Cameco (CCJ) 6-K Current report (foreign)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM6-K

Report of Foreign Private Issuer

Pursuant to Rule13a-16 or15d-16

Under the Securities Exchange Act of 1934

For the month of July, 2018

Cameco Corporation

(Commission fileNo. 1-14228)

2121-11th Street West

Saskatoon, Saskatchewan, Canada S7M 1J3

(Address of Principal Executive Offices)

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

Form20-F  ☐                Form40-F  ☑

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule12g3-2(b) under the Securities Exchange Act of 1934.

Yes  ☐                No  ☑

If “Yes” is marked, indicate below the file number assigned to the registrant in connection withRule 12g3-2(b):

Exhibit Index

Exhibit No.	Description	Page No.
1.	Material Change Report dated July 31, 2018

SIGNATURE

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.

Date: July 31, 2018	Cameco Corporation
	By:	“Sean A. Quinn”
		Sean A. Quinn
		Senior Vice-President, Chief Legal Officer and Corporate Secretary