Ambiq director plans $634K sale of 10,000 shares

Director Ker Zhang has filed a Rule 144 notice to sell 10,000 AMBQ common shares acquired through restricted stock vesting.

Rhea-AI Filing Summary

Ambiq Micro, Inc. (AMBQ) has a notice under Rule 144 reporting that director Ker Zhang plans to sell 10,000 shares of common stock, with an aggregate market value of $634,361.00, through Morgan Stanley Smith Barney, with an approximate sale date of September 11, 2026. The notice lists prior acquisitions of these shares through restricted stock vesting under a registered plan in 2025 and 2026, and discloses a recent sale of 185 shares for $10,530.20 during the past three months.

Key Figures

Shares to be sold: 10,000 shares Aggregate market value of planned sale: $634,361.00 Shares outstanding: 24,185,000 shares +5 more

8 metrics

Shares to be sold 10,000 shares Common stock covered by the Rule 144 notice for planned sale

Aggregate market value of planned sale $634,361.00 Reported value of the 10,000 common shares to be sold

Shares outstanding 24,185,000 shares Ambiq Micro, Inc. common shares outstanding as listed in the notice

Recent sale amount 185 shares Common shares sold on September 4, 2026 during the past three months

Recent sale proceeds $10,530.20 Total proceeds from the 185 shares sold on September 4, 2026

Restricted stock vesting December 1, 2025 5,952 shares Common stock acquired via restricted stock vesting under a registered plan

Restricted stock vesting March 1, 2026 1,072 shares Common stock acquired via restricted stock vesting under a registered plan

Restricted stock vesting June 1, 2026 and September 1, 2026 1,488 shares each date Common stock acquired via restricted stock vesting under a registered plan for services rendered

Key Terms

Rule 144, restricted stock, registered plan, services rendered

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock financial

"Restricted Stock Vesting Under a Registered Plan"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

registered plan financial

"Restricted Stock Vesting Under a Registered Plan"

A registered plan is a savings or investment account that a government recognizes for special tax treatment and rules, such as limits on how much you can put in and conditions for withdrawals. For investors it matters because those rules change how much of your gains are taxed, how quickly your money can be accessed and what strategies make sense — like a labeled jar that gives tax breaks but comes with rules about when and how you can take the money out.

services rendered financial

"5952 | 12/01/2025 | Services Rendered"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for AMBQ (Ambiq Micro, Inc.)?

The filing discloses that director Ker Zhang intends to sell 10,000 shares of Ambiq Micro, Inc. common stock under Rule 144, with an aggregate market value of $634,361.00, through Morgan Stanley Smith Barney around September 11, 2026.

How many AMBQ shares are covered by this Rule 144 notice?

The notice covers a proposed sale of 10,000 shares of AMBQ common stock, with an aggregate market value reported as $634,361.00. These are to be sold through Morgan Stanley Smith Barney on or about September 11, 2026.

How were the AMBQ shares being sold by Ker Zhang acquired?

The shares were acquired through restricted stock vesting under a registered plan on multiple dates, including December 1, 2025 (5,952 shares), March 1, 2026 (1,072 shares), June 1, 2026 (1,488 shares), and September 1, 2026 (1,488 shares), as consideration for services rendered.

How many AMBQ shares are outstanding according to the Form 144?

The filing lists 24,185,000 shares of Ambiq Micro, Inc. common stock outstanding as of the date referenced alongside the planned sale of 10,000 shares, providing context for the size of the proposed sale.

What AMBQ share sales has Ker Zhang made in the past three months?

The notice reports that 185 shares of AMBQ common stock were sold by Ker Zhang on September 4, 2026 for total proceeds of $10,530.20, disclosed under the section for securities sold during the past three months.

Who is the broker handling the planned AMBQ share sale under Form 144?

The proposed sale of 10,000 AMBQ common shares is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, located at One New York Plaza, 8th Floor, New York, NY 10004.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/11/2026 - 04:16 PM EDT Accepted by SEC EDGAR 09/11/2026 - 04:15 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001266870
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AMBIQ MICRO, INC.
SEC File Number	001-42766
Address of Issuer	6500 River Place Blvd. Building 7 Austin TEXAS 78730
Phone	(512) 879-2850
Name of Person for Whose Account the Securities are To Be Sold	KER ZHANG
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	10000	634361.00	24185000	09/11/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/01/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			1488	09/01/2026	Services Rendered
Common	03/01/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			1072	03/01/2025	Services Rendered
Common	06/01/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			1488	06/01/2026	Services Rendered
Common	12/01/2025	Restricted Stock Vesting Under a Registered Plan	Issuer			5952	12/01/2025	Services Rendered

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
KER ZHANG 6500 River Place Blvd. Building 7 Austin TX 78730	Common	09/04/2026	185	10530.20

144: Remarks and Signature

Remarks
Date of Notice	09/11/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Ker Zhang
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)