Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a $220,744,973 modification (P00004) to a cost-plus-fixed-fee, firm-fixed-price order (N0001923F0002) against a previously issued basic ordering agreement (N0001919G0008). This modification exercises options to support calendar year 2024 modification and retrofit activities for the F-35 Joint Strike Fighter program to include program management, non-recurring engineering, aircraft induction, contractor field, depot site, and laser shock peening site support. Additionally, this modification adds scope for the procurement of material kits as well as special tooling and test equipment necessary to support F-35 Joint Strike Fighter aircraft retrofit and modification efforts for the Air Force, Marines, Navy, Foreign Military Sales (FMS) customers, and non-U.S. Department of Defense (DOD) participants. Work will be performed in Fort Worth, Texas, and is expected to be completed in January 2026. Fiscal 2022 aircraft procurement (Navy) funds in the amount of $446,744; fiscal 2023 aircraft procurement (Air Force) funds in the amount of $151,628; fiscal 2024 aircraft procurement (Air Force) funds in the amount of $39,627,00; fiscal 2024 aircraft procurement (Navy) funds in the amount of $53,968,394; non-U.S. DOD participant funds in the amount of $69,664,330; and FMS funds in the amount of $56,886,874, will be obligated at the time of award, $446,744 of which will expire at the end of the current fiscal year. Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.