The fact that an undertaking has a very significant turnover in the Union and provides a core platform service in at least three Member States constitutes compelling indication that that undertaking has a significant impact on the internal market. This is equally true where an undertaking providing a core platform service in at least three Member States has a very significant market capitalisation or equivalent fair market value. Therefore, an undertaking providing a core platform service should be presumed to have a significant impact on the internal market where it provides a core platform service in at least three Member States and where either its group turnover realised in the Union is equal to or exceeds a specific, high threshold, or the market capitalisation of the group is equal to or exceeds a certain high absolute value. For undertakings providing core platform services that belong to undertakings that are not publicly listed, the equivalent fair market value should be used as the reference. It should be possible for the Commission to use its power to adopt delegated acts to develop an objective methodology to calculate that value.