Stock

Quantum Biopharma Ltd.

QNTM · held by 26 managers

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025

Reported value

$1.17M

Holders

+7 new · −5 exited

Holders’ est. mark

−$171K

Price effect on 18 books still in the name

Largest holder

$524.5K

AdvisorShares Investments LLC

Notable conviction

Share of each notable manager’s 13F book.

Citadel0.0% · $76.6K

Holder count by quarter

Q3 2025 Q4 2025 Q1 2026

Who holds it

Notable only

Investor	Shares	Value	Est. mark	Change
AdvisorShares Investments LLC	155.2K	$524.5K	−$37.1K	Added$162.2K
Platform Technology Partners	41.1K	$198.6K	—	New
JANE STREET GROUP, LLC	31.5K	$152.1K	−$26.9K	Added$72.6K
Citadel	15.9K	$76.6K	−$39.2K	Cut−$39.2K
Marex Group plc	13.5K	$65K	−$33.2K	Cut−$33K
Mariner, LLC	10.1K	$48.6K	—	New
UBS Group AG	7.24K	$35K	−$4.22K	Added$22.5K
OSAIC HOLDINGS, INC.	6.38K	$30.8K	−$13K	Cut−$7.68K
Steward Partners Investment Advisory, LLC	4.38K	$21.2K	−$10.8K	Cut−$10.8K
Atlantic Union Bankshares Corp	1K	$4.83K	−$2.47K	Cut−$2.47K
Farther Finance Advisors, LLC	1K	$4.41K	−$2.89K	Cut−$2.89K
JONES FINANCIAL COMPANIES LLLP	700	$3.34K	—	New
Cetera Trust Company, N.A	250	$1.21K	−$617	Cut−$617
WELLS FARGO & COMPANY/MN	100	$477	—	New
Federation des caisses Desjardins du Quebec	93	$369	−$288	Cut−$288
SBI Securities Co., Ltd.	75	$362	−$137	Cut−$40
Tower Research Capital LLC (TRC)	71	$343	—	New
GROUP ONE TRADING LLC	34	$164	−$84	Cut−$84
Rockefeller Capital Management L.P.	30	$145	−$74	Cut−$74
NATIONAL BANK OF CANADA /FI/	20	$93	—	New
TD Waterhouse Canada Inc.	20	$88	—	New
Activest Wealth Management	15	$72	−$38	Cut−$38
Virtu Financial LLC	12.3K	$59	−$26	Cut−$17
Purpose Unlimited Inc.	1	$4	−$3	Cut−$3
ROYAL BANK OF CANADA	19	$0	$0	Held

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.