Alex Keun Mo Yang

Insider Reports History

Identity Names, identifiers, and filing context for this profile. 1 identity field
Reporting-owner location
Paramus, NJ
SEC source record Original filing metadata and source links for verification. 1 source field
Latest reporting-owner signature
/s/ Alex Keun Mo Yang
Source: Latest parsed Forms 3/4/5 signature
Source evidence Original filing metadata and source links for verification. 1 source field
Transaction source note
Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Alex Keun Mo Yang

Form 4 holding Chief Executive Officer, Director, 10%+ Owner

Polaryx Therapeutics, Inc.

Security class
Common Stock
Shares / value
24,233,249
Estimated value
$98,629,323
Report date
27 May 2026
Price
$4.07
Ownership
By Mstone Partners Healthcare Limited
Form 4 holding Chief Executive Officer, Director, 10%+ Owner

Polaryx Therapeutics, Inc.

Security class
Common Stock
Shares / value
183,560
Estimated value
$535,995
Report date
29 Jan 2026
Price
$2.92
Ownership
By MBstone Biotech Flagship Limited
Form 4 holding Chief Executive Officer, Director, 10%+ Owner

Polaryx Therapeutics, Inc.

Security class
Common Stock
Shares / value
108,282
Estimated value
$316,183
Report date
29 Jan 2026
Price
$2.92
Ownership
By Mstone Pediaorphan Singapore I Pte. Limited

Insider Reports Filed by Alex Keun Mo Yang

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