SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

THOMSON INVESTMENTS LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 312,518,088.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 312,518,088.00

Aggregate amount beneficially owned by each reporting person

312,518,088.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

70.56 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to rows 8 and 10 above, includes 300,790,959 common shares of Thomson Reuters Corporation ("Common Shares") beneficially owned by The Woodbridge Company Limited and subsidiaries and 11,727,129 Common Shares beneficially owned by the family of the late Roy H. Thomson, the first Lord Thomson of Fleet through various affiliated corporations. In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

THE WOODBRIDGE COMPANY LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 300,790,959.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 300,790,959.00

Aggregate amount beneficially owned by each reporting person

300,790,959.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

67.91 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1908720 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 202,322,148.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 202,322,148.00

Aggregate amount beneficially owned by each reporting person

202,322,148.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

45.7 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1000706525 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 84,798,839.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 84,798,839.00

Aggregate amount beneficially owned by each reporting person

84,798,839.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

19.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1396164 Ontario Limited

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 13,160,949.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 13,160,949.00

Aggregate amount beneficially owned by each reporting person

13,160,949.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

2.9 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1925124 Ontario Limited

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 506,720.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 506,720.00

Aggregate amount beneficially owned by each reporting person

506,720.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

Woodbridge Investments Corporation

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 2,303.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 2,303.00

Aggregate amount beneficially owned by each reporting person

2,303.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

KRT INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 87,754.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 87,754.00

Aggregate amount beneficially owned by each reporting person

87,754.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

DKRT FAMILY CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 276,864.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 276,864.00

Aggregate amount beneficially owned by each reporting person

276,864.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

DKRT INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 327,761.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 327,761.00

Aggregate amount beneficially owned by each reporting person

327,761.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

DKRT FUNDING CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 137,630.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 137,630.00

Aggregate amount beneficially owned by each reporting person

137,630.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1000920847 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 260,000.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 260,000.00

Aggregate amount beneficially owned by each reporting person

260,000.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

MB FINANCE CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,596.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,596.00

Aggregate amount beneficially owned by each reporting person

1,596.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

TT INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 16,516.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 16,516.00

Aggregate amount beneficially owned by each reporting person

16,516.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

TLT INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 530,176.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 530,176.00

Aggregate amount beneficially owned by each reporting person

530,176.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.12 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

TLT ISSUE HOLDCO A CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 195,900.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 195,900.00

Aggregate amount beneficially owned by each reporting person

195,900.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

TLT ISSUE HOLDCO CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 759,751.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 759,751.00

Aggregate amount beneficially owned by each reporting person

759,751.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.17 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1761173 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,422,190.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,422,190.00

Aggregate amount beneficially owned by each reporting person

1,422,190.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.32 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

2677295 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 697,006.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 697,006.00

Aggregate amount beneficially owned by each reporting person

697,006.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.16 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1000919995 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 260,000.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 260,000.00

Aggregate amount beneficially owned by each reporting person

260,000.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1754693 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 437,878.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 437,878.00

Aggregate amount beneficially owned by each reporting person

437,878.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

PJT INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 270,297.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 270,297.00

Aggregate amount beneficially owned by each reporting person

270,297.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1000920848 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 260,000.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 260,000.00

Aggregate amount beneficially owned by each reporting person

260,000.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

PGF INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 20,358.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 20,358.00

Aggregate amount beneficially owned by each reporting person

20,358.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

PGF FAMILY CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 19,984.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 19,984.00

Aggregate amount beneficially owned by each reporting person

19,984.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

LCC INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,777,670.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,777,670.00

Aggregate amount beneficially owned by each reporting person

1,777,670.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.4 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1000078931 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 357,105.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 357,105.00

Aggregate amount beneficially owned by each reporting person

357,105.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1000421133 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 39,832.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 39,832.00

Aggregate amount beneficially owned by each reporting person

39,832.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

LLD INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 96,804.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 96,804.00

Aggregate amount beneficially owned by each reporting person

96,804.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

2806335 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 64,585.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 64,585.00

Aggregate amount beneficially owned by each reporting person

64,585.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

JRD INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 412,843.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 412,843.00

