# EDGAR Filing Document

**Accession Number:** 0001500412
**File Stem:** 0001193125-25-168146
**Filing Date:** 2025-7
**Character Count:** 15781
**Document Hash:** 5aaac9b80aa7a082f029de2e126e7e07
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-168146.hdr.sgml**: 20250729

**ACCESSION NUMBER**: 0001193125-25-168146

**CONFORMED SUBMISSION TYPE**: S-1MEF

**PUBLIC DOCUMENT COUNT**: 6

**FILED AS OF DATE**: 20250729

**DATE AS OF CHANGE**: 20250729

**EFFECTIVENESS DATE**: 20250729

**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-1MEF
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-289060
- **FILM NUMBER:** 251163140

**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 July 29, 2025.** 

**Registration No. 333-** 

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM S-1**

**REGISTRATION STATEMENT** 

***Under***

***The Securities Act of 1933***

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

---

| | | |
|:---|:---|:---|
| **Delaware** | **3674** | **27-1911389** |
| **(State or other jurisdiction of**<br> **incorporation or organization)** | **(Primary Standard Industrial**<br> **Classification Code Number)** | **(I.R.S. Employer**<br> **Identification No.)** |

---

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

**Suite 200 Austin, Texas 78730** 

**(512) 879-2850** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

**Fumihide Esaka** 

**Chief Executive Officer** 

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

**Suite 200 Austin, Texas 78730** 

**(512) 879-2850** 

**(Name, address, including zip code, and telephone number, including area code, of agent for service)** 

***Copies to:***

---

| | |
|:---|:---|
| **Christina T. Roupas**<br> **Courtney M.W. Tygesson**<br> **Michael Platt**<br> **Grady Chang**<br> **Cooley LLP**<br> **110 N. Wacker Drive, Suite 4200**<br> **Chicago, Illinois 60606**<br> **(312) 881-6500** | **Alan F. Denenberg**<br> **Emily Roberts**<br> **Davis Polk & Wardwell LLP**<br> **900 Middlefield Road, Suite 200**<br> **Redwood City, CA 94063**<br> **(650) 752-2000** |

---

**Approximate date of commencement of proposed sale to the public:** As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box: ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☒ (333-288497)

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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.

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| | | | |
|:---|:---|:---|:---|
| 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. ☐

**The Registration Statement shall become effective upon filing in accordance with Rule 462(b) promulgated under the Securities Act of 1933, as amended.** 

------

**EXPLANATORY NOTE AND INCORPORATION BY REFERENCE** 

This Registration Statement is being filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the "***Securities Act***"), by Ambiq Micro, Inc. (the "***Registrant***"), for the sole purpose of increasing the aggregate number of shares of common stock offered and registered by the Earlier Registration Statement (as defined below) by 690,000 shares, 90,000 of which are subject to purchase upon exercise of the underwriters' option to purchase additional shares of the Registrant's common stock. The contents of the Registration Statement on Form S-1, as amended (File No. 333-288497), including all exhibits thereto (the "***Earlier Registration Statement***"), filed by the Registrant with the Securities and Exchange Commission (the "***Commission***") pursuant to the Securities Act, which was declared effective by the Commission on July 29, 2025, are incorporated by reference into this Registration Statement. The additional shares of common stock that are being registered for issuance and sale pursuant to this Registration Statement are in an amount and at a price that together represent no more than 20% of the maximum aggregate offering price set forth in Exhibit 107 of the Earlier Registration Statement.

The required opinion and consents are listed on an Exhibit Index attached hereto and filed herewith.

**EXHIBIT INDEX** 

---

| | |
|:---|:---|
| **Exhibit<br>No.** | **Description** |
| &nbsp;&nbsp;&nbsp;&nbsp;5.1 | [Opinion of Cooley LLP.](d21027dex51.htm) |
| 23.1 | [Consent of Independent Registered Public Accounting Firm.](d21027dex231.htm) |
| 23.4 | [Consent of Cooley LLP (included in Exhibit 5.1).](d21027dex51.htm) |
| 24.1\* | [Power of Attorney.](d21027ds1mef.htm#sig) |
| 107 | [Filing Fee Table.](d21027dexfilingfees.htm) |

---

\* Previously filed on the signature page to the Registrant's Registration Statement on Form S-1 (File No. 333-288497), originally filed with the Securities and Exchange Commission on July 3, 2025 and incorporated by reference herein.

------

**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant 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 July 29, 2025.

---

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

---

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement on Form S-1 has been signed by the following persons in the capacities held on the dates indicated.

---

| | | |
|:---|:---|:---|
| **Signature** | **Title** | **Date** |
| /s/ Fumihide Esaka<br> Fumihide Esaka | Chief Executive Officer and Director<br> *(Principal Executive Officer)* | July 29, 2025 |
| /s/ Jeff Winzeler<br> Jeff Winzeler | Chief Financial Officer<br> (*Principal Financial and Accounting Officer*) | July 29, 2025 |
| \*<br> Scott Hanson, Ph.D | Director | July 29, 2025 |
| \*<br> Wen Hsieh, Ph.D. | Director | July 29, 2025 |
| \*<br> Ker Zhang, Ph.D. | Director | July 29, 2025 |
| \*<br> Joseph Tautges | Director | July 29, 2025 |
| \*<br> Timothy Chen | Director | July 29, 2025 |

---

---

| | |
|:---|:---|
| \* By: | /s/ Fumihide Esaka |
|  | Fumihide Esaka |
|  | Attorney-in-Fact |

---

## Exhibit 5.1

**EXHIBIT 5.1**![LOGO](g21027g0729224337694.jpg)

Christina T. Roupas

T: +1 312 881 6670

croupas@cooley.com

July 29, 2025

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-1 (the "***Registration Statement***") with the Securities and Exchange Commission (the "***Commission***") pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the "***Securities Act***"), covering an underwritten public offering of up to 690,000 shares (the "***Shares***") of the Company's Class A common stock, par value $0.000001 per share. The Registration Statement incorporates by reference the registration statement on Form S-1 (No. 333-288497) (the "***Prior Registration Statement***"), including the prospectus that was included in the Prior Registration Statement (the "***Prospectus***").

