AMBQ sale notice: proposed resale of 55,685 shares

AMBQ filing a Form 144 notice for proposed sales related to option exercises dated 05/15/2026.

Rhea-AI Filing Summary

AMBQ filing a Form 144 notice for proposed sales related to option exercises dated 05/15/2026. The broker listed is Morgan Stanley Smith Barney LLC. The excerpt lists 55,685 common shares and two exercise-related line items of 23,093 and 32,592 shares, with a dollar figure of $3,947,281.34.

Insights

Securities Counsel

Form 144 is a notice of proposed resale, not a trade confirmation.

Form 144 provides a broker-mediated notice that affiliated holders intend to sell securities; it does not itself report completed sales. The excerpt lists broker information, share counts, and the exercise context "Exercise of options under a registered plan" dated 05/15/2026.

Cash-flow treatment appears tied to exercise proceeds (the excerpt shows the word "Cash" next to exercises). Subsequent filings or broker confirmations would show executed transactions and proceeds.

Key Figures

Shares listed: 55,685 shares Exercise line item A: 23,093 shares Exercise line item B: 32,592 shares +2 more

5 metrics

Shares listed 55,685 shares Listed in the excerpt alongside broker details dated 05/15/2026

Exercise line item A 23,093 shares "Exercise of options under a registered plan" entry dated 05/15/2026

Exercise line item B 32,592 shares "Exercise of options under a registered plan" entry dated 05/15/2026

Dollar figure shown $3,947,281.34 Appears in the filer/securities information row dated 05/15/2026

Numeric field 21,375,754 Numeric value present in the securities information row dated 05/15/2026

Key Terms

Form 144, Exercise of options under a registered plan, Issuer

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Exercise of options under a registered plan financial

"Common | 05/15/2026 | Exercise of options under a registered plan"

Issuer financial

"Exercise of options under a registered plan | Issuer | Cash"

FAQ

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

What does AMBQ's Form 144 filing show?

The filing is a proposed resale notice for securities dated 05/15/2026. The excerpt lists broker information, share counts of 55,685, and exercise line items of 23,093 and 32,592 tied to option exercises.

Who is the broker handling the transaction for AMBQ?

The broker named is Morgan Stanley Smith Barney LLC. The filing lists an address at 1 New York Plaza, 8th Floor, New York, NY 10004 and connects the broker to the securities-to-be-sold entries dated 05/15/2026.

How many shares are listed in the excerpted filing for AMBQ?

The excerpt shows an aggregate figure of 55,685 common shares and two exercise-related line items of 23,093 and 32,592. Those numbers appear alongside the date 05/15/2026 in the excerpt.

Does the filing show any dollar amounts for the transactions?

A dollar figure of $3,947,281.34 appears in the excerpt. It is presented alongside other broker and securities fields dated 05/15/2026 within the provided content.

Are the sales described as resulting from option exercises?

Yes. The excerpt explicitly states "Exercise of options under a registered plan" for the listed common shares dated 05/15/2026, with "Issuer" and "Cash" noted in the same lines.

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

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Accepted by SEC EDGAR 05/15/2026 - 04:13 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	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 Austin TEXAS 78730
Phone	(512) 879-2850
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	55685	3947281.34	21375754	05/15/2026	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	05/15/2026	Exercise of options under a registered plan	Issuer			23093	05/15/2026	Cash
Common	05/15/2026	Exercise of options under a registered plan	Issuer			32592	05/15/2026	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
Date of Notice	05/15/2026
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)