Who Owns Infineon?

The Infineon name was created on April 1, 1999, when Siemens carved out its semiconductor operations as a separate company. The inherited business carried decades of Siemens chip development, including memory, microcontrollers, and power devices. An IPO on the Frankfurt and New York exchanges followed in March 2000.

The brand's early identity was tied to memory through Qimonda, the DRAM business Infineon separated in 2006 and which failed in 2009. That exit refocused the brand on the segments where it had real leadership: power semiconductors, automotive chips, and security controllers.

Acquisitions built the modern portfolio. International Rectifier came in 2015 for about $3 billion, Cypress Semiconductor in 2020 for roughly EUR 9 billion, and GaN Systems in 2023. Each deal was absorbed into the master brand rather than kept as a separate label.

Recent moves target the highest-growth niches. The 2025 purchase of Marvell's automotive Ethernet business and the agreed EUR 570 million acquisition of a sensor portfolio from ams-OSRAM extend its automotive and industrial positions. The brand's identity now rests on power systems and IoT, the chips that move, control, and secure electricity and data.