Spok Holdings, Inc. engages in the provision of communication solutions. The company is headquartered in Plano, Texas and currently employs 425 full-time employees. The firm offers a focused suite of unified clinical communication and collaboration solutions that include call center applications, clinical alerting and notifications, one-way and advanced two-way wireless messaging services, mobile communications, and public safety solutions. Its one-way and advanced two-way wireless messaging services, including information services, throughout the United States. The company also offers voice mail, personalized greetings, message storage and retrieval, equipment, maintenance plans and/or equipment loss protection to both one-way and two-way messaging subscribers. The company also develops, sells and supports enterprise-wide systems for hospitals and other organizations needing to automate, centralize and standardize clinical communications. The company offers its services and products to three major market segments: healthcare, government, and large enterprise.