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RSM Hasner Kjelstrup & Wiggen AS

RSM Hasner and Kjelstrup & Wiggen merge to create Oslo’s 6th largest firm

3 October 2012
RSM Hasner, the Norwegian member firm of RSM, one of the world's largest global audit, tax and advisory networks, has completed a merger with Kjelstrup & Wiggen to create RSM Hasner Kjelstrup & Wiggen.