Ker Zhang - 11 Sep 2026 Form 4 Insider Report for Ambiq Micro, Inc. (AMBQ)

Reporting relationship: Director
Issuer ticker: AMBQ
Reported as of: 11 Sep 2026
Net transaction value: -$634,361
SEC form: 4
Accepted by SEC: 15 Sep 2026, 18:58:28 UTC
Prior SEC filing: 09 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Winzeler, Attorney-in-Fact

Filing notes and source

Key filing fact

Ker Zhang filed Form 4 for Ambiq Micro, Inc. (AMBQ) on 15 Sep 2026.

Key facts

This page summarizes Ker Zhang's Form 4 filing for Ambiq Micro, Inc. (AMBQ).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 15 Sep 2026, 18:58.

Change

Previous filing in this sequence was filed on 09 Sep 2026.
Current net transaction value: -$634,361.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001266870 Primary reporting owner

ZHANG KER

Relationship: Director
Address: C/O AMBIQ MICRO, INC., 6500 RIVER PLACE BLVD., BLDG 7 SUITE 200, AUSTIN
Signature: /s/ Jeffrey Winzeler, Attorney-in-Fact
Signature date: 15 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMBQ transaction

Common Stock

Sale

Transaction value: $576,809
Shares: -9,100
Change %: -30%
Price: $63.39
Shares after: 21,266
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1

AMBQ transaction

Common Stock

Sale

Transaction value: $57,552
Shares: -900
Change %: -4.2%
Price: $63.95
Shares after: 20,366
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $62.85 to $63.84 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F2

The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $63.87 to $64.05 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.