Cooperation with Denmark began in 2006, when an agreement on the supply of natural gas via the Nord Stream gas pipeline was signed. The agreement defined the main conditions for the purchase of Russian gas by the Danish company DONG Naturgaz A/S (currently ØrstedØrsted Salg & Service A/S (previously DONG) is the largest energy company in Denmark and one of the leaders in the energy market in the Northern Europe. Headquartered in the Danish city of Fredericia, the company employs 6,500 employees. The company was established in 1972 and was originally called Dansk Naturgaz. The monitoring of compliance with state interests in gas purchases in Norway was among its purposes. The discovery of oil and gas reserves in the Danish sectors of the North Sea in the late 1970s led to the expansion of the company's business.) for 20 years. Russian natural gas supply began on November 8, 2011 with the commissioning of the first string of the Nord Stream gas pipeline.

At the end of 2020, the volume of natural gas supplies to Denmark amounted to 1.85 bcm.