STB Accepts UPNS Merger Application — But the Clock May Be Slowing Down

The biggest rail industry story of the week isn't whether the Union Pacific–Norfolk Southern merger will move forward—it's how much longer the process may take.

In the latest episode of FTR's Rail Market Update Podcast, Senior Analyst Joseph Towers breaks down the Surface Transportation Board's (STB) decision to officially accept the revised merger application as "complete." While the decision represents a major milestone, it also came with several requests for additional information that could push the merger timeline further into 2027—or even 2028.

The STB Says "Complete"—With Conditions

The STB's acceptance of the application allows the process to continue, but the Board made it clear that significant questions still need answers before the formal procedural schedule can begin.

Among the areas requiring additional detail:

• Proposed divestiture plans involving TRRA, KCT, and TTX
• Competitive impacts across commodity groups and rail networks
• Public benefits and market implications
• Effects on captive shippers and competition levels
• Potential downstream merger activity involving other Class I railroads

Union Pacific and Norfolk Southern have until July 27, 2026, to provide supplemental information, with the possibility of an additional 30-day extension.

For rail stakeholders hoping for a faster resolution, the latest decision likely extends the review process.

The STB appears focused on ensuring industry participants have adequate time to evaluate the merger's potential impacts before the case moves into the next phase. While the application cleared an important hurdle, the finish line remains a long way off.

Rail Traffic Remains Strong

Away from merger headlines, North American rail traffic delivered another positive week.

For the week ending May 23:

• Total rail traffic: +7.2% year-over-year
• Carloads: +3.8%
• Intermodal: +10.3%

Intermodal Posts Its Best Week of the Year

Intermodal continues to be one of the strongest performers in the rail market.

The 10.3% increase was driven by:

• 11.5% growth among U.S. Class I railroads
• Year-over-year gains at all four major U.S. Class I carriers
• Continued strength at CPKC
• Significant growth reported by Mexican carrier GMXT

Notably, this represented the strongest week of intermodal growth reported by U.S. railroads so far in 2026.

The Bottom Line

The STB's decision keeps the UPNS merger moving forward, but it also signals that regulators intend to take a thorough approach before establishing a procedural schedule. Meanwhile, rail traffic fundamentals remain encouraging, with strong growth across agriculture, automotive, metals, and intermodal activity helping offset weakness in coal and forest products.

For companies that depend on rail transportation, the coming months will provide critical insight into both the industry's competitive landscape and the health of freight demand.

Listen to the Full Podcast

Want deeper analysis on the merger timeline, rail traffic trends, and what they mean for the market?

Listen to the latest episode of FTR's Rail Market Update Podcast for the complete discussion from Senior Analyst Joseph Towers.