Ambiq Micro (AMBQ) Director Zhang Ker Exercises Options, Sells Shares

What Happened

• Director Zhang Ker exercised stock options to acquire 1,785 shares of Ambiq Micro at an exercise price of $5.88 per share (total cost $10,496) on 2026-09-04. On the same day he sold 185 shares in an open-market transaction at $56.92 per share for proceeds of $10,530. The filing also records a derivative conversion of 1,785 shares at $0.00, reflecting the option-to-share conversion reporting entry.

Key Details

• Transaction dates and prices:
  • 2026-09-04: Exercise (M) — 1,785 shares acquired @ $5.88 (total $10,496)
  • 2026-09-04: Sale (S) — 185 shares sold @ $56.92 (proceeds $10,530)
  • 2026-09-04: Derivative conversion (M) — 1,785 shares reported disposed @ $0.00 (reporting of conversion)
• Shares owned after the transaction: Not specified in the Form 4.
• Footnote: The option vesting schedule notes 1/4 vested on Sept 8, 2017 and the remainder vested monthly thereafter (1/48 per month), subject to continued service.
• Filing timeliness: The Form 4 was filed on 2026-09-09 for a 2026-09-04 transaction (appears filed late vs. the usual 2-business-day requirement).

Context

• This was an option exercise (acquisition) paired with an open-market sale of a smaller number of shares the same day. The separate $0.00 derivative line is a reporting entry for the option conversion; it does not itself reflect cash received. The activity is factual insider trading information and should not be read as a statement of company outlook or the director’s motives.