# EDGAR Filing Document

**Accession Number:** 0001009001
**File Stem:** 0001193125-26-216519
**Filing Date:** 2026-5
**Character Count:** 5257
**Document Hash:** 9a11136302317df0eb3065af528ab0c0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-216519.hdr.sgml**: 20260511

**ACCESSION NUMBER**: 0001193125-26-216519

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20260511

**FILED AS OF DATE**: 20260511

**DATE AS OF CHANGE**: 20260511

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CAMECO CORP
- **CENTRAL INDEX KEY:** 0001009001
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISCELLANEOUS METAL ORES [1090]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 980113090
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-14228
- **FILM NUMBER:** 26962557

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 2121 11TH ST W
- **CITY:** SASKATOON
- **PROVINCE COUNTRY:** Z4
- **BUSINESS PHONE:** 3069566200

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 2121 11TH ST W.
- **CITY:** SASKATOON
- **PROVINCE COUNTRY:** Z4

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, DC 20549** 

**FORM 6-K** 

**REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-16 OR 15D-16** 

**UNDER THE SECURITIES EXCHANGE ACT OF 1934** 

For the month of May, 2026

Commission File Number 1-14228

**Cameco Corporation** 

(Translation of Registrant's Name into English)

**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 Form 20-F or Form 40-F.

Form 20-F Form 40-F <u>✓</u> 

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| | |
|:---|:---|
| **<u>Exhibit Index</u>** | **<u>Exhibit Index</u>** |
| <u>Exhibit No.</u> | <u>Description</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;99.1 | [Press Release dated May 10, 2026](d143481dex991.htm) |

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**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.

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| | |
|:---|:---|
| Date: May 11, 2026 | Cameco Corporation |
|  | By: <u>/s/ R. Liam Mooney</u> |
|  | R. Liam Mooney |
|  | Senior Vice-President and Chief Legal Officer |

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## Exhibit 99.1

**Exhibit 99.1**![LOGO](g143481g0511220942086.jpg)

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| | | |
|:---|:---|:---|
| **NEWS RELEASE**<br>*All amounts in Canadian dollars*<br> *unless specified otherwise* | www.cameco.com | **Saskatoon**<br>Saskatchewan<br> Canada |
| **NEWS RELEASE**<br>*All amounts in Canadian dollars*<br> *unless specified otherwise* | www.cameco.com | **Saskatoon**<br>Saskatchewan<br> Canada |
| **NEWS RELEASE**<br>*All amounts in Canadian dollars*<br> *unless specified otherwise* | www.cameco.com | **Saskatoon**<br>Saskatchewan<br> Canada |

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**Northern Saskatchewan Operations Update** 

**May 10, 2026** 

**Cameco (TSX: CCO; NYSE: CCJ)** today provided an operational update for our northern Saskatchewan sites amidst flooding in the region, which is impacting roadways.

Our northern Saskatchewan sites are not directly impacted by flood waters. However, flooding has caused the collapse of the Smoothstone River Bridge, which is on the primary route we use to transport supplies to the McArthur River and Key Lake sites, and there are restrictions in place on the use of an alternative roadway. We are in regular contact with the Saskatchewan Ministry of Highways, and we are working with our sites to minimize the impact of delivery disruptions. However, we have temporarily halted production activities at Key Lake mill and reduced activity at McArthur River mine until the normal delivery of critical operating materials can resume. The timeline for the resumption of normal deliveries is currently unknown.

At present, the Cigar Lake mine continues to operate, and our consolidated annual production plan remains unchanged. Depending on the duration of the road restrictions and our ability to make deliveries of critical operating materials, there is a risk that our 2026 production outlook for the McArthur River/Key Lake operation could be impacted.

**Profile** 

Cameco is one of the largest global providers of the uranium fuel needed to power a secure energy future. Our competitive position is based on our controlling ownership of the world's largest high-grade reserves and low-cost operations, as well as significant investments across the nuclear fuel cycle, including ownership interests in Westinghouse Electric Company and Global Laser Enrichment. Utilities around the world rely on Cameco to provide global nuclear fuel solutions for the generation of safe, reliable, carbon-free nuclear power. Our shares trade on the Toronto and New York stock exchanges. Our head office is in Saskatoon, Saskatchewan, Canada.

As used in this news release, the terms we, us, our, the Company and Cameco mean Cameco Corporation and its subsidiaries unless otherwise indicated.

- End -

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| | |
|:---|:---|
| **Investor inquiries** | **Media inquiries** |
| Cory Kos | Veronica Baker |
| 306-716-6782 | 306-385-5541 |
| **<u>cory_kos@cameco.com</u>** | **<u>veronica_baker@cameco.com</u>** |

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