One of the best known women entrepreneurs in India is once again plowing millions of dollars into the stock of U.S. agricultural equipment maker AGCO Corp. Mallika Srinivasan , who Forbes described in 2012 as " the tractor queen " of India, has in recent weeks bought nearly 400,000 shares of AGCO at a total cost of $18.6 million . Based in Duluth, Ga., AGCO is one of the United States' largest agricultural equipment companies, with 2014 sales of $9.7 billion.