Gainers on Thursday to Watch on Friday

As traders start packing away lunch and thinking about their after-trading martinis, benzinga takes a look at five top gainers so far today.

Vital Images is a leading provider of advanced visualization and analysis software for physicians and healthcare specialists. The company's software provides users productivity and communication tools to improve patient care that can be accessed throughout the enterprise anytime, anywhere via the internet. VTAL is currently trading at $18.64, a gain of $4.46 (31.45%) on the day.

LoopNet operates the most heavily trafficked commercial real estate marketplace online with more than 4 million registered members and more than 6 million unique visitors quarterly, as reported by Google Analytics. LoopNet recently entered into agreement to merge with CoStar

. LOOP is currently trading at $18.40, a gain of $4.03 (28.04%) on the day.

Kent Financial Services provides administrative and financial consulting services to other companies . Additionally, Kent International has developed a niche social networking website, www.chinauspals.com, designed to promote cultural exchange between the citizens of the United States and those of the People's Republic of China. KENT is currently trading at $1.78, a gain of $0.35 (24.48%) on the day.

Carbo is the world's largest supplier of ceramic proppant for fracturing oil and gas wells; provider of the industry's most popular fracture simulation software; and a provider of fracture design and consulting services. The Company also provides a broad range of technologies for spill prevention, containment and countermeasures, along with geotechnical monitoring. Carbo is currently trading at $168.35, a gain of $27.12 (19.20%) on the day.

SurModics partners with the world's foremost medical device, pharmaceutical and life science companies to develop and commercialize innovative products that result in improved diagnosis and treatment for patients. Core offerings include: drug delivery technologies (coatings, microparticles, nanoparticles, and implants); surface modification coating technologies that impart lubricity, prohealing, and biocompatibility capabilities; and components for in vitro diagnostic test kits and specialized surfaces for cell culture and microarrays. SurModics is currently trading at $14.44,a gain of $2.23 (18.26%) on the day.