# EDGAR Filing Document

**Accession Number:** 0001500412
**File Stem:** 0001193125-26-219636
**Filing Date:** 2026-5
**Character Count:** 22375
**Document Hash:** 21ebfbd33cb46d8705552a7cbba45061
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-219636.hdr.sgml**: 20260512

**ACCESSION NUMBER**: 0001193125-26-219636

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 15

**FILED AS OF DATE**: 20260512

**DATE AS OF CHANGE**: 20260512

**EFFECTIVENESS DATE**: 20260512

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Ambiq Micro, Inc.
- **CENTRAL INDEX KEY:** 0001500412
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 271911389
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-295806
- **FILM NUMBER:** 26969278

**BUSINESS ADDRESS:**
- **STREET 1:** 6500 RIVER PLACE BOULEVARD
- **STREET 2:** BUILDING 7, SUITE 200
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78730
- **BUSINESS PHONE:** (512) 879-2850

**MAIL ADDRESS:**
- **STREET 1:** 6500 RIVER PLACE BOULEVARD
- **STREET 2:** BUILDING 7, SUITE 200
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78730

**As filed with the Securities and Exchange Commission on May 12, 2026.** 

**Registration No. 333-** 

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM S-8** 

**REGISTRATION STATEMENT** 

***UNDER***

***THE SECURITIES ACT OF 1933***

## Ambiq Micro, Inc.
**(Exact name of registrant as specified in its charter)** 

---

| | |
|:---|:---|
| **Delaware** | **27 - 1911389** |
| **(State or other jurisdiction of**<br> **incorporation or organization)** | **(I.R.S. Employer**<br> **Identification No.)** |
| **6500 River Place Blvd., Building 7**<br> **Suite 200, Austin, Texas** | **78730** |
| **(Address of Principal Executive Offices)**<br>| **(Zip Code)** |

---

**Ambiq Micro, Inc. 2025 Equity Incentive Plan** 

**Ambiq Micro, Inc. 2025 Employee Stock Purchase Plan** 

**(Full titles of the plans)** 

**Fumihide Esaka** 

**Chief Executive Officer** 

**Ambiq Micro, Inc.** 

**6500 River Place Blvd., Building 7** 

**Suite 200 Austin, Texas 78730** 

**(Name and address of agent for service)** 

**(512) 879-2850** 

**(Telephone number, including area code, of agent for service)** 

***Copies to:***

**Christina T. Roupas** 

**Courtney M.W. Tygesson** 

**Michael Platt** 

**Alaina DeBona** 

**Cooley LLP** 

**110 North Wacker Drive, Suite 4200** 

**Chicago, Illinois 60606** 

**Tel: (312) 881-6500** 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☐ | Accelerated filer | ☐ |
| Non-accelerated filer | ☒ | Smaller reporting company | ☒ |
|  |  | Emerging growth company | ☒ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

------

**EXPLANATORY NOTE** 

Pursuant to General Instruction E of Form S-8, Ambiq Micro, Inc. (the "***Registrant***") is filing this Registration Statement with the Securities and Exchange Commission (the "***Commission***") to register an additional 1,282,184 shares of the Registrant's common stock, comprising (i) 915,846 shares of common stock to be issued pursuant to the Registrant's 2025 Equity Incentive Plan (the "***2025 Plan***"), under the provisions of the 2025 Plan providing for an automatic increase in the number of shares of common stock reserved and available for issuance under the 2025 Plan on January 1, 2026, and (ii) 366,338 shares of common stock to be issued pursuant to the Registrant's 2025 Employee Stock Purchase Plan (the "***2025 ESPP***"), under the provisions of the 2025 ESPP providing for an automatic increase in the number of shares of common stock reserved and available for issuance under the 2025 ESPP on January 1, 2026.

In accordance with the instructional note to Part I of Form S-8 as promulgated by the Commission, the information specified by Part I of the Form S-8 has been omitted from this Registration Statement.

