CSR was listed on the London Stock Exchange and was a constituent of the FTSE 250 Index until it was acquired by Qualcomm in August 2015.

The founding directors, who were all at Cambridge Consultants at the time were Phil O'Donovan,[2] James Collier and Glenn Collinson.

[10] In May 2012, CSR acquired Direct Digital Feedback Amplifier (DDFA) technology, a proprietary, highly scalable digital Class-D audio amplifier technology;[11] in June 2012, CSR announced that it had acquired the MAPX (formerly MAP-X) audio product line from Trident Microsystems, Inc[12] and in July 2012, Samsung Electronics agreed to acquire CSR's mobile phone connectivity (Bluetooth and Wi-Fi) and location (GPS/GNSS) businesses and associated IP for US$310 million (£198 million).

[16] CSR's products included platform solutions for Bluetooth, GPS, FM broadcasting, Wi-Fi, audio, imaging, and ARM processors.

[17] After the Zoran merger, CSR also made digital imaging products based on the MIPS architecture.