Take a look at some of Wednesday's midday movers:
Teva Pharmaceuticals fell after its CEO resigned amid reports of boardroom tensions.
Tesla said it expects to sharply increase the number of lithium ion battery cells it receives from Japan's Panasonic in a deal that underscores the carmaker's confidence in the future of electric cars. Still, its shares fell.
Merrimack Pharmaceuticals plummeted after its cancer drug failed a mid-stage study in patients with advanced ovarian cancer.
Infosys came off its lows after it said it reached a $34 million visa settlement with the Department of Justice.
Hess fell after the oil and natural gas producer reported a lower-than-expected third-quarter profit as unrest in Libya and asset sales pressured production.
Spirit Airlines dropped despite posting better-than-expected quarterly earnings and revenue.
Volkswagen moved higher as operating profits rose on slower sales.
BorgWarner lost ground despite a 65 percent rise in profits. The maker of automotive turbochargers and emission systems also raised its full-year forecast.
Sprint moved higher despite posting a third quarter revenue decline as the company maintained its financial targets for 2013.
Range Resources rose after the oil and gas company posted better-than-expected third-quarter earnings
Questcor Pharmaceuticals fell after the drugmaker revealed that federal regulators have joined an ongoing investigation of the company.
Coleman Cable rose on a Reuters report it's exploring a sale.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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