For decades, the David and Lucile Packard Foundation has worked with other funders to solve complex social problems. Recently, The Bridgespan Group helped the Foundation take stock of what it can learn from its many collaborations. This report shares our findings, including five collaborative models Packard uses and factors that raise the chances of a collaboration’s success. Other funders will find the Packard experiences instructive as they consider their own collaborations. Reading time 3 min.