Omni Energy Services ( OMNI) surged following the company's improved guidance. Omni now expects this year's earnings from continuing operations to be 74 cents to 78 cents a share. Revenue should be more than $90 million. Shares of Omni jumped 16.1% to $8.30.

KongZhong ( KONG) said Chief Financial Officer J.P. Gan plans to resign. Gan expects to pursue a career in venture capital and investment. He will remain in his current position until Dec. 31. Shares of KongZhong were up 25 cents, or 3.5%, at $7.44.

Generex Biotechnology ( GNBT) was climbing on word that Cardinal Health ( CAH) will distribute its new Glucose RapidSpray product in the U.S. The RapidSpray is designed for people who require or want additional glucose in their diet. Generex was adding 11.3% to $1.58.

Southwest Georgia Financial ( SGB) was higher by nearly 15% after the company said it would start a tender offer to repurchase up to 575,000 of its shares at a price of $23 each. The number of shares to be repurchased represents roughly 18% of its stock outstanding, and the purchase price is a 19% premium to the closing price of $19.40 on Sept. 14. Southwest Georgia was gaining $2.88 to $22.28.

Continucare ( CNU) fell following its latest fourth-quarter report. Revenue rose 24% to $36.2 million, but earnings from operations fell to $1.3 million from $4 million a year ago and net income slid to $1.1 million, or 2 cents a share, from $11.2 million, or 21 cents a share, last year. Shares were losing 16 cents, or 5.6%, to $2.68.

Eastern American Natural Gas Trust ( NGT) was weaker after Ensource Energy Income Fund terminated its offer for the company. The offer expired on Friday, and the minimum tender condition wasn't satisfied. Eastern's shares were down $2.62, or 9.2%, to $25.88.