Ker Zhang - 04 Sep 2026 Form 4 Insider Report for Ambiq Micro, Inc. (AMBQ)

Reporting relationship: Director
Issuer ticker: AMBQ
Reported as of: 04 Sep 2026
Net transaction value: -$10,530
SEC form: 4
Accepted by SEC: 09 Sep 2026, 17:08:21 UTC
Prior SEC filing: 10 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Paula Floyd, Attorney-in-Fact

Key filing fact

Ker Zhang filed Form 4 for Ambiq Micro, Inc. (AMBQ) on 09 Sep 2026.

Key facts

This page summarizes Ker Zhang's Form 4 filing for Ambiq Micro, Inc. (AMBQ).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 09 Sep 2026, 17:08.

Change

Previous filing in this sequence was filed on 10 Jun 2026.
Current net transaction value: -$10,530.

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/ Paula Floyd, Attorney-in-Fact
Signature date: 09 Sep 2026

Reported non-derivative transactions

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

AMBQ transaction

Common Stock

Options Exercise

Transaction value
Shares: +1,785
Change %: +6.2%
Price: $5.88^*
Shares after: 30,551
Date: 04 Sep 2026
Ownership: Direct

AMBQ transaction

Common Stock

Sale

Transaction value: $10,530
Shares: -185
Change %: -0.61%
Price: $56.92
Shares after: 30,366
Date: 04 Sep 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AMBQ transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -1,785
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 04 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,785
Exercise price: $5.88
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote 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 continued service.