While the title would seem misleading to some, UP and NS are proposing to merge into a single "railroad" company in 2027, subject to shareholder and STB approval. The company will retain the UP name. The blurb states:
Union Pacific and Norfolk Southern announced an agreement to create America’s first transcontinental railroad. These legendary companies will seamlessly connect over 50,000 route miles across 43 states from the East Coast to the West Coast, linking approximately 100 ports and nearly every corner of North America. This combination will transform the U.S. supply chain, unleash the industrial strength of American manufacturing and create new sources of economic growth and workforce opportunity that preserves union jobs.
https://www.up-nstranscontinental.com/