Lloyd's Register Group Limited (LR) is a technical and professional services organisation and a maritime classification society, wholly owned by the Lloyd’s Register Foundation, a UK charity dedicated to research and education in science and engineering. The organisation dates to 1760. Its stated aims are to enhance the safety of life, property, and the environment, by helping its clients (including by validation, certification, and accreditation) to improve the safety and performance of complex projects, supply chains and critical infrastructure.

In July 2012, the organisation converted from an industrial and provident society to a company limited by shares, named Lloyd’s Register Group Limited, with the new Lloyd’s Register Foundation as the sole shareholder. At the same time the organisation gave to the Foundation a substantial bond and equity portfolio to assist it with its charitable purposes. It will benefit from continued funding from the group’s operating arm, Lloyd’s Register Group Limited.

In 2020, Lloyd's Register sold its Energy business and in 2021 sold its Business Assurance & Inspection Services division. In 2022, LR acquired OneOcean Group, a marine software and digital services company, to head up a new digital services division.

Lloyd's Register is unaffiliated with Lloyd's of London, but emerged from the same professional and social circles that historically met at Lloyd's Coffee House, from which both organisations took their name.