[6-K] CANADIAN NATIONAL RAILWAY CO Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Canadian National Railway Company filed a Form 6-K for November 2025. The filing includes an exhibit titled “Press Release – CN announces US$700 million debt offering.” The report was signed on November 6, 2025 by Cristina Circelli, Vice-President, Corporate Secretary and General Counsel.

This notice alerts investors that CN has announced a planned debt financing via press release. Specific offering terms and structure would be contained in the referenced exhibit.

Insights

Debt capital markets analyst

6-K flags a planned US$700 million debt raise via press release.

Canadian National Railway submitted a 6-K indicating an exhibit press release announcing a US$700 million debt offering. The filing itself lists the amount and that the instrument is debt.

The potential balance sheet and interest expense impact depend on the offering’s structure, pricing, tenor, and use of proceeds as described in the press release. Market activity will hinge on execution details and investor demand.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16

of the Securities Exchange Act of 1934

For the month of 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 x

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
Date: November 6, 2025	By:	/s/ Cristina Circelli
		Name:	Cristina Circelli
		Title:	Vice-President, Corporate Secretary and General Counsel

CANADIAN NATIONAL RAILWAY COMPANY

Exhibit Index

Exhibit Number	Description of Exhibit
99.1	Press Release – CN announces US$700 million debt offering

FAQ

What did CNI disclose in its Form 6-K?

It included an exhibit press release titled “CN announces US$700 million debt offering.”

How much debt is Canadian National Railway announcing?

The exhibit states a planned US$700 million debt offering.

When was the Form 6-K signed for CNI?

The report was signed on November 6, 2025.

Who signed the CNI Form 6-K?

It was signed by Cristina Circelli, Vice-President, Corporate Secretary and General Counsel.

What exhibits are included with the CNI 6-K?

Exhibit 99.1 is a press release titled “CN announces US$700 million debt offering.”

What is the form type filed by CNI?

Canadian National Railway filed a Form 6-K (Report of Foreign Issuer).