The Terma Group said the agreement covers the sole-source manufacture and assembly of horizontal tail leading edges for all F-35 variants.
The contract is until 2019, includes follow-on options and is worth $95 million.
"The agreement signing solidifies Terma's position on the F-35 program and shows how collaboration can benefit Terma, Lockheed Martin and the F-35 program as a whole," said Jens Maaloe, Terma's president and chief executive officer.
"The companies will explore technologies, set a path forward to achieve manufacturing efficiencies to meet rigorous quality requirements and work toward establishing Terma as a premier supplier of composite parts."
Terma, which has collaborated with Lockheed Martin Aeronautics since 1976 on the original F-16 program, has been part of the F-35 program since 2000. It recently entered an agreement with Northrop Grumman for the manufacture of component parts for the F-35 Lightning II program.
"By entering these agreements, we have established the necessary solid and reliable base for our future investment in technology, production facilities, and human resources," said Maaloe.
'Happy' fan videos make Pharrell cry [VIDEO]
Pregnant Mila Kunis wins 'Best Villain' at MTV Movie Awards