The company is late in reporting its annual result for the year ended Dec. 31, after it identified material weaknesses in its internal controls. Investors should be wary of investing in a company that's late in filing. Second among energy stocks today was Arch Coal (NYSE: ACI) up 2.42% to $5.08, while in third was Peabody Energy ( BTU ), up 1.15% to $20.15. Coal stocks been crushed as environmental regulations pushed up the price of running coal plants and cheap natural gas provided an easy and cheaper alternative for power producers.