Aggregate amount beneficially owned by each reporting person

412,843.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

2754783 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 6,988.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 6,988.00

Aggregate amount beneficially owned by each reporting person

6,988.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

GED INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 485,738.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 485,738.00

Aggregate amount beneficially owned by each reporting person

485,738.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

SEG INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 477,059.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 477,059.00

Aggregate amount beneficially owned by each reporting person

477,059.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1000031857 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 444,575.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 444,575.00

Aggregate amount beneficially owned by each reporting person

444,575.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

SEG FAMILY CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 66,546.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 66,546.00

Aggregate amount beneficially owned by each reporting person

66,546.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

TCM INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 268,255.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 268,255.00

Aggregate amount beneficially owned by each reporting person

268,255.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

DYM INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 254,129.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 254,129.00

Aggregate amount beneficially owned by each reporting person

254,129.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

BG INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 521,530.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 521,530.00

Aggregate amount beneficially owned by each reporting person

521,530.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

ACG INVESTMENTS CORP.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 233,236.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 233,236.00

Aggregate amount beneficially owned by each reporting person

233,236.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

1001404651 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,513.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,513.00

Aggregate amount beneficially owned by each reporting person

1,513.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

CUSIP Number(s):

884903709

Name of reporting person

2808194 ONTARIO LIMITED

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 237,060.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 237,060.00

Aggregate amount beneficially owned by each reporting person

237,060.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

In reference to row 13 above, based on 442,934,310 Common Shares outstanding as of March 31, 2026.

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Common Shares of Thomson Reuters Corporation

(b)

Name of Issuer:

THOMSON REUTERS CORP /CAN/

(c)

Address of Issuer's Principal Executive Offices:

19 Duncan Street, Toronto, ONTARIO, CANADA , M5H 3H1.

Item 1 Comment:

Explanatory Note: The common shares (the "Common Shares") of Thomson Reuters Corporation ("Thomson Reuters") that are the subject matter of this Amendment 24 to Schedule 13D are beneficially owned by Thomson Investments Limited, The Woodbridge Company 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 (each a "Reporting Person" and collectively, the "Reporting Persons"). Woodbridge, a private company, is the primary investment vehicle for members of the family of the late Roy H. Thomson, the first Lord Thomson of Fleet. Prior to his death in 2006, Kenneth R. Thomson controlled Thomson Reuters through Woodbridge. He did so by holding shares of a holding company of Woodbridge, Thomson Investments Limited. Under his estate arrangements, the 2003 TIL Settlement, a trust of which The Bank of Nova Scotia Trust Company (the "Trust Company") is trustee and members of the family of the late first Lord Thomson of Fleet are beneficiaries, holds those holding company shares. Kenneth R. Thomson established these arrangements to provide for long-term stability of the business of Woodbridge. The equity of Woodbridge continues to be owned by members of successive generations of the family of the first Lord Thomson of Fleet. Under the Kenneth R. Thomson estate arrangements, the directors and officers of Woodbridge are responsible for its business and operations. In certain limited circumstances, including very substantial dispositions of Common Shares by Woodbridge, the estate arrangements provide for approval of the Trust Company, as trustee, to be obtained. As of April 9, 2026, Thomson Investments Limited is the beneficial owner of 312,518,088 Common Shares, representing approximately 70.56% of the outstanding Common Shares. Of those Common Shares, Woodbridge is the beneficial owner of 300,790,959 Common Shares, representing approximately 67.91% of the outstanding Common Shares. This Amendment No. 24 to Schedule 13D is being filed to report certain information under Item 2, Item 4, Item 5, Item 6, Item 7 and Schedule A (attached as Exhibit 3) hereto. This Schedule 13D amends, restates and updates the amendment to Schedule 13D filed by Woodbridge on November 10, 2025. There has been no material change in the Thomson family's beneficial ownership of Common Shares since then.

Item 2.

Identity and Background

(a)

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.

(b)

See Schedule A for the address of each Reporting Person.

(c)

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

(d)

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).

(e)

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.

(f)

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.

