In Orlando, just two giants run the show. Orlando Health and AdventHealth together control 77% of the entire inpatient hospital market in the four-county Orlando metro area, according to Orlando Health’s bond filing. Those two not-for-profit systems also own two-thirds of the pediatric hospital market. Orlando Health and AdventHealth control closer to 90% of inpatient services in a narrower three-county slice of Orlando, according to older filings.