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.

To the knowledge of each Reporting Person, neither such Reporting Person, nor any executive officer or director of such Reporting Person, has been convicted during the last five years in any criminal proceeding (excluding traffic violations or similar misdemeanors).

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.

Not applicable.

See Item 5(c) for a discussion of certain transactions by the Reporting Persons in the Common Shares. Thomson Investments Limited, Woodbridge and the other Reporting Persons plan to maintain their controlling interest in Thomson Reuters. From time to time, each of the Reporting Persons may acquire or dispose of Common Shares for liquidity and other reasons. Although there are currently no plans or proposals other than with respect to the acquisition or disposition of less than one half of one percent of the outstanding Common Shares for liquidity or other reasons as noted above, the Reporting Persons may consider or develop plans or proposals in the future that relate to items (a) through (j) below. This may include, but not be limited to, increasing or decreasing their investment in Common Shares and/or engagement with Thomson Reuters, other shareholders, advisors or third-parties with respect to Thomson Reuters' strategy, corporate governance including director nominees, capital structure and strategic alternatives. Except as disclosed herein, none of the Reporting Persons nor, to the knowledge of the Reporting Persons, their respective directors and executive officers, has any plans or proposals that relate to or would result in: (a) the acquisition by any person of additional securities of Thomson Reuters, or the disposition of securities of Thomson Reuters; (b) an extraordinary corporate transaction, such as a merger, reorganization or liquidation, involving Thomson Reuters; (c) a sale or transfer of a material amount of assets of Thomson Reuters; (d) any change in the present Board or management of Thomson Reuters, including any plans or proposals to change the number or term of directors or to fill any existing vacancies on the Board; (e) any material change in the present capitalization or dividend policy of Thomson Reuters; (f) any other material change in Thomson Reuters's business or corporate structure; (g) changes in the charter, bylaws or instruments corresponding thereto of Thomson Reuters or other actions which may impede the acquisition of control of Thomson Reuters by any person; (h) causing a class of securities of Thomson Reuters to be delisted from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered national securities association; (i) a class of equity securities of Thomson Reuters becoming eligible for termination of registration pursuant to Section 12(g)(4) of the Securities Exchange Act of 1934; or (j) any action similar to any of those enumerated 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 September 10, 2025, 1396164 Ontario Limited acquired 45,357 Common Shares pursuant to the Thomson Reuters Amended and Restated Dividend Reinvestment Plan (the "DRIP"). On September 30, 2025, (i) SEG Investments Corp. acquired 1,126,634 Common Shares from 1000921264 Ontario Limited and 1000921265 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921264 Ontario Limited and 1000921265 Ontario Limited) in connection with the wind-up and dissolution of each of 1000921264 Ontario Limited and 1000921265 Ontario Limited, respectively; (ii) BG Investments Corp acquired 285,160 Common Shares from 1000921257 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921257 Ontario Limited) in connection with the wind-up and dissolution of 1000921257 Ontario Limited; (iii) ACG Investments Corp acquired 65,299 Common Shares from 1000921253 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921253 Ontario Limited) in connection with the wind-up and dissolution of1000921253 Ontario Limited; and (iv) 2808194 Ontario Limited acquired 287,060 Common Shares from 1000921254 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921254 Ontario Limited) in connection with the wind-up and dissolution of 1000921254 Ontario Limited. As a result of the foregoing transactions, 1000921264 Ontario Limited, 1000921265 Ontario Limited, 1000921257 Ontario Limited, 1000921253 Ontario Limited and 1000921254 Ontario Limited no longer beneficially hold any Common Shares and, therefore, each such person ceased to be a Reporting Person on September 30, 2025. On September 30, 2025, (i) LCC Investments Corp acquired 2,119,523 Common Shares from 1000921307 Ontario Limited and 1000921309 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921307 Ontario Limited and 1000921309 Ontario Limited), in connection with the wind-up and dissolution of each of 1000921307 Ontario Limited and 1000921309 Ontario Limited, respectively; (ii) 1000421133 Ontario Limited