Solow is an extensive collector of modernist and renaissance art. Solow owns “Young Man Holding a Medallion” by Botticelli as well as paintings by Balthus, Henri Matisse, and Franz Kline; and sculptures by Alberto Giacometti. In February 2012, he sold a Francis Bacon painting for $33.5 million, a Joan Miro painting for $26.6 million, a Henry Moore sculpture for $30.1 million; and in February 2013, he sold an Amedeo Modigliani painting for $42.1 million. In May 2015 Solow sold Giacometti' s 1947 sculpture L'homme au doigt for $126.1 million, setting a world record for the most expensive sculpture ever sold.