Horich William Todd 4

What Happened
William Todd Horich, SVP, Commercial Operations at Supernus Pharmaceuticals (SUPN), converted/vested Performance Share Units (PSUs) on March 6, 2026 (7,500 shares total, acquired at $0). The company withheld 3,455 of those shares to satisfy tax-withholding obligations (value reported $189,092). In separate open-market transactions on March 9 and March 10 he sold a total of 8,877 shares for approximately $483,797 (4,438 shares @ $54.00 = $239,652; 4,439 shares @ $55.00 = $244,145). These actions are primarily sales and tax-withholding related rather than purchases.

Key Details

• Transaction dates and prices:
  • 2026-03-06: Conversion/vesting of PSUs — 2,625; 3,750; 1,125 (total 7,500) at $0 (derivative conversion).
  • 2026-03-06: Company withheld shares for tax: 1,216 @ $54.73 ($66,552); 1,718 @ $54.73 ($94,026); 521 @ $54.73 ($28,514) — total ~$189,092.
  • 2026-03-09: Open-market sale — 4,438 shares @ $54.00 = $239,652.
  • 2026-03-10: Open-market sale — 4,439 shares @ $55.00 = $244,145.
• Total open-market sale proceeds: ~$483,797.
• Shares acquired via conversion: 7,500 PSUs vested/converted on 3/6/2026.
• Shares withheld for taxes: 3,455 (F1 — company withheld shares to satisfy tax withholding).
• Footnotes: F2 notes the PSUs were awarded Feb 22, 2024 and vested upon achievement of individual performance objectives established June 24, 2024.
• Shares owned after the transactions: not specified in this filing.
• Filing timeliness: Report filed 2026-03-10 for transactions on 2026-03-06 — filing appears timely.

Context
These entries reflect a derivative conversion/vesting event (PSUs converting to common stock) with company share withholding to cover taxes and subsequent open-market sales. Withholding of shares to satisfy taxes is a common net-settlement approach and the open-market sales indicate disposal of shares rather than a new purchase. The filing is factual and does not state Horich’s post-transaction holdings or motive.