Wilms Joris has filed 18 insider transactions across 1 company since January 2024.
Most recent transaction: a disposition of 42900 shares of Y-mAbs Therapeutics, Inc. ($YMAB) on September 16, 2025.
Activity breakdown: 0 open-market purchases and 1 sale.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 42900 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.09% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 32000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.07% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 20000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.04% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 35700 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.08% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 32000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.07% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 35700 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.08% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | U | Common Stock | 12799 | $8.60 | 0.0000 | 45,318,028 | 100.00% | 0.03% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Common Stock | 39301 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.09% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 20000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.04% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 20000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.04% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 20000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.04% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 20000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.04% |
| Sept. 16, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | D | Employee Stock Option (right to buy) | 20000 | $0.00 | 0.0000 | 45,318,028 | 100.00% | 0.04% |
| Jan. 17, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | A | Employee Stock Option (right to buy) | 42900 | $0.00 | 42,900.0000 | 44,328,962 | 9999.99% | 0.10% |
| Jan. 17, 2025 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | A | Common Stock | 21500 | $0.00 | 52,100.0000 | 44,328,962 | 70.26% | 0.05% |
| Aug. 26, 2024 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | S | Common Stock | 5000 | $14.69 | 30,600.0000 | 44,022,356 | 14.04% | 0.01% |
| Jan. 18, 2024 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | A | Common Stock | 17800 | $0.00 | 35,600.0000 | 43,645,388 | 100.00% | 0.04% |
| Jan. 18, 2024 | Y-mAbs Therapeutics, Inc. | $YMAB | Wilms Joris | SVP & CHIEF OPERATING OFFICER | A | Employee Stock Option (right to buy) | 35700 | $0.00 | 35,700.0000 | 43,645,388 | 9999.99% | 0.08% |