In connection with this opinion, we have (i) examined and relied upon (a) the Registration Statement and the Prospectus, (b) the Prior Registration Statement, (c) the Company's certificate of incorporation and bylaws, each as currently in effect, (d) the forms of the Company's Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws, filed as Exhibits 3.4 and 3.6 to the Registration Statement, respectively, each of which is to be in effect in connection with the closing of the offering contemplated by the Registration Statement, and (e) 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 and (ii) assumed that the Amended and Restated Certificate of Incorporation referred to in clause (i)(c) is filed with the Secretary of State of the State of Delaware before issuance of the Shares.

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, in reliance thereon and subject to the assumptions, qualifications, limitations and exceptions contained herein, we are of the opinion that the Shares, when sold and issued against payment therefor as described in the Registration Statement and the Prospectus, will be validly issued, fully paid and nonassessable.

COOLEY LLP 110 N. WACKER DRIVE SUITE 4200 CHICAGO, IL 60606

T: (312) 881-6500 F: (312) 881-6598 COOLEY.COM

------

![LOGO](g21027g0729224337694.jpg)

Ambiq Micro, Inc.

This opinion is limited to the matters expressly set forth in this letter, and no opinion has been or 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 letter to reflect any facts or circumstances that may hereafter come to our attention or any changes in law that may hereafter occur.

We consent to the reference to our firm under the caption "Legal Matters" in the Prospectus included in the Prior Registration Statement and to the filing of this opinion as an exhibit to the Registration Statement. In giving such consents, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission thereunder.

---

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

---

COOLEY LLP 110 N. WACKER DRIVE SUITE 4200 CHICAGO, IL 60606

T: (312) 881-6500 F: (312) 881-6598 COOLEY.COM

## Exhibit 23.1

**Exhibit 23.1**![LOGO](g21027snap2.jpg)

KPMG LLP

Suite 1900

111 Congress Avenue

Austin, TX 78701-4091

**Consent of Independent Registered Public Accounting Firm** 

We consent to the use of our report dated March 31, 2025, except for Note 16, as to which the date is July 19, 2025, with respect to the consolidated financial statements of Ambiq Micro, Inc., incorporated herein by reference, and to the reference to our firm under the heading "Experts" in the prospectus.

/s/ KPMG LLP

Austin, Texas

July 25, 2025

KPMG LLP, a Delaware limited liability partnership and a member firm of

the KPMG global organization of independent member firms affiliated with

KPMG International Limited, a private English company limited by guarantee.

## Ex-Filing

**Exhibit 107** 

**Calculation of Filing Fee Tables** 

**Form S-1**

**Ambiq Micro, Inc.** 

<u>Table 1: Newly Registered Securities</u> 

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| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | Security<br> Type | Security<br> Class<br> Title | Fee<br> Calculation <br> or Carry<br> Forward<br> Rule | Amount<br> Registered<sup>(1)</sup>  | Proposed<br> Maximum <br> Offering<br> Price Per<br> Unit<sup>(2)</sup> | Maximum <br> Aggregate <br> Offering<br> Price | Fee<br> Rate | Amount of <br> Registration <br> Fee |
| &nbsp;&nbsp;&nbsp;Fees to Be Paid | Equity | Common stock, <br> par value <br> $0.000001 per <br> share  | 457(a) | 690000 | $24.00 | $16560000 | 0.00015310 | $2536 |
|  | Total Offering Amounts | Total Offering Amounts | Total Offering Amounts | Total Offering Amounts |  | $16560000 |  | $2536 |
|  | Total Fees Previously Paid | Total Fees Previously Paid | Total Fees Previously Paid | Total Fees Previously Paid |  |  |  |  |
|  | Total Fee Offsets | Total Fee Offsets | Total Fee Offsets | Total Fee Offsets |  |  |  |  |
|  | Net Fee Due | Net Fee Due | Net Fee Due | Net Fee Due |  |  |  | $2536<sup>(3)</sup> |

---

(1) Represents only the additional number of shares being registered and includes 90,000 shares of common stock
issuable upon exercise of the underwriters' option to purchase additional shares. Does not include the securities that the Registrant previously registered on the Registration Statement on Form S-1 (File No. 333-288497), as amended (the "Earlier Registration Statement").

(2) Based on the public offering price.

(3) The registration fee is calculated in accordance with Rule 457(a) under the Securities Act of 1933, as amended,
based on the proposed maximum aggregate offering price. The registrant previously registered securities on the Earlier Registration Statement having a proposed maximum aggregate offering price of $97,750,000, which was declared effective by the
Securities and Exchange Commission on July 29 2025. In accordance with Rule 462(b) under the Securities Act, an additional amount of securities having a proposed maximum aggregate offering price of $16,560,000 is hereby registered, which includes
shares issuable upon the exercise of the underwriters' option to purchase additional shares.