Donald B. Halverstadt

HCA Health Services of Oklahoma, Inc. provides medical and surgical services for patients. It offers cancer, heart, laboratory, mediflight air ambulance, orthopedics and neurosciences, pastoral care, PET/CT scanner, as well as senior, women's and newborn services. The company was founded in 1991 and is headquartered in Oklahoma City, OK.

Triad Hospitals, Inc. owns and manages hospitals and ambulatory surgery centers in cities and selected urban markets. It provides internal medicine, general surgery, cardiology, oncology, neurosurgery, orthopedics, obstetrics, diagnostic and emergency services. The company was founded in1999 and is headquartered in Plano, TX.

Part of Oklahoma State University Board of Regents, the company oversees college activities. The company is based in Oklahoma City, OK.

BancFirst provides banking services. The company is headquartered in Oklahoma City, OK.

LHP Hospital Group, Inc. provides essential hospital capital and expertise to not-for-profit hospitals and hospital systems, with which it forms joint ventures to own, operate, and manage acute care. The company founded by Daniel J. Moen in 2008 and is headquartered in Austin, TX.