Union Pacific Corp. agreed to acquire Norfolk Southern Corp. in a cash-and-stock transaction valued at $85 billion, forming a transcontinental rail behemoth in what stands to be the industry’s largest deal ever.

Union Pacific offers $20 billion cash and one share of its stock to buy Norfolk Southern Tuesday in a merger that could trigger the final wave of railroad mergers across the country

Union Pacific está interesado en comprar Norfolk Southern en un acuerdo valorado en 85.000 millones de dólares, en una fusión que