TriNet Group, Inc. operates as a professional employer organization (PEO) delivering human capital management (HCM) services primarily to small and medium-sized businesses across the United States. The company's core business model involves co-employment, where it assumes responsibility for payroll processing, tax administration, and employee benefits, allowing clients to access large-group health insurance and retirement plans. TriNet's revenue is primarily derived from professional service fees and insurance-related revenues. The company serves clients across various sectors, including technology, life sciences, financial services, and non-profits, offering industry-specific HR solutions. In addition to its high-touch PEO services, TriNet provides Administrative Services Organization (ASO) solutions and a cloud-based HR software platform for self-directed workforce management.