Ambiq Micro (AMBQ) Director Zhang Ker Sells 10,000 Shares

What Happened

• Director Zhang Ker sold a total of 10,000 Ambiq Micro (AMBQ) shares in open-market transactions on September 11, 2026. The filing reports 9,100 shares sold at a weighted average price of $63.39 (proceeds $576,809) and 900 shares sold at a weighted average price of $63.95 (proceeds $57,552), for combined proceeds of approximately $634,361. These were sales (not purchases).

Key Details

• Transaction date: 2026-09-11; Form 4 filed: 2026-09-15 (filed one business day after the typical 2-business-day window).
• Reported prices and ranges:
  • 9,100 shares reported at $63.39 (weighted average); actual trade prices ranged $62.85–$63.84 (see footnote F1).
  • 900 shares reported at $63.95 (weighted average); actual trade prices ranged $63.87–$64.05 (see footnote F2).
• Shares owned after the transaction: not disclosed in the provided filing excerpt.
• No 10b5-1 plan, option exercise, gift, or tax-withholding noted in this filing excerpt.
• Footnotes state the reporting person will provide a breakdown of the number of shares sold at each separate price within the stated ranges upon request.

Context

• This filing documents open-market sales by a company director. Sales are common and do not by themselves indicate management sentiment about the company’s future; purchases are generally regarded as more informative. The filing appears to have been submitted one business day later than the typical two-business-day reporting requirement.