An updated edition of the May 5, 2025 article.In the world of investing, a wide moat describes companies with enduring competitive advantages that shield them from competitors — much like a moat safeguards a castle. Popularized by Warren Buffett, this investment approach focuses on businesses capable of maintaining strong profitability over the long run, thanks to factors such as unique market positioning, powerful brand loyalty, cost efficiencies, network effects and regulatory protections.Several companie ...