Tracy Williams, Ltd.

Formerly director for Zwirner & Wirth gallery on the Upper East Side, Williams first opened her gallery in her own West Village townhouse in 2004. More recently, she's moved to Chelsea's busy 23rd Street corridor. Williams deals in the secondary market, but also represents a strong lineup of midcareer artists working in a variety of media, including Barbara Bloom, Georgina Starr and Olav Christopher Jenssen.