The following index lists our responses to the GRI Standards: Core option (General Disclosures and material topic-specific disclosures) and provides links to relevant report content on Leidos.com where appropriate. Note: For each topic-specific disclosure, disclosures on Management Approach are contained in relevant sections on Leidos.com, including how Leidos manages each material topic, any associated impacts and boundaries, and related evaluations of management approach, where applicable.