The title for operating the world's largest container ships is held by major global shipping lines such as MSC (Mediterranean Shipping Company) and COSCO Shipping, which operate ultra-large container vessels exceeding 24,000 TEU capacity. Ships like the MSC Loreto and various vessels in the Megamax class surpass previous historical size records through immense dimensions stretching over 400 meters in length and wide beams capable of stacking container tiers high across the deck. These floating engineering marvels are deployed primarily on high-volume Asia-Europe trade lanes to achieve maximum economies of scale in international maritime freight.