Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a $37,490,229 firm-fixed-price modification (P00012) to a previously awarded indefinite-delivery/indefinite-quantity contract (N0001919D0015). This modification increases the contract ceiling and adds scope to procure ancillary mission equipment in support of F-35 Joint Strike Fighter Lot 15 production aircraft for the Navy, Marine Corps, Air Force, Foreign Military Sales customers, and non-U.S. Department of Defense participants. Work will be performed in Fort Worth, Texas, and is expected to be completed in December 2023. No funds are being obligated at time of award; funds will be obligated on individual orders as they are issued. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.