Rossi Michael J - Insider Non-Derivative Transactions at Y-mAbs Therapeutics, Inc. (YMAB) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Sep 16, 2025, Rossi Michael J's relationship to Y-mAbs Therapeutics, Inc. (YMAB) is Director,Officer (PRESIDENT & CEO), and currently has 0 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other YMAB insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Rossi Michael J - Insider Non-Derivative Transactions of YMAB Common Stock

Rossi Michael J - Insider Non-Derivative Transactions at YMAB

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Sep 17, 2025	Disposition -- (Common Stock)	129101	0	0
Sep 17, 2025	U -- (Common Stock)	7982	8.6	0
Mar 8, 2025	Sell -- (Common Stock)	3917	5.2	137083
Jan 18, 2025	Acquisition -- (Common Stock)	105300	0	141000
Feb 13, 2024	Acquisition -- (Common Stock)	35700	0	35700