Early manufacturer involvement came in the form of a "factory team" or "works team" (that is, one owned and staffed by a major car company), such as those of Alfa Romeo, Ferrari, or Renault. After having virtually disappeared by the early 1980s, factory teams made a comeback in the 1990s and 2000s and formed up to half the grid with Ferrari, Jaguar, BMW, Renault, Toyota, and Honda either setting up their own teams or buying out existing ones. Mercedes-Benz owned 40% of the McLaren team and manufactured the team's engines. Factory teams make up the top competitive teams; in 2008 wholly owned factory teams took four of the top five positions in the Constructors' Championship, and McLaren the other. Ferrari holds the record for having won the most Constructors' Championships (sixteen). However, by the end of the 2000s factory teams were once again on the decline with only Ferrari, Mercedes-Benz, and Renault lodging entries to the championship.