Liawatidewi Yakob 4

What Happened

• Liawatidewi Yakob, EVP Corporate Administration Center and a director of Amphastar Pharmaceuticals (AMPH), had 1,033 shares withheld on March 15, 2026 to satisfy tax withholding related to the vesting of restricted stock units (RSUs). The shares were reported at $18.18 each for a total value of $18,780. This was a tax-withholding event (code F), not an open-market sale.

Key Details

• Transaction date and price: 2026-03-15; 1,033 shares at $18.18 per share; total reported value $18,780.
• Transaction type/code: F — shares withheld to cover tax liability on RSU vesting.
• Shares owned after transaction: not specified in the provided filing.
• Footnotes: F1 confirms shares were withheld to satisfy tax liability on RSU vesting; F2 notes the reported shares are held of record by the Yakob and Sunmoon Trust (dated July 25, 2013), for which Yakob is a trustee.
• Filing timeliness: Form 4 was filed 2026-03-17 for a 2026-03-15 transaction (appears timely under the two-business-day rule).

Context

• This was a routine cashless tax-withholding action tied to RSU vesting, which reduces the net shares delivered to the insider rather than indicating a discretionary sale. Such withholdings are common and generally not viewed as a directional signal about the insider's view of the company.