acquired 67,423 Common Shares from 1000921299 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921299 Ontario Limited) in connection with the wind-up and dissolution of 1000921299 Ontario Limited; (iii) 2806335 Ontario Limited acquired 64,585 Common Shares from 1000921297 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921297 Ontario Limited) in connection with the wind-up and dissolution of 1000921297 Ontario Limited; (iv) JRD Investments Corp acquired 287,274 Common Shares from 1000921305 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921305 Ontario Limited) in connection with the wind-up and dissolution of 1000921305 Ontario Limited; and (v) GED Investments Corp acquired 298,675 Common Shares from 1000921303 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921303 Ontario Limited) in connection with the wind-up and dissolution of 1000921303 Ontario Limited. As a result of the foregoing transactions, 1000921307 Ontario Limited,1000921309 Ontario Limited, 1000921299 Ontario Limited, 1000921297 Ontario Limited, 1000921305 Ontario Limited and 1000921303 Ontario Limited no longer beneficially hold any Common Shares and, therefore, each such person ceased to be a Reporting Person on September 30, 2025. On October 2, 2025, (i) TCM Investments Corp acquired 198,755 Common Shares from 1000921268 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921268 Ontario Limited) in connection with the wind-up and dissolution of 1000921268 Ontario Limited; and (ii) DYM Investments Corp acquired 178,101 Common Shares from 1000921259 Ontario Limited (such amount representing all Common Shares beneficially owned by 1000921259 Ontario Limited) in connection with the wind-up and dissolution of 1000921259 Ontario Limited. As a result of the foregoing transactions, 1000921268 Ontario Limited and 1000921259 Ontario Limited no longer beneficially hold any Common Shares and, therefore, each such person ceased to be a Reporting Person on October 2, 2025. On November 6, 2025, 1000706525 Ontario Limited, acquired an aggregate of 62,000,000 Common Shares in connection with the wind-up and dissolution of each of the following subsidiaries of 1000706525 Ontario Limited: 1000927194 Ontario Limited, 1000927196 Ontario Limited, 1000927197 Ontario Limited, 1000927200 Ontario Limited, 1000927201 Ontario Limited, 1000927202 Ontario Limited, 1000927205 Ontario Limited, 1000927207 Ontario Limited, 1000927210 Ontario Limited and 1000927211 Ontario Limited (each a "Woodbridge Subsidiary" and collectively, the "Woodbridge Subsidiaries"). As such, as of November 6, 2025, all 62,000,000 Common Shares formerly beneficially owned in the aggregate by the Woodbridge Subsidiaries are now owned by 1000706525 Ontario Limited. No Woodbridge Subsidiary transferred one (1)% or more of the outstanding Common Shares to 1000706525 Ontario Limited pursuant to its wind-up. In addition, because the Woodbridge Subsidiaries no longer beneficially own any Common Shares, each Woodbridge Subsidiary ceased to be a Reporting Person. As such, this Amendment No. 23 constitutes an exit filing for each Woodbridge Subsidiary and each other entity identified as ceasing or having ceased to be a Reporting Person in this Item 5(c). 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 September 15, 2025, Peter J. Thomson, Director and Co Chairman of Woodbridge, acquired 77 Common Shares as compensation for serving as director of Thomson Reuters. On September 25, 2025, The Nikita Foundation, a charity founded by Peter Thomson and his wife, both of whom sit on the board of directors, sold 25,000 Common Shares.

Not applicable.

Not applicable.

Item 6 is hereby amended to add the following: A Reporting Person has pledged 96,019 Common Shares to Royal Bank of Canada to secure certain obligations under two demand credit facilities. As such, the current aggregate amount of Common Shares pledged by various Reporting Persons to Royal Bank of Canada to secure obligations under nine demand credit facilities is 2,935,697 Common Shares. As of November 10, 2025, David K.R. Thomson, Peter J. Thomson and Michael Friisdahl hold 131,817, 17,127 and 461 deferred share units ("DSUs"), respectively, issued to them by Thomson Reuters for compensation for service as a director of Thomson Reuters. Each DSU has the same value as one Common Share, though DSUs do not have voting rights. DSUs accumulate additional units based on notional equivalents of dividends paid on Common Shares. DSUs are fully vested upon grant, but they are only settled in Common Shares or, at the election of Thomson Reuters, in cash, following termination of the director's board service in respect of Thomson Reuters. Any Common Shares delivered to a director of Thomson Reuters in connection with the settlement of DSUs are purchased in the open market.

Exhibit 1 - Joint Filing Agreement. Exhibit 2 - Power of Attorney. Exhibit 3 - Schedule A.