CSX Launches Public Resource for UP-Norfolk Southern Merger Review

CSX Corp. has launched a public website to support stakeholders in the Union Pacific and Norfolk Southern merger review process. The proposed merger has raised concerns about industry balance and competitive routing options for rail shippers. CSX argues that the combination would reduce options for shippers, potentially creating an imbalance in the rail industry.

CSX launched a public website to help stakeholders engage with the Surface Transportation Board's review of the proposed $85 billion acquisition of NSC (Norfolk Southern) by UNP (Union Pacific) . Union Pacific resubmitted a revised merger application on April 30 after the STB rejected its initial filing in January as incomplete — regulators demanded projected market share data showing competitive effects, which the original application omitted.

CSX argues the revised filing still fails to address the competitive imbalance a combined UP-NS would create. A merged entity would control an estimated 40% of U.S. freight rail — territory currently split across five major railroads — raising shipper concerns about reduced routing options and pricing leverage . Comments on completeness of the revised filing were due May 8, with UP's reply due May 12. The STB has 30 days to accept the application before beginning a detailed review expected to last more than a year.

The STB has signaled it may apply a broader merger-review framework and has sought additional internal merger documents from the parties. For CSX, which operates in eastern corridors that overlap with Norfolk Southern's network, the outcome carries significant strategic weight. If approved, the merger would create America's first true transcontinental freight railroad and fundamentally reshape competitive dynamics for rail shippers coast-to-coast.

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