Guidance Software ( GUID) jumped 31% after pricing its initial public offering of 5 million shares at $11.50 each. The stock opened at $13 and was lately rising $3.55 to $15.05.

Wegener ( WGNR), a provider of television, audio and data distribution networks, was stronger after it signed a deal making Mega Hertz the exclusive distributor for its products sold to U.S. cable operators. Shares of Wegener were up 22% to $1.23.

Onstream Media ( ONSM) was climbing on word it signed agreements to integrate some of its Digital Media Service Platform offerings with the Five Across Connect social-networking platform. Onstream was advancing 17.6% to $1.94.

Biomira ( BIOM) slumped on news the company will sell up to 9.6 million stock and warrant units to raise $13 million. Each unit will consist of one common share and 0.20 of a warrant, at an issue price of $1.35. Shares of Biomira were losing 21.3% to $1.22.

EntreMed ( ENMD) dropped after saying it will offer as many as 10.7 million shares at $1.60 each to certain institutional investors. The company said gross proceeds would be around $17.2 million. The stock was shedding 11.4% to $1.64.

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