Quantum Biopharma Ltd.
QNTM- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001771885
No open-market purchases or sales by Quantum Biopharma Ltd. insiders were filed in the last 90 days; 26 institutions reported holding it in 13F filings for Q2 2026, worth $1.50M in total; no superinvestor holds it.
Holders of 5% or more of QNTM
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Quantum Biopharma Ltd., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Malone Wealth Ventures LLC | 13G/A | 9.80%375.8K shares | −17.60 ppfrom 27.40% | Jun 11, 202512 filings | Feb 3, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
12 Schedule 13D and 13G filings on Quantum Biopharma Ltd., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Feb 3, 20269:19 AM ET | Malone Wealth Ventures LLC | 13G/A | 9.80%375.8K shares | −17.60 ppfrom 27.40% | Feb 3, 2026 | SEC |
| Sep 4, 20257:36 PM ET | Malone Wealth Ventures LLC | 13G/A | 27.40%1.05M shares | +5.60 ppfrom 21.80% | Jun 11, 2025 | SEC |
| Jul 18, 20252:44 PM ET | Malone Wealth Ventures LLC | 13G/A | 21.80%829.7K shares | +2.40 ppfrom 19.40% | Jul 18, 2025 | SEC |
| Jul 10, 20257:50 PM ET | Malone Wealth Ventures LLC | 13G/A | 19.40%735.1K shares | −0.50 ppfrom 19.90% | Jul 10, 2025 | SEC |
| Jul 10, 20257:44 PM ET | Malone Wealth Ventures LLC | 13G/A | 19.90%689.4K shares | 0.00 ppfrom 19.90% | Jul 10, 2025 | SEC |
| Jul 10, 20257:39 PM ET | Malone Wealth Ventures LLC | 13G/A | 19.90%689.4K shares | 0.00 ppfrom 19.90% | Jul 10, 2025 | SEC |
| Jun 30, 202510:26 AM ET | Malone Wealth Ventures LLC | 13G/A | 19.90%689.4K shares | +2.10 ppfrom 17.80% | Jun 11, 2025 | SEC |
| Jun 23, 20253:34 PM ET | Malone Wealth Ventures LLC | 13D/A | 17.80%610.4K shares | +0.80 ppfrom 17.00% | Jun 12, 2025 | SEC |
| Jun 23, 202511:29 AM ET | Malone Wealth Ventures LLC | 13D/A | 17.00%580.8K shares | +2.20 ppfrom 14.80% | Jun 12, 2025 | SEC |
| Jun 16, 20259:53 PM ET | Malone Wealth Ventures LLC | 13D/A | 14.80%505.2K shares | +0.20 ppfrom 14.60% | Jun 12, 2025 | SEC |
| Jun 12, 20256:15 PM ET | Malone Wealth Ventures LLC | 13D | 14.60%496.1K shares | +1.40 ppfrom 13.20% | Jun 12, 2025 | SEC |
| Jun 11, 20253:26 PM ET | Malone Wealth Ventures LLC | 13G | 13.20%447.8K shares | New | Jun 11, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Quantum Biopharma Ltd. shares.
No Form 144 notices for Quantum Biopharma Ltd. are on file.