Liawatidewi Yakob 4

What Happened Liawatidewi Yakob, EVP Corporate Administration Center and a director of Amphastar Pharmaceuticals (AMPH), had 1,144 restricted stock units (RSU) shares withheld to satisfy tax obligations upon vesting. The withholding was recorded at $19.34 per share, resulting in a disposition value of approximately $22,125. This was a tax-withholding disposition (routine) rather than an open-market sale.

Key Details

• Transaction date: 2026-03-06; Form 4 filed: 2026-03-10 (filed within the 2-business-day deadline).
• Shares withheld/disposed: 1,144 at $19.34 per share; total value ≈ $22,125.
• Shares owned after transaction: Not specified in the filing; reported shares are held of record by the Yakob and Sunmoon Trust dated July 25, 2013 (see footnote).
• Footnotes: F1 = shares were withheld to satisfy tax liability on RSU vesting; F2 = reported shares are held of record by the Yakob and Sunmoon Trust (reporting person is trustee).
• Transaction code: F (payment of exercise price or tax liability) — treated as tax withholding, not a timed buy/sell decision.

Context This filing reflects a routine tax-withholding action tied to RSU vesting and does not necessarily indicate a change in insider sentiment. Because shares were withheld to cover taxes (rather than sold on the open market), the transaction is administrative in nature.