The article examines how newer EU member states like Poland, Bulgaria, and Latvia have influenced EU energy security policy from 2004 to 2013. It suggests that these countries have shaped EU policy by promoting their own national preferences. Factors like supply disruptions, diplomatic skills, Russia's influence, regional alliances, and administrative capacity play a role in determining the extent of their influence. The study also looks at the history of EU energy policy and analyzes case studies of the three countries to understand their impact on shaping EU energy policy.