Union Pacific's adjusted profit grew to $1.8 billion in the second quarter as merger rumors to swirl around the nation's largest railroad.

Union Pacific offers $20 billion cash and one share of its stock to buy Norfolk Southern Tuesday in a merger that could ...

followed by the 1999 split of Conrail between Norfolk Southern and CSX, which created backups in the East. To be approved, any major rail merger must show it will enhance competition and serve the ...