Allan Roger Will

Split Rock Partners LLC (Split Rock Partners) is a venture capital firm founded by Jim Simons, Michael Gorman, David Stassen. The firm is headquartered in Eden Prairie, Minnesota.

Cierra, Inc. is a medical device company. It develops devices for minimally invasive heart disease surgeries such as the closure of Patent Foramen Ovale. Cierra was founded in 2003. Its headquarters are located in Redwood City, CA.

Emphasys Medical, Inc., a medical technology company, focuses on developing and commercializing minimally invasive therapeutic devices for the treatment of patients with emphysema and other breathing disorders. It offers Zephyr Endobronchial Valve system, which is designed to block air from passing through the opening in the lung and into the chest cavity, resulting in the reduction or elimination of airflow through the leak to allow the tissue to heal. The company offers its products through distributors and dealers in Europe, Australia, Hong Kong, and Singapore. Emphasys Medical was founded in 2000 and is based in Redwood City, CA. Emphasys Medical, Inc. operates as a subsidiary of Pulmonx Corp.

AneuRx, Inc. maufactures and sells surgical grafts for treating abdominal aortic aneurysms delivered via minimally invasive technologies

Xtent, Inc. is a medical devices manufacturing company. The company develops drug-eluting stent systems for the treatment of multi-vessel, multi-lesion coronary and peripheral vascular diseases. Xtent was founded in 2002 and is headquartered in Menlo Park, CA.

Evalve, Inc. designs, develops, manufactures and markets devices. It developed a proprietary system which enables percutaneous repair of cardiac valves. The firm's products reduces the risks, trauma, and costs associated with current open, arrested heart surgical options. The company was founded on June 9, 1999 and is headquartered in Menlo Park, CA.

Concentric Medical, Inc. designs, manufactures and distributes medical devices. The company was founded in August 1999 and is headquartered in Kalamazoo, MI.