ON Semiconductor Corporation

ON Semiconductor Corporation

ON Semiconductor Corporation, which operates under the brand name "onsemi," is a publicly traded company headquartered in Scottsdale, Arizona. Founded in 1999 as a spinoff of Motorola's Semiconductor Components Group, the company trades on the Nasdaq stock exchange under the ticker symbol ON. As a major semiconductor manufacturer, onsemi reported annual revenue of approximately $6 billion for 2025 and employs around 23,000 people globally.

onsemi is an operating company that designs and manufactures a broad portfolio of intelligent power and sensing technologies. Its key product lines include power and signal management, logic, discrete, and custom devices. The company is a significant supplier to the automotive and industrial sectors, providing products like MOSFETs, IGBTs, power modules, and image sensors for applications such as vehicle electrification, advanced driver-assistance systems (ADAS), alternative energy, and factory automation.

The company’s patent litigation posture, based on available data, is that of an operating company defending its products and technology. It has been tracked as a defendant in one patent case and has not appeared as a plaintiff. This defensive role is typical for a large manufacturing entity facing assertions from non-practicing entities (NPEs).

The single tracked case is Greenthread, LLC v. ON Semiconductor Corporation et al., filed in the U.S. District Court for the District of Delaware in 2023. Greenthread, LLC is characterized as a patent assertion entity focused on semiconductor IP. The lawsuit alleged infringement of patents related to semiconductor device structures. The district court case was stayed pending an inter partes review (IPR) proceeding before the Patent Trial and Appeal Board (PTAB), a common defensive strategy employed by operating companies to challenge the validity of asserted patents.