BMO: 6-K company filing

6-K 1 d22838d6k.htm 6-K 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of: September, 2026 Commission File Number: 001-13354 BANK OF MONTREAL (Name of Registrant) 100 King Street West 1 First Canadian Place Toronto, Ontario Canada, M5X 1A1 (Executive Offices) 129 rue Saint-Jacques Montreal, Quebec Canada, H2Y 1L6 (Head Office) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F: Form 20-F ☐ Form 40-F ☒ INCORPORATION BY REFERENCE The information contained in this Form 6-K and any exhibits hereto shall be deemed filed with the Securities and Exchange Commission (“SEC”) solely for purposes of incorporation by reference into and as part of the following registration statement of the registrant on file with and declared effective by the SEC: 1. Registration Statement – Form F-3 – File No. 333-285508 EXHIBIT INDEX Exhibit Description of Exhibit 5.1 Opinion of Sullivan & Cromwell LLP, U.S. counsel to the Bank. 5.2 Opinion of Osler, Hoskin & Harcourt LLP, Canadian counsel to the Bank. 23.1 Consent of Sullivan & Cromwell LLP (included in Exhibit 5.1 above). 23.2 Consent of Osler, Hoskin & Harcourt LLP (included in Exhibit 5.2 above). SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. BANK OF MONTREAL By: /s/ Paras Jhaveri Name: Paras Jhaveri Title: Deputy Treasurer, Global Head of Capital & Funding and Balance Sheet Management Date : September 15, 2026