The U.S. Navy on Friday awarded Pratt & Whitney a contract modification worth up to nearly $2.9 billion to build more engines for the F-35 Joint Strike Fighter.

Pratt & Whitney, which is a subsidiary of RTX, will produce and deliver 141 F135 engines to go into new F-35s for the Air Force, Marine Corps and Navy, as well as partner nations in the F-35 program and foreign military customers.

The Navy expects Pratt to finish these engines by February 2028. Work on the engines will be spread among multiple Pratt facilities in Connecticut, Indiana, Washington, Maine and other locations.

These engines will go into the 18th lot of F-35 fighters being built by Lockheed Martin, largely at its facility in Forth Worth, Texas. The Navy awarded Lockheed a contract in December 2024 worth up to $11

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