Amazon.com Inc. is no longer hiring as many M.B.A.s from top-ranked U.S. business schools, as it seeks to recruit a new wave of management talent from a broader array of institutions.

In the recent past, the Seattle-based online retailer and tech giant has hired as many as 1,000 full-time and intern M.B.A.s each year, concentrating on a couple dozen elite programs, some school administrators say. It would blanket campuses like MIT’s Sloan School of Management and Texas A&M’s Mays Business School with employees and executives...