A123, Boingo, MDC, Quanex, Republic Airways: U.S. Equity Movers

Shares of the following companies had unusual moves in U.S. trading. Stock symbols are in parentheses and prices are as of 4 p.m. in New York.

A123 Systems Inc. (AONE US) climbed 11 percent to $5, the most since April 18. The lithium-ion battery maker was raised to “overweight” from “equal-weight” by Morgan Stanley, which said it expects the company to announce a major contract by January.

BioCryst Pharmaceuticals Inc. (BCRX US) gained 13 percent to $4, the highest level since March 9. The maker of an experimental influenza drug rose for a second day since researchers said the swine flu virus has evolved to resist treatment sold by rival companies.

Boingo Wireless Inc. (WIFI US) climbed 32 percent, the most since it went public in May, to $10.11. The operator of wireless Internet hot spots is “incredibly undervalued,” Chief Executive Officer Dave Hagan told CNBC. Separately, at least four analysts started covering the stock with a rating equivalent to “buy.”

EMS Technologies Inc. (ELMG US) surged 32 percent to $32.80, the highest price since at least February 1986. The provider of wireless communication equipment agreed to be bought by Honeywell International Inc. (HON US) for $491 million, or $33 a share.

Fairchild Semiconductor International Inc. (FCS US) slid

7.7 percent, the most since October 2009, to $15.41. The San Jose, California-based chipmaker was cut to “neutral” from “outperform” at Robert W. Baird & Co., which said it expects a decline in semiconductor orders this quarter.

Gerber Scientific Inc. (GRB US) rallied 35 percent to $10.99, the third-biggest gain in the Russell 2000 Index. The supplier of automated manufacturing equipment agreed to be sold to private equity firm Vector Capital Corp. for $11 a share.

Graham Packaging Co. (GRM US) rose 17 percent to $25.63, the highest price since the company’s initial public offering in February 2010. The maker of plastic containers controlled by Blackstone Group LP said it has received an unsolicited proposal from a third party to acquire the company for $25 a share in cash.

Harvest Natural Resources Inc. (HNR US) rose 15 percent, the most since March 2010, to $12.09. The Houston-based oil and natural-gas company announced it found oil off the coast of Gabon.

MDC Partners Inc. (MDCA US) rose 11 percent, the most since May 2009, to $18.13. The marketing communications firm was added to Russell Investments’ 3000 and Microcap indexes, “a significant positive” for the stock, William Blair & Co. said in a note.

M&F Worldwide Corp. (MFW US) jumped 42 percent, the most since at least June 1995, to $24.06. The producer of licorice extract and other flavoring agents said shareholder MacAndrews & Forbes Holdings Inc. offered to buy the shares it doesn’t already own for $24 a share.

Ness Technologies Inc. (NSTC US) jumped 14 percent, the most since April 2009, to $7.60. The computer-services provider said it agreed to be acquired by an affiliate of Citi Venture Capital International in a cash transaction valued at about $307 million.

Quanex Building Products Corp. (NX US) fell 5.6 percent, the most since Sept. 7, to $17.09. The producer of building materials reported second-quarter profit excluding some items of 3 cents a share, trailing the average analyst estimate by 72 percent, Bloomberg data show.

Republic Airways Holdings Inc. (RJET US) rose 12 percent, the most since February 2010, to $4.70. The Indianapolis-based airline agreed to seek new investors for Frontier Airlines, shrinking its stake to become a minority owner, in exchange for concessions from pilots at the unprofitable carrier. Bank of America Corp. increased the stock’s rating to “neutral” from “underperform.”

Timberland Co. (TBL US) surged 44 percent, the biggest gain in the Russell 2000 Index, to $43.20. The maker of outdoor clothing and footwear agreed to be acquired by VF Corp., the world’s largest apparel maker, for $43 a share. Shares of VF (VFC US) rose 11 percent to $101.62 for the biggest gain in the Standard & Poor’s 500 Index.

Transatlantic Holdings Inc. (TRH US) advanced 9.5 percent to $48.19 for the second-biggest gain in the Russell 1000 Index. The reinsurer, formerly owned by American International Group Inc., and Switzerland’s Allied World Assurance Company Holdings AG agreed to merge in a $3.2 billion deal that creates a reinsurer with operations in 18 countries.

Vera Bradley Inc. (VRA US) rose 8.1 percent, the most since March 16, to $40.35. The seller of women’s fashion accessories was raised to “outperform” from “neutral” at Robert W. Baird & Co.

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