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The company's 2012 business outlook is based on various external and internal assumptions. Economic and market assumptions include, but are not limited to, positive GDP growth in the countries where Thomson Reuters operates led by rapidly developing economies and a continued increase in the number of professionals around the world and their demand for high quality information and services. Internal financial and operational assumptions include, but are not limited to, the successful execution of the company's ongoing product release programs, globalization strategy, other growth initiatives and efficiency initiatives.

Some of the material risk factors that could cause actual results or events to differ materially from those expressed in or implied by forward-looking statements in this news release include, but are not limited to, changes in the general economy (including the current European Union debt crisis); actions of competitors; failure to develop new products, services, applications and functionalities to meet customers' needs, attract new customers or expand into new geographic markets; increased accessibility to free or relatively inexpensive information sources; failures or disruptions of network systems or the Internet; failure to maintain a high renewal rate for subscription-based services; dependency on third parties for data, information and other services; changes to law and regulations, including the impact of the Dodd-Frank legislation and similar financial services laws around the world; failure to adapt to recent organizational changes; failure to recruit, motivate and retain high quality management and key employees; failure to meet the challenges involved in operating globally; failure to protect the brands and reputation of Thomson Reuters; additional impairment of goodwill and identifiable intangible assets; inadequate protection of intellectual property rights; threat of legal actions and claims; risk of antitrust/competition-related claims or investigations; downgrading of credit ratings and adverse conditions in the credit markets; fluctuations in foreign currency exchange and interest rates; the effect of factors outside of the control of Thomson Reuters on funding obligations in respect of pension and post-retirement benefit arrangements; actions or potential actions that could be taken by the company's principal shareholder, The Woodbridge Company Limited, and failure to derive fully the anticipated benefits from existing or future acquisitions, joint ventures, investments or dispositions. These and other factors are discussed in materials that Thomson Reuters from time to time files with, or furnishes to, the Canadian securities regulatory authorities and the U.S. Securities and Exchange Commission. Thomson Reuters annual and quarterly reports are also available in the "Investor Relations" section of www.thomsonreuters.com.

Thomson Reuters will webcast a discussion of its first-quarter 2012 results today beginning at 8:30 a.m. Eastern Daylight Time (EDT). You can access the webcast by visiting the "Investor Relations" section of www.thomsonreuters.com. An archive of the webcast will be available following the presentation.