SLCA Stock Crowded With Sellers By: Energy Stock Channel September 24, 2015 at 11:51 AM EDT In trading on Thursday, shares of US Silica Holdings, Inc. (SLCA) entered into oversold territory, changing hands as low as $16.12 per share.. Read More >> Related Stocks: S&P Oil & Gas Eqpt & Services SPDR U.S. Silica Holdings Inc