Union Pacific and Norfolk Southern file first round of supplemental merger data with STB

Union Pacific and Norfolk Southern have submitted the first portion of additional information requested by the Surface Transportation Board as part of the regulator’s review of their proposed transcontinental rail merger, according to industry reporting and a company release posted via Business Wire. The STB had conditionally accepted the revised merger application on May 28, then asked the companies for more details. The board set a July 27 deadline for the rest of the supplemental data, with the railroads indicating the filings would come in two parts, according to FreightWaves and the companies’ communications. The additional submissions matter procedurally because the start of the formal evaluation and environmental review was delayed pending the new materials. In the July 7 filing, the railroads addressed the STB’s questions about governance and control for three rail-related entities: the Terminal Railroad Association of St. Louis (TRRA), the Kansas City Terminal Railway (KCT), and TTX Company, FreightWaves reported. TRRA and KCT are terminal operations that handle interchange traffic between major Class I railroads, while TTX operates a freight car equipment cooperative. FreightWaves also described the ownership and role of other carriers in those entities, including that TRRA is jointly owned by multiple Class I railroads, with Union Pacific holding the largest share. Union Pacific and Norfolk Southern reiterated that they do not control TRRA and KCT today, and they said they would remain committed to not exercising control over them after a merger. They also offered divestiture as an option to preserve what they characterized as neutrality in terminal interchange governance, the reporting said. FreightWaves added that the companies argued their opponents were using TRRA in efforts to block or delay the merger. In the companies’ statement quoted by FreightWaves, Union Pacific and Norfolk Southern said the filing provides evidence that other Class I railroads opposing the deal are using TRRA “as a pawn,” including pointing to other carriers’ nonattendance at a special TRRA meeting convened for purposes related to reducing Union Pacific’s role. A second phase of supplemental information is expected to cover “enhanced competition” elements required by the STB, according to FreightWaves. The STB’s request, meanwhile, followed months of data gathering by the regulator before the railroads’ initial merger application was filed in December 2025, the industry outlet reported. Union Pacific and Norfolk Southern have framed their merger case as a strategy to reshape a major rail network spanning the country. In April 2026, the companies described an amended merger application filed with the STB that, among other items, included updated projections for shipper benefits. That context helps explain why the filings now focus on regulatory compliance and competitive effects, rather than on basic deal structure. Still, several specifics remain unclear from the public materials highlighted so far. Neither the FreightWaves report nor the reposted company release extract the full substance of every question the STB asked, and they do not lay out the complete list of data points or any quantified findings from the board’s next-stage review. The companies also did not, in the cited excerpts, specify what form the “enhanced competition” second filing will take beyond that thematic scope. Next, investors and rail customers will watch whether the STB accepts the supplemental materials as complete enough to advance formal proceedings and environmental review. They will also look for details about how the board and the railroads reconcile competition concerns, particularly around terminal and equipment arrangements that involve multiple large carriers.

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