Union Pacific Norfolk Southern merger is drawing new questions after Canadian National said on Monday it asked the U.S. Surface Transportation Board to require Union Pacific and Norfolk Southern to disclose more detail in their proposed deal.

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Union Pacific and Norfolk Southern logos are seen in this illustration taken August 5, 2025. REUTERS/Dado Ruvic/Illustration/File Photo

This is reported by the railway transport news portal Railway Supply.

Canadian National motion with Surface Transportation Board

Canadian National said it filed a motion with the Surface Transportation Board, seeking an order that would compel the applicants to provide additional information. Union Pacific and Norfolk Southern submitted a nearly 7,000-page merger application to the regulator in December, setting in motion a review that could become one of the rail industry’s most significant transactions in decades.

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The $85 billion deal was announced in July. The companies say the combination would speed shipments by reducing handoffs and delays and would create the first U.S. coast-to-coast railroad. The proposal has drawn criticism from labor unions and rival railroads.

Competitive impact assessment and market-share projections

CN said the merger filing does not fully explain the companies’ competitive impact assessment. It pointed to incomplete market analyses, missing required market-share projections and other gaps it believes should be addressed under the new merger rules.

“Given the scale and stakes of the proposed combination, the applicants must meet the highest standard of transparency and compliance,” Canadian National said. It added that, rather than insisting there is “nothing to see here,” the applicants should focus on meeting the “rigorous and heightened” standard the updated rules call for.

Union Pacific and Norfolk Southern did not immediately respond to a request for comment.

Surface Transportation Board review timeline

The Surface Transportation Board review is expected to face intense scrutiny and could take 12 to 18 months, with the companies targeting an early-2027 close. In a note last week, BMO Capital Markets analyst Fadi Chamoun said that while the application describes compelling earnings and free cash flow under favorable outcomes, regulatory uncertainty remains elevated.

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