Private · Person · registered roles
Martin Siem
Active in 24 companiesChair · Board memberOslo & Halden
↳ Brreg · company_people
Role timeline
M3 Management AS
Styremedlem
Hanekleiva Eiendom AS
Styremedlem
M3 Næring AS
Styrets leder
Oreberg AS
Styremedlem
M3 Boliger Invest AS
Styremedlem
M3 Boliger AS
Styremedlem
M3 Boliger 2 AS
Styrets leder
M2 Næringsutvikling AS
Styremedlem
since 2017 · bars start at the registry's change date — full periods are not published
Across their companies24 · rolled up
Combined revenue
kr 336.9M +
Tenders won
0
Status
all active
Reach
4 industries
Brreg roles + Regnskap · rolled up across their companies — includes historical roles
Reach by industry
Rental and operating of own or leased real estate
10
Development of building projects
8
Buying and selling of own real estate
2
Business and other management consultancy activities
1
Other real estate activities on a fee or contract basis
1
Other support activities for transportation
1
Recent role changes
2026-07-09Became Styrets leder — Expo Holding AS
2026-04-22Became Styremedlem — M3 Atlas Utvikling AS
2026-04-22Became Styrets leder — Dalsveien Utvikling AS
2026-04-22Became Styrets leder — M3 Atlas Boliger 3 AS
2025-11-01Became Styrets leder — M3 Norefjell AS
Signals
Multiple boardscurrent board roles at 2+ companies
computed from Brreg roles