UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

~~FORM~~ Form 6-K

~~REPORT~~Report of OFForeign ~~FOREIGN~~Issuer ~~ISSUER~~Pursuant ~~PURSUANT~~to ~~TO RULE~~ Rule 13a-16 ORor 15d-16

OFof ~~THE~~the Securities ~~SECURITIES~~Exchange ~~EXCHANGE~~Act ~~ACT~~of OF 1934

For the month of ~~October~~ November 2025

Commission File Number: 001-02413

Canadian National Railway Company

(Translation of registrant'’s name into English)

935 de la Gauchetiere Street West

Montreal, Quebec

Canada H3B 2M9

(Address of principal executive offices)

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 Xx

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.

Canadian National Railway Company

~~Canadian National Railway Company~~

Date:

October 31, 2025

By:

/s/ Cristina Circelli

Date: November 6, 2025

By:

/s/ Cristina Circelli

Name:

Cristina Circelli

~~Name:~~

~~Cristina Circelli~~

Title:

Vice-President, Corporate Secretary and General Counsel

~~Title:~~

~~Vice-President, Deputy Corporate Secretary and General Counsel~~

~~Canadian~~CANADIAN ~~National~~NATIONAL ~~Railway~~RAILWAY ~~Company~~COMPANY

Table of Content

Exhibit Number		Description of Exhibit
Items	Description
Ex 99.1		Earnings News Release
1	2025 Investor Fact Book
Ex 99.2		Unaudited Interim Consolidated Financial Statements and Notes Thereto
Ex 99.3		Management's Discussion and Analysis
Ex 99.4		CEO and CFO Certificates

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