Shares of Brentwood-based health care company IMAC Holdings start trading on the Nasdaq stock exchange. IMAC Holdings markets non-surgical treatments for orthopedic problems that would normally require surgery or opioids.

The business generates almost a third of its revenue from regenerative medicine, about one third from traditional, minimally invasive medical procedures and another third from physical therapy. As the government tightens regulations on opioid prescriptions and insurers look for ways to reduce treatment costs, more patients turn to IMAC clinics for treatment.