About us

An active and valuable discussion partner

Langseth Revision is an auditing firm based in Ryen, Oslo with eight employees, five of whom are state-authorised public accountants. We work closely on our engagements and aspire to serve as a valuable discussion partner for our clients within the prescribed guidelines. Langseth Revisjon AS is a member of The Norwegian Institute of Public Accountants.

Fredrik W. Langseth

State-Authorised Public Accountant and Partner

Birgitte Lilleengen

Registered Public Accountant

Ottar Langseth

State-Authorised Public Accountant

Kirsten Pedersen

State-Authorised Public Accountant

Ann Charlotte Guhnfeldt

Registered Public Accountant

Kenneth Hellen Braaten

State-Authorised Public Accountant

Anne Line Solberg

Registered Public Accountant

Torgeir Urke

State-Authorised Public Accountant


Partners of member firms of MGI Worldwide look after their clients personally. In the network we build close friendships with each other based on loyalty, respect and shared experience. We offer the personal touch not found in large firms.


MGI Worldwide members are mid-sized, owner managed firms. We share the same day-to-day business challenges as our clients and truly know what it means to be entrepreneurial. We understand your business and your aspirations, not just your accounts.


MGI Worldwide is in every continent and just about every key economic centre in the world. Today we have members in 81 countries but tomorrow it may be more. However complex a client requirement, someone in MGI will have the expertise to help.