STB Freezes UP-NS Merger Review; CN Backs Call for More Data (UNP)

What happened

The U.S. Surface Transportation Board has frozen the proposed Union Pacific–Norfolk Southern merger and required additional information before the review can advance. Canadian National publicly stated its support for the STB's decision, arguing the regulator was correct to pause the process and seek greater transparency. CN, a competing Class I railroad, has a direct competitive interest in the outcome of any major rail consolidation involving UP and NS. The STB's action introduces procedural uncertainty into the merger timeline.