ESCO TECHNOLOGIES INC

Our principal products are described below. See Note 9 to the Consolidated Financial Statements for financial information regarding business segments and 10% customers.

A&D

The A&D segment accounted for approximately 44%, 41% and 41% of our total revenue in 2024, 2023 and 2022, respectively. This segment has nine facilities in the United States and one in Mexico.

The segment’s operations consist of PTI, VACCO, Crissair, Mayday and Globe. The companies within this segment primarily design and manufacture specialty filtration, fluid control and naval products, including hydraulic filter elements, fluid control devices and precision-tolerance machined components used in aerospace and defense applications, unique filter mechanisms used in micro-

propulsion devices for satellites, custom designed filters for manned aircraft and submarines, products and systems to reduce vibration and/or acoustic signatures and otherwise reduce or obscure a vessel’s signature, and other communications, sealing, surface control and hydrodynamic related applications to enhance U.S. Navy maritime survivability; and miniature electro-explosive devices for military aircraft ejection seats and missile arming devices.

USG

Our USG segment accounted for approximately 36%, 36% and 32% of our total revenue in 2024, 2023 and 2022, respectively. This segment has eight facilities in the United States, one in Canada, and ten outside North America.

The segment’s operations consist primarily of Doble Engineering Company, Morgan Schaffer and Altanova (collectively, Doble), and NRG. Doble is an industry leader in the development, manufacture and delivery of diagnostic testing and data management solutions that enable electric power grid operators to assess the integrity of high-voltage, high-current and high-power delivery equipment. It combines three core elements for customers – diagnostic test instruments and condition monitoring systems, expert consulting, and testing services – and provides access to its large reserve of related empirical knowledge. Altanova provides a significant international platform for Doble by representing our products and solutions in markets outside North and South America and Canada. NRG is a global market leader in the design and manufacture of decision support tools for the renewable energy industry, primarily wind and solar.

Test

Our Test segment accounted for approximately 20%, 23% and 27% of our total revenue in 2024, 2023 and 2022, respectively. This segment has four facilities in the United States and seven outside the United States.

The segment’s operations consist primarily of ETS-Lindgren, an industry leader in designing and manufacturing products and systems to measure and control RF and acoustic energy for research and development, regulatory compliance, and medical and security applications. It serves the acoustics, medical, health and safety, electronics, wireless communications, automotive and defense markets, providing a broad range of turnkey systems, including RF test facilities and measurement systems, acoustic test enclosures, RF and magnetically shielded rooms, and secure communication facilities.

ETS-Lindgren also supplies a broad range of components including RF absorptive materials, filters, antennas, field probes, test cells, proprietary measurement software and other test accessories required to perform a variety of tests and measurements. It offers a variety of services including calibration and product tests accredited by the following organizations: American Association for Laboratory Accreditation, National Voluntary Laboratory Accreditation Program and CTIA-The Wireless Association Accredited Test Lab. MPE’s comprehensive standard suite of core products spans high performance feedthrough capacitors, high current power, telephone, data & control line filters, through to the latest range of High Altitude Electromagnetic Protection filters.