Quest Resource Holding Corporation to Participate in ROTH Cleantech Investor Day in London on June 25, 2015

FRISCO, TX–(Marketwired – Jun 23, 2015) – Quest Resource Holding Corporation (NASDAQ: QRHC) (“Quest“), a leader in sustainability, recycling, and resource management announced today that it will participate in the ROTH Capital Partners’ Cleantech Investor Day at the Dorchester Hotel in London, UK on June 25, 2015.