Radiant Systems Inc (NASDAQ:

) shares surged 30.72% to $28.04 at 10:28 am. The volume of RADS shares traded was 24110% higher than normal. NCR Corp agreed to buy RADS for $1.2 billion in cash. Clean Energy Fuels Corp (NASDAQ:

) shares moved up 13.72% to $14.92. The volume of CLNE shares traded was 333% higher than normal. CLNE shares have dropped 13.28% over the past 52 weeks, while the S&P 500 index has gained 22.32% in the same period. MedQuist Holdings Inc (NASDAQ:

) shares rose 5.53% to $13.93. The volume of MEDH shares traded was 185% higher than normal. MEDH agreed to buy M*Modal for about $130 million in cash. Wintrust Financial Corporation (NASDAQ:

) shares gained 4.90% to $34.44. The volume of WTFC shares traded was 161% higher than normal. WTFC's subsidiary bank, Northbrook Bank & Trust Company, bought First Chicago Bank & Trust in an FDIC-assisted transaction.