ISOLA HOLDING AS
Signals
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ISOLA HOLDING AS is registered as a limited company in Porsgrunn, Telemark with organisation number 813003252. The business is classified under manufacture of other non-metallic mineral products n.e.c. (NACE 23.990). The company was incorporated in 1968. Registered share capital is NOK 126.4m, divided into 5743800 shares. The company's stated purpose is: “Formuesforvaltning, herunder deltagelse i andre bedrifter og virksomheter, samt handel.”. The most recent filed accounts, for the 2025 financial year, show NOK 19.3m in revenue and NOK 4.3m in operating profit.
Key figures · 2025
Financial health · 2025
Who owns ISOLA HOLDING AS?
ISOLA HOLDING AS has 18 registered shareholders:
- SOLVEIG THIIS-EVENSEN 10.6%
- EINAR THIIS-EVENSEN 10.6%
- ANDERS SVERRE MARSTRANDER 7.5%
- CHRISTIAN LYDER MARSTRANDER 7.5%
- HALVOR SØREN MARSTRANDER 7.5%
- SVEND EVEN ANDERSEN HÆRRA 7.5%
- RUTH ELSEBETH HOFF 7.5%
- NIELS ERIK ANDERSEN 7.5%
- HÅKON THIIS-EVENSEN 6.0%
- MARTHE MARIE THIIS-EVENSEN 6.0%
- KAROLINE ELISE THIIS-EVENSEN 6.0%
- HARALD MARTIN THIIS-EVENSEN 5.9%
- ANDERS LYDER NICOLAYSEN MARSTRANDER 2.5%
- HARALD THIIS-EVENSEN 2.5%
- EYVIND MARTIN THIIS-EVENSEN 2.5%
- BORGHILD THIIS-EVENSEN ANDERSEN 2.5%
- NIKOLINE MØLMEN THIIS-EVENSEN 0.0%
- MINA MØLMEN THIIS-EVENSEN 0.0%
Which companies does ISOLA HOLDING AS own?
ISOLA HOLDING AS holds stakes in 5 companies:
- ISOLA AS 100.0%
- FLØYSAND TAK AS 100.0%
- ISOLA SKIFER ROGNE AS 100.0%
- HESSELBERGTAK AS 90.0%
- ISOLA SOLAR AS 66.0%
Group structure
ISOLA HOLDING AS er morselskap for 11 datterselskaper:
- FLØYSAND TAK AS 100%
- HESSELBERGTAK AS 90,00%
- ISOLA AB 100%
- ISOLA AS 100%
- ISOLA POWERTEKK S.R.O. 100%
- ISOLA SKIFER ROGNE AS 100%
- ISOLA SOLAR AS 66,00%
- HESSELBERGTAK BVT AS 80,00%
- NYE NORDLANDTAK AS 75,00%
- TRONDHEIM TAK AS 65,00%
- TAKTEKKING SØR ISOLA AS 66,00%
Frequently asked questions about ISOLA HOLDING AS
Who owns ISOLA HOLDING AS?
SOLVEIG THIIS-EVENSEN is the largest registered owner, with 10.6%.
What is the revenue of ISOLA HOLDING AS?
ISOLA HOLDING AS had revenue of NOK 19.3m in 2025.
Who is the general manager of ISOLA HOLDING AS?
Bjørnar Gulliksen is registered as general manager of ISOLA HOLDING AS.
Where is ISOLA HOLDING AS based?
ISOLA HOLDING AS has its business address in Porsgrunn.
Source: Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 02.09.2026.