Over the last five years, billionaire investor Warren Buffett's Berkshire Hathaway has achieved significant market-cap growth. However, some FTSE leaders like Centrica have actually outperformed Buffett's returns, with a 288% surge in stock price. Centrica's success can be attributed to the surge in wholesale energy prices following the war in Ukraine, leading to improved profit margins and strong free cash flow generation. The company has capitalized on this by reorganizing its business, enhancing its balance sheet, and investing in energy transition projects including hydrogen infrastructure. Despite positive institutional analyst projections of a further 30% increase in share price, Centrica still faces challenges such as regulatory price caps and uncertainties surrounding its investments in hydrogen and nuclear projects. Investors are advised to conduct thorough research to evaluate Centrica's long-term prospects amidst the evolving energy landscape.