It's the first time "Meules" has been auctioned off since 1986, when its previous owners bought it for $2.53 million. It sold for 44 times that amount at Sotheby's Impressionist & Modern Art Evening Sale.
The painting is one of only eight in the series still in private hands. The other 17 are owned by museums, including the Art Institute of Chicago and the Metropolitan Museum of Art in New York.
The Wall Street Journal reported that a woman at the back of the auction room scored the winning bid on the painting, but she has not been identified.