Ambiq exec plans $2.0M share sale after option exercise

Ambiq Micro, Inc. (AMBQ) received a Rule 144 notice from Fumihide (Humi) Esaka covering a planned sale of 35,000 shares of common stock through Morgan Stanley Smith Barney LLC.

Rhea-AI Filing Summary

Ambiq Micro, Inc. (AMBQ) received a Rule 144 notice from Fumihide (Humi) Esaka covering a planned sale of 35,000 shares of common stock through Morgan Stanley Smith Barney LLC. The shares are tied to an exercise of options under a registered plan, acquired from the issuer for cash. The filing lists an aggregate market value of $2,009,854.00 for the planned sale and shows 24,184,536 shares of common stock outstanding as of this notice. In the prior three months, Esaka reported selling 13,500 shares of common stock for $869,225.85.

Key Figures

Shares to be sold: 35,000 shares of common stock Aggregate market value: $2,009,854.00 Shares outstanding: 24,184,536 shares +3 more

6 metrics

Shares to be sold 35,000 shares of common stock Planned sale by Fumihide (Humi) Esaka under Rule 144

Aggregate market value $2,009,854.00 Aggregate market value of 35,000 shares covered by the notice

Shares outstanding 24,184,536 shares Common shares outstanding noted in connection with the Form 144

Recent shares sold 13,500 shares Shares of common stock sold on 08/14/2026 by Fumihide Esaka

Proceeds from recent sale $869,225.85 Total consideration for 13,500 shares sold on 08/14/2026

Planned sale date 08/31/2026 Date listed for the planned Rule 144 sale

Key Terms

Rule 144, Exercise of Options Under a Registered Plan, aggregate market value, Issuer, +1 more

5 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 Options Under a Registered Plan financial

"Exercise of Options Under a Registered Plan | Issuer"

aggregate market value financial

"35000 | 2009854.00 | 24184536 | 08/31/2026"

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.

Issuer regulatory

"Exercise of Options Under a Registered Plan | Issuer"

Securities To Be Sold financial

"144: Securities To Be Sold"

FAQ

What insider sale is disclosed for AMBQ in this Form 144?

The notice discloses that Fumihide (Humi) Esaka plans to sell 35,000 shares of Ambiq Micro, Inc. common stock. The sale is in connection with an exercise of options under a registered plan and is to be executed for cash through Morgan Stanley Smith Barney LLC.

What is the aggregate market value of the AMBQ shares covered by this Form 144?

The Form 144 lists an aggregate market value of $2,009,854.00 for the 35,000 shares of Ambiq Micro, Inc. common stock that are planned to be sold under this notice.

How many AMBQ shares are shown as outstanding in the Form 144?

The Form 144 lists 24,184,536 shares of Ambiq Micro, Inc. common stock as outstanding in connection with this notice. This figure provides context for the size of the 35,000-share planned sale.

What recent AMBQ insider sales are reported over the past three months?

Over the past three months, the filing reports that Fumihide Esaka sold 13,500 shares of Ambiq Micro, Inc. common stock on 08/14/2026 for total proceeds of $869,225.85.

How will the AMBQ shares in this Form 144 be acquired and paid for?

The shares are associated with an exercise of options under a registered plan, acquired from the issuer, with the Form 144 indicating that the acquisition is for cash.

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

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Available on EDGAR 08/31/2026 - 04:37 PM Accepted by SEC EDGAR 08/31/2026 - 04:37 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	0002078454
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	FUMIHIDE (HUMI) ESAKA
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
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	35000	2009854.00	24184536	08/31/2026	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	08/31/2026	Exercise of Options Under a Registered Plan	Issuer			35000	08/31/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Fuhmide Esaka 6500 River Place Blvd. Building 7 Austin TX 78730	common	08/14/2026	13500	869225.85

144: Remarks and Signature

Remarks
Date of Notice	08/31/2026
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/ Fumihide Esaka
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)