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Significant Subsidiaries (Tables) | 12 Months Ended
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Oct. 31, 2025
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Summary of Significant Operating Subsidiaries | As at October 31, 2025, the bank, either directly or indirectly through its subsidiaries, controls the following significant operating subsidiaries.
Significant subsidiaries (1) (2) |  | Head or principal office |  |  | Book value of shares owned by the bank (Canadian $ in millions) |
AIR MILES Loyalty Inc. |  |  | Toronto, Canada |  |  |  | $             19 |
Bank of Montreal (China) Co. Ltd. |  |  | Beijing, China |  |  |  | 497 |
Bank of Montreal Europe Public Limited Company |  |  | Dublin, Ireland |  |  |  | 1,391 |
Bank of Montreal Holding Inc. and subsidiaries, including: |  |  | Toronto, Canada |  |  |  | 35,455 |
Bank of Montreal Mortgage Corporation |  |  | Calgary, Canada |  |  |  |  |
BMO Mortgage Corp. |  |  | Vancouver, Canada |  |  |  |  |
BMO Investments Inc. |  |  | Toronto, Canada |  |  |  |  |
BMO InvestorLine Inc. |  |  | Toronto, Canad a |  |  |  |  |
BMO Nesbitt Burns Inc. |  |  | Toronto, Canada |  |  |  |  |
BMO Private Investment Counsel Inc. |  |  | Toronto, Canada |  |  |  |  |
BMO Private Equity (Canada) Inc. |  |  | Toronto, Canada |  |  |  |  |
BMO Capital Markets Limited |  |  | London, England |  |  |  | 434 |
BMO Capital Partners Inc. |  |  | Toronto, Canada |  |  |  | 1,067 |
BMO Financial Corp. and subsidiaries, including: |  |  | Chicago, United States |  |  |  | 60,146 |
BMO Bank National Association |  |  | Chicago, United States |  |  |  |  |
BMO Capital Markets Corp. |  |  | New York, United States |  |  |  |  |
BMO Japan Securities Ltd. |  |  | Tokyo, Japan |  |  |  | 6 |
BMO Life Insurance Company and subsidiary |  |  | Toronto, Canada |  |  |  | 1,430 |
BMO Life Assurance Company |  |  | Toronto, Canada |  |  |  |  |
BMO Trust Company |  |  | Toronto, Canada |  |  |  | 630 |
| (1) | Each subsidiary is incorporated or organized under the laws of the state or country in which the principal office is situated, except for BMO Financial Corp. and BMO Capital Markets Corp., which are incorporated under the laws of the state of Delaware, United States.
| (2) | Unless otherwise noted, the bank, either directly or indirectly through its subsidiaries, owns 100% of the outstanding voting shares of each subsidiary.

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- Definition The disclosure of subsidiaries. [Refer: Total for all subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 17 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph B4 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B4_a&doctype=Appendix&subtype=B -URIDate 2024-03-27 + Details
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