Union Pacific's $85 billion bid for Norfolk Southern got rejected by regulators once already
Summary
Union Pacific's proposed $85 billion acquisition of Norfolk Southern — the first coast-to-coast railroad merger in U.S. history — would create a 52,215-mile network almost 60% bigger than today's largest railroad. Regulators rejected the companies' first merger application outright in January 2026; the resubmitted version was accepted in May with a growing list of gaps still to fill before a decision, expected no earlier than 2027.
Follow the deal
Announced July 29, 2025, the transaction values Norfolk Southern at $85 billion in stock and cash; analysts put the combined company's total enterprise value above $250 billion once debt and existing assets are counted in.
View data as table
| Transaction value | $85B | stock and cash |
|---|---|---|
| Combined enterprise value | $250B+ | estimated |
The $85 billion price tag buys access to a network that doesn't exist yet in the U.S.: 52,215 route miles across 43 states, touching roughly 100 ports and 10 international gateways to Canada and Mexico. Out of the country's roughly 140,000 miles of Class I track, a combined Union Pacific-Norfolk Southern would control nearly half of all U.S. rail traffic under a single company.
The same system, counted in track
A deal this size isn't measured well in dollars alone — the real before-and-after is how much physical network one company would control.
View data as table
| BNSF (current largest) | 32,500 mi | route miles, 28 states |
|---|---|---|
| Combined UP-NS (proposed) | 52,215 mi | route miles, 43 states |
BNSF currently runs the largest U.S. freight network at 32,500 route miles across 28 states. A combined Union Pacific-Norfolk Southern would run 52,215 miles across 43 states — about 60% more track than today's biggest railroad, and enough to be the largest single rail network in U.S. history if approved.
A deal that already stumbled once
Size alone doesn't get a merger like this approved — the Surface Transportation Board (STB) reviews Class I combinations under rules written after the last wave of megamergers in the 1990s, and it hasn't been shy about sending this one back. Union Pacific and Norfolk Southern filed their formal merger application on December 19, 2025. The STB rejected it outright on January 16, 2026, citing gaps in the filing. The companies came back with an amended application on April 30, 2026, which the STB accepted on May 28, 2026 — but only after flagging that "several aspects of the revised application... are unclear or underdeveloped," with supplemental data due July 27, 2026. From the date of that acceptance, the STB has 12 months to complete its evidentiary review. Union Pacific and Norfolk Southern still expect the deal to close in early 2027, but the process has already run slower, and hit more resistance, than the companies' original timeline assumed.
The takeaway
- The price tag is really a network tag. $85 billion buys 52,215 route miles and a network about 60% larger than the current record holder — the deal is priced on reach, not just revenue.
- Regulators are not rubber-stamping this one. A rejected first application and a still-incomplete second one show the STB treating a merger of this size with real scrutiny, not routine approval.
- "Coast to coast" also means "half the country's rail traffic." Eliminating the Chicago interchange bottleneck is the deal's selling point; concentrating nearly half of U.S. rail traffic in one company is the tradeoff regulators are weighing against it.
Deal-value and network-size figures are as announced or estimated by the companies and industry analysts and may change before the merger closes, if it closes. STB review dates reflect the public record as of this writing; the STB's evidentiary schedule may be extended.
Sources
- Union Pacific, merger announcement (July 29, 2025) — deal structure and the "first transcontinental railroad" framing. up.com
- FreightWaves — the $85 billion transaction value in stock and cash. freightwaves.com
- Trains Magazine — combined network size (52,215 miles, 43 states, ~100 ports) and industry-concentration context. trains.com
- Commerce Express, "U.S. Class I Freight Railroad Networks" — BNSF's current network size (32,500 miles) for comparison. commerceexpressinc.com
- Surface Transportation Board, press release PR-26-13 — the STB's acceptance and hold on the revised merger application. stb.gov
- Surface Transportation Board, press release PR-26-09 — the STB's request for completeness comments on the revised application. stb.gov
- Railway Age — the STB's acceptance of the revised application and delayed proceedings timeline. railwayage.com
Comments
Always open. Logged-in readers can annotate paragraphs in place.
No railroad has ever run coast to coast under one owner. Every previous Class I merger stopped at the Mississippi River or Chicago, leaving freight to change hands — and lose time — at the interchange. Union Pacific's bid for Norfolk Southern is designed to erase that line entirely, and the price tag reflects it.