David S. Utterberg

Medisystems Corp. manufactures and distributes medical devices for dialysis and blood related treatments. Its products include Streamline and ReadySet blood tubing sets, MasterGuard and ButtonHole needle sets, safety accessories and access management tools. The company was founded on March 22, 1993 and is headquartered in Lawrence, MA.

Vasca, Inc. develops access and related technologies. It manufactures and markets life site hemodialysis access system technologies to improve the quality of patient care in the United States. The company was founded by Jeffrey H. Burbank in April 1996 and is headquartered in Tewksbury, MA.

NxStage Medical, Inc. is a medical technology company, which develops, manufactures, and markets products for the treatment of ESRD and acute kidney failure. It operates through the following business segments: System One, In-Center, and Services. The System One segment engages in the sale and rental of the System One and PureFlow SL equipment and the sale of disposable products in the home and critical care markets. The In-Center segment sells blood tubing sets and needles for hemodialysis primarily for the treatment of ESRD patients at dialysis centers and needles for apheresis. The Services segment includes revenues from dialysis services provided to patients at its recently opened NxStage Kidney Care dialysis centers. The company was founded by Jeffrey H. Burbank in December 1998 and is headquartered in Waltham, MA.