(109)Risk concentrations and intra-group transactions could affect the financial position of insurance or reinsurance undertakings. The supervisory authorities should therefore be able to exercise supervision over such risk concentrations and intra-group transactions, taking into account the nature of relationships between regulated entities as well as non-regulated entities, including insurance holding companies and mixed activity insurance holding companies, and take appropriate measures at the level of the insurance or reinsurance undertaking where its solvency is being or may be jeopardised.