Document

SD 1 a2025formsd.htm SD Document

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM SD

SPECIALIZED DISCLOSURE REPORT

Ultra Clean Holdings, Inc.

(Exact name of Registrant as Specified in Its Charter)

Delaware

000-50646

61-1430858

(State or Other Jurisdiction
of Incorporation)

(Commission File Number)

(IRS Employer
Identification No.)

26462 Corporate Avenue

Hayward, California

94545

(Address of Principal Executive Offices)

(Zip Code)

Paul Y. Cho
(510) 576-4400

(Name and telephone number, including area code, of the person to contact in connection with this report.)

Check the appropriate box to indicate the rule pursuant to which this form is being filed:

x Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1, 2025 to December 31, 2025.

☐ Rule 13q-1 under the Securities Exchange Act (17 CFR 240.13q-1) for the fiscal year ended.

Section 1 – Conflict Minerals Disclosure

Item 1.01 Conflict Minerals Disclosure and Report

Conflict Minerals Disclosure

The registrant’s Conflict Minerals Report for the reporting period from January 1, 2025 to December 31, 2025 is provided as Exhibit 1.01 hereto and is publicly available at: www.uct.com under “Corporate Governance.” The content on any web site referred to in this Form SD is not incorporated by reference into this Form SD unless expressly noted.

Item 1.02 Exhibit

A copy of the Company’s Conflict Minerals Report as required by Item 1.01 is filed as Exhibit 1.01 hereto.

Section 3 – Exhibits

Item 3.01 Exhibits

The following exhibit is filed as part of this report.


Exhibit						Exhibit Description
1.01						Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

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.

Date:	May 26, 2026	By:	/s/ Paul Y. Cho
			Name: Paul Y. Cho Title: General Counsel and Corporate Secretary

SEC Form SD filed by Ultra Clean Holdings Inc.