The 1890 painting is one of only four works from Monet's acclaimed "Haystacks" series to come to auction this century, and one of only eight examples remaining in private hands. The 17 others reside at museums, including the Metropolitan Museum of Art and the Art Institute of Chicago.
The previous owners had purchased the painting in 1986 for $2.53 million. Sotheby's did not provide any details on the new buyer.
This story has been corrected to show that the sale was the first Impressionist work to cross the $100 million threshold, not $100,000.