2025 was a decisive year in the evolution of the transatlantic energy relationship. What began as an emergency response to Europe’s sudden exposure to severe energy disruptions following Russia’s invasion of Ukraine in 2022 matured into a long-term strategic realignment. The Sixth Partnership for Transatlantic Energy Cooperation, which took place in Athens in November, underscored this shift, bringing together energy ministers, senior U.S. officials, and private-sector leaders to focus on