# EDGAR Filing Document

**Accession Number:** 0001275014
**File Stem:** 0001628280-26-029413
**Filing Date:** 2026-5
**Character Count:** 10626
**Document Hash:** 575999a4997d64474d900b3b435dcf0e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-029413.hdr.sgml**: 20260501

**ACCESSION NUMBER**: 0001628280-26-029413

**CONFORMED SUBMISSION TYPE**: 10-Q/A

**PUBLIC DOCUMENT COUNT**: 16

**CONFORMED PERIOD OF REPORT**: 20260327

**FILED AS OF DATE**: 20260501

**DATE AS OF CHANGE**: 20260501

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Ultra Clean Holdings, Inc.
- **CENTRAL INDEX KEY:** 0001275014
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 611430858
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1230

**FILING VALUES:**
- **FORM TYPE:** 10-Q/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-50646
- **FILM NUMBER:** 26933572

**BUSINESS ADDRESS:**
- **STREET 1:** 26462 CORPORATE AVENUE
- **CITY:** HAYWARD
- **STATE:** CA
- **ZIP:** 94545
- **BUSINESS PHONE:** (510) 576-4400

**MAIL ADDRESS:**
- **STREET 1:** 26462 CORPORATE AVENUE
- **CITY:** HAYWARD
- **STATE:** CA
- **ZIP:** 94545

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ULTRA CLEAN HOLDINGS INC
- **DATE OF NAME CHANGE:** 20031231

?xml version='1.0' encoding='ASCII'? uctt-20260327

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**__________________________________________________**

**Form 10-Q/A** 

**__________________________________________________**

**Amendment No. 1**

**(Mark One)**

⌧ **QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the quarterly period ended March 27, 2026**

**or** 

□ **TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the transition period from____________to**

**Commission file number 000-50646** 

**__________________________________________________**

![UCT Logo.jpg](uctt-20260327_g1.jpg)

**Ultra Clean Holdings, Inc.** 

**(Exact name of registrant as specified in its charter)** 

**__________________________________________________**

---

| | |
|:---|:---|
| **Delaware** | **61-1430858** |
| **(State or other jurisdiction of**<br>**incorporation or organization)** | **(I.R.S. Employer**<br>**Identification No.)** |
| **26462 Corporate Avenue, Hayward, California** | **94545** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

**(510) 576-4400**

**Registrant's telephone number, including area code** 

**__________________________________________________**

**Securities registered pursuant to Section 12(b) of the Act:**

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br>**Symbol(s)** | **Name of each exchange on which registered** |
| Common stock, par value $0.001 per share | UCTT | The Nasdaq Stock Market, LLC |

---

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ⌧ No □

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ⌧ No □

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.:

---

| | | | |
|:---|:---|:---|:---|
| 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 13(a) of the Exchange Act. □

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes □ No ⌧

Number of shares outstanding of the issuer's common stock as of April 23, 2026: 44,828,352

------

**EXPLANATORY NOTE**

Ultra Clean Holdings, Inc. (the "Company") is filing this Amendment No. 1 on Form 10-Q/A (this "Amendment") to its Quarterly Report on Form 10-Q for the fiscal quarter ended March 27, 2026, which was originally filed with the Securities and Exchange Commission (the "SEC") on April 29, 2026 (the "Original Filing"). This Amendment is being filed to revise Part II "Item 5. Other Information" by adding Rule 10b5-1 trading arrangements entered into by Sheri Savage, the Company's Chief Financial Officer, and Brian Harding, the Company's Chief Accounting Officer, during the quarter ended March 27, 2026, which was inadvertently omitted from the disclosure included in the Original Filing.

In addition, as required by Rule 12b-15 of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), new certifications by the Company's principal executive officer and principal financial officer are filed herewith as exhibits to this Amendment, under Item 6 hereof, pursuant to Rule 13a-14(a) or 15d-14(a) of the Exchange Act. Because no financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. The Company is also not including new certifications under Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) (Section 906 of the Sarbanes-Oxley Act of 2002), as no financial statements are being filed with this Amendment.

Other than as expressly set forth herein, this Amendment does not, and does not purport to, amend, update or restate the information in the Original Filing or reflect any events that have occurred after the Original Filing was made. Information not affected by this Amendment remains unchanged and reflects the disclosures made at the time as of which the Original Filing was made. No changes have been made to the financial statements of the Company as contained in the Original Filing. Accordingly, this Amendment should be read together with the Original Filing and the Company's other filings with the SEC.

**ITEM 5. Other Information** 

**Insider Trading Arrangements**

On March 5, 2026, Sheri Savage, the Company's Chief Financial Officer, and Brian Harding, the Company's Chief Accounting Officer, each entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act. Ms. Savage's plan provides for the sale from time to time of up to 74,392 shares of the Company's common stock, subject to certain minimum price thresholds. Mr. Savage's trading plan is scheduled to terminate on May 31, 2027, subject to early termination. Mr. Harding's plan provides for the sale from time to time of up to 38,207 shares of the Company's common stock, subject to certain minimum price thresholds. Mr. Harding's trading plan is scheduled to terminate on June 4, 2027, subject to early termination.

------

**ITEM 6. Exhibits** 

(a)Exhibits

The following exhibits are filed with this quarterly Report on Form 10-Q for the quarter ended March 27, 2026:

---

| | |
|:---|:---|
| **Exhibit**<br>**Number** | **Description** |
| &nbsp;&nbsp;31.1 | <u>[Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](uctt-20260327xexx311a.htm)</u> |
| &nbsp;&nbsp;31.2 | <u>[Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](uctt-20260327xexx312a.htm)</u> |
| 101.INS | Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. |
| 101.SCH | Inline XBRL Taxonomy Extension Schema Document |
| 101.CAL | Inline XBRL Taxonomy Calculation Linkbase Document |
| 101.DEF | Inline XBRL Taxonomy Definition Linkbase Document |
| 101.LAB | Inline XBRL Taxonomy Label Linkbase Document |
| 101.PRE | Inline XBRL Taxonomy Extension Presentation Linkbase Document |
| 104 | Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101) |

---

------

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

---

| | | |
|:---|:---|:---|
| | **ULTRA CLEAN HOLDINGS, INC.** | **ULTRA CLEAN HOLDINGS, INC.** |
| | (Registrant) | (Registrant) |
| Date: May 1, 2026 |  |  |
|  | By: | /S/ JAMES XIAO |
|  | Name: | **James Xiao** |
|  | Title: | **Chief Executive Officer** |
|  |  | **(Principal Executive Officer and duly**<br>**authorized signatory)** |
| Date: May 1, 2026 |  |  |
|  | By: | /S/ SHERI SAVAGE |
|  | Name: | **Sheri Savage** |
|  | Title: | **Chief Financial Officer** |
|  |  | **(Principal Financial Officer and duly**<br>**authorized signatory)** |

---

## Exhibit 31.1

**Exhibit 31.1** 

**CERTIFICATION** 

I, James Xiao, certify that:

1. I have reviewed this quarterly report on Form 10-Q/A of Ultra Clean Holdings, Inc.; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

---

| |
|:---|
| Date: May 1, 2026 |
| /s/ JAMES XIAO |
| James Xiao |
| Chief Executive Officer |

---

## Exhibit 31.2

**Exhibit 31.2** 

**CERTIFICATION** 

I, Sheri Savage, certify that:

1. I have reviewed this quarterly report on Form 10-Q/A of Ultra Clean Holdings, Inc.; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

---

| |
|:---|
| Date: May 1, 2026 |
| /s/ SHERI SAVAGE |
| Sheri Savage |
| Chief Financial Officer |

---

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