The 4-3 decision narrows a longstanding exemption that had shielded regulated businesses from claims under the state's consumer protection law.

UnitedHealth's Optum Rx has reached a tentative settlement with the FTC, joining CVS Health's Caremark and the Cigna Group's Express Scripts, which agreed to settlements earlier this year.

The proposed settlement would "resolve all of the claims against the Caremark respondents" and already has been approved by CVS, FTC attorneys and the FTC's competition and consumer protection bureaus."