SEC Insider Transactions from Gad Thomas.

Last updated: 2026-03-14 11:08 UTC | Total transactions: 34

Gad Thomas has filed 34 insider transactions across 1 company since January 2024.

Most recent transaction: a disposition of 16000 shares of Y-mAbs Therapeutics, Inc. ($YMAB) on September 16, 2025.

Activity breakdown: 0 open-market purchases and 8 sales.

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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 Gad Thomas CHIEF BUSINESS OFFICER D Restricted Stock Units 16000 $0.00 0.0000 45,318,028 100.00% 0.04%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Common Stock 60235 $0.00 0.0000 45,318,028 100.00% 0.13%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER U Common Stock 67681 $8.60 0.0000 45,318,028 100.00% 0.15%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER U Common Stock 60000 $8.60 0.0000 45,318,028 100.00% 0.13%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 143169 $0.00 0.0000 45,318,028 100.00% 0.32%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 16000 $0.00 0.0000 45,318,028 100.00% 0.04%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 100000 $0.00 0.0000 45,318,028 100.00% 0.22%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 107500 $0.00 0.0000 45,318,028 100.00% 0.24%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 130000 $0.00 0.0000 45,318,028 100.00% 0.29%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 91450 $0.00 0.0000 45,318,028 100.00% 0.20%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 110000 $0.00 0.0000 45,318,028 100.00% 0.24%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 60000 $0.00 0.0000 45,318,028 100.00% 0.13%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 242200 $0.00 0.0000 45,318,028 100.00% 0.53%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 75000 $0.00 0.0000 45,318,028 100.00% 0.17%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 132500 $0.00 0.0000 45,318,028 100.00% 0.29%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Employee Stock Option (right to buy) 64000 $0.00 0.0000 45,318,028 100.00% 0.14%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER D Restricted Stock Units 16000 $0.00 0.0000 45,318,028 100.00% 0.04%
Sept. 16, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER U Common Stock 245486 $8.60 0.0000 45,318,028 100.00% 0.54%
June 3, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER M Employee Stock Option (right to buy) 103000 $0.00 0.0000 45,104,476 100.00% 0.23%
June 3, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER M Common Stock 103000 $2.00 433,402.0000 45,104,476 31.17% 0.23%
March 7, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 10810 $5.23 330,402.0000 44,328,962 3.17% 0.02%
Jan. 17, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER A Employee Stock Option (right to buy) 64000 $0.00 64,000.0000 44,328,962 9999.99% 0.14%
Jan. 17, 2025 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER A Common Stock 32000 $0.00 341,212.0000 44,328,962 10.35% 0.07%
Sept. 19, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER M Employee Stock Option (right to buy) 22831 $0.00 143,169.0000 44,022,356 13.75% 0.05%
Sept. 19, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER M Common Stock 22831 $4.38 309,212.0000 44,022,356 7.97% 0.05%
Sept. 16, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 30000 $12.97 286,381.0000 44,022,356 9.48% 0.07%
Sept. 13, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 65000 $13.47 316,381.0000 44,022,356 17.04% 0.15%
June 10, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 35000 $12.03 416,381.0000 43,779,456 7.75% 0.08%
June 11, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 35000 $12.00 381,381.0000 43,779,456 8.41% 0.08%
May 21, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 25000 $12.00 458,732.0000 43,779,456 5.17% 0.06%
May 23, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 7351 $13.00 451,381.0000 43,779,456 1.60% 0.02%
March 5, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER S Common Stock 3900 $16.44 483,732.0000 43,645,388 0.80% 0.01%
Jan. 18, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER A Employee Stock Option (right to buy) 132500 $0.00 132,500.0000 43,645,388 9999.99% 0.30%
Jan. 18, 2024 Y-mAbs Therapeutics, Inc. $YMAB Gad Thomas CHIEF BUSINESS OFFICER A Common Stock 22100 $0.00 487,632.0000 43,645,388 4.75% 0.05%