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KZ

Ker Zhang

Insider · Director · AMBQ

Ker Zhang files insider transactions with the SEC as a director of Ambiq Micro. We hold 1 disclosed purchase or sale filed since 31 July 2025, 1 of them in the last 90 days.

  • Files forAMBQ
  • Disclosed buys and sells1 in all, 1 in the last 90 days
  • Last disclosure9 September 2026

Positions held

1 post we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 29 July 2025 — 4 September 2026Director · Ambiq Micro 5 Form 4 lines · source: SEC Form 4

Every transaction

5 transactions from SEC Form 4 — one row each, sort any column, open a row for the filing
5 of 5 shown
4 Sep 20269 Sep 2026SEC Form 45 dexercised options overnot a tradeAmbiq Micro1,785 sharesup +3.8%up +0.0%
4 Sep 20269 Sep 2026SEC Form 45 dsold on the open marketAmbiq Micro185 sharesup +3.8%up +0.0%
4 Sep 20269 Sep 2026SEC Form 45 dexercised options overnot a tradeAmbiq Microderivative1,785 sharesup +3.8%up +0.0%
8 Jun 202610 Jun 2026SEC Form 42 dwas grantednot a tradeAmbiq Micro4,957 sharesdown −24.7%down −20.6%
29 Jul 202531 Jul 2025SEC Form 42 dwas grantednot a tradeAmbiq Micro23,809 shares—up +36.0%

Both percentages are the stock’s move, not Ker Zhang’s return: a disclosure gives a band, never an amount, so nobody can say how much was bought or what it made. They run to the last close we hold — 9 Sep 2026, except where a name has since delisted, when the row names its own last session. We publish no close, no volume and no dollar figure behind them. 4 of the 5 rows shown carry a percentage; the rest are dashes with the reason on the row.

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.

Some filings reach us as photographs of paper rather than as a form we can read as text. Those are shown here only once they have been read and checked, so this page can hold fewer lines than the filings behind it contain. The link on every row opens the original document, which is always the full record.