Tonka Bay Equity Partners acquired Aero Systems Engineering, Inc., a world wide leader in wind tunnel and jet engine testing facilities.

Atritech, a developer of medical devices to close the left atrial appendage in patients with atrial fibrillation, was sold to Boston Scientific.

Automotive Cooling Products Inc., which grew to a seven location distributor of automotive heating and cooling products, was sold to 1-800-Radiator.

The Burchfield Group, a leader in pharmacy benefit consulting, auditing and health plan compliance services, was acquired by AON, Inc.

Cirus Controls, a provider of controls and systems for the winter road maintenance industry, was acquired by Certified Power Inc.

Endocardial Solutions, a developer of a software mapping system used for navigation and localization in atrial fibrillation ablation, was sold to St. Jude Medical.

Fair Isaac sold its bill review and medical cost containment technology for the workers compensation industry to Mitchell Corporation.

Gentra, a manufacturer of nucleic acid purification reagents and instruments for clinical and clinical research laboratories, was sold to Qiagen.

Itasca Systems, a provider of specialized industrial process water treating solutions, was acquired by H2O Innovation.

Livio, a provider of specialized house call services for low-income and elderly patients covered by Medicaid and Medicare, was acquired by BCBS of Minnesota.

Medicode, a provider of claims adjudication software and databases for healthcare providers and insurance companies, was sold to UnitedHealth Group.

MedNet, an SaaS-based eClinical software technology company, was recapitalized by Arrowroot and Cohesive Capital Partners.

Network Instruments, a provider of award-winning, affordable network troubleshooting solutions for global customers, was acquired by JDSU.

PowerObjects, a professional services firm providing service, support, education and add-ons for Microsoft Dynamics CRM, was acquired by HCL Technologies.

Proximagen, a biotechnology company with a pipeline in various stages of development across a number of therapeutic areas, was acquired by Upsher-Smith.

Sanovia Corporation, a provider of automated decision-making technology for health plan pharmaceutical administration, was sold to Health Information Designs.

St. Anthony Publishing, a provider of health information for the coding, reimbursement, and managed care industries, was acquired by UnitedHealth Group.

Synovis, a developer of medical devices used primarily in surgical procedures for soft tissue repair, was sold to Baxter International.

Top Tool Company, a manufacturer of complex precision stamped components used primarily for medical devices, was sold to Cirtec Medical LLC.

Trussbilt LLC, a manufacturer of steel hardware for the corrections market, was acquired by New York-based private equity firm Sentinel Capital Partners.

Worldwide Clinical Trials began as an investigational site before expanding to become a global Contract Research Organization and being sold to UnitedHealth Group.

Zepol, a provider of US import and export competitive intelligence, market research, lead generation, sourcing, and trade compliance, was sold to Datamyne.

Zyga, a developer and producer of minimally invasive medical devices to treat conditions of the lumbar spine, was sold to RTI Surgical, Inc.