Shipper Groups Urge STB to Reject Union Pacific-Norfolk Southern Merger, Citing Insufficient Evidence and Competition Risks

Five Shipper Groups Move to Block UP-NS Transcontinental Merger

Five prominent U.S. shipper organizations—the Alliance for Chemical Distribution, American Chemistry Council, The Fertilizer Institute, and the National Industrial Transportation Group—filed a joint motion with the Surface Transportation Board (STB) this week, formally asking the regulator to reject the proposed merger of Union Pacific and Norfolk Southern. The groups argue the application fails to provide enough information to show that the deal would serve the public interest, especially under the stricter merger rules the STB adopted in 2001.

Those rules require applicants to carry a heavier burden: they must demonstrate how a merger will enhance competition, assess downstream effects, and show that claimed benefits cannot be achieved through alternative means. The shipper filing notes that UP and NS have not transparently shown how combining the two railroads would improve rail-to-rail competition for captive shippers—those served by only one railroad—or how the touted efficiencies would outweigh competitive harms. Nancy O’Liddy, executive director of the National Industrial Transportation League, said the merger would cause “grave competitive impacts that cannot be effectively remedied through the STB’s conditioning authority.”

The STB accepted the revised merger application for consideration in May but put the full review process on hold and ordered the railroads to submit supplemental information by July 27. UP and NS responded on that date with what they called “unprecedented” voluntary commitments: an expanded Committed Gateway Pricing program, preservation of rail options for 3-to-2 shippers as well as 2-to-1 shippers, new service level protections that allow temporary access to alternative rail service during integration, and a new rate relief process if public benefits are not delivered in a timely manner. UP CEO Jim Vena and NS President Mark George both emphasized that the merger would strengthen supply chains, shift freight from road to rail, and create union jobs.

Despite those pledges, industry observers see rising uncertainty. Paul Tonsager of IMS Advisory, who previously gave the merger a 60-40 chance of approval, now puts the odds at 50-50, partly because delays can invite further scrutiny and political pressure. The STB’s ultimate decision remains pending and will hinge on whether the board finds the expanded commitments sufficient to offset the anticompetitive effects of combining two of the four largest U.S. freight railroads.

Why the Opposition Is Gaining Traction — Competitive Harms, Regulatory Hurdles, and Political Calculus

The Scale of the Merger and Competitive Fears

If approved, a UP-NS combination would create the first true transcontinental railroad in North America, linking 23 states and major ports. That scale is precisely what alarms shipper groups. A single railroad controlling end-to-end coast-to-coast traffic could reduce routing choices, especially for bulk commodities and chemical shippers who often rely on one Class I carrier. The STB’s 2001 merger rules were written with exactly this scenario in mind, requiring applicants to prove that competition would be enhanced—not diminished. The shipper motion argues that UP and NS have failed to meet that standard, pointing to the lack of concrete data on how gateway pricing expansions or 2-to-1 access protections would truly replicate the competition that exists today between two independent railroads.

Regulatory Backdrop: The 2001 Rules Set a High Bar

The STB overhauled its merger framework after the wave of rail consolidation left many shippers with fewer options. The new rules put the burden squarely on merger applicants and excluded benefits achievable through alternatives such as trackage rights or joint ventures. This “show me” attitude explains why the shipper groups emphasize that the application lacks sufficient evidence even to pass the prima facie threshold—the initial screen that looks only at the sufficiency of the railroads’ filings. The joint motion essentially says that even in the most favorable light, the evidence submitted by UP and NS does not justify moving forward with a full review, let alone approval.

UP-NS’s Enhanced Commitments: Real Safeguards or Window Dressing?

The railroads’ July 27 package is genuinely novel: extending gateway pricing to bulk unit trains and preserving dual-rail access down to 2-to-1 shippers go beyond past merger conditions. Still, the commitments are largely process-based rather than structural. A shipper would need to trigger the temporary access mechanism only after service declines, and the new rate relief process depends on proving that public benefits are not being delivered—which could be contentious and slow. For captive shippers who would lose a second Class I option overnight, these backstops may feel thin compared with the pre-merger reality of having a genuine competitor on the rails. The STB will have to decide whether the promises are enforceable and meaningful enough to overcome the prima facie objection.

The Political and Procedural Timeline

The merger review is colliding with the midterm election calendar, and the STB’s composition could shift depending on the outcome. That injects an additional layer of uncertainty. While the board is independent, a prolonged review that stretches into a new administration or a changed Congress could alter the political appetite for approving a major rail consolidation. Paul Tonsager’s revised 50-50 forecast reflects both the weakness of the initial application and the risk that further delays will invite negative attention from lawmakers and shipper constituencies.

What This Means for Shippers, Investors, and the Freight Rail Landscape

For bulk and chemical shippers: The joint motion signals that significant portions of the shipping community remain unconvinced by the railroads’ commitments. If you rely on single-carrier service or highly captive lanes, now is the time to build alternative logistics plans—including truck or barge—and to formally engage with the STB by filing comments while the docket remains open. Do not assume the expanded gateway pricing will fully replicate competitive routing.

For logistics and supply chain managers at larger companies: Model the financial impact of a potential reduction in rail-to-rail competition on key lanes. Even if the merger is ultimately conditioned, the STB’s review may take many months. Use that window to negotiate new haulage or trackage agreements with other carriers and to strengthen contractual service guarantees that can be enforced independently of the merger outcome.

For investors in Union Pacific and Norfolk Southern: The shipper opposition and the lowered approval odds introduce material near-term risk. Any additional STB requests for information or an extension of the procedural schedule could depress the stocks. Conversely, if the board signals that the expanded commitments will be accepted, the shares could rebound. Watch for any vote schedule at the STB and for public statements from individual board members, as well as for any congressional letter or hearing on the topic.

For competing railroads: The merger’s potential to create a dominant transcontinental route would reshape competitive dynamics across the entire Class I network. Monitor shipper sentiment carefully: if captive shipper concerns gain traction, there may be opportunities to offer alternative routings or long-term contracts that lock in volume before any merger progresses.