RTX CorporationPratt & Whitney signed a production licensing agreement with Hermeus for the F100-PW-229 engine, adding a qualified source and supporting supply resilience and throughput.

RTX unit Pratt & Whitney signed a new production licensing agreement with Hermeus covering the F100-PW-229 fighter engine, and separately completed the F135 Engine Core Upgrade Risk Reduction Design Review for the engine that powers the F-35. The Hermeus accord allows Hermeus to manufacture the F100-PW-229, an engine widely used across U.S. military fighter aircraft fleets, giving Pratt & Whitney another qualified source for one of its most widely fielded fighter engines and supporting supply resilience and throughput. RTX, a US-based aerospace and defense group with a market value of about $266.4b, supplies engines, systems, and services to military, commercial, and government customers. The F135 Engine Core Upgrade review and the F100 production license both speak to RTX's push into technology-heavy defense work while managing engine-related risks. The key marker to watch is whether the F135 Engine Core Upgrade shifts from design milestones into funded production and retrofit orders across the existing fleet, with clear timing and volumes.
RTX CorporationPratt & Whitney signed a production licensing agreement with Hermeus for the F100-PW-229 engine, adding a qualified source and supporting supply resilience and throughput.
Hermeus signed a licensing agreement allowing it to manufacture the F100-PW-229 fighter engine.