13F

Stock

Aptorum Group Limited

Ticker not mapped · held by 8 managers

Reported value

$124.6K

Holders

8

+3 new · −2 exited

Holders’ est. mark

−$29.8K

Price effect on 5 books still in the name

Largest holder

$73.6K

Citadel

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Citadel92.4K$73.6K−$24.4KCut−$49K
SUSQUEHANNA INTERNATIONAL GROUP, LLP16.8K$13.4K—New
XTX Topco Ltd15.1K$12K—New
MORGAN STANLEY13.3K$10.6K−$3.5KCut−$3.54K
Renaissance Technologies11.8K$9.42K—New
OSAIC HOLDINGS, INC.5.5K$4.4K−$1.43KCut−$1.43K
UBS Group AG1.63K$1.3K−$430Cut−$1.08K
SBI Securities Co., Ltd.7$6−$1Cut−$1

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.