**PART II** 

**Item 3.** **Incorporation of Documents by Reference.** <br>

The Registrant hereby incorporates by reference into this Registration Statement the following documents previously filed by the Registrant with the Commission:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The contents of the Registrant's Registration Statement on Form S-8 (File No. [333-289133](http://www.sec.gov/Archives/edgar/data/1500412/000119312525170549/d22247ds8.htm)), filed with the Commission on July 31,
2025;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The Registrant's Annual Report on Form 10-K for the fiscal year
ended December 31, 2025, filed with the Commission on [March 5, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/1500412/000119312526094004/ambq-20251231.htm) (File No. 001-42766);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) The information specifically incorporated by reference into the Registrant's Annual Report on Form 10-K for the year ended December 
31, 2025 from the Registrant's Definitive Proxy Statement on [Schedule 14A](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/1500412/000119312526170349/ambq-20260422.htm) filed with the SEC on
April 22, 2026;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) The Registrant's Current Report on Form 8-K filed with the
Commission on [January 8, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/1500412/000119312526007673/d60304d8k.htm) (File No. 001-42766);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) The description of the Registrant's Common Stock contained in the Registrant's Registration
Statement on [Form 8-A](http://www.sec.gov/Archives/edgar/data/1500412/000119312525165422/d50867d8a12b.htm) filed with the Commission on July 25, 2025 (File No. 001-42766) under Section 12(b) of the Securities Exchange Act of 1934, as amended (the "  ***Exchange Act*** "), including any amendment or report filed for the purpose of
updating such description, including [Exhibit 4.1](http://www.sec.gov/Archives/edgar/data/1500412/000119312526094004/ambq-ex4_1.htm) to the Registrant's Annual Report on Form 10-K for the
fiscal year ended December 31, 2025, filed with the Commission on March 5, 2026; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) The Registrant's Quarterly Report on Form 10-Q for the quarterly
period ended March 31, 2026, filed with the Commission on [May 12, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/1500412/000119312526219341/ambq-20260331.htm) .

All documents filed by the Registrant pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this Registration Statement and prior to the filing of a post-effective amendment which indicates that all securities offered hereby have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the date of filing of such documents; provided, however, that documents or portions thereof that are furnished and not filed in accordance with the rules of the Commission shall not be deemed incorporated by reference into this Registration Statement. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement herein or in any other subsequently filed document that also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not constitute a part of this Registration Statement, except as so modified or superseded.

------

**Item 8.** **Exhibits.** <br>

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Exhibit<br>Number** | **Description** | **Schedule<br>Form** | **File Number** | **Exhibit** | **Filing Date** |
| 4.1 | [Amended and Restated Certificate of Incorporation of Ambiq Micro, Inc.](http://www.sec.gov/Archives/edgar/data/1500412/000119312525170496/d64492dex31.htm) | 8-K | 001-042766 | 3.1 | July 31, 2025 |
| 4.2 | [Amended and Restated Bylaws of Ambiq Micro, Inc.](http://www.sec.gov/Archives/edgar/data/1500412/000119312525161443/d377490dex36.htm) | S-1/A | 333-288497 | 3.6 | July 21, 2025 |
| 4.3 | [Form of Common Stock Certificate of the Registrant.](http://www.sec.gov/Archives/edgar/data/1500412/000119312525155270/d377490dex41.htm) | S-1 | 333-288497 | 4.1 | July 3, 2025 |
| 5.1\* | [Opinion of Cooley LLP.](d75275dex51.htm) |  |  |  |  |
| 23.1\* | [Consent of KPMG LLP, Independent Registered Public Accounting Firm.](d75275dex231.htm) |  |  |  |  |
| 23.2\* | [Consent of Cooley LLP (included in Exhibit 5.1).](d75275dex51.htm) |  |  |  |  |
| 24.1\* | [Power of Attorney (included on the signature page of this Form S-8).](#sig) |  |  |  |  |
| 99.1 | [2025 Equity Incentive Plan.](http://www.sec.gov/Archives/edgar/data/1500412/000119312525161443/d377490dex107.htm) | S-1/A | 333-288497 | 10.7 | July 21, 2025 |
| 99.2 | [Forms of Stock Option Grant Notice, Stock Option Agreement, and Notice of Exercise under the 2025 Equity Incentive Plan.](http://www.sec.gov/Archives/edgar/data/1500412/000119312525161443/d377490dex108.htm) | S-1/A | 333-288497 | 10.8 | July 21, 2025 |
| 99.3 | [Forms of Restricted Stock Unit Award Grant Notice and Award Agreement under the 2025 Equity Incentive Plan.](http://www.sec.gov/Archives/edgar/data/1500412/000119312525170549/d22247dex997.htm) | S-8 | 333-289133 | 99.7 | July 31, 2025 |
| 99.4 | [2025 Employee Stock Purchase Plan.](http://www.sec.gov/Archives/edgar/data/1500412/000119312525170549/d22247dex998.htm) | S-8 | 333-289133 | 99.8 | July 31, 2025 |
| 107\* | [Filing fee table.](d75275dexfilingfees.htm) |  |  |  |  |

---

\* Filed herewith.

