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Spok Holdings Inc is a provider of healthcare communications. It reports three market segments namely Healthcare, Government, and Large enterprise. The company provides paging services and software solutions in the United States and abroad. It provides services such as Value-Added Services, Advisory Services, Assessment Services and Adoption Services.
Natural Gas Services Group Inc provides natural gas compression equipment and services to the energy industry. The company manufactures, fabricates, rents, sells, and maintains natural gas compressors and flare systems for oil and natural gas production and plant facilities. Its operating units include Rental, Sales, and Aftermarket services. The company generates the majority of its revenue by renting out low- to medium-horsepower compression equipment to natural gas production companies in unconventional oil and gas regions of the United States.