
RTX has agreed to sell its Simmonds Precision Products business to US aerospace firm TransDigm Group for $765m in cash, including certain tax benefits.
Simmonds, a part of RTX business unit Collins Aerospace, designs and manufactures fuel and proximity sensing, as well as structural health monitoring systems for aerospace and defence solutions industries.
Headquartered in Vergennes, Vermont, Simmonds develops proprietary components which have significant aftermarket demand, with approximately 40% of its revenue coming from aftermarket sales.
With approximately 900 employees, Simmonds is projected to generate around $350m in revenue by the end of the calendar year 2025.
In September 2024, Simmonds secured a firm-fixed-price contract valued at $45.95m from the Army Contracting Command, Redstone Arsenal. This contract is for the maintenance and overhaul of the Data Analysis Control units used in the UH-60 Black Hawk helicopters.
TransDigm president and CEO Kevin Stein said: “We are excited about the acquisition of Simmonds. The company’s highly engineered, proprietary products with substantial aftermarket content fit well with our long-standing strategy. Simmonds has established positions across a diverse range of commercial and defence platforms.

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By GlobalData“The company is an industry leader in fuel and proximity sensing and structural health monitoring technology, and we are excited to partner with Simmonds to continue investing in the business. We also look forward to working with and continuing to support Simmonds’ commercial and defence customers. As with all TransDigm acquisitions, we expect this acquisition to create equity value in-line with our long-term private equity-like return objectives.”
The deal is subject to regulatory approvals within the US along with other customary closing conditions.
TransDigm plans to finance this acquisition using its existing cash reserves.
Headquartered in Cleveland, Ohio, TransDigm, through its subsidiaries to design, produce, and supply aircraft components for military and commercial aircraft.
This divestment comes as the proposed $1.8bn acquisition by Safran of a part of Collins Aerospace’s actuation and flight control business faces some blocks.
In June 2025, the Antitrust Division of the US Justice Department mandated that Safran and its subsidiary Safran USA sell off their North American actuation business and associated assets to resolve antitrust concerns arising from the proposed transaction.