Harmonic - The provider of video-infrastructure services dropped after lowering its second-quarter guidance.
Manchester United - The English soccer club gained after signing a 10-year, $1.3 billion deal with Adidias.
Newmont Mining - The producer of gold, copper and silver declined along with the price of gold, with futures down more than 2 percent in Monday's session.
Perrigo - The provider of pharmaceuticals and nutritional products rallied after the Israeli financial daily Globes reported the company had hired an investment bank to explore options including a merger.
Riverbed Technology - The maker of network equipment fell after trimming its second-quarter revenue forecast.
Salix Pharmaceuticals - rose after it and Progenics Pharmaceuticals said federal regulators had cleared expanded usage of their constipation drug.
Stratasys - The maker of 3-D printers rose after Home Depot said it would begin selling the company's devices.
United States Steel - The company declined after the World Trade Organization supported some major claims by India against countervailing duties imposed by the U.S. on certain steel products.
United Technologies - The company gained after its Pratt & Whitney division announced a 10-year $1.1 billion agreement with Alcoa.
Wells Fargo - The bank fell after JPMorgan Chase downgraded it to neutral from overweight.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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