Transaction · 0001266870-26-000004

Zhang Ker

ZHANG KER, DIR, reported an open-market or private sale at Ambiq Micro, Inc. involving 185.000000 shares for an estimated $10530.20. Reported holdings after the transaction were 30366.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SDIR
AMBQAmbiq Micro, Inc.
Trade date
Sep 04, 2026
Filing date
Sep 09, 2026
View on SEC Insider profile
Estimated value-$10.5kShares × reported price
Shares traded185$56.92 per share
Holdings after30.3kDirect
% of reported position traded0.61%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 30,551 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

AMBQ price since this filing

Daily closing prices, with the filing date and available return windows
AMBQ · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -1.2%1w ago -10.1%1d ago -11.5%
Returns since7d -6.1%30d -8.2%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001266870-26-000004
Common Stock
Transaction date
Sep 04, 2026
Filed Sep 09, 2026, 09:08 PM · 5d delay
Shares
185 sh
$56.92 per share
Estimated value
-$10.5k
Computed from shares × price
Holdings after
30,366 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership
Filing-only score

+6 points

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    1/4 of the shares subject to the option vested on September 8, 2017, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's con…

Original filing · 0001266870-26-000004
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