Penn Virginia Corporation (PVA) shares are plummeting following the company’s quarterly earnings report.

The company reported a loss of $5.90 a share for the fourth quarter, compared with a loss of 6 cents a share for the year-ago period. Additionally, Penn Virginia may be for sale.

Billionaire George Soros increased his hedge fund’s stake in the company to 9.53% and believes the company should sell. Bank of America Corp. (BAC) has been working with Penn Virginia, looking for potential buyers.

Revenue for the fourth quarter was down 13% from a year earlier to $102 million.

PVA stock is up 14.2% Thursday.

More From InvestorPlace