The U.S. government awarded a $3.8 billion contract modification that definitizes production for lot 18 and supports production planning for lot 19. The F135 engine powers all three variants of the F-35 Lightning II.
The contract includes full-rate production engines as well as initial spare parts and key modules. It also provides engineering support, program oversight and dedicated production services.
Officials said the agreement ensures continued manufacturing capacity and stability across the supply chain. It supports both U.S. military services and international F-35 operators.
“The F135 is the most advanced military engine in the world, delivering unmatched thrust, reliability and mission readiness for the United States and its allies,” said Jill Albertelli.
“Pratt & Whitney is investing heavily across our global production base and supply chain to increase production and accelerate engine delivery and sustainment to meet growing global demand for the F-35 program,” she added.
The company has committed more than $1 billion over the past five years to expand and modernize its production capabilities. These investments have contributed to a 20 percent increase in F135 production rates compared with previous contracts.
Pratt & Whitney has delivered more than 1,400 F135 engines to date. The program supports 20 allied nations and represents a significant element of international defense cooperation.
Officials said the F135 program also plays a major role in the U.S. economy. It supports more than 66,000 jobs across 47 states and territories.
In 2025, the program generated more than $9 billion in domestic economic impact. The continued expansion of production is expected to sustain employment and industrial activity.
The contract reflects ongoing demand for the F-35 platform and its propulsion systems. RTX said the award reinforces its role in supporting global defense readiness and long-term program stability.
