11 insiders reported 36 Form 4 transactions for Y-mAbs Therapeutics, Inc. (YMAB) over the past 18 months (most recent 2025-09-19). Recent activity: Hamill Laura (Director) Sell 5,825 shares, Hamill Laura (Director) Sell 25,080 shares, Wilms Joris (SVP & CHIEF OPERATING OFFICER) Sell 39,301 shares, GILL DAVID N (Director) Sell 25,080 shares, Rossi Michael J (PRESIDENT & CEO) Sell 7,982 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-09-19 | Hamill Laura | Director | Sell | 5,825 | $50,095 |
| 2025-09-19 | Hamill Laura | Director | Sell | 25,080 | $0 |
| 2025-09-18 | Wilms Joris | SVP & CHIEF OPERATING OFFICER | Sell | 39,301 | $0 |
| 2025-09-18 | GILL DAVID N | Director | Sell | 25,080 | $0 |
| 2025-09-18 | Rossi Michael J | PRESIDENT & CEO | Sell | 7,982 | $68,645 |
| 2025-09-18 | Rossi Michael J | PRESIDENT & CEO | Sell | 129,101 | $0 |
| 2025-09-18 | Wedell-Wedellsborg Johan | Director | Sell | 5,825 | $50,095 |
| 2025-09-18 | Wedell-Wedellsborg Johan | Director | Sell | 25,080 | $0 |
| 2025-09-18 | Wedell-Wedellsborg Johan | Director | Sell | 4.6M | $39.2M |
| 2025-09-18 | LaRocca John | SVP, General Counsel & Secry | Sell | 21,500 | $0 |
| 2025-09-18 | WG Biotech ApS | Director | Sell | 4.6M | $39.2M |
| 2025-09-18 | Wilms Joris | SVP & CHIEF OPERATING OFFICER | Sell | 12,799 | $110,071 |
| 2025-09-18 | GILL DAVID N | Director | Sell | 5,825 | $50,095 |
| 2025-09-18 | PFREUNDSCHUH PETER P. | EVP, CFO and Treasurer | Sell | 77,800 | $0 |
| 2025-09-18 | Gad Thomas | CHIEF BUSINESS OFFICER | Sell | 245,486 | $2.1M |
| 2025-09-18 | Gad Thomas | CHIEF BUSINESS OFFICER | Sell | 60,235 | $0 |
| 2025-09-18 | Gad Thomas | CHIEF BUSINESS OFFICER | Sell | 67,681 | $582,057 |
| 2025-09-18 | Gad Thomas | CHIEF BUSINESS OFFICER | Sell | 60,000 | $516,000 |
| 2025-09-18 | TYAGI ASHU | Director | Sell | 5,825 | $50,095 |
| 2025-09-18 | TYAGI ASHU | Director | Sell | 25,080 | $0 |
| 2025-09-18 | HEALY JAMES | Director | Sell | 31,603 | $271,786 |
| 2025-09-18 | HEALY JAMES | Director | Sell | 25,080 | $0 |
| 2025-09-18 | HEALY JAMES | Director | Sell | 2.2M | $18.9M |
| 2025-07-02 | GILL DAVID N | Director | Buy | 25,080 | $0 |
| 2025-07-02 | HEALY JAMES | Director | Buy | 25,080 | $0 |
Source: SEC Form 4 filings · as of 2025-09-19
