The total bid Wednesday night was $315.9 million, The New York Times reported. That came a day after a contemporary sale at Sotheby's rival, Christie's, brought in $325 million.
Bacon's "Second Version of Study for Bullfight No. 1" (1969) went for $45.9 million, the highest price of the evening. A Bacon self-portrait sold for $33 million.
Sotheby's had guaranteed the two paintings for $60 million. The auction house was committed to paying the seller at least that much whether they reached it or not.
Koons' "Hanging Heart (Magenta/Gold)" sold for $23.5 million. Koons made five versions in different colors.