Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a $632,129,418 cost-plus-incentive-fee contract. This contract provides engineering, maintenance, logistics and material support to continue to develop, sustain and produce software builds, as well as carryout developmental flight tests in support of the F-35 Lightning II aircraft for the Air Force, Marine Corps, Navy, Foreign Military Sales customer, and non-U.S. Department of Defense (DOD) participants’ funds. This contract also provides unique sea trials on aircraft carriers for the government of the United Kingdom. Work will be performed in Fort Worth, Texas (81%); Orlando, Florida (7%); Linthicum, Maryland (3%); Nashua, New Hampshire (3%); San Diego, California (2%); El Segundo, California (2%); Samlesbury, United Kingdom (1%); Toronto, Canada (0.10%); and various locations within the continental U.S. (0.90%), and is expected to be completed in March 2024. Fiscal 2022 research, development, test and evaluation (Air Force) funds in the amount of $41,009,193; fiscal 2022 operation and maintenance (Air Force) funds in the amount of $40,103,104; fiscal 2022 operation and maintenance (Navy) funds in the amount of $40,103,104; fiscal 2022 research, development, test and evaluation (Navy) funds in the amount of $39,491,303; fiscal 2021 research, development, test and evaluation (Air Force) funds in the amount of $1,934,724; and non-U.S. DOD participants funds in the amount of $41,085,051 will be obligated at the time of award, $80,206,208 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 (N0001922C0041).