Why did the Surface Transportation Board (STB) delay its review of the UP-NS merger application?

The STB delayed its review because several aspects of the revised merger application were deemed 'unclear or underdeveloped' and require supplementation to enable a thorough evaluation of whether the transaction is in the public interest; specifically, the STB requested additional information on enhanced competition, service assurance plans, market share projections, and downstream merger impacts, and as a result, it placed the proceedings—including the environmental review—in abeyance pending submission and review of that supplemental information.

What is the position of the Alliance for Chemical Distribution (ACD) and the Stop the Rail Merger Coalition on the UP-NS merger?

The ACD maintains its opposition to the merger, stating that the STB’s acceptance of the application does not resolve serious concerns about threats to competition, service reliability, and the interests of shippers and consumers; the Stop the Rail Merger Coalition—including the American Chemistry Council, American Farm Bureau Federation, Teamsters Rail Conference, BNSF Railway, CPKC Railway, NITL, and Vinyl Institute—calls the proposal 'extremely flawed,' accuses UP and NS of overstating benefits, minimizing harms, and leaving critical questions unanswered, and concludes that 'this merger is a bad deal for America and must be rejected.'

US Regulator Accepts Revised UP-NS Merger Application, Delays Review to Collect More Data

May 28, 2026

The US Surface Transportation Board accepted a revised merger application between Union Pacific and Norfolk Southern but delayed the review to request additional data. Chemical industry trade groups oppose the deal, citing concerns over reduced competition and increased shipping costs for their sector.

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US Regulator Accepts Revised UP-NS Merger Application, Delays Review to Collect More Data

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