As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 3/12/20  Y-mAbs Therapeutics, Inc.         10-K       12/31/19   81:7.8M                                   Toppan Merrill Bridge/FA 
12/31/19  WG Biotech ApS                    4          10% Owner²  1:4K   Y-mAbs Therapeutics, Inc.         Toppan Merrill/FA        
12/31/19  Gad Thomas                        4          Dir.,Off.²  1:6K   Y-mAbs Therapeutics, Inc.         Toppan Merrill/FA        
12/31/19  Wedell-Wedellsborg Johan          4          Director²   1:6K   Y-mAbs Therapeutics, Inc.         Toppan Merrill/FA        

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¹	Filing/Form Types:
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	10-K	Annual Report — Form 10-K.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.