144 0001397960 XXXXXXXX LIVE 0001075124 THOMSON REUTERS CORP /CAN/ 001-31349 19 Duncan Street TORONTO A6 M5H 3H1 416 6877500 The Woodbridge Company Limited 10% Stockholder Common Shares BMO Capital Markets Corp.

151 West 42nd Street New York NY 10036

1000000 83720000 436538837 05/27/2026 Nasdaq Common Shares 04/17/2008 Various. See Note (2) See Note (2) N 452082798 04/17/2008 See Note (2) N The Woodbridge Company Limited (See Note 3)

65 Queen Street West, Suite 2400 Toronto A6 M5H 2M8

Common Shares 03/18/2026 200000 18817358 The Woodbridge Company Limited (See Note 3)

65 Queen Street West, Suite 2400 Toronto A6 M5H 2M8

Common Shares 03/19/2026 200000 18651346 The Woodbridge Company Limited (See Note 3)

65 Queen Street West, Suite 2400 Toronto A6 M5H 2M8

Common Shares 03/20/2026 200000 18580650 (1) The 436,538,837 Common Shares of the Issuer outstanding are as of May 4, 2026. (2) April 17, 2008 refers to the date on which The Thomson Corporation completed its acquisition of Reuters Group PLC and renamed the surviving company as Thomson Reuters Corporation. Subsequent to such date, Common Shares have been (i) acquired pursuant to dividend reinvestment and other immaterial transactions; and (ii) disposed of by way of sales on the Toronto Stock Exchange ("TSX") and Nasdaq Global Select Market and in connection with the Issuer's Substantial Issuer Bid/Tender Offer in October 2018. The Issuer's announced stock consolidations also had the effect of reducing the number of Common Shares owned by the reporting person. (3) Gross proceeds from Common Shares sold on TSX have been converted to USD using an average of the CAD/USD conversion rates on the relevant date of sale as reported by the Bank of Canada. 05/26/2026 By: /s/ Michael Medline, Title: CEO & President