UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

THOMSON REUTERS CORPORATION

(Translation of registrant’s name into English)

333 Bay Street, Suite 400

Toronto, Ontario M5H 2R2, Canada

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  ☐                Form 40-F  ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

EXHIBIT INDEX

Exhibit 99.1

Thomson Reuters Confirms Advanced Discussions with Blackstone

Regarding Financial & Risk (F&R) Business

TORONTO, January 29, 2018 – Thomson Reuters (TSX/NYSE: TRI) announced today that it is in advanced discussions with Blackstone regarding a potential partnership in its F&R business.

The F&R business provides a broad and robust range of offerings to financial markets professionals, with $6.1 billion in revenues in 2016. F&R delivers global content sets, including fundamentals, estimates and primary and secondary research alongside tools, platforms, venues and services to enable fast, intelligent decision-making and trading. F&R also provides leading regulatory and risk management solutions to help customers anticipate and manage risk and compliance.

As part of any proposed partnership, Thomson Reuters would retain a significant interest in the F&R business and would retain full ownership of its Legal, Tax & Accounting and Reuters News businesses.

The discussions between Thomson Reuters and Blackstone may or may not lead to a definitive agreement. Thomson Reuters does not expect to comment further on market speculation or disclose any further developments unless and until it determines that further disclosure is appropriate or required.

Thomson Reuters

Thomson Reuters is the world’s leading source of news and information for professional markets. Our customers rely on us to deliver the intelligence, technology and expertise they need to find trusted answers. The business has operated in more than 100 countries for more than 100 years. Thomson Reuters shares are listed on the Toronto and New York Stock Exchanges (symbol: TRI). For more information, visit www.thomsonreuters.com.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements in this news release are forward-looking. These forward-looking statements are based on certain assumptions and reflect our company’s current expectations. As a result, forward-looking statements are subject to a number of risks and uncertainties that could cause actual results or events to differ materially from current expectations, including factors 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. There is no assurance that the discussions described in this news release will lead to a definitive agreement or that other events described in any forward-looking statement will materialize. Except as may be required by applicable law, Thomson Reuters disclaims any obligation to update or revise any forward-looking statements.

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