Quantum Biopharma Ltd. SEC filings QNTM
Quantum Biopharma Ltd. has 357 filings in SEC EDGAR's recent list, going back to Oct 15, 2019. Its latest annual report, Form 20-F, was filed on Mar 26, 2026 for the period ended Dec 31, 2025. The most recent current report (Form 6-K) was filed on Nov 5, 2026. The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 5, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 8, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 3, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Sep 4, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 18, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 10, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 10, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 10, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 30, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jun 23, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jun 23, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jun 16, 2025 | — |
| SCHEDULE 13D | Ownership over 5% (active) | Jun 12, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 11, 2025 | — |
| SC 13D/A | Amended ownership over 5% (active) | Apr 11, 2022 | — |
| SC 13D | Ownership over 5% (active) | Apr 1, 2021 | — |
| SC 13D/A | Amended ownership over 5% (active) | Feb 22, 2021 | — |
| SC 13D | Ownership over 5% (active) | Sep 8, 2020 | — |
Showing 18 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
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- QNTM (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- Ontario, Canada
- Headquarters
- Toronto
- SEC filer status
- Non-accelerated filer, Emerging growth company
- SEC CIK
- 1771885
- Former names
- FSD Pharma Inc. (until Aug 15, 2024)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.