Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a cost-plus-incentive-fee, cost-plus-fixed-fee not-to-exceed $1,439,135,764 undefinitized contract. This contract provides for the continued development of critical F-35 warfighting capabilities, to include Electronic Warfare Band 2/5 Radar Warning Receiver, Modernized Countermeasure Controller, Multi-ship Infrared Search and Track Increment 2, and Beyond Line of Sight communications, as well as supports required training and combat data systems development for Lots 16 and 17 production aircraft for the Air Force, Navy, Marine Corps, Foreign Military Sales (FMS) customers, and non-Department of Defense (DOD) participants. Work will be performed in Fort Worth, Texas (60%); Nashua, New Hampshire (16%); Baltimore, Maryland (9%); Orlando, Florida (5.5%); Torrance, California (2%); San Diego, California (2%); El Segundo, California (2%); Northridge, California (1%); Clearwater, Florida (1%); Buffalo, New York (1%); and Tucson, Arizona (0.5%), and is expected to be completed in March 2028. Fiscal 2023 research, development, test, and evaluation (Navy) funds in the amount of $57,335,825; fiscal 2023 research, development, test, and evaluation Air Force) funds in the amount of $54,900,755; FMS customer funds in the amount of $565,817; and non-DOD participants funds in the amount of $30,558,644 will be obligated at the time of award, none of which will expire at the end of the current fiscal year. This contract was not competitively procured pursuant to 10 U.S. Code 2304(c)(1). The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity (N0001923C0009).