Kimberly Pirtle, a fast-rising auctioneer at Sotheby’s, has left the company to launch Gabriel Advisory Group, a hybrid art advisory and cultural philanthropy firm. The new practice works across primary and secondary markets, advising collectors on acquisitions while also guiding philanthropic strategy and institutional engagement, drawing on Pirtle’s experience in Sotheby’s collectors group and her work with benefit auctions for organizations including the Pratt Institute, the Bronx Museum of the Arts, the Queens Museum, and the Gordon Parks Foundation. Pirtle is also maintaining a role as a VIP consultant with Frieze.
The move matters because it signals a shift in how high-net-worth collectors are approaching their art holdings—not merely as transactions but as part of a broader ecosystem of artist support, museum engagement, and charitable giving. By formalizing a model that integrates collecting and philanthropy, Pirtle is addressing a gap she identified in the traditional auction-house structure, where the focus is solely on sales. Her advisory reflects a growing trend in the art market where advisers expand into estate planning, collection management, and institutional strategy, offering a more holistic service that mirrors how collectors actually operate.