One of the biggest gainers, generator maker Generac Holdings, already upped its fourth-quarter sales guidance.

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Generac upped its sales expectations for the full year, and now expects revenue growth in the low 40% range.

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The session was not without its winners, few more so than Generac Holdings.

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There is a home generator company in the mix called Generac Holdings (GNRC).

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Generac Holdings, a maker of portable generators that surged to an all-time high after Superstorm Sandy hit the Atlantic coast in November, climbed to a fresh all-time high.

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And speaking of generators, Generac Holdings (GNRC), also in the motif, is one of the largest manufacturers of generators in the U.S. serving residential, commercial, industrial and construction markets.

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Generac Holdings (GNRC) has already seen a pop higher.

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Generac surged 17.4% Wednesday morning.

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