Benzinga's Top Pre-Market Gainers

WCA Waste Corporation (NASDAQ: WCAA) surged 29.94% to $6.38 in the pre-market session. WCA Waste Corp agreed to be bought by Macquarie Infrastructure Partners II for around $526 million.

Schlumberger NV (NYSE: SLB) moved up 4.73% to $70.91 in the pre-market session. SLB's PEG ratio is 0.79.

Tibco Software Inc (NASDAQ: TIBX) added 4.55% to $23.00 in the pre-market session. Tibco Software reported a 38% surge in its fiscal fourth-quarter profit.

Salesforce.com Inc (NYSE: CRM) soared 4.01% to $103.00 in the pre-market trading. CRM's trailing-twelve-month revenue is $2.09 billion.