On 12 March 2021 the Eastern High Court found that HMN Naturgas I/S, two subcontractors and an industry association had illegally coordinated prices for the service of natural gas-fired boilers. The decision upholds the Maritime and Commercial High Court's 2019 judgment (for further details please see "Maritime and Commercial Court finds HMN and competitors guilty of illegal price coordination agreement"). Facts HMN Naturgas is Denmark's largest gas company, supplying gas to about a quarter-of-a-million households and companies. Its activities include conducting service checks on natural gas-fired boilers in private households. HMN Naturgas does not perform service checks on its own; instead, it relies on subcontractors (so called 'service partners'). Typically, these service partners would also independently offer service checks to customers. Therefore, HMN Naturgas's service partners are its competitors on the market for the service maintenance of gas boilers.