https://www.reuters.com/business/energy/russian-gas-flows-via-ukraine-last-days-transit-deal-crumbles-2024-12-30/

Russia and the Soviet Union spent half a century building up a major share of the European gas market, which at its peak stood at 35%, but the war in Ukraine has all but destroyed that business for Gazprom, Russia's state-controlled gas giant.

Moscow has lost its share to rivals such as Norway, the United States and Qatar since the 2022 invasion of Ukraine, which prompted the EU to cut its dependence on Russian gas.