LEIDOS HOLDINGS, INC.
UNAUDITED BACKLOG BY REPORTABLE SEGMENT
(in millions)

Backlog represents the estimated amount of future revenues to be recognized under negotiated contracts as work is performed. Backlog estimates are subject to change and may be affected by factors including modifications of contracts and foreign currency movements.

Funded backlog for contracts with the U.S. Government represents the value on contracts for which funding is appropriated less revenues previously recognized on these contracts. Funded backlog for contracts with non-U.S. Government agencies and commercial customers represents the estimated value on contracts, which may cover multiple future years, under which Leidos is obligated to perform, less revenue previously recognized on the contracts.

Negotiated unfunded backlog represents estimated amounts of revenue to be earned in the future from (1) contracts for which funding has not been appropriated and (2) unexercised priced contract options. Negotiated unfunded backlog does not include future potential task orders expected to be awarded under indefinite delivery/indefinite quantity, General Services Administration Schedule or other master agreement contract vehicles.

The estimated value of backlog as of the dates presented was as follows: