Arlington Capital Partners Acquires L3Harris' Electron Devices and Narda Microwave-West to Form Stellant Systems

TransDigm Acquires Stellant Systems from Arlington Capital for $960 Million

January 14, 2026

Aerospace & Defense

TransDigm Group Incorporated has acquired Stellant Systems Inc., a portfolio company of Arlington Capital Partners, for approximately $960 million in cash. Stellant, headquartered in Torrance, California, manufactures high‑power electronic components for defense, space, medical and industrial markets and employs roughly 950 people, with expected 2025 revenue of about $300 million.

Stellant Systems Acquires Comtech's Power Systems Technology (PST) Product Line

October 12, 2023

Aerospace & Defense

Stellant Systems, a portfolio company of Arlington Capital Partners, agreed to acquire Comtech Telecommunications' Power Systems Technology (PST) product line for a total cash purchase price of $40 million (including up to $5 million contingent consideration). The deal strengthens Stellant's RF amplification portfolio — adding Gallium Nitride solid-state power capabilities and complementary customers and workforce — while Comtech will use the proceeds to reduce debt and de-lever its balance sheet.

Artemis Capital Partners Acquires Diamond Antenna and Microwave Corporation

November 14, 2024

Aerospace & Defense

Boston-based private equity firm Artemis Capital Partners has acquired Diamond Antenna and Microwave Corporation, a Littleton, Massachusetts developer and manufacturer of high-reliability RF rotary joints and rotating subsystems for aerospace, defense and space applications. Artemis says Diamond will continue to operate independently from its Littleton facilities and that the firm plans to invest in technical capabilities to deepen Diamond's offerings to prime integrators and government customers.

J.F. Lehman & Company Acquires Narda-MITEQ

December 7, 2021

Aerospace & Defense

J.F. Lehman & Company completed the acquisition of the assets of the Narda-MITEQ division and the stock of Narda Safety Test Solutions, GmbH (collectively "Narda-MITEQ") from L3Harris Technologies. Narda-MITEQ is a designer and manufacturer of RF and microwave subsystems and components serving defense, space and commercial test markets; the company employs roughly 400 people across facilities in Hauppauge, NY, Pfullingen, Germany and Cisano, Italy. Debt financing was provided by Barings Finance and Siemens Financial Services.

Amphenol Acquires Narda-MITEQ from J.F. Lehman & Company

July 23, 2025

Aerospace & Defense

Amphenol Corporation has acquired Narda-MITEQ (Narda AcquisitionCo., Inc.) from investment affiliates of J.F. Lehman & Company. The deal expands Amphenol’s RF and microwave components and subsystems capabilities for defense and commercial end markets; terms were not disclosed.

J.F. Lehman & Company Acquires Mission Microwave Technologies

March 14, 2024

Aerospace & Defense

An investment affiliate of J.F. Lehman & Company has acquired Mission Microwave Technologies, a Cypress, California-based maker of solid-state power amplifiers (SSPAs) and block upconverters (BUCs) for satellite communications. Debt financing for the transaction was led by Barings and co-led by PennantPark and SMBC; prior majority shareholders (affiliates of GaAs Labs LLC), founders and management will remain material shareholders.