Denison Mines Corp. SEC filings DNN
Denison Mines Corp. has 675 filings in SEC EDGAR's recent list, going back to Jun 11, 1998. Its latest annual report, Form 40-F, was filed on Mar 30, 2026 for the period ended Dec 31, 2025. The most recent current report (Form 6-K) was filed on Aug 14, 2026. The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 7, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 13, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Mar 31, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Jan 24, 2018 | — |
| SC 13G | Ownership over 5% (passive) | Jan 23, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Feb 4, 2016 | — |
| SC 13G | Ownership over 5% (passive) | Jan 16, 2015 | — |
| SC 13G | Ownership over 5% (passive) | Jan 17, 2014 | — |
| SC 13D/A | Amended ownership over 5% (active) | Aug 5, 2010 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 6, 2009 | — |
| SC 13D | Ownership over 5% (active) | May 9, 2008 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 30, 2008 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 9, 2007 | — |
| SC 13G | Ownership over 5% (passive) | Sep 1, 2006 | — |
Showing 25 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Miscellaneous Metal Ores (SIC 1090)
- Listed as
- DNN (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- Ontario, Canada
- Headquarters
- Toronto
- SEC filer status
- Non-accelerated filer
- SEC CIK
- 1063259
- Former names
- INTERNATIONAL URANIUM CORP (until Dec 8, 2006)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.