------

**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Austin, State of Texas, on May 12, 2026.

---

| |
|:---|
| **AMBIQ MICRO, INC.** |
| /s/ Fumihide Esaka |
| Fumihide Esaka |
| Chief Executive Officer |

---

**POWER OF ATTORNEY** 

KNOW ALL BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Fumihide Esaka and Jeff Winzeler and each of them, as his or her true and lawful attorney-in-fact and agents, each with the full power of substitution, for him or her and in his or her name, place or stead, in any and all capacities, to sign any and all amendments to this registration statement (including post-effective amendments), and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agents, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

---

| | | |
|:---|:---|:---|
| **Signature** | **Title** | **Date** |
| /s/ Fumihide Esaka | Chief Executive Officer and Director | May 12, 2026 |
| Fumihide Esaka | *(Principal Executive Officer)* |  |
| /s/ Jeffrey G. Winzeler | Chief Financial Officer | May 12, 2026 |
| Jeffrey G. Winzeler | *(Principal Financial and Accounting Officer)* |  |
| /s/ Scott Hanson, Ph.D. | Director | May 12, 2026 |
| Scott Hanson, Ph.D. |  |  |
| /s/ Wen Hsieh, Ph.D. | Director | May 12, 2026 |
| Wen Hsieh, Ph.D. |  |  |
| /s/ Ker Zhang, Ph.D. | Director | May 12, 2026 |
| Ker Zhang, Ph.D. |  |  |
| /s/ Joseph Tautges | Director | May 12, 2026 |
| Joseph Tautges |  |  |
| /s/ Timothy Chen | Director | May 12, 2026 |
| Timothy Chen |  |  |
| /s/ Bernard B. Banks, Ph.D. | Director | May 12, 2026 |
| Bernard B. Banks, Ph.D. |  |  |

---

## Exhibit 5.1

**Exhibit 5.1**![LOGO](g75275g0509070911797.jpg)

Christina Roupas

T: (312) 881-6670

croupas@cooley.com

May 12, 2026

Ambiq Micro, Inc.

6500 River Place Blvd.

Building 7, Suite 200

Austin, Texas 78730

Ladies and Gentlemen:

We have acted as counsel to Ambiq Micro, Inc., a Delaware corporation (the "***Company***"), in connection with the filing by the Company of a registration statement on Form S-8 (the "Registration Statement") with the Securities and Exchange Commission (the "Commission") covering the offering of up to 1,282,184 shares (the "***Shares***") of the Company's common stock, par value $0.000001 per share ("***Common Stock***"), consisting of (i) up to 915,846 shares of Common Stock issuable pursuant to the Company's 2025 Equity Incentive Plan (the "***2025 Plan***") and (ii) up to 366,338 shares of Common Stock issuable pursuant to the Company's 2025 Employee Stock Purchase Plan (together with the 2025 Plan, the "***Plans***").

In connection with this opinion, we have examined and relied upon (a) the Registration Statement and the related prospectuses, (b) the Company's certificate of incorporation and bylaws, each as currently in effect, (c) the Plans and (d) such other records, documents, opinions, certificates, memoranda and instruments as in our judgment are necessary or appropriate to enable us to render the opinion expressed below. We have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to originals of all documents submitted to us as copies, the accuracy, completeness and authenticity of certificates of public officials and the due authorization, execution and delivery of all documents by all persons other than the Company. As to certain factual matters, we have relied upon a certificate of an officer of the Company and have not independently verified such matters.

Our opinion is expressed only with respect to the General Corporation Law of the State of Delaware. We express no opinion to the extent that any other laws are applicable to the subject matter hereof and express no opinion and provide no assurance as to compliance with any federal or state securities law, rule or regulation.

On the basis of the foregoing, and in reliance thereon, we are of the opinion that the Shares, when sold and issued in accordance with the Plans, the Registration Statement and the related prospectuses, will be validly issued, fully paid and nonassessable (except as to Shares issued pursuant to deferred payment arrangements, which will be fully paid and nonassessable when such deferred payments are made in full).

This opinion is limited to the matters expressly set forth in this letter, and no opinion should be implied, or may be inferred, beyond the matters expressly stated. This opinion speaks only as to law and facts in effect or existing as of the date hereof, and we have no obligation or responsibility to update or supplement this opinion to reflect any facts or circumstances that may hereafter come to our attention or any changes in law that may hereafter occur.

Cooley LLP 110 N. Wacker Drive, Suite 4200 Chicago, IL 60606

t: +1 312 818 6500 f: +1 312 818 6598 cooley.com

------

![LOGO](g75275g0509070911797.jpg)

May 12, 2026

Page Two

We consent to the filing of this opinion as an exhibit to the Registration Statement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the rules and regulations of the Commission thereunder.

