Alere Inc. (NYSE:ALR) was up 19.5% on Thursday . The stock traded as high as $39.45 and last traded at $37.60, with a volume of 6,629,097 shares trading hands. The stock had previously closed at $31.47.

Several equities research analysts have weighed in on ALR shares. Leerink Swann restated a “buy” rating and issued a $56.00 price objective on shares of Alere in a research report on Tuesday, July 12th. Canaccord Genuity upgraded shares of Alere from a “hold” rating to a “buy” rating and raised their price objective for the company from $44.00 to $56.00 in a research report on Friday, July 15th. Craig Hallum upgraded shares of Alere from a “hold” rating to a “buy” rating in a research report on Friday, April 29th. BTIG Research restated a “hold” rating on shares of Alere in a research report on Friday, July 15th. Finally, Jefferies Group restated a “hold” rating on shares of Alere in a research report on Thursday, April 21st. Six investment analysts have rated the stock with a hold rating and four have given a buy rating to the stock. The company currently has an average rating of “Hold” and an average target price of $53.63.

The stock has a market cap of $3.15 billion and a price-to-earnings ratio of 9.66. The firm has a 50-day moving average of $41.60 and a 200-day moving average of $45.27.

A number of large investors have recently bought and sold shares of ALR. GSA Capital Partners LLP boosted its stake in Alere by 249.0% in the fourth quarter. GSA Capital Partners LLP now owns 25,803 shares of the company’s stock valued at $1,009,000 after buying an additional 18,409 shares in the last quarter. Trexquant Investment LP purchased a new stake in Alere during the fourth quarter valued at $1,751,000. Marshall Wace LLP purchased a new stake in Alere during the fourth quarter valued at $4,585,000. Jennison Associates LLC boosted its stake in Alere by 124.1% in the fourth quarter. Jennison Associates LLC now owns 1,009,883 shares of the company’s stock valued at $39,476,000 after buying an additional 559,240 shares in the last quarter. Finally, Diamond Hill Capital Management Inc. boosted its stake in Alere by 12.1% in the fourth quarter. Diamond Hill Capital Management Inc. now owns 2,306,319 shares of the company’s stock valued at $90,154,000 after buying an additional 248,224 shares in the last quarter.

Alere Inc is a provider of health information through diagnostic tests. The Company operates through professional diagnostics, patient self-testing, consumer diagnostics and, corporate and other segments. The professional diagnostics segment includes an array of diagnostic test products and other in vitro diagnostic tests marketed to medical professionals and laboratories for detection of diseases and conditions within its areas of focus.

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