20 Biggest Mid-Day Gainers For Tuesday - Aviat Networks (NASDAQ:AVNW), Alibaba Gr Holding (NYSE:BABA), Douglas Dynamics (NYSE:PLOW), D.R. Horton (NYSE:DHI)

GenVec Inc GNVC shares surged 39.7 percent to $6.34 after Intrexon Corp XON announced plans to buy GenVec at $7 per share.
Amtech Systems, Inc. ASYS climbed 35.3 percent to $5.56. Amtech reported FY17 year-to-date order bookings of around $84 million.
Multi Packaging Solutions Intrntnl Ltd MPSX surged 23.6 percent to $17.79 after WestRock Co WRK agreed to acquire the company for $18.00 per share.
Allegheny Technologies Incorporated ATI shares jumped 20.7 percent to $20.50 after the company reported a narrower-than-expected Q4 loss.
Aviat Networks Inc AVNW shares gained 20.1 percent to $12.43. Aviat Networks shares have climbed 34.77 percent over the past 52 weeks, while the S&P 500 index has gained 20.68 percent in the same period.
MarineMax Inc HZO rose 16.8 percent to $21.25 after the company posted strong Q1 results.
Intevac, Inc. IVAC gained 16.3 percent to $9.65. Intevac is expected to announce Q4 results on February 1, 2017.
Cellectar Biosciences Inc CLRB shares climbed 15.8 percent to $1.60 after the company reported that an additional US patent has been granted for CLR 131 and CLR 125 in a broad range of solid tumors.
Northern Dynasty Minerals Ltd NAK shares climbed 14.7 percent to $3.39 after climbing 12.55 percent on Monday.
Orchids Paper Products Company TIS rose 11.3 percent to $28.57 after the company disclosed that it has entered into amendment to its credit agreement.
II-VI, Inc. IIVI gained 10.8 percent to $34.80. II-VI posted upbeat Q2 results and issued a strong Q3 forecast.
Mercury Systems Inc MRCY surged 10.6 percent to $34.78 after the company posted stronger-than-expected Q2 profit.
ResMed Inc. RMD rose 9.2 percent to $69.45 on strong Q2 results. JP Morgan upgraded ResMed from Neutral to Overweight.
GoPro Inc GPRO shares climbed 9 percent to $10.24. Pacific Crest raised estimates for GoPro. The company is expected to post quarterly earnings on February 2.
AK Steel Holding Corporation AKS rose 5.7 percent to $9.81 on better-than-expected quarterly earnings.
D.R. Horton, Inc. DHI gained 5 percent to $30.18 after the company posted upbeat Q1 earnings.
Douglas Dynamics Inc PLOW rose 4.4 percent to $33.55. Craig-Hallum initiated coverage of Douglas Dynamics with a Buy rating.
Yahoo! Inc. YHOO gained 4 percent to $44.06 after the company reported stronger-than-expected results for its fourth quarter. Yahoo stated the merger deal with Verizon will be delayed a quarter, but expects it to close in the second quarter in 2017.
Silgan Holdings Inc. SLGN gained 4.1 percent to $59.76. BMO Capital upgraded Silgan from Market Perform to Outperform.
Alibaba Group Holding Ltd BABA shares rose 3 percent to $101.36 after the company posted upbeat revenue for its third quarter and raised its 2017 revenue guidance.

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