What company should investors watch this earnings season?

Jim Cramer didn't pause for a second before replying. "Union Pacific (UNP - Get Report) ," he said.

The company is set to release earnings on Thursday, Oct. 25. Its earnings will follow Action Alerts Plus Holdings Amazon (AMZN - Get Report) and Alphabet (GOOGL - Get Report) . 

Union Pacific is up over 29% in the last year.