BNSF CEO Katie Farmer criticized the latest regulatory filing for the proposed merger between Union Pacific (UP) and Norfolk Southern (NS). Farmer stated the merger would raise rates for shippers, increase prices for consumers, and reduce competition, despite UP and NS's attempts to demonstrate otherwise. She warned that the combined entity, which would control a significant portion of North American rail traffic, would harm the American economy and broader supply chain. The criticism follows UP and NS's supplemental filing requested by the U.S. Surface Transportation Board (STB).