We procure goods and services externally for our group companies and/or other participating interests. In addition, we are the legal employer of staff working for N.V. Nederlandse Gasunie. Our net revenue consists almost entirely of the sums we charge to our group companies and/or other participating interests for the activities of our personnel and/or the supply of externally procured goods and services to our group companies and/or other participating interests. We act as principal with regard to our group companies and/or other participating interests.