Lockheed Martin Space, Titusville, Florida, is awarded a $1,200,310,015 fixed-price-incentive-fee, cost-plus-incentive-fee, cost-plus-fixed-fee modification (PZ0001) to previously awarded and announced unpriced letter contract N0003023C0100 for Trident II (D5) missile production and deployed systems support. This contract award also benefits a foreign military sale to the United Kingdom. Work will be performed in Titusville, Florida (22.5%); Magna, Utah (18.8%); Denver, Colorado (14.7%); Kings Bay, Georgia (11.3%); Bangor, Washington (9.1%); Sunnyvale, California (4.8%); Camden, Arkansas (3.8%); Valley Forge, Pennsylvania (3.3%); and other locations (less than 1.0%) each, 11.7% total). Work is expected to be completed Sept. 30, 2028. This action will be awarded subject to the availability of funds. No funds will be obligated under this action and no funds will expire at the end of the current fiscal year. The maximum dollar value of the contract action, including all options, if exercised, is $1,200,310,015. This contract is being awarded as a sole source under 10 U.S. Code 2304(c)(1) and was previously synopsized on the Systems for Award Management website. Strategic Systems Programs, Washington, D.C., is the contracting activity.