SiRF Technology Holdings, Inc. (“SIRF/SIRF1C”)
Merger Complete with CSR plc

Attached, for your information is memo #26069 from the Options Clearing Corporation.

We urge you to read this (see link) and distribute to others within your organization you deem
appropriate.

http://www.optionsclearing.com/market/infomemos/2009/jun/26069.pdf

Key Information:
SIRF1C Cash Merger $4.11 per Share – Contract Value $411.00
Last Trading Day On: 6/26/09
Accelerated Settlement per Rule 1304 of OCC’s Rule and Bylaws 6/29/09

* Member firms must determine if the new GTC order terms meet their clients’ objectives and cancel
or cancel/replace orders as appropriate.