What is the largest wine company in the world?

Hello there! I'm Dr. Vinifera, but you can call me Vinny. Ask me your toughest wine questions, from the fine points of etiquette to the science of winemaking. And don't worry, I'm no wine snob—you can also ask me those "dumb questions" you're too embarrased to ask your wine geek friends! I hope you find my answers educational, empowering and even amusing. And don't forget to check out my most asked questions and my full archives for all my Q&A classics.
Dear Dr. Vinny,
What is the largest wine company in the world?
—Aurora, Cape May, N.J.
Dear Aurora,
Constellation. According to my good friends at Impact (a sister publication to Wine Spectator that covers the nuts and bolts of the beverage industry), the five largest wine companies in the world by volume are (in descending order) Constellation Brands, E. & J. Gallo, The Wine Group, Fosters and Pernod Ricard.
—Dr. Vinny