Shares of Penumbra, Inc. (PEN), a medical device manufacturer, gained 5% on Monday despite no corporate-specific news to influence the stock movement.
Currently, Penumbra's stock is climbing 5.23 percent, to $243.93 from previous close of $231.81 on a volume of 114,522. The stock has traded from $180.93 to $348.67 in the past 52-week period.
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