John Laing Group plc is a British investor, developer and operator of privately financed, public sector infrastructure projects such as roads, railways, hospitals and schools through public-private partnership (PPP) and private finance initiative (PFI) arrangements. It was listed on the London Stock Exchange and was a constituent of the FTSE 250 Index prior to its acquisition of the company by the American private equity firm Kohlberg Kravis Roberts (KKR).

A public–private partnership is a long-term arrangement between a government and private sector institutions. Typically, it involves private capital financing government projects and services up-front, and then drawing revenues from taxpayers and/or users for profit over the course of the PPP contract. Public–private partnerships have been implemented in multiple countries and are primarily used for infrastructure projects. Although they are not compulsory, PPPs have been employed for building, equipping, operating and maintaining schools, hospitals, transport systems, and water and sewerage systems.