Common Shares of Thomson Reuters Corporation

THOMSON REUTERS CORP /CAN/

19 Duncan Street, Toronto, A6, M5H 3H1

Thomson Investments Limited, Woodbridge, 1908720 Ontario Limited, 1000706525 Ontario Limited, 1396164 Ontario Limited, 1925124 Ontario Limited, Woodbridge Investments Corporation, KRT Investments Corp., DKRT Family Corp., DKRT Investments Corp., DKRT Funding Corp., 1000920847 Ontario Limited, MB Finance Corp., TT Investments Corp., TLT Investments Corp., TLT Issue Holdco A Corp., TLT Issue Holdco Corp., 1761173 Ontario Limited, 2677295 Ontario Limited, 1000919995 Ontario Limited, 1754693 Ontario Limited, PJT Investments Corp., 1000920848 Ontario Limited, PGF Investments Corp., PGF Family Corp., LCC Investments Corp., 1000078931 Ontario Limited, 1000421133 Ontario Limited, LLD Investments Corp., 2806335 Ontario Limited, JRD Investments Corp., 2754783 Ontario Limited, GED Investments Corp., SEG Investments Corp, 1000031857 Ontario Limited, SEG Family Corp., TCM Investments Corp., DYM Investments Corp., BG Investments Corp., ACG Investments Corp., 1001404651 Ontario Limited and 2808194 Ontario Limited.

See Schedule A for the address of each Reporting Person.

See Schedule A for certain information as to the executive officers and directors of each Reporting Person.

Further, to the knowledge of each Reporting Person, neither such Reporting Person, nor any executive officer or director of such Reporting Person, has been a party during the last five years to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violation of, or prohibiting or mandating activities subject to, U.S. federal or state securities laws, or finding any violation with respect to such laws.

See Schedule A for certain information as to the executive officers and directors of each Reporting Person. For further explanation of the background of the arrangements relating to ownership of Common Shares, see the "Explanatory Note" above.

See cover pages of this Amendment for each of the Reporting Persons and Schedule A for each of the directors and executive officers of the Reporting Persons.

See cover pages of this Amendment for each of the Reporting Persons and Schedule A for each of the directors and executive officers of the Reporting Persons.

None of the Reporting Persons has effected any transactions in Common Shares during the past 60 days, except as set forth below. On March 10, 2026, 1396164 Ontario Limited acquired 96,913 Common Shares pursuant to the Thomson Reuters Amended and Restated Dividend Reinvestment Plan (the "DRIP"). The following entities (each a "Participating Entity" and collectively the "Participating Entities") sold Common Shares in the open market between March 18, 2026 and March 20, 2026: LCC Investments Corp. sold 190,400 Common Shares; 1000421133 Ontario Limited sold 12,006 Common Shares; GED Investments Corp. sold 53,101 Common Shares; JRD Investments Corp. sold 44,493 Common Shares; SEG Investments Corp. sold 175,000 Common Shares; BG Investments Corp. sold 50,000 Common Shares; DYM Investments Corp. sold 25,000 Common Shares; and 2808194 Ontario Limited. sold 50,000 Common Shares. On each of March 18, 19 and 20, 2026, 200,000 Common Shares were sold by the Participating Entities on a collective basis (with sales allocated among them pro rata). On March 18, 2026, 125,000 Common Shares were sold on a US exchange at an average price of $94.08 and 75,000 Common Shares were sold on a Canadian exchange at an average price of C$128.97. On March 19, 2026, 125,000 Common Shares were sold on a US exchange at an average price of $93.24 and 75,000 Common Shares were sold on a Canadian exchange at an average price of C$128.06. On March 20, 2026, 135,000 Common Shares were sold on a US exchange at an average price of $92.94 and 65,000 Common Shares were sold on a Canadian exchange at an average price of C$127.34. Additionally, on March 20, 2026, the following entities sold Common Shares to an affiliated entity, DKRT Family Corp., in a private transaction: LCC Investments Corp. sold 57,764 Common Shares, LLD Investments Corp. sold 4,513 Common Shares, JRD Investments Corp. sold 16,059 Common Shares, GED Investments Corp. sold 19,166 Common Shares and SEG Investments Corp. sold 97,502 Common Shares. These Common Shares were sold pre-market open at a price of C$128.20 per Common Share, which reflects the closing price of the Common Shares on the Canadian exchange the day prior to the sale. On April 16, 2026, 1000706525 Ontario Limited transferred 13,550,000 Common Shares to 1908720 Ontario Limited for consideration consisting of 690 common shares of 1908720 Ontario Limited. None of the executive officers or directors of the Reporting Persons has effected any transactions in Common Shares during the past 60 days, except as set forth below. On March 12, 2026, Michael Medline, CEO and President of Woodbridge, acquired 3,644 Common Shares in the open market. On March 15, 2026, Peter J. Thomson, Director and Co Chairman of Woodbridge, acquired 134 Common Shares as compensation for serving as director of Thomson Reuters.

Not applicable.

Not applicable.