Complex sentence: Centene Corporation is a large publicly-traded company and a leading multi-line healthcare enterprise that serves as major intermediary for government healthcare programs, including Medicare, Medicaid, the Health Insurance Marketplace system, Tricare, as well as traditional commercial insurance.
Split into simpler sentences: Centene Corporation is a large publicly-traded company and a leading multi-line healthcare enterprise that serves as major intermediary for both government-sponsored and privately-insured healthcare programs. The main lines of Centene include Medicare, Medicaid, the Health Insurance Marketplace system, Tricare, as well as traditional commercial insurance.