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APM · NASDAQ · Biotechnology

Aptorum Group (APM)

Developing oncology, infectious disease, and diagnostic assets for unmet medical needs.

$8.26

At close−1.44 (−14.84%)

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Breakdown13F · 13D/G · Form 4

101.8K ADS (1 ADS = 8 ordinary shares) as of Sep 3, 2026 · holders as of their latest filing

Two share counts disagree (101.8K in the company's Sep 3, 2026 report, 634.7K elsewhere); stakes use the report.

This company has 2 share classes; every stake here is a share of the whole company.

Top shareholders13F · 13D/G · Form 4

Holder	Stake	Shares	Evidence
CGY Investments Limited (“CGYStrategic	—17.59% of class, as filed	—	13Dfiled Jul 11, 2019 ↗
Hudson Bay Capital Management LPInstitution	—6.54% of class, as filed	—	13Gfiled Feb 7, 2022 ↗
Kira S. SheinermanInsider	—51.56% of class, as filed	—	13Dfiled Jul 24, 2026 ↗
s: CGY Investments Limited (“CGY Investments”)Strategic	—17.59% of class, as filed	—	13Dfiled May 8, 2019 ↗
s: Ian Huen (“Ian”)Insider	—69.25% of class, as filed	—	13D/Afiled Jun 1, 2021 ↗

13D/13G — an ownership statement filed at 5% or more

Institutions13F

No 13F holders on record.

Ownership statements13D/G · 5% or more, as filed

Holder	% of class	Shares	Form	Filed
Kira S. Sheinerman	51.56%	1.52M	13D	Jul 24, 2026 ↗

Aptorum Group (APM)

Breakdown13F · 13D/G · Form 4

Top shareholders13F · 13D/G · Form 4

Institutions13F

Ownership statements13D/G · 5% or more, as filed

Insider tradesForm 4

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