Comparable stake leader
Malone Wealth Ventures LLC
SEC ownership of Quantum Biopharma Ltd.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001771885.
Disclosed value leader
Malone Wealth Ventures LLC
Comparable rows
25/25
Latest evidence
31 Mar 2026
- Public ticker
- QNTM on Nasdaq
- Parsed ownership sources
-
13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Malone Wealth Ventures LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
25 of 25
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Malone Wealth Ventures LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001771885
- Issuer location
- Toronto
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Quantum Biopharma Ltd. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Malone Wealth Ventures LLC
Disclosed value leader
Malone Wealth Ventures LLC
Comparable rows
25/25
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 9.8%
13D/G row: Malone Wealth Ventures LLC
Showing 1-8 of 25 holder rows.
Quick read
Malone Wealth Ventures LLC leads the comparable SEC ownership view at 9.8%.
25 of 25 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Malone Wealth Ventures LLC's linked filing trail.
Comparable ownership
Top 5
Malone Wealth Ventures LLC
9.8%
AdvisorShares Investments LLC
2.8%
Platform Technology Partners
1.1%
JANE STREET GROUP, LLC
0.82%
CITADEL ADVISORS LLC
0.41%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 25 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Malone Wealth Ventures LLC |
13D/G
|
9.8%
|
$2,754,262
375,752 shares
|
-$3,327,659 | 03 Feb 2026 |
| AdvisorShares Investments LLC |
13F
Company
|
2.8%
|
$524,495
108,591 shares
|
— | 31 Mar 2026 |
| Platform Technology Partners |
13F
Company
|
1.1%
|
$198,590
41,116 shares
|
— | 31 Mar 2026 |
| JANE STREET GROUP, LLC |
13F
Company
|
0.82%
|
$152,149
31,501 shares
|
— | 31 Mar 2026 |
| CITADEL ADVISORS LLC |
13F
Company
|
0.41%
|
$76,618
15,863 shares
|
— | 31 Mar 2026 |
| Marex Group plc |
13F
Company
|
0.35%
|
$65,050
13,468 shares
|
— | 31 Mar 2026 |
| Virtu Financial LLC |
13F
Company
|
0.32%
|
$59,000
12,282 shares
|
— | 31 Mar 2026 |
| Mariner, LLC |
13F
Company
|
0.26%
|
$48,553
10,059 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 24 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Recent insider transactions for Quantum Biopharma Ltd.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.