Ernest G. Ludy

Wellmark, Inc. provides health insurance products and related services. It pays health benefit claims. It also operates through it subsidiaries such as Wellmark Blue Cross and Blue Shield of Iowa. The company was founded in 1948 and is located in Des Moines, IA.

Poliwogg Holdings, Inc. provides investment banking services. It offers swaps, forward and futures contracts, options and exchange traded funds. The company was founded by Jeffrey L. Feldman and David Webster Jaffin and is headquartered in New York, NY.

NightHawk Radiology Holdings, Inc. provides radiology solutions to radiology groups and hospitals throughout the United States. The company's team of independent contractor and hospital-privileged physicians provides professional services 24 hours per day, seven days a week, for approximately 26 percent of all United States hospitals. In addition to these professional services, the company also provides its customers with cardiac 3D reconstructions, radiology clinical workflow technology and business services. It sells its services primarily through the direct sales force comprised of telesales and field sales personnel

Arboretum Ventures LLC (Arboretum Ventures) is a venture capital firm founded in 2002 by Jan L. Garfinkle and Tim B. Petersen. The firm is headquartered in Ann Arbor, Michigan.