HEIDEN WILLIAM K 4

What Happened
William K. Heiden, a director of MacroGenics (MGNX), converted/exercised 3,750 derivative shares on May 18, 2026 and, according to the filing, 3,750 of those shares were disposed at $0.00 (see note below). On May 19, 2026 he was granted two RSU awards totaling 25,750 RSUs (3,750 RSUs and 22,000 RSUs). The filing shows $0.00 per-share prices or N/A for these transactions, so no cash value is reported in the form.

Key Details

• Transaction dates: Exercise/conversion on 2026-05-18; RSU grants on 2026-05-19. Filing date: 2026-05-20 (filed within the Form 4 reporting window).
• Exercise/conversion: 3,750 derivative shares acquired (transaction code M).
• Disposition: 3,750 shares disposed at $0.00 (transaction record). This type of $0.00 disposition commonly reflects shares surrendered/withheld to satisfy tax withholding obligations related to exercise/vesting.
• Grants: 3,750 RSUs and 22,000 RSUs awarded on 5/19 (transaction code A); total new RSUs = 25,750. RSUs are a contingent right to receive one share each (see footnote).
• Vesting/vesting schedule notes: The filing notes certain RSUs vested on 5/18 (one day before the annual meeting). Other RSUs will vest one year after grant or the day prior to the next annual meeting, if earlier. An option’s vesting schedule is monthly in 1/12 increments (per footnote).
• Shares owned after the transactions: Not specified in the provided filing excerpt.

Context
This filing combines a derivative exercise/conversion event and immediate withholding-type disposition (no cash reported) with follow-on RSU awards. RSU grants are awards, not open-market purchases; they represent compensation that vests over time. The $0.00 disposition line is typically administrative (tax withholding) and does not by itself indicate a market-sale decision.