Check out the companies making headlines after the bell Monday:
Norfolk Southern - The company warned investors that it expects to report first-quarter diluted earnings of $1 per share, a 15 percent decrease from a year ago, on revenue of about $2.6 billion, a 5 percent decline from the year earlier.
The stock tumbled more than 4 percent after the announcement as analysts had expected the railroad company to report earnings of $1.25 a share on $2.67 billion.
Norfolk cited reduced fuel-surcharge revenue and lower export volume among the headwinds impacting sales. It said volume is expected to rebound in the current quarter with the "exception of coal, which will continue to be pressured given current market dynamics."
Shares of fellow transportation supplier CSX fell about 2 percent, in sympathy, following the Norfolk announcement.
Best Buy - The electronics retailer said Chairman Hatim Tyabji would retire in June and named CEO Hubert Joly as his successor. Shares rose about 1 percent, before turning flat in after-hours trading.
Pep Boys - The automotive supplier reported a fourth-quarter net loss of 50 cents per share, compared to a loss of 6 cents a share a year ago. On the top line, the company said revenue increased about 1 percent to $502.4 million. The stock whipsawed in thin trading after the announcement.