Fumihide Esaka plans $625K Ambiq stock sale

Rhea-AI Filing Summary

Ambiq Micro, Inc. (AMBQ) received a notice under Rule 144 that Fumihide (Humi) Esaka intends to sell 11,027 shares of common stock, expected to be sold through Morgan Stanley Smith Barney LLC on September 2, 2026, following an exercise of options under a registered plan.

The shares proposed for sale have an indicated aggregate market value of $625,108.50. Ambiq Micro reports that 24,184,536 shares of common stock were outstanding, which is a baseline figure, not the amount being sold.

Key Figures

Shares proposed for sale: 11,027 shares Aggregate market value of proposed sale: $625,108.50 Shares outstanding: 24,184,536 shares +4 more

7 metrics

Shares proposed for sale 11,027 shares Common stock covered by the Rule 144 notice

Aggregate market value of proposed sale $625,108.50 Value of 11,027 AMBQ shares in the Rule 144 securities information

Shares outstanding 24,184,536 shares Ambiq Micro, Inc. common stock outstanding as reported in the Rule 144 section

Shares sold on September 1, 2026 48,973 shares Common stock sold by Fumihide Esaka during the past three months

Proceeds on September 1, 2026 sale $2,761,533.60 Value of 48,973 AMBQ shares sold on September 1, 2026

Shares sold on August 31, 2026 35,000 shares Common stock sold by Fumihide Esaka on August 31, 2026

Shares sold on August 14, 2026 13,500 shares Common stock sold by Fumihide Esaka on August 14, 2026

Key Terms

Rule 144, aggregate market value, Exercise of Options Under a Registered Plan, 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.

aggregate market value financial

"Common ... 11027 | 625108.50 | 24184536"

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.

Exercise of Options Under a Registered Plan financial

"Common | 09/02/2026 | Exercise of Options Under a Registered Plan"

Securities To Be Sold regulatory

"144: Securities To Be Sold"

FAQ

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

What does the Form 144 filing disclose for AMBQ?

It discloses that Fumihide (Humi) Esaka has filed a Rule 144 notice to sell 11,027 shares of Ambiq Micro, Inc. common stock, in connection with an exercise of options under a registered plan, with the proposed sale date of September 2, 2026.

How many AMBQ shares are proposed to be sold in this Form 144?

The notice covers a proposed sale of 11,027 shares of Ambiq Micro, Inc. common stock. The filing lists an aggregate market value of $625,108.50 for these shares in the Rule 144 securities information section.

What prior AMBQ share sales has Fumihide Esaka reported in the last three months?

The filing lists sales of 48,973 shares on September 1, 2026 for $2,761,533.60, 35,000 shares on August 31, 2026 for $2,009,854.00, and 13,500 shares on August 14, 2026 for $869,225.85 of Ambiq Micro, Inc. common stock.

What is the reported market value of the AMBQ shares to be sold under this Form 144?

For the 11,027 shares of Ambiq Micro, Inc. common stock covered by the notice, the filing states an aggregate market value of $625,108.50 in the securities information section tied to the proposed Rule 144 sale.

How many Ambiq Micro (AMBQ) shares are reported as outstanding?

The Rule 144 disclosure reports that Ambiq Micro, Inc. has 24,184,536 shares of common stock outstanding. This is provided as a reference outstanding share count, not as a number of shares being sold under the notice.

What is the source of the AMBQ shares being sold in this Rule 144 notice?

The shares are tied to an Exercise of Options Under a Registered Plan, with the issuer listed as Ambiq Micro, Inc. and the consideration shown as cash in the Rule 144 "Securities To Be Sold" section dated September 2, 2026.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/02/2026 - 04:14 PM EDT Accepted by SEC EDGAR 09/02/2026 - 04:14 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	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	11027	625108.50	24184536	09/02/2026	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	09/02/2026	Exercise of Options Under a Registered Plan	Issuer			11027	09/02/2026	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
FUMIHIDE (HUMI) ESAKA 6500 River Place Blvd. Building 7 Austin TX 78730	Common	09/01/2026	48973	2761533.60
FUMIHIDE (HUMI) ESAKA 6500 River Place Blvd. Building 7 Austin TX 78730	Common	08/31/2026	35000	2009854.00
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	09/02/2026
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)