OSF healthcare system and Rockford Health System in Illinois. In November 2011, the FTC filed a lawsuit alleging that the proposed acquisition of Rockford by OSF would drive up prices for general acute-care inpatient services as OSF would face only one competitor (SwedishAmerican health system) in the Rockford area and would have a market share of 64%.[27] Later in 2012, OSF announced that it had abandoned its plans to acquire Rockford Health System.[27]