Bank of Montreal (BMO) 6-K Bank of Montreal Announces Conversion Privilege of $300,000,000Non-Cumulative5-year Rate Reset Class B Preferred Shares, Series 31

FORM6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule13a-16 or15d-16

of the Securities Exchange Act of 1934

For the month of: September, 2019 Commission File Number:001-13354

BANK OF MONTREAL

(Name of Registrant)

100 King Street West 1 First Canadian Place Toronto, Ontario Canada, M5X 1A1	129 rue Saint-Jacques Montreal, Quebec Canada, H2Y 1L6
(Executive Offices)	(Head Office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form20-F or Form40-F:

Form20-F  ☐            Form40-F  ☑

Indicate by check mark if the registrant is submitting the Form6-K in paper as permitted by RegulationS-T Rule 101(b)(1):  ☐

Indicate by check mark if the registrant is submitting the Form6-K in paper as permitted by RegulationS-T Rule 101(b)(7):  ☐

INCORPORATION BY REFERENCE

The information contained in this Form6-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 statements of the registrant on file with and declared effective by the SEC:

1. Registration Statement – FormF-3 – FileNo. 333-217200

2. Registration Statement – FormF-3 – FileNo. 333-214934

3. Registration Statement – FormS-8 – FileNo. 333-191591

4. Registration Statement – FormS-8 – FileNo. 333-180968

5. Registration Statement – FormS-8 – FileNo. 333-177579

6. Registration Statement – FormS-8 – FileNo. 333-177568

7. Registration Statement – FormS-8 – FileNo. 333-176479

8. Registration Statement – FormS-8 – FileNo. 333-175413

9. Registration Statement – FormS-8 – FileNo. 333-175412

10. Registration Statement – FormS-8 – FileNo. 333-113096

11. Registration Statement – FormS-8 – FileNo. 333-14260

12. Registration Statement – FormS-8 – FileNo. 33-92112

13. Registration Statement – FormS-8 – FileNo. 333-207739

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/ Thomas E. Flynn
	Name:	Thomas E. Flynn
	Title:	Chief Financial Officer
Date: September 27, 2019	By:	/s/ Barbara M. Muir
	Name:	Barbara M. Muir
	Title:	Corporate Secretary

EXHIBIT INDEX

Exhibit	Description of Exhibit
99.1	Press Release –Bank of Montreal Announces Conversion Privilege of $300,000,000Non-Cumulative5-year Rate Reset Class B Preferred Shares, Series 31