Amphastar (AMPH) Senior EVP Zhou Rong Exercises Options, Sells Shares

What Happened
Zhou Rong, Senior EVP of Amphastar Pharmaceuticals (AMPH), exercised 10,000 stock options on Sept. 16, 2026 at $13.35 per share (total cost $133,500) and sold 10,000 shares in an open-market transaction the same day for a weighted-average price of $23.94 (total proceeds ~$239,404). The filing also reports a 10,000-share derivative disposition at $0 (see footnotes for record-holder details).

Key Details

• Transaction date: 2026-09-16 (Form 4 filed 2026-09-17). Filing appears timely.
• Option exercise: 10,000 shares acquired at $13.35 each (total $133,500).
• Open-market sale: 10,000 shares sold at a weighted-average price of $23.94; proceeds reported $239,404. Sale prices ranged $23.83–$24.05 (footnote F1).
• Derivative disposition: 10,000 shares reported disposed at $0 (reported as a derivative transaction).
• Vesting/status: Shares subject to the option were fully vested and immediately exercisable (F4).
• Record holdings: Some shares are held of record by the Zhou Family Trust (reporting person is trustee) and some by the reporting person’s spouse (F2, F3).
• Shares owned after the transaction: Not specified in the provided excerpt.

Context

• This was an exercise of vested options followed by same-day sale of shares — a common "cashless" outcome where exercised shares are sold to cover cost/taxes or to realize gains. The open-market sale produced net proceeds exceeding the exercise cost.
• Footnote F1 indicates the sale price is a weighted average from multiple trades; the filer can provide per-trade details on request. This filing is factual and does not state the insider’s motivation.