Spok Holdings Inc is a provider of healthcare communications. The company delivers clinical communication and collaboration solutions to help protect the health, well-being, and safety of people in the United States and abroad, on a limited basis, in Europe, Canada, Australia, Asia, and the Middle East. The company develops, sells, and supports enterprise-wide systems principally for healthcare and other organizations needing to automate, centralize, and standardize their approach to clinical and critical communications. The company offers its services and products to three market segments: healthcare, government, and large enterprise, with a greater emphasis on the healthcare market segment. Geographically, the company generates the majority of its revenue from the United States.