27 September 2012

CSR plc

Shareholder Notification

CSR plc ("the Company") has recently received a notification pursuant to the FSA's Disclosure and Transparency Rules. Porter Orlin LLC has advised that in its role as adviser to the clients listed below, the number of shares in the Company in which Porter Orlin LLC hold the voting rights are as follows:

Porter Orlin LLC

for the advised funds

Amici Associates L.P.

Amici Qualified Associates L.P.

Amici Fund International, Ltd.

The Collectors' Fund L.P.

Lightpath Capital L.P.

Third Party Fund (G)

Third Party Fund (P)

10,271,653 (5.05%)


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