Ambiq officer plans $1.7M stock sale under Rule 144

Ambiq Micro officer Sean Chen filed a Rule 144 notice to potentially sell 30,000 common shares via stock option exercises over the next three months.

Rhea-AI Filing Summary

Ambiq Micro, Inc. (AMBQ) reports that officer Sean Chen has filed a notice of proposed sale of company common stock under Rule 144. The planned sales involve up to 30,000 shares of common stock to be received and sold upon the exercise of stock options over a three‑month period.

The shares are to be sold through Morgan Stanley Smith Barney LLC – Executive Financial Services, with an indicated aggregate market value of $1,692,900 and an approximate number of 24,184,536 shares of Ambiq Micro common stock outstanding. The intended transaction date listed is September 4, 2026, and the securities are listed on the NYSE.

Key Figures

Shares to be sold: 30,000 shares Aggregate market value of shares: $1,692,900 Shares outstanding: 24,184,536 shares +2 more

5 metrics

Shares to be sold 30,000 shares Common stock proposed for sale under Rule 144 by officer Sean Chen

Aggregate market value of shares $1,692,900 Reported value of the 30,000 AMBQ shares covered by the Form 144

Shares outstanding 24,184,536 shares Approximate number of Ambiq Micro, Inc. common shares outstanding

Planned sale date September 4, 2026 Intended date of sale for the Rule 144 transaction

Shares underlying stock options 30,000 shares Securities to be received and sold upon exercise of stock options

Key Terms

Rule 144, Exercise of Stock Options, aggregate market value, securities to be sold

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.

Exercise of Stock Options financial

"Common | 09/04/2026 | Exercise of Stock Options | Issuer"

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services ... | 30000 | 1692900.00"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

securities to be sold financial

"The securities to be sold were and will be received upon the exercise"

FAQ

What insider transaction did AMBQ disclose in this Form 144 filing?

Officer Sean Chen filed a Rule 144 notice indicating an intent to sell up to 30,000 shares of Ambiq Micro, Inc. common stock, which will be received and sold upon the exercise of stock options over the next three months.

What is the approximate value of the AMBQ shares covered by Sean Chen’s Form 144?

The notice lists an aggregate market value of approximately $1,692,900 for the 30,000 shares of Ambiq Micro, Inc. common stock proposed to be sold under Rule 144.

How many Ambiq Micro (AMBQ) shares are outstanding according to this Form 144?

The filing states that approximately 24,184,536 shares of Ambiq Micro, Inc. common stock are outstanding, as context for the 30,000 shares covered by the Rule 144 notice.

When are the AMBQ stock sales by Sean Chen expected to occur?

The Form 144 lists September 4, 2026 as the intended date of sale, with remarks explaining that the securities were and will be received upon the exercise of stock options over the next three months.

Through which broker will the AMBQ shares be sold under this Form 144?

The notice identifies Morgan Stanley Smith Barney LLC – Executive Financial Services, located at 1 New York Plaza, New York, as the broker for the proposed sale of 30,000 AMBQ common shares.

On which exchange are the Ambiq Micro (AMBQ) shares listed in this Form 144?

The Form 144 states that the Ambiq Micro, Inc. common stock covered by the notice is listed on the NYSE, and the proposed sale concerns 30,000 shares received upon stock option exercises.

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

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Available on EDGAR 09/04/2026 - 04:40 PM Accepted by SEC EDGAR 09/04/2026 - 04:39 PM 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	0002078559
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 Suite 200 Austin TEXAS 78730
Phone	5128792850
Name of Person for Whose Account the Securities are To Be Sold	SEAN CHEN
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	Officer

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	30000	1692900.00	24184536	09/04/2026	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	09/04/2026	Exercise of Stock Options	Issuer			30000	09/04/2026	Cash

* 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

Nothing to Report

144: Remarks and Signature

Remarks	The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
Date of Notice	09/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/05/2026
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/ Sean Chen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)