Top Percentage Gainers and Losers as of 12pm 06/16/11

Best

1) Southern Union Company (NYSE: SUG): Shares of Southern Union Company are currently trading up 17.3% from yesterday's close to $33.15. The company is being bought by Energy Transfer Equity (NYSE: ETE) for $7.9 billion. Shareholders of Southern Union will exchange each share for newly issued Series B shares valued at $33 per share.

2) Allos Therapeutics (NASDAQ: ALTH): Shares of Allos Therapeutics are currently trading up 15.7% from yesterday's close to $2.14. Today, the company presented initial data from COMPLETE, an international compilation of data designed to address the demand for a heightened understanding of treatment patterns and results for patients with peripheral T-cell lymphoma. The stock hit a 52-week low of $1.84 in yesterday's session.

3) Life Partners Holdings (NASDAQ: LPHI): Shares of Life Partners Holdings are currently trading up 15.4% from yesterday's close to $4.28. The stock recently hit a 52-week low of $3.20 on June 10th. A bullish double bottom formation appears to be taking shape on a one year daily chart.

4) MELA Sciences (NASDAQ: MELA): Shares of MELA Sciences are currently trading up 10.6% from yesterday's close to $2.60. The stock recently hit a 52-week low of $2.22 on June 13th. The year-to-date performance of MELA has been a loss of 22.3%.

5) China Valves Technology (NASDAQ: CVVT): Shares of China Valves Technology are currently trading up 9.5% from yesterday's close to $3.57. The company entered into an agreement with Sinopec International Petroleum Service Corporation. Under the agreement, China Valves will supply Sinopec with valve products for the company's international endeavors. The deal is valid from June 16th, 2011 to June 15th, 2013.

Other Notable Gainers

Odyssey Marine Exploration (NASDAQ: OMEX): Shares of Odyssey Marine Exploration are currently trading up 8% from yesterday's close to $3.38. The company announced that it will price its 4.8 million share offering at $3.05 per share.

China Security & Surveillance Technology (NYSE: CSR): Shares of China Security are currently trading up 6.2% from yesterday's close to $4.96.

Smithfield Foods (NYSE: SPD): Shares of Smithfield Foods are currently trading up 5.9% from yesterday's close to $21.60.

Worst

1) Winnebago Industries (NYSE: WGO): Shares of Winnebago Industries are currently trading down 20.7% from yesterday's close to $8.72. The company announced Q3 earnings of $0.04 per share versus estimates of $0.13 per share. Revenue came in at $135.6 million versus estimates of $151 million.

2) Finisar (NASDAQ: FNSR): Shares of Finsar are currently trading down 18.7% from yesterday's close to $14.41. The company warned that Q1 earnings will come in between $0.16 to $0.20 per share versus estimates of $0.6 per share. Revenue is projected to be $221 million to $236 million versus estimates of $250.6 million. Finisar was downgraded from Outperform to Neutral by Credit Suisse.

3) Insituform Technologies (NASDAQ: INSU): Shares of Insituform Technologies are currently trading down 14% from yesterday's close to $18.45. The company lowered its 2011 fiscal year EPS to $1.30 per share versus estimates of $1.70. Insituform cited an underperformance in the North American Sewer Rehabilitation business as the cause.

4) Pandora Media (NYSE: P): Shares of Pandora Media are currently trading down 7.8% from yesterday's close to $16.06. The stock fell below its IPO price of $16 in today's session, trading down to as low as $15.50. WorldStreetFundamentals.com released an industry report regarding Pandora earlier today.

5) Hollysys Automation Technologies (NASDAQ: HOLI): Shares of Hollysys Automation are currently trading down 7.2% from yesterday's close to $10.00. The stock has gained 31.6% since hitting a 52-week low of $7.59 on June 8th.

Other Notable Losers

ChinaCast Education (NASDAQ: CAST): Shares of ChinaCast Education are currently trading down 6.4% from yesterday's close to $4.39.

Zion Oil & Gas (NASDAQ: ZN): Shares of Zion Oil & Gas are currently trading down 6% from yesterday's close to $6.21.

Casella Waste Systems (NASDAQ: CWST): Shares of Casella Waste are currently trading down 5.5% from yesterday's close to $5.50.