssykehus.no
Norway's largest hospital with national responsibilities and centers of competence, employing professionals in various disciplines and seeking top talent |
9,103 |
| 4 |
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 |
| 5 |
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 |
| 6 |
Posten Bring ASpostenbring.no
A Nordic company providing complete solutions in communications and logistics, aiming to simplify everyday life and connect the world |
4,620 |
| 7 |
Statens vegvesen - Norwegian Public Roads Administrationvegvesen.no
National authority responsible for planning, constructing, and operating road networks, vehicle inspection, driver training, licensing, and subsidizing ferry operations |
4,589 |
| 8 |
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 |
| 9 |
Skatteetatenskatteetaten.no
The company ensures funding for the welfare system by ensuring contribution compliance, with a diverse workforce and leading IT capabilities |
4,061 |
| 10 |
Bane NOR
Responsible for managing and maintaining the railway network in Norway, including tracks, stations, and traffic control |
3,920 |
| 11 |
Statnett SF
The company operates the main power grid in Norway, transmitting electricity between regions and countries while developing and maintaining the network for future energy demands |
2,018 |
| 12 |
BW Offshorebwoffshore.com
Engineering and operating floating production storage and offloading vessels, providing tailored offshore energy solutions for global markets. |
1,943 |
| 13 | 1,635 | |
| 14 |
Hurtigrutenhurtigruten.com
The company specializes in offering unique small-ship and land-based adventures from pole-to-pole, pushing boundaries on expedition travel and promoting sustainability |
1,563 |
| 15 |
Color Linecolorline.no
A leading European company in ferry transportation with 2500 employees, annually carrying 4 million passengers, 900,000 cars, and 180,000 freight units Vision to excel in cruise and transport services |
1,468 |
| 16 |
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 |
| 17 | 1,387 | |
| 18 |
Forsvarsbyggforsvarsbygg.no
Norway's largest public property operator delivering buildings and facilities to the military, managing vast natural areas, and employing a diverse range of professionals |
1,285 |
| 19 |
Sporveien ASsporveien.no
The company is Norway's largest provider of public transportation, managing infrastructure, operations, and maintenance to ensure a sustainable and efficient public transport system in Oslo |
1,227 |
| 20 |
Akershus fylkeskommuneafk.no
Large municipality focusing on providing quality services to residents in the region with the highest population in the country |
1,201 |
| 21 |
Oslo politidistriktpolitiet.no
The company is the largest police district in Norway, responsible for a significant portion of the country's crime rates, with multiple national-level tasks |
1,141 |
| 22 |
Norwegian Institute of Public Healthfhi.no
A leading institute focused on improving public health, conducting research, health surveillance, and collaborating globally on health issues |
1,097 |
| 23 |
Fremtindfremtind.no
Innovative insurance solutions tailored for a digital world, offering products that cater to individuals and businesses' varying needs for a safer everyday life |
1,052 |
| 24 |
Lovisenberg Diakonale Sykehuslovisenbergsykehus.no
Local hospital in Oslo providing medical services to four City Districts, offering psychiatric care and palliative care through a range of specialized departments |
993 |
| 25 | 978 | |
| 26 |
Hafslundhafslund.no
One of Norway's leading energy producers focusing on hydropower, system services, wholesale power trading, and innovative electrification projects for a cleaner environment |
957 |
| 27 |
Arbeids- og velferdsdirektoratetnav.no
The company oversees the management and development of the Norwegian Labour and Welfare Administration to achieve specified goals and expectations set by the government |
884 |
| 28 |
Diakonhjemmet sykehusdiakonhjemmetsykehus.no
An ideal local hospital offering medical, surgical, rheumatology, mental health, and specialized treatment for substance use disorders to a wide patient base |
862 |
| 29 |
Norlandianorlandia.no
Norlandia Care focuses on providing high-quality care services to patients in nursing homes, patient hotels, BPA, and home care, with expertise in both areas |
840 |
| 30 |
NSB Persontognsb.no
Focused on becoming customers' favorite and the most innovative transport group in the Nordics, offering personal transportation services |
829 |
| 31 | 774 | |
| 32 |
Nettbuss ASnettbuss.no
Leading public transport operator in Scandinavia, founded in Norway in 1925 Operates 3,300 buses in Norway and Sweden with 7,400 employees |
744 |
| 33 |
Protector Forsikring ASAprotectorforsikring.no
A non-life insurance company established in Norway in 2004, expanding to Sweden, Denmark, UK, and Finland Focused on profitable growth through unique relationships and cost-effective solutions |
715 |
| 34 | 700 | |
| 35 |
HΓΆegh 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 |
| 36 |
DNB Marketsdnb.no
Offers various financial products, services like foreign exchange, bonds, equities, commodities, corporate finance, real estate, and securities services. |
489 |
| 37 | 456 | |
| 38 |
SB1 Marketssb1markets.com
A leading investment bank in Norway offering asset management, research, financial advisory, fund raising, and brokerage services to various client segments |
286 |
| 39 |
Landkredittlandkreditt.no
A medium-sized Norwegian financial group offering banking, fund management, insurance, and real estate brokerage services to meet all your needs |
254 |
| 40 |
SpareBank 1 Forsikringsparebank1.no
A leading Norwegian pension company with satisfied customers offering deposit-based pension, collective disability coverage, and private pension savings Partnered with SpareBank 1 Group |
181 |
| 41 | 160 | |
| 42 |
Den Norske Krigsforsikring for Skib (DNK)warrisk.no
An insurance company based in Oslo, Norway, specializing in maritime insurance (Krigsforsikring) for ships |
146 |
| 43 |
Landkreditt Banklandkreditt.no
A banking institution within Landkreditt Group, providing mortgage loans, savings products, and full retail banking services to private and agricultural customers |
120 |
| 44 |
Oslo Pensjonsforsikring ASopf.no
An Oslo-based insurance group managing pensions and insurance for public sector clients, with a strong financial standing and efficient operations |
108 |
| 45 |
Instabank ASAinstabank.no
A Norwegian digital bank prioritizing customer experience, offering savings, insurance, and unsecured loans in Norway, Finland, and Sweden with focus on accessibility and innovation |
72 |
| 46 |
PKH - Pensjonskassen for helseforetakene i hovedstadsomrΓ₯detpkh.no
This company provides pension services for healthcare employees in the Oslo area, emphasizing reliability, transparency, and simplicity in pension management |
30 |
| 47 |
Cultura Bankcultura.no
A savings bank prioritizing social and ethical projects, offering basic banking products and financing organic agriculture, education, healthcare, and cultural activities |
30 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Oct 24, 2026.
More company lists in Oslo
- The largest companies in Oslo 681
- SaaS companies in Oslo 91
- Software Development companies in Oslo 86
- Retail chains in Oslo 74
- Financial services firms in Oslo 50
- Financial Services companies in Oslo 40
- IT Services and IT Consulting companies in Oslo 39
- Government Administration companies in Oslo 36
- Retail companies in Oslo 30
- Public sector organisations in Oslo 28
- IT services companies in Oslo 27