Sotheby’s began New York’s May contemporary art auction cycle with a blue-chip evening led by Mark Rothko’s Brown and Blacks in Reds, which sold for $85.8 million with fees from the collection of Robert Mnuchin, anchoring a night reported at $389.3 million and offering one of the first major public readings of the spring art market.

The Rothko, painted in 1957 and estimated at $70 million to $100 million, was the clear centerpiece of the evening. Sotheby’s listed the work as part of “Robert Mnuchin: Collector at Heart,” an 11-lot sale devoted to material from the collection of the late financier, art dealer and collector. According to Sotheby’s lot information, Brown and Blacks in Reds is an oil on canvas measuring 90 1/2 by 60 5/8 inches, signed and dated on the reverse, and executed during the mature period that produced some of Rothko’s most sought-after color-field paintings.

The final price placed the work near the top of Rothko’s auction history. Artnet reported that the painting hammered at $74 million and reached $85.8 million with fees, making it the second-highest auction result for the artist. Rothko’s auction record remains Orange, Red, Yellow, which sold at Christie’s New York in 2012 for about $86.9 million. The new result did not break that benchmark, but it still marked a major return for a work that had previously sold at Christie’s in 2003 and later entered Mnuchin’s collection.

The provenance helped explain the painting’s role in the sale. Sotheby’s published lot history traces Brown and Blacks in Reds to Sidney Janis Gallery in New York, the Seagram Collection, a 2003 Christie’s New York auction, and then to the present owner. The exhibition history also gave bidders a museum-grade narrative, with appearances connected to the Whitney Museum of American Art, the Guggenheim Museum, the Museum of Fine Arts in Houston, the Walker Art Center, the Los Angeles County Museum of Art, Tate Gallery, Mnuchin Gallery and Fondation Louis Vuitton.

Mnuchin’s name added another layer of market significance. Sotheby’s described the collection as reflecting decades of collecting by Robert and Adriana Mnuchin, with works by artists the former banker and dealer knew and championed through his gallery program. The evening sale included postwar and modern material by Rothko, Willem de Kooning, Franz Kline, Pablo Picasso, Jeff Koons, Joan Miró, John Chamberlain and David Hammons. Sotheby’s had placed the collection’s combined estimate above $130 million.

Rothko was not the only high-value artist in the Mnuchin group. A second Rothko, No. 1 from 1949, sold for $20.8 million with fees, according to Artnet. Sotheby’s listings before the sale had placed that work at an estimate of $15 million to $20 million. The result reinforced how tightly the evening’s demand clustered around artists with established museum histories and relatively scarce market supply.

The broader contemporary session brought additional signals from the top of the market. Jean-Michel Basquiat’s Museum Security (Broadway Meltdown), a 1983 work with a long exhibition history, sold for $52.7 million with fees. Sotheby’s promoted the painting as a major work from the artist’s pivotal early-1980s period and noted its past visibility in prominent exhibitions, including shows connected to the Fondation Beyeler, Fondation Louis Vuitton, the Brant Foundation and Gagosian.

Willem de Kooning’s Untitled III, painted in 1975, sold for $26 million. Sotheby’s described the work as a late-career painting shaped by the artist’s move to East Hampton and by a looser, more atmospheric handling of figure, light and landscape. Andy Warhol’s Brigitte Bardot, a 1974 portrait based on a Richard Avedon photograph and commissioned by Gunter Sachs, sold for $24.83 million, according to Sotheby’s published highlights. The Warhol had been held in Sachs’s collection for more than five decades before coming to auction.

Other listed highlights showed a sale built around recognizable names rather than speculative momentum. Lucio Fontana, Roy Lichtenstein, Agnes Martin, Helen Frankenthaler and Joan Mitchell appeared among the evening’s notable results or promoted lots. That structure matters because the contemporary market has been uneven since the pandemic-era boom cooled, with collectors and advisers generally favoring proven artists, long-held works and conservative estimates over younger-market volatility.

The Rothko result also illustrated the role of guarantees and irrevocable bids in high-end auctions. Sotheby’s marked Brown and Blacks in Reds as guaranteed property with irrevocable bids, a structure that can reduce the auction house’s downside risk while giving consignors greater certainty that a work will sell. Those arrangements have become common at the top of the market, especially for trophy works carrying estimates in the tens of millions of dollars. They can also shape the drama of a sale, because a work may be effectively pre-supported before live bidding begins.

For the U.S. art market, the evening carried significance beyond a single price. New York’s May auctions are a central barometer for global art-market liquidity, influencing consignor confidence, lending values, dealer pricing, and the private-sale conversations that follow public auctions. Sotheby’s result suggested that collectors are still willing to compete for major works when the artist, date, size and provenance are strong enough, but the tempo appeared disciplined rather than overheated.

The result comes as the auction houses compete for estates and single-owner collections that can concentrate attention in a more cautious market. Mnuchin’s collection provided that narrative, combining financial-world prominence, dealer credibility and major postwar names. Such consignments can attract buyers who might otherwise remain selective, because they offer not only individual works but also a story of taste, ownership and market validation.

The $85.8 million Rothko will likely become one of the defining data points of the week. It did not set a new artist record, and its price landed inside rather than above the estimate range, but it confirmed deep demand for rare, large-scale Rothkos with strong provenance. For Sotheby’s, the sale gave the house a headline work at the start of marquee week. For the wider market, it showed that the most expensive segment remains active, but increasingly dependent on quality, scarcity and carefully managed expectations.