The U.S. Department of Defense and Lockheed Martin are close to deal for a contract worth almost $9 billion as negotiations are poised to bring the price per F-35 below $100 million for the first time, people familiar with the talks said Wednesday.

The F-35, the Pentagon's costliest arms program, has drawn fire from U.S. President-elect Donald Trump who has made lowering prices for military equipment a pillar of his transition into office.