Timothy Chen - 27 May 2026 Form 4 Insider Report for Ambiq Micro, Inc. (AMBQ)

Reporting relationship: Director
Issuer ticker: AMBQ
Reported as of: 27 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 29 May 2026, 19:51:36 UTC
Prior SEC filing: 29 May 2026
Next SEC filing: 10 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Winzeler, Attorney-in-Fact

Key filing fact

Timothy Chen filed Form 4 for Ambiq Micro, Inc. (AMBQ) on 29 May 2026.

Key facts

This page summarizes Timothy Chen's Form 4 filing for Ambiq Micro, Inc. (AMBQ).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 29 May 2026, 19:51.

Change

Previous filing in this sequence was filed on 29 May 2026.
Current net transaction value: $0.

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 0001818099 Primary reporting owner

Chen Timothy

Relationship: Director
Address: C/O AMBIQ MICRO, INC., 6500 RIVER PLACE BLVD., BUILDING 7 SUITE, AUSTIN
Signature: /s/ Jeffrey Winzeler, Attorney-in-Fact
Signature date: 29 May 2026

Reported non-derivative transactions

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

AMBQ transaction

Common Stock

Sale

Transaction value
Shares: -22,414
Change %: -32%
Price: $78.85^*
Shares after: 48,178
Date: 27 May 2026
Ownership: By: Triumph Way Investment Inc.
Footnotes: F1, F2

AMBQ transaction

Common Stock

Sale

Transaction value
Shares: -24,248
Change %: -50%
Price: $79.72^*
Shares after: 23,930
Date: 27 May 2026
Ownership: By: Triumph Way Investment Inc.
Footnotes: F2, F3

AMBQ transaction

Common Stock

Sale

Transaction value
Shares: -20,666
Change %: -86%
Price: $80.61^*
Shares after: 3,264
Date: 27 May 2026
Ownership: By: Triumph Way Investment Inc.
Footnotes: F2, F4

AMBQ transaction

Common Stock

Sale

Transaction value
Shares: -3,264
Change %: -100%
Price: $81.57^*
Shares after: 0
Date: 27 May 2026
Ownership: By: Triumph Way Investment Inc.
Footnotes: F2, F5

AMBQ holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 47,618
Date: 27 May 2026
Ownership: Direct

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 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 $78.29 to $79.26 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.

Footnote F2

The Reporting Person exercises sole voting and dispositive control over the shares held by Triumph Way Investment Inc.

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 $79.30 to $80.28 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 $80.30 to $81.27 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 F5

The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $81.325 to $81.755 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.