Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a $26,885,590 fixed-price incentive (firm-target), firm-fixed-price, cost-plus-fixed-fee modification (P00033) to a previously awarded advanced acquisition contract (N0001920C0009). This modification adds scope to provide diminishing manufacturing sources and engineering change proposals implementation and integration in support of updating configurations for F-35 production aircraft Lots 15 and 16 for the Air Force, Marine Corps, Navy, non-Department of Defense (DOD) participants, and Foreign Military Sales (FMS) customers. Work will be performed in Fort Worth, Texas (59%); El Segundo, California (14%); Warton, United Kingdom (9%); Cameri, Italy (4%); Orlando, Florida (4%); Nashua, New Hampshire (3%); Baltimore, Maryland (3%); San Diego, California (2%); and various location outside the continental U.S. (2%), and is expected to be completed in July 2026. Fiscal 2022 aircraft procurement (Air Force) funds in the amount $15,682,908; fiscal 2022 aircraft procurement (Navy) funds in the amount of $2,297,486; fiscal 2021 aircraft procurement (Air Force) funds in the amount of $2,886,406; fiscal 2021 aircraft procurement (Navy) funds in the amount of $1,601,129; FMS customer funds in the amount of $4,273,036; and non-DOD participant funds in the amount of $144,625, will be obligated at the time of award, $4,487,535 of which will expire at the end of the current fiscal year. Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.