Does "America's Most Innovative Company" mean "the only company that is crowned (under none)"?

If there were other companies also listed as "America's most innovative...", that would be "America's Most Innovative Companies", not "America's Most Innovative Company" (the latter is singular).
Am I on the right track?
That is: In those years, in Fortune's view, Enron surpassed Microsoft; Enron is the king among American companies, none of whom was more "innovative" than Enron?

Context:

Enron Corporation (former http://en.wikipedia.org/wiki/New_York_Stock_Exchange ticker symbol ENE) was an American energy, commodities, and services company based in http://en.wikipedia.org/wiki/Houston, http://en.wikipedia.org/wiki/Texas. Before its bankruptcy on December 2, 2001, Enron employed approximately 20,000 staff and was one of the world's major http://en.wikipedia.org/wiki/Electricity, http://en.wikipedia.org/wiki/Natural_gas, communications, and http://en.wikipedia.org/wiki/Pulp_and_paper_industry companies, with claimed revenues of nearly $101 billion during 2000.^[1] http://en.wikipedia.org/wiki/Fortune_(magazine) named Enron "America's Most Innovative Company" for six consecutive years.