---

| | |
|:---|:---|
| Cooley LLP | Cooley LLP |
| By: | /s/ Christina T. Roupas |
|  | Christina T. Roupas |

---

Cooley LLP 110 N. Wacker Drive, Suite 4200 Chicago, IL 60606

t: +1 312 818 6500 f: +1 312 818 6598 cooley.com

## Exhibit 23.1

**Exhibit 23.1** 

---

| | |
|:---|:---|
| ![LOGO](g75275g0512004840974.jpg) | <br>KPMG LLP<br> Suite 1900 <br>111 Congress Avenue <br>Austin, TX 78701-4091 |

---

**Consent of Independent Registered Public Accounting Firm** 

We consent to the use of our report dated March 5, 2026, with respect to the consolidated financial statements of Ambiq Micro, Inc. and subsidiaries, incorporated herein by reference.

/s/ KPMG LLP

Austin, Texas

May 12, 2026

KPMG LLP, a Delaware limited liability partnership, and its subsidiaries are part of the KPMG global organization of independent member firms affiliated with KPMG International Limited, a private English company limited by guarantee.

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

---

| |
|:---|
| **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**S-8**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**Ambiq Micro, Inc.**  |

---

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | **Security Type**  | **Security Class Title**  | **Fee Calculation Rule**  | **Amount Registered**  | **Proposed Maximum Offering Price Per Unit**  | **Maximum Aggregate Offering Price**  | **Fee Rate**  | **Amount of Registration Fee**  |
| 1 | Equity | Common Stock, par value $0.000001 per share, reserved for issuance pursuant to the 2025 Equity Incentive Plan | 457(a) | 915846 | $39.27 | $35965272.42 | 0.0001381 | $4966.80 |
| 2 | Equity | Common Stock, par value $0.000001 per share, reserved for issuance pursuant to the 2025 Employee Stock Purchase Plan | 457(a) | 366338 | $33.38 | $12228362.44 | 0.0001381 | $1688.74 |
| Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $48193634.86  |  | $6655.54  |
| Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
| Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $6655.54  |

---

 **Offering Note** <br>

<sup>1</sup> The amount registered represents the aggregate number of shares of common stock, par value $0.000001 per share ("Common Stock"), of Ambiq Micro, Inc. (the "Registrant") that were automatically added to the shares authorized for issuance under the Registrant's 2025 Equity Incentive Plan ("2025 EIP") pursuant to an "evergreen" provision contained therein on January 1, 2026. Pursuant to such provision, the number of shares of Common Stock reserved for issuance under the 2025 EIP automatically increases on January 1st of each year, starting on January 1, 2026 and ending on and including January 1, 2035, in an amount equal to the lesser of (a) 5% of the total shares of Common Stock outstanding on December 31 of the preceding year or (b) such smaller number of shares as determined by the Registrant's board of directors. Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the "Securities Act"), this Registration Statement shall also cover any additional shares of Common Stock that become issuable under the 2025 EIP by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected that results in an increase to the number of outstanding shares of Common Stock. The proposed maximum offering price per share of Common Stock is estimated solely for the purpose of calculating the proposed maximum aggregate offering price and the registration fee in accordance with Rules 457(c) and (h) under the Securities Act, based on the average of the high and low prices of the Common Stock as reported on the New York Stock Exchange on May 7, 2026, which was $39.27 (the "Average Price").

<sup>2</sup> The amount registered represents the aggregate number of shares of Common Stock of the Registrant that were automatically added to the shares authorized for issuance under the Registrant's 2025 Employee Stock Purchase Plan ("2025 ESPP") pursuant to an "evergreen" provision contained therein on January 1, 2026. Pursuant to such provision, the number of shares of Common Stock reserved for issuance under the 2025 ESPP automatically increases on January 1st of each year, starting on January 1, 2026 and ending on and including January 1, 2035, in an amount equal to the lesser of (a) 2% of the total shares of Common Stock outstanding on December 31 of the preceding year or (b) 681,440 shares of Common Stock. Notwithstanding the foregoing, the Registrant's board of directors may act prior to January 1st of a given year to provide that the increase for such year will be a lesser number of shares than provided in the previous sentence. Pursuant to Rule 416(a) promulgated under the Securities Act, this Registration Statement shall also cover any additional shares of Common Stock that become issuable under the 2025 ESPP by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected that results in an increase to the number of outstanding shares of Common Stock. The proposed maximum offering price per share of Common Stock is estimated solely for the purpose of calculating the proposed maximum aggregate offering price and the registration fee in accordance with Rules 457(c) and (h) under the Securities Act, based on the Average Price multiplied by 85%, which is the percentage of the price per share applicable to purchases under the 2025 ESPP.

---

| |
|:---|
| |
| **Rule 457(p)** |
| Fee Offset Claims |
| Fee Offset Sources |

---