The Simons Institute for the Theory of Computing at the University of California, Berkeley regularly devotes a semester to a given research topic, inviting interested researchers to make progress on the selected topic by either visiting regularly or taking up residence. This grant supports a semester at the Simons Institute devoted to advancing the theory and practice of data privacy. Funds will support visitors, events, and projects covering three themes: foundations of data privacy; interactions with other areas, such as statistics and geometry; and socio-technical aspects of data privacy—including modern privacy regulation, practical deployment challenges, and fairness, accountability, and transparency (FAT) issues. Program participants will include 23 senior visitors, 8 postdoctoral fellows, and over 20 graduate students. Expected outputs from this grant include a series of academic papers published by collaborating attendees and a white paper that describes findings and their implications for policy and practice.