Amphenol

Amphenol is an electronics company that makes connectors, sensors and antennas. Its headquarters is in Wallingford, Connecticut, in the United States. The site says the company was founded in 1932 and trades on the New York Stock Exchange under the ticker APH.

The company says its products serve many markets. These include automotive, broadband, commercial aerospace, defense, industrial, IT and data communications, mobile devices and mobile networks. Aerospace is one of these markets, not the whole business.

The product lines include fiber optic, harsh environment, high speed and power interconnect products. The company also makes sensors, such as gas, moisture, level, pressure, temperature and vibration sensors. The site lists cable assemblies, coaxial and power cable, printed circuit boards and antenna solutions.

The site says the company had sales of $23.1B in 2025. It reports about 170,000 employees at the end of 2025.

The company was founded in Chicago as the American Phenolic Corporation. The site says its heavy duty circular connectors were widely used in aircraft during World War II. The company listed on the New York Stock Exchange in 1957. It went public again on the same exchange in 1991.

The contact page uses a form with categories for legal, recruiting, investor or media relations, product information and privacy requests. The site has a product locator and a list of locations. Its social pages are on LinkedIn, YouTube and Facebook.