Item 3.

Source and Amount of Funds or Other Consideration

Not applicable.

Item 4.

Purpose of Transaction

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. On April 15, 2026, Woodbridge announced that its new President and CEO, Michael Medline will stand for election to the board of directors of Thomson Reuters (the "Board") at the upcoming annual meeting of shareholders to be held on June 10, 2026 (the "AGM"). Following his election, Mr. Medline will serve on the Board as a representative of Woodbridge. Information regarding Mr. Medline is included in Thomson Reuters' management proxy circular for the AGM. Under a Third Amended and Restated Thomson Reuters Trust Principles Support Agreement, dated as of October 1, 2018, between Woodbridge and Thomson Reuters Founders Share Company Limited (attached as Exhibit 4), Woodbridge has agreed to support the Thomson Reuters Trust Principles (the "Trust Principles") and to exercise its voting rights to give effect to this support and the Thomson Reuters Founders Share Company has irrevocably designated Woodbridge as an approved person for so long as Woodbridge is controlled by members of the Thomson family, companies controlled by them and trusts for their benefit. The Trust Principles read as follows: _ That Reuters shall at no time pass into the hands of any one interest, group or faction; _ That the integrity, independence and freedom from bias of Thomson Reuters shall at all times be fully preserved; _ That Reuters shall supply unbiased and reliable news services to newspapers, news agencies, broadcasters and other media subscribers and to businesses, governments, institutions, individuals and others with whom Reuters has or may have contracts; _ That Thomson Reuters shall pay due regard to the many interests which it serves in addition to those of the media; and _ That no effort shall be spared to expand, develop and adapt the news and other services and products of Thomson Reuters so as to maintain its leading position in the international news and information business.

Item 5.

Interest in Securities of the Issuer

(a)

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.

(b)

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.

(c)

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.

(d)

Not applicable.

(e)

Not applicable.

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer

Item 6 is hereby amended to add the following: As of April 17, 2026, David K. R. Thomson, Peter J. Thomson and Michael Friisdahl hold 135,916, 17,928 and 1,596 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.

Item 7.

Material to be Filed as Exhibits.

Exhibit 1 - Joint Filing Agreement. Exhibit 2 - Power of Attorney. Exhibit 3 - Schedule A. Exhibit 4 - Third Amended and Restated Thomson Reuters Trust Principles Support Agreement, dated as of October 1, 2018, between Woodbridge and Thomson Reuters Founders Share Company Limited.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

THOMSON INVESTMENTS LIMITED

Signature:	/s/ Michael Medline
Name/Title:	CEO & President
Date:	04/17/2026

THE WOODBRIDGE COMPANY LIMITED

Signature:	/s/ Michael Medline
Name/Title:	CEO & President
Date:	04/17/2026

1908720 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	CEO & President
Date:	04/17/2026

1000706525 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	CEO & President
Date:	04/17/2026

1396164 Ontario Limited

Signature:	/s/ Michael Medline
Name/Title:	CEO & President
Date:	04/17/2026

1925124 Ontario Limited

Signature:	/s/ Michael Medline
Name/Title:	CEO & President
Date:	04/17/2026

Woodbridge Investments Corporation

Signature:	/s/ Michael Medline
Name/Title:	CEO & President
Date:	04/17/2026

KRT INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

DKRT FAMILY CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

DKRT INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

DKRT FUNDING CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1000920847 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

MB FINANCE CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

TT INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

TLT INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

TLT ISSUE HOLDCO A CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

TLT ISSUE HOLDCO CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1761173 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

2677295 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1000919995 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1754693 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

PJT INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1000920848 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

PGF INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

PGF FAMILY CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

LCC INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1000078931 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1000421133 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

LLD INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

2806335 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

JRD INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

2754783 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

GED INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

SEG INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1000031857 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

SEG FAMILY CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

TCM INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

DYM INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

BG INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

ACG INVESTMENTS CORP.

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

1001404651 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026

2808194 ONTARIO LIMITED

Signature:	/s/ Michael Medline
Name/Title:	Attorney-in-fact
Date:	04/17/2026