Jeffrey G. Winzeler - 02 Oct 2026 Form 4 Insider Report for Ambiq Micro, Inc. (AMBQ)

Reporting relationship: Chief Financial Officer
Issuer ticker: AMBQ
Reported as of: 02 Oct 2026
Net transaction value: -$379,645
SEC form: 4
Accepted by SEC: 06 Oct 2026, 20:16:09 UTC
Prior SEC filing: 04 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Winzeler

Filing notes and source

Key filing fact

Jeffrey G. Winzeler filed Form 4 for Ambiq Micro, Inc. (AMBQ) on 06 Oct 2026.

Key facts

This page summarizes Jeffrey G. Winzeler's Form 4 filing for Ambiq Micro, Inc. (AMBQ).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 06 Oct 2026, 20:16.

Change

Previous filing in this sequence was filed on 04 Jun 2026.
Current net transaction value: -$379,645.

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 0001312143 Primary reporting owner

Winzeler Jeffrey G

Relationship: Chief Financial Officer
Address: C/O AMBIQ MICRO, INC., 6500 RIVER PLACE BLVD BUILDING 7 STE 200, AUSTIN
Signature: /s/ Jeffrey Winzeler
Signature date: 06 Oct 2026

Reported non-derivative transactions

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

AMBQ transaction

Common Stock

Sale

Transaction value: -$161,921
Shares: -2,343
Change %: -2.2%
Price: $69.11
Shares after: 103,956
Date: 02 Oct 2026
Ownership: Direct
Footnotes: F1, F2

AMBQ transaction

Common Stock

Sale

Transaction value: -$197,316
Shares: -2,828
Change %: -2.7%
Price: $69.77
Shares after: 101,128
Date: 02 Oct 2026
Ownership: Direct
Footnotes: F1, F3

AMBQ transaction

Common Stock

Sale

Transaction value: -$20,408
Shares: -284
Change %: -0.28%
Price: $71.86
Shares after: 100,844
Date: 02 Oct 2026
Ownership: Direct
Footnotes: F1, F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

This sale reported on this Form 4 was effected pursuant to the Issuer's policy requiring sell-to-cover to satisfy certain tax obligations of the Reporting Person incurred with the vesting and settlement of certain restricted stock units.

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 $68.41 to $69.40 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 F3

The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $69.41 to $70.16 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 F4

The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $71.50 to $72.26 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.