Industry code 74 · Telemark
Other professional, scientific and technical activities in Porsgrunn
There are 137 active companies in other professional, scientific and technical activities in Porsgrunn. 11 of them were registered in the last 12 months. Together they have 36 registered employees. The largest company is Kelda Dynamics AS with 18 employees. The oldest, Arbeidsmiljø- & Sikkerhetskompetanse DA, was founded in 2000. 24% are limited companies.
- Active companies
- 137
- New in the last 12 months
- 11
- Registered employees
- 36
- Share of limited companies
- 24 %
The largest companies in other professional, scientific and technical activities in Porsgrunn
Sorted by number of employees. Figures are from the Register of Legal Entities and the Register of Company Accounts.
| # | Company | Org. no. | Employees | Revenue | Founded |
|---|---|---|---|---|---|
| 1 | Kelda Dynamics AS | 912550206 | 18 | NOK 43 m | 2013 |
| 2 | Verditaksering Kjell Larsen AS | 921065981 | 9 | NOK 12.2 m | 2018 |
| 3 | Nord Taksering AS | 986593640 | 9 | NOK 16.4 m | 2004 |
| 4 | Per-Aage.com AS | 812134922 | – | NOK 449k | 2013 |
| 5 | Telerosa AS | 813133482 | – | NOK 1.6 m | 2014 |
| 6 | Kb Takst AS | 814787192 | – | NOK 944.9k | 2015 |
| 7 | Hanne Christophersen | 825526072 | – | – | – |
| 8 | Strand Design | 825829342 | – | – | – |
| 9 | Grethe J. Knudsen | 826451912 | – | – | – |
| 10 | Skorpen Bilder Og Farger | 828963252 | – | – | – |
| 11 | Skreddersydde Hjem Interiørdesigner Maiken Oppegaard | 829465442 | – | – | – |
| 12 | El-Tools AS | 829803372 | – | NOK 0 | 2022 |
| 13 | Hilma Bråthen | 835030342 | – | – | – |
| 14 | Marius Tofte Halvorsen Media | 835246752 | – | – | – |
| 15 | Inger Skreosen Kristoffersen Foto | 835553302 | – | – | – |
| 16 | Formium Design ANS | 887334072 | – | – | 2004 |
| 17 | Fotograf Joakim Maylove Moltzau | 897057832 | – | – | – |
| 18 | Jon Sandersen Media | 897396122 | – | – | – |
| 19 | Blomvik | 912453723 | – | – | – |
| 20 | Phuc Minh Nguyen | 913567498 | – | – | – |
| 21 | Studio Virvelvind Fotograf Kjersti Waskaas | 914741823 | – | – | – |
| 22 | Hekkelstrand Foto | 914964237 | – | – | – |
| 23 | Conzo AS | 915019137 | – | – | 2015 |
| 24 | Anker-Karlsen Consult | 915809413 | – | – | – |
| 25 | Wimp Invest AS | 916119704 | – | NOK 65.4k | 2015 |
Newest companies in other professional, scientific and technical activities in Porsgrunn
- Standal Sømdesign24 Aug 2026
- Smartlåst AS21 Aug 2026
- Amora Studio AS28 Jul 2026
- Kine Ternsten Bye30 Apr 2026
- Onyx 8 AS25 Apr 2026
- Emil3dprint AS25 Apr 2026
- Erik Pavels AS20 Feb 2026
- Jørgensen Uav Tjenester16 Feb 2026
- Viking Buildtech AS28 Jan 2026
- Eikedalen Engineering & Engines4 Dec 2025
Frequently asked questions
How many companies in other professional, scientific and technical activities are there in Porsgrunn?
The Register of Legal Entities lists 137 active companies in other professional, scientific and technical activities in Porsgrunn. 11 of them were registered in the last 12 months.
Which is the largest company in other professional, scientific and technical activities in Porsgrunn?
Kelda Dynamics AS is the largest by number of employees, with 18 employees. The organisation number is 912550206.
How many people work in other professional, scientific and technical activities in Porsgrunn?
The companies have 36 registered employees in total. The figures are based on employee counts in the Register of Legal Entities, and 3 of the 25 largest companies have reported employees.
How long have there been companies in other professional, scientific and technical activities in Porsgrunn?
The oldest active company, Arbeidsmiljø- & Sikkerhetskompetanse DA, was founded in 2000. 24% of the companies are limited companies.
Explore further
Other professional, scientific and technical activities in nearby municipalities
Sub-industries in Porsgrunn
Source: the Register of Legal Entities and the Register of Company Accounts. The overview shows active companies registered in the municipality with industry code 74. Figures are updated continuously.